KR20110064007A - Apparatus for detecting fail of wheel velocity of a vehicle - Google Patents

Apparatus for detecting fail of wheel velocity of a vehicle

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KR20110064007A
KR20110064007A KR1020090120421A KR20090120421A KR20110064007A KR 20110064007 A KR20110064007 A KR 20110064007A KR 1020090120421 A KR1020090120421 A KR 1020090120421A KR 20090120421 A KR20090120421 A KR 20090120421A KR 20110064007 A KR20110064007 A KR 20110064007A
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South Korea
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wheel
wheel speed
speed sensor
vehicle
wheel velocity
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KR1020090120421A
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Korean (ko)
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KR101512522B1 (en
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박재현
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현대모비스 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/02—Control of vehicle driving stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Regulating Braking Force (AREA)

Abstract

PURPOSE: An apparatus for detecting errors of wheel velocity of a vehicle is provided to select one wheel velocity sensor among a plurality of wheel velocity sensors, to count a square wave signal offered from the selected wheel velocity sensor, and to detect wheel velocity errors. CONSTITUTION: The apparatus for detecting errors of wheel velocity of a vehicle is composed of a micro control unit(210) and a semiconductor circuit(220). The micro control unit is composed of a first wheel selecting unit(211); a first binary counter(212), and an operation unit(213). The first wheel selecting unit selects one wheel velocity sensor among a front left wheel velocity sensor(111); a front right wheel velocity sensor(112); a rear left wheel velocity sensor(113); and a rear right wheel velocity sensor(114). The first binary counter counts the outputted square wave signal and recognizes the wheel velocity. The operation unit carries out an operation for the vehicle stability and control on the basis of the detected wheel velocity. The semiconductor circuit on demand is composed of a second wheel selecting unit(222); a second binary counter(223); and a comparison unit(224). The second wheel selecting unit selects a wheel velocity sensor selected by the first wheel selecting unit. The comparison unit compares wheel velocities detected by the first and second binaries. If an error is greater than a critical value, the comparison unit outputs a system error signal to the operation unit.

Description

차량의 휠속도 오류 검출장치 {apparatus for detecting fail of wheel velocity of a Vehicle}{Apparatus for detecting fail of wheel velocity of a Vehicle}

본 발명은 차량의 휠속도 오류 검출장치에 관한 것으로서, 보다 상세하게는 각 휠에 장착된 휠속도센서들 중 안정적으로 구동하는 하나를 선택하여 상기 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도 오류를 검출하는 장치에 관한 것이다.The present invention relates to an apparatus for detecting a wheel speed error of a vehicle, and more particularly, selecting one of the wheel speed sensors mounted on each wheel to stably drive and counting a square wave signal output from the selected wheel speed sensor. A device for detecting a speed error.

최근의 차량에는 주행 안정성 향상 및 제동 안정성을 위하여 다양한 장치가 설치된다. 이러한 다양한 장치로서 휠의 슬립을 방지하기 위한 안티락브레이크 시스템(ABS: Anti-lock Brake System), 충돌제어시스템(TCS: Traction Control System) 및 차량 자세제어 시스템(ESP: Electronic Stability Program) 등이 있다.Recently, various vehicles are installed to improve driving stability and braking stability. Such various devices include an anti-lock brake system (ABS), a traction control system (TCS), and an electronic stability program (ESP) to prevent wheel slip. .

이러한 장치들에는 차량의 정확한 휠속도가 입력되어야만 주행 안정성 향상 및 제동을 위한 정확한 연산이 가능하다. 통상적으로 휠속도센서 톤 휠(Tone Wheel)이 회전할 경우 센서가 휠의 티스(teeth)를 감지하여 구형파를 발생시킨다. 이러한 구형파는 일정한 주기로 발생되는 것이 아니고 해당 휠속도에 따라 다른 주기를 갖게 된다. 특히, 휠의 회전속도가 낮은 경우에 휠속도센서는 긴 주기의 구형파를 발생시킨다. 이렇게 휠속도센서에서 전송되는 다른 주기의 구형파는 마이크로제어유닛(MCU)으로 입력되고, 마이크로제어유닛(MCU)은 구형파의 턴온/턴오프 시점을 이용하여 휠속도를 측정한다.These devices must be inputted with the correct wheel speed of the vehicle to enable accurate calculations for improved driving stability and braking. In general, when the wheel speed sensor tone wheel rotates, the sensor detects a tooth of the wheel and generates a square wave. These square waves are not generated at regular periods but have different periods depending on the corresponding wheel speeds. In particular, when the rotation speed of the wheel is low, the wheel speed sensor generates a long period square wave. The square wave of another period transmitted from the wheel speed sensor is input to the micro control unit (MCU), and the micro control unit (MCU) measures the wheel speed using the turn-on / turn-off timing of the square wave.

