CN107610480A - A kind of infrared light curtain vehicle sensor and method - Google Patents
A kind of infrared light curtain vehicle sensor and method Download PDFInfo
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- CN107610480A CN107610480A CN201711015574.6A CN201711015574A CN107610480A CN 107610480 A CN107610480 A CN 107610480A CN 201711015574 A CN201711015574 A CN 201711015574A CN 107610480 A CN107610480 A CN 107610480A
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Abstract
The present invention relates to a kind of infrared light curtain vehicle sensor and method, including main sensor, auxiliary sensor and system microcontroller, main sensor includes one group of horizontal infrared light curtain sensor, can sense vehicle and drive into information and vehicle wheel base length information；Auxiliary sensor includes orthogonal two groups of infrared light curtain sensors, can measure the width for driving into vehicle.The present invention can be conveniently used for the parking navigation of parking lot vehicle, the problem of solving nearly parking lot vehicle mounted guidance or cell phone map navigation accuracy is looked into, or even can not use；Combine to obtain with visible LED array and consistent with driver's driving sight one-to-one be accurately positioned parking navigation；The error free walking navigation for entering or leaving parking lot can be provided with reference to visible LED for driver and occupant；Enter whether position rectifies with reference to voice, optical signal prompting vehicle parking, prevent from scratching.
Description
【Technical field】
The present invention relates to parking lot vehicle management field, more particularly to a kind of parking garage car of infrared vehicle sensor
The vehicle sensing detection means of vehicle management, specifically a kind of infrared light curtain vehicle sensor and method.
【Background technology】
Vehicle testing techniques are very universal, and mainstream technology is ground induction coil technology at present.Parking application indoors is upper,
The limitation of ground induction coil technology is can not to obtain the geometry information of vehicle, and more uses are embedded into mode and installed, and installation is more
Please cause inconvenient for use, parking stall use state information can not be especially provided for management system and parking stall parks cars size
Information, it has not been convenient to realize that parking stall dynamically manages in real time, let alone one-to-one accurate parking navigation is provided for parking；Ground sense line
Technology application is enclosed when large parking lot, installation and debugging are difficult, obtain vehicle geometry information difficulty, can not be sought for driver
Vehicle is looked for provide navigation difficulty etc..
【The content of the invention】
The present invention is to overcome above-mentioned the deficiencies in the prior art part, and it is an object of the present invention to provide a kind of infrared light curtain vehicle sensor
And method, the sensor is based on infrared ray light curtain detection technology, and for parking garage, the device can be used in parking lot discrepancy
Mouthful, driving path and the vehicle on parking stall sensing, can be conveniently used for parking navigation in parking lot, solve the problems, such as parking trouble,
Improve parking lot service efficiency；
The present invention is to reach above-mentioned purpose by the following technical programs：
A kind of infrared light curtain vehicle sensor, including：Main sensor, auxiliary sensor and system microcontroller, main sensor
Each there is independent microcontroller with auxiliary sensor, main sensor and auxiliary sensor are uniformly controlled management in system microcontroller
Under run work alone；
Main sensor includes one group of horizontal infrared light curtain sensor, the emission array of horizontal infrared light curtain sensor and reception
Array is located at track both sides respectively, and the light that emission array is sent can sense vehicle and drive into letter perpendicular to track longitudinal axis
Breath and vehicle wheel base length information；
Auxiliary sensor includes orthogonal two groups of infrared light curtain sensors, and one group in two groups of infrared light curtain sensors is red
Outer light curtain sensor overlaps with track longitudinal centre line, and the light that this group of infrared light curtain sensor is sent is in the longitudinal direction of track
Heart line, the length for driving into vehicle, another group of infrared light curtain sensor and previous group infrared light curtain sensor central point can be measured
Into right-angled intersection, the width for driving into vehicle can be measured；The emission array and reception battle array of the infrared light curtain sensor of auxiliary sensor
Row are set to form of tubes.
The emission array of infrared light curtain sensor is infrared LED emission array, and receiving array is infrared receiving diode battle array
Row；
In main sensor, the infrared LED on infrared LED emission array to be equidistantly mounted to linear light curtain emission array,
Photodiode on infrared receiving diode array is mounted to receive linear array with identical spacing dimension；
In auxiliary sensor, the infrared LED on infrared LED emission array and photosensitive two pole on infrared receiving diode array
Pipe is to be equidistantly set to form of tubes.
