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CN114155739A - A wireless sensor for sensing vehicle license plates and a parking management method using the same - Google Patents

A wireless sensor for sensing vehicle license plates and a parking management method using the same Download PDF

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Publication number
CN114155739A
CN114155739A CN202111451481.4A CN202111451481A CN114155739A CN 114155739 A CN114155739 A CN 114155739A CN 202111451481 A CN202111451481 A CN 202111451481A CN 114155739 A CN114155739 A CN 114155739A
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China
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unit
signal
circuit
vehicle
wireless sensor
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CN202111451481.4A
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Chinese (zh)
Inventor
白莉
王寅钢
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Henan Jiangshang Intelligent Construction Co ltd
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Henan Jiangshang Intelligent Construction Co ltd
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/14Traffic control systems for road vehicles indicating individual free spaces in parking areas
    • G08G1/149Traffic 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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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)

Abstract

The invention relates to an intelligent parking technology, in particular to a wireless sensor for automatically sensing a vehicle license plate by using a Bluetooth technology and a parking management method using the same, wherein the wireless sensor comprises a bottom box and a cover plate, a copper antenna is arranged in the cover plate, a circuit board is arranged in the bottom box, and a power supply unit, a signal isolation circuit, a bus interface, a CPU processing unit, a storage unit, a timing unit, a signal decoding circuit, an analog-to-digital conversion circuit, a filtering amplification circuit, a signal conversion unit, a Bluetooth module and a receiving and transmitting antenna are arranged on the circuit board; the wireless sensor is installed on the ground of the parking space, a vehicle enters the parking space, the wireless sensor automatically recognizes chip information on a license plate of the vehicle through Bluetooth, the sensed vehicle information is transmitted to the CPU processing unit to be processed, processed data are transmitted to the area management machine, the area management machine records parking time and leaving time of the vehicle, automatic charging is carried out, fees are deducted from a bank card bound to the vehicle, and meanwhile, fee information is transmitted to a vehicle owner.

