CN105702052A - Geomagnetic sensor and Wifi-based parking space detection apparatus and method - Google Patents
Geomagnetic sensor and Wifi-based parking space detection apparatus and method Download PDFInfo
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- CN105702052A CN105702052A CN201610247102.2A CN201610247102A CN105702052A CN 105702052 A CN105702052 A CN 105702052A CN 201610247102 A CN201610247102 A CN 201610247102A CN 105702052 A CN105702052 A CN 105702052A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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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
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Abstract
The invention discloses a geomagnetic sensor and Wifi-based parking space detection apparatus and method, and belongs to the technical field of parking space detection and wireless communication. The parking space detection apparatus comprises a power supply module for providing working voltage to a main controller, a geomagnetic parking space detection module and a wifi wireless communication module, the main controller used for controlling the working states of the geomagnetic parking space detection module and the wifi wireless communication module, the geomagnetic parking space detection module used for acquiring earth magnetic field signals, and the wifi wireless communication module used for sending parking space information. The parking space detection method comprises the steps of the geomagnetic parking space detection module acquiring the earth magnetic field signals of a parking space and sending the signals to the main controller, forming parking space occupation information after the main controller processing the acquired earth magnetic field signals, and the wifi wireless communication module controlled by the main controller sending parking space information based on the principles of sending information when change occurs. The parking space detection apparatus and method have the advantages of wifi wireless transmission, reliable communication, simple networking, high capacity expanding capability, and low execution and use cost.
Description
Technical field
The present invention relates to parking stall measure technical field and field of wireless communication, particularly to a kind of method of stall testing apparatus based on geomagnetic sensor and Wi-Fi and parking stall measure。
Background technology
Along with the sharp increase of automobile quantity, parking stall has become narrow resources, and parking difficulty problem highlights day by day。Parking lot intelligent management arises at the historic moment, and wherein parking stall measure is the most key。Method for detecting parking stalls main on the market has the detection methods such as radio frequency, ultrasound wave, eddy current, video, earth magnetism。Wherein, radio frequency detection method can only detect Parking quantity, it is impossible to accurately detects the seizure condition of certain parking stall；Ultrasonic Detection Method is relatively costly, and easy false detection rate affected by environment is high；Detection method of eddy need to lay detection coil, and construction volume is bigger；Video Detection method need to arrange a large amount of photographic head, relatively costly and versatility is poor；Used geomagnetism detecting method is the detection mode based on magnitude of field intensity, and accuracy of detection is not high。
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi and method for detecting parking stalls。
The purpose of the present invention is achieved through the following technical solutions:
A kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi, including:
Power module, for providing the running voltage of master controller, geomagnetic parking stall detection module and WiFi wireless communication module；
Master controller, for controlling geomagnetic parking stall detection module and the duty of WiFi wireless communication module；
Geomagnetic parking stall detection module, for gathering the earth's magnetic field signal of parking stall；
With WiFi wireless communication module, be used for sending parking space information；
During stall testing apparatus work, geomagnetic parking stall detection module gathers the earth's magnetic field signal of parking stall, and signal is sent into master controller；Master controller forms parking stall occupied information after accepting earth's magnetic field signal that geomagnetic parking stall detection module gathers and processing, and controls Wi-Fi wireless communication module transmission parking space information；Wi-Fi wireless communication module main controller controls to send parking space information by " meeting change to send " mechanism with Wi-Fi wireless communication mode。
Also include LCD MODULE, be used for showing parking space information。
Described geomagnetic parking stall detection module is Anisotropy Magnetoresistance sensor。
Described master controller is STC89C52 microprocessor。
