CN207718625U - The traffic monitor of changeable image pickup mode - Google Patents
The traffic monitor of changeable image pickup mode Download PDFInfo
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- CN207718625U CN207718625U CN201820041203.9U CN201820041203U CN207718625U CN 207718625 U CN207718625 U CN 207718625U CN 201820041203 U CN201820041203 U CN 201820041203U CN 207718625 U CN207718625 U CN 207718625U
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- image pickup
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Abstract
The utility model discloses a kind of traffic monitors of changeable image pickup mode, including sensor group, infrared photography unit, visible image capturing unit, visible image capturing machine head, infrared photography machine head, holder driver and digital signal processor；Sensor group includes pressure sensor, optical displacement sensor and photosensitive sensor, and the thermal camera and visible light camera acquire image information, and the above equipment connects digital signal processor as detection front end.Holder driver adjusts visible light camera and thermal camera angle in real time.System described in the utility model has continuous and two kinds of operating modes of interval shooting, shorten System production time, lifetime of system is extended, system cost cost is reduced, it can be according to intensity of illumination, switching shooting camera, it avoids and mends visible light to the dizzy influence of human eye generation, reduce traffic safety hidden danger, fine-tuning camera angle, no dead angle shooting, can round-the-clock progress Car license recognition, shooting violating the regulations.
Description
Technical field
The utility model patent belongs to technical field of intelligent traffic, and in particular to a kind of traffic prison of changeable image pickup mode
Control device.
Background technology
For flash lamp in field of traffic using more and more extensive, the electronic eyes used on current road is by visible white heat
Light carries out light filling candid photograph, and the stimulation that the eyes of driver are vulnerable to strong light generates dizzy, is easy to cause traffic accident；It is incandescent bright
Degree is stronger, and ambient temperature is higher, influences the effect of camera collection image；Night light is very dark, and the picture of shooting is clear
It spends poor, it is difficult to take more details violating the regulations；In practical electronic eyes captures application, system cannot be with ambient light
Variation adjusts light filling equipment intensity of illumination, causes light compensating lamp power consumption high, waste of energy shortens equipment life；Work as traffic conditions
Shooting angle can not be intelligently adjusted when complicated, there are camera shooting dead angles.
Patent CN105894821A discloses a kind of traffic comprehensive monitor system based on high definition DSP video cameras, including figure
As collecting unit, data storage cell can realize then Car license recognition, tachometric survey, the functions such as traffic statistics will periodically be deposited
The image and data of storage are sent to central platform via data transmission unit.The device uses LED stroboscopic light filling lamps or LED constants
Light compensating lamp cannot switch shooting camera, and the light filling in the case where light is undesirable easily generates human eye dizzy influence, deposits
In traffic safety hidden danger, shooting angle cannot be adjusted, there are shooting blind angle amounts.
Patent CN205486800U discloses a kind of Infrared ray electronic policemen system, which includes operation control terminal, controls mould
Block, data management module, infrared detection module and image capture module improve the processing capacity transmittability of data and take the photograph
As ability.Patent CN204101868U discloses a kind of intelligent high definition electronic police infrared flash lamp, including LED infrared rays dodge
Light lamp and remote controler can be connect with different types of mounting seat, and direction is still adjusted after installation fixes to change photograph
Firing angle degree is capable of the intensity of illumination of remote control change flash lamp.
Patent CN201220554356 discloses a kind of infrared electronic police system with visible light light filling of fusion, can solve
The influence of the excessively bright generation of LED light also solves the problem that the colour cast phenomenon that infrared light filling occurs, night picture of the camera under color mode
Total quality increases.The device only adjusts the hot spot form of LED lamp bead module formation, and effect is difficult to control and detection.
Apparatus above is only to replace visible light camera, thermal camera to open cause work(for a long time using thermal camera
Consumption is higher, and camera longevity of service, short life, system price is higher, is not suitable for promoting the use of on a large scale.
