CN215893845U

CN215893845U - Gasket type sensor

Info

Publication number: CN215893845U
Application number: CN202022922283.9U
Authority: CN
Inventors: 王春国; 周争云
Original assignee: SHENZHEN LIHE XINYUAN INTELLIGENT TECHNOLOGY CO LTD
Current assignee: SHENZHEN LIHE XINYUAN INTELLIGENT TECHNOLOGY CO LTD
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2022-02-22
Anticipated expiration: 2030-12-09

Abstract

The utility model provides a shim sensor comprising: the middle part of the elastic gasket is provided with a cantilever beam; the strain gauge is arranged on the cantilever beam; and the lead is connected with the strain gauge. The utility model makes a metal gasket into a sensor, does not increase the structural height, does not influence the appearance of a tested product, and has simple structure and low cost. Due to the integral forming, the design is ingenious, and the sensitivity and the stability of the sensor in application can be effectively enhanced.

Description

Gasket type sensor

Technical Field

The present invention relates to a gravity sensor, and more particularly, to a sheet-type gravity sensor.

Background

A gravity sensor, also called as a gravity sensor, belongs to the novel sensor technology, and adopts an elastic sensing element to manufacture a cantilever type displacement device and an energy storage spring manufactured by the elastic sensing element to drive an electric contact so as to complete the conversion from the gravity change to the electric signal. Gravity sensors operate on the principle of the piezoelectric effect. The so-called piezoelectric effect is "the phenomenon that external force applied to the crystal for heteropolar crystals without symmetry centers changes the polarization state of the crystal in addition to deforming the crystal, and establishes an electric field inside the crystal, and the medium is polarized due to mechanical force action is called positive piezoelectric effect". The gravity sensor utilizes the characteristic that the crystal is deformed due to acceleration in the gravity sensor. Since this deformation generates a voltage, the acceleration can be converted into a voltage output by simply calculating the relationship between the generated voltage and the applied acceleration. There are, of course, many other methods to make acceleration sensors, such as capacitance effect, thermal bubble effect, and optical effect, but the most basic principle is that some medium is deformed due to acceleration, and the deformation is measured and converted into voltage output by related circuits.

Heretofore, the gravity sensors on the market mainly include S-type, cantilever type, spoke type, plate ring type, diaphragm type, bridge type, column cylinder type, and the like. The sensors occupy larger installation space, change the appearance of a tested product to a great extent, and have relatively complex structure and relatively high cost.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a novel shim sensor.

In order to achieve the above object, the present invention provides a shim sensor including:

the middle part of the elastic gasket is provided with a cantilever beam;

the strain gauge is arranged on the cantilever beam;

and the lead is connected with the strain gauge.

Preferably, the strain gauge further comprises a protective cover body arranged on the strain gauge for protecting the strain gauge.

According to one aspect of the utility model, the resilient pad is a circular sheet.

According to one aspect of the utility model, the cantilever beam comprises a head end and a tail end, the head end is used for connecting with the elastic pad, and the tail end is arranged at a certain distance from the elastic pad, so that the tail end can move up and down in the middle of the elastic pad.

According to one aspect of the utility model, the cantilever beam is integrally formed with the resilient pad.

According to one aspect of the utility model, the resilient pad is centrally provided with an opening, the resilient pad forming the cantilever beam at the portion of the tongue around which the opening is located.

According to one aspect of the utility model, the elastic gasket is provided with a U-shaped hollow in the middle, and the cantilever beam is in a rectangular tongue shape.

According to one aspect of the utility model, the strain gauge is provided at the trailing end of the cantilever beam.

According to one aspect of the utility model, the elastic pad and the cantilever beam are made of 65Mn spring steel. The strain linearity of the 65Mn spring steel after stress is good.

According to one aspect of the utility model, the protective enclosure is an gel.

The utility model has the technical effects that:

the utility model makes a metal gasket into a sensor, does not increase the structural height, does not influence the appearance of a tested product, and has simple structure and low cost. Due to the integral forming, the design is ingenious, and the sensitivity and the stability of the sensor in application can be effectively enhanced.

