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 PDFInfo
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- 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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- 238000007726 management method Methods 0.000 title claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 42
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- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
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- 238000004364 calculation method Methods 0.000 claims description 4
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- 238000005859 coupling reaction Methods 0.000 claims description 3
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- 230000006698 induction Effects 0.000 claims description 2
- 238000004148 unit process Methods 0.000 claims description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 238000003032 molecular docking Methods 0.000 description 1
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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 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
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)
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CN202111451481.4A CN114155739A (en) | 2021-12-01 | 2021-12-01 | A wireless sensor for sensing vehicle license plates and a parking management method using the same |
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CN202111451481.4A CN114155739A (en) | 2021-12-01 | 2021-12-01 | A wireless sensor for sensing vehicle license plates and a parking management method using the same |
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Application publication date: 20220308 |