CN1862262A - Differential piezoelectric acceleration sensor - Google Patents
Differential piezoelectric acceleration sensor Download PDFInfo
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- CN1862262A CN1862262A CN 200610054356 CN200610054356A CN1862262A CN 1862262 A CN1862262 A CN 1862262A CN 200610054356 CN200610054356 CN 200610054356 CN 200610054356 A CN200610054356 A CN 200610054356A CN 1862262 A CN1862262 A CN 1862262A
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- pedestal
- piezoelectric element
- electrode
- differential
- acceleration transducer
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Abstract
The present invention relates to a differential piezoelectric acceleration transducer. It includes an isolated base seat which uses vertically-drawn central line of H-type section as axis and can be rotated at 180 deg. to form rotator and a shell body which is cover-mounted on said base seat and is equipped with a plug socket. On the upper disk surface of said base seat from bottom to top are successively fixed Teflon washer, electrode, lower piezoelectric element, electrode, Teflon washer, inertial mass block, Teflon washer, electrode, upper piezoelectric element, electrode and Teflon washer. The signal lead wires connected with piezoelectric elements are directly connected on the all electrodes respectively, and said shell body is fixedly coupled with lower disk of said isolated base seat.
Description
Technical field
The present invention relates to acceleration transducer, specifically, relate to the piezoelectric acceleration sensor of differential type.
Background technology
Acceleration transducer is the class in the sensor family, and the patent No. is 01218061.0, to be called " differential piesoelectric acceleration transducer " be exactly one of them to name.This acceleration transducer (referring to Fig. 1) be by upside inertial mass 1, upside piezoelectricity pottery magnetic 2, housing 3, downside piezoelectricity pottery magnetic 4, go between 5, loam cake 6, fastening bolt 7, output line 8, downside inertial mass 9 and base 10 constitute.When the stressed motion of this sensor, the inertia effect of two inertial mass will make the piezoelectric element surface produce and the corresponding quantity of electric charge of measured acceleration magnitude, reflect by the size of measuring acceleration by detecting the electric charge output quantity.Yet the difficulty of processing of the housing of this piezoelectric acceleration transducer is big, and the temperature transient characteristic is poor, anti-adaptability to changes is poor, owing to used the own wt of two inertial mass thereby sensor big; In addition since pretightning force come down to apply up by housing, change the pretightning force that all can have influence on piezoelectric element when external condition (as temperature, sound), make undesired signal append to piezoelectric element, cause undesirable non-vibration signal output, increased test errors.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the prior art deficiency, propose a kind of not only simple in structure, in light weight, be easy to processing and manufacturing, can realize differential measurement to acceleration signal, and frequency response is wide, highly sensitive, and the temperature transient characteristic is good, the differential piesoelectric acceleration transducer of the error that the variation of anti-environment (as temperature, humidity) brings to measurement.
Solving the technical scheme that technical matters adopted that the present invention proposes, is a kind of like this differential piesoelectric acceleration transducer.Aspect same as the prior art is that this sensor comprises that pedestal, cover are contained in the housing of the band socket on this pedestal, are fixedly mounted in piezoelectric element, pad and the inertial mass in this housing and are connected piezoelectric element and the signal lead of socket by pretension bolt.Improvements of the present invention are that piezoelectric element, pad and inertial mass in the housing are mounted on this sensor base.This pedestal is for isolating pedestal, and it is that the perpendicular center line of drawing with i shaped cross section is axis, the Rotate 180 ° rotary body that forms (obvious, as if this spin crossover is regarded or be expressed as the Contraband type, then to rotate 360 °).On disc face on this pedestal, by be screwed in pretension bolt on its axle center, from top to bottom be fixed with successively the teflon gasket that is annular and its external diameter and the last disk of this pedestal and all equates, electrode, lower piezoelectric element, electrode, teflon gasket, inertial mass, teflon gasket, an electrode, go up piezoelectric element, electrode and teflon gasket; The signal lead that is connected with piezoelectric element is directly to be connected on each electrode of being close to this upper and lower piezoelectric element; It is that lower disc with this isolation pedestal is fixedly connected greater than last disk, this housing of this isolation pedestal that cover is contained in the internal diameter of described pedestal upper shell.
