JPS55149059A - Rotational frequency detector - Google Patents
Rotational frequency detectorInfo
- Publication number
- JPS55149059A JPS55149059A JP5846979A JP5846979A JPS55149059A JP S55149059 A JPS55149059 A JP S55149059A JP 5846979 A JP5846979 A JP 5846979A JP 5846979 A JP5846979 A JP 5846979A JP S55149059 A JPS55149059 A JP S55149059A
- Authority
- JP
- Japan
- Prior art keywords
- output
- rotating magnet
- pulse
- power source
- electric power
- 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
- Control Of Electric Motors In General (AREA)
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
Abstract
PURPOSE: To enable the obtaining of stable output despite microfluctuations of a rotating magnet by so constituting the circuits of the noncontact type rotational frequency detector which makes use of a magnetosensitive element or the like as to have hysteresis characteristics through intermittent supplying of an electric power source.
CONSTITUTION: In a signal detector 8 consists of a magnetosensitive element 1 which converts the change in the magnetic line of force of a rotating magnet 100 to electric signal and an output circuit 11, the symmetrical electric signals Q1, Q2 are formed along with the rotation of the rotating magnet 100. These signals Q1, Q2 are applied respectively to the noninversion input terminal (+) and inversion input terminal (-) of a comparator 3f and are compared at the intermitted application of DC voltage between terminals 5, 6. An output pulse synchronized with the electric power source pulse is generated in the output of this comparator 3f when the electric signal Q1 is higher than the same Q2. When this output pulse is generated, constant voltage is superposed on the electric signal Q1 only for the sepcified time exceeding said pulse after generation of each output pulse. Since in this way the circuit is so formed as to have hysteresis characteristic through intermittent supplying of electric power source, the stable output despite the microfluctuations of the rotating magnet 100 may be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5846979A JPS55149059A (en) | 1979-05-10 | 1979-05-10 | Rotational frequency detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5846979A JPS55149059A (en) | 1979-05-10 | 1979-05-10 | Rotational frequency detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55149059A true JPS55149059A (en) | 1980-11-20 |
Family
ID=13085284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5846979A Pending JPS55149059A (en) | 1979-05-10 | 1979-05-10 | Rotational frequency detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55149059A (en) |
-
1979
- 1979-05-10 JP JP5846979A patent/JPS55149059A/en active Pending
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