이때, 마이크로제어유닛이 고장나면 잘못 연산된 휠속도 정보가 상술한 ABS, TCS, ESP 등의 시스템에 전달되어 차량의 안정성 및 제동에 치명적인 위험을 가할 수 있다. 이를 방지하기 위해 종래에는 2개의 마이크로제어유닛을 이용하여 휠속도 오류를 검출하였다.At this time, when the micro control unit is broken, incorrectly calculated wheel speed information is transmitted to the above-described systems such as ABS, TCS, ESP, and the like, which may pose a fatal risk to the stability and braking of the vehicle. In order to prevent this, the conventional wheel speed error is detected using two micro control units.

도 1은 종래의 차량의 휠속도 오류 검출장치를 도시한 블록도이다.1 is a block diagram illustrating an apparatus for detecting a wheel speed error of a conventional vehicle.

차량의 4개의 바퀴에는 각각 휠속도센서가 장착되는데, 이는 왼쪽 앞바퀴에 장착된 전좌륜휠속도센서(111)와, 오른쪽 앞바퀴에 장착된 전우륜휠속도센서(112)와, 왼쪽 뒷바퀴에 장착된 후좌륜휠속도센서(113)와, 오른쪽 뒷바퀴에 장착된 후우륜휠속도센서(114)로 이루어진다.Each of the four wheels of the vehicle is equipped with a wheel speed sensor, which is a front left wheel speed sensor 111 mounted on the left front wheel, a front right wheel speed sensor 112 mounted on the right front wheel, and a rear left wheel mounted on the left rear wheel. It consists of a speed sensor 113, and the rear right wheel speed sensor 114 mounted on the right rear wheel.

전좌륜휠속도센서(111)와 전우륜휠속도센서(112)와 후좌륜휠속도센서(113)와 후우륜휠속도센서(114)에서 각각 출력되는 구형파신호는 제1마이크로제어유닛(120)의 휠속도연산부(121) 및 제2마이크로제어유닛(130)의 휠속도연산부(131)에 각각 입력되고, 각 휠속도연산부(121, 131)는 각각 독립적으로 각 바퀴들의 휠속도를 연산한다.The square wave signals output from the front left wheel speed sensor 111, the front right wheel speed sensor 112, the rear left wheel speed sensor 113, and the rear right wheel speed sensor 114 are respectively the wheel speed calculation unit of the first micro control unit 120. Input to the wheel speed calculation unit 131 of the 121 and the second micro control unit 130, respectively, each of the wheel speed calculation unit 121, 131 independently calculates the wheel speed of each wheel.

제1마이크로제어유닛(120)의 휠속도연산부(121)와 제2마이크로제어유닛(130) 의 휠속도연산부(131)에서 연산된 각 바퀴들의 휠속도 정보는 제1마이크로제어유닛(120)의 비교부(122)에 전달된다. 비교부(122)는 두 휠속도연산부(121, 131)로부터 입력된 각 바퀴들의 휠속도를 비교한다.Wheel speed information of each of the wheels calculated by the wheel speed calculator 121 of the first micro control unit 120 and the wheel speed calculator 131 of the second micro control unit 130 may be calculated from the first micro control unit 120. It is transmitted to the comparator 122. The comparator 122 compares the wheel speeds of the wheels input from the two wheel speed calculators 121 and 131.

비교결과 두 휠속도연산부(121, 131)에서 각각 연산된 4개 바퀴들의 휠속도가 임계값 이상 차이가 나면 시스템페일판단부(123)는 마이크로제어유닛을 포함한 시스템에 오류가 발생했음을 판단하고 이를 외부로 알려줌으로써 운전자가 차량에 대해 적절한 정비를 받을 수 있도록 한다.As a result of comparison, when the wheel speeds of the four wheels calculated by the two wheel speed calculating units 121 and 131 differ by more than a threshold value, the system fail determination unit 123 determines that an error has occurred in the system including the micro control unit, and determines the error. Inform the outside so the driver can get proper maintenance for the vehicle.

