CN111540229A - Parking space information guidance control system - Google Patents
Parking space information guidance control system Download PDFInfo
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- CN111540229A CN111540229A CN202010360014.XA CN202010360014A CN111540229A CN 111540229 A CN111540229 A CN 111540229A CN 202010360014 A CN202010360014 A CN 202010360014A CN 111540229 A CN111540229 A CN 111540229A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
- G08G1/141—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
- G08G1/145—Traffic control systems for road vehicles indicating individual free spaces in parking areas where the indication depends on the parking areas
- G08G1/146—Traffic control systems for road vehicles indicating individual free spaces in parking areas where the indication depends on the parking areas where the parking area is a limited parking space, e.g. parking garage, restricted space
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
- G08G1/145—Traffic control systems for road vehicles indicating individual free spaces in parking areas where the indication depends on the parking areas
- G08G1/148—Management of a network of parking areas
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- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Traffic Control Systems (AREA)
Abstract
A parking stall information guidance control system comprises a diffuse reflection infrared detection sensor, a signal acquisition processing module, a controller, a communication module and a data server; the diffuse reflection infrared detection sensor comprises a luminous body and a light receptor, and the luminous body and the light receptor are respectively connected to the signal acquisition processing module; the signal acquisition processing module is connected with the controller, and the controller is connected with the data server through the communication module; the diffuse reflection infrared detection sensors are arranged at four different positions of the parking space, and the luminous bodies emit light upwards; the controller judges the parking space state according to the on-off states of the four diffuse reflection infrared detection sensors collected by the signal collection processing module, the collected parking space state data are uploaded to the data server through the communication module, and the data server transmits the parking space state to the user terminal to guide the vehicle to park in a standard mode. The system realizes real-time detection of whether the motor vehicle is normally parked, and has the advantages of high detection speed, high accuracy and stable performance.
Description
Technical Field
The invention relates to a system for enabling a vehicle in a parking space to park in a standard mode in a parking lot, and belongs to the technical field of vehicle control in the parking space.
Background
Generally, the length and the width of a parking space of a parking lot of a residential area are respectively 5.0 meters multiplied by 2.6 meters, the parking lot is suitable for parking vehicles with the length of 4.9 meters and the width of 2.0 meters, and the vehicle is required to be wholly positioned in the parking space in the standard parking, and all parts do not exceed the boundary.
The traditional parking space navigation only adopts GPS/Beidou navigation to the position of a parking lot, then the parking space is searched manually in a visual distance range in a blind manner after the parking lot is entered. In this case, it is relatively easy to find the parking space if the parking lot is small, and it is relatively difficult to find the parking space if the parking lot is large and has a plurality of floors or underground. The traditional parking space detection uses a wireless geomagnetic technology or an ultrasonic technology, can only detect whether a motor vehicle stops at a parking space, and cannot judge whether the motor vehicle stops in a standard and in place.
CN110861581A discloses a system and a method for detecting the arrival and stop postures of buses, which comprises the following steps: the two groups of ultrasonic sensors are respectively arranged on the parking side of the vehicle and are adjacent to the body of the front wheel and the body of the rear wheel; the early warning module is used for giving an early warning prompt when the parking posture of the vehicle is judged to be unqualified; the ECU module is used for judging the arrival state of the vehicle according to the vehicle state information, and if the arrival state is judged, the ECU module enters an arrival gesture detection preparation state; judging the parking state of the vehicle, if the vehicle is judged to be parked, starting detection, respectively calculating the distance information between the front wheels and the rear wheels of the vehicle and the platform road edge, judging the parking posture of the bus according to the distance information, judging whether the difference value between the distances between the front wheels and the rear wheels of the vehicle and the platform road edge exceeds a set threshold value, and if the difference value exceeds the set threshold value, judging that the parking posture of the vehicle is unqualified. However, the system and the method only use the ultrasonic sensor to detect the buses with wider parking areas and larger body sizes, judge the parking postures of the buses widely, and are not suitable for detecting the cars with smaller body sizes in the parking lot with dense parking spaces.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the parking space information induction control system which can detect and judge whether the motor vehicle is standard in the parking space, and has the advantages of high detection speed, high accuracy and stable performance.
The parking stall information guidance control system adopts the following technical scheme.