Described master controller and geomagnetic parking stall detection module pass through I2C interface connects, and master controller and Wi-Fi wireless communication module pass through I2C interface connects。
A kind of method for detecting parking stalls based on geomagnetic sensor and Wi-Fi, comprises the following steps:
Power module provides the step of running voltage to master controller, geomagnetic parking stall detection module and WiFi wireless communication module；
Control the main control step of the duty of geomagnetic parking stall detection module and WiFi wireless communication module；
Gather the geomagnetic parking stall detecting step of the earth's magnetic field signal of parking stall；
Send parking space information and WiFi wireless telecommunications step；
Wherein, geomagnetic parking stall detection module gathers the earth's magnetic field signal of parking stall, and signal is sent into master controller；Master controller forms parking stall occupied information after accepting earth's magnetic field signal that geomagnetic parking stall detection module gathers and processing, and controls Wi-Fi wireless communication module transmission parking space information；Wi-Fi wireless communication module main controller controls to send parking space information by " meeting change to send " mechanism with Wi-Fi wireless communication mode。
The formation of described parking stall occupied information comprises the steps:
(1) earth induction intensity threshold in parking stall is measured: measures parking stall earth induction intensity when parking stall earth induction intensity and dead ship condition during without car state respectively, and then determines parking stall earth induction intensity threshold；
Stall testing apparatus Initialize installation: revise the parking stall earth induction intensity threshold that stall testing apparatus is built-in；Main controller controls Wi-Fi module accesses parking stall measure Wi-Fi wireless network, it is determined that unique network ID number；
Stall testing apparatus detects parking stall possession state in real time: main controller controls geomagnetic parking stall detection module gathers parking stall geomagnetic data, application earth induction intensity threshold recognition methods detection parking stall seizure condition。
Specifically comprising the following steps that of a kind of method for detecting parking stalls based on geomagnetic sensor
1) parking stall earth induction intensity time without car state
A) in parking stall without car state time, gather the magnetic field intensity of a certain position, parking stall (such as center position) at the magnetic field strength component h of three coordinate axess X, Y, Z of rectangular coordinate system in spacex、hy、hz；
B) repeatedly perform step a), seek n magnetic field strength component meansigma methodsN is the natural number more than 2
C) withAs parking stall earth induction intensity during without car state。
2) parking stall earth induction intensity when stopping to have car state
A) when parking stall dead ship condition, the magnetic field intensity magnetic field strength component h at three coordinate axess X, Y, Z of rectangular coordinate system in space of a certain position, parking stall (such as center position) is gatheredX stops、hY stops、hZ stops；
B) repeatedly perform step a), seek n magnetic field strength component meansigma methodsN is the natural number more than 2
C) withEarth induction intensity in parking stall during as dead ship condition。
Parking stall earth induction intensity threshold
A) time by parking stall dead ship condition the magnetic field intensity on each direction of principal axis with compare without under car state, try to achieve the variation delta H of magnetic field intensityX、ΔHY、ΔHZ:
B) maximum Δ M: Δ M=max (the Δ H as single shaft magnetic field variable quantity of the maximum in three axle variable quantities is obtainedX, Δ HY, Δ HZ)；
C) using Δ M as parking stall earth induction intensity threshold M。
Parking stall measure
A) cycle gathers the magnetic field strength component h on each direction of principal axis of a certain position, parking stall (such as center position)X0、hY0、hZ0；
B) magnetic field intensity on each for the parking stall of collection direction of principal axis is compared with parking stall earth induction intensity during without car state, try to achieve the variation delta H of magnetic field intensityX1、ΔHY1、ΔHZ1；
C) by maximum for single shaft variation delta M1Compared with predetermined threshold value M, if Δ M1> M, then judge that parking stall stops there is car, if Δ M1< M then judges that parking stall is without car。
A kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi, it is characterised in that it includes master controller, geomagnetic parking stall detection module and WiFi wireless communication module。
Described geomagnetic parking stall detection module is Anisotropy Magnetoresistance sensor HMC5883L, for the anisotropy three digital magnetoresistive transducer of axle。
