CN202126738U - Device for automatically reminding passengers in bus of traffic light conversion - Google Patents

Abstract

The utility model provides a device for automatically reminding passengers of traffic light switching in a bus, which belongs to the field of traffic control. The device consists of two CCD cameras, an image acquisition card, a single-chip microcomputer, and a voice prompt device. For the image of the traffic light ahead, the second CCD camera collects the image of the driving condition of the vehicle in front, and the image acquisition card performs color and character recognition on the traffic light image obtained by the first CCD camera, and uses the recognition information to judge the transition time of the traffic light through the single-chip microcomputer, and starts the voice prompt in time device, or through the ultrasonic sensor distance measurement combined with the image acquisition card to perform frame difference processing on the video captured by the second CCD camera to determine the driving status of the vehicle in front, and to judge the traffic light transition time through the single-chip microcomputer, and start the voice prompt device in time to remind the passengers in the car to help Good stand still.

Description

A device for automatically reminding passengers of traffic light switching in a bus

technical field

The utility model provides a device for automatically reminding passengers of traffic light switching in a bus, which belongs to the field of traffic control. the

Background technique

When the bus passes through the intersection of traffic lights, it often encounters the problem of changing traffic lights. When the traffic light changes from red to green, the bus must accelerate. When the traffic light changes from green to red, the bus must brake. In these two processes, the passengers standing in the bus will be unstable or fall due to the acceleration or braking of the bus. There is a voice prompt function for passengers, but there is a lack of corresponding voice prompt function when the traffic light changes. It is easy to cause the bus to brake or accelerate when the traffic light changes. In order to cause unnecessary injuries, a device for automatically reminding passengers of traffic light conversion in the bus is proposed here, which can effectively remind the passengers in the bus in time when encountering the problem of traffic light conversion, so that the passengers can stand upright and have a strong sense of security. practicality. the

Contents of the invention

In view of the above, the main purpose of the present utility model is to provide a device for automatically reminding the traffic light switching in the bus, which can timely inform the passengers in the bus of the traffic light switching information through the voice prompt device, so that the passengers in the bus can help them stand firmly and avoid Passengers cause unnecessary injuries and are more practical. the

In order to achieve the above-mentioned purpose, the technical scheme that the utility model invention takes is: this device is made up of two CCD cameras, image acquisition card, ultrasonic sensor, single-chip microcomputer, voice prompting device, wherein two CCD cameras are connected with image acquisition card, image acquisition The card and the ultrasonic sensor are connected with the single-chip microcomputer, and the single-chip computer is connected with the voice prompt device. The first CCD camera is placed on the upper right side of the front glass in the bus to collect the traffic light information images ahead in real time, and the second CCD camera is placed in the middle of the front glass in the bus just below the middle to collect the driving status information images of the vehicles ahead in real time. The two channels of information are sent to the image acquisition card, and the image acquisition card performs color and character recognition processing on the traffic light information image acquired by the first CCD camera, and uses the color and character recognition to judge the transition time of the traffic light through the single-chip microcomputer, or through the ultrasonic sensor to measure Combined with the image acquisition card, the frame difference method is used to process the video collected by the second CCD camera to determine the driving status of the vehicle in front and send it to the single-chip microcomputer to judge the transition time of the traffic light, and use the judgment result to judge whether the single-chip microcomputer starts the voice prompt device to remind the passengers in the bus, effectively avoiding The passengers in the bus suffered from unsteady standing and falling. In order to facilitate the timeliness or whether it is the time of traffic light transition, among the two CCD cameras, the CCD camera placed at the upper right position of the front glass in the bus should be kept horizontal and slightly upward, and the other CCD camera should be kept horizontal and slightly downward. The purpose is to effectively obtain the traffic light information and the driving condition information of the vehicle directly ahead. If the information image of the traffic light cannot be obtained due to the occlusion of the vehicle in front, the traffic light transition time can also be determined based on the driving status of the vehicle directly in front acquired by the second CCD camera combined with ultrasonic ranging. Easy to measure distance. the

The utility model uses the image acquisition card to process the traffic status information of the vehicles in front and the traffic light information images captured by two CCD cameras in real time. One CCD camera judges the traffic light conversion time according to the traffic light information images, and the other one collects the front traffic light information images according to another CCD camera. Vehicle traffic status information and ultrasonic sensor vehicle distance can realize the judgment of traffic light transition time. As long as one of the two conditions meets the conditions, the traffic light transition time can be judged, so as to remind passengers in the bus to hold up and stand firmly through the voice prompt device in time. It is practical to avoid accidents. the

