CN102956108A - Visible light type road speed measurement system - Google Patents

Abstract

The present invention relates to a visible light highway speed measurement system, which includes an optical signal generating device, an optical signal receiving device and a signal processing device, the optical signal generating device is used to provide a light source irradiated on the vehicle; the optical signal receiving device is used for for receiving the light signal reflected from the vehicle, converting the light signal into an electrical signal and sending it to the signal processing device; the signal processing device is used for calculating the speed of the vehicle according to the electrical signal. Visible light road speed measurement system of the present invention can directly use the existing traffic signal lights through the cooperation between the above-mentioned various devices, and can realize the speed measurement of the vehicle, which solves the problems of the existing contact speed measurement device and non-contact speed measurement device. However, it has simple structure, easy maintenance, low cost and reliable performance.

Description

Visible light road speed measurement system

technical field

The invention relates to a speed measuring system, in particular to a visible light highway speed measuring system for measuring the speed of vehicles.

Background technique

At present, there are mainly two types of motor vehicle speed measuring devices in my country, which are contact speed measuring devices and non-contact speed measuring devices. The contact speed measuring device mainly uses the strain sensor as a means of collecting signals, which can obtain a relatively high capture rate and is cost-effective. Its disadvantage is that it will damage the road surface during installation. The strain sensor is buried underground, so it is easily affected by the environment. In addition, it is easy to be damaged by heavy vehicles, road repairs, etc., and the actual maintenance cost is higher than other speed measuring devices; the non-contact speed measuring device is mainly a radar speedometer, which is easy to carry, but the cost is high. Performance is also less stable.

Contents of the invention

The technical problem to be solved by the present invention is to propose a visible light highway speed measuring system, which is simple in structure, easy to maintain, low in cost and reliable in performance, aiming at the deficiencies of the above-mentioned prior art.

The technical solution adopted by the present invention to solve the technical problem is to propose a visible light highway speed measuring system, which includes an optical signal generating device, an optical signal receiving device and a signal processing device, and the optical signal generating device is used to provide light to the vehicles The light source on the above; the optical signal receiving device is used to receive the optical signal reflected from the vehicle, and convert the optical signal into an electrical signal and transmit it to the signal processing device; the signal processing device is used to The electrical signal calculates the speed of the vehicle.

Further, the optical signal generating device is a traffic signal lamp or a street lamp for providing the light source.

Further, the optical signal generating device is an LED lamp.

Further, the visible light road speed measurement system further includes an information providing device, which is used to provide vehicle speed information, road condition information, weather information or advertisement information.

Further, the information providing device includes a display screen or a voice device or a signal light.

Further, the visible light highway speed measurement system also includes a dispatching command monitoring terminal, and the signal processing device is also used to transmit the speed information of the vehicle to the dispatching command monitoring terminal, and the traffic police can according to the speed displayed by the dispatching command monitoring terminal The information dispatches the means of transportation.

Further, the dispatching command monitoring terminal is a handheld terminal.

Further, the dispatching command monitoring terminal is a computer server.

Further, the visible light highway speed measurement system also includes a vehicle information collection device, which is used to collect vehicle information and transmit the vehicle information to the dispatching command monitoring terminal.

Further, the vehicle information collection device is an image sensor, and the image sensor is used to photograph the license plate number of the vehicle, and transmit the corresponding license plate number information to the signal processing device.

In summary, the visible light road speed measurement system of the present invention can directly use the existing traffic signal lights through the cooperation between the above-mentioned devices, and can realize the speed measurement of the vehicle, which solves the problem of the existing contact speed measurement device and non-contact speed measurement device. The disadvantages of the conventional speed measuring device are its simple structure, easy maintenance, low cost and reliable performance.

Description of drawings

Fig. 1 is a functional block diagram of an embodiment of the visible light highway speed measurement system of the present invention.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Please refer to FIG. 1 , the visible light road speed measuring system of the present invention includes an optical signal generating device 1 , an optical signal receiving device 2 , a signal processing device 3 , a vehicle information collecting device 4 , an information providing device 5 and a dispatching command monitoring terminal 6 . The light signal generating device 1 is used to provide a light source for illuminating vehicles, which may be traffic lights or street lights. In this embodiment, the optical signal generating device 1 is an LED traffic signal lamp for providing the light source, and the LED traffic signal lamp can be arranged at a tunnel entrance or a crossroad, and has dual functions of providing a speed measuring light source and a traffic signal, The existing traffic signal light resources can be fully utilized, thereby reducing costs and facilitating popularization.