Description

Wireless sensor for sensing license plate of vehicle and parking management method applying same
Technical Field
The invention relates to the technical field of intelligent parking, in particular to a wireless sensor for accurately judging license plate information of a parking vehicle at a parking space, reducing vehicle parking management cost and improving induction vehicle license plate and a parking management method using the wireless sensor.
Background
There are two ways of vehicle license plate recognition in the current market: one is identified by a camera, and the method has high cost, high maintenance and management difficulty, high cost and limited installation position, is not suitable for parking identification management of large-area parking places, and is generally only used for installing one parking place at an entrance;
the other recognition mode is that a license plate of a handheld instrument is adopted to be recognized through infrared communication code scanning, the cost of the instrument is high, the installation position is limited, and a recognition signal is easily shielded or cannot be recognized due to poor angle.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a wireless sensor for sensing a license plate of a vehicle and a parking management method using the wireless sensor, wherein the wireless sensor can accurately judge the information of the license plate of the vehicle parked in a parking space and reduce the vehicle parking management cost.
The technical scheme of the invention is realized as follows:
a wireless sensor for sensing a vehicle license plate comprises a bottom box and a cover plate, wherein the bottom box and the cover plate are bonded together, a copper antenna is arranged in the cover plate, a circuit board is arranged in the bottom box, a wire outlet is arranged on the bottom box, a lead on the circuit board penetrates out of the wire outlet to be connected with an external power supply and a bus, the antenna on the cover plate is directly inserted on the circuit board through a wire, a unit circuit is arranged on the circuit board, and the unit circuit comprises a power supply unit, a signal isolation circuit, a bus interface, a CPU (central processing unit) processing unit, a storage unit, a timing unit, a signal decoding circuit, an analog-to-digital conversion circuit, a filtering amplification circuit, a signal conversion unit, a Bluetooth module and a transceiving antenna; the power supply unit is connected with the signal isolation circuit and the CPU processing unit, the signal isolation circuit is connected with the bus interface and the CPU processing unit, the CPU processing unit is connected with the storage unit, the timing unit and the signal decoding circuit, the signal decoding unit is connected with the analog-to-digital conversion circuit, the analog-to-digital conversion circuit is connected with the filtering amplification circuit, the filtering amplification circuit is connected with the signal conversion unit, the signal conversion unit is connected with the Bluetooth module, and the Bluetooth module is connected with the transmitting-receiving antenna.
The power supply unit converts the direct current 24V close to the far end into different voltages to supply working power supplies required by different circuits and chips; the bus interface is an RS485 interface, follows an MODBUS protocol, and is a communication channel for receiving instruction data of a remote management host and sending local processing data; the signal isolation circuit carries out isolation coupling processing on a far-end signal sent by the butt joint unit channel, amplifies the far-end signal and sends the amplified far-end signal to the CPU processing unit for management and execution; the CPU processing unit is a core unit, processes the acquired signals of the tail end to carry out operation and analysis, and sends the information data to the remote area management machine through an interface to implement unified management; the storage unit is used for storing cache data and logic execution programs, and the timing unit is used for recording parking time periods and calculation cycles; the signal decoding unit decodes the acquired chip data and then sends the decoded chip data to the CPU processing unit for analysis and processing; the analog-to-digital conversion circuit converts the filtered and screened signals into digital signals and sends the digital signals to the decoding unit for processing; the filtering and amplifying circuit is used for processing, filtering and screening the electromagnetic pulse signals and the interference signals sent by the signal conversion unit; the signal conversion unit converts the signal protocol acquired by the Bluetooth module into a protocol which can be identified by a CPU; the Bluetooth module receives a return signal from the low-frequency capture of the receiving and transmitting antenna, and sends the return signal to the signal conversion unit after frequency identification and screening; the transmitting and receiving antenna transmits and receives low-frequency signals and transmits Bluetooth frequency to capture the information of the vehicle license plate chip.
The parking management method applying the wireless sensor for sensing the license plate of the vehicle comprises the following steps:
step one), installing a wireless sensor on the ground of a parking place;
step two), when the vehicle enters the parking space, the wireless sensor automatically identifies the chip information on the license plate of the vehicle;
step three), the Bluetooth module in the wireless sensor transmits the sensed vehicle information to the CPU for processing, and the processed data is transmitted to the remote area manager through RS485 bus signals;