Described Wi-Fi wireless communication module is ESP8266, for based on USB (universal serial bus) and the flush bonding module meeting network standard, built-in ICP/IP protocol stack, it is possible to realize the conversion between user's serial ports, Ethernet, three interfaces of wireless network (Wi-Fi)。
STC89C52 microprocessor selected by described master controller, is a kind of low-power consumption of STC Corporation's production, high-performance CMOS 8 8-digit microcontroller, has 8K in-system programmable components flash storage。
Master controller passes through I2C bus communication protocol receives the parking stall geomagnetic data of geomagnetic parking stall detection module HMC5883L, use above-mentioned method for detecting parking stalls to form parking stall occupancy after parking stall geomagnetic data is processed, send upper management platform by Wi-Fi wireless communication module to Wi-Fi wireless communication mode；Master controller simultaneously completes Initialize installation and relevant controls such as earth magnetism parking stall measure module HMC5883L, Wi-Fi module。
A kind of method of work based on geomagnetic sensor and the stall testing apparatus of Wi-Fi, it is characterised in that it comprises the following steps:
Parking stall earth induction intensity threshold is measured: stall testing apparatus is installed in each immediate vicinity position, parking stall, parking lot, stall testing apparatus debugging routine is started: measure parking stall earth induction intensity when parking stall earth induction intensity, dead ship condition during without car state, and then determine parking stall earth induction intensity threshold after installing。
Stall testing apparatus Initialize installation: revise the parking stall earth induction intensity threshold that stall testing apparatus is built-in；Main controller controls Wi-Fi module accesses parking stall measure Wi-Fi wireless network, it is determined that unique network ID number。
Stall testing apparatus detects parking stall possession state in real time: main controller controls geomagnetic parking stall detection module gathers parking stall geomagnetic data, application earth induction intensity threshold recognition methods detection parking stall seizure condition。
Stall testing apparatus sends parking stall possession state: stall testing apparatus detects when parking stall possession state changes, and main controller controls Wi-Fi module sends parking stall possession state information to upper management platform, namely sends parking space information with " meeting change to send " mechanism。
Upper management platform receives each parking stall seizure condition data, and through network real-time release parking position information of park after aggregation process, user may utilize the mobile terminal wireless access such as mobile phone, PDA and knows parking position information of park in real time。
The invention provides a kind of method for detecting parking stalls using earth induction intensity threshold identification technology based on geomagnetic sensor, the method can overcome the defect of existing parking detection method, has that cost is low, easy for installation, measure the advantages such as accurate。
Wi-Fi technology relies on its cost low, it is not necessary to wiring, and the huge advantage such as networking is simple, high data rate have become the one preferred technique of wireless local area network building；And can with the mobile terminal wireless connections such as mobile phone, PDA。The present invention adopts Wi-Fi wireless telecommunications to send parking space information, utilize its dynamic group net, the mobile terminal such as mobile phone, PDA can the network characteristics such as access whenever and wherever possible, realize detection parking position occupancy in real time, a new method is provided for parking lot network management, detection data are wirelessly transmitted to upper management platform, and then through upper management platform through Web Publishing, user may utilize the mobile terminal wireless access such as mobile phone, PDA and knows parking position information of park in real time。
Compared with prior art, beneficial effects of the present invention and advantage are:
(1) have based on the stall testing apparatus of geomagnetic sensor and Wi-Fi that cost is low, easy for installation, measure the advantages such as accurate；
(2) the stall testing apparatus Wi-Fi technology of the present invention relies on its cost low, it is not necessary to wiring, and the huge advantage such as networking is simple, high data rate have become the one preferred technique of wireless local area network building；And can with the mobile terminal wireless connections such as mobile phone, PDA。
(3) method for detecting parking stalls of the present invention is with magnetic field intensity threshold value for detection mode, and accuracy of detection is high。
(4) in the method for detecting parking stalls of the present invention, parking space information is to be wirelessly transferred with Wi-Fi, and communication is reliable, and networking is simple, and dilatation ability is strong；Implement, use cost cheap。
