WO2015152641A1 - Inductive sensor circuit - Google Patents

Inductive sensor circuit Download PDF

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Publication number
WO2015152641A1
WO2015152641A1 PCT/KR2015/003269 KR2015003269W WO2015152641A1 WO 2015152641 A1 WO2015152641 A1 WO 2015152641A1 KR 2015003269 W KR2015003269 W KR 2015003269W WO 2015152641 A1 WO2015152641 A1 WO 2015152641A1
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Prior art keywords
signal
circuit
control unit
operational amplifier
unit
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PCT/KR2015/003269
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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 CN201580014927.3A priority Critical patent/CN106164622B/en
Publication of WO2015152641A1 publication Critical patent/WO2015152641A1/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
    • G01D5/12—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 using electric or magnetic means
    • G01D5/14—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 using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—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 using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—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 using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/001—Calibrating encoders
    • 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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • 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
    • G01D5/12—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 using electric or magnetic means
    • G01D5/14—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 using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—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 using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature

Definitions

  • the present invention relates to an inductive sensor circuit, and more particularly, to an inductive sensor circuit for real-time detection and transmission of the cylinder exhaust valve position of the engine.
  • the inductive sensor which is one of the components used for the electronic control of the engine is attached to the cylinder exhaust valve of the engine to detect the position of the exhaust valve in real time to output the position signal and transmit to the central control system.
  • inductive sensors have been developed in the direction of reducing physical defects or measurement errors as they are used to detect the position attached to the engine.
  • the transmission device and the central control device interworking with the inductive sensor have ultrafast data transmission and processing capability.
  • the conventional inductive sensor has a remarkably slow response speed for detecting and outputting the position of the exhaust valve, which does not meet the performance of the transmission and the central controller. There is a problem.
  • An object of the present invention for solving the problems derived from the background art is to provide an inductive sensor circuit that can improve the response speed of sensing and outputting the position of the cylinder exhaust valve of an engine.
  • An inductive sensor circuit for outputting a position signal comprising: a capacitor connected in parallel with the inductor to form an oscillation circuit, a first operational amplifier configured to receive and amplify an oscillation waveform generated by the oscillation circuit as an electrical signal;
  • a sensing circuit unit including a filter unit configured to receive an electric signal amplified by the first operational amplifier and rectify and smooth the first signal, and a first control unit converting the rectified and smoothed electric signal into a first digital signal and outputting the first digital signal; ;
  • a second control unit which receives an analog signal measured by the micrometer and converts the signal into a second digital signal and outputs a linearized data signal by comparing the first digital signal with the first digital signal;
  • a linearization circuit unit including a zero adjuster and a span adjuster for adjusting
  • the sensing circuit unit may further include an oscillation control unit connected to an output terminal of the oscillation circuit to generate a frequency control signal, wherein the oscillation control unit controls the frequency of the oscillation waveform to adjust measurement sensitivity.
  • the power supply circuit unit may include a surge absorber that protects an internal device from an external abnormal voltage, and a coil and a capacitor which are connected in series and parallel with the surge absorber, respectively, to block a noise.
  • the response speed of the inductive sensor is implemented at 5Khz or more, thereby greatly improving the performance of the transmission device and the central control device interworking with it.
  • the measurement accuracy can be greatly improved.
  • FIG. 1 is a circuit diagram showing an inductive sensor circuit according to an embodiment of the present invention.
  • the inductive sensor circuit on the premise that the inductive sensor is attached to the cylinder exhaust valve of the engine, the inductor 210 and the micrometer (not shown) of the inductive sensor Detects the analog signal measured in real time and outputs the position signal of the exhaust valve.
  • the inductive sensor circuit as described above largely includes a sensing circuit unit 200, a linearization circuit unit 400, an output circuit unit 600, and a power circuit unit 800.
  • the sensing circuit unit 200 is connected to the inductor 210 in parallel with the capacitor 220 to form an oscillation circuit, and the first operational amplifier for receiving and amplifying the oscillation waveform generated by the oscillation circuit as an electrical signal ( 240, a filter unit 260 for rectifying and smoothing the electric signal amplified by the first operational amplifier 240, and an electric signal rectified and smoothed at the filter unit 260 as a first digital signal. And a first control unit 280 that converts the output.
  • the condenser 220 and the inductor 210 oscillate by forming a so-called tank circuit as an LCR parallel oscillation circuit.
  • the oscillation frequency at this time Becomes The oscillation waveform generates an eddy current by a metal material close to the inductor 210, and the undulation of the oscillation frequency is changed non-linearly by the eddy current.
  • the change value is transferred to the first operational amplifier and amplified by current, and then transferred to the -pin of the comparator U3A through the + pin of the comparator U2B and the resistor R1.
