KR950004073A - Loop coil disconnection detection device and method of vehicle detector - Google Patents

Loop coil disconnection detection device and method of vehicle detector Download PDF

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Publication number
KR950004073A
KR950004073A KR1019930014761A KR930014761A KR950004073A KR 950004073 A KR950004073 A KR 950004073A KR 1019930014761 A KR1019930014761 A KR 1019930014761A KR 930014761 A KR930014761 A KR 930014761A KR 950004073 A KR950004073 A KR 950004073A
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KR
South Korea
Prior art keywords
disconnection
loop coil
vehicle
disconnection detection
detection
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Application number
KR1019930014761A
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Korean (ko)
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KR960003654B1 (en
Inventor
이정준
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이희종
금성산전 주식회사
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Priority to KR1019930014761A priority Critical patent/KR960003654B1/en
Publication of KR950004073A publication Critical patent/KR950004073A/en
Application granted granted Critical
Publication of KR960003654B1 publication Critical patent/KR960003654B1/en

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Classifications

    • 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

Abstract

본 발명은 차량감지기의 루프코일 단선 검출장치 및 그 방법에 관한 것으로, 종래에는 소프트웨어적인 알고리즘을 채용하여 최대 발진주파수를 검출하면 루프코일의 단선으로 판별함으로 부품의 특성오차, 현장조건 및 환경조건에 의해 발진주파수가 변화되어 검출결과의 신뢰성이 저하되고 실시간 검출이 안됨으로 운용상의 불편을 초래하는 문제점이 있었다. 이러한 점을 감안하여 본 발명에서는 루프코일 단선시 전류 흐름이 없음을 이용하여 하드웨어적 알고리즘을 채용한 것으로 부품의 특성차, 현장조건 및 환경조건등의 영향에 관계없이 차량감지의 실시간중에 단선유무를 검출할 수 있다. 따라서, 단선유무를 즉시 판별함에 의해 루프코일의 유지보수가 용이할 뿐 아니라 오데이타 수집을 방지할 수 있어 검출결과의 신뢰성과 교통 통제 관리의 효율성을 향상시킬 수 있다.The present invention relates to a loop coil disconnection detection device and a method thereof for a vehicle sensor, and conventionally employs a software algorithm to detect the maximum oscillation frequency and determine the disconnection of the loop coil to prevent component error, field conditions, and environmental conditions. Due to the change in the oscillation frequency, the reliability of the detection result is lowered and there is a problem that causes inconvenience in operation because it is not detected in real time. In view of this point, the present invention employs a hardware algorithm using no current flow when the loop coil is disconnected, and it is possible to detect the disconnection during the real-time detection of the vehicle irrespective of the effects of component characteristics, site conditions, and environmental conditions. Can be detected. Therefore, by immediately determining the disconnection, it is not only easy to maintain the roof coil, but also prevents data collection, thereby improving the reliability of the detection result and the efficiency of traffic control management.

Description

차량감지기의 루프코일 단선 검출장치 및 그 방법Loop coil disconnection detection device and method of vehicle detector

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명 차량감지기의 블럭도, 제4도는 제3도에 있어서, 단선 검출부의 회로도, 제5도는 제4도에 있어서, 단선 검출시의 파형도.FIG. 3 is a block diagram of the vehicle detector of the present invention, FIG. 4 is a circuit diagram of a disconnection detector in FIG. 3, and FIG. 5 is a waveform diagram of disconnection detection in FIG.

