+

WO1986006947A1 - Agencement de determination de la force musculaire - Google Patents

Agencement de determination de la force musculaire Download PDF

Info

Publication number
WO1986006947A1
WO1986006947A1 PCT/AT1986/000043 AT8600043W WO8606947A1 WO 1986006947 A1 WO1986006947 A1 WO 1986006947A1 AT 8600043 W AT8600043 W AT 8600043W WO 8606947 A1 WO8606947 A1 WO 8606947A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring
lever
control unit
measuring lever
pivoting
Prior art date
Application number
PCT/AT1986/000043
Other languages
German (de)
English (en)
Inventor
Hubert Lechner
Thomas Bochdansky
Othmar Platner
Original Assignee
Wintersteiger Gesellschaft M.B.H. & Co.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wintersteiger Gesellschaft M.B.H. & Co. filed Critical Wintersteiger Gesellschaft M.B.H. & Co.
Publication of WO1986006947A1 publication Critical patent/WO1986006947A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4528—Joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/22—Ergometry; Measuring muscular strength or the force of a muscular blow
    • A61B5/224—Measuring muscular strength

Definitions

  • the invention relates to a device for recording the muscle strength during knee extension and / or flexion, with a frame on which an adjustable seat and a pivotable measuring lever to be connected to the lower leg are provided, to which a hydraulic pivot drive device is assigned, which comprises a hydraulic motor , which is connected to a pump via a hydraulic system in which an adjustable flow regulator for adjusting the swivel speed, an adjustable pressure control valve, a directional valve for grinding the direction of the swivel movement and a directional valve for selecting the operating mode are arranged, the pump being in a fluid operating mode to the hydraulic motor and in another operating mode the hydraulic motor is connected in a closed circuit, with a bend of the measuring lever in the case of a knee extension and / or bending and thus a measuring device which detects a torque exerted on the measuring lever, e.g. with strain gauges, as well as with an angular position detector which detects the angular position of the measuring lever.
  • a hydraulic pivot drive device which comprises a hydraulic motor
  • the determination of the effective muscle strength is generally problematic since the measurement, however it is carried out, can and will be influenced by various factors, the consideration or deactivation of which, however, is only insufficiently possible with the previous measurement methods.
  • these factors also include the dependence of the force on the rate of contraction of a muscle and the muscle length (so-called sarcomere length) and the muscle load. This dependency is not taken into account, for example, in the device for measuring muscle strength known from the published international application WO 80/00308, and accordingly, with this known device no really meaningful measured values can be obtained about the respective muscle strength to be recorded.
  • the lower leg is firmly connected to the measuring lever in the area of the ankle by means of a cuff or ankle brace, and the subject now tries to move the measuring lever faster or slower than is caused by a hydraulic system.
  • a certain bend of the measuring lever is brought about, which is detected via a strain gauge full bridge.
  • the bend - and thus the torque exerted by the test subject - is always recorded in a certain angular position of the measuring lever, so that reproducibility is also given in this regard.
  • This measuring angle position of the measuring lever is determined in such a way that the measuring lever has its predetermined angular velocity when passing through this angular position, ie this angular position must not be set too close to the two reversal positions of the measuring lever. However, it is possible that the subject no longer acts with full force on the measuring lever when this angular position is reached, regardless of whether it is in the overcoming or braking area, which can be attributed to psychological or physical fatigue, lack of attitude and the like.
  • test person adjusts to this special measuring method in a learning process and tries to make a special effort in the angular range in question, but also Here, for example because the correct time at which the measurement is taken is missed, falsified measurement results may result.
  • the inventive device of the type mentioned is characterized in that a central control unit is provided, with which the flow regulator, the pressure control valve and the directional valves for the selection of the operating mode and the direction of the pivoting movement are connected on the control side, and a selection device for setting the Flow controller, the pressure control valve and at least the directional control valve for the selection of the operating mode, and that with this central control unit and the angular position indicator and the measuring device, a monitoring unit for at least substantially monitoring the angular position and pivoting speed of the measuring lever is connected to at a predetermined pivot angle and / or to automatically detect the bending and thus the applied torque at a predetermined pivoting speed of the measuring lever.
  • the device it is possible to vary various parameters during a measurement, such as the speed of the swiveling movement imposed on the measuring lever, the angular position of the measuring lever at which the measuring device is activated, the system pressure and the like, so that the subject does not it is possible to adjust to a certain measuring technique, and it should be mentioned that the target presentation 'to be stronger than in the previous measurement' represents an adaptation stimulus that is undesirable for the measurement because this changes the motivational structure.
  • the angular velocity of the measuring lever is kept constant via the hydraulic system.
  • the torque of the knee movement is recorded via the measuring device, for example by means of a strain gauge full bridge, in the angle range of interest, which is monitored and registered in parallel.
  • the measurement is possible in two operating modes, in the myodynamic or overcoming or in the external or yielding pump operation, whereby also a methodically assured reproducibility through multiple measurements, with subsequent error compensation calculation, through the aforementioned prevention of learning through the measurement result and also through the existence a stable and simple movement pattern is possible.
  • influences or disturbances on the skeletal muscle system such as therapy stimuli, training stimuli, medicinal influences, high altitudes or pain, which can be varied, during measurements over the corresponding period, e.g.
  • the device according to the invention can be used with particular advantage in the control or checking of muscle development in sports medicine, rehabilitation and in popular and elite sports, whereby strengthening methods and training methods and their efficiency can be checked.
  • the facility for statistically verified screening examinations in health care, military service or performance diagnostics can also be used to advantage.
  • An advantageous embodiment of the device according to the invention is then characterized in that the monitoring unit further monitors the direction of the pivoting movement of the measuring lever by detecting the control of the directional valve for the direction selection by the central control unit in order to detect the bending of the measuring lever in a selected pivoting direction.
  • the determination of the muscle strength can be carried out automatically when the knee is bent and / or when the knee is stretched, which is important because other muscle parts are shortened when bending or stretching or lengthen.
  • a pressure limitation is primarily important as safety against muscle strength.
  • the pressure in the hydraulic system can be selected by adjusting the pressure control valve accordingly.
  • the monitoring unit is also set up to monitor the pressure set by the pressure control valve at least substantially.