step four), the area management machine records the parking time and the leaving time of the vehicle, automatically charges and deducts the cost from the vehicle binding bank card, and sends the cost information to the vehicle owner.
The wireless sensor can also be arranged on a rail at the side of the parking space or a roadside curb or a road surface.
The invention has the positive effects that: 1. the license plate of the parking vehicle at the parking place, the information and the parking time record can be accurately judged; 2. the management cost of the parked vehicles is reduced; 3. the system integration management and the charging and charging are convenient and fast; 4. the space can be reduced, and the signal is not limited by the position; 5. the system investment cost is low; 6. inlay and install on the parking stall is subaerial, reduces the artificial damage of equipment.
Drawings
Fig. 1 is a schematic structural diagram of a wireless sensor of the present invention.
Fig. 2 is a schematic block diagram of a wireless sensor according to the present invention.
Detailed Description
As shown in figures 1 and 2, a wireless sensor for sensing a license plate of a vehicle comprises a bottom box 1 and a cover plate 2, wherein the bottom box 1 and the cover plate 2 are bonded together, a circular copper antenna with the diameter of 20MM/0.5MM is embedded in the cover plate 2, a circuit board is arranged in the bottom box 1, a wire outlet is arranged on the bottom box 1, a lead on the circuit board penetrates out of the wire outlet to be connected with an external power supply and a bus, an antenna on the connecting cover plate is directly plugged on the circuit board through a lead, the detected/tested circuit board is generally clamped in the bottom box 1 during manufacturing, processing and assembling, the lead is led out of the wire outlet and plugged into the cover plate antenna, then silica gel is filled and sealed for water prevention, and finally the cover plate 2 is bonded, a unit circuit is arranged on the circuit board and comprises a power supply unit, a signal isolation circuit, a bus interface, a CPU processing unit, a storage unit and a storage unit, Timing unit, signal decoding circuit, analog-to-digital conversion circuit, filtering amplification circuit, signal conversion unit, bluetooth module, receiving and dispatching antenna.
The power supply unit is connected with the signal isolation circuit and the CPU processing unit, converts the direct current 24V approaching from the far end into different voltages and supplies working power supplies required by different circuits and chips; the bus interface is an RS485 interface, follows an MODBUS protocol, and is a communication channel for receiving instruction data of a remote management host and sending local processing data; the signal isolation circuit is connected with the bus interface and the CPU, and carries out isolation coupling processing on a far-end signal sent by the docking unit channel, amplifies the far-end signal and sends the amplified far-end signal to the CPU for management and execution; the CPU processing unit is a core unit and is connected with the storage unit, the timing unit and the signal decoding circuit, the CPU processing unit processes signals collected by the tail end to carry out operation and analysis, and sends information data to the area management machine through an interface to implement unified management; the storage unit is used for storing cache data and logic execution programs, and the timing unit is used for recording parking time periods and calculation cycles; the signal decoding unit is connected with the analog-to-digital conversion circuit, and the signal decoding unit decodes the acquired chip data and then sends the decoded chip data to the CPU processing unit for analysis and processing; the analog-to-digital conversion circuit is connected with the filtering amplification circuit and converts the signals screened by filtering into digital signals to be sent to the decoding unit for processing; the filtering and amplifying circuit is connected with the signal conversion unit and is used for processing and filtering electromagnetic pulse signals and interference signals transmitted by signal conversion; the signal conversion unit is connected with the Bluetooth module and converts a signal protocol acquired by the Bluetooth module into a protocol recognizable by the CPU; the Bluetooth module is connected with the receiving and transmitting antenna, receives a return signal from the receiving and transmitting antenna, performs frequency identification and screening and then sends the return signal to the signal conversion unit; the transmitting and receiving antenna transmits and receives low-frequency signals and transmits Bluetooth frequency to capture the information of the vehicle license plate chip.
The parking management method applying the wireless sensor for sensing the license plate of the vehicle comprises the following steps:
step one), installing a wireless sensor on the ground of a parking place;
step two), when the vehicle enters the parking space, the wireless sensor automatically identifies the chip information on the license plate of the vehicle;
step three), the Bluetooth module of the wireless sensor transmits the sensed vehicle information to the CPU for processing, and the processed data is transmitted to the area manager through the RS485 bus;
and step four), the area management machine realizes recording of the parking time and the leaving time of the vehicle through networking with the system management platform, automatic charging and deduction of the cost from the vehicle binding bank card, and sending the cost information to the vehicle owner.
The wireless sensor in the step one) can also be arranged on a railing at the side of the parking space or a roadside curb or a road surface.

