JPS64412A - Movement detector - Google Patents
Movement detectorInfo
- Publication number
- JPS64412A JPS64412A JP15580187A JP15580187A JPS64412A JP S64412 A JPS64412 A JP S64412A JP 15580187 A JP15580187 A JP 15580187A JP 15580187 A JP15580187 A JP 15580187A JP S64412 A JPS64412 A JP S64412A
- Authority
- JP
- Japan
- Prior art keywords
- elements
- comparator
- input terminal
- power supply
- blind zone
- 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
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE: To detect the moving direction and speed of a moving object by a 1-phase signal by connecting a comparator having a blind zone of a prescribed level and series-connected magneto-resistance elements (MR) elements on which a prescribed voltage is impressed.
CONSTITUTION: The MR elements 1, 2 are connected in series between a power supply Vc and a ground point and the non-inverted input terminal of the comparator 3 is connected to the connection point (a) of the elements 1, 2. The inverted input terminal thereof is connected to a reference power supply 4. The comparator 3 makes a comparison operation only when the difference between the two input terminal potentials exceeds the prescribed blind zone. The comparator maintains the previous state while the difference exists in the blind zone. The voltage value Vs of the power supply 4 is equal to the voltage Va at the midpoint (a) of the case in which the elements 1, 2 do not receive the external magnetic field. The resistance values of the elements 1, 2 change when a magnet 7 which is mounted on the rotating body and generates the magnetic field orthogonal with the longitudinal direction of the elements 1, 2 passes near the elements 1, 2. The output signal S0 of the comparator 3 is then made into H or L by the difference between the voltages Va and Vs. The rotating speed of the rotating body is, therefore, detectable from the number of pulses of the S0 and the rotating direction is detectable from the duty ratio.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15580187A JPS64412A (en) | 1987-06-23 | 1987-06-23 | Movement detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15580187A JPS64412A (en) | 1987-06-23 | 1987-06-23 | Movement detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01412A JPH01412A (en) | 1989-01-05 |
JPS64412A true JPS64412A (en) | 1989-01-05 |
Family
ID=15613744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15580187A Pending JPS64412A (en) | 1987-06-23 | 1987-06-23 | Movement detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS64412A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019082295A1 (en) * | 2017-10-25 | 2019-05-02 | 理化工業株式会社 | Temperature control device |
-
1987
- 1987-06-23 JP JP15580187A patent/JPS64412A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019082295A1 (en) * | 2017-10-25 | 2019-05-02 | 理化工業株式会社 | Temperature control device |
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