CN105427627A - Method for vehicle flow detection at entrance and exit of parking lot and system of same - Google Patents
Method for vehicle flow detection at entrance and exit of parking lot and system of same Download PDFInfo
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- CN105427627A CN105427627A CN201510974311.2A CN201510974311A CN105427627A CN 105427627 A CN105427627 A CN 105427627A CN 201510974311 A CN201510974311 A CN 201510974311A CN 105427627 A CN105427627 A CN 105427627A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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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
- G08G1/149—Traffic control systems for road vehicles indicating individual free spaces in parking areas coupled to means for restricting the access to the parking space, e.g. authorization, access barriers, indicative lights
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Abstract
The invention relates to a method for vehicle flow detection at an entrance and an exit of a parking lot and a system of the same. The method comprises the steps that (1) ADC data under a no-vehicle state is collected, and the data is used to realize initial calculation of an initial value; (2) when an electric signal indicating that a gate rod at the entrance or the exit of the parking lot is lifted is received, ADC sampling will be started, sampled data will be added into a buffer area, and a voltage average in the buffer area is calculated; (3) an average of the ADC data in the buffer area is calculated according to ADC data values which are sampled and read continuously, so that whether a vehicle state or the no-vehicle state exists is determined; and (4) a vehicle flow detection system sends vehicle pass state information to a could terminal server via a serial-port transparent transmission GPRS module. The system comprises an MCU processor module, a rod lifting detection module, a distance sensor module and the serial-port transparent transmission GPRS module. The method provided by the invention can accurately count a vehicle flow at the entrance and the exit of the parking lot so as to provide an effective solution for quantity statistics of static traffic parking lot stalls in an intelligent traffic system.
Description
Technical field
The invention belongs to traffic flow detecting method and system thereof, be specifically related to one and park gateway traffic flow detecting method and a system thereof.
Background technology
Along with the surge of rapid development of economy and automobile quantity, traffic congestion, traffic hazard to take place frequently etc. and cause increasing time waste, property loss and environmental pollution, and traffic problems have become one of difficult problem of the countries in the world government facing comprising China.In order to alleviate the pressure that economic development brings to communications and transportation, existing resource is made to have given play to ceiling effect, the Chinese government increases research to intelligent transportation system and construction dynamics, and vacant parking stall, field of parking number accurate statistics and a gateway vehicle Flow Detection of parking are a research basic and the most crucial in the static traffic direction in intelligent transportation.
A gateway vehicle flowrate of parking conventional in the world mainly contains ground induction coil, geomagnetic field sensors, video image and frequency microwave technology.Ground induction coil accuracy is high, structure simple, but needs the reasons such as cutter road to apply due to installation and maintenance; The also higher and structure of geomagnetic field sensors accuracy is simple, but also needs a park road surface, gateway and needs of destruction to dig timing and change the reason obstructions such as battery maintenance is more complicated and apply when installing; Video detector cost high and under night and bad weather circumstances accuracy in detection low; Microwave is applied to the Bus-Speed Monitoring of fastlink mostly, easy for installation, but easily by surrounding environment influence, not easily promotes.
The counting to physics is achieved based on infrared ray intelligent counter employing infrared emission mode, but the gateway car statistics accuracy thus impact is parked that also can produce error count when the object such as people, tricycle is come in and gone out and parked entrance, all there is larger defect in a therefore current gateway method for detecting passing of vehicles of parking.
Summary of the invention
In order to solve the problems referred to above that prior art exists, the invention provides one and to park gateway traffic flow detecting method and a system thereof.Based on the vehicle passing detection algorithm of range sensor, can calculate for the vehicle flowrate passed through in a gateway of parking preferably, simultaneously vehicle flow detection system detects arguing for the sake of arguing and to combine the interference avoided preferably because people, tricycle or other objects bring based on the vehicle passing detection algorithm of range sensor, improves the accuracy in detection of vehicle flow detection system.
The technical solution adopted in the present invention is:
One is parked a gateway traffic flow detecting method, and its improvements are: described method comprises
(1) gather without the adc data under car state and use these data to carry out initialization calculating initial value;
(2) receive when parking the electric signal that gateway gate bar lifts, start ADC sampling and also the data obtained of sampling are joined in buffer zone, calculate the average voltage in buffer zone simultaneously;
(3) by the adc data value that continuous sampling is read, calculate the mean value of adc data in buffer zone, be judged as car state or without car state;
(4) status information that vehicle is passed through by serial ports transparent transmission GPRS module by vehicle flow detection system is sent in cloud server.