When sensor of the present invention has downward acceleration, at this moment inertial mass will produce inertial force upwards, go up the piezoelectric element pressurized, owing to the reason of pretightning force, the lower piezoelectric element is equivalent to tension, and the result produces the electric charge of positive and negative variation on the surface of two piezoelectric elements; Otherwise when sensor of the present invention has the acceleration that makes progress, inertial mass will produce downward inertial force, reason owing to pretightning force, at this moment go up piezoelectric element and be equivalent to tension, lower piezoelectric element pressurized, the result produces the negative electric charge that is just changing on two surface; Two groups of signals connect with the differential type charge amplifier by the on line of each electrode, signal lead, socket and commercially available band teflon connector, just can realize the measurement to tested vibration acceleration.
Compared with prior art, the invention has the beneficial effects as follows:
Owing to have only an inertial mass, therefore, in its housing, just needn't as prior art, process a partition, so simple in structure, in light weight, be easy to processing and manufacturing; Owing to adopted isolation pedestal technology, improved the anti-adaptability to changes of sensor base and improved the characteristic that sensor transient temperature etc. conforms; Adopt the reason of variate mode, it is highly sensitive in addition, can overcome the error that the variation because of environment (as temperature, humidity) brings to measurement.
The present invention is suitable under multiple occasion the measurement to acceleration.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the structure diagram of existing differential piesoelectric acceleration transducer;
Fig. 2 is the structure diagram of the differential piesoelectric acceleration transducer that the present invention relates to.
Embodiment
A kind of differential piesoelectric acceleration transducer (with reference to figure 2).This sensor comprises that pedestal, cover are contained in the housing of the band socket on this pedestal 011, are fixedly mounted in piezoelectric element, pad and the inertial mass in this housing and are connected piezoelectric element and the signal lead of socket by pretension bolt.Feature of the present invention is that piezoelectric element, pad and inertial mass 09 in the described housing 02 are mounted on this pedestal 013.This pedestal 013 is for isolating pedestal, and it is that the perpendicular center line of drawing with i shaped cross section is axis, the Rotate 180 ° rotary body that forms.On disc face on this pedestal 013, by be screwed in pretension bolt on its axle center, from top to bottom be fixed with successively the teflon gasket 014 that is annular and its external diameter and the last disk of this pedestal 013 and all equates, electrode 015, lower piezoelectric element 016, electrode 017, teflon gasket 018, inertial mass 09, teflon gasket 08, an electrode 07, go up piezoelectric element 04, electrode 06 and teflon gasket 03 (obviously, the circular hole in the middle of all circular ring types is the bolt via hole that allows this pretension bolt pass).The signal lead 010 that is connected with piezoelectric element (016,04) is directly to be connected on each electrode (06,07,017,015) of being close to this upper and lower piezoelectric element (04,016); It is that lower disc with this isolation pedestal 013 is fixedly connected greater than last disk, this housing 02 of this isolations pedestal 013 that cover is contained in the internal diameter of this pedestal 013 upper shell 02---welding, interference fit, the existing any known fixed forms such as screw or pin of passing through.
Further, the upper and lower piezoelectric element in this embodiment (04,016) is the quartz wafer of X0 ° of cut type.
Say that further (being formed by the i shaped cross section rotation) diameter of ring groove between isolation pedestal 013 waist in this embodiment is 1/2 of disk diameter on it.Like this, just guaranteed the buffer action of pedestal 013 further.
Again further, the pretension bolt in this embodiment is made of a double threaded screw 01 and a pre-load nut 05, and this pre-load nut 05 is a round nut, and its external diameter equates with the last disk of described isolation pedestal 013.
