CN216524467U - Piezoelectric type force sensor - Google Patents

Abstract

The utility model discloses a piezoelectric force sensor which comprises a base, wherein an electrical function adjusting bush and a stable compensation piece are arranged at the bottom in the base, a first crystal wafer is placed on the stable compensation piece, a conductive sheet body is placed at the upper end of the first crystal wafer, a second crystal wafer is placed at the upper end of the conductive sheet body, a sensing film body is connected with the upper end of the base in a threaded manner, a conditioning circuit unit is installed in a port on the right side of the base, a sealing socket is connected with the right end in a threaded manner, a cable is inserted into the sealing socket, a sealing sleeve, a gasket, a limiting sleeve, a rubber ring and a compression nut are sequentially sleeved on the cable from left to right, the sealing sleeve, the gasket, the limiting sleeve, the rubber ring and the compression nut are inserted into the right end of the sealing socket, and the compression nut is in threaded connection with the sealing socket. Consequently, this practicality one side satisfies when drawing and pressing two direction power dynamic test function, has simplified frock and simple to operate, and on the other hand has improved the leakproofness of sensor, satisfies the experimental requirement under the trade deep water environment such as scientific research.

Description

Piezoelectric type force sensor

Technical Field

The utility model relates to the technical field of force sensors, in particular to a piezoelectric type force sensor.

Background

A force sensor is a device that converts various mechanical quantities into electrical signals. However, the existing force sensor has several disadvantages: 1. the existing piezoelectric force sensor can only realize unilateral pressure measurement, and if the dynamic measurement of tension and pressure is realized, a more complex tool structure is needed; 2. the existing piezoelectric force sensor is limited by structural design characteristics, has poor sealing performance and does not have underwater working conditions, particularly dynamic measurement of pulling and pressing under deep water conditions; the above two problems hinder the application and expansion of the piezoelectric force sensor. The present invention proposes a new solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a piezoelectric force sensor, which solves the above two problems of the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme:

a piezoelectric force sensor comprises a base, wherein an electric function adjusting bush is arranged on the left side of the bottom in the base, a stable compensation piece is arranged on the right side of the electric function adjusting bush, a first crystal wafer is arranged on the stable compensation piece, a conductive sheet body is arranged at the upper end of the first crystal sheet, a second crystal sheet is arranged at the upper end of the conductive sheet body, the sensing membrane body is connected with the upper end of the base in an internal thread manner, the conditioning circuit unit is arranged in the interface on the right side of the base, and the right end is internally threaded with a sealing socket, a cable is inserted into the sealing socket, a sealing sleeve, a gasket, a limiting sleeve, a rubber ring and a gland nut are sequentially sleeved on the cable from left to right, the sealing sleeve, the gasket, the limiting sleeve, the rubber ring and the compression nut are all inserted into the right end of the sealing socket, and the compression nut is in threaded connection with the sealing socket.

Furthermore, the sensing membrane body is connected with a connecting gap at the upper end of the base through laser welding, and the sealing socket is connected with a connecting gap at the right end of the base through laser welding.

Further, a first sealing element is arranged between the base and the sensing membrane body.

Furthermore, a line card is arranged in the limiting sleeve.

Furthermore, a second sealing element is arranged between the right side interface of the base and the sealing socket.

Furthermore, the left side interface of the sealing socket is internally filled with the cable head of the cable through a filling colloid.

Furthermore, the right ends of the conductive sheet body and the stable compensation piece are connected with a conditioning circuit unit through wires, and the right end of the conditioning circuit unit is connected with the cable through wires.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model has the advantages of simplifying the tool and being convenient to install while meeting the dynamic test function of the tension and compression forces in two directions, improving the sealing performance of the sensor and meeting the test requirements of industries such as scientific research and the like in deep water environment.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a front cross-sectional view of the present invention;

FIG. 4 is an enlarged schematic view of A in FIG. 3;

fig. 5 is an enlarged schematic view of B in fig. 3.

In the figure: 1. a base; 2. an electrical function adjustment bushing; 3. a stabilizing compensator; 4. a first crystal wafer; 5. a conductive sheet body; 6. a second crystal wafer; 7. a sensing membrane body; 8. a first sealing element; 9. a conditioning circuit unit; 10. sealing the socket; 11. a compression nut; 12. a rubber ring; 13. a limiting sleeve; 14. a gasket; 15. sealing sleeves; 16. a line card; 17. a cable wire; 18. and a second sealing element.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the utility model, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

According to an embodiment of the present invention, a piezoelectric force sensor is provided.

As shown in fig. 1-5, a piezoelectric force sensor comprises a base 1, an electrical function adjusting bush 2 is installed on the left side of the bottom in the base 1, a stable compensation part 3 is placed on the right side of the electrical function adjusting bush 2, a crystal piece I4 is placed on the stable compensation part 3, a conductive piece body 5 is placed at the upper end of the crystal piece I4, a crystal piece II 6 is placed at the upper end of the conductive piece body 5, a sensing membrane body 7 is connected with the upper end of the base 1 through internal threads, a conditioning circuit unit 9 is installed in a port on the right side of the base 1, a sealing socket 10 is connected with the right end through internal threads, a cable 17 is inserted into the sealing socket 10, a sealing sleeve 15, a gasket 14, a limiting sleeve 13, a rubber ring 12 and a gland nut 11 are sequentially sleeved on the cable 17 from left to right, the sealing sleeve 15, the gasket 14, the limiting sleeve 13, the rubber ring 12 and the gland nut 11 are all inserted into the right end of the sealing socket 10, the compression nut 11 is in threaded connection with the sealing socket 10;

