CN109147384A - A kind of parking site detecting system and method - Google Patents
A kind of parking site detecting system and method Download PDFInfo
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- CN109147384A CN109147384A CN201811142029.8A CN201811142029A CN109147384A CN 109147384 A CN109147384 A CN 109147384A CN 201811142029 A CN201811142029 A CN 201811142029A CN 109147384 A CN109147384 A CN 109147384A
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- parking 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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Abstract
This application provides a kind of parking site detecting system and methods, the communication unit that can be extended by pin realizes that the perception to multiple parking stalls detects, and server is sent by transmission unit by the parking space information that perception obtains, server receives the obtaining parking space information request that user equipment is sent, parking space information is returned into user equipment again, the power supply and communication line complicated without installation, detection of the single communication unit to multiple parking stalls can be achieved, system hardware cost is reduced, the usage experience of user is improved.
Description
Technical field
This application involves field of traffic control more particularly to a kind of parking site detecting system and methods.
Background technique
With the quickening of Process of Urbanization Construction paces, realize that efficient utilize in Large Underground parking lot is to solve the problems, such as parking difficulty
An important measure.But the environment in Large Underground parking lot is complicated at present, driver is difficult to conveniently and efficiently find parking
Position, although domestic Large Underground parking lot, which is substantially all, is equipped with parking base management system, and the management of most of garage parkings is all
Lay particular emphasis on charging function, more monitoring management work such as wagon flow guidance and parking stall management or the artificial pipe for relying on Field Force
Reason.
It currently, is image recognition technology and infrared sensing skill based on machine vision to the main stream approach of parking stall detection
Art, these technologies need to install complicated power supply and communication line, complicated technology realization and lead so that cost of implementation is excessively high
Cause the cost of garage management also higher, therefore the technical solution of mainstream is difficult to large-scale promotion application.
Therefore, it to make driver find parking stall in Large Underground parking lot more conveniently, fully mentions
The utilization rate on high parking stall, while the cost of implementation of parking site detecting system is reduced, it is a problem to be solved.
Apply for content
The purpose of the application is to provide a kind of parking site detecting system and method, stops under the prior art to solve
Position administrative skill is complicated and driver is difficult to the problem of quickly and easily finding parking stall.
To achieve the above object, this application provides a kind of parking site detecting systems, wherein the system includes:
Information collecting device, including sension unit, communication unit and gateway unit, the sension unit is for acquiring in real time
Parking space information, the communication unit is extended by pin realizes the parking space information for obtaining multiple sension units, and is used for
Gateway unit is wirelessly sent by the real-time parking space information, the gateway unit is used for the real-time parking
Position information is sent to transmitting device；
Transmitting device, the parking space information for obtaining information collecting device are transmitted to server；
Server, for receive transmitting device transmission parking space information, and based on the received user equipment send stop
Parking space information acquisition request returns to parking space information to user equipment.
Further, real-time parking space information is sent to next-hop according to preset multihop routing and led to by the communication unit
Believe that unit, the next-hop communication unit are forwarded again according to preset multihop routing, until the parking space information reaches
Gateway unit.
Further, the transmitting device is based on the realization of narrowband Internet of Things and sends server for real-time parking space information.
Further, the parking space information that small routine of the server on user equipment based on the received is sent obtains
Request is taken to return to parking space information to small routine.
Another aspect based on the application, present invention also provides one kind to be stopped based on above-mentioned parking site detecting system
The method of position detection, wherein this method comprises:
Information collecting device obtains the parking space information in parking lot in real time, wherein communication unit in information collecting device
It is extended by pin and realizes the parking space information for obtaining multiple sension units in information collecting device, and for stopping described in real time
Parking space information is wirelessly sent to gateway unit；
The parking space information is sent to server by transmitting device by information collecting device；
The server obtaining parking space information request that user equipment is sent based on the received, returns to parking stall to user equipment
Information.