Invention content
In order to solve the above technical problems, the utility model provides a kind of traffic monitoring dress of changeable infrared photography pattern
It sets, the system function is abundant, ensures imaging clearly in the case that light is weaker using thermal camera, avoids visible image capturing
The dizzy influence that machine light filling equipment generates driver ensures that the stabilization of driver and passenger's safety and traffic order, simultaneity factor exist
Ambient lighting ideally switches visible light camera shooting, shortens the thermal camera working time, extends system
Service life reduces system price.
To achieve the above object, the utility model provides the following technical solutions：A kind of traffic prison of changeable image pickup mode
Control device, including sensor group, infrared photography unit, visible image capturing unit, LED light emitting arrays, visible image capturing machine head,
Infrared photography machine head, holder driver and digital signal processor；The sensor group includes optical displacement sensor, pressure
Force snesor, photosensitive sensor and infrared sensor；The data transmission of optical displacement sensor acquisition is to digital signal
Processor is for measuring Vehicle Speed；The pressure sensor is connect with digital signal processor, and it is logical to determine whether vehicle
It crosses and feeds back information of vehicle flowrate；The data transmission of the photosensitive sensor acquisition passes through digital signal to digital signal processor
Processor and the standard of luminous intensity value of setting compare, switching shooting camera；The infrared sensor can detect the infrared spoke of ambient enviroment
It penetrates；The thermal camera and the image information of visible light camera acquisition pass back to Digital Signal Processing；Using visible light
Under image pickup mode, LED light emitting arrays are for giving visible image capturing unit light filling；The holder driver is for receiving digital signal
The signal actuated camera holder that processor generates adjusts the shooting angle of video camera；The digital signal processor is for locating
It manages the data that sensor and two kinds of video cameras are acquired and exports control signal.
Further, system is designed with storage unit, for storing road information database, in actual traffic monitoring,
Digital signal processor processes pressure sensor gathered data result is compared with database standard value, in interval shooting and continuous bat
It takes the photograph in two kinds of operating modes and switches over, when being operated in the few section of vehicle flowrate or period, system is operated in interval shooting mould
Formula, when being operated in the big section of vehicle flowrate or period, system are operated in continuous photographing mode.
Further, photosensitive sensor light sensing front end is mounted on cantilever shalving, and digital signal processor can root
According to photosensitive sensor acquisition data by video camera ambient enviroment light it is bright secretly with the standard of luminous intensity value of setting compare, light compared with
Ideally to be shot using visible light camera, and light filling, light can be finely adjusted according to practical weather condition
In the case of undesirable, switch infrared camera.
Further, the pressure sensor group includes that number of probes is equal to number of track-lines, and induction front end is embedded in correspondence
Below track, length is across entire track, and camera field of view center line face elastic sensing element, digital signal processor is according to pressure
The signal strength variation zone separating vehicles of force snesor acquisition, may also function as and determine whether vehicle and pass through, under interval shooting pattern
Wake up the effect of video camera.
Further, the thermal camera and visible light camera carry holder, can be mounted on cantilever shalving and carry out
Angle adjustment, prevents shooting blind angle amount, and installation number can determine that formula is as follows according to camera field of view angle and road width：
In formula, D is that single camera shoots width, and s is video camera to ground shooting distance, and α is camera field of view angle, than
Width is shot compared with road width and single camera, determines video camera number, wherein it is necessary to meet following condition for video camera number：
Wherein M is video camera number, and W is road width, and D is that single camera shoots width.In view of what is be arranged side by side
Camera field of view can intersect, therefore video camera number should be more than the ratio of road width and single camera shooting width.
Further, the optical displacement sensor is mounted on immediately below video camera, perpendicular to ground, the data of acquisition
Digital signal processor is transferred to for measuring Vehicle Speed, formula is as follows：
In formula, v is that vehicle travels average speed, and s is that vehicle travels displacement, t2-t1For light reflection time difference, measured vehicle
Traveling average speed and current lane limit velocity contrast, judge whether the vehicle exceeds the speed limit.
Further, the thermal camera is equipped with filter plate, the infrared band that adjustable vehicle actual emanations go out with it is red
Outer video camera most preferably shoots wave band and matches, can be with illumination inside and outside environment using automatic growth control (AGC) circuit of camera
Variation automatically adjustment amplifier gain, so that infrared camera is worked in larger illumination range, in low-light (level) item
Clearly image can be obtained under part.