The system comprises a diffuse reflection infrared detection sensor, a signal acquisition processing module, a controller, a communication module and a data server; the diffuse reflection infrared detection sensor comprises a luminous body and a light receptor, and the luminous body and the light receptor are respectively connected to the signal acquisition processing module; the signal acquisition processing module is connected with the controller, and the controller is connected with the data server through the communication module; the diffuse reflection infrared detection sensors are arranged at four different positions of the parking space, and the luminous bodies emit light upwards;
the controller judges the parking space state according to the on-off states of the four diffuse reflection infrared detection sensors acquired by the signal acquisition and processing module, and uploads the parking space state to the data server through the communication module, and the data server transmits the parking space state to a user terminal (a vehicle owner or a driver mobile phone) to guide the vehicle to park in a standard mode.
The infrared beam emitted by the luminous body is modulated by frequency, the modulation frequency is generally 35KHz, and the luminous body implements corresponding frequency detection.
After the light receptor receives the infrared light beam signal reflected by the light emitter (the light beam emitted by the light emitter is blocked by a vehicle), the parking space state signal output by the acquisition and processing module is '0', and if the light receptor does not receive the reflected infrared light beam of the light emitter, the parking space state signal output by the signal acquisition and processing module is '1'.
The parking space length and width are 5.0 meters and 2.6 meters respectively, two diffuse reflection infrared detection sensors in four different positions are arranged on a central line between two width boundaries of the parking space and are 90 centimeters away from the nearest width boundary, and the other two diffuse reflection infrared detection sensors are arranged on a central line between two length boundaries of the parking space and are 100 centimeters away from the nearest length boundary. The parking device is suitable for the standard parking of vehicles with the length of 4-4.9 meters and the width of 1.7-2.0 meters.
The controller adopts a single chip microcomputer and is used for outputting the using state induction information of the parking space.
The communication module adopts a 4G wireless communication module.
The signal acquisition processing module comprises a modulation circuit, a carrier frequency circuit, a demodulation circuit, a frequency division circuit and a decoding circuit; the modulation circuit and the carrier frequency circuit are used for modulating infrared light emitted by the luminous body, and the demodulation circuit, the frequency division circuit and the decoding circuit are used for frequency demodulation and detection; the modulation circuit superposes the parking space signal on the carrier frequency circuit, and the parking space signal and the carrier frequency signal are superposed into a mixed signal with long transmission distance and strong anti-interference capability; the light receptor receives the modulated infrared light signal and carries out on-state conversion through the demodulation circuit, the frequency division circuit and the decoding circuit.
The controller judges the parking space state according to the received parking space state signals output by the signal acquisition processing module, if the parking space state is standard parking when four '0's are received, the parking space state is idle when four '1's are received, and if the parking space state is not standard parking under the other conditions (both '0' and '1').
The invention judges whether the vehicle is parked or not by emitting infrared light upwards and modulating the light-emitting body and receiving the reflected infrared light by the light-receiving body, thereby realizing the real-time detection of whether the motor vehicle is normally parked or not, and having the advantages of high detection speed, high accuracy, stable and reliable performance and low price.
Drawings
Fig. 1 is a schematic view of the structural principle of the parking space information guidance control system of the present invention.
Fig. 2 is a schematic diagram of arrangement positions of diffuse reflection infrared detection sensors in a parking space.
Fig. 3 is a schematic circuit diagram of a parking space detection diffuse reflection infrared sensor and a signal acquisition processing module according to the invention.
Fig. 4 is a schematic diagram of a diffuse reflection infrared detection sensor in which a light emitter emits infrared light and a light receiver receives the infrared light.
Fig. 5 is a flowchart of a parking space detection control process according to the present invention.
Fig. 6 is a schematic diagram of a parking space information acquisition and guidance process in the present invention.
Fig. 7 is an expanded schematic view of the parking space information acquisition terminal in the invention.
In the figure: 1. a diffuse reflection infrared detection sensor; 2. a signal acquisition processing module; 3. a controller; 4. a communication module; 5. a data server; 6. a light emitter; 7. a photoreceptor; 8. a demodulation circuit; 9. a carrier frequency circuit; 10. a modulation circuit; 11. a frequency dividing circuit; 12. a decoding circuit.