Further, information collecting device obtains the parking space information in parking lot in real time, comprising:
Sension unit in information collecting device acquires real-time parking space information；
Communication unit in information collecting device sends the parking space information to the gateway list in information collecting device
Member；
The real-time parking space information is sent transmitting device by the gateway unit.
Further, the communication unit in information collecting device sends the parking space information in information collecting device
Gateway unit, comprising:
The parking space information is sent to next by the communication unit in information collecting device according to preset multihop routing
Jump communication unit；
The next-hop communication unit is forwarded again according to preset multihop routing, until the parking space information reaches
Gateway unit in information collecting device.
Further, the parking space information is sent to server by transmitting device by information collecting device, comprising:
The parking space information is sent transmitting device by information collecting device, and the transmitting device is based on narrowband Internet of Things
Server is sent by real-time parking space information.
Further, the server obtaining parking space information request that user equipment is sent based on the received, to user equipment
Return to parking space information, comprising:
The server obtaining parking space information request that the small routine on user equipment is sent based on the received, is returned to small routine
Return parking space information.
Compared with prior art, the communication unit realization that scheme provided by the present application can be extended by pin stops to multiple
The perception of parking stall detects, and sends server by transmission unit for the parking space information that perception obtains, and server, which receives, to be used
The obtaining parking space information request that family equipment is sent, then parking space information is returned into user equipment, it is complicated without installation
Power supply and communication line, it can be achieved that single detection of the communication unit to multiple parking stalls, reduces system hardware cost, improves
The usage experience of user.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of structural schematic diagram of parking site detecting system provided by the embodiments of the present application.
Fig. 2 is ultrasonic distance measurement schematic illustration provided by the embodiments of the present application.
Fig. 3 is ultrasonic wave timing diagram provided by the embodiments of the present application.
Fig. 4 is a kind of flow chart of parking space detection method provided by the embodiments of the present application.
Appended drawing reference: 1, information collecting device, 2, transmitting device, 3, server, 11, sension unit, 12, communication unit,
13, gateway unit.
Specific embodiment
The application is described in further detail with reference to the accompanying drawing.
In a typical configuration of this application, terminal, the equipment of service network and trusted party include one or more
Processor (CPU), input/output interface, network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or
Any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, computer
Readable medium does not include non-temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
Fig. 1 shows a kind of parking site detecting system provided by the embodiments of the present application, wherein the system includes information collection
Device, transmitting device and server, information collecting device include sension unit, communication unit and gateway unit, and sension unit is used
In acquiring real-time parking space information, communication unit is extended by pin realizes the parking space information for obtaining multiple sension units,
And for wirelessly sending gateway unit for the real-time parking space information, gateway unit for stopping in real time by described
Parking space information is sent to transmitting device；Transmitting device is used to the parking space information that information collecting device obtains being transmitted to service
Device；Server is used to receive the parking space information of transmitting device transmission, and the parking stall letter that user equipment is sent based on the received
It ceases acquisition request and returns to parking space information to user equipment.
Here, sension unit preferably includes ultrasonic sensor and corresponding signal processing circuit is constituted.It is mainly responsible for and stops
The acquisition of parking space information.Ultrasonic sensor is the sensor that ultrasonic signal is converted into electric signal, also referred to as detector.Pass through
Ultrasonic sensor obtains parking space information, and parking space information may include on much information, such as sension unit detection parking stall
Whether there is relevant information existing for vehicle, to differentiate parking stall state, as being 1 if vehicle is parked on this parking stall, does not have
Having vehicle is then 0.
In the embodiment of the present application, ultrasonic distance measurement principle is as shown in Fig. 2, ultrasonic distance measurement is by means of ultrasonic pulse-echo
Transit time method is realized.If ultrasonic pulse is issued to by sensor receives the time experienced as t, ultrasonic wave is in air
In spread speed be c, then the distance D from sensor to target object can be found out by following formula:Basic principle are as follows: warp
Transmitter, which is launched, is about 6mm, and frequency is the ultrasonic signal of 40KHZ, this signal is reflected by the object to be received by reception head back,
The energy converter that head is substantially a kind of piezoelectric effect is received, it receives the weak voltage signals of mV grades of generation after signal.Again by
Single-chip microcontroller generates the square wave of 40KHz, directly drives frequency and adjusts chip, preferably CD4049 chip, subsequent CD4049 chip
Then 40KHz frequency signal is adjusted, ultrasonic sensor is made to generate resonance.