Further, LED light emitting arrays are matrix form light emitting arrays, and the signal that can be detected according to photosensitive sensor is adjusted
The LED light quantity opened in array realizes multi gear light filling.
Further, system needs periodically debugging, and calibration object, thermal camera irradiation calibration object are equipped in image pickup scope
And compared with the gray value of setting, the parameters such as aperture and gain for adjusting thermal camera by founding mathematical models avoid
Long-term work shoots the phenomenon that image generates color drift in the presence of a harsh environment, enhances the robustness of system.
Further, digital signal processor generates four road pulse-width signals, by each phase driving circuit again with up to woods
The transistor that pauses connects, and each phase winding output of control stepper motor makes stepper motor be rotated forward with different pulse-width signals,
Reversion accelerates, and slows down, the actions such as stopping.
Compared with prior art, the utility model has the advantages that：
1. the light human eye that infrared LED light emitting array is sent out is invisible, avoid due to visible light light filling is excessively bright to human eye
The dizzy influence generated, reduces traffic safety hidden danger.
2. the system can be compared according to the size and database of vehicle flowrate, switch two kinds of operating modes, including continuously clap
It takes the photograph and interval shooting shortens System production time in the case where ensuring traffic monitoring safety, reduce power consumption.
3. the system has two groups of cameras, visible light camera is used when light is preferable, is taken the photograph using infrared when light is weak
Camera shortens the infrared camera working time, effectively extends lifetime of system, reduces hardware replacement cost.
Description of the drawings
Fig. 1 is the system principle diagram of the utility model patent；
Fig. 2 is that the utility model is continuously shot flow chart with interval shooting pattern；
Fig. 3 is the flow chart of the utility model shooting camera switching；
Fig. 4 is the utility model holder driver working circuit diagram.
Specific implementation mode
A kind of traffic monitor of changeable infrared photography pattern as shown in Figure 1, including sensor group, infrared photography
Unit, visible image capturing unit, LED light emitting arrays, visible image capturing machine head, infrared photography machine head, holder driver and
Digital signal processor；The sensor group includes optical displacement sensor, pressure sensor and photosensitive sensor；The light
The data transmission of electric-type displacement sensor acquisition is to digital signal processor for measuring Vehicle Speed；The pressure sensing
Device is connect with digital signal processor, is determined whether vehicle and is passed through, and the data transmission of the photosensitive sensor acquisition is believed to number
The changeable shooting camera of number processor；The thermal camera and the image information of visible light camera acquisition pass back to digital letter
Number processor；Under using visible image capturing pattern, the LED light emitting arrays are described for giving visible image capturing unit light filling
Holder driver is used to receive the signal actuated camera holder of digital signal processor generation to adjust the shooting angle of video camera
Degree, the digital signal processor are used to handle the data that sensor and two kinds of video cameras are acquired and export control signal.
As shown in Fig. 2, pressure sensor pressure sensitive front end is mounted on underground, length is regarded across entire road, video camera
Field center line face pressure sensitive front end, digital signal processor receive the data acquired from pressure sensor, output control letter
The shooting angle of video camera is intelligently adjusted number to holder driver, absorbs to no dead angle photo site, the signal of acquisition is by counting
Word signal processor is compared with database and current vehicle flowrate, and the control signal transmission of output judges video camera to video camera
It is operated in continuous photographing mode or interval shooting pattern, the image information of camera acquisition passes back to digital signal processor,
According to the processing feature of license plate image, final output license plate image recognition result.At the same time, it is mounted on beside camera and hangs down
Directly it is used to measure Vehicle Speed to digital signal processor in the data transmission of the optical displacement sensor on ground acquisition,
According to the difference of each car reflection light quantity and reflection interval, vehicle traveling displacement S and time difference t is measured2-t1, to obtain vehicle
Traveling average speed：
Velocity contrast is limited with current lane again, judges whether the vehicle exceeds the speed limit.
