JPS5456469A - Minute gap measuring instrument - Google Patents
Minute gap measuring instrumentInfo
- Publication number
- JPS5456469A JPS5456469A JP12253177A JP12253177A JPS5456469A JP S5456469 A JPS5456469 A JP S5456469A JP 12253177 A JP12253177 A JP 12253177A JP 12253177 A JP12253177 A JP 12253177A JP S5456469 A JPS5456469 A JP S5456469A
- Authority
- JP
- Japan
- Prior art keywords
- oscillators
- gap
- oscillator
- objects
- period
- 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
Abstract
PURPOSE: To measure the gap between two objects by making the electrostatic capacity of a pair of electrodes mounted on the opposing faces of two objects parallel with one of two oscillators of the same frequency and measuring the signal period of the differential frequencies of both oscillators.
CONSTITUTION: The electrostatic capacity 1 of the electrodes opposed to the two objects to be measured of gap is connected in parallel with the LC oscillator 2 of a capacity C and the outputs of the two oscillators, i.e., said oscillator and a local oscillator 4 for conversion of the same frequency as that of the oscillator 2 alone are applied to a modulator 3. When the differential frequency (f) of both oscillators is drawn from a low-pass filter 5, is amplified in an amplifier 6 and the period is counted with a period counter 7, then the numerical value proportional to the gap is obtained. Hence, the figure of the gap may be directly read from a proportional conversion unit 8
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12253177A JPS5456469A (en) | 1977-10-14 | 1977-10-14 | Minute gap measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12253177A JPS5456469A (en) | 1977-10-14 | 1977-10-14 | Minute gap measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5456469A true JPS5456469A (en) | 1979-05-07 |
Family
ID=14838150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12253177A Pending JPS5456469A (en) | 1977-10-14 | 1977-10-14 | Minute gap measuring instrument |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5456469A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS477672A (en) * | 1970-09-29 | 1972-04-24 | Westinghouse Electric Corp | Electrical disconnector |
-
1977
- 1977-10-14 JP JP12253177A patent/JPS5456469A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS477672A (en) * | 1970-09-29 | 1972-04-24 | Westinghouse Electric Corp | Electrical disconnector |
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