Preferably, HC-SR04 ultrasonic distance measuring module is used in the embodiment of the present application.The module can provide 2cm-400cm
Contactless distance sensing function, range accuracy arrives 3mm up to high；Module includes ultrasonic transmitter, receiver and control
Circuit.Its basic functional principle is as follows:
(1) ranging is triggered using I/O port TRIG, the high level letter to minimum 10us is in；
(2) module sends the square wave of 8 40khz automatically, has detected whether signal return automatically；
(3) if there is signal returns, a high level is exported by I/O port ECHO, high level duration is exactly ultrasound
Wave is from the time for being emitted to return.Measuring distance=(the high level time * velocity of sound (340M/S))/2.
In the embodiment of the present application, the timing of ultrasonic wave is as shown in figure 3, only need to provide a 10uS known to the timing diagram
The above pulse triggering signal, the inside modules will issue 8 40kHz period level and detect echo, if detecting that echo is believed
Number response signal is then exported, the pulse width of response signal is directly proportional at a distance from being surveyed here, from there through transmitting signals to
Distance can be calculated in the response signal time interval received.Corresponding formula are as follows: uS/58=centimetres or uS/148=English
It is very little；Or are as follows: the distance=high level time * velocity of sound (340M/S)/2.In embodiments herein, preferably set measurement period to
60ms or more, to prevent influence of the transmitting signal to response signal.
Here, communication unit is preferably CC2430 chip, CC2430 chip mainly includes three modules: CPU module, radio frequency
Transceiver module and power supply, clock module.CPU module is the core of CC2430 chip, all equipment control, task schedule, energy
Amount calculating, orthofunction, communication protocol and data fusion are all completed under the support of this module, and CPU module contains 8KB's
The programmable Flash of static RAM and 32/64/128KB, 2 16 bit timing devices, 28 bit timing devices, and support 3 kinds of suspend mode
Mode.
In general, communication unit can only obtain the data of ultrasonic sensor acquisition, it is more to solve communication unit acquisition
A ultrasonic sensor obtains the problem of data, in embodiments herein, by the pin to communication unit be extended come
It realizes.In general, ultrasonic sensor possesses tetra- pins of VCC, Trig, Echo, Gnd, preferably CC2430 chip is extended
When, it is necessary to the idle pin of the chip is extended, since certain pins of node have been occupied by specific function, institute
5 ultrasonic sensors can only be at most extended with single CC2430 chip.By by multiple ultrasonic sensors and CC2430 core
Piece be connected, it can be achieved that multiple Ultrasonic Sensor Datas acquisition, system hardware cost can be reduced.
It further include gateway unit in information collecting device, for sending transmitting device for real-time parking space information.Due to
The range in parking lot is very big, there is a large amount of pipeline and column, has larger impact to wireless signal transmission, along with communication unit by
It is limited in by various factors such as own vol, price, resources, communication range is smaller, to avoid parking space information from being transmitted across
In some embodiments of the present application, the transmitting of sensing data is realized by wireless sensor network for loss in journey, is used
Wireless sensor network can be without installing complicated power supply and communication line.Wherein, by wireless between sensor and sensor
Mode is communicated, and the communication between communication unit and communication unit is then to constitute by way of self-organizing network come real
Existing, the function that the node of sension unit and communication unit composition can be realized mainly includes sensing, processing signal and realizes wireless
Communication etc., node is both the promoter of packet, while being also that packet turns originator, passes through self-organization of network and multi-hop road
By parking space information is sent to gateway unit.