  • the comparators U2B, U3A, and flip-flops U2, U3 form a rectifying circuit to rectify the waveform at high speed without distortion, and the rectified waveform is smoothed by the operational amplifier U3B to pins CLK, Dout, CS / of the first control unit.
  • the SHDN is transmitted to the linearization circuit unit 400 to be described later.
  • the sensing circuit unit 200 may further include an oscillation control unit U1 connected to an output terminal of the oscillation circuit to generate a frequency control signal.
  • the oscillation control unit U1 may generate a frequency of the oscillation waveform. Control to adjust the measurement sensitivity.
  • the linearization circuit unit 400 receives an analog signal measured by the micrometer and converts the analog signal into a second digital signal and compares it with the first digital signal to output a linearized data signal.
  • a zero adjuster 460 for adjusting the zero point of the data signal
  • a span adjuster 480 for adjusting the maximum value of the zero point.
  • the second control unit 440 may be configured in the form of a single chip microprocessor in which an operation processing circuit, an input / output interface, and a memory are integrated, and the algorithm for linearization is stored in a program form.
  • the second control unit 440 and the micrometer are directly connected through a wire.
  • an A / D converter is built in the second control unit 440 to immediately convert a signal without passing through an external circuit. So that the processing speed is not delayed.
  • a method for linearization in the linearization circuit unit 400 a method of writing a line approximation method by a program, and inputting the output voltage of the external electric micrometer to + AN_IN and 0Vdc_AN of the second control unit and the There is a method of automatically inputting linearization to the second control unit 440 while simultaneously changing the distance between the inductor 210 and the metal material under measurement at a constant speed using an external small motor.
  • the zero point adjuster 460 and the span adjuster 480 are made of a variable resistor, and the variable resistor may be variously selected, such as a carbon film type or a summit type, depending on the use environment or design purpose.
  • the output circuit unit 600 receives a data signal output from the second control unit 440, converts it into an analog voltage signal, and outputs the third control unit 640, and the third control unit 640.
  • a second operational amplifier 660 that reads and outputs a sign of the voltage signal input from the second signal; and a third operational amplifier 680 amplifying the voltage signal input from the second operational amplifier 660 and transmitting the amplified voltage signal to an external output terminal. ).
  • the voltage signal output from the third control unit 640 is divided into resistors R17 and R18 and input to the + terminal of the second operational amplifier 660 through the pin Vout.
  • the voltage signal input to the second operational amplifier 660 is output to the output terminals + OUTPUT and 0Vdc_OUT by the I / V converter or the V / V amplifier circuit of the third operational amplifier 680 and transmitted to the outside.
  • the power circuit unit 800 provides a constant voltage for driving the circuit, and supplies a reference voltage to the A / D converter built in the second control unit 440.
  • the power circuit unit 800 may include a surge absorber, and the surge absorber 820 is connected to the input terminal of the power circuit unit 800 to protect the internal device from an external abnormal voltage.
  • the power circuit unit 800 may further include coils L1 and capacitors C11, C12, and C13 connected in series and parallel with the surge absorber 820, respectively.
  • C11, C12, and C13 form attenuation filter circuits to block noise.
  • PWM1 shown in the power circuit unit 800 is a constant voltage supply module to supply a stable power to the active element inside.
  • U6 is a precision constant voltage reference IC and supplies a reference voltage to the A / D converter built in the second control unit 440.
  • the response speed of the inductive sensor can be implemented at 5Khz or more, the performance of the transmission apparatus and the central control unit interworking with it can be greatly improved.
  • the measurement accuracy can be greatly improved.
  • the present invention relates to an inductive sensor circuit, and more particularly, it can be used in the field of inductive sensor circuit for real-time detection and transmission of the cylinder exhaust valve position of the engine.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The present invention relates to an inductive sensor circuit. The inductive sensor circuit according to one embodiment of the present invention for improving the response speed of a sensor comprises: a detection circuit unit comprising a condenser, which is connected in parallel to the inductor of the sensor and forms an oscillation circuit, a first operational amplifier for receiving as an input and amplifying the electrical signal of an oscillation waveform generated by the oscillation circuit, a filter unit for receiving as an input, rectifying, and smoothing the electrical signal amplified by the first operational amplifier, and a first control unit for converting into a first digital signal and outputting the electrical signal rectified and smoothed by the filter unit; a linearization circuit unit comprising a second control unit for receiving as an input an analogue signal measured by the micrometer of the sensor, converting same into a second digital signal, comparing the second digital signal with the first digital signal, and outputting a linearized data signal, a zero adjuster for adjusting the zero point of the data signal, and a span adjuster for adjusting the maximum value of the zero point; an output circuit unit comprising a third control unit for receiving as an input, converting into an analogue voltage signal, and outputting the data signal output by the second control unit, a second operational amplifier for reading and outputting the code of the voltage signal input by the third control unit, and a third operational amplifier for amplifying and transmitting to an external output terminal the voltage signal input by the second operational amplifier; and a power circuit unit for providing a constant voltage for circuit operation and supplying a reference voltage to an A/D converter embedded in the second control unit.