  • an advantageous embodiment of the device according to the invention is further characterized in that the central control unit is assigned a memory for the parameters to be entered by means of the selection device, in particular relating to the swivel speed, angular position and, if appropriate, swivel direction of the measuring lever for the detection of its bending.
  • the central control unit has a sequence control for specifying a specific swivel movement sequence for the measuring lever during a measuring process.
  • the monitoring unit has a comparator connected to the flow rate controller and / or a comparator connected to the pressure control valve for an ongoing comparison of the actual value and the target value.
  • the detection of the knee torque for example, immediately (about 50 ms) after the transition to the changed swiveling speed can be carried out in order not to give the test subjects the opportunity to adjust to the new situation. It did also proved to be advantageous if a ramp circuit connected to the control side of the flow rate regulator and adjustable by the central control unit is provided in order to provide a ramp-shaped transition with adjustable steepness in the event of speed changes.
  • pressure changes can also be made during a measurement process, and it is particularly advantageous if a ramp circuit connected to the control side of the pressure control valve and adjustable by the central control unit is provided in order to provide a ramp-shaped transition with adjustable steepness in the event of pressure changes.
  • the respective measurement result can be continuously monitored, for example on an oscilloscope.
  • a measured value memory connected to the measuring device and the monitoring unit for storing the torque measured values and preferably also the associated parameters relating to the angular position, pivoting direction, pivoting speed and Pressure is provided.
  • an output device such as a data viewing panel and / or a printer, can be connected to the measured value memory.
  • the measuring device continuously detects, for example, the bending of the measuring lever. If the control unit now continuously receives information from the control unit about the respectively desired angular position and swiveling speed at which the muscle strength is to be recorded, it can now advantageously be provided that the measuring device has a measured value output to which, for example, a measured value memory is connected is connected upstream gate circuit, which is connected to the control unit with a control input.
  • the monitoring unit thus controls the gate circuit in accordance with the selection of the respective parameters in order to supply the measured values to the measured value memory or another measured value output unit at the moment selected.
  • the seat and the backrest assigned to it are adjustable by means of hydraulic motors and these hydraulic motors are also connected with their control circuits to the central control unit, the position of the seat or the backrest detecting position transmitters and associated storage units for storage position values after a setting of the seat and the backrest are provided for a specific person, which position values can be read out by the control unit for setting the seat and backrest during a later measurement for this person.
  • a circuit design with separate components such as transducers, measuring amplifiers, memory circuits, A / D or D / A converters, comparators, sensors, control circuits, control amplifiers etc. can be provided to implement the central control unit and the monitoring unit;
  • an implementation with a common processor can also be considered here, which circles via corresponding coupling circuits with the individual settings 1 of the setting elements in the hydraulic system - to form the control unit - and with the individual measuring or encoder circuits to form the monitoring unit and also the torque measuring device - and to which an input unit, for example with a keyboard, with setting potentiometers etc., is assigned as a selection device.
  • a monitor and a printer can be connected to this processor.
  • FIG. 1 shows a schematic illustration of a device for recording the muscle strength during knee flexion and extension;
  • Figures 2a and 2b together a more detailed circuit diagram of such a device.
  • Fig. 3 is a block diagram of a Mahsauf construction, in which a processor is used to implement the monitoring unit and the central control unit;
  • 4 shows a schematic diagram ⁇ over ⁇ to illustrate a measurement process;
  • FIG. 5 shows a state diagram belonging to the diagram of FIG. 4 to further illustrate the sequence of the measurement process when using the device according to FIG. 2a;
  • FIGS. 6 and 7 two further diagrams corresponding to the diagrams of FIG. 5 to illustrate two further possible measuring procedures.
  • FIG. 1 generally shows, partly in a schematic side view, partly in a block diagram, a device for recording muscle strength during knee extension and / or flexion, with a backrest 1 at 2 and a seat on a frame (not shown) 3 are pivotally mounted at 4. Furthermore, a measuring lever 5 is pivotally mounted about a pivot axis 6 on this frame (not shown in more detail), this pivot axis 6 essentially extending through the moment pole when a subject (a subject) PR is bent or knee extended. To achieve this, the seat 3 and the backrest 1 are adjustable or pivotable, as will be explained in more detail below with reference to FIG. 2b.
  • the measuring lever 5 is assigned a hydraulic swivel drive device, generally designated 7, which comprises a hydraulic motor 8, for example in the form of a double-acting working cylinder, and an associated hydraulic system 9 with a pump 11 driven by an electric motor 10.
  • the hydraulic motor 8 drives a chain 12 via its piston rod, which runs over gears or sprockets (not shown), one of which is rigidly coupled to the measuring lever 5, so that it moves back and forth going to be able to pivot - corresponding to the back and forth movement of the working cylinder 8, cf. the swivel angle ⁇ measured from a horizontal H in Fig.l.
  • a cuff or fetlock 13 is also attached, which can be attached to the lower leg of the subject PR in the area directly above the ankle, the distance of this fetlock 13 from the pivot axis 6 is known, so that upon detection of the subject by the measuring lever 5 exerted torque M based on the familiarity of this distance or lever arm, conclusions about the force applied by the test person (or angular acceleration ⁇ ) are possible.
  • an angular position indicator 14 is provided which is coupled to the chain 12 in the present example and thus detects the angular position of the measuring lever 5 via the position of the chain 12.
  • a strain gauge full bridge 15 is also attached to the measuring lever 5 as a torque measuring device, which, when a torque is applied to the measuring lever 5 by the test subject, detects the bending of the measuring lever 5 caused thereby at a known distance from the axis 6.
  • This measuring device or strain gauge full bridge 15 is designed in a manner known per se
  • Converter-measuring amplifier circuit 16 and a gate circuit 17, the purpose of which will be explained in more detail below, are connected to a measured value output unit 18.
  • the measured values obtained can be output, for example, on a screen, not shown, a platter or a printer.
  • the angular position detector 14 is in a corresponding manner via a measuring line in the
  • Converter-measuring amplifier circuit 19 can be arranged, connected to a monitoring unit 20 which continuously monitors the angular position of the pivot lever 5.
  • the hydraulic system 9 contains a directional control valve 21 directly upstream of the working cylinder 8, with which the fluid connections of the working cylinder 8 can be exchanged, and thus for the selection of the direction of the Serves pivoting movement; accordingly, this directional control valve 21 is also referred to below as a directional selection directional control valve.
