TWI502517B - Adaptive radio frequency tag comparison and customs clearance system and method - Google Patents

Description

Adaptive radio frequency tag comparison and customs clearance system and method

The invention relates to a vehicle traffic control technology for a control station gateway, which mainly compares the results of passive radio frequency identification (RFID) pass reading, license plate number identification or container number identification, and sets the RFID power. After reading the RFID pass, the delay is transmitted to the traffic comparison server, which can effectively avoid misreading the RFID pass of other vehicles, and thus the lack of pairing errors with the license plate number and the container number.

The vehicle traffic control technology of the control station gates will pass through the control station gates in a non-stop manner, and the vehicle identification number and container number of the passing vehicles will be analyzed by image recognition technology while the vehicles pass through the control station gates. In addition, the RFID reader installed on the vehicle is read by the RFID reader, and if the data matching in the database is correct, the release is performed. The reading rate of the RFID pass is proportional to the transmit power of the RFID antenna. In order to reduce the missed reading of the RFID pass, the transmit power of the RFID antenna will be increased to compensate the read rate of the RFID pass, so the gate of the control station is In the practice of RFID applications, when the radio frequency signal covers a range of about 10 meters, it is more suitable for the read rate. When the passing vehicle enters the gate of the control station, it will immediately touch the vehicle sensor and compare the license plate number obtained by the image recognition technology, the container number, and the RFID pass read by the RFID reader, but the RFID reading There is no obvious correlation with the vehicle sensor. In addition, the wireless RF signal covers a range of about 10 meters. Therefore, it is possible to read a vehicle RFID pass that does not maintain an appropriate distance, resulting in data with the preceding vehicle license plate number and container number. When the library is wrong, it will generate an error and alert it to make it correct that the vehicle cannot pass through the gateway. This will cause the gate of the control station to operate frequently and the alarm is missing.

It can be seen that there are still many shortcomings in the above-mentioned methods of use, which is not a good one. Design, and need to be improved.

In view of the shortcomings derived from the above-mentioned conventional methods, the inventor of the present invention has improved and innovated, and after painstaking research, finally succeeded in research and development of the "adaptive radio frequency tag comparison customs clearance system and method."

An adaptive radio frequency tag comparison and clearance system and method for achieving the above object, the RFID reader can set the transmission power of the antenna according to environmental requirements, and is matched with the automatic calculation of the RFID pass reading and then sent to the transit comparison server. Time to solve the problem of mismatching of vehicles before and after due to power adjustment. The delay time is calculated according to parameters such as the traffic speed of the traffic control station gate, the vehicle length and the antenna transmission power.

An adaptive radio frequency tag comparison and customs clearance system, comprising at least: an RFID pass, which is disposed on a windshield for vehicle identification use; and an RFID reader connected to an antenna to read the RFID pass An image recognition camera that utilizes image recognition technology to resolve license plate numbers and container numbers; a vehicle length detector for detecting the length of a vehicle passing through a gate of a control station; and a speed radar for detecting traffic control The speed of the station gate; an RFID controller that uses the vehicle length detector and the vehicle length and the speed parameter detected by the speed radar to instantly convert the delay time and read the data read by the RFID reader, The delay time is transmitted to the traffic comparison server; and a traffic comparison server is connected to the image recognition camera and the RFID controller, and the obtained license plate number, container number and RFID passport are compared to perform release.

An adaptive radio frequency tag comparison method includes: (a) setting an antenna transmit power of an RFID reader; and (b) detecting a vehicle length of a pass of a pass control station through a vehicle length detector; c) using a speed-measuring radar to detect the traffic speed of the vehicle access control station gateway; (d) using an RFID controller Obtaining the length of the vehicle and the speed parameter, calculating the delay time after the RFID passport is read and sent to a traffic comparison server; (e) reading the RFID passport through the RFID reader; (f) at the RFID controller Receiving the RFID reader to read the RFID passport, delaying the calculated delay time to the traffic comparison server; and (g) receiving the RFID passport reading data at the traffic comparison server, The RFID pass, license plate identification and container number identification data will be compared to perform the release.

The RFID controller calculates the delay time according to the antenna transmit power, the length of the vehicle, and the traffic speed parameter of the gateway of the pass control station, and recalculates the delay time when the next pass vehicle passes, and the RFID controller delays according to the delay time. And delaying the RFID passport data read by the RFID reader to the traffic comparison server.