그러나, 상술한 휠속도 오류 검출장치는 2개의 마이크로제어유닛이 각각 독립적으로 휠속도를 연산하도록 설치되기 때문에 생산단가가 높고 마이크로제어유닛 주변에 다수의 소자들을 이용하여 회로를 구성해야 하기 때문에 부품수가 많아 생산공정이 복잡하다는 문제점이 있다. 또한, 마이크로제어유닛이 휠속도센서로부터 출력되는 구형파신호로부터 휠속도를 연산하여 그 결과로서 휠속도 오류를 판단하기 때문에 휠속도 오류를 판단하기까지 긴 시간이 소요되는 문제점이 있다.However, the above-described wheel speed error detection device is installed so that two micro control units calculate wheel speeds independently of each other. Therefore, the production cost is high and the number of parts must be configured by using a plurality of elements around the micro control unit. There are many problems that the production process is complicated. In addition, since the microcontrol unit calculates the wheel speed from the square wave signal output from the wheel speed sensor and determines the wheel speed error as a result, it takes a long time to determine the wheel speed error.

이 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 이발명의 목적은 하나의 카운터를 포함한 마이크로제어유닛과 별도의 주문형 반도체회로(ASIC; )로 제작된 바이너리카운터 및 비교기를 이용하고, 다수의 휠속도센서들 중 하나의 휠속도센서를 선택하여 그 선택된 휠속도센서로부터 제공되는 구형파신호를 카운팅함으로써 휠속도 오류를 검출하는 장치를 제공하기 위한 것이다.The present invention has been made to solve the above problems, the object of the present invention is to use a binary counter and a comparator made of a micro-control unit including a counter and a separate application-specific semiconductor circuit (ASIC;), It is to provide a device for detecting a wheel speed error by selecting one of the wheel speed sensors of the and the counting the square wave signal provided from the selected wheel speed sensor.

상기와 같은 목적을 이루기 위한 이 발명에 따른 차량의 휠속도 오류 검출장치는, 전좌륜휠속도센서와 전우륜휠속도센서와 후좌륜휠속도센서와 후우륜휠속도센서로부터 차량의 휠속도를 검출하여 차량의 주행 안정성 향상 및 제동을 위한 연산을 수행하는 마이크로제어유닛과, 상기 마이크로제어유닛이 검출한 차량의 휠속도의 오류를 검출하는 주문형 반도체회로를 포함한 차량의 휠속도 오류 검출장치에 있어서,The wheel speed error detecting apparatus for a vehicle according to the present invention for achieving the above object is, the front wheel wheel speed sensor, the front wheel wheel speed sensor, the rear wheel wheel speed sensor and the rear wheel wheel speed sensor to detect the wheel speed of the vehicle running In a wheel speed error detecting apparatus for a vehicle including a micro control unit for performing calculations for improving stability and braking, and an on-demand semiconductor circuit for detecting an error in the wheel speed of the vehicle detected by the micro control unit,

상기 마이크로제어유닛은 상기 전좌륜휠속도센서와 전우륜휠속도센서와 후좌륜휠속도센서와 후우륜휠속도센서 중 하나의 휠속도센서를 선택하는 제1휠선택부와, 상기 제1휠선택부에서 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 감지하는 제1바이너리카운터와, 상기 제1바이너리카운터에서 감지된 휠속도에 따라 차량의 주행 안정성 향상 및 제동을 위한 연산을 수행하는 연산부를 포함하고,The micro control unit includes a first wheel selection unit for selecting one wheel speed sensor among the front wheel wheel speed sensor, the front wheel wheel speed sensor, the rear wheel wheel speed sensor, and the rear wheel wheel speed sensor, and the wheel selected from the first wheel selector. A first binary counter that detects a wheel speed by counting a square wave signal output from the speed sensor, and an operation unit that performs calculations for improving driving stability and braking of the vehicle according to the wheel speed detected by the first binary counter; ,

상기 주문형 반도체회로는 상기 제1휠선택부가 선택한 휠속도센서를 선택하는 제2휠선택부와, 상기 제2휠선택부에서 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 감지하는 제2바이너리카운터와, 상기 제1바이너리카운터에서 감지된 휠속도와 상기 제2바이너리카운터에서 감지된 휠속도를 비교하여 그 오차가 임계값 이상이면 상기 연산부에게 시스템오류신호를 출력하는 비교부를 포함한 것을 특징으로 한다.The on-demand semiconductor circuit may include a second wheel selection unit for selecting a wheel speed sensor selected by the first wheel selection unit, and a second wheel selection unit for detecting wheel speed by counting a square wave signal output from the wheel speed sensor selected by the second wheel selection unit. And comparing the second binary counter with the wheel speed detected by the first binary counter and the wheel speed detected by the second binary counter, and outputting a system error signal to the calculator if the error is greater than or equal to a threshold value. It is done.

