GB1286987A - A method of compensating the pyroelectric effect in electromechanical transducers, particularly in ferroelectrics, and an arrangement for performing the same - Google Patents
A method of compensating the pyroelectric effect in electromechanical transducers, particularly in ferroelectrics, and an arrangement for performing the sameInfo
- Publication number
- GB1286987A GB1286987A GB4885369A GB4885369A GB1286987A GB 1286987 A GB1286987 A GB 1286987A GB 4885369 A GB4885369 A GB 4885369A GB 4885369 A GB4885369 A GB 4885369A GB 1286987 A GB1286987 A GB 1286987A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electric
- electrodes
- pyro
- piezo
- arrangement
- 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
Landscapes
- Radiation Pyrometers (AREA)
Abstract
1286987 Piezo-electric elements METRAMESSUND FREQUENZTECHNIK RICHARD WEBER KG 4 Oct 1969 48853/69 Heading H1E The pyro-electric effect in electromechanical transducers employing the longitudinal, transverse, or shear, piezo-electric effect is compensated by the use of two pairs of electrodes, the pairs being of such relative disposition and area, and so interconnected, as to ensure the mutual cancellation of the changes of surface charge arising at the electrodes due to the pyro-electric effect upon a change of temperature. In the arrangement of Fig. 4, the electrode areas or pyro-electric coefficients of the two plates 6 and 7 are chosen such that, when connected as shown, cancellation of the pyroelectric surface charges occurs, the mechanical force for application to the transducer being arranged to apply tensile stress to one plate and compressive stress to the other, in order to prevent cancellation of the signal which results from mechanical strain. For the shear loaded piezo-electric element of Fig. 6, pyro-electric charges appearing at the principal electrodes 4 and 5 due to the polarization vector not being strictly parallel to those faces are compensated by the pair of electrodes 8 and 9 (electrode 8, only, appears inFig. 6) which are connected to the principal electrodes. The arrangement facilitates the use as transducers of ceramic ferro-electric materials, which are pyre-electric.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4885369A GB1286987A (en) | 1969-10-04 | 1969-10-04 | A method of compensating the pyroelectric effect in electromechanical transducers, particularly in ferroelectrics, and an arrangement for performing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4885369A GB1286987A (en) | 1969-10-04 | 1969-10-04 | A method of compensating the pyroelectric effect in electromechanical transducers, particularly in ferroelectrics, and an arrangement for performing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1286987A true GB1286987A (en) | 1972-08-31 |
Family
ID=10450160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4885369A Expired GB1286987A (en) | 1969-10-04 | 1969-10-04 | A method of compensating the pyroelectric effect in electromechanical transducers, particularly in ferroelectrics, and an arrangement for performing the same |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1286987A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107110886A (en) * | 2014-12-11 | 2017-08-29 | 布鲁尔及凯尔声音及振动测量公司 | Piezoelectric sensor element for shear mode accelerometer |
-
1969
- 1969-10-04 GB GB4885369A patent/GB1286987A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107110886A (en) * | 2014-12-11 | 2017-08-29 | 布鲁尔及凯尔声音及振动测量公司 | Piezoelectric sensor element for shear mode accelerometer |
US20170343578A1 (en) * | 2014-12-11 | 2017-11-30 | Brüel & Kjær Sound & Vibration Measurement A/S | Piezoelectric sensor element for a shear mode accelerometer |
EP3230749B1 (en) * | 2014-12-11 | 2019-06-19 | Brüel & Kjaer Sound & Vibration Measurement A/S | Piezoelectric sensor element for a shear mode accelerometer |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PLNP | Patent lapsed through nonpayment of renewal fees |