Optionally, described step (1) comprises vehicle flow detection system and starts rear initialization, gather the ADC value without range sensor under car state, sampling is got time adc data and is calculated, on average obtain without the average voltage under car state, and the duty of current vehicle flow quantity detecting system is switched to without car state, system enters dormant state after initialization completing.
Optionally, described step (2) comprise vehicle flow detection system receive park the electric signal that gateway gate bar lifts time, start range sensor and carry out ADC sampling, and the data obtained of sampling are joined in buffer zone, calculate the average voltage in buffer zone simultaneously; If average voltage is higher than the threshold value preset, then to the Count of Status variable of car may be had to add 1.
Optionally, described step (3) comprises adc data value that continuous sampling reads and calculates the mean value of adc data in buffer zone, if the mean value of adc data exceedes without the fixing continuous several times of threshold value of the ADC initial value under car state one, current state is switched to car state, otherwise has kept current state constant; If current state, lower than without the fixing continuous several times of threshold value of the ADC initial value under car state one, is switched to without car state by the mean value of adc data, otherwise keep current state constant.
Further, if the value of the Count of Status of car may be had continuously more than the threshold value of a counting, then the duty of vehicle flow detection system has been switched to car state; If intermediate detection to the average voltage in buffer zone lower than with the threshold value sum preset, then the duty of vehicle flow detection system is switched to without car state, the Count of Status value of car may be had simultaneously to reset to 0.
Further, if the average voltage of the range sensor output voltage collected lower than with the threshold value sum preset, current state is without car state, then continue to gather the output voltage values of range sensor; If current state is for there being car state, then to adding 1 without the Count of Status variable of car;
If threshold value may be exceeded without the count value of the Count of Status variable of car continuously, then the current operating state of vehicle flow detection system is switched to without car state by there being car state; If having under car state, may not exceed threshold value without the Count of Status variable of car, and average voltage higher than with the threshold value sum preset, then the possible Count of Status variable without car will be set to 0.
Optionally, described step (4) is included in vehicle flow detection system by being switched to car state without car state again from the condition having car state to be switched to without car state, and the status information that vehicle is passed through by serial ports transparent transmission GPRS module by described vehicle flow detection system is sent in cloud server.
The one that the present invention is based on another object provides is parked a gateway vehicle flow detection system, and its improvements are: described system comprises MCU processor module, detection module of arguing for the sake of arguing, distance sensor module and serial ports transparent transmission GPRS module;
Described detection module of arguing for the sake of arguing is for being connected vehicle flow detection system with gate bar signal wire;
Described argue for the sake of arguing detection module for detect gate bar lift and fall produce electric signal be input in MCU processor module;
Range information for detecting the distance of the physics in certain limit from sensor, and is converted to information of voltage and is input in the ADC unit of MCU processor module by described distance sensor module;
Described MCU processor module is used for the sampling starting according to the information of gate road bar input or stop to ADC, and the vehicle be identified by by vehicle passing detection algorithm the information of vehicles passed through is sent in the cloud server of specifying by serial ports transparent transmission GPRS module.
Beneficial effect of the present invention is:
The signal wire that the present invention only needs the power supply at connection gate road junction in installation and deployment, gate is argued for the sake of arguing and the bar that falls detects, just can directly use, thus avoid the damaged inconvenience brought with the user that parks to a unit of operation that parks in ground that the road reformation of gateway is caused, thus enormously simplify and install and dispose flow process, can be easier to obtain the accreditation of user and more easily apply;
Vehicle flow detection system combines to argue for the sake of arguing to detect and avoid wrong identification that infrared emission scheme brings because of people, tricycle and other objects and the number of times of many cars foundations being argued for the sake of arguing that acceleration transducer brings based on the vehicle passing detection algorithm of distance and is identified as the problem that a car passes through, improve the accuracy rate of vehicle count, to park accurately the vacant parking stall measure scheme in field for the static traffic scheme in intelligent transportation provides one;
The present invention can in all field energy promotion and application enough preferably of parking, and the vehicle flowrate of a gateway of parking can accurately be added up, thus the vacant parking stall quantity of parking in field is provided accurately, reference is accurately provided, for the parking stall quantity statistics of parking of the static traffic in intelligent transportation system provides good solution for vehicle flowrate guides.
