CN112415226B - High-temperature-resistant ground insulation type acceleration sensor - Google Patents
High-temperature-resistant ground insulation type acceleration sensor Download PDFInfo
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- CN112415226B CN112415226B CN202011460754.7A CN202011460754A CN112415226B CN 112415226 B CN112415226 B CN 112415226B CN 202011460754 A CN202011460754 A CN 202011460754A CN 112415226 B CN112415226 B CN 112415226B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
Abstract
The invention discloses a high-temperature-resistant ground insulation type acceleration sensor which comprises a base, a shell, a sensitive core and a connector, wherein the outer wall of the upper end of the base is sleeved with the shell, the sensitive core is arranged in the shell, the connector is inserted in the upper end of the shell, the lower end of the connector is connected with a lead, the lower end of the lead is connected with the sensitive core, the sensitive core consists of mass blocks and a central column, the mass blocks are symmetrically distributed on two sides of the central column, and piezoelectric materials are arranged between the two mass blocks and the central column. According to the invention, under the condition that the shape of the sensor body is not changed, the high-rigidity high-temperature-resistant ceramic material is adopted to replace stainless steel, the frequency response characteristic of the sensor body is not lost, the ground insulation is realized, the impedance value is larger, the high-temperature-resistant ceramic sensor can be applied to a high-temperature environment, and the actual application range is wider.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a high-temperature-resistant ground insulation type acceleration sensor.
Background
The sensor is insulated from the ground, in the field of vibration testing, a tested piece is often dragged by a motor or placed on equipment dragged by the motor, electromagnetic interference may exist on the surface of the tested piece, the sensor is directly installed to influence a data acquisition result and is isolated from the sensor for testing, and therefore the situation that a test signal is interfered and is always necessary for a test engineer is avoided.
In the actual test process, mainly adopt to paste the insulation board, install or repack the insulator saddle additional and use forms such as double-deck insulating nature sensor to realize that the sensor is insulating to ground, when using to paste the insulation board and install or repack the insulator saddle additional, can increase installation thickness to reduced the installation rigidity, can directly influence the high frequency response of sensor, reduced the high frequency test ability of sensor, can influence the test result even, if the test failure will directly bring economic loss.
The proposed ground insulation measures do not have a high temperature resistance function, and limit the adoption of a double-layer insulation type sensor to avoid the situation, but the double-layer insulation type sensor is heavy due to the structural problem of the double-layer insulation type sensor, and the test frequency is not high, so that the double-layer insulation type sensor is difficult to use in high-frequency test.
Disclosure of Invention
The present invention is directed to a high temperature resistant ground-insulated acceleration sensor to solve the above-mentioned problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a high-temperature-resistant ground insulation type acceleration sensor comprises a base, a shell, a sensitive core and a connector, wherein the shell is sleeved on the outer wall of the upper end of the base, the sensitive core is arranged in the shell, the connector is inserted in the upper end of the shell, the lower end of the connector is connected with a lead, and the lower end of the lead is connected with the sensitive core;
the sensitive core body is composed of mass blocks and a central column, the mass blocks are symmetrically distributed on two sides of the central column, and piezoelectric materials are arranged between the two mass blocks and the central column.
Preferably, the base is made of high-rigidity high-temperature-resistant ceramic materials, and the outer wall of the base is designed in a regular hexagon shape;
the edge of the upper surface of the base is provided with a connecting ring, the connecting ring is made of a metallized ceramic material, the connecting ring is pre-cured on a ceramic material, the ceramic material and the connecting ring are subjected to secondary processing, the connecting ring and the base are integrated, the lower end of the shell is welded with the connecting ring, and the upper end of the shell is welded with the connecting nozzle;
the shell, the connecting ring and the connecting nozzle are welded to form welding lines which are distributed in a circular mode, the welding process adopts a high-energy laser welding sealing mode, the interior of the shell is sealed, the depth of each welding line is 1mm, and the shell, the connecting nozzle and the connecting ring are made of INCONEL600 nickel-based alloy materials.
Preferably, the nozzle is made by adopting a high-temperature glass sintering process, the using temperature can reach 400 ℃, and signals can be isolated from the detected surface through the ceramic base.
Preferably, the sensitive core body is connected with the base through the central column, so that the sensitive core body is completely insulated from the base, and meanwhile, the base is made of high-temperature-resistant ceramic materials and has the advantage of high temperature resistance.
Preferably, the lead is made of a platinum wire material, and the sensitive core body is connected with the connecting nozzle by butt welding through a cold welding machine.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the metallized ceramic material, realizes the perfect combination of metal and ceramic, uses the high-rigidity high-temperature resistant ceramic material to replace the traditional stainless steel material, does not lose the frequency response characteristic of the sensor body, realizes the effective insulation to the ground, replaces the traditional epoxy resin sealing connector with the connector made of high-temperature sintered glass material, is more resistant to high temperature and oxidation, and has good signal stability.
