JPS5690212A - Digital conversion device - Google Patents
Digital conversion deviceInfo
- Publication number
- JPS5690212A JPS5690212A JP17156879A JP17156879A JPS5690212A JP S5690212 A JPS5690212 A JP S5690212A JP 17156879 A JP17156879 A JP 17156879A JP 17156879 A JP17156879 A JP 17156879A JP S5690212 A JPS5690212 A JP S5690212A
- Authority
- JP
- Japan
- Prior art keywords
- displacement
- differential
- capacities
- oscillation
- equal
- 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
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE: To improve stability and reduce cost by easing an adverse effect due to various changes with the assistance of a sensor constituted in a differential form and a circuit operating in a differential manner and converting a mechanical displacement directly to a digital signal.
CONSTITUTION: A differential-type electrostatic capacity displacement sensor which has the first electrostatic capacity 11 increased by a displacement on a displacement part on one hand and the second electrostatic capacity 12 reduced on the other hand, is provided. Then a reset signal from a terminal 24 is to reset so that the both electrostatic capacities 11, 12 may be equal when the displacement is at a zero level. Consequently, the oscillation frequencies of oscillation circuits 13, 14 whose oscillation frequency is set by electromagnetic capacities 11, 12 are equal and the output frequecies of the frequency dividing circuits 15, 16 are also equal. A differential signal corresponding to a differential in period of the frequencies of the first and second oscillation circuits 13, 14 which change according to a displacement on the displacement part is sought in a suitable manner to a differential in period of the frequency dividing capacities of the frequency dividing circuits 15, 16. Following this procedure, a displacement value is converted to a digital signal and it is output in response to the differential signal.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17156879A JPS5690212A (en) | 1979-12-22 | 1979-12-22 | Digital conversion device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17156879A JPS5690212A (en) | 1979-12-22 | 1979-12-22 | Digital conversion device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5690212A true JPS5690212A (en) | 1981-07-22 |
Family
ID=15925548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17156879A Pending JPS5690212A (en) | 1979-12-22 | 1979-12-22 | Digital conversion device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5690212A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59142418A (en) * | 1983-02-02 | 1984-08-15 | Matsushita Electric Ind Co Ltd | Physical quantity detecting device |
JPH01277717A (en) * | 1988-04-18 | 1989-11-08 | Schutz Im & Exporthandl Bv | Capacity displacement meter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS533360A (en) * | 1976-06-30 | 1978-01-13 | Yokogawa Hokushin Electric Corp | Displacement converter |
-
1979
- 1979-12-22 JP JP17156879A patent/JPS5690212A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS533360A (en) * | 1976-06-30 | 1978-01-13 | Yokogawa Hokushin Electric Corp | Displacement converter |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59142418A (en) * | 1983-02-02 | 1984-08-15 | Matsushita Electric Ind Co Ltd | Physical quantity detecting device |
JPH01277717A (en) * | 1988-04-18 | 1989-11-08 | Schutz Im & Exporthandl Bv | Capacity displacement meter |
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