이상과 같이 이 발명에 따르면 하나의 휠속도센서로부터 제공되는 구형파신호를 턴온/턴오프를 카운팅하고 그 카운팅 결과를 비교하여 휠속도 오류를 검출하기 때문에, 부품 수와 생산비용을 절감할 수 있다. 또한, 4개의 휠속도센서의 출력신호 중 하나를 선택하여 휠속도 오류를 검출하기 때문에 안정적인 휠속도 오류 검출이 가능해진다.As described above, according to the present invention, since the square wave signal provided from one wheel speed sensor counts on / off and compares the counting result, the wheel speed error is detected, thereby reducing the number of parts and the production cost. In addition, since the wheel speed error is detected by selecting one of the output signals of the four wheel speed sensors, stable wheel speed error detection is possible.

이하, 첨부된 도면을 참조하면서 이 발명에 따른 실시예를 보다 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment according to the present invention.

이 발명은 바이너리카운터를 이용하여 휠속도센서로부터 출력되는 구형파신호의 턴오프 또는 턴온을 카운팅하여 그 2개의 카운팅 결과를 비교함으로써 휠속도 오류를 검출한다. 또한, 각 바퀴에 장착된 휠속도센서 중 하나의 휠속도센서를 선택하여 하나의 바퀴에서 감지되는 휠속도의 오류를 검출함으로써 시스템의 안정성을 도모한다.The present invention detects a wheel speed error by counting the turn-off or turn-on of a square wave signal output from the wheel speed sensor using a binary counter and comparing the two counting results. In addition, by selecting one of the wheel speed sensor mounted on each wheel to detect the error of the wheel speed detected in one wheel to improve the stability of the system.

도 2는 이 발명의 한 실시예에 따른 차량의 휠속도 오류 검출장치의 구성 블록도이다.2 is a block diagram illustrating an apparatus for detecting a wheel speed error of a vehicle according to an exemplary embodiment of the present invention.

차량의 4개의 바퀴에는 각각 휠속도센서가 장착되는데, 이는 왼쪽 앞바퀴에 장착된 전좌륜휠속도센서(111)와, 오른쪽 앞바퀴에 장착된 전우륜휠속도센서(112)와, 왼쪽 뒷바퀴에 장착된 후좌륜휠속도센서(113)와, 오른쪽 뒷바퀴에 장착된 후우륜휠속도센서(114)로 이루어진다.Each of the four wheels of the vehicle is equipped with a wheel speed sensor, which is a front left wheel speed sensor 111 mounted on the left front wheel, a front right wheel speed sensor 112 mounted on the right front wheel, and a rear left wheel mounted on the left rear wheel. It consists of a speed sensor 113, and the rear right wheel speed sensor 114 mounted on the right rear wheel.

이 발명에 따른 휠속도 오류 검출장치는 마이크로제어유닛(MCU)(210)과, 주문형 반도체회로(ASIC)(220)로 이루어진다.The wheel speed error detecting apparatus according to the present invention includes a micro control unit (MCU) 210 and an application-specific semiconductor circuit (ASIC) 220.

마이크로제어유닛(210)은 전좌륜휠속도센서(111)와 전우륜휠속도센서(112)와 후좌륜휠속도센서(113)와 후우륜휠속도센서(114) 중 하나의 휠속도센서를 선택하는 제1휠선택부(211)와, 제1휠선택부(211)에서 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 감지하는 제1바이너리카운터(212)와, 제1바이너리카운터(212)에서 감지된 휠속도에 따라 차량의 주행 안정성 향상 및 제동을 위한 연산을 수행하는 연산부(213)를 포함한다.The micro control unit 210 may include a first wheel for selecting one of the front wheel wheel speed sensor 111, the front wheel wheel speed sensor 112, the rear wheel wheel speed sensor 113, and the rear wheel wheel speed sensor 114. The first binary counter 212 and the first binary counter 212 that count the square wave signals output from the wheel speed sensor selected by the selector 211, the first wheel selector 211, and detect the wheel speed. It includes a calculation unit 213 for performing calculation for improving the driving stability and braking of the vehicle according to the detected wheel speed.