DSP CONTROL screening-mode is interval shooting or the concrete operations being continuously shot are：Pressure sensing
Device acquisition signal transmission to digital signal processor, after being calculated analytically, then with according to before collected vehicle flowrate number
The vehicle flowrate standard value set according to library is compared, and is made a policy by digital signal processor judgement, vehicle flowrate is more than standard
Switch continuous photographing mode, switching interval screening-mode when vehicle flowrate is less than standard value when value.Finally again the signal acquired
It is back to digital signal processor, is constantly increasing database information amount, as the time used is longer, the database of formation is believed
The breath amount the big, the vehicle flowrate standard value that adjusts more meets practical road conditions, and the decision that digital signal processor is made, which is more in line with, to be worked as
Preceding actual conditions save electric energy, extend the service life of video camera, reduce cost to realize two kinds of operating modes, improve
Shooting efficiency.
As shown in figure 3, before video camera is imaged, it is mounted on the photosensitive sensor light sensing front end on overarm frame
The bright dark degree of acquisition camera ambient enviroment light, by the data of acquisition by digital signal processor processes and according to reality
The standard of luminous intensity comparison for needing and setting, illustrates light if the signal value acquired is more than set standard of luminous intensity value
By force, it is switched to visible light camera shooting, and light filling can be finely adjusted using LED light emitting arrays according to practical weather condition；
Conversely, switching infrared camera.Under visible image capturing pattern, the LED light quantity opened by the control of LED light emitting arrays is real
Existing multi gear position light filling amount is adjusted.
As shown in figure 4, the holder driver adjusts video camera shooting angle.Specifically, driving circuit is reached comprising four groups
Islington transistor respectively whether energization to control stepper motor four sets of coils A, B ,/A ,/B, is produced as electronic switch by DSP
Raw pulse-width signal PWM1~PWM4, control signal is respectively transferred to four phase step motor, former according to the work of stepper motor
Reason, if by given working method positive sequence energization commutation, stepper motor rotates forward；If pressing inverted sequence energization commutation, stepping
Motor reversal；As soon as if giving stepper motor hair control pulse, it turns a step angle, then sends out a pulse, it can turn again
One step angle.Two interpulse periods are shorter, and stepper motor turns faster, and video camera rotation is also faster.Therefore, arteries and veins
The frequency f of punching determines the rotating speed of stepper motor, and in controllable velocity interval, the rotating speed of stepper motor and pulse are at just
Than.Every point of rotating speed of stepper motor can be calculated by following formula：
In formula, f is pulse frequency, and z is the rotor number of teeth, and N is umber of beats, and adjustment pulse frequency can carry out stepper motor
Adjustment.When digital signal processor receives the signal sent out from sensor, it will produce pulse width modulated wave, driving stepping electricity
Machine rotates, and controls the shooting angle of video camera.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (10)
1. a kind of traffic monitor of changeable image pickup mode, including sensor group, thermal camera, visible light camera and
Digital signal processor；It is characterized in that：The sensor group includes optical displacement sensor, pressure sensor, photosensitive biography
Sensor；The data transmission of the optical displacement sensor acquisition is to digital signal processor for measuring Vehicle Speed；
The pressure sensor is connect with digital signal processor, judges that vehicle controls shooting mode of camera by situation；Institute
The data transmission for stating photosensitive sensor acquisition exports control signal switching shooting camera to digital signal processor after treatment；
The thermal camera and the image information of visible light camera acquisition pass back to digital signal processor.
2. the traffic monitor of changeable image pickup mode according to claim 1, it is characterised in that：The monitoring device
Further include visible image capturing machine head, infrared photography machine head and holder driver；Before the pressure sensor pressure sensitive
End is mounted below track, and digital signal processor receives the data acquired from pressure sensor, outputs control signals to cloud
Platform driver, holder driver adjust the shooting of visible image capturing machine head or infrared photography machine head so as to adjust video camera
Angle.
3. the traffic monitor of changeable image pickup mode according to claim 2, it is characterised in that：The pressure sensing
Device includes that number of probes is equal to number of track-lines, and pressure sensor incudes front end length across entire track, camera field of view center line
Face pressure-sensing device.