Description

인덕티브 센서 회로Inductive sensor circuit
본 발명은 인덕티브 센서 회로에 관한 것으로서, 더욱 상세하게는 엔진의 실린더 배기밸브 위치를 실시간 감지하여 전송하는 인덕티브 센서 회로에 관한 것이다.The present invention relates to an inductive sensor circuit, and more particularly, to an inductive sensor circuit for real-time detection and transmission of the cylinder exhaust valve position of the engine.
산업의 발전과 더불어 조선 산업에 필요한 엔진도 친환경화, 고효율의 성능을 가지는 발전을 하기 위해 전자식 제어가 제안되어 사용되고 있다.In addition to the development of the industry, the engine required for the shipbuilding industry has also been proposed and used for the development of eco-friendly, high-efficiency performance.
한편, 엔진의 전자식 제어를 위해 사용되는 구성 중 하나인 인덕티브 센서는 엔진의 실린더 배기밸브에 부착되어 상기 배기밸브의 위치를 실시간 감지함으로써 위치신호를 출력하여 중앙제어시스템으로 전송하게 된다.On the other hand, the inductive sensor, which is one of the components used for the electronic control of the engine is attached to the cylinder exhaust valve of the engine to detect the position of the exhaust valve in real time to output the position signal and transmit to the central control system.
이러한 인덕티브 센서는 엔진에 부착되어 위치를 감지하는 데에 사용되는 만큼 물리적인 결함이나 측정 오차를 줄이기 위한 방향으로 종래기술이 개발되어왔다. 이와 함께 정보처리기술이 발전함에 따라 상기 인덕티브 센서와 연동하는 전송장치와 중앙제어장치는 초고속 데이터 전송 및 처리 능력을 보유하게 되었다.Such inductive sensors have been developed in the direction of reducing physical defects or measurement errors as they are used to detect the position attached to the engine. In addition, with the development of information processing technology, the transmission device and the central control device interworking with the inductive sensor have ultrafast data transmission and processing capability.
그러나, 종래의 인덕티브 센서는 초고속 데이터 전송 및 처리 기술의 발전에도 불구하고, 배기밸브의 위치를 감지하고 출력하는데 소요되는 응답속도가 현저히 느려 이와 연동하는 전송장치 및 중앙제어장치의 성능에 미치지 못하는 문제점이 있다.However, despite the development of ultra-fast data transmission and processing technology, the conventional inductive sensor has a remarkably slow response speed for detecting and outputting the position of the exhaust valve, which does not meet the performance of the transmission and the central controller. There is a problem.
앞선 배경기술에서 도출된 문제점을 해결하기 위한 본 발명의 목적은, 엔진의 실린더 배기밸브의 위치를 감지하고 출력하는 응답속도를 향상시킬 수 있는 인덕티브 센서 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 an inductive sensor circuit that can improve the response speed of sensing and outputting the position of the cylinder exhaust valve of an engine.
상기한 목적은, 본 발명의 실시예에 따라, 엔진의 실린더 배기밸브에 부착되는 인덕티브 센서에 적용되는 것으로, 상기 인덕티브 센서의 인덕터와 마이크로미터에서 측정되는 아날로그신호를 실시간 감지하여 상기 배기밸브의 위치신호를 출력하는 인덕티브 센서 회로에 있어서, 상기 인덕터와 병렬 연결되어 발진회로를 형성하는 콘덴서와, 상기 발진회로에서 생성된 발진파형을 전기신호로 입력받아 증폭시키는 제1연산증폭기와, 상기 제1연산증폭기에서 증폭된 전기신호를 입력받아 정류 및 평활시키는 필터부와, 상기 필터부에서 정류 및 평활된 전기신호를 제1디지털신호로 변환하여 출력하는 제1제어유닛을 포함하는 감지회로부와; 상기 마이크로미터에서 측정된 아날로그신호를 입력받아 제2디지털신호로 변환하고 이를 기준으로 상기 제1디지털신호와 비교하여 선형화된 데이터신호를 출력하는 제2제어유닛과, 상기 데이터신호의 영점을 조정하는 영점조정기 및 상기 영점의 최대값을 조정하는 스판조정기를 포함하는 선형화회로부와; 상기 제2제어유닛에서 출력되는 데이터신호를 입력받아 아날로그 전압신호로 변환하여 출력하는 제3제어유닛과, 상기 제3제어유닛에서 입력되는 전압신호의 부호를 판독하여 출력하는 제2연산증폭기와, 상기 제2연산증폭기에서 입력되는 전압신호를 증폭시켜 외부 출력단자에 전송하는 제3연산증폭기를 포함하는 출력회로부; 및 회로 구동을 위한 정전압을 제공하고, 상기 제2제어유닛에 내장된 A/D컨버터에 기준전압을 공급하는 전원회로부;를 포함하는 것을 특징으로 하는 인덕티브 센서 회로에 의해 달성된다.The above object, according to an embodiment of the present invention, is applied to the inductive sensor attached to the cylinder exhaust valve of the engine, the exhaust valve by detecting the analog signal measured in the inductor and micrometer of the inductive sensor in real time An inductive sensor circuit for outputting a position signal, comprising: a capacitor connected in parallel with the inductor to form an oscillation circuit, a first operational amplifier configured to receive and amplify an oscillation waveform generated by the oscillation