JPS56142462A - Centrifugal machine overspeeding detecting device - Google Patents
Centrifugal machine overspeeding detecting deviceInfo
- Publication number
- JPS56142462A JPS56142462A JP4660880A JP4660880A JPS56142462A JP S56142462 A JPS56142462 A JP S56142462A JP 4660880 A JP4660880 A JP 4660880A JP 4660880 A JP4660880 A JP 4660880A JP S56142462 A JPS56142462 A JP S56142462A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- overspeeding
- signal
- reference frequency
- centrifugal machine
- 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
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/07—Indicating devices, e.g. for remote indication
- G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
- G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
- G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
Abstract
PURPOSE:To detect an overspeeding with accuracy, in a rotor excessive speeding detecting device for a centrifugal machine, etc., by comparing a rotating signal with a reference frequency signal which is switched being linked with change-over of rotor's r.p.m. CONSTITUTION:When a rotor 1 of a centrifugal machine, etc. rotates, a rotating signal of a frequency which corresponds to the rotation is obtained by an optical adapter 2 and a rotation detector 9. On the other hand, emission signals of oscillators 10 and 11 which emit respectively different reference frequency signals are compared with the aforementioned signal by a frequency comparator 13, and in case if the rotor's r.p.m. proved to be larger than frequency of the reference frequency signal, it is determined to be an overspeeding and the rotor is decelerated by a control circuit 14. 12 is a switch for changing outputs of the oscillators 10 and 11, and since this switch is linked with a speed setting dial of the rotor and it is so designed that a reference frequency signal corresponding to the maximum tolerable r.p.m. of the rotor is put into the comparator, it is possible to detect an overspeeding with accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4660880A JPS56142462A (en) | 1980-04-08 | 1980-04-08 | Centrifugal machine overspeeding detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4660880A JPS56142462A (en) | 1980-04-08 | 1980-04-08 | Centrifugal machine overspeeding detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56142462A true JPS56142462A (en) | 1981-11-06 |
Family
ID=12752011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4660880A Pending JPS56142462A (en) | 1980-04-08 | 1980-04-08 | Centrifugal machine overspeeding detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56142462A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116662A (en) * | 1984-11-12 | 1986-06-04 | Fuji Kuki Kk | Air motor apparatus |
-
1980
- 1980-04-08 JP JP4660880A patent/JPS56142462A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116662A (en) * | 1984-11-12 | 1986-06-04 | Fuji Kuki Kk | Air motor apparatus |
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