WO2015152643A1 - Rotation angle sensing circuit for angle encoder - Google Patents

Rotation angle sensing circuit for angle encoder Download PDF

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Publication number
WO2015152643A1
WO2015152643A1 PCT/KR2015/003271 KR2015003271W WO2015152643A1 WO 2015152643 A1 WO2015152643 A1 WO 2015152643A1 KR 2015003271 W KR2015003271 W KR 2015003271W WO 2015152643 A1 WO2015152643 A1 WO 2015152643A1
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Prior art keywords
unit
output
angle
signal
angle encoder
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PCT/KR2015/003271
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French (fr)
Korean (ko)
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정경진
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금양산업(주)
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Priority to CN201580014928.8A priority Critical patent/CN106133475B/en
Publication of WO2015152643A1 publication Critical patent/WO2015152643A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses

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  • the present invention relates to a rotation angle detection circuit of an angle encoder, and more particularly, an angle for real-time output of the rotation speed and angle of the crankshaft as a voltage signal by comparing and analyzing a detection signal of an angle encoder attached to an engine crankshaft.
  • the rotation angle detection circuit of the encoder is a rotation angle detection circuit of the encoder.
  • marine diesel engines are mainly composed of a cylinder, a piston, a crankshaft and the like.
  • the crankshaft is assembled on the bed plate together with the main bearing cell to convert the up and down movement of the piston to the connecting rod to rotate the rotation and is an expensive product that occupies more than 10% of the engine price.
  • the crankshaft has undergone electronic control with the development of information processing technology.
  • an angle encoder is attached to the crankshaft to detect rotational speed and angle in real time to output a detection signal to the engine control system.
  • the engine control system receives the detection signal from the angle encoder and ideally controls the timing of the exhaust cycle and the intake cycle.
  • the above-mentioned angle encoder is mainly used optically and generally includes a light emitting part, a slit and a light receiving part.
  • An angle encoder having such a configuration detects whether light emitted from the light emitting unit passes through the slit and is input to the light receiving unit, and detects the rotation speed through arithmetic processing of the microprocessor.
  • the conventional angle encoder as described above has a limitation in the optimum operation of the engine due to the difficulty in detecting the accurate phase due to the limitation of the resolution, and the calculation method by the microprocessor is limited not only by the resolution of the encoder but also by the sampling period of the microprocessor. I have a problem. That is, as the analog signal is converted into a digital signal through a microprocessor, it is difficult to accurately detect the rotation angle due to the limitation of resolution.
  • An object of the present invention for solving the problems derived from the background art is to provide a rotation angle detection circuit of an angle encoder that can accurately detect the rotation angle of the crankshaft by improving the resolution.
  • a rotation angle detection circuit of an angle encoder that outputs a voltage signal, wherein the light emitted from the light emitting unit is detected through a plurality of channels, converted into an electrical signal, and then output the signal to the number of output pins corresponding to the channel.
  • a detection unit A plurality of comparators for receiving, comparing and outputting two signals selected from the signals output from the sensing unit, and being connected to a connection point where an input pin node of the comparator and an output pin node of the sensing unit are in contact with each other and input from the sensing unit
  • a comparison detector comprising a variable resistor for individually adjusting the respective signal strengths;
  • An output unit which receives the signal output from the comparator and amplifies and transmits the signal to an external output terminal; And a power supply unit for providing a constant voltage for driving the internal circuits of the sensing unit, the comparison detecting unit, and the output unit.
  • the comparison detection unit may further include a reset unit which initializes a signal input to the comparison detection unit to a preset signal when initial power is applied.
  • the comparison detecting unit receives the signal of the sensing unit, converts the signal into a VCC voltage signal, and outputs the converted VCC voltage signal from the comparison detecting unit.
  • the power supply unit may include a surge absorber connected to a power input terminal to protect an internal device from an external abnormal voltage.
  • the power supply unit may further include a plurality of capacitors connected in parallel with the surge absorber to form an attenuation filter circuit for blocking noise.
  • the present invention according to the embodiment, it is possible to operate the engine optimally by facilitating the phase detection according to the resolution improvement, and greatly improve the resolution without being limited by the sampling cycle of the microprocessor to precisely rotate the crank shaft rotation angle There is an effect that can be detected.
  • FIG. 1 is a circuit diagram showing a rotation angle sensing circuit of an angle encoder according to an embodiment of the present invention.
  • FIG. 2 is a circuit diagram illustrating a rotation angle sensing circuit of an angle encoder according to another embodiment of the present invention.
  • 3 and 4 are conceptual diagrams for explaining the principle of operation of the present invention.
  • the rotation angle detection circuit of the angle encoder on the premise that it is applied to the angle encoder attached to the crankshaft of the engine, by comparing and detecting the light emitted from the light emitting portion of the angle encoder The rotation speed and angle of the crankshaft are output as voltage signals.
  • FIG. 1 is a circuit diagram showing a rotation angle sensing circuit of an angle encoder according to an embodiment of the present invention.
  • the rotation angle detection circuit of the angle encoder largely includes a detection unit 200, a comparison detection unit 400, an output unit 600, and a power supply unit 800.