Detailed Description
As shown in fig. 1, the parking space information guidance control system of the present invention comprises a diffuse reflection infrared detection sensor 1, a signal acquisition and processing module 2, a controller 3, a communication module 4 and a data server 5, which are connected in sequence. The controller 3 adopts a single chip microcomputer and is used for outputting parking space state induction information. The communication module 4 adopts a 4G wireless communication module.
The system is suitable for underground or overground parking lots in residential districts, and vehicles with the length of 4-4.9 meters and the width of 1.7-2.0 meters can be parked according to standards. As shown in fig. 2, the parking spaces are 5.0 meters and 2.6 meters in length and width, and four diffuse reflection infrared detection sensors 1 are disposed at different positions in the parking spaces. Two diffuse reflection infrared detection sensors are arranged on a central line between two width boundaries of a parking space, the distance between each diffuse reflection infrared detection sensor and the nearest width boundary is 90 centimeters, two diffuse reflection infrared detection sensors are arranged on a central line between two length boundaries of the parking space, and the distance between each diffuse reflection infrared detection sensor and the nearest length boundary is 100 centimeters. It was thus determined that the length and width of the vehicle were not more than 4.9 meters and 2.0 meters, and not less than 4 meters and 1.7 meters, respectively (minimum vehicle length: 5.0 meters-1.0 meters-4.0 meters, minimum vehicle width: 2.6 meters-0.9 meters-1.7 meters).
As shown in fig. 3, the diffuse reflection infrared detection sensor 1 is connected to the signal acquisition and processing module 2, and the signal acquisition and processing module 2 includes a demodulation circuit 8, a carrier frequency circuit 9, a modulation circuit 10, a frequency division circuit 11, and a decoding circuit 12. The demodulation circuit 8 is an IC3, the carrier frequency circuit 9 is an IC2, the modulation circuit 10 is an IC1, the frequency division circuit 11 is an IC4, and the decoding circuit 12 is an IC 5.
The diffuse reflection infrared detection sensor 1 adopts an infrared photoelectric switch, comprises a luminous body 6 (an infrared light emitting diode) and a light receptor 7 (an infrared receiving diode), and detects the existence of an object by utilizing the shading reflection of the detected object to an infrared light beam and gating by a synchronous circuit. The luminous body 6 continuously emits modulated infrared light, the light receptor 7 receives infrared light signals, and the luminous body 6 and the light receptor 7 are respectively connected to the signal acquisition processing module 2 in two paths.
As shown in fig. 4, the light emitting body 6 of the diffuse reflection infrared detection sensor 1 emits light upward, and the light receiving body 7 receives infrared light emitted by the light emitting body 6 and reflected back after being shielded by a vehicle (the effective emission distance of the infrared light emitted by the light emitting body 6 is 100 cm). When a vehicle blocks between the light emitter 6 and the light receptor 7, the output of the signal acquisition processing module 2 is 0, otherwise, the output is 1.
In order to enable the photoreceptor 7 of the diffuse reflection infrared detection sensor 1 to distinguish between a valid infrared signal and infrared radiation in the background environment, and thus to provide a detection range with good results, the infrared beam emitted by the luminophore 6 is modulated by a modulation circuit 10, and the received portion of the photoreceptor 7 is demodulated, divided and decoded by a corresponding demodulation circuit 8, frequency division circuit 11 and decoding circuit 12. The infrared beam emitted by the light emitter 6 may be modulated using a continuous tone signal or a tone pulse frequency modulated signal. The infrared modulation frequency is generally 35KHz, so that interference signals beyond 35KHz can be filtered, and the detection is more accurate and reliable. The modulation of the infrared light beams can inhibit the inherent noise of each link such as a modulation circuit, a carrier frequency circuit and the like and the interference of an external electromagnetic field in the signal acquisition process, and has higher detection capability.
The modulation circuit 10 and the carrier frequency circuit 9 are used for modulating the infrared light emitted from the light emitting body 6, and the demodulation circuit 8, the frequency dividing circuit 11, and the decoding circuit 12 are used for frequency demodulation detection.
The modulation circuit 10 superimposes the detection signal of the diffuse reflection infrared detection sensor 1 on the carrier frequency circuit 9, and the detection signal and the carrier frequency signal are superimposed to form a mixed signal with long transmission distance and strong anti-interference capability. The light receiver 7 receives the diffuse reflection infrared light signal, and performs state conversion through the demodulation circuit 8, the frequency division circuit 11, and the decoding circuit 12.
