JPS5733365A - Phase meter - Google Patents
Phase meterInfo
- Publication number
- JPS5733365A JPS5733365A JP10750980A JP10750980A JPS5733365A JP S5733365 A JPS5733365 A JP S5733365A JP 10750980 A JP10750980 A JP 10750980A JP 10750980 A JP10750980 A JP 10750980A JP S5733365 A JPS5733365 A JP S5733365A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- zero cross
- phase difference
- time
- time lag
- 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
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R25/08—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents by counting of standard pulses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Phase Differences (AREA)
Abstract
PURPOSE:To measure a phase difference with virtually no time lag by using a circuit which digitally measures zero cross time difference at every cycle, and outputs the same after subjecting to the digital to analog conversion. CONSTITUTION:Period signals e1, e2 having the two same frequencies are applied respectively to a zero cross circuit 1 and an FF2, and the square wave e5 having the pulse width proportional to a zero cross time difference is formed. This is applied to a modulated wave generating circuit consisting of an AND gate 4 and a clock generating circuit 7, whereby a signal e8 is obtained. Next, a microprocessor 8 supplied with the signal e8 operates phase differences based on modulation quantity. It is next converted 9 from digital to analog to form a staircaselike signal e10 which is outputted. In this way, the phase difference between the period signals e1, e2 is outputted with a time lag of only the processing time TD. Hence, the phase difference is measured with virtually no time lag.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10750980A JPS5733365A (en) | 1980-08-05 | 1980-08-05 | Phase meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10750980A JPS5733365A (en) | 1980-08-05 | 1980-08-05 | Phase meter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5733365A true JPS5733365A (en) | 1982-02-23 |
Family
ID=14461003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10750980A Pending JPS5733365A (en) | 1980-08-05 | 1980-08-05 | Phase meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5733365A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111722011A (en) * | 2019-03-20 | 2020-09-29 | 阿自倍尔株式会社 | Frequency detection circuit |
-
1980
- 1980-08-05 JP JP10750980A patent/JPS5733365A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111722011A (en) * | 2019-03-20 | 2020-09-29 | 阿自倍尔株式会社 | Frequency detection circuit |
CN111722011B (en) * | 2019-03-20 | 2023-01-24 | 阿自倍尔株式会社 | Frequency detection circuit |
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