阅读说明：本技术 一种耐高温对地绝缘型加速度传感器 (High-temperature-resistant ground insulation type acceleration sensor ) 是由 郇正利 董超 马立智 于 2020-12-12 设计创作，主要内容包括：本发明公开了一种耐高温对地绝缘型加速度传感器,包括底座、壳体、敏感芯体和接嘴,所述底座上端外壁套接有壳体,所述壳体内部设置有敏感芯体,所述壳体上端内部插接有接嘴,所述接嘴下端连接有引线,所述引线下端与敏感芯体相连接,所述敏感芯体由质量块和中心柱构成,所述质量块对称分布在中心柱两侧,两个所述质量块与中心柱之间设置有压电材料。本发明在不改变传感器本体外形的情况下,采用高刚性耐高温陶瓷材料代替不锈钢,不会损失传感器本体的频响特性,并且实现对地绝缘,阻抗值更大,还能够应用于高温环境中,实际使用范围更加广泛。(The invention discloses a high-temperature-resistant ground insulation type acceleration sensor which comprises a base, a shell, a sensitive core body and a connector, wherein the outer wall of the upper end of the base is sleeved with the shell, the sensitive core body 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 body, 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. According to the invention, under the condition of not changing the appearance of the sensor body, 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 sensor can be applied to a high-temperature environment, and the actual application range is wider.)

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 (3) is arranged inside the shell (2), a connecting nozzle (6) is inserted inside the upper end of the shell (2), the lower end of the connecting nozzle (6) is connected with a lead (5), and the lower end of the lead (5) is connected with the sensitive core (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).

2. A high-temperature-resistant ground-insulated acceleration sensor according to claim 1, characterized in that: 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 metallized ceramic material, the connecting ring (10) is pre-cured on a ceramic material, secondary processing is carried out on the ceramic material and the connecting ring (10), 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 connecting nozzle (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 INCONEL 600 nickel-based alloy material.

3. 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.

4. 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.

5. 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).

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 ground insulation measures do not have a high-temperature resistance function, the double-layer insulation type sensor is limited to avoid the situation, but the double-layer insulation type sensor is heavy due to the self-structure problem, the testing frequency is not high, and the double-layer insulation type sensor is difficult to use in high-frequency testing.

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 in a regular hexagon design;

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 a welding line which is 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 the welding line is 1mm, and the shell, the connecting nozzle and the connecting ring are made of INCONEL 600 nickel-based alloy materials.

Preferably, the nozzle 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 made of ceramic materials.

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 wire; 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" and "second" 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 is to be noted that, unless otherwise explicitly specified or limited, 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.

Example two:

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 INCONEL 600 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.