Drawings

FIG. 1 is a schematic perspective view of one embodiment of the present invention;

FIG. 2 is a schematic top view of one embodiment of the present invention;

fig. 3 is a schematic top view of another embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

Various embodiments according to the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of an embodiment of the shim sensor of the present invention, and fig. 2 is a schematic top view of an embodiment of the shim sensor of the present invention. The shim sensor 1 shown in fig. 1 and 2 can be used in a gravity sensing device. The method comprises the following steps: elastomeric pad 11, strain gauge 12 and wire 13. The middle part of the elastic gasket is provided with a cantilever beam 14, and the cantilever beam 14 belongs to one part of the elastic gasket and is integrally formed with the elastic gasket. Material is removed from the middle of the resilient pad to form a shaped cutout 15, so that the resilient pad 11 forms a cantilever beam at the tab portion 14 around which the cutout is located. The cantilever beam 14 includes a head end 141 and a tail end 142, the head end 141 is connected to the elastic pad, and the tail end 142 is spaced from the elastic pad such that the tail end 142 can move up and down in the middle of the elastic pad 11. The distance between the tail end 142 and the elastic pad 11 can be adjusted according to the size of the applied device, the size of the elastic pad and the size of the strain gauge, which can be realized by those skilled in the art according to the description of the present invention and in combination with the prior art. The strain gage 12 is mounted to the trailing end 141 of the cantilever beam 14. Wires 13 are connected to strain gauges 12. The strain gauge 12 may be fixed to the surface of the elastic pad 11 by means of adhesion, and the lead wire 13 may be welded to the strain gauge 12. A protective cover 16 is also provided on the strain gauge 12 to protect the strain gauge 12. Strain gage 12 is not shown in fig. 1, and strain gage 12 is enclosed in a protective cover 16. Fig. 2 shows the protective cover 16 partially in section. The protective cover 16 may be silicone, and encloses the strain gauges and/or the connections of the strain gauges to the leads on the cantilever beam 14. Preferably, the elastic pad 11 is a circular sheet. In this embodiment, the resilient pad 11 has a U-shaped hollow 15 in the middle, and the cantilever beam 14 has a rectangular tongue shape. When the cantilever beam 14 in the middle 1 of the elastic pad 11 is stressed, it will deform, and thus the strain gauge 12 will be driven to deform, the strain gauge 12 will output an electrical signal to an external control module through the lead 3, and the stress can be further calculated by the control module.

Fig. 3 is a schematic top view of another embodiment of a shim sensor according to the present invention, and fig. 3 shows boot 16 in partial cross-section. A different shape of the cantilever beam 4 is shown. This embodiment is more suitable for the case where the strain gauge is wide. In addition to this, the cantilever beam can also be made in other shapes.

While the foregoing disclosure shows illustrative embodiments of the utility model, it should be noted that various changes and modifications could be made herein without departing from the scope of the utility model as defined by the appended claims. Furthermore, although elements of the utility model may be described or claimed in the singular, the plural is contemplated unless limitation to a single element is explicitly stated.

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

1. A shim sensor, comprising:

the middle part of the elastic gasket is provided with a cantilever beam;

the strain gauge is arranged on the cantilever beam;

the lead is connected with the strain gauge;

the middle of the elastic gasket is provided with a U-shaped hollow, the elastic gasket forms the cantilever beam at the projecting tongue part surrounded by the hollow, and the cantilever beam is in a rectangular projecting tongue shape; the cantilever beam comprises a head end and a tail end, the head end is used for being connected with the elastic gasket, a certain distance is reserved between the tail end and the elastic gasket, the tail end can move up and down in the middle of the elastic gasket, and the strain gauge is arranged at the tail end of the cantilever beam.

2. The shim sensor according to claim 1, further comprising a protective cover disposed over the strain gage for protecting the strain gage.

3. A shim sensor according to claim 1 or 2, wherein the resilient shim is a circular sheet.

4. A shim sensor according to claim 1, wherein the cantilever beam is integrally formed with the resilient shim.

5. A shim sensor according to claim 1, wherein the resilience of the resilient shim and the cantilever beam is 65Mn spring steel.

6. The shim sensor according to claim 2, wherein the protective enclosure is gel.