the sensing membrane body 7 is connected with a connecting gap at the upper end of the base 1 through laser welding, the sealing socket 10 is connected with a connecting gap at the right end of the base 1 through laser welding, in order to meet the test function requirements of the two directions of the pulling and pressure of the sensor, a mounting threaded hole (the mounting threaded hole is a common structure in the force sensor, so that the mounting threaded hole is not indicated in the figure) is arranged on the sensing membrane body 7, and meanwhile, three mounting holes (the mounting hole is a common structure in the force sensor, so that the mounting hole is not indicated in the figure) are arranged on the base 1;

a first sealing element 8 is arranged between the base 1 and the sensing membrane body 7, and the sealing property between the base 1 and the sensing membrane body 7 is enhanced through the first sealing element 8;

a wire clamp 16 is arranged in the limiting sleeve 13, and the cable 17 is extruded, fixed and sealed through a sealing sleeve 15, a gasket 14, the limiting sleeve 13, a rubber ring 12 and a compression nut 11, so that the tightness and the sealing performance between the cable 17 and the sealing socket 10 are enhanced;

a second sealing element 18 is arranged between the right interface of the base 1 and the sealing socket 10, so that the sealing property between the base 1 and the sealing socket 10 is enhanced;

the end of the cable 17 is sealed in the left interface of the sealing socket 10 by filling colloid, so that the sealing property between the left interface of the sealing socket 10 and the cable 17 is enhanced;

the right ends of the conductive sheet body 5 and the stable compensation piece 3 are connected with a conditioning circuit unit 9 through a lead, and the right end of the conditioning circuit unit 9 is connected with a cable 17 through a lead;

the working principle of the utility model is as follows:

the sensing film body 7 is provided with a mounting threaded hole, the base 1 is provided with three mounting holes, the sensing film body 7 and the base 1 are connected and welded by threads, and an external mechanical structure can realize the pulling and pressing of external force on the sensor through the mounting connection with the mounting threaded hole and the three mounting holes, so that the dynamic test functions of the force sensor in the pulling direction and the pressure direction are realized;

in electrical property, the positive piezoelectric effect of the piezoelectric crystal plate is utilized to convert the sensed external force into electric charge, and then an internal conditioning circuit unit 9 is used to convert an electric charge signal into a voltage signal so as to support a display or recording instrument to directly read the amplitude and frequency change characteristics of the measured force;

by means of the compression nut 11, the cable 17 is extruded, fixed and sealed by the sealing sleeve 15, the gasket 14, the wire clamp 16 and the rubber ring 12, the sealing material adopts the sealing sleeve 15, the contact surface between the sealing socket 10 and the cable 17 is increased, and the cable 17 is sealed more compactly;

the base 1 is in threaded connection with the sealing socket 10 and the sensing membrane body 7, the first sealing element 8 and the second sealing element 18 which are placed between the two sealing elements are extruded, the sealing of a welding sealing weak link is enhanced, a cable 17 wire end in an interface inner cavity on the left side of the sealing socket 10 is filled with filling glue, and the sealing of a cable outgoing line is enhanced;

consequently this practicality on the one hand satisfies when drawing and pressing two direction power dynamic test function, has simplified frock and simple to operate, and on the other hand has improved the leakproofness of sensor, satisfies the experimental requirement under the trade deep water environment such as scientific research.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification 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 should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two or more elements or components, and those skilled in the art will understand the specific meaning of the above terms in the present invention specifically.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A piezoelectric force transducer comprising a base (1), characterized in that: an electrical function adjusting bush (2) is installed on the left side of the bottom in the base (1), a stable compensation part (3) is placed on the right side of the electrical function adjusting bush (2), a crystal piece I (4) is placed on the stable compensation part (3), a conductive sheet body (5) is placed on the upper end of the crystal piece I (4), a crystal piece II (6) is placed on the upper end of the conductive sheet body (5), a sensing film body (7) is connected to the upper end of the base (1) in an internal thread mode, a conditioning circuit unit (9) is installed in an interface on the right side of the base (1), a sealing socket (10) is connected to the right end of the base in an internal thread mode, a cable (17) is inserted into the sealing socket (10), and a sealing sleeve (15), a gasket (14), a limiting sleeve (13), a rubber ring (12) and a compression nut (11) are sequentially sleeved on the cable (17) from left to right, the sealing sleeve (15), the gasket (14), the limiting sleeve (13), the rubber ring (12) and the compression nut (11) are all inserted into the right end of the sealing socket (10), and the compression nut (11) is in threaded connection with the sealing socket (10).

2. The piezoelectric force transducer of claim 1, wherein: the sensing membrane body (7) is connected with a connecting gap at the upper end of the base (1) through laser welding, and the sealing socket (10) is connected with a connecting gap at the right end of the base (1) through laser welding.

3. The piezoelectric force transducer of claim 1, wherein: and a first sealing element (8) is arranged between the base (1) and the sensing membrane body (7).

4. The piezoelectric force transducer of claim 1, wherein: a line card (16) is arranged in the limiting sleeve (13).

5. The piezoelectric force transducer of claim 1, wherein: and a second sealing element (18) is arranged between the right side interface of the base (1) and the sealing socket (10).

6. The piezoelectric force transducer of claim 1, wherein: and the connector at the left side of the sealing socket (10) is internally filled with the cable head of the cable (17) through a filling colloid.

7. The piezoelectric force transducer of claim 1, wherein: the right ends of the conductive sheet body (5) and the stable compensation piece (3) are connected with a conditioning circuit unit (9) through wires, and the right end of the conditioning circuit unit (9) is connected with the cable (17) through wires.

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