The infrared light emission circuit of the diffuse reflection infrared detection sensor 1 consists of two 555 time-base circuits which respectively generate 1.5KHz modulation pulse and 35KHz carrier frequency pulse. The 1.5KHZ modulation pulse oscillator is composed of a modulation circuit 10(IC1), R9, R13 and D5, wherein D5 is used for adjusting the duty ratio of a pulse period, D5 is forward biased when C19 is charged, and the charging current direction is as follows: power → R9 → D5 → C19, charging time constant T1 ≈ R9C19, D5 is reverse biased when C19 discharges, and the discharging current direction is: c19 → R13 → 7 feet → ground, and discharge time constant T2 ═ R13C 19. R13 ≈ 3R9, so about 1:15 duty cycle output pulse.
A35 KHZ carrier frequency pulse oscillator is composed of a modulation circuit 9(IC2), R11, R12 and C18, and is controlled by an IC1, when the 3 pin of an IC1 is at a high level, the IC2 oscillates and outputs 35KHZ carrier frequency pulses, and when the 3 pin of an IC1 is at a low level, the IC2 stops oscillating and has no output. When IC2 oscillates, its output turns transistor VT1 on and off at 35KHZ frequency, and drives infrared tube HD1 to send out infrared control pulse signal. The resistor R14 limits the drive current of the two infrared light emitting tubes (light emitting bodies 6) to about 1A, and the duty ratio of the transmitted carrier frequency pulse is 1:15, so the average consumed current of the circuit is still small.
IC3 is an infrared receiving pre-amplifier circuit μ PC1373H, which modulates the receiving frequency to 35KHZ, and outputs 1.5KHZ modulated signal by 1 pin after internal amplification and detection. IC4 is a toggle flip-flop consisting of a dual D flip-flop 4013 that acts as a frequency divider that outputs one pulse at 1 pin for every two pulses input. The 1.5KHZ modulated signal is divided by IC4 to obtain 750Hz pulse signal. And the audio signal is subjected to amplitude limiting by D8 and D9 and is coupled to an IC5 audio decoder LM567 through C27, when the 3 pin of a person input end of the LM567 inputs an audio signal of 750HZ, the 8 pin of an output end outputs low level, and the output pulse width is expanded to about 1.5 seconds through C26 and C30. That is, the low level turns on the driver transistor VT2, and outputs a high level.
Signal transmission to controller 3 after signal acquisition processing module 2 will handle, controller 3 judges the parking stall state according to the on off state that sets up the infrared detection sensor 1 of diffuse reflection in four different positions in parking stall perpendicularly, 0000 is standard parking (four infrared detection sensor's of diffuse reflection luminous body are sheltered from by the vehicle entirely, the photic reverberation of photic body is received to the photic body), 1111 is the vacant parking stall (four infrared detection sensor's of diffuse reflection luminous body all do not receive the reverberation of luminous body), other states are unnormalized parking (four infrared detection sensor's of diffuse reflection luminous body part is sheltered from by the vehicle). Referring to fig. 3, the controller 3 operates as follows.
As shown in fig. 5: after power-on, initialization is performed first, then acquisition time is waited for, the controller 3 reads the port state acquired by the signal acquisition processing module 2, the controller 3 compares the newly read state with the original state, and if there is a change, it is determined whether there is a change from no car to a car in the parking space? If the parking is standardized, judging whether the parking is standardized according to the state value, if the parking is standardized, uploading the data to the data server 5, and then returning to the waiting for the acquisition time I. If the parking is not the standard parking, the data is uploaded to the data server 5, and the driver or the vehicle owner is informed of 'please specify parking' until the driver or the vehicle owner specifies parking. And then returning to the waiting acquisition time I, circulating in sequence, judging whether the vehicle is changed from no vehicle to the vehicle, and uploading the data to the data server 5 if the vehicle is changed from no vehicle to the vehicle. Then, the program returns to wait for the acquisition time (r), and cycles sequentially. If the state value acquired by the controller 3 is '1111', the parking space is free, if the state value acquired by the controller 3 is '0000', the parking space is 'standard parking', and if the state value acquired by the controller 3 is not all '0' or not all '1', the parking space is staggered parking.