  • Another directional control valve 22 is used to select the operating mode for the respective measuring process, which is why this directional control valve is also referred to below as the operating mode selection directional control valve 22.
  • the pump 11 when this mode selection directional control valve 22 is in the cross position, delivers ö1 to the working cylinder 8, whereas in the parallel position of the operating mode selection directional control valve 22 shown in FIG. 1, there is a closed circuit in which furthermore, in addition to the directional selection directional control valve 21, a flow regulator 23 is arranged in order to fix the working speed of the working cylinder 8 and thus the swiveling speed of the measuring lever 5 via the adjustment of the flow quantity.
  • This flow regulator 23 operates in the other operating mode, when the operating mode selector valve 22 is in the cross position, on the oil drain side.
  • the pump 11 conveys the fluid (ö1) back into the tank 24.
  • an adjustable pressure control valve 25 is provided, which, as will be explained in more detail below, is electronically monitored, just like the flow rate regulator 23, and with which the fluid pressure in the hydraulic system can be adjusted.
  • a central control unit 26 with an associated selector 27 is provided, the components of the hydraulic system being indicated by dashed lines with the control lines Control unit 26 are connected, the respective settings can be made about the desired swivel speed ⁇ , the system pressure P, the measuring angle ⁇ and the operating mode via the selector 27.
  • the control unit 26 can be designed such that it automatically switches over the directional selection directional control valve 21 when the respective end positions of the working cylinder 8 or measuring lever 5 are reached carries out so that the measuring lever 5 automatically swings back again after swiveling forward and then swivels forward again etc.
  • Such a control can be implemented, for example, with the aid of limit switches (not shown in more detail), as is known per se to the person skilled in the art, so that no further explanation is required for this.
  • control line to the directional selection directional valve 21 is designated 28, the directional choice being indicated in the drawing with +/- (+ for stretching or pivoting clockwise, - for bending or pivoting counterclockwise).
  • the control line to the flow rate controller 23 is designated 29, the swivel or angular velocity to be set being indicated by ⁇ .
  • the operating mode selection directional valve 22 is connected to the control unit 26 via a control line 30, and the pressure regulating valve 25 is connected to the control unit 26 via a control line 31, the system pressure to be set being indicated by P.
  • control or switching line between the control unit 26 and the electric motor 10 is designated by 32, wherein the electric motor can be a contactor-operated motor with a bimetallic release. 1, behind the gate circuit 17, the measured value ⁇ obtained for the measuring torque M, corresponding to the angular acceleration caused by the test subject PR or the force exerted by it, is indicated.
  • the monitoring unit 20 can, for example, be provided with a comparator circuit, as indicated by dashed lines in FIG. 1 at 33, and if the measured angle ⁇ corresponds to the target angle ⁇ , the is transmitted by the control unit 26 via a connecting line 34, the gate circuit 17 is opened. To the. Output unit 18 can then be connected to a measured value memory 35, which is connected to the monitoring unit 20 (or to the control unit) with a second input, in order to always receive a related pair of measured values ⁇ / ⁇ .
  • the parameters entered in this way can be stored in a memory 43, which is only indicated schematically, wherein the stored parameters can be called up via a sequence controller 44, likewise indicated only schematically, of the central control unit 26 and fed to the control lines 28 to 31.
  • the hydraulic motor 8 is connected in a closed circuit in which the flow rate regulator 23 is also present, so that in this position the measuring lever 5 is not forced to pivot by the swivel drive device 7 , but a swiveling movement can only take place on the basis of the torque exerted by the test subject PR.
  • the swiveling movement can only take place at a fixed angular speed, corresponding to the setting of the flow rate regulator 23, and the torque exerted by the test subject can, as already explained, be detected with the aid of the measuring device 15, 16.
  • the pump 11 conveys fluid to the hydraulic motor 8, the flow rate controller 23 again causing a fixed setting of the swiveling speed ⁇ on the return side.
  • the test subject PR is forced to pivot the lower leg via the measuring lever 5, and when carrying out the torque measurement, the test subject must try to press against the moving measuring lever in this operating mode, and he can either try the measuring lever 5 to brake or swivel faster. In this case, too applied muscle force via the measuring device 15, 16 detected by detecting the bending of the measuring lever 5.
  • the test subject PR is strapped to the seat 3 or the backrest 1, but this is not illustrated in more detail in FIG. 1.
  • This strapping with belts ensures that the measuring torque can be compensated by a corresponding supporting torque, so that the rest of the subject's body remains essentially motionless during the measurement.
  • additional lateral handles can be provided, on which the test subject PR is supported with his hands, as indicated schematically at 45 in FIG. 2a.
  • FIGS. 2a and 2b represent a hydraulic and electrical circuit diagram in which the connection of the two partial figures FIGS. 2a and 2b at X or with corresponding figures indicated between brackets is indicated) again the seated and strapped test subject PR, who is seated on the seat, which is not shown in more detail, whose lower leg is firmly connected to a measuring lever 5, indicated schematically by dashed lines with its longitudinal axis.
  • This measuring lever 5 is driven, for example via a safety slip clutch 46, by a hydraulic motor 8 which is designed here as a rotator and which is connected upstream of the directional control directional control valve 21 which, in addition to the X and II positions, also has a zero or blocking position Has.
  • the angular position detector 14 works here with a measuring disc 47 firmly connected to the measuring lever 5 in order to detect the respective angular position of the measuring lever and via a converter 48, where the angle changes are converted into voltage changes, and an analog / digital converter 49 to one Monitoring unit (20 in Fig. 1) belonging to the comparator 33.
  • a digital value for a preselected measuring angle ⁇ is supplied by a central processor 50, which is provided for implementing the central control unit 26 illustrated in FIG. 1 and also preferably (at least partially) the monitoring unit 20.
  • a central processor 50 which is provided for implementing the central control unit 26 illustrated in FIG. 1 and also preferably (at least partially) the monitoring unit 20. It should be mentioned that in particular the The measured swivel angle ⁇ can be compared with the setpoint angle in a comparator circuit recorded in the processor 50, so that the separate comparator 33 according to FIG. 2 (and FIG. 1) can then be dispensed with.
  • the torque applied by the test subject PR or the applied muscle force is in turn detected by detecting the bending of the measuring lever 5 and thus the angular acceleration ⁇ by a measuring device with a strain gauge full bridge 15, to which a transducer 51 is assigned, by the length changes detected by the strain gauges convert it into an electrical resistance change.
  • An analog / digital converter 53 is connected downstream of this converter 51 via a measuring amplifier 52.
  • This A / D converter 53 is also connected with a control input to a measuring range circuit 54, which in turn can be connected, for example, to the processor 50 on the input side in order to be able to select the respective measuring range — optionally automatically.
