CN208673526U - A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System - Google Patents
A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System Download PDFInfo
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- CN208673526U CN208673526U CN201821448697.9U CN201821448697U CN208673526U CN 208673526 U CN208673526 U CN 208673526U CN 201821448697 U CN201821448697 U CN 201821448697U CN 208673526 U CN208673526 U CN 208673526U
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Abstract
A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System, comprising: vehicle sensor, camera, semiconductor photo detector, controller and LED light.When there is vehicle on exit and entrance, just opens optical detection device and lamp controls and receives element, according to ambient brightness at that time, it compares and whether needs light filling, the lamplight brightness for needing light filling is realized and is automatically adjusted to ambient brightness, and good condition energy conservation and environmental protection simultaneously can be provided for identification license plate.
Description
Technical field
The utility model relates to light sensation and environment light-supplementing control technology field, especially a kind of parking lot Vehicle License Plate Recognition System
Light sensation and environment light-supplementing control system.
Background technique
With the rapid development of computer technology, the raising of license plate recognition technology, parking lot generally uses intelligent transportation system
System captures a wherein frame from camera video picture and carries out content picture analyzing, extracts license plate number and other information.In order to from
Accurate license plate number information is extracted in picture analyzing, and license plate brightness on picture there are certain requirements, but with ring when shooting
Border brightness change decides whether light, and the brightness of demand lamp is not fixed, and light compensating lamp is not necessarily had on camera, is had
The camera of light compensating lamp usually requires to manually adjust position, not can guarantee brightness needed for having identification when shooting.If protected always
The unlatching for holding lamp, it will cause the wastes of electric energy.
Utility model content
In order to overcome the disadvantages mentioned above of the prior art, above-mentioned technology can be solved the purpose of the utility model is to provide one kind and is asked
The light sensation and environment light-supplementing system of a kind of parking lot Vehicle License Plate Recognition System of topic.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System, comprising:
Whether vehicle sensor: incuding on the direction to the car of corresponding road has vehicle；
Camera: the identification to license plate；
Semiconductor photo detector: analog electrical signal is converted optical signals to；
Controller: receive vehicle sensor and semiconductor photo detector signal, control semiconductor photo detector and
The switch of LED light；
LED light: light source is provided.
The vehicle sensor is located in front of camera；The controller is placed in camera cabinet interior, by circuit with
Vehicle sensor, camera, semiconductor photo detector are connected with LED light；The semiconductor photo detector is placed in camera
On pillar；The LED light is located at below semiconductor photo detector with camera towards identical.
The semiconductor photo detector is located on camera pillar, below camera, the top of LED light.
The LED light is located at below camera shooting column with camera towards identical, all towards parking stall.
The vehicle sensor includes at least optical sensor, electromagnetic sensor and heat sensor one of which, is installed on
Before the camera of parking lot, optical sensor is detected by optical change, and electromagnetic sensor is by being converted into telecommunications for pressure signal
Number detection, heat sensor varied with temperature using conductor or semiconductor resistor rate measure the principle of temperature detection parking stall on is
No to have parked vehicle, vehicle sensor is connect with controller, and testing result is sent to controller.
For the controller after receiving the testing result of vehicle sensor, semiconductor photo detector is opened in control, is inhaled
It receives photon and generates electron-hole pair, the photoelectric current directly proportional to incident intensity is generated in external circuit, incident optical signal is converted
For electric signal, detection result is sent to controller.
The controller includes operational amplifier, and after the electric signal for receiving semiconductor photo detector, comparative measurements is not
With the corresponding voltage under illumination, the switch and output voltage of LED light are controlled.
Compared with prior art, the utility model has the beneficial effects that just opening and partly leading when there is vehicle on exit and entrance
Body photodetector and lamp compare according to ambient brightness at that time and whether need light filling, need the lamplight brightness of light filling, real
Show and ambient brightness has been automatically adjusted, good condition energy conservation and environmental protection simultaneously can be provided for identification license plate.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the camera partial schematic diagram of the utility model.
Specific embodiment
Now in conjunction with Detailed description of the invention, the present invention will be further described with embodiment:
As shown in Figs. 1-2, the light sensation and environment light-supplementing control system of a kind of parking lot Vehicle License Plate Recognition System, has in parking lot
Camera 4 and camera pillar, imaging on column has semiconductor photo detector 2 and LED light 3, and vehicle sensor 1 is on parking stall 5
On, LED light 3 and camera 4 are towards parking stall 5.
Optical sensor is included at least in the vehicle sensor 1 and heat sensor is one of, and optical sensor can be visited
It is mobile to measure object, wherein infrared inductor utilizes infrared reflection principle, and electromagnetic sensor can experience pressure signal, wherein
Pressure resistance type electromagnetic sensor is adsorbed on whose mechanically deform of basis material quotient strain resistor using metallic resistance allergic effect piece and changes resistance
The principle of value, heat sensor using using conductor or semiconductor, resistivity difference detects the variation of temperature at different temperatures,
To achieve the purpose that detect vehicle, testing result is sent to controller by circuit.
Controller is located in camera chest 4, passes through circuit and vehicle sensor 1, semiconductor photo detector 2 and LED
Lamp 3 is connected, and when receiving vehicle sensor 1 and detecting the signal of vehicle, opens semiconductor photo detector 2.
