KR100453767B1 - Wheel speed sensor for car - Google Patents
Wheel speed sensor for car Download PDFInfo
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- KR100453767B1 KR100453767B1 KR10-2002-0037798A KR20020037798A KR100453767B1 KR 100453767 B1 KR100453767 B1 KR 100453767B1 KR 20020037798 A KR20020037798 A KR 20020037798A KR 100453767 B1 KR100453767 B1 KR 100453767B1
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- wheel
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- speed sensor
- light
- circular plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/489—Digital circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/02—Devices characterised by the use of mechanical means
- G01P3/16—Devices characterised by the use of mechanical means by using centrifugal forces of solid masses
- G01P3/22—Devices characterised by the use of mechanical means by using centrifugal forces of solid masses transferred to the indicator by electric or magnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optical Transform (AREA)
Abstract
본 발명은 자동차용 휠 속도센서에 관한 것으로, 특히 자동차의 양측면 하단에 장착되어 있는 타이어를 보호하기 위한 휠에 발광부와 수광부를 장착함으로써, 휠 회전속도의 감지성능을 향상시킬 수 있도록 한 자동차용 휠 속도센서에 관한 것이다.The present invention relates to a wheel speed sensor for an automobile, and in particular, by mounting a light emitting unit and a light receiving unit on a wheel for protecting a tire mounted on both sides of the lower side of an automobile, thereby improving the sensing performance of the wheel rotation speed. It relates to a wheel speed sensor.
본 발명의 자동차용 휠 속도센서는, 자동차의 휠; 상기 휠의 회전축과 축결합되고, 원주를 따라 소정간격으로 천공된 다수개의 슬롯이 형성된 원형판; 상기 원형판의 일측에 설치되고, 상기 슬롯을 통해 소정의 빛을 발사하는 발광부; 상기 원형판의 타측에 설치되고, 상기 발광부로부터 발사되는 빛의 감지여부에 따른 펄스신호를 발생하는 수광부 및 상기 수광부로부터 출력되는 펄스신호의 횟수를 단위시간별로 카운팅하여 상기 휠의 회전속도를 측정하는 전자제어유닛을 포함하여 이루어진다.Wheel speed sensor for a vehicle of the present invention, the wheel of the vehicle; A circular plate axially coupled to the rotating shaft of the wheel and having a plurality of slots formed at predetermined intervals along a circumference thereof; A light emitting unit installed at one side of the circular plate and emitting predetermined light through the slot; It is installed on the other side of the circular plate, and counting the number of pulse signals output from the light receiving unit and the light receiving unit for generating a pulse signal according to whether the light emitted from the light emitting unit by unit time to measure the rotational speed of the wheel It comprises an electronic control unit.
Description
본 발명은 자동차용 휠 속도센서에 관한 것으로, 특히 자동차의 양측면 하단에 장착되어 있는 타이어를 보호하기 위한 휠에 발광부와 수광부를 장착함으로써, 휠 회전속도의 감지성능을 향상시킬 수 있도록 한 자동차용 휠 속도센서에 관한 것이다.The present invention relates to a wheel speed sensor for an automobile, and in particular, by mounting a light emitting unit and a light receiving unit on a wheel for protecting a tire mounted on both sides of the lower side of an automobile, thereby improving the sensing performance of the wheel rotation speed. It relates to a wheel speed sensor.
일반적으로, 자동차의 고성능화에 따라 강력하고 안정된 브레이크 성능을 확보함과 동시에 어떠한 조건에서도 충분한 제동력과 안정성을 보유하고 자동차를 정지시키는 것이 절실하게 요구되고 있다.In general, it is urgently required to secure a strong and stable brake performance according to the high performance of the vehicle and to stop the vehicle with sufficient braking force and stability under any conditions.
이러한 강력하고 안정된 브레이크의 성능을 확보하기 위한 가장 주요한 파라메타는 휠의 속도 변화를 정확하게 검출하는 것이다.The most important parameter to ensure the performance of this powerful and stable brake is to accurately detect the speed change of the wheel.
도 1은 종래의 자동차용 휠 속도센서를 개략적으로 나타낸 구성 개념도이다.1 is a schematic view showing a configuration of a conventional wheel speed sensor for a vehicle.