  • the sensing unit 200 detects the light emitted from the light emitting unit through a plurality of channels, converts the light into an electrical signal, and outputs a signal to the number of output pins corresponding to the channel.
  • the light emitted from the light emitting unit is input to the sensing unit 200 through a slit and a mask which is a structure of a conventional encoder, depending on the structure of the encoder may be excluded or added to the configuration of course.
  • the light input to the sensing unit 200 is transmitted to the comparison detection unit 400 to be described later through the output pins A1, A2, B1, B2, C1, D1, E1, and F1.
  • the comparison detection unit 400 a plurality of comparators (U5A, U5B, U5C, U5D) for receiving and comparing two signals selected from the signals output from the detection unit 200, and the A variable resistor connected to an input point where an input pin node of a comparator (U5A, U5B, U5C, U5D) and an output pin node of the sensing unit 200 are in contact with each other to individually adjust signal strengths input from the sensing unit 200. (VR1 to VR8).
  • the comparison detector 400 receives the signal from the detector 200 and converts the signal into a VCC voltage signal.
  • Zener diode U3 is connected to the variable resistors VR1, VR3, VR5, and VR7 connected to the (+) pins of the comparators U5A, U5B, U5C, and U5D, and used as a reference voltage source, and the comparators U5A, U5B, and U5C.
  • Zener diode U4 is connected to the variable resistors VR2, VR4, VR6, and VR8 connected to the negative pin of U5D), and is used as a reference voltage source.
  • the comparison detection unit 400 may further include a reset unit U2 having an output pin connected in parallel with the capacitor C1 and connected to the variable resistors.
  • the reset unit U2 may include the comparison detection unit when initial power is applied.
  • the signal input to 400 is initialized to a preset signal.
  • the output unit 600 receives a signal output from the comparators U5A, U5B, U5C, and U5D, amplifies it, and transmits it to an external output terminal.
  • the output unit 600 receives a VCC voltage signal from the comparison detection unit 400 and converts the VCC voltage signal to output the Vdc voltage signal.
  • the output unit 600 has a plurality of output pins (Q1 ⁇ Q4) is formed to transmit a signal to the corresponding number of external output terminals, in this embodiment, the external output terminals to Q1_OUTPUT, Q2_OUTPUT, MM_OUTPUT, MS_OUTPUT Is placed.
  • the high output timing of the Q1_OUTPUT is adjusted by the variable resistor VR1 and the low output timing is adjusted by the variable resistor VR2.
  • Each timing of the high output of the Q2_OUTPUT is adjusted by the variable resistor VR3, and the low output timing is adjusted by the variable resistor VR4.
  • Each timing of the high output of the MM_OUTPUT is adjusted by the variable resistor VR5, and the low output timing is adjusted by the variable resistor VR6.
  • Each timing of the high output of the MS_OUTPUT is adjusted by the variable resistor VR7, and the low output timing is adjusted by the variable resistor VR8.
  • the power supply unit 800 provides a constant voltage for driving the internal circuits of the detection unit 200, the comparison detection unit 400, and the output unit 800.
  • the power supply unit 800 may include a surge absorber SM1.
  • the surge absorber SM1 is connected to an input terminal of the power supply unit 800 to protect the internal device from an external abnormal voltage.
  • the power supply unit 800 may further include a plurality of capacitors C6, C7, and C8 connected in parallel with the surge absorber SM1, and the capacitors C6, C7, and C8 form attenuation filter circuits. To block noise.
  • the diode D1 connected between the surge absorber SM1 and the attenuation filter circuit serves to protect the elements of the internal circuit when reverse power is applied to Vdc_IN and 0Vdc_IN.
  • the regulator unit U7 shown in the power supply unit serves to supply stable power to the internal circuit as a constant voltage supply module, and the light emitting diode LD1 is adjusted in brightness by a resistor R15 to become a light source of the light emitting unit.
  • FIG. 2 is a circuit diagram illustrating a rotation angle sensing circuit of an angle encoder according to another embodiment of the present invention.
  • the angle encoder is divided into 90 degrees with one rotation of 360 degrees in four equal parts for the cycles of suction, compression, combustion and discharge. If this is divided into 1 upper limit (PHASE), 2 upper limit, 3 upper limit and 4 upper limit in the counterclockwise direction, two through holes having 90 degree phase angle for each upper limit are divided into 90 equal parts and the signal is divided into logic circuit AND, EXCLUSIVE OR, Since the signal is divided into 4 parts by NOR circuit, the angle detection resolution is divided into 360 parts for each upper limit, and 360 degrees are divided into 1440 by 1 rotation. In addition, each of the four signals (Q1, Q2, MM, MS) is precisely adjusted through a variable resistor so that the phase angle is exactly 90 degrees.
  • the circuit design for detecting the angle of rotation of the angle encoder according to the embodiment of the present invention described above, it is possible to operate the engine optimally by facilitating phase detection according to the improvement in resolution, and is not limited by the sampling cycle of the microprocessor. By greatly improving the resolution, it is possible to accurately detect the rotation angle of the crankshaft.