Specifically, real-time parking space information is sent to next-hop communication unit according to preset multihop routing by communication unit
Member, the next-hop communication unit are forwarded again according to preset multihop routing, until the parking space information reaches gateway
Unit.Here, next-hop communication unit be the communication unit adjacent with the communication unit, to access those apart from it is farther away other
Communication unit will be just able to achieve by preset multihop routing.
In embodiments herein, multihop routing refers to that the communication unit in wireless sensor network can only be adjacent with its
Communication unit is communicated, if it is desired to be accessed that a part of communication unit other than oneself communication range, then be had to pass through
The forwarding of a large amount of intermediate communication unit is completed, so that stablizing entire wireless sensor network security, includes data
Message package do not lose.
After real-time parking space information is sent transmitting device by gateway unit, transmitting device is based on the realization of narrowband Internet of Things will
Real-time parking space information is sent to server.In embodiments herein, preferred gateways unit passes through RS232 serial ports for parking stall
Information is sent to transmitting device.Transmitting device is the device for data transmission, it may include realize the hardware device of data transmission,
It may also comprise the software module for realizing data transmission.
In embodiments herein, realize that cloud transparent transmission function, the function can be by narrowband Internet of Things (i.e. NB-IoT)
Transparent transmission relationship is established between DTU (data transmission unit) and computer virtual serial ports, virtual serial port can be created, so that computer
Corresponding with the DTU serial ports intercommunication of virtual serial port the advantages of transmitting data, being also equipped with wide covering, low-power consumption, lower module cost
The ability connected with support magnanimity, can obtain parking space information.
Here, cloud transparent transmission function refers to that transmission network regardless of transmitting what data, only needs data transmission to be transmitted to arrive
Destination node, while guaranteeing the quality of the data of transmission, in the transmission process of data, this group of data do not occur any type of
Change, i.e., unrelated with the medium of transmission network, modulation demodulation system, transmission mode, transport protocol, seemingly transmission process is transparent
As, original sample is transferred to receiving end.
In embodiments herein, transmitting device creation RS232 serial ports can carry out data transmission with server, transmission dress
Set the data that can carry out receiving server end by virtual serial port.
Server is used to receive the parking space information of transmitting device transmission, and the parking that user equipment is sent based on the received
Position information acquisition request returns to parking space information to user equipment.Specifically, server is small on user equipment based on the received
The obtaining parking space information that program is sent requests to return to parking space information to small routine, and user equipment is preferably mobile device here
Such as mobile phone, IPAD etc., using exhibition methods such as small routine ratio APP, webpages more close to the use habit of mobile device user.
Here, small routine is preferably wechat small routine, the server-side of the wechat small routine is mainly taken with Java language
It builds, is stored in the service routine of server, small routine can obtain parking space information with real time access server.
In the embodiment of the present application, server is preferably Ali's Cloud Server, Ali's Cloud Server (Elastic Compute
Service, ECS) be a kind of processing capacity can elastic telescopic calculating service, way to manage is simpler higher than physical server
Effect.Ali's Cloud Server can be more stable with rapid build, safe application, reduce exploitation O&M difficulty and entirety IT cost,
Core business innovation can be focused more on.
In the embodiment of the present application, the realization of small routine uses C/S framework, for small routine client exploitation it is preferable to use
Wechat web developer tool and PHP code carry out the exploitation of small routine, and it is soft that development process does not need other more complex exploitations
Part.
Small routine server end is mainly developed and disposed with Java Integrated Development Environment, which mainly includes
MySQL, Ali's Cloud Server and SSHE frame etc..For the information exchange between client and server end, JSON is used
Data format data are transmitted.
In the embodiment of the present application, the exploitation of small routine uses MVC development idea, including logical layer, view layer and basis
Layer.Each small routine includes three files, is app.js, app.json, app.wxss file respectively, they are small routine respectively
The realization of logic, the public setting of small routine, the public style sheet of small routine.
Each interface in applet view layer is made of four files, and the title at interface is oneself definition, for boundary
It mainly include JS file, WXML file, WXSS file and JSON file for the file of face, this four files also respectively correspond
Page logic, page structure, style sheet and page configuration.
