JPS57186102A - Detector for rotational angle - Google Patents

Detector for rotational angle

Info

Publication number
JPS57186102A
JPS57186102A JP7183881A JP7183881A JPS57186102A JP S57186102 A JPS57186102 A JP S57186102A JP 7183881 A JP7183881 A JP 7183881A JP 7183881 A JP7183881 A JP 7183881A JP S57186102 A JPS57186102 A JP S57186102A
Authority
JP
Japan
Prior art keywords
magnetic pickup
frequency
signal
output
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7183881A
Other languages
Japanese (ja)
Inventor
Masayuki Ikeuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7183881A priority Critical patent/JPS57186102A/en
Publication of JPS57186102A publication Critical patent/JPS57186102A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/24471—Error correction
    • G01D5/24476—Signal processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To prevent malfunction due to noise by obtaining only an original signal by passing the output of a sensor, which generates the signal synchronously with the rotation of a crank shaft, through a filter which varies in passing band in accordance with the rotational frequency. CONSTITUTION:The frequency of the output signal of the 1st magnetic pickup 1 is much higher than that of the 2nd magnetic pickup 3. The output terminal of the 1st magnetic pickup 1 is connected to the input terminal of the 1st waveform shaping circuit 2 through a filter 6. The output terminal of the 2nd magnetic pickup 3 is connected to the 2nd waveform shaping circuit 4. A rotation detecting circuit 5 extracts a voltage, which corresponds to a rotational frequency, from the output signal of the 2nd magnetic pickup 3. Then, the cutoff frequency of a high-pass filter 6 is set a little bit lower than the frequency of the signal generated by the 1st magnetic pickup 1, thereby suppressing pulsation due to a noise having a lower frequency than an original signal has.
JP7183881A 1981-05-11 1981-05-11 Detector for rotational angle Pending JPS57186102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7183881A JPS57186102A (en) 1981-05-11 1981-05-11 Detector for rotational angle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7183881A JPS57186102A (en) 1981-05-11 1981-05-11 Detector for rotational angle

Publications (1)

Publication Number Publication Date
JPS57186102A true JPS57186102A (en) 1982-11-16

Family

ID=13472075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7183881A Pending JPS57186102A (en) 1981-05-11 1981-05-11 Detector for rotational angle

Country Status (1)

Country Link
JP (1) JPS57186102A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60231111A (en) * 1984-04-28 1985-11-16 Fujitsu Ten Ltd Signal processing circuit of magnetic detection type rotary angle detecting sensor
JPS6179213U (en) * 1984-10-30 1986-05-27
US4989574A (en) * 1988-09-27 1991-02-05 Fuji Jukogyo Kabushiki Kaisha Electromagnetic pickup
US5107210A (en) * 1989-12-29 1992-04-21 Ebara Corporation Displacement sensing circuit with coil and band pass filter for attenuating external interference

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60231111A (en) * 1984-04-28 1985-11-16 Fujitsu Ten Ltd Signal processing circuit of magnetic detection type rotary angle detecting sensor
JPS6179213U (en) * 1984-10-30 1986-05-27
US4989574A (en) * 1988-09-27 1991-02-05 Fuji Jukogyo Kabushiki Kaisha Electromagnetic pickup
US5107210A (en) * 1989-12-29 1992-04-21 Ebara Corporation Displacement sensing circuit with coil and band pass filter for attenuating external interference

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