  • the present invention relates to a rotation angle detection circuit of an angle encoder, and more particularly, an angle for real-time output of the rotation speed and angle of the crankshaft as a voltage signal by comparing and analyzing a detection signal of an angle encoder attached to an engine crankshaft. It is available in the field of rotation angle sensing circuit of encoder.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The purpose of the present invention, which relates to a rotation angle sensing circuit for an angle encoder, is to provide a rotation angle sensing circuit for an angle encoder, which allows the rotation angle of a crankshaft to be precisely sensed by improving resolving power. To this end, the rotation angle sensing circuit for an angle encoder according to one embodiment of the present invention, which is applied to an angle encoder attached to the crankshaft of an engine and outputs, as voltage signals, the rotation number and angle of the crankshaft by comparing/detecting light emitted from the light-emitting unit of the angle encoder, comprises: a sensing unit for sensing the light emitted from the light-emitting unit through a plurality of channels, converting same into electrical signals, and then outputting the signals to output pins, the number of which corresponds to the channels; a comparison/detection unit comprising a plurality of comparators for receiving as inputs, comparing, and outputting two preselected signals among the signals output by the sensing unit and variable resistors, which are connected to connection points, where the input pin nodes of the comparators and the output pin nodes of the sensing unit come into contact with one another, and individually adjust the strengths of the respective signals input by the sensing unit; an output unit for receiving as inputs, amplifying, and transmitting to external output terminals the signals output by the comparators; and a power unit for providing a constant voltage for operating the internal circuits of the sensing unit, the comparison/detection unit, and the output unit.

Description

앵글 엔코더의 회전각 감지 회로Angle encoder rotation angle sensor
본 발명은 앵글 엔코더의 회전각 감지 회로에 관한 것으로서, 더욱 상세하게는 엔진의 크랭크 샤프트에 부착되는 앵글 엔코더의 감지신호를 비교 분석하여 상기 크랭크 샤프트의 회전수와 각도를 전압신호로 실시간 출력하는 앵글 엔코더의 회전각 감지 회로에 관한 것이다.The present invention relates to a rotation angle detection circuit of an angle encoder, and more particularly, an angle for real-time output of the rotation speed and angle of the crankshaft as a voltage signal by comparing and analyzing a detection signal of an angle encoder attached to an engine crankshaft. The rotation angle detection circuit of the encoder.
일반적으로 선박용 디젤엔진은 크게 실린더, 피스톤, 크랭크 샤프트 등으로 구성된다. 특히, 크랭크 샤프트는 메인 베어링 셀과 함께 베드 플레이트에 조립되어 피스톤의 상하 운동을 커넥팅 로드와 연결하여 회전운동으로 바꾸어 주는 역할을 하며 엔진 가격의 10% 이상을 차지하는 고가의 제품이다.In general, marine diesel engines are mainly composed of a cylinder, a piston, a crankshaft and the like. In particular, the crankshaft is assembled on the bed plate together with the main bearing cell to convert the up and down movement of the piston to the connecting rod to rotate the rotation and is an expensive product that occupies more than 10% of the engine price.
상기와 같은 크랭크 샤프트는 정보처리기술의 발달과 더불어 전자식 제어를 하게 되었으며, 이를 위해 앵글 엔코더를 상기 크랭크 샤프트에 부착하여 회전수와 각도를 실시간으로 감지함으로써 감지신호를 출력하여 엔진제어시스템으로 전송하게 된다. 이에 따라 엔진제어시스템은 앵글 엔코더로부터 감지신호를 전달받아 배기 사이클 및 흡입 사이클의 타이밍을 이상적으로 제어하게 된다.As described above, the crankshaft has undergone electronic control with the development of information processing technology. To this end, an angle encoder is attached to the crankshaft to detect rotational speed and angle in real time to output a detection signal to the engine control system. do. Accordingly, the engine control system receives the detection signal from the angle encoder and ideally controls the timing of the exhaust cycle and the intake cycle.
상기한 앵글 엔코더는 주로 광학식이 널리 사용되고 있으며 일반적으로 발광부와 슬릿 및 수광부로 포함한다. 이러한 구성으로 이루어지는 앵글 엔코더는 발광부에서 방출된 빛이 슬릿을 통과하여 수광부로 입력되는지의 여부를 감지하고 마이크로프로세서의 연산처리를 통해 회전수를 검출하게 된다.The above-mentioned angle encoder is mainly used optically and generally includes a light emitting part, a slit and a light receiving part. An angle encoder having such a configuration detects whether light emitted from the light emitting unit passes through the slit and is input to the light receiving unit, and detects the rotation speed through arithmetic processing of the microprocessor.
그러나, 상기와 같은 종래의 앵글 엔코더는 분해능의 제한으로 인해 정확한 위상 검출이 어려워 엔진의 최적 운전에 한계가 있으며, 마이크로프로세서에 의한 연산방식은 엔코더의 분해능뿐만 아니라 마이크로프로세서의 샘플링 주기에 의해 제약을 받게 되는 문제점이 있다. 즉, 마이크로프로세서를 통해 아날로그신호를 디지털신호로 변환함에 따라 분해능의 한계로 인해 정밀한 회전각 감지가 어려운 문제점이 있다.However, the conventional angle encoder as described above has a limitation in the optimum operation of the engine due to the difficulty in detecting the accurate phase due to the limitation of the resolution, and the calculation method by the microprocessor is limited not only by the resolution of the encoder but also by the sampling period of the microprocessor. I have a problem. That is, as the analog signal is converted into a digital signal through a microprocessor, it is difficult to accurately detect the rotation angle due to the limitation of resolution.