The use of the adaptive radio frequency tag comparison and customs clearance system and method provided by the present invention has the following advantages when compared with other conventional technologies:

1. The invention can automatically calculate the delay time according to the size of the RFID reader power adjustment, avoiding the expansion of the power antenna due to the expanded coverage, and early sensing the RFID pass for the next intended vehicle, and the front vehicle has not completely separated from the comparison area. Previously, the RFID pass to the next vehicle was sent to the traffic comparison server, causing a problem of mismatching to the preceding vehicle.

2. The automatic conversion delay time of the present invention is calculated according to parameters such as the traffic speed of the traffic control station gate, the length of the vehicle and the antenna transmission power, and has the advantages of automatic real-time operation and elastic change according to different environments.

For a preferred embodiment, please refer to FIG. 1 and FIG. 2 , which are schematic diagrams of operation and operation of the adaptive radio frequency tag comparison and clearance system and method according to the present invention. The system mainly includes a vehicle sensor 101, an RFID reader 102, an antenna 103, an image recognition camera 104, a traffic comparison server 107, a vehicle length detector 108, an RFID controller 109, a speed radar 110, and an RFID pass 111.

The vehicle sensor 101 is connected to the traffic comparison server 107, which can determine whether the vehicle enters the comparison zone or the separation zone, and the front vehicle 105 and the rear vehicle 106 are vehicles that continue to pass the control station gate at the windshield. An RFID pass 111 is installed for vehicle identification use; the RFID reader 102 is coupled to the antenna 103 to read the RFID pass 111, and the RFID reader 102 can set the transmit power of the antenna port, and the RFID reader 102 The RFID pass 111 read by the antenna 103 is sent to the RFID controller 109, wherein the RFID controller 109 calculates the delay time according to the parameters of the transmit power, the vehicle length of the preceding vehicle 105, and the traffic speed, and delays the delivery to the RFID controller 109. The comparison is made with the server 107 and compared with the license plate number and the container number recognized by the image recognition camera 104.

The calculation of the delay time is as follows: Firstly, according to the principle of passage, when the vehicle contacts the vehicle sensor 101 to completely detach from the vehicle sensor 101, it is defined as the vehicle transit time T1, and during the period, the image is transmitted through the image. The camera 104 obtains the license plate number, the container number, and the RFID pass 111 read by the RFID reader 102, and sends the data to the traffic comparison server 107 within the vehicle transit time T1, and compares whether it is released or not. During the preceding vehicle 105 transit time T1, the identification data of the following vehicle 106 should not be sent to the traffic comparison server 107. If the RFID pass 111 of the following vehicle 106 is read by the RFID reader 102, the vehicle will be deferred. After passing the comparison time, it is sent to the system to avoid the comparison procedure of the preceding vehicle 105, wherein the vehicle transit time T1 is the vehicle length divided by the vehicle passing speed (as in Equation 1), wherein the vehicle length will be determined by the vehicle length The detector 108 measures and the vehicle passing speed is detected by the speed measuring radar 110.

T1=m/c (Formula 1)

m: vehicle length; c: vehicle speed.

On the other hand, the general license plate number and container number image recognition technology can determine that the vehicle has entered via the vehicle sensor 101, and perform continuous image acquisition to analyze the license plate and container number of the preceding vehicle 105. Since the rear vehicle 106 has not entered, the image recognition is performed. It will not start, there is no possibility to analyze the license plate and container number of the car 106 early, but the wireless signal reading range can be adjusted according to the environment. The RFID pass reading distance can be close, and there is no obvious correlation with the vehicle sensor 101. It is determined by the vehicle sensor 101 whether the read RFID pass belongs to the vehicle, and the RFID pass 111 of the following vehicle 106 may be read because the wireless signal is too strong during the vehicle transit time of the vehicle (front vehicle) 105. Mistaken into the comparison process of the preceding vehicle 105 caused an error. Therefore, the farther the read distance is, the longer the delay should be sent to the pass comparison server 107. The standard radio wave formula calculates the RFID pass 111 reading distance R according to different antenna transmit powers (as in Equation 2), and deducts the antenna. After the distance from the vehicle 101 to the vehicle sensor 101, the time at which the RFID pass 111 on the vehicle is read to the rear vehicle 106 to the vehicle sensor 101 is calculated as the delay time T2 required for power impact (as in Equation 3).

τ: Pulse length of transmitted wave pulse width; λ: Wave length wavelength; k: Boltzmann's constant Boltzmann constant; Nv: Noise figure of the receiver noise coefficient; SNR: Signal-to-noise Ratio signal noise ratio ; Pt: Transmitted power; G: Antenna gain; σ: Radar cross section; T: Absolute temperature in °K absolute temperature; B: Bandwidth bandwidth; L: Loss loss.