  • the measured value for the angular acceleration ⁇ (and thus for the measuring torque) obtained at the output of the A / D converter 53 is fed to a comparator 55, which receives a minimum angular acceleration comparison value ⁇ e from the processor 50 at its second input.
  • This comparison value is selected before a measurement is carried out, in accordance with an expected measurement torque, and with the aid of the comparator 55 it is therefore possible to pass only those torque measurement values to an evaluation circuit, preferably in the processor 50, which are above the preselected one Comparative values are, with other waits, such torque measurements are not registered from the outset, but are eliminated, which occur when the test person with insufficient force against the measuring lever 5 - be it with an extension or with a flexion (Flexion) - presses.
  • the separate comparator 55 can be omitted if this torque comparison is carried out by the processor 50 itself, i.e. A corresponding comparator circuit is implemented in processor 50. For the rest, a corresponding comparator 55 is drawn in with dashed lines in FIG. 1.
  • the processor 50 also includes those shown in FIG. 1 illustrated at 18 Measured value output unit, and the processor 50, apart from its internal working memory, can be assigned an external memory corresponding to the memory 35 in FIG. 1, in which the torque measured values together with the desired parameters, in particular the associated angular position values ⁇ , can be saved. Similar to FIG. 1, a memory 43 can also be provided for the entered parameters, to which the processor 50 is connected via a corresponding line bus.
  • the control line 28 in turn leads from the processor 50 to the directional selection directional valve 21 and the control line 30 to the operating mode selection directional valve 22, which here, like the directional control valve 21, also has a zero or blocking position apart from the X and II positions.
  • the hydraulic system 9 is the one mentioned via a bridge circuit with four check valves 59, 60, 61 and 62
  • Mode selection directional valve 22 is connected to the directional selection directional valve 21.
  • the fluid flows back into the tank 24 via the flow rate regulator 23, the pump 11 conveying the fluid directly to the hydraulic motor 8 via the directional control valves 22 and 21.
  • the measuring lever 5 is in turn not forced to perform a pivoting movement by the hydraulic drive device; rather, pivoting takes place again only with a corresponding torque applied by the test subject PR.
  • the speed at which the measuring lever 5 is pivoted is determined by the flow rate controller 23 and the flow rate regulated by it.
  • the flow rate controller 23 is transmitted by the processor 50 via the control line 29 and a digital / analog converter 63 and a control amplifier 64, the setting value being shown in FIG at 65 further a converter is illustrated to the applied
  • a pressure measuring device 67 is connected via a measuring line, which is connected via an associated converter 68, in which the pressure changes are converted into current changes, as well as a measuring amplifier 69 and an analog / digital Converter 70 delivers corresponding pressure measurement values to a comparator 71.
  • the measured system pressure (actual value) is compared with a value derived from the desired pressure value supplied via the control line 31 to the pressure control valve 25 in order to effect a corresponding readjustment of the system pressure.
  • the measured system pressure is fed via line 72 to processor 50 for registration and storage, if desired.
  • the actual value / setpoint value comparison for the system pressure itself can also be carried out directly on the pressure control valve 25.
  • the pressure is set via the control line 31, in which a digital / analog converter 73 and a control amplifier 74 are accommodated.
  • a “measured” pressure setpoint is obtained via a connected analog / digital converter 75 and used for the actual value / setpoint comparison.
  • FIG. 2a the control line 32 to the electric motor 10 and the pump 11 coupled to it are again illustrated, corresponding to FIG. 1.
  • a hydraulic line 77 (FIG. 2b) leading to working cylinders for the seat and backrest adjustment is also connected to the pump main line 76, this part of the diagram being explained in more detail below.
  • ramp circuits 78 and 79 are provided in the control circuits for the flow rate controller 23 and the pressure control valve 25, which are designed in a conventional manner and over Control inputs are connected to processor 50.
  • These ramp circuits 78, 79 serve to provide an increase or decrease in the case of changes in the swiveling speed or in the pressure which deviate from a fixed or standard increase or decrease.
  • three different options are shown in FIG. 7 for setting the swivel speed (increase from zero to the desired angular speed), a standard increase being illustrated at 80, the duration of which is, for example, 50 ms.
  • a steeper, shorter or a less steep, longer ascent is shown, and these other inclines can be set with the aid of the ram circuits, here the ramp circuit 78, via the processor 50 or the input unit assigned to it. Similar to the ascent 80, 81 and 82, the slope of the descending ramp can of course also be set with the aid of the ramp circuits 78 and 79.
  • the backrest 1 and the seat 3 are assigned to working cylinders 83 and 84 for their adjustment.
  • These working cylinders 83, 84 are connected with their hydraulic connections, for example via check valves shown in the drawing, to associated control valves 85 and 86, respectively, which are connected to the already mentioned line 77, through which the pump delivers fluid.
  • the control cylinders 85, 86 are connected to the processor 50 via control lines 87, 88 so that they can be brought into the working position required for the desired seating position.
  • position transmitters 89, 90 are provided, for example interacting with the piston rods of the working cylinders 83, 84, via converters 91 and 92, respectively, in which the changes in travel are converted into changes in voltage, and analog / Digital converters 93 and 94 are connected to the processor 50 in order to supply the respective position measurement values. This can be done for a specific subject
  • Position measurement values are registered and stored when the seat 3 and the backrest 1 are adjusted for the first time, and these position measurement values can be used as setpoints from the memory, for example the memory 35 according to FIG. 2a, in later measurements which are carried out on the same subject , in the they were registered at the first position, read out and compared with the current actual position values, which are transmitted by the position transmitters 89, 90, in a comparator circuit provided in the processor 50 until the desired or desired position of the seat 3 and the Backrest 1 is reached. In this way, an automatic adjustment of the subject's sitting position can be achieved in later measurements.
  • FIG. 3 shows a greatly simplified diagram of the device described above, for better clarity, the subject PR acting on the measuring lever 5 and the hydraulic drive device 7 assigned to the measuring lever 5 being shown.
  • the processor 50 is shown, which is provided for the implementation of the monitoring unit 20 and the control unit 26 according to FIG. 1, and which can also be used to evaluate the measured values, i.e. via which the measurement values are registered and saved.
  • This processor 50 is associated with the measured value memory 35, an input unit 95, which forms the selector 27 with inputs corresponding to the inputs 36 to 42 according to FIG. 1 and further inputs, as well as a screen 96 and a printer 97.
  • 4 shows the swivel or angular velocity ⁇ over the swivel angle ⁇ , the measurement process being started at an initial angle ⁇ 0 in which the measuring lever was still at rest.