앞선 배경기술에서 도출된 문제점을 해결하기 위한 본 발명의 목적은, 분해능을 향상시켜 크랭크 샤프트의 회전각을 정밀하게 감지할 수 있도록 하는 앵글 엔코더의 회전각 감지 회로를 제공하는 것이다.SUMMARY OF THE INVENTION An object of the present invention for solving the problems derived from the background art is to provide a rotation angle detection circuit of an angle encoder that can accurately detect the rotation angle of the crankshaft by improving the resolution.
상기한 목적은, 본 발명의 실시예에 따라, 엔진의 크랭크 샤프트에 부착되는 앵글 엔코더에 적용되는 것으로, 상기 앵글 엔코더의 발광부로부터 방출되는 빛을 비교 검출하여 상기 크랭크 샤프트의 회전수와 각도를 전압신호로 출력하는 앵글 엔코더의 회전각 감지 회로에 있어서, 상기 발광부로부터 방출되는 빛을 복수개의 채널을 통해 감지하여 전기적인 신호로 변환환 후 상기 채널과 대응하는 수의 출력핀으로 신호를 출력하는 감지부와; 상기 감지부로부터 출력되는 신호들 중 기선택된 2개의 신호를 입력받아 비교 및 출력하는 복수개의 비교기와, 상기 비교기의 입력핀 노드와 상기 감지부의 출력핀 노드가 접하는 접속점과 연결되어 상기 감지부로부터 입력되는 각각의 신호 세기를 개별 조정하는 가변저항을 포함하는 비교검출부와; 상기 비교기로부터 출력되는 신호를 입력받아 증폭시켜 외부 출력단자에 전송하는 출력부; 및 상기 감지부와 비교검출부 및 출력부의 내부 회로를 구동시키기 위한 정전압을 제공하는 전원부;를 포함하는 것을 특징으로 하는 앵글 엔코더의 회전각 감지 회로에 의해 달성된다.The above object is applied to an angle encoder attached to a crank shaft of an engine according to an embodiment of the present invention, and compares and detects the light emitted from the light emitting part of the angle encoder to determine the rotation speed and angle of the crank shaft. A rotation angle detection circuit of an angle encoder that outputs a voltage signal, wherein the light emitted from the light emitting unit is detected through a plurality of channels, converted into an electrical signal, and then output the signal to the number of output pins corresponding to the channel. A detection unit; A plurality of comparators for receiving, comparing and outputting two signals selected from the signals output from the sensing unit, and being connected to a connection point where an input pin node of the comparator and an output pin node of the sensing unit are in contact with each other and input from the sensing unit A comparison detector comprising a variable resistor for individually adjusting the respective signal strengths; An output unit which receives the signal output from the comparator and amplifies and transmits the signal to an external output terminal; And a power supply unit for providing a constant voltage for driving the internal circuits of the sensing unit, the comparison detecting unit, and the output unit.
여기서, 상기 비교검출부는, 초기 전원 인가시 상기 비교검출부에 입력되는 신호를 기설정된 신호로 초기화시키는 리셋유닛을 더 포함할 수 있다.The comparison detection unit may further include a reset unit which initializes a signal input to the comparison detection unit to a preset signal when initial power is applied.
그리고, 상기 비교검출부는 상기 감지부의 신호를 입력받아 VCC 전압신호로 변환하여 출력하고, 상기 출력부는 상기 비교검출부로부터 VCC 전압신호를 입력받아 Vdc 전압신호로 변환하여 출력한다.The comparison detecting unit receives the signal of the sensing unit, converts the signal into a VCC voltage signal, and outputs the converted VCC voltage signal from the comparison detecting unit.
한편, 상기 전원부는, 전원 입력단에 연결되어 외부의 이상전압으로부터 내부 소자를 보호하는 서지흡수기를 포함할 수 있다. 이때, 상기 전원부는, 상기 서지흡수기와 병렬 연결되어 노이즈 차단을 위한 감쇄필터회로를 형성하는 복수개의 콘덴서를 더 포함할 수 있다.The power supply unit may include a surge absorber connected to a power input terminal to protect an internal device from an external abnormal voltage. In this case, the power supply unit may further include a plurality of capacitors connected in parallel with the surge absorber to form an attenuation filter circuit for blocking noise.
상기한 실시예에 따른 본 발명에 의하면, 분해능 향상에 따른 위상 검출을 용이하게 하여 엔진을 최적으로 운전할 수 있으며, 마이크로프로세서의 샘플링 주기에 제약받지않고 분해능을 크게 향상시켜 크랭크 샤프트의 회전각을 정밀하게 감지할 수 있는 효과가 있다.According to the present invention according to the embodiment, it is possible to operate the engine optimally by facilitating the phase detection according to the resolution improvement, and greatly improve the resolution without being limited by the sampling cycle of the microprocessor to precisely rotate the crank shaft rotation angle There is an effect that can be detected.
