CN212674955U - High-temperature acceleration sensor - Google Patents
High-temperature acceleration sensor Download PDFInfo
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- CN212674955U CN212674955U CN202021784759.0U CN202021784759U CN212674955U CN 212674955 U CN212674955 U CN 212674955U CN 202021784759 U CN202021784759 U CN 202021784759U CN 212674955 U CN212674955 U CN 212674955U
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- acceleration sensor
- piezoelectric element
- groove
- base
- temperature acceleration
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Abstract
The utility model discloses a high temperature acceleration sensor, including base and casing, form the closed cavity between base and the casing, install piezoelectric element and quality piece in the closed cavity, the up end undercut of base forms the recess, be provided with the fixed plate in the recess, the fixed plate is interference fit with the recess, the up end undercut of fixed plate forms the fixed slot, in piezoelectric element's the bottom embedding fixed slot, piezoelectric element's top is provided with compresses tightly the lid, the quality piece is installed and is being compressed tightly and cover, still includes the screw rod, the screw rod passes the quality piece in proper order, compresses tightly lid and piezoelectric element and fixed plate and base threaded connection, the fixed plate, compresses tightly lid and screw rod and all adopt high temperature resistant material to make. The utility model provides a current acceleration sensor measure unsafe problem under high temperature environment.
Description
Technical Field
The utility model relates to a sensor technical field, concretely relates to high temperature acceleration sensor.
Background
The acceleration sensor is a sensor for measuring acceleration.
The acceleration sensor comprises a piezoelectric acceleration sensor, and the structure of the piezoelectric acceleration sensor generally comprises an inertia mass block and a piezoelectric sheet; the two are fixed by a center rod and then packaged; the piezoelectric plate is generally made of quartz crystal or piezoelectric ceramic, and the mass block and the central rod are generally made of metal materials. The principle is that the vibration causes the position change of the sensor mass block, and the force of the mass block on the piezoelectric element is changed when the accelerometer is vibrated by utilizing the piezoelectric effect of the piezoelectric ceramic or the quartz crystal.
The existing acceleration sensor has more accurate data measured at normal temperature or in the environment below 80 ℃, and when the environment temperature is higher than 80 ℃, the measurement precision of the acceleration sensor is easily influenced by the temperature, so that the measurement is inaccurate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high temperature acceleration sensor solves current acceleration sensor and measures unsafe problem under high temperature environment.
The utility model discloses a following technical scheme realizes:
the utility model provides a high temperature acceleration sensor, includes base and casing, form the closed cavity between base and the casing, install piezoelectric element and quality piece in the closed cavity, the up end undercut of base forms the recess, be provided with the fixed plate in the recess, the fixed plate is interference fit with the recess, the up end undercut of fixed plate forms the fixed slot, in piezoelectric element's the bottom embedding fixed slot, piezoelectric element's top is provided with compresses tightly the lid, the quality piece is installed and is being compressed tightly and cover, still includes the screw rod, the screw rod passes the quality piece in proper order, compresses tightly lid and piezoelectric element and fixed plate and base threaded connection, the fixed plate, compresses tightly lid and screw rod and all adopt high temperature resistant material to make.
The piezoelectric element of the utility model comprises a piezoelectric ceramic material, an insulating layer and a lead, wherein the lead is led out through a through hole arranged on a base; the high temperature resistant material is the prior art.
Preferably, the shell is made of existing heat insulation materials.
The root cause of inaccurate measurement of the existing acceleration sensor in a high-temperature environment is that the difference between the thermal expansion coefficients of the materials of the parts (base, mass block and bolt) based on the piezoelectric element material and the piezoelectric element material is large.
The utility model discloses a setting is compressed tightly the lid and is used for separating piezoelectric element and quality piece, avoids the quality piece direct and piezoelectric element contact, through setting up the fixed plate, avoids piezoelectric element direct and base contact, and all adopts high temperature resistant material to make with the fixed plate of piezoelectric element contact, compress tightly lid and screw rod, high temperature resistant material is close with the thermal expansion coefficient of piezoelectric element material, can solve current acceleration sensor and measure unsafe problem under high temperature environment.
Furthermore, a plurality of limiting plates are arranged on the outer side of the fixing groove at the upper end face of the fixing plate, the limiting plates are arranged in an annular array mode, and the limiting plates and the fixing plate are of an integrally formed structure.
The limiting plate can further limit the piezoelectric element, and stability of the piezoelectric element is improved.
Furthermore, the height of the fixing plate is lower than the depth of the groove, and the top of the limiting plate protrudes out of the groove.
Furthermore, the lower end face of the pressing cover is provided with a first clamping groove matched with the piezoelectric element.
The top of the piezoelectric element is embedded into the first clamping groove, so that the overall stability is improved.
Furthermore, the upper end face of the pressing cover is provided with a second clamping groove matched with the mass block.
The mass block part is embedded into the second clamping groove, so that the overall stability is improved.
Further, the screw rod is provided with a nut in a matching mode.
Further, the upper end face of the base is provided with an annular groove for mounting the housing.
Further, the high-temperature resistant material is a carbon fiber plate.
The carbon fiber plate is prior art.
Further, vacuum is pumped in the closed cavity.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a setting compresses tightly the lid and is used for separating piezoelectric element and quality piece, avoids the quality piece direct and piezoelectric element contact, through setting up the fixed plate, avoids piezoelectric element direct and base contact, and all adopts high temperature resistant material to make with the fixed plate of piezoelectric element contact, compress tightly lid and screw rod, high temperature resistant material is close with the thermal expansion coefficient of piezoelectric element material, can solve current acceleration sensor and measure unsafe problem under high temperature environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of an acceleration sensor.