  • the measuring lever 5 is now pivoted by the hydraulic drive device 7, the target angular velocity ⁇ being reached after a rise time of, for example, 50 ms (standard rise, ie control via the ramp circuit 78 would be inoperative here).
  • a rise time for example, 50 ms (standard rise, ie control via the ramp circuit 78 would be inoperative here).
  • the torque applied by the test subject should now be recorded.
  • the processor is preferably set up to determine several, for example two, setting angles ⁇ 1, ⁇ 2 according to this setting angle ⁇ e, the respective torque being recorded at these two angles ⁇ 1, ⁇ 2 is interpolated between the two measured torque values thus obtained in order to obtain a torque value at the setting angle ⁇ e.
  • a linear interpolation can be carried out, for example.
  • a series of measurements of nineteen measurements each is taken at angle ⁇ 1 as well as angle ⁇ 2 within a period of, for example, 40 ms, ie nineteen measurements with a frequency of 25 Hz, that is, a measurement is carried out every 2.2 ms, after which an arithmetic averaging over these nineteen measurements is carried out in a series of measurements in order to obtain one or the other measured torque value at the angle ⁇ 1 or ⁇ 2.
  • the distance between the two measurements, corresponding to the distance between the angles ⁇ 1 and ⁇ 2 can vary, for example, between 40 ms and 3 min.
  • the start of a measuring process is illustrated at 98, and at 99 the angular velocity ⁇ (target angular velocity) selected - via the selection device 27 according to FIG. 1 or input unit 95 according to FIG. 3 - is determined.
  • the pressure is then selected at 100 and the ramp for the pressure setting (ramp circuit 79 in FIG. 2a) is determined at 101.
  • the electric motor is then turned on to drive the pump.
  • the operating mode is then selected at 103 (setting of the directional control valve 22), and the angular position in which the measuring lever 5 is located is measured at 104.
  • An initial angle for the actual measuring process (initial angle ⁇ 0 in FIG.
  • the directional selection directional control valve is now brought into the X or II position, depending on whether an extension or flexion is desired.
  • a torque measurement or measurement of the angular acceleration ⁇
  • the mode selection directional control valve 22 is brought into the zero position at 113, after which this directional control valve is manually set to the position desired in accordance with the selected mode of operation, whereby the return to point 103 of the flow chart is made is.
  • the two measurements for the torque are each a series of measurements with 19 measurements in which an arithmetic averaging is carried out in order to obtain the respective measured torque value ⁇ 1 or ⁇ 2, and these measured values are in the Evaluation unit or used in the processor, for example, by linear interpolation or by another algorithm to obtain an average measured torque value.
  • the message is transmitted to the subject at 117 that the extension (flexion) is now to be ended.
  • the processor then brings the directional control directional control valve 21 into the zero position, after which there is a pause at 119, preferably with a predeterminable duration.
  • the desired number n (cf. FIG.
  • the engine is then switched off at 122, after which the ramp circuit (for the pressure regulator control circuit) is deactivated at 123; finally at 124 the system pressure is zeroed, at 125 the flow controller is reset to the default setting, and at 126 the mode selector valve 22 is reset.
  • the registered measured values can then be stored at 127 and / or displayed on the screen and / or printed out. Finally, the end of the measuring process is illustrated at 128.
  • FIG. 6 illustrates a procedure for the detection of the torque that is modified compared to FIG. 4.
  • the measuring lever 5 is first brought to a first predetermined angular or pivoting speed ⁇ 1, and at a predetermined point in time or in a predetermined angular position ⁇ T, a switch is made to a higher angular speed ⁇ 2, which follows a certain rise time, for example in accordance with the setting of the ramp circuit 78, is reached at a swivel angle ⁇ S.
  • the measurement angle ⁇ e can follow, at which the torque is detected.
  • This change in speed can be carried out both with a forward swivel (extension) and with a backward swivel (flexion), similar to the measuring process explained above with reference to FIG. 4 or the measuring process to be explained below according to FIG. 7 for forward swiveling as well as for backward swiveling of the measuring lever can take place.
  • Fig. 6 is then a dashed lines a modification of the measuring process with a change of
  • Swiveling speed illustrated, in which case a higher speed is first used, from which the brake suddenly decelerates to a low angular speed in order to carry out the torque measurement immediately thereafter.
  • Fig. 7 a procedure is illustrated, in which essentially only a constant angular velocity ⁇ is provided, but at which a sudden, brief reversal of direction in the pivoting movement takes place, the torque being detected in the region of this reversal of direction, in order to also here the possibility of a Exclude adjustment on the part of the subject.
  • the pivoting movement carried out up to that point is switched off, and after a drop, the inclination of which can be adjusted with the ramp circuit 78, the movement is reversed until the angle ⁇ 3, which lies before the angle ⁇ 4 , is achieved, in which the direction of movement is changed again - by switching the directional control valve 21 - so that after a fall and a new rise time, the original direction of movement is given again, as illustrated by arrows in FIG. 7.
  • Torque measurement can be made during the return movement in the range between ⁇ 4 and ⁇ 3 or after the second switchover with the new swiveling movement in the original direction between ⁇ 3 and ⁇ 4 Torque measurement can be made.
  • the distance between the angular positions ⁇ 4 and ⁇ 3 can be, for example, 120 ms.
  • the rise or fall times can again be, for example, 50 ms or more or less, depending on the setting of the ramp circuit 78.
  • a fixed sequence control 44 assigned to the control unit 26 this can be carried out in a manner known per se to the person skilled in the art, e.g. with clock pulse generator, timers, counters, gate circuits and converters or converters, depending on the desired sequence of a measuring process (e.g. according to Fig. 4 or 6 or 7). It is also possible to provide several selectable sequential controls 44 in parallel next to one another.
  • the central control unit 26 is implemented with a processor, such as the processor 50 according to FIG. 2, the (respective) sequence control can be implemented, for example, by a so-called PROM or EPROM circuit. Furthermore, a subdivision of the block 50 with dashed lines indicates in FIG. 2a that the processor 50 fulfills the tasks of the central control unit 26, the monitoring unit 20 and also the measured value output circuit 17, 18 according to FIG. 1.
  • FIG. 2a it is also schematically illustrated at 129 that an actual value / setpoint value comparison is carried out on the flow rate controller 23 in order to carry out continuous readjustment, even when the pressure or load changes.
  • Such flow controllers with associated comparison circuit are commercially available; for example, the flow control valve has been used in experiments
  • Rexroth type 2FRE6B-1X / 10QMV with associated control loop Rexroth type VT5010 S20 has proven to be advantageous.
  • a flow rate actual value / setpoint value comparison can, however, also be carried out by means of a comparison circuit implemented in the processor 50, as indicated schematically at 130 in FIG. 2a with dashed lines.
  • a commercially available proportional control valve with control circuit such as the pressure control valve Rexroth type DBEM10-30 / 200Y with control circuit VT2000 S20, can also be used as the pressure control valve 25.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Rheumatology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Tools (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

