JPS5636002A - Fine displacement detector - Google Patents
Fine displacement detectorInfo
- Publication number
- JPS5636002A JPS5636002A JP11151979A JP11151979A JPS5636002A JP S5636002 A JPS5636002 A JP S5636002A JP 11151979 A JP11151979 A JP 11151979A JP 11151979 A JP11151979 A JP 11151979A JP S5636002 A JPS5636002 A JP S5636002A
- Authority
- JP
- Japan
- Prior art keywords
- pair
- oscillators
- outputs
- subject
- differentially
- 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
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
PURPOSE: To obtain an accurate measurement output by providing a pair of variable capacitors differentially responding to mechanical displacement of a subject provided in combination with a pair of qualtz oscillators.
CONSTITUTION: A pair of fixed electrodes Ef1 and Ef2 are provided and a movable electrode Ev is connected to the subject placed between the electrodes. A pair of variable condensers C1 and C2 differentially responding to mechanical displacement of the subject are connected to a pair of qualtz oscillators Xtal1 and Xtal2 to form two outputs both differentially varying in the frequency. A pair of mixers MIX1 and MIX2 are provided to form a locally emitted frequency signal for each of the two outputs from the oscillators, and the outputs thereof are converted with a pair of converters FV1 and FV2, the output of which is detected in the difference by a circuit DEF.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11151979A JPS5636002A (en) | 1979-08-31 | 1979-08-31 | Fine displacement detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11151979A JPS5636002A (en) | 1979-08-31 | 1979-08-31 | Fine displacement detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5636002A true JPS5636002A (en) | 1981-04-09 |
Family
ID=14563373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11151979A Pending JPS5636002A (en) | 1979-08-31 | 1979-08-31 | Fine displacement detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5636002A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004076967A1 (en) * | 2003-02-28 | 2004-09-10 | Oht Inc. | Conductor position inspecting device and conductor position inspecting method |
WO2004076966A1 (en) * | 2003-02-28 | 2004-09-10 | Oht Inc. | Conductor inspecting device and conductor inspecting method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3109297A (en) * | 1961-09-20 | 1963-11-05 | Gen Electric | Rotary compressor injection cooling arrangement |
JPS5187808A (en) * | 1975-01-27 | 1976-07-31 | Lennox Ind Inc | |
JPS5569372A (en) * | 1978-11-20 | 1980-05-24 | Goro Shimada | Gas reducing valve combined with earthquake-proof automatic shut-off mechanism |
-
1979
- 1979-08-31 JP JP11151979A patent/JPS5636002A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3109297A (en) * | 1961-09-20 | 1963-11-05 | Gen Electric | Rotary compressor injection cooling arrangement |
JPS5187808A (en) * | 1975-01-27 | 1976-07-31 | Lennox Ind Inc | |
JPS5569372A (en) * | 1978-11-20 | 1980-05-24 | Goro Shimada | Gas reducing valve combined with earthquake-proof automatic shut-off mechanism |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004076967A1 (en) * | 2003-02-28 | 2004-09-10 | Oht Inc. | Conductor position inspecting device and conductor position inspecting method |
WO2004076966A1 (en) * | 2003-02-28 | 2004-09-10 | Oht Inc. | Conductor inspecting device and conductor inspecting method |
US7332914B2 (en) | 2003-02-28 | 2008-02-19 | Oht Inc. | Conductor inspection apparatus and conductor inspection method |
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