4. the traffic monitor of changeable image pickup mode according to claim 2, it is characterised in that：Visible light camera
Holder or infrared photography machine head installation number shoot width and the determination of road width by video camera, and wherein video camera shooting is wide
It is as follows to spend calculation formula：
D is that single camera shoots width in formula, and s is video camera to ground shooting distance, and α is camera field of view angle, compares horse
Degree of having a lot of social connections and single camera shoot width, determine video camera number.
5. the traffic monitor of changeable image pickup mode according to claim 1, it is characterised in that：System, which is designed with, deposits
Storage unit, for storing information of vehicle flowrate on road database, the data of pressure sensor acquisition are by digital signal processor
Vehicle flowrate standard value after reason with database setting compares, and in interval shooting and two kinds of Working moulds are continuously shot according to comparing result
It is switched in formula.
6. the traffic monitor of changeable image pickup mode according to claim 1, it is characterised in that：The excessively described photoelectricity of pain
It is as follows that formula displacement sensor gathered data calculates Vehicle Speed formula：
In formula, v is that vehicle travels average speed, and s is that vehicle travels displacement, t2-t1For the light reflection time difference.
7. the traffic monitor of changeable image pickup mode according to claim 1, it is characterised in that：Digital Signal Processing
The location information that device is fed back according to pressure sensor generates pulse-width signal, brilliant with Darlington again by each phase driving circuit
Body pipe connects, and each phase winding output of control stepper motor makes stepper motor be rotated forward with different pulse-width signals, instead
Turn, accelerate, slow down, the action such as stopping is to control the motor adjustment camera shooting angle of driving holder.
8. the traffic monitor of changeable image pickup mode according to claim 1, it is characterised in that：In image pickup scope
Equipped with calibration object, thermal camera irradiation calibration object is simultaneously compared with the gray value of setting, is adjusted by founding mathematical models red
The parameters such as the aperture of outer video camera and gain.
9. the traffic monitor of changeable image pickup mode according to claim 1, it is characterised in that：The digital signal
Processor compares the data that photosensitive sensor acquires and the standard of luminous intensity value of setting, to export control signal, light
Ideally, when being not necessarily to light filling, switch visible light camera, in the case that light is undesirable, switch infrared camera.
10. the traffic monitor of the changeable image pickup mode according to claim 1 or 9, it is characterised in that：The monitoring
Device further includes LED light emitting arrays, the light intensity situation control arrived that digital signal processor can be detected according to photosensitive sensor
LED light emitting arrays processed are video camera light filling.
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| CN201820041203.9U CN207718625U (en) | 2018-01-10 | 2018-01-10 | The traffic monitor of changeable image pickup mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302566A (en) * | 2018-11-22 | 2019-02-01 | 深圳市景阳科技股份有限公司 | A kind of method, apparatus and terminal device of determining screening-mode |
| CN109389828A (en) * | 2018-10-19 | 2019-02-26 | 深圳市朋辉科技术有限公司 | A kind of monitoring system of road vehicle driving information |
| CN110826409A (en) * | 2019-10-09 | 2020-02-21 | 北京集光通达科技股份有限公司 | Road monitoring device and method |
| CN110871735A (en) * | 2018-08-31 | 2020-03-10 | 比亚迪股份有限公司 | Vehicle-mounted sensor and vehicle with same |
-
2018
- 2018-01-10 CN CN201820041203.9U patent/CN207718625U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110871735A (en) * | 2018-08-31 | 2020-03-10 | 比亚迪股份有限公司 | Vehicle-mounted sensor and vehicle with same |
| CN109389828A (en) * | 2018-10-19 | 2019-02-26 | 深圳市朋辉科技术有限公司 | A kind of monitoring system of road vehicle driving information |
| CN109302566A (en) * | 2018-11-22 | 2019-02-01 | 深圳市景阳科技股份有限公司 | A kind of method, apparatus and terminal device of determining screening-mode |
| CN110826409A (en) * | 2019-10-09 | 2020-02-21 | 北京集光通达科技股份有限公司 | Road monitoring device and method |
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