Description of drawings

Fig. 1 is the system schematic diagram of the utility model. The system is composed of a CCD camera (1) (2), an image acquisition card (3), an ultrasonic sensor (4), a single-chip microcomputer (5), and a voice prompting device (6). the

Fig. 2 is the working flow diagram of the first road judging the traffic light switching time in the utility model. It is mainly composed of CCD camera (1), image acquisition card (3), acquisition of traffic light information image (7), color recognition (8), image grayscale (9), image binarization (10), morphological expansion, It is composed of erosion, thinning processing (11), character normalization (12), character extraction (13), single-chip microcomputer (5), and voice prompting device (6). the

Fig. 3 is a work flow chart of the second road judging the traffic light conversion time in the present invention. It is mainly composed of a CCD camera (2), an image acquisition card (3), a frame difference method to determine the driving change of the vehicle in front (14), an ultrasonic sensor (4), a single-chip microcomputer (5), and a voice prompt device (6). the

Detailed ways

Below in conjunction with accompanying drawing, the utility model invention is further described. the

Fig. 2 is the work flow diagram of the first road judging traffic light conversion moment in the utility model, as shown in Fig. 2, its concrete steps are as follows:

Step 1 The CCD camera (1) collects video images in real time and sends them to the image acquisition card (3) to obtain traffic light information images (7);

Step 2 Carry out traffic light color recognition (8) on the traffic light information image (7), and determine the current state of the traffic light;

Step 3 Carry out image grayscale (9) on the traffic light information image (7) at the same time, to facilitate the extraction of time characters displayed under the current traffic light state;

Step 4 Perform image binarization (10) processing on the grayscaled image to obtain a binary image, and then perform morphological expansion, erosion, and thinning processing (11) on the binarized image to make the edge of the extracted image approximately close to original target;

Step 5 Perform character normalization (12) processing on the processed image to realize character extraction (13), compare it with standard digital characters, and realize the judgment of traffic light display time, so that the traffic light switching time can be known in time. the

Step 6 will know the traffic light transition time, utilize the single-chip microcomputer (5) to start the voice prompt device (6) in time, remind the passengers in the bus to hold up and stand firmly. the

Fig. 3 is the work flow diagram of the second road judging traffic light conversion moment in the utility model, as shown in Fig. 3, its concrete steps are as follows:

Step 1 CCD camera (2) collects video images in real time;

Step 2 Use the frame difference method in the image acquisition card (3) to determine the driving change of the vehicle in front (14), and send the result to the single-chip microcomputer (5);

Step 3 At the same time, the ultrasonic sensor (5) is used to measure the distance of the vehicle in front and send it to the single-chip microcomputer (5), and combine the two measurement results to finally determine whether the vehicle in front stops or accelerates, and then learns whether the traffic lights in front are switched;

Step 4: After knowing the transition time of the traffic lights ahead, start the voice prompt device (6) through the single chip microcomputer (5) to remind the passengers in the bus to stand firmly and hold them up. the

Claims (2)

1. remind the device of passenger's traffic lights conversion in the bus automatically; Its design feature is: this device is made up of CCD camera (1) (2), image pick-up card (3), ultrasonic sensor (4), single-chip microcomputer (5), sound prompt device (6); Wherein CCD camera (1) (2) links to each other with image pick-up card (3); Image pick-up card (3) links to each other with single-chip microcomputer (5) with ultrasonic sensor (4), and single-chip microcomputer (5) links to each other with sound prompt device (6).

2. according to claims 1; Automatically remind the device of passenger's traffic lights conversion in described a kind of bus; It is characterized in that: first CCD camera (1) is positioned in the bus the upper right side of the place ahead glass; Gather the place ahead traffic lights frame in real time, second CCD camera (2) is positioned over position under the interior glass centre, the place ahead of bus, gathers front vehicles travel conditions frame in real time; Two-way information is sent into image pick-up card (3); The traffic lights frame that image pick-up card (3) obtains first CCD camera (1) carries out color and character recognition processing, utilizes color and character recognition judgement traffic lights to change the moment through single-chip microcomputer (5), or through ultrasonic sensor (4) range finding combining image capture card (3) second CCD camera (2) collection video is carried out frame difference method processing judgement front vehicles travel conditions and send into single-chip microcomputer (5) the judgement traffic lights conversion moment; According to result of determination, single-chip microcomputer (5) judges whether start sound prompt device (6).

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