Claims (5)
1, a kind of differential piesoelectric acceleration transducer, this sensor comprises that pedestal, cover are contained in the housing of the band socket on this pedestal, are fixedly mounted in piezoelectric element, pad and the inertial mass in this housing and are connected piezoelectric element and the signal lead of socket by pretension bolt, it is characterized in that piezoelectric element, pad and inertial mass (09) in the described housing (02) are mounted on this pedestal (013); This pedestal (013) is for isolating pedestal, and it is that the perpendicular center line of drawing with i shaped cross section is axis, the Rotate 180 ° rotary body that forms; On the last disc face of this pedestal (013), by be screwed in pretension bolt on its axle center, from top to bottom be fixed with successively the teflon gasket (014), electrode (015), lower piezoelectric element (016), electrode (017), teflon gasket (018), an inertial mass (09), teflon gasket (08), the electrode (07) that are annular and its external diameter and the last disk of this pedestal (013) and all equate, go up piezoelectric element (04), electrode (06) and teflon gasket (03); The described signal lead (010) that is connected with piezoelectric element (016,04) is directly to be connected on each electrode (06,07,017,015) of being close to this upper and lower piezoelectric element (04,016); The internal diameter that cover is contained in described pedestal (013) upper shell (02) is that lower disc with this isolation pedestal (013) is fixedly connected greater than this last disk, this housing (02) of isolating pedestal (013).
2, differential piesoelectric acceleration transducer according to claim 1 is characterized in that, described upper and lower piezoelectric element (04,016) is the quartz wafer of X0 ° of cut type.
3, differential piesoelectric acceleration transducer according to claim 1 and 2 is characterized in that, the diameter of ring groove between described isolation pedestal (013) waist is 1/2 of disk diameter on it.
4, differential piesoelectric acceleration transducer according to claim 1 and 2, it is characterized in that, described pretension bolt is made of a double threaded screw (01) and a pre-load nut (05), and this pre-load nut (05) is a round nut, and its external diameter equates with the last disk of described isolation pedestal (013).
5, differential piesoelectric acceleration transducer according to claim 3, it is characterized in that, described pretension bolt is made of a double threaded screw (01) and a pre-load nut (05), and this pre-load nut (05) is a round nut, and its external diameter equates with the last disk of described isolation pedestal (013).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610054356 CN1862262A (en) | 2006-06-13 | 2006-06-13 | Differential piezoelectric acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610054356 CN1862262A (en) | 2006-06-13 | 2006-06-13 | Differential piezoelectric acceleration sensor |
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| Publication Number | Publication Date |
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| CN1862262A true CN1862262A (en) | 2006-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610054356 Pending CN1862262A (en) | 2006-06-13 | 2006-06-13 | Differential piezoelectric acceleration sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108291926A (en) * | 2015-12-04 | 2018-07-17 | 基斯特勒控股公司 | Accelerograph and the method for manufacturing this accelerograph |
| CN108369244A (en) * | 2015-12-04 | 2018-08-03 | 基斯特勒控股公司 | Accelerograph and method for manufacturing this accelerograph |
| CN109212263A (en) * | 2018-10-18 | 2019-01-15 | 长安大学 | A kind of electric acceleration transducer of rotary table array flexure |
| CN109900927A (en) * | 2019-04-01 | 2019-06-18 | 中电科技集团重庆声光电有限公司 | A kind of piezoelectric acceleration sensor and preparation method thereof |
-
2006
- 2006-06-13 CN CN 200610054356 patent/CN1862262A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108291926A (en) * | 2015-12-04 | 2018-07-17 | 基斯特勒控股公司 | Accelerograph and the method for manufacturing this accelerograph |
| CN108369244A (en) * | 2015-12-04 | 2018-08-03 | 基斯特勒控股公司 | Accelerograph and method for manufacturing this accelerograph |
| CN108291926B (en) * | 2015-12-04 | 2020-08-07 | 基斯特勒控股公司 | Acceleration measuring device and method for producing such an acceleration measuring device |
| CN108369244B (en) * | 2015-12-04 | 2020-08-07 | 基斯特勒控股公司 | Acceleration measuring device and method for producing such an acceleration measuring device |
| CN109212263A (en) * | 2018-10-18 | 2019-01-15 | 长安大学 | A kind of electric acceleration transducer of rotary table array flexure |
| CN109900927A (en) * | 2019-04-01 | 2019-06-18 | 中电科技集团重庆声光电有限公司 | A kind of piezoelectric acceleration sensor and preparation method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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