JP2008170389A - Vibration and temperature measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration and temperature measuring instrument capable of correcting an inclination of a probe by knowing the beginning of inclination in the probe during measurement, and capable of accurately measuring vibrations and a temperature. <P>SOLUTION: A level 30 is visibly provided from the outside in the probe 1, in the vibration and temperature-measuring instrument of a measuring object with a vibration sensor 6 and a temperature sensor 4 built in the probe 1, with one end of a vibration detecting stylus 7 contact-pressed onto a measuring object of the vibration sensor 6 that is projected from the probe 1, with one end of a thermocouple 5 contact-pressed onto the object to be measured of the temperature sensor 4 projected from the probe 1; and with one end of the vibration detecting stylus 7 of the vibration sensor 6 and one end of the thermocouple 5 of the temperature sensor 4 contact-pressed onto the measuring object, to thereby measure the vibration and the temperature of the measuring object. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention detects the vibration and temperature associated with the operation of compressors, turbines, pumps, various rotating machines such as bearings and gears, and valves and steam traps through which fluid passes, and confirms the quality of the operation. The present invention relates to a vibration and temperature measuring instrument used for the measurement.

  A lot of various rotary machines and valves are installed in production sites in factories and plants, and these machines and valves are used to obtain the maximum production volume with the minimum energy consumption and maintain the highest production quality. The operating status is checked constantly or periodically. As a conventional vibration and temperature measuring instrument, for example, there is one disclosed in JP-A-7-5027. This is because the vibration sensor and the temperature sensor are built in the probe, and one end of the vibration sensor and the temperature sensor that is pressed against the object to be measured is protruded from the probe. The vibration and temperature of the object to be measured are measured by pressing against the object.

In the conventional apparatus, if the probe is tilted during measurement, the pressing angle of the vibration sensor and the temperature sensor against the measurement object changes, so that vibration and temperature cannot be measured accurately. Therefore, it is necessary to hold the probe so that it does not tilt during measurement. However, since it is not known whether the probe has started to tilt, there is a problem that it is not possible to determine whether vibration and temperature can be measured accurately.
Japanese Unexamined Patent Publication No. 7-5027

  The problem to be solved is to provide a vibration and temperature measuring instrument that can correct the tilt of the probe so that it can be seen that the probe has started to tilt during measurement, and can accurately measure vibration and temperature.

  In the present invention, the vibration sensor and the temperature sensor are built in the probe, and one end of the vibration sensor and the temperature sensor pressed against the object to be measured is protruded from the probe, respectively, and one end of each of the vibration sensor and the temperature sensor is measured. An apparatus for measuring vibration and temperature of an object to be measured by pressing against the object is characterized in that a level is provided on the probe so as to be visible from the outside.

In the present invention, by providing a level indicator on the probe so that the probe can be visually recognized from outside, the level indicator displays that the probe has started to tilt during measurement. Therefore, by correcting the tilt, vibration and temperature can be corrected accurately. This produces an excellent effect of being able to measure.

  The vibration and temperature measuring instrument of the present invention is provided with a level on the probe so as to be visible from the outside. Therefore, when the probe starts to tilt during measurement, the level indicator displays that the tilt has started to be visible. Therefore, vibration and temperature can be measured accurately by correcting the tilt.

  An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 to 3). FIG. 1 shows a front view (b) and a bottom view (b) of the vibration and temperature measuring instrument of the present invention. The protective tube 3 fixed by screws 2a and 2b protrudes from the upper end of the probe 1, the upper end of the thermocouple 5 of the temperature sensor 4 slightly protrudes from the upper end of the protective tube 3, and the vibration of the vibration sensor 6 from the center of the thermocouple 5 The tip of the detection needle 7 protrudes slightly. A display unit 8 for displaying measured values of vibration and temperature is provided at a substantially central portion of the probe 1. The display unit 8 displays the measurement value as a digital 8a and a bar graph 8b. A key 9 for shifting and displaying a power source and a desired measurement result is provided below the display unit 8. An earphone 10 is connected to the side surface of the probe 1. A level 30 is provided at the lower end of the probe 1 so as to be visible from the outside.

  FIG. 2 shows a cross section of only the upper part of the probe 1. A small-diameter male screw is formed below the vibration detection needle 7, and a vibration transmission plate 11 formed with a female screw is screw-coupled thereto, and the upper surface of the vibration transmission plate 11 is in contact with the lower surface of the large-diameter portion. An electrode plate 12, a piezoelectric element 13, an electrode plate 14, and a weight 15 are sequentially inserted below the vibration transmission plate 11, and are brought into contact with each other by a nut 16 and fixed to the vibration detection needle 7. The vibration detection needle 7 and the vibration transmission plate 11 are made of stainless steel, and the weight 15 is made of zirconia ceramic. A unit of the vibration sensor 6 is formed from the vibration detection needle 7, the vibration transmission plate 11, the electrode plate 12, the piezoelectric element 13, the electrode plate 14, and the weight 15. The upper surface of the vibration transmission plate 11 and the lower surface of the weight 15 are sandwiched between switch fittings 17 fixed to the probe 1. The switch fitting 17 is formed of an upper wall, two side walls on both sides extending downward from the upper wall, and a bifurcated spring portion extending further downward from the opposite end of the upper wall. Fixed to. Further, the vibration sensor 6 is biased upward by the spring portion, and the upper surface of the vibration transmitting plate 11 is in contact with the lower surface of the upper wall. Further, the upper wall is provided with a cut from the front side, and the vibration detection needle 7 is inserted from the front side. Conductive wires (not shown) from the electrode plates 12 and 14 are connected to terminals 19 and 20 of the signal processing circuit 18.

