CN102236969A - Piezoelectric-film-type speed-measuring and snapshotting device for motor vehicle - Google Patents
Piezoelectric-film-type speed-measuring and snapshotting device for motor vehicle Download PDFInfo
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- CN102236969A CN102236969A CN2011100578855A CN201110057885A CN102236969A CN 102236969 A CN102236969 A CN 102236969A CN 2011100578855 A CN2011100578855 A CN 2011100578855A CN 201110057885 A CN201110057885 A CN 201110057885A CN 102236969 A CN102236969 A CN 102236969A
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Abstract
The invention discloses a piezoelectric-film-type speed-measuring and snapshotting device for a motor vehicle. The device is characterized by comprising a piezoelectric film sensor group, an analog signal conditioning module, an analog/digital conversion module, a digital signal processing module, a video collecting module, a camera, a communication module and an electricity supply module, wherein the piezoelectric film sensor group is connected with the digital signal processing module through the analog signal conditioning module and the analog/digital conversion module; the output interface of the camera is connected with the digital signal processing module through the video collecting module; and the digital signal processing module is connected with the communication module and the electricity supply module. According to the invention, an advanced sensor technology, a computer technology and a video image processing technology are applied to the speed measurement of the motor vehicle, the functions of carrying out pictures snapshot, pictures uploading and the like on peccancy vehicles rapidly, accurately and full-automatically around the clock are realized, and round-the-clock unmanned monitoring on high ways, villages, schools and the like is realized, thus the device provided by the invention has significance on maintaining traffic order.
Description
[technical field]
The present invention relates to intelligent transportation field, be specifically related to a kind of motor vehicle device for measuring speed and taking snap pictures.
[background technology]
Current mobility car velocity-measuring system roughly is divided into three kinds of laser velocimeter, radar velocity measurement and video frequency speed-measurings.
The ultimate principle of laser velocimeter system is based upon on the basis of light wave range finding, utilizes the ratio to the repeatedly range finding of moving object and time to draw its movement velocity.Laser velocimeter system requires very high for the angle that tests the speed, velocity-measuring system should be over against the direction of motion of moving object, and the measured deviation angle should be less than 10 °, and this system price costliness.
The radar velocity measurement system has adopted the radar Doppler system, and Doppler effect is meant that the signal frequency that receives will change when between emissive source and the recipient relative radial motion being arranged.This method requires very high to the angle that tests the speed, velocity-measuring system should be over against the direction of motion of moving object.The measured deviation angle should be less than 10 °, and the system price costliness.
The video frequency speed-measuring system adopts Target Recognition and target following technology, by the modeling and the method for video image processing acquisition car speed of complexity.This system modelling complexity, data operation quantity is big, and to the hardware requirement height, night or inclement weather are bigger to the system accuracy influence.
Piezoelectric membrane is as a kind of linearity height, fast, the highly sensitive piezoelectric sensor of response speed, has been widely used in the transducer part in the devices such as probe, sonar, earphone, microphone, phone, sphygmomanometer of supersonic diagnostic set.
[summary of the invention]
For overcome laser velocimeter, the radar velocity measurement misalignment angle is little, cost is high, high and the deficiency easily affected by environment of video frequency speed-measuring hardware requirement height, algorithm complexity, False Rate, fundamental purpose of the present invention provide a kind of simply, effectively, accurately, affected by environment, not intelligent motor vehicle measuring speed and taking snap pictures system.
The present invention is that the technical scheme that is adopted that achieves the above object is:
A kind of piezoelectric film type motor vehicle device for measuring speed and taking snap pictures, comprise piezoelectric film sensor group, analog signal conditioner module, analog-to-digital converting module, digital signal processing module, video acquisition module, camera, communication module and supply module, described piezoelectric film sensor group links to each other with digital signal processing module by analog signal conditioner module, analog-to-digital converting module, described camera output interface links to each other with digital signal processing module by video acquisition module, and described digital signal processing module links to each other with supply module with communication module.The piezoelectric film sensor group comprises two parallel piezoelectric film sensors and places the ground induction coil that is used for the branch car between the two among the present invention, the distance of piezoelectric film sensor is IS, it is It that vehicle was pressed the mistiming of two piezoelectric film sensors, it is V=that the speed of sensor was pressed in measurement, when this speed when limiting velocity amplitude, digital signal processing module triggers video acquisition module control camera and takes, the photo that photographs is together with car speed, time, the place is sent by communication module in the lump, and traffic police information center just can collect the automobile overspeed situation in each monitoring place under unattended situation.
The invention has the beneficial effects as follows:
Advanced person's sensor technology, computer technology, video image processing technology is applied to during motor vehicle tests the speed, realize quick, accurate, full-automatic, round-the-clock the overspeed violation vehicle being taken pictures and picture such as uploads automatically at function, realize round-the-clock unattended monitoring in speed limit highway sections such as highway, village, schools, significant to safeguarding traffic order.
