GB1483344A - Pressure sensitive devices - Google Patents
Pressure sensitive devicesInfo
- Publication number
- GB1483344A GB1483344A GB5254773A GB5254773A GB1483344A GB 1483344 A GB1483344 A GB 1483344A GB 5254773 A GB5254773 A GB 5254773A GB 5254773 A GB5254773 A GB 5254773A GB 1483344 A GB1483344 A GB 1483344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- acoustic
- transducers
- sensed
- wave
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
- G01L9/0008—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations
- G01L9/0022—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a piezoelectric element
- G01L9/0025—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a piezoelectric element with acoustic surface waves
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1483344 Pressure sensing MARCONI CO Ltd 5 Aug 1974 [13 Nov 1973] 52547/73 Heading GIG [Also in Division H3] A pressure sensor comprises a sending and a receiving transducer on a body of Piezo-electric acoustic-wave propagating medium, the body being deformable by the pressure to be sensed so as to vary the wave propagation time between the transducers. In the Fig. 2 embodiment a chamber in which a fluid-pressure P is to be sensed is defined by quartz crystal 10, plate 14 and peripheral seal 16. An acoustic surface wave is propagated between transducers 18, 20 which are connected in the feedback loop of an amplifier to form an oscillator whose frequency depends on the acoustic path length, hence on deformation of crystal 10. Each electrode is of inter-digitated form.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5254773A GB1483344A (en) | 1974-08-05 | 1974-08-05 | Pressure sensitive devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5254773A GB1483344A (en) | 1974-08-05 | 1974-08-05 | Pressure sensitive devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1483344A true GB1483344A (en) | 1977-08-17 |
Family
ID=10464327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5254773A Expired GB1483344A (en) | 1974-08-05 | 1974-08-05 | Pressure sensitive devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1483344A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0015836A1 (en) * | 1979-03-09 | 1980-09-17 | Thomson-Csf | Surface acoustic wave pressure transducer |
US4229979A (en) * | 1978-05-30 | 1980-10-28 | International Standard Electric Corporation | Transducer and method of making the same |
EP0018248A1 (en) * | 1979-04-18 | 1980-10-29 | Thomson-Csf | Surface acoustic wave pressure sensor, its use in the ignition system of an internal-combustion engine and in a flowmeter |
GB2235533A (en) * | 1989-08-11 | 1991-03-06 | Stc Plc | Piezoelectric sensor device |
-
1974
- 1974-08-05 GB GB5254773A patent/GB1483344A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4229979A (en) * | 1978-05-30 | 1980-10-28 | International Standard Electric Corporation | Transducer and method of making the same |
EP0015836A1 (en) * | 1979-03-09 | 1980-09-17 | Thomson-Csf | Surface acoustic wave pressure transducer |
FR2451026A1 (en) * | 1979-03-09 | 1980-10-03 | Thomson Csf | SURFACE ELASTIC WAVE PRESSURE SENSOR |
EP0018248A1 (en) * | 1979-04-18 | 1980-10-29 | Thomson-Csf | Surface acoustic wave pressure sensor, its use in the ignition system of an internal-combustion engine and in a flowmeter |
FR2454616A1 (en) * | 1979-04-18 | 1980-11-14 | Thomson Csf | SURFACE ELASTIC WAVE PRESSURE SENSOR AND IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE USING THE SAME |
GB2235533A (en) * | 1989-08-11 | 1991-03-06 | Stc Plc | Piezoelectric sensor device |
GB2235533B (en) * | 1989-08-11 | 1994-02-09 | Stc Plc | Piezoelectric sensor device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |