JPS576366A - Apparatur for detecting frequency - Google Patents
Apparatur for detecting frequencyInfo
- Publication number
- JPS576366A JPS576366A JP8037680A JP8037680A JPS576366A JP S576366 A JPS576366 A JP S576366A JP 8037680 A JP8037680 A JP 8037680A JP 8037680 A JP8037680 A JP 8037680A JP S576366 A JPS576366 A JP S576366A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- deviation
- cycle
- action speed
- value
- 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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
PURPOSE:To make an ideal protective characteristic approximate to an antitiming characteristic by only one frequency relay, by using the integral quantity of deviation value between reference frequency and system frequency of input as an element for determination of action speed. CONSTITUTION:A zero cross point of voltage input of a system introduced from a transformer 16, is detected by a detecting circuit 17 and an interval of the zero cross point generating at every half cycle or one cycle, is counted by a counting circuit 18. On occasion of lowering the frequency of the input voltage below a constant frequency, the set value of deviation in accordance with the deviation value of reference frequency at every half cycle or one cycle is added by a integrator 22 and the last output is put out by a level detector 23 when said integrated quantity becomes larger than a constant value. Hereby, a rapid action speed is obtained because the more the deviation quantity is large, the more the addition quantity becomes large and conversely, a slow action speed is obtained when the variation rate of frequency is small.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8037680A JPS576366A (en) | 1980-06-12 | 1980-06-12 | Apparatur for detecting frequency |
JP1985058024U JPS60181679U (en) | 1980-06-12 | 1985-04-17 | frequency detection device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8037680A JPS576366A (en) | 1980-06-12 | 1980-06-12 | Apparatur for detecting frequency |
JP1985058024U JPS60181679U (en) | 1980-06-12 | 1985-04-17 | frequency detection device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS576366A true JPS576366A (en) | 1982-01-13 |
Family
ID=59690191
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8037680A Pending JPS576366A (en) | 1980-06-12 | 1980-06-12 | Apparatur for detecting frequency |
JP1985058024U Pending JPS60181679U (en) | 1980-06-12 | 1985-04-17 | frequency detection device |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1985058024U Pending JPS60181679U (en) | 1980-06-12 | 1985-04-17 | frequency detection device |
Country Status (1)
Country | Link |
---|---|
JP (2) | JPS576366A (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5141421B2 (en) * | 1971-09-22 | 1976-11-10 | ||
DE2623494A1 (en) * | 1976-05-26 | 1977-12-15 | Bosch Gmbh Robert | ARRANGEMENT FOR CONTINUOUS MEASUREMENT OF THE PULSE REQUEST RATE |
-
1980
- 1980-06-12 JP JP8037680A patent/JPS576366A/en active Pending
-
1985
- 1985-04-17 JP JP1985058024U patent/JPS60181679U/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS60181679U (en) | 1985-12-02 |
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