도1은 본 발명의 실시예에 따른 앵글 엔코더의 회전각 감지 회로를 도시하는 회로도이다.1 is a circuit diagram showing a rotation angle sensing circuit of an angle encoder according to an embodiment of the present invention.
도2는 본 발명의 다른 실시예에 따른 앵글 엔코더의 회전각 감지 회로를 도시하는 회로도이다.2 is a circuit diagram illustrating a rotation angle sensing circuit of an angle encoder according to another embodiment of the present invention.
도3 및 도4는 본 발명의 작동 원리를 설명하기 위한 개념도이다.3 and 4 are conceptual diagrams for explaining the principle of operation of the present invention.
이하, 첨부된 도면들을 참조하면서 본 발명의 바람직한 실시예에 대해 상세히 설명하기로 한다. 한편, 해당 기술분야의 통상적인 지식을 가진자로부터 용이하게 알 수 있는 구성과 그에 대한 작용 및 효과에 대한 도시 및 상세한 설명은 간략히 하거나 생략하고 본 발명과 관련된 부분들을 중심으로 상세히 설명하도록 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. On the other hand, illustrated and detailed description of the configuration and its operation and effects can be easily understood from those skilled in the art will be briefly or omitted and will be described in detail with respect to the parts related to the present invention.
특히, 본 발명의 실시예에 따른 앵글 엔코더의 회전각 감지 회로는, 엔진의 크랭크 샤프트에 부착되는 앵글 엔코더에 적용되는 것을 전제로 하며, 상기 앵글 엔코더의 발광부로부터 방출되는 빛을 비교 검출하여 상기 크랭크 샤프트의 회전수와 각도를 전압신호로 출력한다.In particular, the rotation angle detection circuit of the angle encoder according to an embodiment of the present invention, on the premise that it is applied to the angle encoder attached to the crankshaft of the engine, by comparing and detecting the light emitted from the light emitting portion of the angle encoder The rotation speed and angle of the crankshaft are output as voltage signals.
도1은 본 발명의 실시예에 따른 앵글 엔코더의 회전각 감지 회로를 도시하는 회로도이다.1 is a circuit diagram showing a rotation angle sensing circuit of an angle encoder according to an embodiment of the present invention.
도1의 실시예에 따른 앵글 엔코더의 회전각 감지 회로는, 크게 감지부(200), 비교검출부(400), 출력부(600), 및 전원부(800)를 포함한다.The rotation angle detection circuit of the angle encoder according to the embodiment of FIG. 1 largely includes a detection unit 200, a comparison detection unit 400, an output unit 600, and a power supply unit 800.
*먼저, 상기 감지부(200)는, 상기 발광부로부터 방출되는 빛을 복수개의 채널을 통해 감지하여 전기적인 신호로 변환환 후 상기 채널과 대응하는 수의 출력핀으로 신호를 출력한다.First, the sensing unit 200 detects the light emitted from the light emitting unit through a plurality of channels, converts the light into an electrical signal, and outputs a signal to the number of output pins corresponding to the channel.
여기서, 상기 발광부에서 방출되는 빛은 통상적인 엔코더의 구조인 슬릿과 마스크를 거쳐 감지부(200)에 입력되나, 엔코더의 구조에 따라 일부 구성이 제외되거나 추가될 수 있음은 물론이다.Here, the light emitted from the light emitting unit is input to the sensing unit 200 through a slit and a mask which is a structure of a conventional encoder, depending on the structure of the encoder may be excluded or added to the configuration of course.
상기 감지부(200)에 입력된 빛은 출력핀 A1, A2, B1, B2, C1, D1, E1, F1을 통해 후술할 비교검출부(400)로 전송한다.The light input to the sensing unit 200 is transmitted to the comparison detection unit 400 to be described later through the output pins A1, A2, B1, B2, C1, D1, E1, and F1.
다음으로, 상기 비교검출부(400)는, 상기 감지부(200)로부터 출력되는 신호들 중 기선택된 2개의 신호를 입력받아 비교 및 출력하는 복수개의 비교기(U5A,U5B,U5C,U5D)와, 상기 비교기(U5A,U5B,U5C,U5D)의 입력핀 노드와 상기 감지부(200)의 출력핀 노드가 접하는 접속점과 연결되어 상기 감지부(200)로부터 입력되는 각각의 신호 세기를 개별 조정하는 가변저항(VR1~VR8)을 포함한다. 이러한 비교검출부(400)는 상기 감지부(200)의 신호를 입력받아 VCC 전압신호로 변환하여 출력한다.Next, the comparison detection unit 400, a plurality of comparators (U5A, U5B, U5C, U5D) for receiving and comparing two signals selected from the signals output from the detection unit 200, and the A variable resistor connected to an input point where an input pin node of a comparator (U5A, U5B, U5C, U5D) and an output pin node of the sensing unit 200 are in contact with each other to individually adjust signal strengths input from the sensing unit 200. (VR1 to VR8). The comparison detector 400 receives the signal from the detector 200 and converts the signal into a VCC voltage signal.