Reference numbers and corresponding part names in the drawings:
the piezoelectric vibration damper comprises a shell 1, a mass block 2, a screw rod 3, a pressing cover 4, a piezoelectric element 5, a limiting plate 6, a fixing plate 7 and a base 8.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1:
as shown in fig. 1, the high temperature acceleration sensor comprises a base 8 and a housing 1, wherein a closed cavity is formed between the base 8 and the housing 1, the closed cavity is vacuumized, the piezoelectric element 5 and the mass block 2 are arranged in the closed cavity, the upper end surface of the base 8 is downwards sunken to form a groove, a fixing plate 7 is arranged in the groove, the fixing plate 7 is in interference fit with the groove, the upper end surface of the fixing plate 7 is downwards sunken to form a fixing groove, the bottom of the piezoelectric element 5 is embedded into the fixing groove, the top of the piezoelectric element 5 is provided with a pressing cover 4, the mass block 2 is arranged on the pressing cover 4, the piezoelectric element structure further comprises a screw 3, the screw 3 sequentially penetrates through the mass block 2, the pressing cover 4, the piezoelectric element 5 and the fixing plate 7 to be in threaded connection with the base 8, and the fixing plate 7, the pressing cover 4 and the screw 3 are all made of high-temperature-resistant materials; the high-temperature resistant material is a carbon fiber plate.
In this embodiment, through setting up and compressing tightly lid 4 and be used for separating piezoelectric element 5 and quality piece 2, avoid quality piece 2 direct and piezoelectric element 5 contact, through setting up fixed plate 7, avoid piezoelectric element 5 direct and base 8 contact, and fixed plate 7, compressing tightly lid 4 and screw rod 3 with piezoelectric element 5 contact all adopt the carbon fiber board to make, the carbon fiber board is close with the coefficient of thermal expansion of piezoelectric element material, can solve current acceleration sensor and measure unsafe problem under high temperature environment
Example 2:
as shown in fig. 1, in this embodiment, based on embodiment 1, a plurality of limiting plates 6 are disposed on the upper end surface of the fixing plate 7 outside the fixing groove, the plurality of limiting plates 6 are arranged in an annular array, and the limiting plates 6 and the fixing plate 7 are in an integrally formed structure; the height of the fixed plate 7 is lower than the depth of the groove, and the top of the limiting plate 6 protrudes out of the groove; the lower end face of the pressing cover 4 is provided with a first clamping groove matched with the piezoelectric element 5; a second clamping groove matched with the mass block 2 is formed in the upper end face of the compression cover 4; the screw rod 3 is provided with a screw cap in a matching way; the upper end face of the base 8 is provided with an annular groove for mounting the housing 1.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A high-temperature acceleration sensor comprises a base (8) and a shell (1), wherein a closed cavity is formed between the base (8) and the shell (1), a piezoelectric element (5) and a mass block (2) are installed in the closed cavity, and the high-temperature acceleration sensor is characterized in that the upper end surface of the base (8) is sunken downwards to form a groove, a fixing plate (7) is arranged in the groove, the fixing plate (7) is in interference fit with the groove, the upper end surface of the fixing plate (7) is sunken downwards to form a fixing groove, the bottom of the piezoelectric element (5) is embedded into the fixing groove, a pressing cover (4) is arranged at the top of the piezoelectric element (5), the mass block (2) is installed on the pressing cover (4), and the high-temperature acceleration sensor further comprises a screw rod (3), the screw rod (3) sequentially penetrates through the mass block (2), the pressing cover (4), the piezoelectric element (5) and the, the fixing plate (7), the pressing cover (4) and the screw (3) are all made of high-temperature-resistant materials.
2. The high-temperature acceleration sensor according to claim 1, wherein the upper end surface of the fixing plate (7) is provided with a plurality of limiting plates (6) outside the fixing groove, the plurality of limiting plates (6) are arranged in a ring array, and the limiting plates (6) and the fixing plate (7) are of an integrally formed structure.
3. A high-temperature acceleration sensor according to claim 2, characterized in that, the height of the fixed plate (7) is lower than the depth of the groove, and the top of the limiting plate (6) protrudes from the groove.
4. A high-temperature acceleration sensor according to claim 1, characterized in that, the lower end face of the compressing cover (4) is provided with a first clamping groove matched with the piezoelectric element (5).
5. A high-temperature acceleration sensor according to claim 1, characterized in that, the upper end face of the compressing cover (4) is provided with a second clamping groove matched with the mass block (2).
6. A high-temperature acceleration sensor according to claim 1, characterized in, that, the screw (3) is provided with a nut.
7. A high temperature acceleration sensor according to claim 1, characterized in, that the upper end surface of the base (8) is provided with an annular groove for mounting the housing (1).
8. A high-temperature acceleration sensor according to claim 1, characterized in that, the high-temperature resistant material is carbon fiber board.
9. The high temperature acceleration sensor of claim 1, characterized in, that the closed cavity is evacuated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021784759.0U CN212674955U (en) | 2020-08-24 | 2020-08-24 | High-temperature acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021784759.0U CN212674955U (en) | 2020-08-24 | 2020-08-24 | High-temperature acceleration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212674955U true CN212674955U (en) | 2021-03-09 |
Family
ID=74820644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021784759.0U Expired - Fee Related CN212674955U (en) | 2020-08-24 | 2020-08-24 | High-temperature acceleration sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212674955U (en) |
-
2020
- 2020-08-24 CN CN202021784759.0U patent/CN212674955U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210309 Termination date: 20210824 |
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| CF01 | Termination of patent right due to non-payment of annual fee |