CN103456173A

CN103456173A - RFID (radio frequency identification) jaywalking capture method

Info

Publication number: CN103456173A
Application number: CN 201210174844
Authority: CN
Inventors: 徐成琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2013-12-18

Abstract

The invention provides an RFID (radio frequency identification) technology and a radio frequency jaywalking capture system based on the RFID recognition technology. The RFID technology and the radio frequency jaywalking capture system are capable of monitoring and capturing jaywalking actions at intersections around the clock while being insusceptible to weather and environment. The system comprises an RFID electronic license plate, a card reader, and a high-definition digital camera. Equipment is installed on a road side vertical pole. During the process of data communication between the card reader and a vehicle with an electronic tag, the position of the vehicle can be acquired according to the intensity of received signals. When the vehicle enters a predetermined wireless jaywalking coverage area, the system triggers the high-definition camera to capture a first picture of the peccant vehicle running; if the vehicle continues to run in the wireless coverage area in the red light state, the high-definition camera is triggered to capture a second violation capture used as strong evidence for peccancy.

Description

The RFID candid photograph of making a dash across the red light

Technical field

The invention provides a kind of Jaywalking snapshot method based on applying on RFID recognition technology and RFID location technology basis, can conveniently realize intersection red light violation candid photograph, be applicable to the traffic intersection under all kinds of Traffic signal controls.

Background technology

At present, the red light violation capturing system that China is generally used mainly is divided into two classes: a class is to detect by coil-induced, the detecting device used is mostly annular coil, need to destroy road surface during construction, can suspend traffic and affect pavement life when repairing or install, and inductive coil is easily damaged by heavy vehicle, failure rate is higher.Another kind of is to detect act of violating regulations by the video detector be arranged on lighting lamp lever, and then the camera acquisition video image carries out analyzing and processing by the mode that virtual coil is set to image, thereby realizes making a dash across the red light candid photograph.But due to the crossing circumstance complication, once the jamming patterns such as reflective, shade are arranged in surveyed area, will affect the reliability that image is processed, Day-night shift also can cause the error of monitoring, if run into the inclement weathers such as rainy day, greasy weather, may cause the detectability of surveyed area to completely lose, so the candid photograph efficiency that video detects is lower.Also have in addition and propose to be monitored with radar, although its degree of accuracy is higher, because cost compare is high, so can not spread.

Thereby the RFID technology is a kind of radiofrequency signal of utilizing realizes contactless information transmission by electromagnetic induction or electromagnetic propagation, and automatically identifies the technology of identified thing.Its major advantage is waterproof, antimagnetic, high temperature resistant, long service life, can identify at a distance, reading speed soon, once can read a plurality of electronic tags, and environmental suitability is strong, is not subject to the impact of weather.Owing to can automatically identifying car, without Vehicle License Plate Recognition System, so in the traffic monitoring field, prospect of the application is widely arranged, the no-stop charging system used on highway at present utilizes the RFID technology exactly.

Summary of the invention

The detailed description of the invention a kind of specific implementation thought and implementation method of the capturing system that makes a dash across the red light based on RFID radio-frequency technique basis.

A set of complete RFID capturing system that makes a dash across the red light is comprised of following three parts:

(1) RFID electronic license plate: to vehicle, the RFID electronic license plate is installed, has been stored the information of vehicles through encrypting in this electronic license plate, the impossible interviewed system of the electronic license plate after encryption, effectively stopped the deck phenomenon.Each car only is equipped with an electronic license plate, and is attached on glass for vehicle window and cannot removes, once remove, just can not use.The data of electronic license plate can only be read by the wireless identification device of authorizing.

(2) card reader: card reader is arranged near crossing, antenna installation on rack cross-bar, the corresponding exploring antenna in each track.After having vehicle to enter the radio frequency signal district that read write line sends, vehicle-mounted electronic license plate receives the radiofrequency signal that card reader is sent.The association circuit that shakes is arranged in electronic license plate, and its frequency is identical with the frequency of card reader emission, and under electromagnetic excitation, association's circuit that shakes produces resonance, thereby obtain, energy starts the electronic license plate control circuit and radio circuit sends out the data that are stored in chip.After card reader reading information decoding, information of vehicles is delivered to the violation data processing enter and carry out the data processing.

(3) high definition camera: when signal lamp is that the red light card reader has detected vehicle through out-of-date, trigger the high-definition image collecting unit vehicles peccancy is carried out to image acquisition, and the Back ground Informations such as the act of violating regulations of vehicles peccancy, time violating the regulations, place violating the regulations are provided.

It is mainly to utilize the location algorithm of a set of RFID that the RFID red light violation is captured principle, and this algorithm, by communicating by letter between electronic tag and read write line, obtains radio frequency signal intensity level between the two and then calculates distance between the two.Set in advance according to the actual conditions at crossing the signal intensity regional value made a dash across the red light before the system operation, when the vehicle with electronic tag enters this zone, think and make a dash across the red light.

RFID makes a dash across the red light and captures control flow chart and see Figure of description 2

The accompanying drawing explanation

Fig. 1 is the RFID fundamental diagram that makes a dash across the red light

M101: read write line is outwards launched the radio carrier signal through emitting antenna

M102: when electronic tag enters the perform region of emitting antenna, electronic tag is activated, and the message code of self is gone out through antenna transmission

M103: the signal of antenna reception electronic tag emission, be transferred to read write line through the regulator of antenna, read write line is transferred to vehicle peccancy data processing centre (DPC) after to the information of vehicles decoding received.

Fig. 2 is the RFID candid photograph control flow chart that makes a dash across the red light

F101: when signal lamp is red signal, open the read write line function, now antenna sends carrier signal, prepares to receive the electronic labeling information of vehicles running red light

F102: when the car with electronic tag enters the predefined emitting antenna perform region of making a dash across the red light, card reader receives the information of vehicles peccancy

F103: trigger high definition camera and capture first act of violating regulations photo

F104: whether the position that calculates vehicle according to intensity and the signal transmission distance of reception of wireless signals, calculate vehicle has the behavior of advancing under red light phase

F105: when vehicle moves under red light phase, trigger high definition camera and capture second photo

F106: when signal lamp is green light signals, close the read write line function, now antenna does not send carrier signal, the electric current minimum that module consumes, and under this state, module can not be used

In sum, the present invention has following technical characterstic:

Utilize electronic tag for vehicles can effectively solve deck, deliberately pollute car plate, block the behaviors such as car plate

RFID has automatic identification vehicle functions, without the license plate image identification software, has solved because of the not fogging clear problem that causes the car plate None-identified

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

The candid photograph 1.RFID make a dash across the red light is characterized in that:

Utilize the vehicle in RFID recognition technology and each track of RFID location technology to be detected.
The candid photograph 2.RFID make a dash across the red light is characterized in that:

Effectively solve deck, deliberately pollute car plate, block the behavior such as car plate.
The candid photograph 3.RFID make a dash across the red light is characterized in that:

RFID has automatic identification vehicle functions, without the license plate image identification software, has solved because of the not fogging clear problem that causes the car plate None-identified.
The candid photograph 4.RFID make a dash across the red light is characterized in that:

Waterproof, antimagnetic, high temperature resistant, long service life, can identify at a distance, reading speed soon, once can read a plurality of electronic tags.