Semiconductor photo detector 2 is located on camera pillar, has the characteristics that dustproof and rainproof water, controls extraneous factor shadow
Testing result is rung to be converted to electric signal after semiconductor photo detector absorbs ambient light and be sent to controller.
After controller receives optical detection result, comparison voltage, according to comparing result output different voltages open LED light 3 or
It is not turned on LED light 3.
There is switch compensation circuit in controller, the quick release signal after overcurrent pre-processes is reduced because voltage change is made
At circuit damage and electrical short-circuit.
In following case study on implementation, vehicle sensor uses infrared inductor.
Case study on implementation one:
(1) vehicle is parked on the preceding parking stall of camera, and infrared inductor senses vehicle, and testing result is sent to control
Instrument.
(2) controller opens semiconductor photo detector, and ambient light illumination 10lx is believed incident light using photoelectric effect
Number analog electrical signal is converted to, analog electrical signal is sent to controller.
(3) after controller receives analog electrical signal, comparative measurements voltage, unlatching LED light is 5W.
(4) when vehicle leaves infrared inductor induction local, controller disconnects LED lamp circuit, and LED light is extinguished.
Case study on implementation two:
(1) vehicle is parked on the preceding parking stall of camera, and infrared inductor senses vehicle, and testing result is sent to control
Instrument.
(2) controller opens semiconductor photo detector, and ambient light illumination 200lx is believed incident light using photoelectric effect
Number analog electrical signal is converted to, analog electrical signal is sent to controller.
(3) after controller receives analog electrical signal, comparative measurements voltage, unlatching LED light is 3W.
(4) when vehicle leaves infrared inductor induction local, controller disconnects LED lamp circuit, and LED light is extinguished.
Case study on implementation three:
(1) vehicle is parked on the preceding parking stall of camera, and infrared inductor senses vehicle, and testing result is sent to control
Instrument.
(2) controller opens semiconductor photo detector, and ambient light illumination 500lx is believed incident light using photoelectric effect
Number analog electrical signal is converted to, analog electrical signal is sent to controller.
(3) after controller receives analog electrical signal, comparative measurements voltage is not turned on LED light.
Case study on implementation four:
(1) it is parked on the preceding parking stall of camera without vehicle, infrared inductor is non-inductive to arrive vehicle, semiconductor optoelectronic detection
Device and LED light are open circuit state.
The major function of the utility model: when there is vehicle on exit and entrance, just opening semiconductor photo detector and lamp,
It according to ambient brightness at that time, compares and whether needs light filling, need the lamplight brightness of light filling, realize automatic to ambient brightness
It adjusts, good condition energy conservation and environmental protection simultaneously can be provided for identification license plate.
In conclusion after those skilled in the art read the utility model file, skill according to the present utility model
Art scheme and technical concept are not necessarily to creative mental labour and make other various corresponding conversion schemes, and it is practical new to belong to this
The range that type is protected.
Claims (3)
1. the light sensation and environment light-supplementing control system of a kind of parking lot Vehicle License Plate Recognition System, comprising: vehicle sensor, camera,
Semiconductor photo detector, controller and LED light, it is characterised in that: the vehicle sensor is located in front of camera；The control
Instrument processed is placed in camera cabinet interior, is connected by circuit with vehicle sensor, semiconductor photo detector and LED light；It is described
Semiconductor photo detector is placed on camera pillar；The LED light is located at below semiconductor photo detector and camera shooting head
To identical.
2. the light sensation and environment light-supplementing control system of a kind of parking lot Vehicle License Plate Recognition System according to claim 1, special
Sign is: the semiconductor photo detector is located on camera pillar, below camera, the top of LED light.
3. the light sensation and environment light-supplementing control system of a kind of parking lot Vehicle License Plate Recognition System according to claim 1, special
Sign is: the LED light is located at below camera shooting column with camera towards identical, all towards parking stall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821448697.9U CN208673526U (en) | 2018-09-05 | 2018-09-05 | A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821448697.9U CN208673526U (en) | 2018-09-05 | 2018-09-05 | A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System |
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| Publication Number | Publication Date |
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| CN208673526U true CN208673526U (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821448697.9U Active CN208673526U (en) | 2018-09-05 | 2018-09-05 | A kind of light sensation and environment light-supplementing control system of parking lot Vehicle License Plate Recognition System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113761655A (en) * | 2021-08-23 | 2021-12-07 | 重庆长安汽车股份有限公司 | Light supplementing device for rear camera of automobile and light distribution optimization method |
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2018
- 2018-09-05 CN CN201821448697.9U patent/CN208673526U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113761655A (en) * | 2021-08-23 | 2021-12-07 | 重庆长安汽车股份有限公司 | Light supplementing device for rear camera of automobile and light distribution optimization method |
| CN113761655B (en) * | 2021-08-23 | 2024-01-19 | 重庆长安汽车股份有限公司 | Light supplementing device for rear camera of automobile and light distribution optimization method |
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Address after: 510000 A 2-storey 203-A house, No. 96 Lianhe Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: NANZE (GUANGDONG) TECHNOLOGY Co.,Ltd. Address before: 510000 self - numbered 2 - story 1203-A room, No. 96, he he road, Whampoa District, Guangzhou, Guangdong Patentee before: GUANGZHOU NANZE ELECTRONIC TECHNOLOGY Co.,Ltd. |