Claims (3)

발진구동부(4)의 고주파 발진출력을 임피던스 매칭부(5) 및 보호회로(6)를 통해 루프코일(7)에 전달하여 변화된 신호를 상기 발진구동부(4)에서 검출하고 이 검출된 아날로그신호가 신호변환부(3)를 통해 변환된 디지탈 레벨신호를 마이크로 프로세서(2)가 입력받아 상기 루프코일(7) 상의 차량점유 유무를 판별함과 아울러 그 결과를 표시부(1)에 출력하는 루프식 차량감지기에 있어서, 상기 루프코일(7)의 전류 흐름을 검출함에 따라 단선 검출신호(V1f)를 상기 마이크로 프로세서(2)에 출력하는 단선 검출부(8)를 포함하여 구성함을 특징으로 하는 차량감지기의 루프코일 단선 검출장치.The high frequency oscillation output of the oscillation driver 4 is transmitted to the loop coil 7 through the impedance matching unit 5 and the protection circuit 6 to detect the changed signal in the oscillation driver 4 and the detected analog signal is The loop type vehicle which receives the digital level signal converted by the signal converter 3 and determines whether the vehicle is occupied on the roof coil 7 and outputs the result to the display unit 1. A detector, comprising: a disconnection detector (8) for outputting a disconnection detection signal (V 1f ) to the microprocessor (2) in response to detecting a current flow of the loop coil (7). Loop coil disconnection detection device. 제1항에 있어서, 단선 검출부(8)는 저항(R1), 제너다이오드(ZD1)및 포토커플러(PC1)의 발광다이오드(PD1)를 병렬 접속하여 그 접속점을 임피던스 매칭부(5)와 보호회로(6)에 각기 접속하고 에미터가 접지된 상기 포토커플러(PC1)의 수광트랜지스터(PT1)의 콜렉터를 일측이 전압에 접속된 저항(R1)의 타측에 접속함과 어울러 마이크로프로세서(2)의 단선 검출 포트에 접속하여 구성함을 특징으로 하는 차량감지기의 루프코일 단선 검출장치.The disconnection detecting unit 8 according to claim 1, wherein the disconnection detection unit 8 connects the resistor R 1 , the zener diode ZD 1 , and the light emitting diode PD 1 of the photocoupler PC 1 in parallel, and connects the connection point thereof to the impedance matching unit 5. And the collector of the light receiving transistor PT 1 of the photocoupler PC 1 connected to the protection circuit 6 and the emitter grounded respectively, to the other side of the resistor R 1 connected to the voltage. A loop coil disconnection detection device for a vehicle sensor, characterized in that the circuit is connected to the disconnection detection port of the microprocessor (2). 차량감지의 실동작중 해당채널의 단선 검출신호(V1f)를 검출한 후 루프코일(7)의 단선 여부를 판별하여 단선이 아닐경우 다음 채널의 차량감지 및 루프코일 단선 여부를 판별하고 단선일 경우 해당채널의 차량감지동작을 정지함과 아울러 해당루프코일의 단선을 표시한 후 다음 채널의 차량감지 및 단선 여부 판별을 수행하는 차량감지기의 루프코일 단선 검출방법.After detecting the disconnection detection signal V 1f of the corresponding channel during the actual operation of the vehicle detection, it is determined whether the loop coil 7 is disconnected, and if it is not disconnected, the vehicle detection and the loop coil disconnection of the next channel are determined. If the vehicle detection operation of the corresponding channel is stopped and the loop coil is disconnected, and the vehicle detects and detects disconnection of the next channel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930014761A 1993-07-30 1993-07-30 Apparatus for detecting broken loop coil of automobile sensor KR960003654B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930014761A KR960003654B1 (en) 1993-07-30 1993-07-30 Apparatus for detecting broken loop coil of automobile sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930014761A KR960003654B1 (en) 1993-07-30 1993-07-30 Apparatus for detecting broken loop coil of automobile sensor

Publications (2)

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KR950004073A true KR950004073A (en) 1995-02-17
KR960003654B1 KR960003654B1 (en) 1996-03-21

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KR1019930014761A KR960003654B1 (en) 1993-07-30 1993-07-30 Apparatus for detecting broken loop coil of automobile sensor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100468467B1 (en) * 2002-01-12 2005-01-27 삼성전자주식회사 Receive line defective wiring checking apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100468467B1 (en) * 2002-01-12 2005-01-27 삼성전자주식회사 Receive line defective wiring checking apparatus

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KR960003654B1 (en) 1996-03-21

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