As shown in fig. 6, the controller 3 uploads parking space parking information to the data server 5 through the communication module 4, and the data server 5 pushes information such as nonstandard parking space parking and misplaced parking to the user mobile phone terminal in a short message WeChat mode to guide the user vehicle to park normally.
As shown in fig. 7, if the parking spaces in the garage are more, a plurality of parking space information collecting terminals (controller 3) need to be used, and if each parking space information collecting terminal is equipped with a wireless communication module, the use cost is increased greatly. In order to solve the problem, the parking space management terminal can be managed in a layered mode, can be connected with a plurality of (at most 256) parking space information acquisition terminals (controllers) through an R485 bus, and then is connected with the data server 5 through the communication module 4, and effective information transmission is achieved.
The invention realizes the guidance of the information induction control of the parking lot by a photoelectric acquisition technology and a transmission control technology, has obvious effect compared with the prior art, and is shown in the following table.
Claims (7)
1. A parking stall information guidance control system is characterized by comprising a diffuse reflection infrared detection sensor, a signal acquisition processing module, a controller, a communication module and a data server; the diffuse reflection infrared detection sensor comprises a luminous body and a light receptor, and the luminous body and the light receptor are respectively connected to the signal acquisition processing module; the signal acquisition processing module is connected with the controller, and the controller is connected with the data server through the communication module; the diffuse reflection infrared detection sensors are arranged at four different positions of the parking space, and the luminous bodies emit light upwards;
the controller judges the parking space state according to the on-off states of the four diffuse reflection infrared detection sensors acquired by the signal acquisition and processing module, and uploads the parking space state to the data server through the communication module, and the data server transmits the parking space state to the user terminal to guide the vehicle to park in a standard mode.
2. The carport information guidance control system according to claim 1, characterized in that: the infrared light beam emitted by the luminous body is modulated by frequency, and the modulation frequency is 35 KHz.
3. The carport information guidance control system according to claim 1, characterized in that: after the light receptor receives the infrared beam signal reflected by the light emitter, the parking space state signal output by the signal acquisition and processing module is '0', otherwise, the parking space state signal is '1'.
4. The carport information guidance control system according to claim 1, characterized in that: the parking space length and width are 5.0 meters and 2.6 meters respectively, two diffuse reflection infrared detection sensors in four different positions are arranged on a central line between two width boundaries of the parking space and are 90 centimeters away from the nearest width boundary, and the other two diffuse reflection infrared detection sensors are arranged on a central line between two length boundaries of the parking space and are 100 centimeters away from the nearest length boundary.
5. The carport information guidance control system according to claim 1, characterized in that: the controller adopts a single chip microcomputer and is used for outputting the using state induction information of the parking space.
6. The carport information guidance control system according to claim 1, characterized in that: the signal acquisition processing module comprises a modulation circuit, a carrier frequency circuit, a demodulation circuit, a frequency division circuit and a decoding circuit; the modulation circuit and the carrier frequency circuit are used for modulating infrared light emitted by the luminous body, and the demodulation circuit, the frequency division circuit and the decoding circuit are used for frequency demodulation and detection; the modulation circuit superposes the parking space signal on the carrier frequency circuit, and the parking space signal and the carrier frequency signal are superposed into a mixed signal with long transmission distance and strong anti-interference capability; the light receptor receives the modulated infrared light signal and carries out on-state conversion through the demodulation circuit, the frequency division circuit and the decoding circuit.
7. The carport information guidance control system according to claim 1, characterized in that: the controller judges the parking space state according to the received parking space state signal output by the signal acquisition processing module, if the parking space state is standard parking when four '0's are received, the parking space state is idle when four '1's are received, and the parking space state is not standard parking under other conditions.
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| CN202010360014.XA CN111540229A (en) | 2020-04-29 | 2020-04-29 | Parking space information guidance control system |
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| CN202010360014.XA CN111540229A (en) | 2020-04-29 | 2020-04-29 | Parking space information guidance control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113903190A (en) * | 2021-10-21 | 2022-01-07 | 江苏食品药品职业技术学院 | Wisdom parking area management device based on thing networking |
| CN116453370A (en) * | 2023-04-17 | 2023-07-18 | 广东科陆智泊信息科技有限公司 | Parking posture correction system and method thereof |
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Application publication date: 20200814 |