Accompanying drawing explanation
Fig. 1 is that one provided by the invention is parked a gateway traffic flow detecting method schematic flow sheet;
Fig. 2 is that one provided by the invention is parked a gateway vehicle flow detection system structural representation.
Embodiment
As shown in Figure 1, the invention provides one and to park a gateway vehicle flow detection algorithm, idiographic flow is as follows:
Step one: after vehicle flow detection system starts, initialization is without the ADC value of the range sensor gathered under car state, in view of the interference existed in system electrification process, vehicle flow detection system adopts the data gathering time ADC upon actuation, after getting, time sampled data calculates, on average obtain without the average voltage under car state, and the duty of current vehicle flow quantity detecting system is switched to without car state, system enters dormant state after initialization completing;
Step 2: vehicle flow detection system receive park the electric signal that gateway gate bar lifts time, start range sensor and carry out ADC sampling, and the data obtained of sampling are joined in buffer zone, calculate the average voltage in buffer zone simultaneously, if average voltage is higher than the threshold value preset, then to the Count of Status variable of car may be had to add 1;
Step 3: if the value of the Count of Status of car may be had continuously more than the threshold value of a counting, then the duty of vehicle flow detection system is switched to car state, if intermediate detection to the average voltage in buffer zone lower than with the threshold value sum preset; again the duty of vehicle flow detection system is switched to without car state, the Count of Status value of car may be had simultaneously to reset to 0;
Step 4: if the average voltage of the range sensor output voltage collected lower than with the threshold value sum preset, if current state is without car state, then continue to gather the output voltage values of range sensor; If current state is for there being car state, then to adding 1 without the Count of Status variable of car;
If threshold value may be exceeded without the count value of the Count of Status variable of car continuously, then the current operating state of vehicle flow detection system is switched to without car state by there being car state; If having under car state, may not exceed threshold value without the Count of Status variable of car, and average voltage higher than with the threshold value sum preset, then the possible Count of Status variable without car will be set to 0.
Step 5: at vehicle flow detection system by being switched to car state without car state again from the condition having car state to be switched to without car state, the status information that vehicle is passed through by serial ports transparent transmission GPRS module by described vehicle flow detection system is sent in cloud server.
As shown in Figure 2, one provided by the invention is parked a gateway vehicle flow detection system, mainly comprises MCU processor module, detection module of arguing for the sake of arguing, distance sensor module and serial ports transparent transmission GPRS module;
Argue for the sake of arguing detection module for being connected with gate bar signal wire by vehicle flow detection system, electric signal be produced to MCU processor when the road bar at gate road junction lifts or falls, MCU processor is switched to duty from dormant state after receiving electric signal, and Real-time Collection adc data;
The range information detected, for detecting the distance of the physics in certain limit from sensor, is converted to information of voltage by opto-electronic conversion by distance sensor module, and is input to MCU processor by adc data;
Serial ports transparent transmission GPRS module is used for the data that MCU processor is sent by serial ports to be sent in the data of high in the clouds by GPRS network;
The main operational vehicle of MCU processor module passes through detection algorithm, the range information gathering or stop to gather range sensor collection is started under the trigger condition of detection of arguing for the sake of arguing, and by algorithm, the information of vehicle flowrate detected is sent to serial ports transparent transmission GPRS module by serial ports by vehicle wherein, serial ports transparent transmission GPRS module by vehicle flowrate data upload in the backstage cloud server of specifying;
After vehicle flow detection system starts, initialization is without the ADC sampled value detected under car state, in system operation, under bar lifting status, system starts ADC sampling process, if vehicle is by the change of the ADC value that ADC range sensor can be caused to gather generation when arguing for the sake of arguing, vehicle flow detection algorithm recognize vehicle by time vehicle flowrate counted and uploads to counting the dynamic change that cloud server realizes vehicle flowrate by serial ports transparent transmission GPRS module.
In order to improve the accuracy that trafficability detects, gate road junction argue and the bar signal wire that falls is connected to vehicle flow detection system, when the road bar lifting status at gate road junction start detection algorithm carry out vehicle passing detection algorithm carry out detecting and counting and in road bar full state time stop detection algorithm, thus largely reduce the error-detecting of module to the object such as people, tricycle, improve the detection accuracy that vehicle passes through.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (8)
1. to park a gateway traffic flow detecting method, it is characterized in that: described method comprises
(1) gather without the adc data under car state and use these data to carry out initialization calculating initial value;
(2) receive when parking the electric signal that gateway gate bar lifts, start ADC sampling and also the data obtained of sampling are joined in buffer zone, calculate the average voltage in buffer zone simultaneously;
(3) by the adc data value that continuous sampling is read, calculate the mean value of adc data in buffer zone, be judged as car state or without car state;
(4) status information that vehicle is passed through by serial ports transparent transmission GPRS module by vehicle flow detection system is sent in cloud server.
