JPS57186102A - Detector for rotational angle - Google Patents
Detector for rotational angleInfo
- 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
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.
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)
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 |
-
1981
- 1981-05-11 JP JP7183881A patent/JPS57186102A/en active Pending
Cited By (4)
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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