CN214843723U

CN214843723U - Force measuring sensor

Info

Publication number: CN214843723U
Application number: CN202121309753.2U
Authority: CN
Inventors: 徐天宝; 徐光源
Original assignee: PUTIAN LITIAN MEASURING AND CONTROLLING TECHNOLOGY CO LTD
Current assignee: PUTIAN LITIAN MEASURING AND CONTROLLING TECHNOLOGY CO LTD
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-11-23
Anticipated expiration: 2031-06-11

Abstract

The utility model discloses a force cell sensor, it relates to sensor technical field. The strain gauge comprises a base body, wherein the base body comprises a first area, a second area and a third area, the first area, the second area and the third area are arranged in parallel, strain gauges are arranged on two sides of the second area, the second area is located between the first area and the third area, a first U-shaped groove is formed between the first area and the second area, a second U-shaped groove is formed between the second area and the third area, and limiting protection devices for preventing external force from exceeding the range of the sensor and being too large in deformation are respectively arranged in the first U-shaped groove and the second U-shaped groove. After the technical scheme is adopted, the beneficial effects of the utility model are that: prevent to warp excessively, and can prevent that the stress position from taking place the skew, avoid measured data to cause great error, be favorable to subsequent data analysis, still have the function of reporting to the police when surpassing the range, make the staff in time take counter-measure, improved its waterproof performance, make it more be fit for using in moist environment, the practicality is strong.

Description

Force measuring sensor

Technical Field

The utility model relates to a sensor technical field, concretely relates to force cell sensor.

Background

A device for converting the magnitude of the force into an associated electrical signal by the load cell. Forces are the direct cause of the change in motion of the material. The force sensor can detect mechanical quantities such as tension, pressure, weight, torque, internal stress and strain. The specific devices comprise metal strain gauges, pressure sensors and the like, and become indispensable core components in power equipment, engineering machinery, various machine tools and industrial automation systems.

However, some existing load cells have some defects in the using process: firstly, when the external force exceeds the measuring range of the sensor, the deformation of the sensor is large, and even the deviation of a stress position can occur, so that the measured data of the sensor has large errors, and the subsequent data analysis is not facilitated; secondly, when the measuring range of the sensor exceeds the range, the user cannot be informed at the first time without a warning function, and cannot take countermeasures in time; thirdly, the waterproof performance is poor and is not suitable for use in a humid working environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a force cell sensor and prevent to warp excessively, and can prevent that stress position from taking place the skew, avoid measured data to cause great error, be favorable to subsequent data analysis, still have the function of reporting to the police when surpassing the range, make the staff in time take counter-measure, still improved its waterproof performance at last, make it more be fit for using in moist environment, the practicality is strong.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the strain gauge comprises a base body, wherein the base body comprises a first area, a second area and a third area, the first area, the second area and the third area are arranged in parallel, strain gauges are arranged on two sides of the second area, the second area is positioned between the first area and the third area, a first U-shaped groove is formed between the first area and the second area, a second U-shaped groove is formed between the second area and the third area, and limiting protection devices for preventing the external force from deforming excessively when exceeding the range of the sensor are respectively arranged in the first U-shaped groove and the second U-shaped groove;

the limiting protection device comprises a limiting rod, one end of the limiting rod is fixedly connected with the side wall of the second area, the other end of the limiting rod 2 is inserted into a movable groove formed in the first area or the third area, the limiting rod is located at one end of the movable groove and is fixedly connected with a limiting block, a button battery is embedded in the limiting block, the outer walls of two sides of the limiting block are respectively provided with a distance sensor, the limiting block is fixedly connected with a controller, and the controller is electrically connected with a warning horn arranged on the second area;

and one side of the movable groove, which is close to the second area, is provided with a protruding edge.

The basal body is in an S-shaped structure.

The first area is provided with a plurality of mounting holes.

The second region is provided with a hollow circuit board installation cavity, the circuit board is installed in the circuit board installation cavity, and waterproof sealing silica gel for sealing the circuit board installation cavity is arranged outside the hollow circuit board installation cavity.

And the third area is provided with a threaded hole for connecting a measured object.

And the limiting block and the distance sensor are welded and fixed with a spring on the same side surface.

The button cell respectively with distance sensor, controller, warning loudspeaker electric connection.

After adopting above-mentioned technical scheme, compare in prior art and have following beneficial effect:

1. the arrangement of the limiting rod, the limiting block and the like can generate a protection effect when the external force exceeds the measuring range of the sensor, prevent the sensor from generating large deformation, prevent the stress position from deviating, avoid large errors caused by measured data and facilitate subsequent data analysis;

2. through the arrangement of the distance sensor, the controller, the button cell and the like, an alarm can be given out after the sensor exceeds the measuring range, and a worker is reminded to take corresponding measures in time;

3. the waterproof performance of the sensor is improved through the arrangement of the waterproof sealing silica gel, so that the sensor is more suitable for being used in a humid environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an enlarged view of a portion a corresponding to fig. 1.