In the embodiment of the present application, the logical layer of small routine is mainly by written in JavaScript, which is mainly used for and view
Layer interacts, and sends view layer for the data of processing, view layer feeds back the data of processing.Involved in logical layer
Function mainly includes APP function, this function is used to accreditation process；For get APP function for obtaining small routine example, wechat is small
It is many convenient that base library in program can provide programming person, can call wherein control realization full in compiling procedure
Foot requires.
In the embodiment of the present application, wechat small routine is mainly made of interface front end and back-end data interaction, wechat small routine
It mainly include interface file, interface front end shows the information of garage monitoring, including JS, WXML, WXSS, JSON file, wherein JS
File is used to obtain data from cloud server.
Based on the same inventive concept, the application other embodiment additionally provides a kind of method of parking stall detection, such as Fig. 4
Shown, since this method is based on aforementioned parking site detecting system, and the method realized is aforementioned parking site detecting system embodiment
In corresponding method, it is and similar to the principle that the system solves the problems, such as, therefore the implementation of the method may refer to correspond to
The implementation of system, overlaps will not be repeated.
In the application other embodiment, the method for parking stall detection includes:
Step S101, information collecting device obtain the parking space information in parking lot in real time, wherein in information collecting device
Communication unit is extended by pin realizes the parking space information for obtaining multiple sension units in information collecting device, and is used for institute
It states real-time parking space information and is wirelessly sent to gateway unit；
The parking space information is sent to server by transmitting device by step S102, information collecting device；
Step S103, the server obtaining parking space information request that user equipment is sent based on the received, to user equipment
Return to parking space information.
In step s101, information collecting device obtains the parking space information in parking lot in real time, specifically, including it is as follows
Step:
1) sension unit in information collecting device acquires real-time parking space information；
2) communication unit in information collecting device sends parking space information to the gateway unit in information collecting device；
3) real-time parking space information is sent transmitting device by gateway unit.
In the embodiment of the present application, the parking space information is sent information collection by the communication unit in information collecting device
Gateway unit in device, specifically may include following steps: the communication unit in information collecting device is according to preset multi-hop road
By parking space information is sent to next-hop communication unit；Next-hop communication unit is turned again according to preset multihop routing
Hair, until parking space information reaches the gateway unit in information collecting device.
In step s 102, the parking space information is sent to server by transmitting device by information collecting device, tool
Body includes the following steps: that parking space information is sent transmitting device by information collecting device, and transmitting device is based on narrowband Internet of Things
Server is sent by real-time parking space information.
In step s 103, the server obtaining parking space information request that user equipment is sent based on the received, to user
Equipment returns to parking space information, specifically comprises the following steps: what small routine of the server based on the received on user equipment was sent
Obtaining parking space information request returns to parking space information to small routine.
In conclusion the communication unit that scheme provided by the present application can be extended by pin is realized to multiple parking stalls
Perception detection, and server is sent by transmission unit by the parking space information that perception obtains, server receives user equipment
The obtaining parking space information of transmission is requested, then parking space information is returned to user equipment, the power supply complicated without installation
With communication line, it can be achieved that single detection of the communication unit to multiple parking stalls, reduces system hardware cost, improve user's
Usage experience.
It should be noted that the application can be carried out in the assembly of software and/or software and hardware, for example, can adopt
With specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment
In, the software program of the application can be executed to implement the above steps or functions by processor.Similarly, the application
Software program (including relevant data structure) can be stored in computer readable recording medium, for example, RAM memory,
Magnetic or optical driver or floppy disc and similar devices.In addition, hardware can be used to realize in some steps or function of the application, example
Such as, as the circuit cooperated with processor thereby executing each step or function.
In addition, a part of the application can be applied to computer program product, such as computer program instructions, when its quilt
When computer executes, by the operation of the computer, it can call or provide according to the present processes and/or technical solution.