  The thermocouple 5 is formed in a disc-like shape having a hole in the center at the top and bottom of the bent portions 5a and 5b, and in the center and a contact plate 21 having a shape bent downward in the center. It is formed by welding and fixing a disk-shaped protective plate 22 having holes. The lower portions of the thin plates 5a and 5b of the thermocouple 5 are wound into a large-diameter hole in the lower portion of the heat insulating tube 23 and fixed by a ring 24 press-fitted into the large-diameter hole of the heat insulating tube 23. A slight gap is provided between the lower surface of the protection plate 22 of the thermocouple 5 and the upper surface of the heat insulating tube 23. Two windows 25 a and 25 b are provided on both sides of the heat insulation pipe 23. The protective tube 3 is inserted outside the heat insulating tube 23. A unit of the temperature sensor 4 is formed from the thermocouple 5, the heat insulating tube 23, the ring 24 and the protective tube 3. The thin plates 5a and 5b of the thermocouple 5 are connected to terminals 27 and 28 of the signal processing circuit 18 via thermocouple contacts 26a and 26b, respectively. The tip of the vibration detection needle 7 protrudes slightly through the ring 24, the heat insulating tube 23 and the thermocouple 5.

  The block diagram of FIG. 3 shows the electrical circuit of the vibration and temperature measurement indicator of the present invention. The vibration sensor 6 built in the probe 1 shown in FIG. 2 is connected to the amplification circuit 31 of the signal processing circuit 18 built in the probe 1, connected to the detection circuit 32, and further through the central processing circuit 33, the probe 1. It is connected to the display unit 8 provided in FIG. The amplifier circuit 31 is connected to the earphone 10 connected to the probe 1. The temperature sensor 4 built in the probe 1 shown in FIG. 2 is connected to the amplifier circuit 34 of the signal processing circuit 18, and is connected to the display unit 8 through the central processing circuit 33.

  When measuring the operating state of the object to be measured, the probe 1 is grasped by hand, the tip of the vibration detection needle 7 is pressed against the surface of the object to be measured, and the elastic force of the spring portion of the switch fitting 17 is resisted. By pressing the thermocouple 5 to the upper surface of the contact plate 21, the thermocouple 5 is also pressed against the object to be measured. Further, the thin plates 5 a and 5 b of the thermocouple 5 are bent to push the tip of the vibration detection needle 7 and the upper surface of the contact plate 21 to the upper surface of the protective tube 3. Mechanical vibration of the object to be measured is transmitted to the vibration transmitting plate 11 through the vibration detecting needle 7 and acts on the piezoelectric element 13 as pressure fluctuation. In response to this, voltage fluctuations occur in the piezoelectric element 13. This voltage fluctuation is sent from the electrode plates 12 and 14 to the terminals 19 and 20 of the signal processing circuit 18 through the conductive wires, amplified by the amplifier circuit 31 and sent to the earphone 10 to generate vibration sound. Further, the signal is sent from the amplifier circuit 31 to the central processing circuit 33 through the detection circuit 32, and the average value, the peak value, etc. are displayed on the display unit 8 as a digital 8a or a bar graph 8b. On the other hand, the temperature signal of the object to be measured is detected by the thermocouple 5 and sent to the terminals 27 and 28 of the signal processing circuit 18 through the thermocouple contacts 26a and 26b, and sent to the central processing circuit 33 through the amplifier circuit 34. , Digital 8a is displayed on the display unit 8. When the probe 1 starts to tilt during measurement, the level 30 displays that the tilt has started to be visible, so that the vibration and temperature can be accurately measured by correcting the tilt.

It is the front view (b) and bottom view (b) which show the example of the vibration and temperature measurement indicator of the present invention. It is sectional drawing of only the upper part of FIG. It is a block diagram of the electric circuit of the Example of the vibration and temperature measurement indicator of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Probe 4 Temperature sensor 5 Thermocouple 6 Vibration sensor 7 Vibration detection needle 13 Piezoelectric element 18 Signal processing circuit 30 Level 31 and 34 Amplification circuit 32 Detection circuit 33 Central processing circuit

Claims (1)

A vibration sensor and a temperature sensor are built in the probe, one end of the vibration sensor and the temperature sensor pressed against the object to be measured is protruded from the probe, and one end of each of the vibration sensor and the temperature sensor is pushed to the object to be measured. What measures the vibration and temperature of a to-be-measured object by touching, The vibration and temperature measuring device which provided the level level to the probe so that visual recognition was possible from the outside.

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