2. According to the invention, the base, the shell and the connector are welded into a sealed whole in a high-energy laser welding sealing mode without changing the appearance structure of the sensor or additionally adding components, so that the high-temperature resistance of the sensor body is improved, and the lead wire made of a platinum wire material is matched to replace the traditional common copper wire, so that the sensor has better high-temperature resistance and oxidation resistance and better signal stability.
Drawings
Fig. 1 is a main sectional structural schematic diagram of the present invention.
In the figure: 1. a base; 2. a housing; 3. a sensitive core; 4. a mass block; 5. a lead; 6. a nozzle is connected; 7. welding seams; 8. a central column; 9. a piezoelectric material; 10. and (7) connecting rings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present invention provides two embodiments:
the first embodiment is as follows:
a high-temperature-resistant ground-insulated acceleration sensor comprises a base 1, a shell 2, a sensitive core 3 and a connector 6, wherein the shell 2 is sleeved on the outer wall of the upper end of the base 1, the sensitive core 3 is arranged inside the shell 2, the connector 6 is inserted inside the upper end of the shell 2, the lower end of the connector 6 is connected with a lead 5, the lower end of the lead 5 is connected with the sensitive core 3, the base 1 is made of a metalized ceramic material, perfect combination of metal and ceramic is realized, the high-rigidity high-temperature-resistant ceramic material is used for replacing the traditional stainless steel material, the frequency response characteristic of a sensor body cannot be lost, effective insulation to the ground is realized, the connector 6 made of a high-temperature sintered glass material replaces the traditional epoxy resin sealing connector 6, high-temperature resistance and oxidation resistance are achieved, and signal stability is good;
the sensitive core body 3 is composed of mass blocks 4 and a central column 8, the mass blocks 4 are symmetrically distributed on two sides of the central column 8, piezoelectric materials 9 are arranged between the two mass blocks 4 and the central column 8, the base 1 is made of insulating materials and does not have a grounding function, and the isolation effect of a sensor body signal ground and the base 1 is achieved by adopting a mode of a shell 2 step, so that the signal interference is reduced, and the purpose of insulating the ground is achieved.
The second embodiment:
the base 1 is made of high-rigidity high-temperature-resistant ceramic materials, and the outer wall of the base 1 is in a regular hexagon design;
the edge of the upper surface of the base 1 is provided with a connecting ring 10, the connecting ring 10 is made of a metallized ceramic material, the connecting ring 10 is pre-cured on the ceramic material, the ceramic material and the connecting ring 10 are subjected to secondary processing, the connecting ring 10 and the base 1 are integrated, the lower end of the shell 2 is welded with the connecting ring 10, and the upper end of the shell 2 is welded with the nozzle 6;
the welding positions of the shell 2, the connecting ring 10 and the connecting nozzle 6 form welding seams 7 which are distributed in a circular mode, the welding process adopts a high-energy laser welding sealing mode, so that the interior of the shell 2 is sealed, the depth of each welding seam 7 is 1mm, and the shell 2, the connecting nozzle 6 and the connecting ring 10 are made of INCONEL600 nickel-based alloy materials.
The connector 6 is made by adopting a high-temperature glass sintering process, the use temperature can reach 400 ℃, and signals can be isolated from the detected surface through the base 1 made of ceramic materials.
The sensitive core body 3 is connected with the base 1 through the central column 8, so that the sensitive core body 3 is completely insulated from the base 1, and meanwhile, the base 1 is made of high-temperature-resistant ceramic materials and has the advantage of high temperature resistance.
The lead 5 is designed by platinum wire material, and a cold welding machine is adopted for butt welding to connect the sensitive core body 3 and the connecting nozzle 6.