The optical signal receiving device 2 is used to receive the optical signal reflected from the vehicle, convert the optical signal into an electrical signal and send it to the signal processing device 3 . In this embodiment, the optical signal receiving device 2 is a photoelectric converter, and the signal processing device 3 is a DSP processor. When a certain vehicle is driving towards the LED traffic light, under the control of the DSP processor, the LED traffic light emits a beam of light signals to the vehicle, and the light signal is reflected after encountering the vehicle Back, the photoelectric converter converts the optical signal into an electrical signal and transmits it to the DSP processor, and the DSP processor calculates the propagation distance of the white light signal according to the emission time and reception time of the optical signal, Further, the distance between the vehicle and the optical signal receiving device 2 is calculated. After a period of time, repeat the above-mentioned process, then, the DSP processor calculates the difference between the distances of the two vehicles and the optical signal receiving device 2, and then draws the distance of the vehicle in this period of time. segment to obtain the average speed of the vehicle.

The vehicle information collecting device 4 is used for sending vehicle information to the optical signal receiving device 2 . The information providing device 5 can be a display screen, a voice device or a signal light, which can be used to provide vehicle speed information, road condition information, weather information or advertisement information. In this embodiment, the vehicle information collecting device 4 and the information providing device 5 are image sensors and speakers respectively. The image sensor is used to photograph the license plate number of the vehicle, and transmit the corresponding license plate number information to the DSP processor. If the speed of the vehicle exceeds the specified speed of the road section, the DSP processor will transmit the vehicle speed information and prompt information of the vehicle to the speaker, so that the driver can control the speed of the vehicle, thereby reducing the occurrence of traffic accidents caused by overspeeding .

In addition, the DSP processor also transmits the license plate number information, vehicle speed information and time of the vehicle to the dispatching command monitoring terminal 6 through the network. The dispatching and commanding terminal 6 may be a handheld terminal or a computer server, etc. In this embodiment, the dispatching and commanding terminal 6 is a computer server. The traffic police dispatch vehicles according to the speed information displayed by the dispatch command monitoring terminal 6 . For example, if the speed of the vehicle is lower than the required basic speed of the road section, it means that the road section is congested or a traffic accident occurs, so the traffic police can rush to the scene in time to solve various emergencies. In addition, the dispatching command and monitoring terminal 6 is used to transmit road condition information, weather information or advertisement information to the DSP processor, and then the DSP processor transmits the road condition information, weather information or advertisement information to the loudspeaker , so it is convenient for drivers to understand road conditions and weather.

In summary, the visible light road speed measurement system of the present invention can directly use the existing traffic signal lights through the cooperation between the above-mentioned devices, and can realize the speed measurement of the vehicle, which solves the problem of the existing contact speed measurement device and non-contact speed measurement device. The disadvantages of the conventional speed measuring device are its simple structure, easy maintenance, low cost and reliable performance.

The preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art Under the enlightenment of the present invention, people can also make many forms without departing from the spirit of the present invention and the protection scope of the claims, and these all belong to the protection scope of the present invention.

Claims (10)

1. A visible light road speed measurement system, characterized in that: comprising an optical signal generating device, an optical signal receiving device and a signal processing device, the optical signal generating device is used to provide a light source irradiated onto the vehicle; the optical signal receiving The device is used to receive the light signal reflected from the vehicle, convert the light signal into an electrical signal and send it to the signal processing device; the signal processing device is used to calculate the speed of the vehicle according to the electrical signal . 2. The visible light highway speed measurement system according to claim 1, characterized in that: the optical signal generating device is a traffic signal light or a street light. 3. The visible light highway speed measuring system according to claim 1, characterized in that: the optical signal generating device is an LED lamp. 4. The visible light highway speed measurement system according to claim 1, 2 or 3, characterized in that: the visible light highway speed measurement system also includes an information providing device, and the information providing device is used to provide vehicle speed information, road condition information, Weather information or advertising information. 5. The visible light highway speed measuring system according to claim 4, characterized in that: the information providing device comprises a display screen or a voice device or a signal light. 6. The visible light highway speed measurement system according to claim 1, 2 or 3, characterized in that: the visible light highway speed measurement system also includes a dispatching command monitoring terminal, and the signal processing device is also used to transmit the speed information of the vehicle For the dispatching, commanding and monitoring terminal, the traffic police dispatch vehicles according to the speed information displayed by the dispatching, commanding and monitoring terminal. 7. The visible light road speed measurement system according to claim 6, characterized in that: the dispatching command monitoring terminal is a hand-held terminal. 8. The visible light road speed measurement system according to claim 6, characterized in that: the dispatching command monitoring terminal is a computer server. 9. The visible light highway speed measurement system according to claim 6, characterized in that: the visible light highway speed measurement system further comprises a vehicle information collection device, and the vehicle information collection device is used to collect vehicle information and store the vehicle information Send it to the dispatching command monitoring terminal. 10. The visible light highway speed measurement system according to claim 9, characterized in that: the vehicle information collection device is an image sensor, and the image sensor is used to photograph the license plate number of the vehicle, and transmit the corresponding license plate number information to The signal processing means.

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