여기서, 상기 비교기(U5A,U5B,U5C,U5D)의 (+)핀에 연결되는 가변저항 VR1, VR3, VR5, VR7에는 제너다이오드 U3이 연결되어 기준 전압원으로 사용되고, 상기 비교기(U5A,U5B,U5C,U5D)의 (-)핀에 연결되는 가변저항 VR2, VR4, VR6, VR8에는 제너다이오드 U4가 연결되어 기준 전압원으로 사용된다.Here, Zener diode U3 is connected to the variable resistors VR1, VR3, VR5, and VR7 connected to the (+) pins of the comparators U5A, U5B, U5C, and U5D, and used as a reference voltage source, and the comparators U5A, U5B, and U5C. Zener diode U4 is connected to the variable resistors VR2, VR4, VR6, and VR8 connected to the negative pin of U5D), and is used as a reference voltage source.
한편, 상기 비교검출부(400)는 출력핀이 콘덴서 C1과 병렬 연결되어 가변저항들과 접속하는 리셋유닛(U2)을 더 포함할 수 있으며, 이러한 리셋유닛(U2)은 초기 전원 인가시 상기 비교검출부(400)에 입력되는 신호를 기설정된 신호로 초기화시킨다.The comparison detection unit 400 may further include a reset unit U2 having an output pin connected in parallel with the capacitor C1 and connected to the variable resistors. The reset unit U2 may include the comparison detection unit when initial power is applied. The signal input to 400 is initialized to a preset signal.
다음으로, 상기 출력부(600)는, 상기 비교기(U5A,U5B,U5C,U5D)로부터 출력되는 신호를 입력받아 증폭시켜 외부 출력단자에 전송한다. 이러한 출력부(600)는 상기 비교검출부(400)로부터 VCC 전압신호를 입력받아 Vdc 전압신호로 변환하여 출력한다.Next, the output unit 600 receives a signal output from the comparators U5A, U5B, U5C, and U5D, amplifies it, and transmits it to an external output terminal. The output unit 600 receives a VCC voltage signal from the comparison detection unit 400 and converts the VCC voltage signal to output the Vdc voltage signal.
여기서, 상기 출력부(600)는 복수개의 출력핀(Q1~Q4)이 형성되어 이와 대응하는 수의 외부 출력단자에 신호를 전송하는데, 본 실시예에서는 외부 출력단자가 Q1_OUTPUT, Q2_OUTPUT, MM_OUTPUT, MS_OUTPUT으로 배치된다. 이때, 상기 Q1_OUTPUT의 하이(HIGH) 출력 각 타이밍은 가변저항 VR1로 조정하고, 로우(HIGH) 출력 타이밍은 가변저항 VR2로 조정한다. 상기 Q2_OUTPUT의 하이 출력 각 타이밍은 가변저항 VR3으로 조정하고, 로우 출력 타이밍은 가변저항 VR4로 조정한다. 상기 MM_OUTPUT의 하이 출력 각 타이밍은 가변저항 VR5로 조정하고, 로우 출력 타이밍은 가변저항 VR6으로 조정한다. 상기 MS_OUTPUT의 하이 출력 각 타이밍은 가변저항 VR7로 조정하고, 로우 출력 타이밍은 가변저항 VR8로 조정한다.Here, the output unit 600 has a plurality of output pins (Q1 ~ Q4) is formed to transmit a signal to the corresponding number of external output terminals, in this embodiment, the external output terminals to Q1_OUTPUT, Q2_OUTPUT, MM_OUTPUT, MS_OUTPUT Is placed. At this time, the high output timing of the Q1_OUTPUT is adjusted by the variable resistor VR1 and the low output timing is adjusted by the variable resistor VR2. Each timing of the high output of the Q2_OUTPUT is adjusted by the variable resistor VR3, and the low output timing is adjusted by the variable resistor VR4. Each timing of the high output of the MM_OUTPUT is adjusted by the variable resistor VR5, and the low output timing is adjusted by the variable resistor VR6. Each timing of the high output of the MS_OUTPUT is adjusted by the variable resistor VR7, and the low output timing is adjusted by the variable resistor VR8.
다음으로, 상기 전원부(800)는, 상기 감지부(200)와 비교검출부(400) 및 출력부(800)의 내부 회로를 구동시키기 위한 정전압을 제공한다.Next, the power supply unit 800 provides a constant voltage for driving the internal circuits of the detection unit 200, the comparison detection unit 400, and the output unit 800.
여기서, 상기 전원부(800)는 서지흡수기(SM1)를 포함할 수 있으며, 이러한 서지흡수기(SM1)는 전원부(800)의 입력단에 연결되어 외부의 이상전압으로부터 내부 소자를 보호한다. 이때, 상기 전원부(800)는 상기 서지흡수기(SM1)와 병렬 연결되는 복수개의 콘덴서(C6,C7,C8)를 더 포함할 수 있으며, 이러한 콘덴서(C6,C7,C8)는 감쇄필터회로를 형성하여 노이즈를 차단하는 역할을 한다.Here, the power supply unit 800 may include a surge absorber SM1. The surge absorber SM1 is connected to an input terminal of the power supply unit 800 to protect the internal device from an external abnormal voltage. In this case, the power supply unit 800 may further include a plurality of capacitors C6, C7, and C8 connected in parallel with the surge absorber SM1, and the capacitors C6, C7, and C8 form attenuation filter circuits. To block noise.