도 1에 도시한 바와 같이, 종래 자동차의 속도를 감지하기 위한 휠 속도센서는, 자석(1)에 코일을 소정의 권선비로 감은 후 휠의 회전에 따라 연동하여 회전하는 스틸(2)에 근접시킨다.As shown in FIG. 1, a wheel speed sensor for detecting a speed of a conventional vehicle winds a coil around a magnet 1 at a predetermined winding ratio, and then approaches the steel 2 which rotates in association with the rotation of the wheel. .
이때, 형성되는 전계에 의하여 자석(1)에 감겨있는 코일에는 전류가 흐르게 되는데, 자석(1)에서는 자장이 변화하기 때문에 전계도 변화하고 그에 따라 코일을 통하여 흐르는 전류의 크기도 변화하게 된다.At this time, current flows in the coil wound around the magnet 1 by the electric field formed. In the magnet 1, the magnetic field changes, so that the electric field also changes, and accordingly, the magnitude of the current flowing through the coil also changes.
상기 코일을 통하여 흐르는 전류는 제어부(10)에 입력되고, 제어부(10)는 입력되는 전류의 신호가 아날로그의 특성을 갖고 있으므로 A/D 변환하여 이 데이터를 기중으로 현재 휠의 속도를 인식하게 된다.The current flowing through the coil is input to the controller 10, and the controller 10 recognizes the current wheel speed based on the data by A / D conversion because the signal of the input current has an analog characteristic. .
그러나, 상기와 같이 동작하는 종래의 휠 속도센서에서는 검출되는 신호의 성격이 아날로그 상태이므로 제어부(10)가 전체적인 시스템의 제어 이외에 입력신호의 A/D 변환기능을 동시에 수행해야 함으로써, 제어부(10)의 부하가 급증하는 문제점이 있었다.However, in the conventional wheel speed sensor operating as described above, since the characteristic of the detected signal is an analog state, the controller 10 must simultaneously perform an A / D conversion function of the input signal in addition to the control of the overall system, thereby controlling the controller 10. There was a problem that the load of the surge.
본 발명은 전술한 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 자동차의 양측면 하단에 장착되어 있는 타이어를 보호하기 위한 휠에 발광부와 수광부를 장착함으로써, 휠 회전속도의 감지성능을 향상시킬 수 있도록 한 자동차용 휠 속도센서를 제공하는데 있다.The present invention has been made to solve the above-mentioned problems, an object of the present invention is to improve the detection performance of the wheel rotation speed by mounting the light emitting unit and the light receiving unit on the wheel for protecting the tires mounted on the lower side of both sides of the vehicle It is to provide a wheel speed sensor for automobiles.
전술한 목적을 달성하기 위하여 본 발명의 자동차용 휠 속도센서는, 자동차의 휠; 상기 휠의 회전축과 축결합되고, 원주를 따라 소정간격으로 천공된 다수개의 슬롯이 형성된 원형판; 상기 원형판의 일측에 설치되고, 상기 슬롯을 통해 소정의 빛을 발사하는 발광부; 상기 원형판의 타측에 설치되고, 상기 발광부로부터 발사되는 빛의 감지여부에 따른 펄스신호를 발생하는 수광부 및 상기 수광부로부터 출력되는 펄스신호의 횟수를 단위시간별로 카운팅하여 상기 휠의 회전속도를 측정하는 전자제어유닛을 포함하여 이루어진다.In order to achieve the above object, the wheel speed sensor for an automobile of the present invention includes a wheel of an automobile; A circular plate axially coupled to the rotating shaft of the wheel and having a plurality of slots formed at predetermined intervals along a circumference thereof; A light emitting unit installed at one side of the circular plate and emitting predetermined light through the slot; It is installed on the other side of the circular plate, and counting the number of pulse signals output from the light receiving unit and the light receiving unit for generating a pulse signal according to whether the light emitted from the light emitting unit by unit time to measure the rotational speed of the wheel It comprises an electronic control unit.
도 1은 종래의 자동차용 휠 속도센서를 개략적으로 나타낸 구성 개념도,1 is a schematic conceptual view showing a wheel speed sensor for a conventional vehicle;
도 2는 본 발명의 일 실시예에 따른 자동차용 휠 속도센서의 전체적인 구성도이다.2 is an overall configuration diagram of a wheel speed sensor for a vehicle according to an embodiment of the present invention.