Un agencement utilisé pour déterminer la force musculaire lors de l'extension et/ou de la flexion du genou comprend un siège réglable (9) et un levier pivotant de mesure (5) à connecter avec la jambe, subordonné à un agencement hydraulique d'entraînement par pivotement (7) à moteur hydraulique (8), à un régulateur de débit (23) pour régler la vitesse de pivotement, à un régulateur ajustable de pression (25), à un distributeur (21) de sélection de la direction de pivotement et à un distributeur (22) de sélection du mode de fonctionnement. Un dispositif de mesure (15) à bande de mesure de l'extension détermine la flexion du levier de mesure et par conséquent un moment de torsion exercé sur le levier de mesure lors de l'extension et/ou de la flexion du genou, et un détecteur de position angulaire (14) détermine la position angulaire du levier de mesure (5). Une unité centrale de commande (26; 50) est reliée au régulateur de débit (23), au régulateur de pression (25) et aux distributeurs (22, 21) pour permettre la sélection du mode de fonctionnement et de la direction de pivotement. Un dispositif sélecteur (27; 95) est relié à cette unité de commande (26; 50) pour ajuster le régulateur de débit, le régulateur de pression et les distributeurs. En outre, une unité de contrôle (20; 50) est reliée à cette unité de commande (26; 50), au détecteur de la position angulaire (14) et au dispositif de mesure (15) pour contrôler la position angulaire et la vitesse de pivotement du levier de mesure (5), afin de déterminer automatiquement la flexion du levier de mesure (5) lorsque celui-ci présente un angle prédéterminé de pivotement et/ou une vitesse prédéterminée de pivotement.
PCT/AT1986/000043 1985-05-24 1986-05-23 Agencement de determination de la force musculaire WO1986006947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT158285A AT397033B (de) 1985-05-24 1985-05-24 Einrichtung zur erfassung der muskelkraft
ATA1582/85 1985-05-24