2. one according to claim 1 is parked a gateway traffic flow detecting method, it is characterized in that: described step (1) comprises vehicle flow detection system and starts rear initialization, gather the ADC value without range sensor under car state, sampling is got time adc data and is calculated, on average obtain without the average voltage under car state, and the duty of current vehicle flow quantity detecting system is switched to without car state, system enters dormant state after initialization completing.
3. one according to claim 1 is parked a gateway traffic flow detecting method, it is characterized in that: described step (2) comprise vehicle flow detection system receive park the electric signal that gateway gate bar lifts time, start range sensor and carry out ADC sampling, and the data obtained of sampling are joined in buffer zone, calculate the average voltage in buffer zone simultaneously; If average voltage is higher than the threshold value preset, then to the Count of Status variable of car may be had to add 1.
4. one according to claim 1 is parked a gateway traffic flow detecting method, it is characterized in that: described step (3) comprises adc data value that continuous sampling reads and calculates the mean value of adc data in buffer zone, if the mean value of adc data exceedes without the fixing continuous several times of threshold value of the ADC initial value under car state one, current state is switched to car state, otherwise has kept current state constant; If current state, lower than without the fixing continuous several times of threshold value of the ADC initial value under car state one, is switched to without car state by the mean value of adc data, otherwise keep current state constant.
5. one according to claim 4 is parked a gateway traffic flow detecting method, it is characterized in that: if may have the value of the Count of Status of car continuously more than the threshold value of a counting, then the duty of vehicle flow detection system has been switched to car state; If intermediate detection to the average voltage in buffer zone lower than with the threshold value sum preset, then the duty of vehicle flow detection system is switched to without car state, the Count of Status value of car may be had simultaneously to reset to 0.
6. one according to claim 4 is parked a gateway traffic flow detecting method, it is characterized in that: if the average voltage of the range sensor output voltage collected lower than with the threshold value sum preset, current state is without car state, then continue the output voltage values gathering range sensor; If current state is for there being car state, then to adding 1 without the Count of Status variable of car;
If threshold value may be exceeded without the count value of the Count of Status variable of car continuously, then the current operating state of vehicle flow detection system is switched to without car state by there being car state; If having under car state, may not exceed threshold value without the Count of Status variable of car, and average voltage higher than with the threshold value sum preset, then the possible Count of Status variable without car will be set to 0.
7. one according to claim 1 is parked a gateway traffic flow detecting method, it is characterized in that: described step (4) is included in vehicle flow detection system by being switched to car state without car state again from the condition having car state to be switched to without car state, and the status information that vehicle is passed through by serial ports transparent transmission GPRS module by described vehicle flow detection system is sent in cloud server.
8. to park a gateway vehicle flow detection system, it is characterized in that: described system comprises MCU processor module, detection module of arguing for the sake of arguing, distance sensor module and serial ports transparent transmission GPRS module;
Described detection module of arguing for the sake of arguing is for being connected vehicle flow detection system with gate bar signal wire;
Described argue for the sake of arguing detection module for detect gate bar lift and fall produce electric signal be input in MCU processor module;
Range information for detecting the distance of the physics in certain limit from sensor, and is converted to information of voltage and is input in the ADC unit of MCU processor module by described distance sensor module;
Described MCU processor module is used for the sampling starting according to the information of gate road bar input or stop to ADC, and the vehicle be identified by by vehicle passing detection algorithm the information of vehicles passed through is sent in the cloud server of specifying by serial ports transparent transmission GPRS module.
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| CN201510974311.2A CN105427627B (en) | 2015-12-22 | 2015-12-22 | One kind is parked entrance traffic flow detecting method and its a system |
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| CN107403474A (en) * | 2017-07-26 | 2017-11-28 | 广东兴达顺科技有限公司 | One kind charge processing method and smart machine |
| CN111899551A (en) * | 2020-06-16 | 2020-11-06 | 广州文远知行科技有限公司 | Method, apparatus, computer device and storage medium for determining parking spot |
| CN115909764A (en) * | 2021-09-30 | 2023-04-04 | 上海擎感智能科技有限公司 | Parking lot management method, device and system |
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