한편, 상기 서지흡수기(SM1)와 상기 감쇄필터회로 사이에 연결되는 다이오드 D1은 역방향 전원을 Vdc_IN과 0Vdc_IN에 인가했을 때 내부 회로의 소자를 보호하는 역할을 한다.On the other hand, the diode D1 connected between the surge absorber SM1 and the attenuation filter circuit serves to protect the elements of the internal circuit when reverse power is applied to Vdc_IN and 0Vdc_IN.
그리고, 상기 전원부에서 도시된 레귤레이터 유닛 U7은 정전압 공급 모듈로서 안정된 전원을 내부 회로에 공급하는 역할을 하고, 발광다이오드 LD1은 저항 R15에 의해 밝기가 조정되어 발광부의 광원이 된다.The regulator unit U7 shown in the power supply unit serves to supply stable power to the internal circuit as a constant voltage supply module, and the light emitting diode LD1 is adjusted in brightness by a resistor R15 to become a light source of the light emitting unit.
도2는 본 발명의 다른 실시예에 따른 앵글 엔코더의 회전각 감지 회로를 도시하는 회로도이다.2 is a circuit diagram illustrating a rotation angle sensing circuit of an angle encoder according to another embodiment of the present invention.
도2의 실시예에 따른 앵글 엔코더의 회전각 감지 회로는 앵글 엔코더의 회전 방향이 반대일 때 상술한 도1의 회로와 동일한 신호가 나오게 되는 것으로, 실질적인 회로구성은 동일하므로 상세한 설명은 생략하기로 한다.In the rotation angle detection circuit of the angle encoder according to the embodiment of FIG. 2, when the rotation direction of the angle encoder is reversed, the same signal as that of the circuit of FIG. 1 is output. Since the actual circuit configuration is the same, a detailed description thereof will be omitted. do.
상술한 실시예를 바탕으로 본 발명의 작동원리를 도3 및 도4를 참조하여 설명한다. 정밀한 제어를 위해 앵글 엔코더를 흡입, 압축, 연소, 배출의 사이클에 맞도록 360도 1회전을 4등분으로 하여 90도씩 분배한다. 이것을 반시계 방향으로 1상한(PHASE), 2상한, 3상한, 4상한으로 구분한다면 각 상한마다 90도 위상각을 가지는 2개의 관통홀을 90등분하여 그 신호를 논리회로 AND, EXCLUSIVE OR, EXCLUSIVE NOR 회로로 신호를 4등분 하므로 각 상한마다 각도 감지 분해능을 360등분하여 1회전 360도를 1440등분한다. 또한 4가지의 각 신호(Q1, Q2, MM, MS)가 정확하게 90도의 위상각이 되도록 가변저항을 통해 세밀하게 조정한다.The operation principle of the present invention will be described with reference to Figs. For precise control, the angle encoder is divided into 90 degrees with one rotation of 360 degrees in four equal parts for the cycles of suction, compression, combustion and discharge. If this is divided into 1 upper limit (PHASE), 2 upper limit, 3 upper limit and 4 upper limit in the counterclockwise direction, two through holes having 90 degree phase angle for each upper limit are divided into 90 equal parts and the signal is divided into logic circuit AND, EXCLUSIVE OR, Since the signal is divided into 4 parts by NOR circuit, the angle detection resolution is divided into 360 parts for each upper limit, and 360 degrees are divided into 1440 by 1 rotation. In addition, each of the four signals (Q1, Q2, MM, MS) is precisely adjusted through a variable resistor so that the phase angle is exactly 90 degrees.
지금까지 설명한 본 발명의 실시예에 따른 앵글 엔코더의 회전각 감지를 위한 회로설계에 의하면, 분해능 향상에 따른 위상 검출을 용이하게 하여 엔진을 최적으로 운전할 수 있으며, 마이크로프로세서의 샘플링 주기에 제약받지않고 분해능을 크게 향상시켜 크랭크 샤프트의 회전각을 정밀하게 감지할 수 있는 효과가 있다.According to the circuit design for detecting the angle of rotation of the angle encoder according to the embodiment of the present invention described above, it is possible to operate the engine optimally by facilitating phase detection according to the improvement in resolution, and is not limited by the sampling cycle of the microprocessor. By greatly improving the resolution, it is possible to accurately detect the rotation angle of the crankshaft.
전술한 내용은 후술할 발명의 청구범위를 더욱 잘 이해할 수 있도록 본 발명의 특징과 기술적 장점을 다소 폭넓게 상술하였다. 상술한 실시예들은 해당 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술적 사상의 범위에서 다양한 수정 및 변경이 가능할 것이다. 이러한 다양한 수정 및 변경 또한 본 발명의 기술적 사상의 범위 내라면 하기에서 기술되는 본 발명의 청구범위에 속한다 할 것이다.The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the claims that follow may be better understood. Embodiments described above may be variously modified and changed by those skilled in the art within the scope of the technical idea of the present invention. Such various modifications and changes will also fall within the scope of the claims as set forth below within the scope of the spirit of the present invention.