And the program instruction of the present processes is called, it is possibly stored in fixed or moveable recording medium, and/or pass through
Broadcast or the data flow in other signal-bearing mediums and transmitted, and/or be stored according to described program instruction operation
In the working storage of computer equipment.Here, including an equipment according to one embodiment of the application, which includes using
Memory in storage computer program instructions and processor for executing program instructions, wherein when the computer program refers to
When enabling by processor execution, method and/or skill of the equipment operation based on aforementioned multiple embodiments according to the application are triggered
Art scheme.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case where without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in device claim is multiple
Unit or device can also be implemented through software or hardware by a unit or device.
Claims (9)
1. a kind of parking site detecting system, wherein the system includes:
Information collecting device, including sension unit, communication unit and gateway unit, the sension unit are stopped in real time for acquiring
Parking space information, the communication unit is extended by pin realizes the parking space information for obtaining multiple sension units, and is used for institute
It states real-time parking space information and is wirelessly sent to gateway unit, the gateway unit is used to believe on the real-time parking stall
Breath is sent to transmitting device；
Transmitting device, the parking space information for obtaining information collecting device are transmitted to server；
Server, for receiving the parking space information of transmitting device transmission, and the parking stall that user equipment is sent based on the received
Information acquisition request returns to parking space information to user equipment.
2. system according to claim 1, wherein the communication unit is according to preset multihop routing by real-time parking stall
Information is sent to next-hop communication unit, and the next-hop communication unit is forwarded again according to preset multihop routing, until
The parking space information reaches gateway unit.
3. system according to claim 1, wherein the transmitting device is based on narrowband Internet of Things and realizes real-time parking stall
Information is sent to server.
4. system according to claim 1, wherein small routine of the server on user equipment based on the received
The obtaining parking space information of transmission requests to return to parking space information to small routine.
5. a kind of method that the system using claim 1 carries out parking stall detection, wherein this method comprises:
Information collecting device obtains the parking space information in parking lot in real time, wherein communication unit passes through in information collecting device
The parking space information for obtaining multiple sension units in information collecting device is realized in pin extension, and is used for the real-time parking stall
Information is wirelessly sent to gateway unit；
The parking space information is sent to server by transmitting device by information collecting device；
The server obtaining parking space information request that user equipment is sent based on the received, returns to parking stall to user equipment and believes
Breath.
6. according to the method described in claim 5, wherein, information collecting device obtains the parking space information in parking lot in real time,
Include:
Sension unit in information collecting device acquires real-time parking space information；
Communication unit in information collecting device sends the parking space information to the gateway unit in information collecting device；
The real-time parking space information is sent transmitting device by the gateway unit.
7. according to the method described in claim 6, wherein, the communication unit in information collecting device sends out the parking space information
The gateway unit being sent in information collecting device, comprising:
The parking space information is sent to next-hop according to preset multihop routing and led to by the communication unit in information collecting device
Believe unit；
The next-hop communication unit is forwarded again according to preset multihop routing, until the parking space information reaches information
Gateway unit in acquisition device.
8. according to the method described in claim 5, wherein, information collecting device sends out the parking space information by transmitting device
It send to server, comprising:
The parking space information is sent transmitting device by information collecting device, and the transmitting device is based on narrowband Internet of Things will be real
When parking space information be sent to server.
9. according to the method described in claim 5, wherein, the server parking space information that user equipment is sent based on the received obtains
Request is taken, returns to parking space information to user equipment, comprising:
The server obtaining parking space information request that the small routine on user equipment is sent based on the received, stops to small routine return
Parking space information.
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| CN201811142029.8A CN109147384A (en) | 2018-09-28 | 2018-09-28 | A kind of parking site detecting system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111225455A (en) * | 2019-12-04 | 2020-06-02 | 广州市星翼电子科技有限公司 | Wireless terminal equipment based on 4G network and wireless data transmission method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111225455A (en) * | 2019-12-04 | 2020-06-02 | 广州市星翼电子科技有限公司 | Wireless terminal equipment based on 4G network and wireless data transmission method |
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