Publications (1)

Publication Number Publication Date
WO1986006947A1 true WO1986006947A1 (fr) 1986-12-04

Family

ID=3516530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1986/000043 WO1986006947A1 (fr) 1985-05-24 1986-05-23 Agencement de determination de la force musculaire

Country Status (5)

Country Link
EP (1) EP0263816A1 (fr)
JP (1) JPS62502873A (fr)
AT (1) AT397033B (fr)
AU (1) AU5952386A (fr)
WO (1) WO1986006947A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705493A1 (de) * 1987-01-22 1988-08-04 Kern Guenter Medizinisches diagnosegeraet
FR2619723A1 (fr) * 1987-08-31 1989-03-03 Angelloz Louis Appareil d'exercices physiques a modes multiples et procede de commande d'un tel appareil
DE3744781C2 (en) * 1987-01-22 1990-10-25 Guenter 8242 Bischofswiesen De Kern Medical diagnostic appts. for knee, hip and shoulder joints etc.
WO2003094732A1 (fr) * 2002-05-07 2003-11-20 Monash University Evaluation de la susceptiblite aux lesions musculaires
WO2005000424A3 (fr) * 2003-06-14 2005-03-24 Keiser Corp Systeme d'evaluation de la puissance musculaire
US8052584B2 (en) 2004-04-22 2011-11-08 Keiser Corporation System and method for determining a resistance level for training a muscle group for maximum power generation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425256A1 (de) * 1994-07-16 1996-01-18 Alfred Dr Med Thilmann Vorrichtung und Verfahren zur Messung der Muskel- und Kraftantwort bei Bewegung eines Gelenks
DE19615392C1 (de) * 1996-04-18 1998-01-15 Bavaria Patente & Lizenzen Trainings-, Diagnose- und Rehabilitationsgerät nach Art eines Fahrradergometers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465592A (en) * 1965-09-14 1969-09-09 James J Perrine Isokinetic exercise process and apparatus
US3998100A (en) * 1975-04-21 1976-12-21 Pizatella Robert F Exercise process and apparatus
WO1980000124A1 (fr) * 1978-07-03 1980-02-07 R Polhemus Machine pour exercice commandee par retroaction