Accompanying drawing explanation
Fig. 1 is the schematic diagram based on geomagnetic sensor and the stall testing apparatus of Wi-Fi；
Fig. 2 is the schematic diagram based on geomagnetic sensor and the stall testing apparatus containing LCD MODULE of Wi-Fi；
Fig. 3 is the PCB circuit diagram based on geomagnetic sensor and the stall testing apparatus of Wi-Fi；
Fig. 4 is the circuit theory diagrams of MCU and extension；
Fig. 5 is the circuit theory diagrams of functional module；
Fig. 6 is the circuit theory diagrams of power module；
Fig. 7 is the circuit theory diagrams of minimum system。
Detailed description of the invention
Being clearly understood to make present disclosure be easier to, below according to specific embodiment and in conjunction with accompanying drawing, the present invention is further detailed explanation。
Embodiment: a kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi (see Fig. 1-2), it includes power module, master controller, geomagnetic parking stall detection module and Wi-Fi wireless communication module。Wherein, described geomagnetic parking stall detection module gathers the earth's magnetic field signal of parking stall, and signal is sent into master controller；Wi-Fi wireless communication module main controller controls to send parking space information by " meeting change to send " mechanism with Wi-Fi wireless communication mode；Master controller forms parking stall occupied information after accepting earth's magnetic field signal that geomagnetic parking stall detection module gathers and processing, and controls Wi-Fi wireless communication module transmission parking space information。
Described stall testing apparatus also includes LCD MODULE, is used for showing parking space information。
Described LCD MODULE is industry character mode lcd, it is possible to show 16x02 that is 32 character simultaneously。
Described geomagnetic parking stall detection module is that core builds based on Anisotropy Magnetoresistance sensor HMC5883L, and detection frequency is 1Hz。
The parking stall possession state data of master controller, with ESP8266 for core, are converted to the data type of Wi-Fi standard, and are wirelessly transmitted to upper management platform with Wi-Fi wireless communication mode by described Wi-Fi wireless communication module。
STC89C52 microprocessor selected by described master controller, Initialize installation and control geomagnetic parking stall detection module and Wi-Fi wireless communication module, receive the parking stall measure data of also aggregation process geomagnetic parking stall detection module HMC5883L, form and send parking stall occupied information。
Master controller and geomagnetic parking stall detection module I2C interface connects, and master controller is connected by serial interface with Wi-Fi wireless communication module。
Based on geomagnetic sensor and the stall testing apparatus of Wi-Fi PCB circuit diagram as shown in Figure 3。
The circuit theory diagrams of MCU and extension, functional module (i.e. LCD MODULE, geomagnetic parking stall detection module and Wi-Fi wireless communication module), power module and minimum system are as shown in figs. 4-7。Wherein functional module includes LCD MODULE (as shown in Figure 5 a), geomagnetic parking stall detection module (as shown in Figure 5 b) and Wi-Fi wireless communication module as shown in Figure 5 c。
Stall testing apparatus is installed on each immediate vicinity position, parking stall, parking lot, and stall testing apparatus workflow is:
Start stall testing apparatus debugging routine, set the detection frequency of geomagnetism detecting chip as 1Hz, parking stall earth induction intensity when parking stall earth induction intensity, dead ship condition when sequentially determining is without car state, and then determine parking stall earth induction intensity threshold。
Revise the parking stall earth induction intensity threshold that stall testing apparatus is built-in, initialize Wi-Fi wireless communication module, control Wi-Fi module and access parking stall measure Wi-Fi wireless network。
Main controller controls geomagnetic parking stall detection module in stall testing apparatus gathers parking stall geomagnetic data, application earth induction intensity threshold recognition methods detection parking stall seizure condition。
Stall testing apparatus detects when parking stall possession state changes, and main controller controls Wi-Fi module sends parking stall possession state information to upper management platform, namely sends parking space information with " meeting change to send " mechanism。
Upper management platform receives each parking stall seizure condition data, and through network real-time release parking position information of park after aggregation process, user may utilize the mobile terminal wireless access such as mobile phone, PDA and knows parking position information of park in real time。
Claims (7)