In main sensor, the spacing of the spacing of the infrared LED of emission array and the photodiode of receiving array is 1~
3 centimetres；In auxiliary sensor, the spacing of adjacent infrared LED and photodiode is 1~3 centimetre.
The spacing of the infrared LED of emission array and the spacing of the photodiode of receiving array are 1 centimetre, 2 centimetres or 3
Centimetre；In auxiliary sensor, the spacing of adjacent infrared LED and photodiode is 1 centimetre, 2 centimetres or 3 centimetres.
A kind of infrared light curtain vehicle method for sensing, is carried out as follows：
First photosensitive the two of the infrared LED to the emission array of the main sensor of infrared light curtain vehicle sensor and receiving array
Pole pipe is from vehicle heading, and successively according to 1,2,3 ..., N order is numbered, and N is positive integer, then to auxiliary sensor
The infrared LED of emission array and the photodiode of receiving array carry out serial number；Infrared LED and photosensitive is obtained by numbering
The coordinate of diode；
When vehicle drives into infrared light curtain vehicle sensor, vehicle tyre is according to 1,2,3 ... N order successively blocks master
The photodiode of sensor, the quantity for the neighboring photosensitive diode being blocked just represent the width of tire rolling road surface,
Automobile front and back wheel blocks two groups of photodiodes altogether, and the centre-to-centre spacing for the photodiode that two adjacent groups are blocked is exactly axle for vehicle
Away from；After main sensor senses vehicle wheelbase data, wheelbase data feedback to system microcontroller, started by system microcontroller
The length and width data message of auxiliary sensor sensing vehicle.
The infrared LED array of main sensor uses intermittent duty, and the photodiode arrangement of main sensor is using sense
Answer direct light mode to work, in infrared LED array transmit cycle and close cycle detection photodiode arrangement data.
Auxiliary sensor includes orthogonal two groups of infrared light curtain sensors, and two groups of infrared light curtain sensors are knocked off between using
Make mode, the infrared LED emission array of two groups of infrared light curtain sensors launches infrared ray, infrared receiving diode array to automobile
The infrared ray for receiving car body reflection carrys out collection vehicle information；
After the infrared light curtain sensor overlapped on auxiliary sensor with track longitudinal centre line senses information of vehicles, infrared light
Curtain vehicle sensor is started working, after vehicle rolls the infrared light curtain sensor overlapped with track longitudinal centre line away from, outer light curtain car
Sensor is stopped.
Be located at different tracks main sensor and auxiliary sensor work period it is separate, main sensor and auxiliary sensor
Work period be combined composition one detection cycle；The work period of main sensor and auxiliary sensor respectively accounts for infrared light curtain car
/ 3rd of sensor detection work period, and when main sensor is not detected by information of vehicles, auxiliary sensor, which is in, to stop
Only state.
Infrared light curtain vehicle sensor uses intermittent duty, and its intermittent time is adjustable with the detection cycle time, respectively
The detection work period of track infrared light curtain vehicle sensor is interleaved, prevent adjacent lane when multilane uses sensor it
Between produce interference.
Infrared light curtain vehicle sensor is in the detection work period with the signal of array reading non-detection work period and detection
Working period signal, detection working period signal are divided into infrared signal and non-LED transmit cycles signal and the auxiliary sense of main sensor
The infrared signal of device and non-LED transmit cycles signal are surveyed, sensing data is that photodiode arrangement senses in transmit cycle
Data, remaining signal is as background noise used for the anti-interference calculating of sensing data signal.
The information of vehicles that main sensor and auxiliary sensor are collected is sent to system microcontroller by data wire, is
Microcontroller of uniting is analyzed and processed and stored to the information of vehicles；Data communication is carried out using serial data communication mode, and is passed through
Data wire is sent to upper management system.
Compared with prior art, the present invention has the advantages that：
The beneficial effects of the present invention are：
The main sensor and auxiliary sensor of the present invention each has independent microcontroller, and main sensor and auxiliary sensor are being
System microcontroller is uniformly controlled under management and runs work alone；The emission array and reception battle array of the horizontal infrared light curtain of main sensor
Row are located at track both sides respectively, and the light that emission array is sent can sense vehicle and drive into information perpendicular to track longitudinal axis
With vehicle wheel base length information；One group of infrared light curtain sensor in two groups of infrared light curtain sensors of auxiliary sensor is indulged with track
Overlapped to center line, the light that this group of infrared light curtain sensor is sent can measure perpendicular to track longitudinal centre line and drive into car
Length, another group of infrared light curtain sensor, into right-angled intersection, can measure with previous group infrared light curtain sensor central point
Drive into the width of vehicle；When vehicle drives into infrared light curtain vehicle sensor, vehicle tyre successively blocks the light on main sensor
Quick diode array, the quantity for the neighboring photosensitive diode being blocked just represent the width of tire rolling road surface, two groups of quilts
It is exactly vehicle wheelbase to block neighboring photosensitive diode center positional distance；After main sensor senses vehicle wheelbase data, data
System microcontroller is fed back to, and starts the length and width data letter of auxiliary sensor start feeling measuring car by system microcontroller
Breath.
