KR970026025A

KR970026025A - Car Tire Pressure Drop Alarm System

Info

Publication number: KR970026025A
Application number: KR1019950039296A
Authority: KR
Inventors: 하성창
Original assignee: 전성원; 현대자동차 주식회사
Priority date: 1995-11-02
Filing date: 1995-11-02
Publication date: 1997-06-24

Abstract

본 발명은 자동차 타이어 공기압 저하 경보시스템에 관한 것으로, 동일 차축의 좌우 휠 스피드센서(SL,SR)에서 입력된 휠 속도에 대응한 펄스 신호를 계수 및 비교하고 상기 조향각 검출센서에서 입력된 각도신호에 따라 출력단에서 소정레벨의 전압을 발생하는 전자제어장치(10)와, 이 전자제어장치의 출력단에서 발생한 전압에 의해 구동되는 경보발생수단(BZ,LW)을 구비하여 이루어진 것이다. 전자제어장치(10)는 좌우 휠 스피드센서(SL,SR)에서 발생한 펄스신호의 상승에지 또는 하강에지의 갯수를 계수하고, 단위시간이 지난후 좌우 휠 스피드센서에서 입력된 펄스의 갯수를 서로 비교한다. 비교된 펄스 갯수의 차이가 소정의 수 이상이고 입력된 조향각 검출센서의 각도신호가 중립위치에 있음이 확인될 때만이 릴레이 구동을 위한 소정레벨의 전압을 발생한다. 본 발명은 저렴한 비용으로 타이어의 공기압이 저하되어 있음을 시각 및 청각적으로 운전자에게 경고하여 줄 수 있으므로 타이어의 공기압 저하 및 펑크 발생에 의한 안전사고를 예방할 수 있는 장점이 있다.The present invention relates to an automobile tire pressure drop warning system, and counts and compares a pulse signal corresponding to a wheel speed input from the left and right wheel speed sensors (SL, SR) of the same axle and outputs the angle signal inputted from the steering angle detection sensor. Therefore, the electronic control device 10 generates a voltage of a predetermined level at the output terminal, and the alarm generating means BZ, LW driven by the voltage generated at the output terminal of the electronic control device. The electronic controller 10 counts the number of rising or falling edges of the pulse signal generated by the left and right wheel speed sensors SL and SR, and compares the number of pulses input from the left and right wheel speed sensors after the unit time passes. do. Only when it is confirmed that the difference in the number of pulses compared is more than a predetermined number and that the angle signal of the input steering angle detection sensor is in a neutral position, a voltage of a predetermined level for relay driving is generated. The present invention can warn the driver visually and audibly that the air pressure of the tire is lowered at a low cost, and thus, there is an advantage of preventing a safety accident due to a decrease in air pressure and a puncture of the tire.

Description

Car Tire Pressure Drop Alarm System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 자동차 타이어 공기압 저하 경보시스템의 전체 개략도,1 is an overall schematic diagram of an automobile tire air pressure drop warning system according to the present invention;

제2도(A),(B)는 각각 제1도에서 동일차축에 설치된 좌우 휠 스피드 센서의 출력 신호를 비교하기 위한 시간도표,2 (A) and (B) are time charts for comparing the output signals of the left and right wheel speed sensors installed on the same axle in FIG.

제3도는 제1도의 휠 스피드 센서의 설치예를 나타낸 간략도,3 is a simplified view showing an example of installation of the wheel speed sensor of FIG.

제4도는 본 발명에서 좌우 휠 스피드 센서의 출력신호로부터 좌우 휠 속도차이 검출 및 경보신호를 발생하는 전자제어장치의 동작을 나타낸 플로우 챠트.4 is a flow chart showing the operation of the electronic control device for generating the left and right wheel speed difference detection and the alarm signal from the output signal of the left and right wheel speed sensor in the present invention.

Claims

Four wheel speed sensors mounted on the axles adjacent to the wheels of the vehicle to detect the rotational speed of each wheel, steering angle detection sensors automatically attached to the steering column to generate the neutral position and steering angle signals of the steering wheel, An electronic controller which counts and compares pulse signals corresponding to the wheel speed input from the left and right wheel speed sensors and generates a voltage of a predetermined level at an output terminal according to the angle signal input from the steering angle detection sensor, and an output terminal of the electronic controller Automotive tire pressure drop warning system consisting of an alarm generating means driven by the voltage generated in the car.

The electronic control apparatus of claim 1, wherein the electronic controller counts the number of rising edges or falling edges of the pulse signal generated by the left and right wheel speed sensors, and the number of pulses input from the left and right wheel speed sensors after the unit time t is equal to each other. Car tire pressure drop alarm system characterized in that the comparison.

The vehicle tire pneumatic pressure drop warning system according to claim 2, wherein the left and right wheel speeds are considered equal when the difference in the number of compared pulses is ± 1 to 2.

The vehicle tire pneumatic pressure drop warning system according to claim 2, wherein when the difference in the number of compared pulses is more than a predetermined number, it is determined whether the angle signal inputted from the steering angle detection sensor corresponds to the neutral position.

The method of claim 2 or 4, wherein when the difference in the number of pulses compared is a predetermined number or more and the angle signal of the steering angle detection sensor corresponds to a neutral position, generating a voltage of a predetermined level for relay driving. A car tire air pressure drop alarm system.

The vehicle tire pneumatic pressure drop warning system according to claim 1, wherein the alarm generating means comprises a piezoelectric buzzer and / or a lamp bulb which is powered by an operation of a relay.

※ Note: The disclosure is based on the initial application.