*** 도면의 주요 부분에 대한 부호 설명 ****** Explanation of symbols on main parts of drawing ***
100 : 회전축, 200 : 원형판,100: rotation axis, 200: round plate,
250 : 슬롯, 300 : 발광부,250: slot, 300: light emitting unit,
400 : 수광부, 500 : 전자제어유닛(ECU)400: light receiving unit, 500: electronic control unit (ECU)
이하 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다. 본 실시예는 본 발명의 권리범위를 한정하는 것은 아니고, 단지 예시로 제시된 것이다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. This embodiment is not intended to limit the scope of the invention, but is presented by way of example only.
도 2는 본 발명의 일 실시예에 따른 자동차용 휠 속도센서의 전체적인 구성도이다.2 is an overall configuration diagram of a wheel speed sensor for a vehicle according to an embodiment of the present invention.
도 2에 도시한 바와 같이, 본 발명에 따른 자동차용 휠 속도센서는, 자동차에 장착되어 있는 바퀴(미도시)가 회전할 때 동시에 회전하면서 상기 바퀴의 타이어를 보호하는 휠(미도시)이 구비되는 바, 상기 휠의 중심으로부터 연장된 회전축(100)의 연장축상에는 원형판(200)이 일체로 형성되어 있고, 원형판(200)에는 원주를 따라 소정간격으로 천공된 슬롯(250)이 형성되어 있다.As shown in FIG. 2, the wheel speed sensor for a vehicle according to the present invention includes a wheel (not shown) that protects the tire of the wheel while simultaneously rotating the wheel (not shown) mounted on the vehicle. The bar 200 is integrally formed on the extension shaft of the rotating shaft 100 extending from the center of the wheel, and the slot plate 250 is formed in the circular plate 200 at predetermined intervals along the circumference. .
또한, 원형판(200)의 일측과 타측에는 상기 휠에 소정의 빛을 발사하는 발광부(300)와 발광부(300)에서 발사되는 빛을 감지하는 수광부(400)를 일직선상에 구비시키되, 천공된 슬롯(250)을 통하여 수광부(400)가 발광부(300)에서 발광되어진 신호를 입력받을 수 있도록 구성되어 있다.In addition, one side and the other side of the circular plate 200 is provided with a light emitting unit 300 for emitting a predetermined light to the wheel and a light receiving unit 400 for detecting the light emitted from the light emitting unit 300 in a straight line, perforation The light receiving unit 400 is configured to receive a signal emitted from the light emitting unit 300 through the slot 250.
그리고, 전자제어유닛(ECU ; 500)에서는 수광부(400)와 전기적으로 연결되어 있어 수광부(400)에서 출력되어진 펄스신호에 따라 휠의 회전속도를 측정할 수 있게 된다.In addition, the electronic control unit ECU 500 is electrically connected to the light receiving unit 400 so that the rotation speed of the wheel can be measured according to the pulse signal output from the light receiving unit 400.
미설명부호 450은 파형정형부로서 수광부(400)로부터 출력되는 펄스신호를 정형화시켜주는 기능을 한다.Reference numeral 450 serves as a waveform shaping unit to shape a pulse signal output from the light receiving unit 400.
이하에는 전술한 구성을 가지는 본 발명의 자동차용 휠 속도센서의 동작에 대해서 상세하게 설명하면, 상기 휠이 회전함에 따라 회전축(100)에 구비되어 있는 원형판(200)이 회전하게 된다.Hereinafter, the operation of the wheel speed sensor for a vehicle of the present invention having the above-described configuration will be described in detail. As the wheel rotates, the circular plate 200 provided on the rotating shaft 100 rotates.
이때, 발광부(300)에서 발생되는 광신호는 원형판(200)에 형성되어 있는 천공된 슬롯(250)을 통하여 수광부(400)에 전달되는데, 원형판(200)이 회전함에 따라 광신호의 전달과정이 온/오프(ON/OFF) 되어진다.At this time, the optical signal generated from the light emitting unit 300 is transmitted to the light receiving unit 400 through the perforated slot 250 formed in the circular plate 200, the optical signal transfer process as the circular plate 200 rotates Is turned on / off.