circuit as an electrical signal; A sensing circuit unit including a filter unit configured to receive an electric signal amplified by the first operational amplifier and rectify and smooth the first signal, and a first control unit converting the rectified and smoothed electric signal into a first digital signal and outputting the first digital signal; ; A second control unit which receives an analog signal measured by the micrometer and converts the signal into a second digital signal and outputs a linearized data signal by comparing the first digital signal with the first digital signal; A linearization circuit unit including a zero adjuster and a span adjuster for adjusting a maximum value of the zero point; A third control unit for receiving a data signal output from the second control unit, converting the analog signal into an analog voltage signal, and outputting the second signal; An output circuit unit including a third operational amplifier for amplifying a voltage signal input from the second operational amplifier and transmitting the amplified voltage signal to an external output terminal; And a power supply circuit unit for supplying a constant voltage for driving the circuit and supplying a reference voltage to the A / D converter built in the second control unit.
여기서, 상기 감지회로부는 상기 발진회로의 출력단에 연결되어 주파수 제어신호를 생성하는 발진제어유닛을 더 포함하는 것이 바람직하며, 상기 발진제어유닛은 상기 발진파형의 주파수를 제어하여 측정감도를 조절한다.The sensing circuit unit may further include an oscillation control unit connected to an output terminal of the oscillation circuit to generate a frequency control signal, wherein the oscillation control unit controls the frequency of the oscillation waveform to adjust measurement sensitivity.
그리고, 상기 전원회로부는, 외부의 이상전압으로부터 내부 소자를 보호하는 서지흡수기와, 상기 서지흡수기와 각각 직렬 및 병렬 연결되어 노이즈를 차단하는 감쇄필터회로를 형성하는 코일 및 콘덴서를 포함할 수 있다.The power supply circuit unit may include a surge absorber that protects an internal device from an external abnormal voltage, and a coil and a capacitor which are connected in series and parallel with the surge absorber, respectively, to block a noise.
상기한 실시예에 따른 본 발명에 의하면, 인덕티브 센서의 응답속도를 5Khz 이상으로 구현하여 이와 연동하는 전송장치 및 중앙제어장치의 성능을 대폭 향상시킬 수 있는 효과가 있다. 또한, 인덕티브 센서의 인덕터와 마이크로미터에서 측정되는 두 신호를 비교하여 선형화함으로써 측정 정밀도를 대폭 향상시킬 수 있는 효과가 있다.According to the present invention according to the above embodiment, the response speed of the inductive sensor is implemented at 5Khz or more, thereby greatly improving the performance of the transmission device and the central control device interworking with it. In addition, by comparing and linearizing two signals measured at the inductor of the inductive sensor and the micrometer, the measurement accuracy can be greatly improved.
도1은 본 발명의 실시예에 따른 인덕티브 센서 회로를 도시하는 회로도이다.1 is a circuit diagram showing an inductive sensor circuit according to an embodiment 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 인덕티브 센서 회로는, 엔진의 실린더 배기밸브에 부착되는 인덕티브 센서에 적용되는 것을 전제로 하며, 상기 인덕티브 센서의 인덕터(210)와 마이크로미터(미도시)에서 측정되는 아날로그신호를 실시간으로 감지하여 상기 배기밸브의 위치신호를 출력한다.In particular, the inductive sensor circuit according to an embodiment of the present invention, on the premise that the inductive sensor is attached to the cylinder exhaust valve of the engine, the inductor 210 and the micrometer (not shown) of the inductive sensor Detects the analog signal measured in real time and outputs the position signal of the exhaust valve.
상기와 같은 인덕티브 센서 회로는, 도1에 도시된 바와 같이, 크게 감지회로부(200), 선형화회로부(400), 출력회로부(600), 및 전원회로부(800)를 포함한다.As illustrated in FIG. 1, the inductive sensor circuit as described above largely includes a sensing circuit unit 200, a linearization circuit unit 400, an output circuit unit 600, and a power circuit unit 800.