주문형 반도체회로(220)는 전좌륜, 전우륜, 후좌륜, 후우륜 중 하나를 선택하기 위한 선택기준값을 저장한 레지스터(221)와, 제1휠선택부(211)로부터 입력된 휠 선택신호와 레지스터(221)에 저장된 선택기준값을 이용하여 전좌륜 휠속도센 서(111)와 전우륜 휠속도센서(112)와 후좌륜 휠속도센서(113)와 후우륜 휠속도센서(114) 중 상기 제1휠선택부(211)와 동일한 휠속도센서를 선택하는 제2휠선택부(222)와, 제2휠선택부(222)에서 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 감지하는 제2바이너리카운터(223)와, 상기 제1바이너리카운터(212)에서 감지된 휠속도와 상기 제2바이너리카운터(223)에서 감지된 휠속도를 비교하여 그 오차가 임계값 이상이면 상기 연산부(213)에 시스템오류신호를 출력하는 비교부(224)를 포함한다.The on-demand semiconductor circuit 220 includes a register 221 storing a selection reference value for selecting one of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel, and a wheel selection signal input from the first wheel selection unit 211. The first among the front wheel wheel speed sensor 111, the front wheel wheel speed sensor 112, the rear wheel wheel speed sensor 113, and the rear wheel wheel speed sensor 114 using the selection reference value stored in the register 221. The wheel speed is detected by counting a square wave signal output from the second wheel selector 222 that selects the same wheel speed sensor as the first wheel selector 211 and the wheel speed sensor selected by the second wheel selector 222. The second binary counter 223 and the wheel speed detected by the first binary counter 212 and the wheel speed detected by the second binary counter 223 are compared with each other. And a comparison unit 224 for outputting a system error signal.

레지스터(221)에는 2비트의 선택기준값이 저장되는 바, 예컨대 2비트 레지스터의 저장값이 "00"이면 전우륜, "10"이면 전좌륜, "01"이면 후우륜, "11"이면 후좌륜을 각각 나타내며, 제2휠선택부(222)는 제1휠선택부(211)로부터 입력되는 휠 선택신호에 따라 전우륜, 전좌륜, 후우륜, 후좌륜 중 하나를 선택한다.The register 221 stores a 2-bit selection reference value. For example, if the stored value of the 2-bit register is "00", the front right wheel, "10" is the front left wheel, "01" is the rear right wheel, and "11" is the rear left wheel. The second wheel selector 222 selects one of the front right wheel, the front left wheel, the rear right wheel, and the rear left wheel according to the wheel selection signal input from the first wheel selection unit 211.

상술한 차량의 휠속도 오류 검출장치의 동작을 설명한다.The operation of the wheel speed error detection device of the vehicle described above will be described.

차량의 바퀴가 회전하면 각 바퀴에 장착된 휠속도센서들(111, 112, 113, 114)은 각 바퀴의 회전에 따른 구형파신호를 출력한다.When the wheels of the vehicle rotate, the wheel speed sensors 111, 112, 113, and 114 mounted on each wheel output a square wave signal according to the rotation of each wheel.

마이크로제어유닛(210)의 제1휠선택부(211)는 4개의 휠속도센서들 중 안정적으로 구동하는 하나의 휠속도센서를 선택하여 선택된 휠속도센서로부터 출력되는 구형파신호를 제1바이너리카운터(212)에게 전달하고, 제2휠선택부(222)가 동일한 휠속도센서를 선택하도록 휠 선택신호를 출력한다. 그러면, 제2휠선택부(222)는 휠 선택신호와 레지스터(221)에 저장된 선택기준값을 참조하여 휠속도센서를 선택하며 선택된 휠속도센서로부터 출력되는 구형파신호를 제2바이너리카운터(223)에게 전달한다.The first wheel selector 211 of the micro control unit 210 selects one wheel speed sensor that is stably driven among four wheel speed sensors to output a square wave signal output from the selected wheel speed sensor. 212), and outputs a wheel selection signal so that the second wheel selection unit 222 selects the same wheel speed sensor. Then, the second wheel selector 222 selects the wheel speed sensor with reference to the wheel selection signal and the selection reference value stored in the register 221 and transmits the square wave signal output from the selected wheel speed sensor to the second binary counter 223. To pass.