그리고, 수광부(400)는 광신호가 입력되면 하이(High)상태의 신호를 출력하고, 입력이 없는 경우에는 로우(Low)상태의 신호를 출력함으로써, 수광부(400)의 출력신호를 입력받는 전자제어유닛(500)은 수광부(400)의 출력신호가 하이/로우(High/Low) 상태로 전환되는 펄스신호의 횟수를 단위시간별로 카운팅하여 휠의 회전속도를 측정할 수 있다.The light receiver 400 outputs a high signal when an optical signal is input, and outputs a low signal when there is no input, thereby receiving an output signal of the light receiver 400. The unit 500 may measure the rotation speed of the wheel by counting the number of pulse signals at which the output signal of the light receiver 400 is converted into a high / low state for each unit time.
전술한 본 발명에 따른 자동차용 휠 속도센서에 대한 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명에 속한다.Although a preferred embodiment of the wheel speed sensor for a vehicle according to the present invention has been described above, the present invention is not limited thereto, and the present invention is not limited thereto, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible and this also belongs to the present invention.
이상에서 설명한 바와 같은 본 발명의 자동차용 휠 속도센서에 따르면, 자동차의 휠에 연장된 회전축의 연장축상에 원주를 따라 소정간격으로 천공된 슬롯을 갖는 원형판을 형성하고, 상기 원형판의 일측과 타측에는 발광부와 수광부를 일직선상에 구비시키며, 상기 수광부로부터 출력되는 펄스신호의 횟수를 단위시간별로 카운팅하여 휠의 회전속도를 측정함으로써, 상기 휠의 회전속도 감지성능을 더욱더 향상시키고, 전자제어유닛의 부담이 경감될 뿐만 아니라 구성 제조단가의 절감 및 상기 휠의 내부 공간을 효율적으로 활용할 수 있는 이점이 있다.According to the wheel speed sensor for a vehicle of the present invention as described above, the circular plate having a slot perforated at a predetermined interval along the circumference is formed on the extension axis of the rotating shaft extending to the wheel of the vehicle, and on one side and the other side of the circular plate The light emitting unit and the light receiving unit are provided in a straight line, and the rotation speed of the wheel is measured by counting the number of pulse signals output from the light receiving unit for each unit time, thereby further improving the rotational speed detection performance of the electronic control unit. Not only can the burden be reduced, there is an advantage of reducing the manufacturing cost and making efficient use of the inner space of the wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2002-0037798A KR100453767B1 (en) | 2002-07-02 | 2002-07-02 | Wheel speed sensor for car |
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|---|---|---|---|
| KR10-2002-0037798A KR100453767B1 (en) | 2002-07-02 | 2002-07-02 | Wheel speed sensor for car |
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| KR20040003179A KR20040003179A (en) | 2004-01-13 |
| KR100453767B1 true KR100453767B1 (en) | 2004-10-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101047432B1 (en) | 2005-06-04 | 2011-07-08 | 주식회사 만도 | Noise detection method of wheel speed sensor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040045218A (en) * | 2002-11-23 | 2004-06-01 | 현대자동차주식회사 | Apparatus for sensing wheel speed of vehicle |
| US20080303513A1 (en) * | 2007-06-08 | 2008-12-11 | Kelsey-Hayes Company | Wireless active wheel speed sensor |
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2002
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09119941A (en) * | 1995-10-24 | 1997-05-06 | Sumitomo Precision Prod Co Ltd | Optical sensor for detecting pulse |
| KR970048468A (en) * | 1995-12-30 | 1997-07-29 | 전성원 | ABS wheel speed sensor |
| KR19990058439A (en) * | 1997-12-30 | 1999-07-15 | 김영환 | Speed and rotation direction sensing device and method using wheel speed sensor |
| KR20020015779A (en) * | 2000-08-23 | 2002-03-02 | 이계안 | Mechanism for damping key-off vibration |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101047432B1 (en) | 2005-06-04 | 2011-07-08 | 주식회사 만도 | Noise detection method of wheel speed sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040003179A (en) | 2004-01-13 |
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