먼저, 상기 감지회로부(200)는 상기 인덕터(210)와 병렬 연결되어 발진회로를 형성하는 콘덴서(220)와, 상기 발진회로에서 생성된 발진파형을 전기신호로 입력받아 증폭시키는 제1연산증폭기(240)와, 상기 제1연산증폭기(240)에서 증폭된 전기신호를 입력받아 정류 및 평활시키는 필터부(260)와, 상기 필터부(260)에서 정류 및 평활된 전기신호를 제1디지털신호로 변환하여 출력하는 제1제어유닛(280)을 포함한다.First, the sensing circuit unit 200 is connected to the inductor 210 in parallel with the capacitor 220 to form an oscillation circuit, and the first operational amplifier for receiving and amplifying the oscillation waveform generated by the oscillation circuit as an electrical signal ( 240, a filter unit 260 for rectifying and smoothing the electric signal amplified by the first operational amplifier 240, and an electric signal rectified and smoothed at the filter unit 260 as a first digital signal. And a first control unit 280 that converts the output.
여기서, 상기 콘덴서(220)와 인덕터(210)는 LCR 병렬발진회로로 일명 탱크회로를 구성하여 발진한다. 이때의 발진주파수는
Figure PCTKR2015003269-appb-I000001
가 된다. 이 발진 파형은 상기 인덕터(210)에 근접하는 금속 물질에 의해 와전류를 발생하고 이 와전류에 의해 발진주파수의 파고가 일정하게 비 직선적으로 변하게 된다. 이 변화 값은 상기 제1연산증폭기에 전달되어 전류 증폭된 후 비교기 U2B의 +핀과 저항 R1을 통하여 비교기 U3A의 -핀에 전달된다. 이때 비교기 U2B, U3A와 플립플롭 U2, U3은 정류회로를 형성하여 고속으로 파형을 찌그러짐 없이 정류하고, 정류된 파형은 연산증폭기 U3B에 의해 평활되어 상기 제1제어유닛의 핀 CLK, Dout, CS/SHDN을 통해 후술할 선형화회로부(400)로 전송한다.Here, the condenser 220 and the inductor 210 oscillate by forming a so-called tank circuit as an LCR parallel oscillation circuit. The oscillation frequency at this time
Figure PCTKR2015003269-appb-I000001
Becomes The oscillation waveform generates an eddy current by a metal material close to the inductor 210, and the undulation of the oscillation frequency is changed non-linearly by the eddy current. The change value is transferred to the first operational amplifier and amplified by current, and then transferred to the -pin of the comparator U3A through the + pin of the comparator U2B and the resistor R1. At this time, the comparators U2B, U3A, and flip-flops U2, U3 form a rectifying circuit to rectify the waveform at high speed without distortion, and the rectified waveform is smoothed by the operational amplifier U3B to pins CLK, Dout, CS / of the first control unit. Through the SHDN is transmitted to the linearization circuit unit 400 to be described later.
한편, 상기 감지회로부(200)는 상기 발진회로의 출력단에 연결되어 주파수 제어신호를 생성하는 발진제어유닛(U1)을 더 포함할 수 있으며, 이러한 발진제어유닛(U1)은 상기 발진파형의 주파수를 제어하여 측정감도를 조절한다.Meanwhile, the sensing circuit unit 200 may further include an oscillation control unit U1 connected to an output terminal of the oscillation circuit to generate a frequency control signal. The oscillation control unit U1 may generate a frequency of the oscillation waveform. Control to adjust the measurement sensitivity.
다음으로, 상기 선형화회로부(400)는 상기 마이크로미터에서 측정된 아날로그신호를 입력받아 제2디지털신호로 변환하고 이를 기준으로 상기 제1디지털신호와 비교하여 선형화된 데이터신호를 출력하는 제2제어유닛(440)과, 상기 데이터신호의 영점을 조정하는 영점조정기(460) 및 상기 영점의 최대값을 조정하는 스판조정기(480)를 포함한다.Next, the linearization circuit unit 400 receives an analog signal measured by the micrometer and converts the analog signal into a second digital signal and compares it with the first digital signal to output a linearized data signal. 440, a zero adjuster 460 for adjusting the zero point of the data signal, and a span adjuster 480 for adjusting the maximum value of the zero point.