The present invention is more more convenient than using ground induction coil, and the vehicle into parking lot can use the auxiliary sensing along track longitudinal direction
Device forms the relay-type vehicle sensing system from entrance to parking stall, is easily aided with visible LED to guide parking, will make room
Interior parking stall navigation way is definitely clear, realizes one-to-one precision navigation service, solves conventional invention due to location algorithm, letter
The problem of reasons such as number intensity, signal stabilization cause positioning precision not high, whole process do not need map as carrier support,
User is quickly found out parking stall, cost savings the time.
【Brief description of the drawings】
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the main sensor operation principle of the present invention；
Fig. 3 is the sensor work period timing diagram of the present invention.
【Embodiment】
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This：
As Fig. 1 to Fig. 3, technical scheme are as follows：
The present invention infrared light curtain vehicle sensor by one group of horizontal infrared light curtain sensor and it is orthogonal two groups it is red
Outer light curtain sensor composition, horizontal light curtain sensor is by being separately mounted to the infrared LED emission array of track both sides and infrared connecing
Diode array composition is received, horizontal light curtain vehicle sensor is main sensor, and orthogonal two groups of infrared light curtain sensors are
Auxiliary sensor；
The light that horizontal infrared light curtain sensor infrared LED emission array is sent is perpendicular to track longitudinal axis, for feeling
Measuring car drives into information and vehicle wheel base length information, and horizontal infrared light curtain sensor by being located at the infrared of track both sides respectively
LED array and photodiode arrangement composition, infrared LED are mounted to linear light curtain emission array (spacing with 1~3 centimetre of spacing
1 centimetre, 2 centimetres or 3 centimetres can be specifically set to), photodiode is mounted to receive linear array with identical spacing dimension, from
Vehicle heading, successively according to 1,2,3 ..., N order obtains the coordinate (sequence number) of infrared LED and photodiode elements,
Wherein, N is positive integer；
Two groups of orthogonal infrared light curtain sensors are by infrared LED and photodiode to pipe and with 1~3 li of spacing
The meter ampere dress composition linear transceiver sensor array of infrared light curtain (spacing can specifically be set to 1 centimetre, 2 centimetres or 3 centimetres), wherein
One group of infrared light curtain sensor is perpendicular to track longitudinal centre line, another group of infrared light curtain sensor and previous group infrared light curtain sense
Device central point is surveyed to install into right-angled intersection；Two groups of orthogonal infrared light curtain sensors are the auxiliary sensor of vehicle sensor.
The infrared LED of auxiliary sensor is with photodiode also according to 1,2,3 ... N order of order encoder element coordinate (sequence number)；
The array of the infrared LED composition of main sensor uses intermittent work mode, and the array of photodiode composition uses
Sensing direct light mode works, respectively in the transmit cycle and closing cycle detection photodiode arrangement number of infrared LED array
According to；
Orthogonal two groups of auxiliary sensors use intermittent duty, and its photodiode arrangement receives car body reflection
Infrared ray, with collection vehicle information；Auxiliary sensor enters after horizontally disposed infrared light curtain sensor senses information of vehicles
Work, vehicle are stopped after rolling sensor away from.
The main and auxiliary sensor of vehicle sensor is formed respectively by respective microprocessor control, and by system microcontroller
Control, adjust the sensing work period of main and auxiliary sensor.
It is located at that the main and auxiliary sensor work period in different tracks is separate, the work period of main and auxiliary sensor is closed one
Play one sensor detection cycle of composition.The main and auxiliary sensor work period respectively accounts for three points of vehicle sensor detection work period
One of, and when main sensor is not detected by information of vehicles, auxiliary sensor is in halted state.