본 발명은 앵글 엔코더의 회전각 감지 회로에 관한 것으로서, 더욱 상세하게는 엔진의 크랭크 샤프트에 부착되는 앵글 엔코더의 감지신호를 비교 분석하여 상기 크랭크 샤프트의 회전수와 각도를 전압신호로 실시간 출력하는 앵글 엔코더의 회전각 감지 회로 분야에 이용가능하다.The present invention relates to a rotation angle detection circuit of an angle encoder, and more particularly, an angle for real-time output of the rotation speed and angle of the crankshaft as a voltage signal by comparing and analyzing a detection signal of an angle encoder attached to an engine crankshaft. It is available in the field of rotation angle sensing circuit of encoder.

Claims (5)

  1. 엔진의 크랭크 샤프트에 부착되는 앵글 엔코더에 적용되는 것으로, 상기 앵글 엔코더의 발광부로부터 방출되는 빛을 비교 검출하여 상기 크랭크 샤프트의 회전수와 각도를 전압신호로 출력하는 앵글 엔코더의 회전각 감지 회로에 있어서,It is applied to the angle encoder attached to the crank shaft of the engine, and compares and detects the light emitted from the light emitting portion of the angle encoder to the rotation angle detection circuit of the angle encoder for outputting the rotation speed and angle of the crank shaft as a voltage signal In
    상기 발광부로부터 방출되는 빛을 복수개의 채널을 통해 감지하여 전기적인 신호로 변환환 후 상기 채널과 대응하는 수의 출력핀으로 신호를 출력하는 감지부;A sensing unit which detects the light emitted from the light emitting unit through a plurality of channels, converts the light into an electrical signal, and outputs a signal to the number of output pins corresponding to the channel;
    상기 감지부로부터 출력되는 신호들 중 기선택된 2개의 신호를 입력받아 비교 및 출력하는 복수개의 비교기와, 상기 비교기의 입력핀 노드와 상기 감지부의 출력핀 노드가 접하는 접속점과 연결되어 상기 감지부로부터 입력되는 각각의 신호 세기를 개별 조정하는 가변저항을 포함하는 비교검출부;A plurality of comparators for receiving, comparing and outputting two signals selected from the signals output from the sensing unit, and being connected to a connection point where an input pin node of the comparator and an output pin node of the sensing unit are in contact with each other and input from the sensing unit A comparison detection unit including a variable resistor for individually adjusting the respective signal strengths;
    상기 비교기로부터 출력되는 신호를 입력받아 증폭시켜 외부 출력단자에 전송하는 출력부; 및An output unit which receives the signal output from the comparator and amplifies and transmits the signal to an external output terminal; And
    상기 감지부와 비교검출부 및 출력부의 내부 회로를 구동시키기 위한 정전압을 제공하는 전원부;A power supply unit providing a constant voltage for driving internal circuits of the detection unit, the comparison detection unit, and the output unit;
    를 포함하는 것을 특징으로 하는 앵글 엔코더의 회전각 감지 회로.Rotation angle detection circuit of the angle encoder comprising a.
  2. 제1항에 있어서,The method of claim 1,
    상기 비교검출부는, 초기 전원 인가시 상기 비교검출부에 입력되는 신호를 기설정된 신호로 초기화시키는 리셋유닛을 더 포함하는 것을 특징으로 하는 앵글 엔코더의 회전각 감지 회로.The comparison detecting unit further comprises a reset unit for initializing a signal input to the comparison detecting unit when the initial power is applied to a preset signal.
  3. 제1항에 있어서,The method of claim 1,
    상기 비교검출부는 상기 감지부의 신호를 입력받아 VCC 전압신호로 변환하여 출력하고,The comparison detection unit receives the signal of the detection unit and converts it into a VCC voltage signal and outputs it,
    상기 출력부는 상기 비교검출부로부터 VCC 전압신호를 입력받아 Vdc 전압신호로 변환하여 출력하는 것을 특징으로 하는 앵글 엔코더의 회전각 감지 회로.And the output unit receives a VCC voltage signal from the comparison detector and converts the VCC voltage signal into a Vdc voltage signal and outputs the converted Vdc voltage signal.
  4. 제1항에 있어서,The method of claim 1,
    상기 전원부는, 전원 입력단에 연결되어 외부의 이상전압으로부터 내부 소자를 보호하는 서지흡수기를 포함하는 것을 특징으로 하는 앵글 엔코더의 회전각 감지 회로.The power supply unit, the rotation angle detection circuit of the angle encoder, characterized in that it comprises a surge absorber connected to the power input terminal to protect the internal element from the external abnormal voltage.
  5. 제4항에 있어서,The method of claim 4, wherein
    상기 전원부는, 상기 서지흡수기와 병렬 연결되어 노이즈 차단을 위한 감쇄필터회로를 형성하는 복수개의 콘덴서를 더 포함하는 것을 특징으로 하는 앵글 엔코더의 회전각 감지 회로.The power supply unit, the angle of rotation angle detection circuit further comprises a plurality of capacitors connected in parallel with the surge absorber to form a damping filter circuit for blocking the noise.
PCT/KR2015/003271 2014-04-02 2015-04-02 Rotation angle sensing circuit for angle encoder WO2015152643A1 (en)

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