여기서, 상기 제2제어유닛(440)은 연산처리회로, 입출력 인터페이스, 및 메모리가 집적된 싱글칩 마이크로프로세서 형태로 구성될 수 있으며, 상기 메모리에는 선형화를 위한 알고리즘이 프로그램 형태로 저장된다. 그리고, 상기 제2제어유닛(440)과 상기 마이크로미터는 배선을 통해 직접 연결되며, 이때 상기 제2제어유닛(440)의 내부에는 A/D컨버터가 내장되어 외부 회로를 거치지 않고 즉각 신호 변환될 수 있도록 하여 처리속도가 지연되지 않게 한다. Here, the second control unit 440 may be configured in the form of a single chip microprocessor in which an operation processing circuit, an input / output interface, and a memory are integrated, and the algorithm for linearization is stored in a program form. In addition, the second control unit 440 and the micrometer are directly connected through a wire. In this case, an A / D converter is built in the second control unit 440 to immediately convert a signal without passing through an external circuit. So that the processing speed is not delayed.
한편, 상기 선형화회로부(400)에서 선형화를 위한 방법으로는, 절선 근사 방식을 프로그램으로 작성하는 방법과, 외부의 전기식 마이크로미터의 출력전압을 상기 제2제어유닛의 +AN_IN과 0Vdc_AN에 입력하고 상기 인덕터(210)와 피측정 금속 물질과의 거리를 외부 소형 모터를 사용하여 일정한 속도로 동시에 변화시키면서 상기 제2제어유닛(440)에 선형화를 자동으로 프로그램 입력하는 방법이 있다.On the other hand, as a method for linearization in the linearization circuit unit 400, a method of writing a line approximation method by a program, and inputting the output voltage of the external electric micrometer to + AN_IN and 0Vdc_AN of the second control unit and the There is a method of automatically inputting linearization to the second control unit 440 while simultaneously changing the distance between the inductor 210 and the metal material under measurement at a constant speed using an external small motor.
그리고, 상기 영점조정기(460) 및 스판조정기(480)는 가변저항으로 이루어지며, 이러한 가변저항은 사용환경이나 설계 목적에 따라 탄소피막형이나 서미트형 등 다양하게 선택이 가능하다.In addition, the zero point adjuster 460 and the span adjuster 480 are made of a variable resistor, and the variable resistor may be variously selected, such as a carbon film type or a summit type, depending on the use environment or design purpose.
다음으로, 상기 출력회로부(600)는 상기 제2제어유닛(440)에서 출력되는 데이터신호를 입력받아 아날로그 전압신호로 변환하여 출력하는 제3제어유닛(640)과, 상기 제3제어유닛(640)에서 입력되는 전압신호의 부호를 판독하여 출력하는 제2연산증폭기(660)와, 상기 제2연산증폭기(660)에서 입력되는 전압신호를 증폭시켜 외부 출력단자에 전송하는 제3연산증폭기(680)를 포함한다.Next, the output circuit unit 600 receives a data signal output from the second control unit 440, converts it into an analog voltage signal, and outputs the third control unit 640, and the third control unit 640. A second operational amplifier 660 that reads and outputs a sign of the voltage signal input from the second signal; and a third operational amplifier 680 amplifying the voltage signal input from the second operational amplifier 660 and transmitting the amplified voltage signal to an external output terminal. ).
여기서, 상기 제3제어유닛(640)에서 출력되는 전압신호는 핀 Vout을 통해 상기 제2연산증폭기(660)의 +단자에 저항 R17과 R18로 분압되어 입력된다. 상기 제2연산증폭기(660)에 입력된 전압신호는 상기 제3연산증폭기(680)의 I/V컨버터 또는 V/V증폭기 회로에 의해 출력단자 +OUTPUT과 0Vdc_OUT으로 출력되어 외부로 전송된다.Here, the voltage signal output from the third control unit 640 is divided into resistors R17 and R18 and input to the + terminal of the second operational amplifier 660 through the pin Vout. The voltage signal input to the second operational amplifier 660 is output to the output terminals + OUTPUT and 0Vdc_OUT by the I / V converter or the V / V amplifier circuit of the third operational amplifier 680 and transmitted to the outside.
다음으로, 상기 전원회로부(800)는 회로 구동을 위한 정전압을 제공하고, 상기 제2제어유닛(440)에 내장된 A/D컨버터에 기준전압을 공급한다.Next, the power circuit unit 800 provides a constant voltage for driving the circuit, and supplies a reference voltage to the A / D converter built in the second control unit 440.
여기서, 상기 전원회로부(800)는 서지흡수기(surge absorber)를 포함할 수 있으며, 이러한 서지흡수기(820)는 전원회로부(800)의 입력단에 연결되어 외부의 이상전압으로부터 내부 소자를 보호한다.Here, the power circuit unit 800 may include a surge absorber, and the surge absorber 820 is connected to the input terminal of the power circuit unit 800 to protect the internal device from an external abnormal voltage.