Vehicle sensor uses intermittent work mode, and its intermittent time is adjustable, each lane sensing with the detection cycle time
The detection work period of device is interleaved, prevents from producing interference when multilane from using between the sensor of adjacent lane.
The order for the N that the vehicle tyre of vehicle sensor driven into according to coordinate 1,2,3 ... successively blocks the light of main sensor
Quick diode, the quantity for the neighboring photosensitive diode being blocked just represent the width of tire rolling road surface, automobile front and back wheel
Two groups of photodiodes are blocked altogether, and the centre-to-centre spacing for the photodiode that two adjacent groups are blocked is exactly vehicle wheelbase；Main sensor
After sensing vehicle wheelbase data, wheelbase data feedback starts auxiliary sensor to system microcontroller, and by system microcontroller
Start auxiliary sensor sensing vehicle other data messages, the data message includes the length and width data message of vehicle.
Infrared vehicle sensor reads signal and the detection work week of non-detection work period in detection work period array
Phase signal.Detection working period signal is divided into main and auxiliary sensor infrared signal (LED transmit cycles) and non-LED transmit cycles again
Signal.The data that sensing data Main Basiss photodiode arrangement senses in transmit cycle, remaining signal is as background
Noise is used for the anti-interference calculating of sensing data signal；Sensor institute collection vehicle information is sent to system micro-control by data wire
Device processed is analyzed and processed and stored；Data communication is carried out using serial data communication mode, and is sent to by data wire
Position management system.
Embodiment
Hardware configuration is as shown in figure 1, the infrared light curtain vehicle sensor of the present embodiment includes：Main and auxiliary sensor and each
Microcontroller, and system microcontroller, system power supply.The microcontroller of main and auxiliary sensor respectively with system microcontroller
Between be connected with each other by serial data communication line, and leave the communication interface being connected with other computer systems, it is convenient and its
The connection of his equipment.
Main sensor forms emission array by infrared LED, forms receiving array by photodiode, and pass through main sensor
Microcontroller be controlled；As shown in Figure 2.Auxiliary sensor is by infrared LED emission array, infrared receiving diode and auxiliary sensing
The microcontroller of device is formed, the infrared LED on infrared LED emission array and the photodiode on infrared receiving diode array
It is set to form of tubes, auxiliary sensor has two, two infrared light curtain sensors that respectively vertical and horizontal are set, and therein one
Group infrared light curtain sensor is overlapped with track longitudinal centre line, and the light that this group of infrared light curtain sensor is sent is indulged perpendicular to track
To center line, the length for driving into vehicle can be measured, another group of infrared light curtain sensor with previous group infrared light curtain sensor
Heart point can measure the width for driving into vehicle into right-angled intersection.
Main and auxiliary sensor works under system microcontroller control, and its work schedule is as shown in Figure 3.The wherein He of period 2
Period 3 is the work period of the vehicle sensor on current lane, and auxiliary sensor is after main sensor senses and drives into vehicle
Start auxiliary sensor work, otherwise auxiliary sensor is in halted state.In the period 3, main and auxiliary sensor reads photodiode
Array signal, and record using the signal detected as background signal standby.Period Isosorbide-5-Nitrae is other track vehicle sensor works
Make the cycle, current lane vehicle sensor does not work.
Drive into the light of the infrared LED work period of the main sensor of vehicle tyre shield portions of vehicle sensor, main sense
Survey device foundation drives into vehicle tyre and blocks the number that main sensor successively blocks main sensor photodiode arrangement along travel direction
When amount and changing condition meet vehicle and drive into feature, i.e., by the photodiode arrangement sensing data and note of the main sensor read
After the background signal of record does calculus of differences, obtain tire and block the position of light curtain, quantity and continuity synthesis computing being blocked
Whether signal is that tire blocks light curtain signal, and then identifies whether to drive into sensor for vehicle.If being judged as, vehicle drives into, and starts
Auxiliary sensor detection, the car body geometry information of vehicle is driven into measurement.
Main sensor detects that vehicle drives into sensor, and while open the work of auxiliary sensor, starts main sensor sense
Measuring car wheel base dimension.