T2=(R‧cos θ-d)/c (Formula 3)

R: RFID pass reading distance; θ: horizontal angle between the antenna and the direction of the vehicle; d: distance from the antenna to the vehicle sensor; c: vehicle passing speed.

Taking the above-mentioned times T1 and T2 as the maximum value, that is, the delay time is designed for the present invention, that is, the RFID reader 102 is sent to the RFID controller 109 immediately after reading the RFID passport 111 through the antenna 103, but the RFID controller 109 The delay time calculated according to the above calculation is sent to the traffic comparison server 107 to avoid mismatching the RFID pass 111 of the following vehicle 106 to the preceding vehicle 105 too early.

When the vehicle length detector 108 and the speed measuring radar 110 obtain the vehicle length and the passing speed of the preceding vehicle 105, the delay time is calculated, and after the delay time calculation is completed, the RFID pass 111 is read immediately, and the vehicle length detection is waited for. The detector 108 and the speed measuring radar 110 re-calculate the delay time after detecting the next vehicle, and apply it immediately.

The detailed description of the present invention is intended to be illustrative of a preferred embodiment of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

To sum up, this case is not only innovative in terms of technical thinking, but also has many of the above-mentioned functions that are not in the traditional methods of the past. It has fully complied with the statutory invention patent requirements of novelty and progressiveness, and applied for it according to law. Approved this invention patent application, in order to invent invention, to the sense of virtue.

101‧‧‧Vehicle Perceptron

102‧‧‧RFID reader

103‧‧‧Antenna

104‧‧‧Image recognition camera

105‧‧‧Before the car

106‧‧‧ After the car

107‧‧‧Communication comparison server

108‧‧‧Vehicle length detector

109‧‧‧RFID controller

110‧‧‧Speed radar

111‧‧‧RFID Pass

The detailed description of the present invention and its accompanying drawings will be further understood, and the technical contents of the present invention and the functions thereof can be further understood. FIG. 1 is a view showing the operation of the adaptive radio frequency tag comparison and clearance system and method of the present invention. FIG. 2 is a flow chart showing the operation of the adaptive radio frequency tag comparison and clearance system and method of the present invention.

101‧‧‧Vehicle Perceptron

102‧‧‧RFID reader

103‧‧‧Antenna

104‧‧‧Image recognition camera

105‧‧‧Before the car

106‧‧‧ After the car

108‧‧‧Vehicle length detector

110‧‧‧Speed radar

111‧‧‧RFID Pass

Claims (4)

An adaptive radio frequency tag comparison and customs clearance system, comprising at least: an RFID pass, which is disposed on a windshield for vehicle identification use; and an RFID reader connected to an antenna to read the RFID pass An image recognition camera that utilizes image recognition technology to resolve license plate numbers and container numbers; a vehicle length detector for detecting the length of a vehicle passing through a gate of a control station; and a speed radar for detecting traffic control The speed of the station gate; an RFID controller that uses the vehicle length detector and the vehicle length and the speed parameter detected by the speed radar to instantly convert the delay time and read the data read by the RFID reader, The delay time is transmitted to the traffic comparison server; and a traffic comparison server is connected to the image recognition camera and the RFID controller, and the obtained license plate number, container number and RFID passport are compared to perform release. An adaptive radio frequency tag comparison method includes: (a) setting an antenna transmit power of an RFID reader; and (b) detecting a vehicle length of a pass of a pass control station through a vehicle length detector; c) using a speed-measuring radar to detect the traffic speed of the vehicle access control station gateway; (d) calculating the delay time of the RFID pass reading and sending it to a traffic comparison server by using the vehicle length and the traffic speed parameter obtained by an RFID controller; (e) reading the RFID pass through the RFID reader; (f) receiving, at the RFID controller, the RFID reader reads the RFID passport, delaying the calculated delay time to the traffic comparison server; and (g) receiving the comparison server at the traffic Read the data to the RFID Pass, and compare the RFID pass, license plate identification and container number identification data to check whether the release is performed. An adaptive radio frequency tag comparison and customs clearance method according to claim 2, wherein the RFID controller calculates a delay time according to an antenna transmit power, a vehicle length, and a traffic speed parameter of a pass gate of the pass control station, and The delay time is recalculated as soon as the passing vehicle passes. An adaptive radio frequency tag comparison and customs clearance method according to claim 2, wherein the RFID controller delays the delay time and delays the RFID passport data read by the RFID reader to The pass is compared to the server.