그리고, 상기 전원회로부(800)는 상기 서지흡수기(820)와 각각 직렬 및 병렬 연결되는 코일(L1) 및 콘덴서(C11,C12,C13)를 더 포함할 수 있으며, 이러한 코일(L1) 및 콘덴서(C11,C12,C13)는 감쇄필터회로를 형성하여 노이즈를 차단하는 역할을 한다.The power circuit unit 800 may further include coils L1 and capacitors C11, C12, and C13 connected in series and parallel with the surge absorber 820, respectively. C11, C12, and C13 form attenuation filter circuits to block noise.
한편, 상기 전원회로부(800)에서 도시된 PWM1은 정전압 공급 모듈로 안정된 전원을 내부의 능동 소자에 공급한다. U6은 정밀한 정전압 레퍼런스 IC이며 상기 제2제어유닛(440)에 내장된 A/D컨버터에 기준전압을 공급한다. On the other hand, PWM1 shown in the power circuit unit 800 is a constant voltage supply module to supply a stable power to the active element inside. U6 is a precision constant voltage reference IC and supplies a reference voltage to the A / D converter built in the second control unit 440.
지금까지 설명한 본 발명의 실시예에 따른 회로설계에 의하면, 인덕티브 센서의 응답속도를 5Khz 이상으로 구현할 수 있기 때문에 이와 연동하는 전송장치 및 중앙제어장치의 성능을 대폭 향상시킬 수 있는 효과가 있다. 또한, 인덕티브 센서의 인덕터와 마이크로미터에서 측정되는 두 신호를 비교하여 선형화함으로써 측정 정밀도를 대폭 향상시킬 수 있는 효과가 있다.According to the circuit design according to the embodiment of the present invention described above, since the response speed of the inductive sensor can be implemented at 5Khz or more, the performance of the transmission apparatus and the central control unit interworking with it can be greatly improved. In addition, by comparing and linearizing two signals measured at the inductor of the inductive sensor and the micrometer, the measurement accuracy can be greatly improved.
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 인덕티브 센서 회로에 관한 것으로서, 더욱 상세하게는 엔진의 실린더 배기밸브 위치를 실시간 감지하여 전송하는 인덕티브 센서 회로 분야에 이용가능하다.The present invention relates to an inductive sensor circuit, and more particularly, it can be used in the field of inductive sensor circuit for real-time detection and transmission of the cylinder exhaust valve position of the engine.

Claims (4)

  1. 엔진의 실린더 배기밸브에 부착되는 인덕티브 센서에 적용되는 것으로, 상기 인덕티브 센서의 인덕터와 마이크로미터에서 측정되는 아날로그신호를 실시간 감지하여 상기 배기밸브의 위치신호를 출력하는 인덕티브 센서 회로에 있어서,In the inductive sensor attached to the cylinder exhaust valve of the engine, the inductive sensor circuit for detecting the analog signal measured in the inductor and the micrometer of the inductive sensor in real time to output the position signal of the exhaust valve,
    상기 인덕터와 병렬 연결되어 발진회로를 형성하는 콘덴서와, 상기 발진회로에서 생성된 발진파형을 전기신호로 입력받아 증폭시키는 제1연산증폭기와, 상기 제1연산증폭기에서 증폭된 전기신호를 입력받아 정류 및 평활시키는 필터부와, 상기 필터부에서 정류 및 평활된 전기신호를 제1디지털신호로 변환하여 출력하는 제1제어유닛을 포함하는 감지회로부;A capacitor connected in parallel with the inductor to form an oscillation circuit, a first operational amplifier configured to receive and amplify an oscillation waveform generated by the oscillation circuit as an electric signal, and receive and rectify an electrical signal amplified by the first operational amplifier And a sensing circuit unit including a smoothing filter unit and a first control unit converting the electric signal rectified and smoothed by the filter unit into a first digital signal and outputting the first digital signal.
    상기 마이크로미터에서 측정된 아날로그신호를 입력받아 제2디지털신호로 변환하고 이를 기준으로 상기 제1디지털신호와 비교하여 선형화된 데이터신호를 출력하는 제2제어유닛과, 상기 데이터신호의 영점을 조정하는 영점조정기 및 상기 영점의 최대값을 조정하는 스판조정기를 포함하는 선형화회로부;A second control unit which receives an analog signal measured by the micrometer and converts the signal into a second digital signal and outputs a linearized data signal by comparing the first digital signal with the first digital signal; A linearization circuit unit including a zero adjuster and a span adjuster for adjusting a maximum value of the zero point;
    상기 제2제어유닛에서 출력되는 데이터신호를 입력받아 아날로그 전압신호로 변환하여 출력하는 제3제어유닛과, 상기 제3제어유닛에서 입력되는 전압신호의 부호를 판독하여 출력하는 제2연산증폭기와, 상기 제2연산증폭기에서 입력되는 전압신호를 증폭시켜 외부 출력단자에 전송하는 제3연산증폭기를 포함하는 출력회로부; 및A third control unit for receiving a data signal output from the second control unit, converting the analog signal into an analog voltage signal, and outputting the second signal; An output circuit unit including a third operational amplifier for amplifying a voltage signal input from the second operational amplifier and transmitting the amplified voltage signal to an external output terminal; And
    회로 구동을 위한 정전압을 제공하고, 상기 제2제어유닛에 내장된 A/D컨버터에 기준전압을 공급하는 전원회로부;A power supply circuit unit for supplying a constant voltage for driving the circuit and supplying a reference voltage to the A / D converter embedded in the second control unit;
    를 포함하는 것을 특징으로 하는 인덕티브 센서 회로.Inductive sensor circuit comprising a.