The working principle is as follows: the base 1 is made of a metallized ceramic material, perfect combination of metal and ceramic is realized, a high-rigidity high-temperature-resistant ceramic material is used for replacing a traditional stainless steel material, the frequency response characteristic of a sensor body cannot be lost, effective insulation to the ground is realized, a high-temperature sintered glass material nozzle 6 replaces a traditional epoxy resin sealing nozzle 6, the high-temperature-resistant and oxidation-resistant sensor is more resistant, the signal stability is good, the base 1 is made of an insulating material and does not have a grounding function, and the signal ground of the sensor body is isolated from the base 1 in a stepped mode of the shell 2, so that the signal interference is reduced, and the purpose of insulating the ground is achieved;
and need not to change sensor body appearance structure, need not additionally to increase the subassembly, adopt the sealed form of high energy laser welding, weld base 1, casing 2 and nipple 6 into sealed whole, improve sensor body's high temperature resistance, cooperate the lead wire 5 of platinum silk material, replaced traditional ordinary copper filament, possess better high temperature resistant and oxidation resistance to signal stability is better.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. The utility model provides a high temperature resistant insulating type acceleration sensor to ground, includes base (1), casing (2), sensitive core (3) and nipple (6), its characterized in that: the outer wall of the upper end of the base (1) is sleeved with a shell (2), a sensitive core body (3) is arranged inside the shell (2), a connector (6) is inserted inside the upper end of the shell (2), the lower end of the connector (6) is connected with a lead (5), and the lower end of the lead (5) is connected with the sensitive core body (3);
the sensitive core body (3) is composed of mass blocks (4) and a central column (8), the mass blocks (4) are symmetrically distributed on two sides of the central column (8), and piezoelectric materials (9) are arranged between the two mass blocks (4) and the central column (8);
the base (1) is made of high-rigidity high-temperature-resistant ceramic materials, and the outer wall of the base (1) is designed to be a regular hexagon;
the edge of the upper surface of the base (1) is provided with a connecting ring (10), the connecting ring (10) is made of a metalized ceramic material, the connecting ring (10) is pre-cured on the ceramic material, the ceramic material and the connecting ring (10) are subjected to secondary processing, the connecting ring (10) and the base (1) are integrated, the lower end of the shell (2) is welded with the connecting ring (10), and the upper end of the shell (2) is welded with the connector (6);
the welding process adopts a high-energy laser welding sealing mode, so that the inside of the shell (2) is sealed, the depth of the welding line (7) is 1mm, and the shell (2), the connecting nozzle (6) and the connecting ring (10) are all made of an INCONEL600 nickel-based alloy material.
2. A high-temperature-resistant ground-insulated acceleration sensor according to claim 1, characterized in that: the connector (6) is made by adopting a high-temperature glass sintering process, the use temperature can reach 400 ℃, and signals can be isolated from the measured surface through the base (1) made of ceramic materials.
3. A high-temperature-resistant ground-insulated acceleration sensor according to claim 1, characterized in that: the sensitive core body (3) is connected with the base (1) through the central column (8), so that the sensitive core body (3) is completely insulated from the base (1), and meanwhile, the base (1) is made of high-temperature-resistant ceramic materials and has the advantage of high temperature resistance.
4. A high-temperature-resistant ground-insulated acceleration sensor according to claim 1, characterized in that: the lead (5) is designed by adopting a platinum wire material, and a cold welding machine is adopted for butt welding to connect the sensitive core body (3) and the connecting nozzle (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011460754.7A CN112415226B (en) | 2020-12-12 | 2020-12-12 | High-temperature-resistant ground insulation type acceleration sensor |
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| CN202011460754.7A CN112415226B (en) | 2020-12-12 | 2020-12-12 | High-temperature-resistant ground insulation type acceleration sensor |
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| CN112415226A CN112415226A (en) | 2021-02-26 |
| CN112415226B true CN112415226B (en) | 2023-03-14 |
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| CN113985067A (en) * | 2021-12-29 | 2022-01-28 | 山东利恩斯智能科技有限公司 | Plane deflection type high-sensitivity acceleration sensor and manufacturing method thereof |
Citations (3)
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|---|---|---|---|---|
| CN102901841A (en) * | 2012-11-01 | 2013-01-30 | 江苏联能电子技术有限公司 | Intelligent three-direction acceleration sensor |
| CN203858052U (en) * | 2014-04-25 | 2014-10-01 | 中国电子科技集团公司第四十九研究所 | Pressure sensitive component adopting ceramic metal tube shell axial sintering |
| CN108749002A (en) * | 2018-05-31 | 2018-11-06 | 深圳市零度智控科技有限公司 | Network-based 3D printing method, equipment and computer readable storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2329969Y (en) * | 1998-06-01 | 1999-07-21 | 中国科学院上海硅酸盐研究所 | Heat insulation combined sleeve for high-temp. (400 deg.C) piezo-accelerometer |
| US6862795B2 (en) * | 2002-06-17 | 2005-03-08 | Vty Holding Oy | Method of manufacturing of a monolithic silicon acceleration sensor |
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- 2020-12-12 CN CN202011460754.7A patent/CN112415226B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901841A (en) * | 2012-11-01 | 2013-01-30 | 江苏联能电子技术有限公司 | Intelligent three-direction acceleration sensor |
| CN203858052U (en) * | 2014-04-25 | 2014-10-01 | 中国电子科技集团公司第四十九研究所 | Pressure sensitive component adopting ceramic metal tube shell axial sintering |
| CN108749002A (en) * | 2018-05-31 | 2018-11-06 | 深圳市零度智控科技有限公司 | Network-based 3D printing method, equipment and computer readable storage medium |
Non-Patent Citations (1)
| Title |
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| 加速度传感器种类剖析及适用性;徐文骏;《中国检验检测》;20191231(第4期);28-29、42 * |
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