그러면, 제1바이너리카운터(212)와 제2바이너리카운터(223)는 동일한 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 검출하게 된다. 제1바이너리카운터(212)에서 검출된 휠속도는 연산부(213)에 전달되며, 연산부(213)는 해당 휠속도에 따라 차량의 주행 안정성 향상 및 제동을 위한 연산을 수행한다.Then, the first binary counter 212 and the second binary counter 223 detect the wheel speed by counting square wave signals output from the same wheel speed sensor. The wheel speed detected by the first binary counter 212 is transmitted to the calculating unit 213, and the calculating unit 213 performs calculation for improving driving stability and braking of the vehicle according to the corresponding wheel speed.

한편, 비교부(224)는 제1바이너리카운터(212)에서 검출된 휠속도와 제2바이너리카운터(223)에서 검출된 휠속도를 비교하여, 그 오차가 임계값 이상이면 상기 연산부(213)에게 시스템오류신호를 출력한다.Meanwhile, the comparison unit 224 compares the wheel speed detected by the first binary counter 212 with the wheel speed detected by the second binary counter 223, and if the error is greater than or equal to a threshold value, the comparator 213. Output a system error signal.

연산부(213)는 비교부(224)로부터 시스템오류신호가 입력되면, 시스템에 오류가 발생했음을 판단하고 페일세이프(failsafe)를 구동하며, 이를 외부로 알려줌으로써 운전자가 차량에 대해 적절한 정비를 받을 수 있도록 한다.When the system error signal is input from the comparator 224, the operation unit 213 determines that an error has occurred in the system, drives a failsafe, and informs the outside so that the driver can receive appropriate maintenance for the vehicle. Make sure

도 1은 종래의 차량의 휠속도 오류 검출장치를 도시한 구성 블록도,1 is a block diagram illustrating a conventional wheel speed error detecting apparatus for a vehicle;

도 2는 이 발명에 따른 차량의 휠속도 오류 검출장치를 도시한 구성 블록도이다.2 is a block diagram illustrating a device for detecting a wheel speed error of a vehicle according to the present invention.

<도면의 주요 부분에 대한 부호의 설명>   <Explanation of symbols for the main parts of the drawings>

111 : 전좌륜휠속도센서 112 : 전우륜휠속도센서111: front wheel wheel speed sensor 112: front wheel wheel speed sensor

113 : 후좌륜휠속도센서 114 : 후우륜휠속도센서113: rear wheel wheel speed sensor 114: rear wheel wheel speed sensor

210 : 마이크로제어유닛 211 : 제1휠선택부210: micro control unit 211: first wheel selector

212 : 제1바이너리카운터 213 : 연산부212: first binary counter 213: arithmetic unit

220 : 주문형 반도체회로 221 : 레지스터220: application specific semiconductor circuit 221: resistor

222 : 제2휠선택부 223 : 제2바이너리카운터222: second wheel selector 223: second binary counter

224 : 비교부224: comparison unit

Claims (3)