Claims (4)

1.一种感应车辆牌照的无线传感器,包括底盒和盖板,底盒和盖板粘接在一起,其特征在于:所述的盖板内设置有铜质天线,所述的底盒内设置有线路板,底盒上设置有出线孔,线路板上的引线穿出出线孔来连接外接供电及总线,盖板上的天线通过导线直接插到线路板上,所述的线路板上设置有单元电路,所述的单元电路包括电源单元、信号隔离电路、总线接口、CPU处理单元、存储单元、计时单元、信号解码电路、模数转换电路、滤波放大电路、信号转换单元、蓝牙模块、收发天线;所述的电源单元连接信号隔离电路、CPU处理单元,信号隔离电路连接总线接口、CPU处理单元,CPU处理单元连接存储单元、计时单元、信号解码电路,信号解码单元连接模数转换电路,模数转换电路连接滤波放大电路,滤波放大电路连接信号转换单元,信号转换单元连接蓝牙模块,蓝牙模块连接收发天线。1. A wireless sensor for sensing a vehicle license plate, comprising a bottom box and a cover plate, and the bottom box and the cover plate are bonded together, it is characterized in that: a copper antenna is provided in the described cover plate, and a copper antenna is provided in the described bottom box. A circuit board is provided, the bottom box is provided with an outlet hole, the lead wire on the circuit board is passed through the outlet hole to connect the external power supply and the bus, the antenna on the cover plate is directly inserted into the circuit board through the wire, and the circuit board is provided with There is a unit circuit, and the unit circuit includes a power supply unit, a signal isolation circuit, a bus interface, a CPU processing unit, a storage unit, a timing unit, a signal decoding circuit, an analog-to-digital conversion circuit, a filter amplifying circuit, a signal conversion unit, a Bluetooth module, A transceiver antenna; the power supply unit is connected to a signal isolation circuit and a CPU processing unit, the signal isolation circuit is connected to a bus interface and a CPU processing unit, the CPU processing unit is connected to a storage unit, a timing unit, and a signal decoding circuit, and the signal decoding unit is connected to an analog-to-digital conversion circuit. The analog-to-digital conversion circuit is connected to the filter amplifying circuit, the filter amplifying circuit is connected to the signal conversion unit, the signal conversion unit is connected to the bluetooth module, and the bluetooth module is connected to the transceiver antenna. 2.根据权利要求1所述的感应车辆牌照的无线传感器,其特征在于:所述的电源单元把远端接近来的直流24V进行转换为不同的几种电压,供应不同电路及芯片所需工作电源;所述的总线接口为RS485接口,遵循MODBUS协议,是接收远端管理主机的指令数据和发送本机处理数据的通讯通道;所述的信号隔离电路对接单元通道送来的远端信号进行隔离耦合处理并放大后送给CPU处理单元进行管理和执行;所述的CPU处理单元为核心单元,CPU处理单元是处理末端采集信号进行运算和分析,并把信息数据通过接口送往区域管理机实施统一管理;所述的存储单元是存储缓存数据和逻辑执行程序,所述的计时单元是记录停车时间段和计算周期;所述的信号解码单元对采集的芯片数据进行解码后送入CPU处理单元进行分析处理;所述的模数转换电路把滤波筛选出来的信号转换为数字信号送往解码单元进行处理;所述的滤波放大电路用于处理过滤掉信号转换送来的电磁脉冲信号和干扰信号;所述的信号转换单元把蓝牙模块采集到的信号协议转换为CPU可识别协议;所述的蓝牙模块接收来自收发天线低频捕获的返回信号,并进行频率识别和筛选后送往信号转换单元;所述的收发天线收发低频信号和发送蓝牙频率捕获车辆牌照芯片信息。2. The wireless sensor for sensing a vehicle license plate according to claim 1, wherein the power supply unit converts the DC 24V approaching from the far end into several different voltages, and supplies the required work of different circuits and chips The power supply; the bus interface is an RS485 interface, which follows the MODBUS protocol and is a communication channel for receiving the command data of the remote management host and sending the local processing data; the signal isolation circuit is connected to the remote signal sent by the unit channel. After isolation and coupling processing and amplification, it is sent to the CPU processing unit for management and execution; the CPU processing unit is the core unit, and the CPU processing unit processes the terminal acquisition signals for calculation and analysis, and sends the information data to the regional management machine through the interface. Implement unified management; the storage unit is to store the cache data and the logic execution program, the timing unit is to record the parking time period and the calculation cycle; the signal decoding unit decodes the collected chip data and sends it to the CPU for processing unit for analysis and processing; the analog-to-digital conversion circuit converts the filtered signal into a digital signal and sends it to the decoding unit for processing; the filter amplifying circuit is used to process and filter out the electromagnetic pulse signal and interference sent by the signal conversion. signal; the signal conversion unit converts the signal protocol collected by the bluetooth module into a protocol identifiable by the CPU; the bluetooth module receives the return signal from the low-frequency capture of the transceiver antenna, performs frequency identification and screening, and sends it to the signal conversion unit ; The transceiver antenna transmits and receives low-frequency signals and transmits bluetooth frequencies to capture vehicle license plate chip information. 3.一种应用权利要求2所述的感应车辆牌照的无线传感器的停车管理方法,其特征在于,包括以下步骤:3. a parking management method applying the wireless sensor of the induction vehicle license plate according to claim 2, is characterized in that, comprises the following steps: 步骤一)、在车位地面安装无线传感器;Step 1), install the wireless sensor on the ground of the parking space; 步骤二)、车辆进入车位,无线传感器自动识别车辆牌照上的芯片信息;Step 2) When the vehicle enters the parking space, the wireless sensor automatically identifies the chip information on the vehicle license plate; 步骤三)、无线传感器内的蓝牙模块将感应到的车辆信息传送给CPU处理单元进行处理,处理后的数据通过RS485总线信号发送给远端区域管理机;Step 3), the Bluetooth module in the wireless sensor transmits the sensed vehicle information to the CPU processing unit for processing, and the processed data is sent to the remote area management machine through the RS485 bus signal; 步骤四)、区域管理机记录车辆的停车时间和离开时间,自动计费并从车辆绑定银行卡中扣除费用,并将费用信息发送给车辆所有人。Step 4), the area management machine records the parking time and departure time of the vehicle, automatically charges and deducts the fee from the vehicle bound bank card, and sends the fee information to the vehicle owner. 4.根据权利要求3所述的应用感应车辆牌照的无线传感器的停车管理方法,其特征在于:所述的无线传感器还可以安装在车位侧面栏杆或者路边路牙或路面。4 . The parking management method using a wireless sensor for sensing vehicle license plates according to claim 3 , wherein the wireless sensor can also be installed on the side railings of the parking spaces, curbs or road surfaces. 5 .
CN202111451481.4A 2021-12-01 2021-12-01 A wireless sensor for sensing vehicle license plates and a parking management method using the same Pending CN114155739A (en)

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Application publication date: 20220308