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063726A (en) * 1976-04-26 1977-12-20 Wilson Robert J Electronically controlled hydraulic exercising system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465592A (en) * 1965-09-14 1969-09-09 James J Perrine Isokinetic exercise process and apparatus
US3998100A (en) * 1975-04-21 1976-12-21 Pizatella Robert F Exercise process and apparatus
WO1980000124A1 (fr) * 1978-07-03 1980-02-07 R Polhemus Machine pour exercice commandee par retroaction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Medical and Biomedical Engineering and Computing, Volume 21, No 6, November 1983 Stevenage (GB) PRONK et al.: "Apparatus for Measuring the Functional Capacity o the knee Extensors and Flexors", pages 764-767 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705493A1 (de) * 1987-01-22 1988-08-04 Kern Guenter Medizinisches diagnosegeraet
EP0275956A3 (fr) * 1987-01-22 1989-01-04 Günter Kern Appareil de diagnostic médical
DE3744781C2 (en) * 1987-01-22 1990-10-25 Guenter 8242 Bischofswiesen De Kern Medical diagnostic appts. for knee, hip and shoulder joints etc.
FR2619723A1 (fr) * 1987-08-31 1989-03-03 Angelloz Louis Appareil d'exercices physiques a modes multiples et procede de commande d'un tel appareil
WO1989001769A1 (fr) * 1987-08-31 1989-03-09 Myosoft S.A.R.L. Appareil d'exercices physiques a modes multiples et procede de commande d'un tel appareil
WO2003094732A1 (fr) * 2002-05-07 2003-11-20 Monash University Evaluation de la susceptiblite aux lesions musculaires
WO2005000424A3 (fr) * 2003-06-14 2005-03-24 Keiser Corp Systeme d'evaluation de la puissance musculaire
US8523789B2 (en) 2003-06-14 2013-09-03 Keiser Corporation System for testing muscular power
US8052584B2 (en) 2004-04-22 2011-11-08 Keiser Corporation System and method for determining a resistance level for training a muscle group for maximum power generation

Also Published As

Publication number Publication date
ATA158285A (de) 1986-08-15
JPS62502873A (ja) 1987-11-19
EP0263816A1 (fr) 1988-04-20
AU5952386A (en) 1986-12-24
AT397033B (de) 1994-01-25

Similar Documents

Publication Publication Date Title
EP2637751B1 (fr) Ergomètre à tapis roulant comportant des unités de traction et de mesure adaptées pour des applications thérapeutiques, la rééducation et l'entraînement à la marche
EP2160168B1 (fr) Procédé et dispositif d'entraînement et/ou d'analyse de l'appareil moteur d'un utilisateur
DE102007053119A1 (de) Verfahren und Vorrichtung zum Einstellen eines Sitzes sowie Sitz
DE602004012959T2 (de) Gerät, um die Höhe eines Gewichts sowie eine auf dieses Gewicht wirkende Entlastungskraft zu regulieren
DE69636501T2 (de) Einrichtung zur messung von mindestens zwei pneumatischen lungenparametern und messverfahren dazu
EP1961283A1 (fr) Appareil de traitement des sols
DE102008023573A1 (de) Beinbewegungsschiene zur repetitiven Bewegung des Knie- und Hüftgelenks mit Assistenzfunktion bei aktiver Nutzung
DE3226659C2 (de) Drillmaschine
DE102015210529A1 (de) Flexible Magnetresonanzspulenvorrichtung
DE10000135A1 (de) Bewegungsgerät mit zwei bewegbaren Betätigungselementen
DE2349212A1 (de) Trainingsgeraet
WO1986006947A1 (fr) Agencement de determination de la force musculaire
DE202007008887U1 (de) Vorrichtung für ein Training und/oder eine Analyse des Bewegungsapparats eines Benutzers
WO1989011824A1 (fr) Appareil de diagnostic medical
DE102007046895A1 (de) Verfahren zur objektiven Bestimmung der körperlichen Konstitution einer Testperson sowie Testgerät hierzu
DE102006052502A1 (de) Krafttrainingsgerät
DE19622564C2 (de) Verfahren zur Steuerung einer Streckliege mit Rückkopplung der Muskelaktivität
DE69304679T2 (de) Die körperhaltung in allen drei raumebenen anpassende vorrichtung zur modifikation der myotonien
DE4431586A1 (de) Fahrersitzanordnung für ein Kraftfahrzeug
DE102005051960B3 (de) Verfahren und Einrichtung zur Erfassung von Bewegungen einer Person, deren Übertragung und Darstellung
WO2023152213A2 (fr) Système de maintien pour un opérateur et procédé de maintien d'un opérateur
EP0700694A1 (fr) Méthode de diagnostic et d'entraînement
DE10021521C2 (de) Vorrichtung zur veränderbaren Verringerung des von einer Person auf den Boden ausgeübten Gewichts
DE10312042B4 (de) Trainingsgerät mit fortlaufend rotatorisch bewegbaren, miteinander verbundenen Betätigungselementen
EP0826336A2 (fr) Dispositif pour déterminer l'innervation du plancher pelvien et du sphincter anal

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BB BG BR DK FI HU JP KP KR LK MC MG MW NO RO SD SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CF CG CH CM DE FR GA GB IT LU ML MR NL SE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: 1986903106

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1986903106

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1986903106

Country of ref document: EP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载