The vehicle wheelbase Ax survey calculation methods for driving into vehicle sensor are as follows：
The length Lt that tire blocks infrared light curtain can be obtained by the photodiode quantity statistics that is blocked, if Lt=n × Δ,
Wherein n is that tire blocks photodiode quantity, and Δ is photodiode clipping room away from (preceding spacing of having addressed is 1~3 li
Rice).Two groups of photodiodes that main sensor senses (being more than vehicle minimum wheelbase) at regular intervals sense that tire blocks
During state, start vehicle wheelbase survey calculation, if two groups of photodiode coordinates being blocked are respectively (2,2+n) and (Na, Na
+ n), then vehicle wheelbase Ax is
Ax=(Na-2) × Δ/100 (rice) (1)
The photodiode coordinate that second group (driving into vehicle sensor vehicle tyre afterwards) is blocked is (2,2+n), and head is sat
Mark can take the value more than 1, take 2 here to confirm that vehicle rear axle tire drives into sensor；Sense rear axle and drive into sensor
Afterwards, it is (Na, Na+n) to detect first group of photodiode coordinate being blocked, and Na first drives into sensor vehicle tyre and blocked
The coordinate of the previous photodiode that is not blocked of first group of n photodiode.
The Vehicle length La calculation formula for driving into sensor are
La=N1 × Δ/100 (rice) (2)
N1 is the photodiode quantity that length over ends of body sensor (vehicle reflected signal) senses signal.
The vehicle width Lw calculation formula for driving into sensor are
Lw=Nw × Δ/100 (rice) (3)
Nw is the photodiode quantity that width of the carbody sensor (vehicle reflected signal) senses signal.
The information of vehicles that vehicle sensor is collected is sent to system microcontroller by data wire and carried out at analysis
Reason and storage；Data communication is carried out using serial data communication mode, and is sent to upper management system by data wire.
With above-mentioned vehicle sensor operation principle, infrared light curtain vehicle sensor can be used in Entrance, parking
The various positions such as position and parking lot vehicle running path.
Above-mentioned vehicle sensor can also sense the arranging density for needing appropriate increase infrared light curtain and direction, to adapt to not
Needed with sensing.For example, when being applied to parking stall, if linear sensor array is changed into matrix, car can be not only sensed
Geometry information, can also sense whether storing cycle is rectified, prevent from stopping it is irregular cause parking stall to waste, Yi Jike
Loss caused by vehicle caused by energy scratches etc..
The beneficial effects of the present invention are：More more convenient than using ground induction coil, the vehicle into parking lot can use edge
The auxiliary sensor of track longitudinal direction forms the relay-type vehicle sensing system from entrance to parking stall, is easily aided with visible LED
To guide parking, indoor parking stall navigation way will be made definitely clear, realize one-to-one precision navigation service, solve tradition hair
It is bright due to the problem of reasons such as location algorithm, signal intensity, signal stabilization cause positioning precision not high, whole process need not
Map is supported as carrier, user is quickly found out parking stall, be cost savings the time.
Claims (10)
- A kind of 1. infrared light curtain vehicle sensor, it is characterised in that including：Main sensor, auxiliary sensor and system microcontroller, Main sensor and auxiliary sensor each have independent microcontroller, main sensor and auxiliary sensor unified in system microcontroller Work is run alone under control management；Main sensor includes one group of horizontal infrared light curtain sensor, the emission array and receiving array of horizontal infrared light curtain sensor Be located at track both sides respectively, the light that emission array is sent perpendicular to track longitudinal axis, can sense vehicle drive into information with Vehicle wheel base length information；Auxiliary sensor includes orthogonal two groups of infrared light curtain sensors, one group of infrared light in two groups of infrared light curtain sensors Curtain sensor overlaps with track longitudinal centre line, and the light that this group of infrared light curtain sensor is sent is perpendicular to track longitudinal center Line, can measure the length for driving into vehicle, another group of infrared light curtain sensor and previous group infrared light curtain sensor central point into Right-angled intersection, the width for driving into vehicle can be measured；The emission array and receiving array of the infrared light curtain sensor of auxiliary sensor It is set to form of tubes.
- 2. infrared light curtain vehicle sensor according to claim 1, it is characterised in that the transmitting battle array of infrared light curtain sensor Infrared LED emission array is classified as, receiving array is infrared receiving diode array；In main sensor, the infrared LED on infrared LED emission array is infrared to be equidistantly mounted to linear light curtain emission array Photodiode on reception diode array is mounted to receive linear array with identical spacing dimension；In auxiliary sensor, the infrared LED on infrared LED emission array is set with the photodiode on infrared receiving diode array For to form of tubes.
- 3. infrared light curtain vehicle sensor according to claim 2, it is characterised in that in main sensor, emission array The spacing of infrared LED and the spacing of the photodiode of receiving array are 1~3 centimetre；In auxiliary sensor, adjacent is infrared The spacing of LED and photodiode is 1~3 centimetre.