  2. 제1항에 있어서,The method of claim 1,
    상기 감지회로부는 상기 발진회로의 출력단에 연결되어 주파수 제어신호를 생성하는 발진제어유닛을 더 포함하며,The sensing circuit unit further includes an oscillation control unit connected to the output terminal of the oscillation circuit to generate a frequency control signal,
    상기 발진제어유닛은 상기 발진파형의 주파수를 제어하여 측정감도를 조절하는 것을 특징으로 하는 인덕티브 센서 회로.And the oscillation control unit controls the frequency of the oscillation waveform to adjust the measurement sensitivity.
  3. 제1항에 있어서,The method of claim 1,
    상기 전원회로부는, 전원 입력단에 연결되어 외부의 이상전압으로부터 내부 소자를 보호하는 서지흡수기를 포함하는 것을 특징으로 하는 인덕티브 센서 회로.The power circuit part, the inductive sensor circuit is characterized in that it comprises a surge absorber connected to the power input terminal to protect the internal element from the external abnormal voltage.
  4. 제3항에 있어서,The method of claim 3,
    상기 전원회로부는, 상기 서지흡수기와 각각 직렬 및 병렬 연결되어 노이즈를 차단하는 감쇄필터회로를 형성하는 코일 및 콘덴서를 더 포함하는 것을 특징으로 하는 인덕티브 센서 회로.The power supply circuit unit, the inductive sensor circuit further comprises a coil and a capacitor connected to the surge absorber in series and in parallel to form a damping filter circuit to block noise.
PCT/KR2015/003269 2014-04-02 2015-04-02 Inductive sensor circuit WO2015152641A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112665499A (en) * 2020-12-03 2021-04-16 珠海格力电器股份有限公司 Position detection device and method of inductive height sensor and automobile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190036959A (en) 2017-09-28 2019-04-05 금오기전 주식회사 Apparatus and Method for Linearizing Sensor Output in Sensor Data Processing System

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010029864A (en) * 1999-06-30 2001-04-16 니시무로 타이죠 Voltage controlled oscillating circuit
JP2003156304A (en) * 2001-11-22 2003-05-30 Ribekkusu:Kk Position detector in fluid pressure cylinder
KR20110019016A (en) * 2009-08-19 2011-02-25 이윤희 Zero point and span compensationg apparatus
KR20110030092A (en) * 2009-09-17 2011-03-23 주식회사 세나코 Position transducer and device method of the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4232726B2 (en) * 2004-10-18 2009-03-04 株式会社デンソー Rotation detector
US20070216324A1 (en) * 2006-03-17 2007-09-20 Hiwin Mikrosystem Corp. Demodulation method of resolver output position signal
CN101504441B (en) * 2008-12-31 2011-11-30 人民电器集团有限公司 Intelligent high-voltage switchgear assembly detection apparatus
US9366547B2 (en) * 2009-12-07 2016-06-14 Ams Ag Sensor arrangement and method for operating a sensor arrangement
CN203323775U (en) * 2013-07-05 2013-12-04 科瑞(苏州工业园区)工业电子有限公司 Application specific integrated circuit (ASIC)-based inductance sensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010029864A (en) * 1999-06-30 2001-04-16 니시무로 타이죠 Voltage controlled oscillating circuit
JP2003156304A (en) * 2001-11-22 2003-05-30 Ribekkusu:Kk Position detector in fluid pressure cylinder
KR20110019016A (en) * 2009-08-19 2011-02-25 이윤희 Zero point and span compensationg apparatus
KR20110030092A (en) * 2009-09-17 2011-03-23 주식회사 세나코 Position transducer and device method of the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112665499A (en) * 2020-12-03 2021-04-16 珠海格力电器股份有限公司 Position detection device and method of inductive height sensor and automobile
CN112665499B (en) * 2020-12-03 2022-08-23 珠海格力电器股份有限公司 Position detection device and method of inductive height sensor and automobile

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