1. the stall testing apparatus based on geomagnetic sensor and Wi-Fi, it is characterised in that including:
Power module, for providing the running voltage of master controller, geomagnetic parking stall detection module and WiFi wireless communication module；
Master controller, for controlling geomagnetic parking stall detection module and the duty of WiFi wireless communication module；
Geomagnetic parking stall detection module, for gathering the earth's magnetic field signal of parking stall；
With WiFi wireless communication module, be used for sending parking space information；
During stall testing apparatus work, geomagnetic parking stall detection module gathers the earth's magnetic field signal of parking stall, and signal is sent into master controller；Master controller controls Wi-Fi wireless communication module and sends parking space information after the earth's magnetic field signal of earth magnetism parking stall measure module collection carries out process formation parking stall occupied information；Wi-Fi wireless communication module main controller controls to send parking space information by " meeting change to send " mechanism with Wi-Fi wireless communication mode。
2. a kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi according to claim 1, it is characterised in that: also include LCD MODULE, be used for showing parking space information。
3. a kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi according to claim 1 or claim 2, it is characterised in that: described geomagnetic parking stall detection module is Anisotropy Magnetoresistance sensor。
4. a kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi according to claim 1 or claim 2, it is characterised in that: described master controller is STC89C52 microprocessor。
5. a kind of stall testing apparatus based on geomagnetic sensor and Wi-Fi according to claim 1 or claim 2, it is characterised in that: described master controller and geomagnetic parking stall detection module pass through I2C interface connects, and master controller and Wi-Fi wireless communication module pass through I2C interface connects。
6. the method for detecting parking stalls based on geomagnetic sensor and Wi-Fi, it is characterised in that comprise the following steps:
Power module provides the step of running voltage to master controller, geomagnetic parking stall detection module and WiFi wireless communication module；
Control the main control step of the duty of geomagnetic parking stall detection module and WiFi wireless communication module；
Gather the geomagnetic parking stall detecting step of the earth's magnetic field signal of parking stall；
Send parking space information and WiFi wireless telecommunications step；
Wherein, geomagnetic parking stall detection module gathers the earth's magnetic field signal of parking stall, and signal is sent into master controller；The earth's magnetic field signal of earth magnetism parking stall measure module collection is carried out process and forms parking stall occupied information by master controller, controls Wi-Fi wireless communication module and sends parking space information；Wi-Fi wireless communication module main controller controls to send parking space information by " meeting change to send " mechanism with Wi-Fi wireless communication mode。
7. a kind of method for detecting parking stalls based on geomagnetic sensor and Wi-Fi according to claim 6, it is characterised in that: the formation of described parking stall occupied information comprises the steps:
(1) earth induction intensity threshold in parking stall is measured: measures parking stall earth induction intensity when parking stall earth induction intensity and dead ship condition during without car state respectively, and then determines parking stall earth induction intensity threshold；
Stall testing apparatus Initialize installation: revise the parking stall earth induction intensity threshold that stall testing apparatus is built-in；Main controller controls Wi-Fi module accesses parking stall measure Wi-Fi wireless network, it is determined that unique network ID number；
Stall testing apparatus detects parking stall possession state in real time: main controller controls geomagnetic parking stall detection module gathers parking stall absolute force, application earth induction intensity threshold recognition methods detection parking stall seizure condition。
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| CN107132801A (en) * | 2017-06-30 | 2017-09-05 | 南京信息工程大学 | A kind of remote switch device based on Arduino |
| CN107730976A (en) * | 2017-09-19 | 2018-02-23 | 深圳云停智能交通技术研究院有限公司 | A kind of earth magnetism wagon detector jamproof system and method |
| CN109102716A (en) * | 2018-08-28 | 2018-12-28 | 南京理工大学 | A kind of parking stall measure system and method based on LoRa wireless communication technique |
| CN109308814A (en) * | 2017-07-28 | 2019-02-05 | 南宁富桂精密工业有限公司 | Method for detecting parking stalls, parking sensor and computer readable storage medium |
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Application publication date: 20160622 |