- A kind of 4. infrared light curtain vehicle method for sensing, it is characterised in that：First to the infrared LED of emission array and the photodiode of receiving array of the main sensor of infrared light curtain vehicle sensor From vehicle heading, successively according to 1,2,3 ..., N order is numbered, and N is positive integer, then the transmitting to auxiliary sensor The infrared LED of array and the photodiode of receiving array carry out serial number；Infrared LED and photosensitive two pole are obtained by numbering The coordinate of pipe；When vehicle drives into infrared light curtain vehicle sensor, vehicle tyre is according to 1,2,3 ... N order successively blocks main sensing The photodiode of device, the quantity of the neighboring photosensitive diode being blocked represent the width of tire rolling road surface, before automobile Trailing wheel blocks two groups of photodiodes altogether, and the centre-to-centre spacing for the photodiode that two adjacent groups are blocked is exactly vehicle wheelbase；Main sense After survey device senses vehicle wheelbase data, wheelbase data feedback to system microcontroller, auxiliary sensing is started by system microcontroller Device senses the length and width data message of vehicle.
- 5. infrared light curtain vehicle method for sensing according to claim 4, it is characterised in that the infrared LED battle array of main sensor Row use intermittent duty, and the photodiode arrangement of main sensor is worked using sensing direct light mode, in infrared LED battle array Row transmit cycle and closing cycle detection photodiode arrangement data.
- 6. infrared light curtain vehicle method for sensing according to claim 4, it is characterised in that auxiliary sensor includes being mutually perpendicular to Two groups of infrared light curtain sensors, two groups of infrared light curtain sensors use intermittent duty, two groups of infrared light curtain sensors Infrared LED emission array launches infrared ray to automobile, and the infrared ray of infrared receiving diode array received car body reflection gathers Information of vehicles；After the infrared light curtain sensor overlapped on auxiliary sensor with track longitudinal centre line senses information of vehicles, infrared light curtain car Sensor is started working, after vehicle rolls the infrared light curtain sensor overlapped with track longitudinal centre line away from, outer light curtain vehicle sense Device is surveyed to be stopped.
- 7. infrared light curtain vehicle method for sensing according to claim 4, it is characterised in that be located at the main sensing in different tracks The work period of device and auxiliary sensor is separate, and the work period of main sensor and auxiliary sensor is combined one inspection of composition Survey the cycle；The work period of main sensor and auxiliary sensor respectively account for infrared light curtain vehicle sensor detection the work period three/ One, and when main sensor is not detected by information of vehicles, auxiliary sensor is in halted state.
- 8. infrared light curtain vehicle method for sensing according to claim 4, it is characterised in that infrared light curtain vehicle sensor is adopted With intermittent duty, its intermittent time is adjustable with the detection cycle time, the detection of each track infrared light curtain vehicle sensor Work period is interleaved.
- 9. infrared light curtain vehicle method for sensing according to claim 8, it is characterised in that infrared light curtain vehicle sensor exists Detect the work period to read the signal of non-detection work period with array and detect the signal of work period, detection work period letter Number it is divided into infrared signal and non-LED transmit cycles signal and the infrared signal of auxiliary sensor and the non-LED transmitting weeks of main sensor Phase signal, sensing data are the data that photodiode arrangement senses in transmit cycle, and remaining signal is as background noise For the anti-interference calculating of sensing data signal.
- 10. infrared light curtain vehicle method for sensing according to claim 4, it is characterised in that main sensor and auxiliary sensor The information of vehicles collected is sent to system microcontroller by data wire, and system microcontroller is analyzed the information of vehicles Processing and storage；Data communication is carried out using serial data communication mode, and is sent to upper management system by data wire.
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| CN108981582A (en) * | 2018-08-10 | 2018-12-11 | 常州工学院 | A kind of Automobile shaft wheelbase detection device |
| CN109441169A (en) * | 2018-12-20 | 2019-03-08 | 芯球（上海）智能科技有限责任公司 | A kind of precisely parking alignment system |
| CN109979204A (en) * | 2019-04-02 | 2019-07-05 | 浙江多普勒环保科技有限公司 | Light cuts multilane speed and acceleration detecting and its method |
| CN113776430A (en) * | 2021-08-03 | 2021-12-10 | 邵阳先进制造技术研究院有限公司 | Dimension data processing method based on light curtain measurement |
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