[description of drawings]
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention
Fig. 2 is an actual installation structural representation of the present invention
Fig. 3 is embedded in structural representation under the road surface for piezoelectric film sensor among the present invention
[embodiment]
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, the present invention is made up of piezoelectric film sensor group, analog signal conditioner module, analog-to-digital converting module, digital signal processing module, video acquisition module, camera, communication module and supply module, the actual installation mode referring to figs. 2 and 3.Supply module is converted into the 5V direct current with civil power, is respectively analog signal conditioner module, analog-to-digital converting module, digital signal processing module, video acquisition module, communication module power supply; The analog signal conditioner module of signal in the piezoelectric film sensor through being attached thereto carried out impedance conversion, filtering, processing such as amplification, signal after the processing (can adopt AD7896 through analog-to-digital converting module, but be not limited thereto) be converted to digital signal, digital signal is handled through digital signal processing module, obtain unique point (peak point or rate of rise maximum point), the unique point time corresponding difference of two-way piezoelectric film sensor is It, the distance of two piezoelectric film sensors is IS, so the speed v in the time of can getting tested vehicle and pressed piezoelectric film sensor=, when this speed limits speed above predefined this highway section, digital signal processing module just control of video acquisition module and camera takes HD video or one group of HD image of this violation vehicle, then with the high sharpness video that is filmed or high-resolution figure together with time and the information such as this camera installation site that preset, be transferred to traffic control center by communication module (present embodiment employing cable network), as punishing justification to the violation vehicle.
The supply module of being mentioned in the present embodiment is converted into 5V voltage for other module for power supply are a kind of more common, general power supply modes with civil power, changes into other DC voltage or be respectively disparate modules that different supply voltages is provided also is feasible; Two parallel installations of piezoelectric film sensor of the employing that present embodiment is mentioned, it is a kind of fairly simple, scheme of optimizing that ground induction coil is embedded between the two mounting means, the position of the bar number of limit sensor, whether parallel, ground induction coil not, other similar fashion also can reach same purpose; The analog signal conditioner circuit adopts impedance inverter circuit, filtering circuit, amplifying circuit that signal is handled, and does not limit sequencing and progression that these three kinds of treatment circuits connect, and other similar fashion can reach this purpose too; Communication module adopts the cable network mode, also can adopt setting and the visit to local device of wireless transmission method realization data transmission and traffic control center.
In addition to the implementation, all employings are equal to the technical schemes that form obtained such as replacement or equivalent transformation, all within protection scope of the present invention.
Claims (6)
1. a piezoelectric film type motor vehicle device for measuring speed and taking snap pictures is characterized in that comprising piezoelectric film sensor group, analog signal conditioner module, analog-to-digital converting module, digital signal processing module, video acquisition module, camera, communication module and supply module.
2. piezoelectric film type motor vehicle device for measuring speed and taking snap pictures as claimed in claim 1 is characterized in that adopting piezoelectric film sensor group sense vehicle to pass through information.
3. piezoelectric film type motor vehicle device for measuring speed and taking snap pictures as claimed in claim 1 is characterized in that the piezoelectric film sensor group comprises piezoelectric film sensor and the ground induction coil that is used for the branch car.
4. piezoelectric film type motor vehicle device for measuring speed and taking snap pictures as claimed in claim 1 is characterized in that adopting the piezoelectric film sensor group to be directly fixed in the narrow groove of road surface excavation.
5. piezoelectric film type motor vehicle device for measuring speed and taking snap pictures as claimed in claim 1, it is characterized in that when detecting vehicle and pressed the speed of piezoelectric membrane sensor groups to surpass preset value digital signal processing module control of video image processing module and camera automatic camera or high definition video recording.
6. piezoelectric film type motor vehicle device for measuring speed and taking snap pictures as claimed in claim 1, after it is characterized in that photographing over-speed vehicles picture or video, digital signal processing module control communication module is transferred to control data corporation automatically with information such as vehicles peccancy picture or video, speed, time and places.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100578855A CN102236969A (en) | 2011-03-10 | 2011-03-10 | Piezoelectric-film-type speed-measuring and snapshotting device for motor vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100578855A CN102236969A (en) | 2011-03-10 | 2011-03-10 | Piezoelectric-film-type speed-measuring and snapshotting device for motor vehicle |
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| CN102236969A true CN102236969A (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100578855A Pending CN102236969A (en) | 2011-03-10 | 2011-03-10 | Piezoelectric-film-type speed-measuring and snapshotting device for motor vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308710A (en) * | 2013-06-03 | 2013-09-18 | 沈阳天久信息技术工程有限公司 | Motor vehicle speed detection device and method based on piezoelectric transducers |
| CN108427012A (en) * | 2018-02-01 | 2018-08-21 | 深圳市智能机器人研究院 | A kind of vehicle speed measurement system and its implementation based on vibrating sensor |
| CN111210630A (en) * | 2020-01-14 | 2020-05-29 | 长安大学 | Piezoelectric pavement-based vehicle traffic state self-perception early warning system and method |
| CN112323666A (en) * | 2020-11-06 | 2021-02-05 | 中北大学 | Intelligent deceleration strip |
-
2011
- 2011-03-10 CN CN2011100578855A patent/CN102236969A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308710A (en) * | 2013-06-03 | 2013-09-18 | 沈阳天久信息技术工程有限公司 | Motor vehicle speed detection device and method based on piezoelectric transducers |
| CN108427012A (en) * | 2018-02-01 | 2018-08-21 | 深圳市智能机器人研究院 | A kind of vehicle speed measurement system and its implementation based on vibrating sensor |
| CN111210630A (en) * | 2020-01-14 | 2020-05-29 | 长安大学 | Piezoelectric pavement-based vehicle traffic state self-perception early warning system and method |
| CN112323666A (en) * | 2020-11-06 | 2021-02-05 | 中北大学 | Intelligent deceleration strip |
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Application publication date: 20111109 |