Description of reference numerals: the waterproof sealing structure comprises a base body 1, a first area 11, a mounting hole 111, a second area 12, waterproof sealing silica gel 121, a strain gauge 122, a third area 13, a threaded hole 131, a first U-shaped groove 14, a second U-shaped groove 15, a limiting rod 2, a limiting block 21, a button battery 211, a distance sensor 212, a controller 213, a spring 214, a control horn 215, a movable groove 22 and a protruding edge 221.

Detailed Description

Referring to fig. 1 to 2, the technical solution adopted by the present embodiment is: the sensor comprises a substrate 1, wherein the substrate 1 comprises a first area 11, a second area 12 and a third area 13, the first area 11, the second area 12 and the third area 13 are arranged in parallel, strain gauges 122 are arranged on two sides of the first area 11 and the second area 13, the second area 12 is positioned between the first area 11 and the third area 13, a first U-shaped groove 14 is formed between the first area 11 and the second area 12, a second U-shaped groove 15 is formed between the second area 12 and the third area 13, and limiting protection devices for preventing the external force from excessively deforming when exceeding the range of the sensor are respectively arranged in the first U-shaped groove 14 and the second U-shaped groove 15;

the limiting protection device comprises a limiting rod 2, one end of the limiting rod 2 is fixedly connected with the side wall of the second area 12, the other end of the limiting rod 2 is inserted into a movable groove 22 formed in the first area 11 or the third area 13, the limiting rod 2 is positioned at one end of the movable groove 22 and is fixedly connected with a limiting block 21, a button battery 211 is embedded in the limiting block 21, the outer walls of the two sides of the limiting block 21 are respectively provided with a distance sensor 212, the limiting block 21 is fixedly connected with a controller 213, and the controller 213 is electrically connected with a warning horn 215 arranged on the second area 12;

the side of the movable slot 22 close to the second region 12 is provided with a protruding edge 221.

The substrate 1 is in an S-shaped structure.

The first region 11 is provided with a plurality of mounting holes 111.

The second region 12 is provided with a hollow circuit board installation cavity, the circuit board is installed in the circuit board installation cavity, and waterproof sealing silica gel 121 for sealing the circuit board installation cavity is arranged outside the hollow circuit board installation cavity.

The third area 13 is provided with a threaded hole 131 for connecting a measured object.

And the limiting block 21 and the distance sensor 212 are welded and fixed with a spring 214 on the same side surface.

The button cell 211 is electrically connected to the distance sensor 212, the controller 213 and the warning speaker 215.

The utility model discloses a theory of operation: during the use, when external force exceeded the range of sensor, gag lever post and stopper removed to both sides, when distance sensor detected the inner wall teaching near apart from the activity groove, the controller can control warning loudspeaker and produce the warning, makes the spring produce the extrusion along with the increase of power, after too big messenger's spring compression is complete when power, limiting plate and gag lever post have played spacing effect, prevent that the sensor from continuing to produce and warp.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A load cell, characterized by: the strain gauge comprises a base body, wherein the base body comprises a first area, a second area and a third area, the first area, the second area and the third area are arranged in parallel, strain gauges are arranged on two sides of the second area, the second area is positioned between the first area and the third area, a first U-shaped groove is formed between the first area and the second area, a second U-shaped groove is formed between the second area and the third area, and limiting protection devices for preventing the external force from deforming excessively when exceeding the range of the sensor are respectively arranged in the first U-shaped groove and the second U-shaped groove;

the limiting protection device comprises a limiting rod, one end of the limiting rod is fixedly connected to the side wall of the second area, the other end of the limiting rod is inserted into a movable groove formed in the first area or the third area, the limiting rod is located at one end of the movable groove and is fixedly connected with a limiting block, a button battery is embedded in the limiting block, distance sensors are respectively arranged on the outer walls of the two sides of the limiting block, a controller is fixedly connected to the limiting block, and the controller is electrically connected with a warning horn arranged on the second area;

2. A load cell according to claim 1, wherein: the basal body is in an S-shaped structure.

3. A load cell according to claim 1, wherein: the first area is provided with a plurality of mounting holes.

4. A load cell according to claim 1, wherein: the second region is provided with a hollow circuit board installation cavity, the circuit board is installed in the circuit board installation cavity, and waterproof sealing silica gel for sealing the circuit board installation cavity is arranged outside the hollow circuit board installation cavity.

5. A load cell according to claim 1, wherein: and the third area is provided with a threaded hole for connecting a measured object.

6. A load cell according to claim 1, wherein: and the limiting block and the distance sensor are welded and fixed with a spring on the same side surface.

7. A load cell according to claim 1, wherein: the button cell respectively with distance sensor, controller, warning loudspeaker electric connection.