전좌륜휠속도센서와 전우륜휠속도센서와 후좌륜휠속도센서와 후우륜휠속도센서로부터 차량의 휠속도를 검출하여 차량의 주행 안정성 향상 및 제동을 위한 연산을 수행하는 마이크로제어유닛과, 상기 마이크로제어유닛이 검출한 차량의 휠속도의 오류를 검출하는 주문형 반도체회로를 포함한 차량의 휠속도 오류 검출장치에 있어서,The micro control unit detects the wheel speed of the vehicle from the front left wheel speed sensor, the front right wheel speed sensor, the rear left wheel speed sensor, and the rear right wheel speed sensor, and performs calculation for improving driving stability and braking of the vehicle. In the wheel speed error detection device of a vehicle including an on-demand semiconductor circuit for detecting the error of the detected wheel speed of the vehicle, 상기 마이크로제어유닛은 상기 전좌륜휠속도센서와 전우륜휠속도센서와 후좌륜휠속도센서와 후우륜휠속도센서 중 하나의 휠속도센서를 선택하는 제1휠선택부와, 상기 제1휠선택부에서 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 감지하는 제1바이너리카운터와, 상기 제1바이너리카운터에서 감지된 휠속도에 따라 차량의 주행 안정성 향상 및 제동을 위한 연산을 수행하는 연산부를 포함하고,The micro control unit includes a first wheel selection unit for selecting one wheel speed sensor among the front wheel wheel speed sensor, the front wheel wheel speed sensor, the rear wheel wheel speed sensor, and the rear wheel wheel speed sensor, and the wheel selected from the first wheel selector. A first binary counter that detects a wheel speed by counting a square wave signal output from the speed sensor, and an operation unit that performs calculations for improving driving stability and braking of the vehicle according to the wheel speed detected by the first binary counter; , 상기 주문형 반도체회로는 상기 제1휠선택부가 선택한 휠속도센서를 선택하는 제2휠선택부와, 상기 제2휠선택부에서 선택된 휠속도센서로부터 출력되는 구형파신호를 카운팅하여 휠속도를 감지하는 제2바이너리카운터와, 상기 제1바이너리카운터에서 감지된 휠속도와 상기 제2바이너리카운터에서 감지된 휠속도를 비교하여 그 오차가 임계값 이상이면 상기 연산부에게 시스템오류신호를 출력하는 비교부를 포함한 것을 특징으로 하는 차량의 휠속도 오류 검출장치.The on-demand semiconductor circuit may include a second wheel selection unit for selecting a wheel speed sensor selected by the first wheel selection unit, and a second wheel selection unit for detecting wheel speed by counting a square wave signal output from the wheel speed sensor selected by the second wheel selection unit. And comparing the second binary counter with the wheel speed detected by the first binary counter and the wheel speed detected by the second binary counter, and outputting a system error signal to the calculator if the error is greater than or equal to a threshold value. Wheel speed error detection device of the vehicle. 상기 제 1 항에 있어서, 상기 제1휠선택부는 상기 전좌륜휠속도센서와 전우륜휠속도센서와 후좌륜휠속도센서와 후우륜휠속도센서 중 가장 안정적으로 동작하는 휠속도센서를 선택하는 것을 특징으로 하는 차량의 휠속도 오류 검출장치.The vehicle according to claim 1, wherein the first wheel selector selects a wheel speed sensor that operates most stably among the front left wheel speed sensor, the front right wheel speed sensor, the rear left wheel speed sensor, and the rear right wheel speed sensor. Wheel speed error detection device. 제 1 항에 있어서, 상기 주문형 반도체회로는 선택기준값을 저장하는 레지스터를 더 포함하고, 상기 제1휠선택부는 상기 제2휠선택부에게 휠 선택신호를 출력하며, 상기 제2휠선택부는 상기 선택기준값과 상기 휠 선택신호를 이용하여 휠속도센서를 선택하는 것을 특징으로 하는 차량의 휠속도 오류 검출장치.The semiconductor device of claim 1, wherein the application specific semiconductor circuit further comprises a register configured to store a selection reference value, wherein the first wheel selector outputs a wheel select signal to the second wheel selector, and the second wheel selector selects the selection. And a wheel speed sensor is selected by using a reference value and the wheel selection signal.
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Publication number Priority date Publication date Assignee Title
US9193340B2 (en) 2013-10-31 2015-11-24 Electronics And Telecommunications Research Institute Wheel speed sensor interface, operation method thereof, and electronic control system including the same
KR20160055537A (en) 2014-11-10 2016-05-18 현대모비스 주식회사 System and Method for detecting fail of wheel velocity of a Vehicle

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DE19961504A1 (en) 1999-12-20 2001-06-28 Bosch Gmbh Robert Rotational speed signal error detection method for anti-slip or anti-lock regulation system of vehicle, involves detecting speed change based on specific condition involving pulse width of falling pulses of measurement signal
KR100799483B1 (en) 2003-05-01 2008-01-31 주식회사 만도 Device for diagnosing breakdown for a vehicle
JP2009128239A (en) 2007-11-26 2009-06-11 Mitsubishi Fuso Truck & Bus Corp Device and method for judging fault of vehicle speed sensor
KR101522032B1 (en) * 2009-09-16 2015-05-20 현대모비스 주식회사 apparatus for detecting fail of wheel velocity of a Vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9193340B2 (en) 2013-10-31 2015-11-24 Electronics And Telecommunications Research Institute Wheel speed sensor interface, operation method thereof, and electronic control system including the same
KR20160055537A (en) 2014-11-10 2016-05-18 현대모비스 주식회사 System and Method for detecting fail of wheel velocity of a Vehicle

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