CN2463813Y

CN2463813Y - Elastomer of strain-type force cell

Info

Publication number: CN2463813Y
Application number: CN 01211336
Authority: CN
Inventors: 陈卫东; 陈国栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-15
Filing date: 2001-01-15
Publication date: 2001-12-05
Anticipated expiration: 2011-01-15

Abstract

The utility model relates to a strain gauge force testing sensor elastic body based on a multiple parallel bent beam bridge type element, belonging to a supporting structure used on force testing sensors, and the utility model is especially suitable for being used on belt material tension sensors or force testing and weighing sensors. The utility model is characterized in that the elastic body has a bridge type structure which is composed of a center island positioned in the middle part, a supporting seat, a plurality of symmetrical and parallel bent beams positioned on the both sides of the center island. The goal is to solve the problems that the existing load capacity and the overload capacity of shear beam bridge type sensors are low, anti-lateral force and bending moment ability are poor, etc. The utility model can also be used for large tonnage crane scales, various high-accuracy weighing sensors, weight belts, railway sacles, etc.

Description

A kind of elastic body of strain-type force sensor

The utility model belongs to a kind of supporting construction that is applied on the force cell, is specially adapted on strap tension sensor or the load and weighing cell.

At present, the elastic body of the central-line shear angle beam bridge formula sensor of one of force cell of generally using of weighing and force measurement has two kinds of citation forms: split combination bridge-type and whole bridge-type.Ultimate principle is the shear beam bridge architecture, and wherein whole shear beam bridge-type is than the good stability of split composite bridge formula.But there is following major defect in this type of sensor: load-bearing capacity low (generally can only reach 50 tons), and lateral force resistance and moment of flexure ability are lower, and overload capacity is poor.The main reference document:

1, Shi Hanqian, Song Wenmin, electronic scale technology, Beijing: China Measuring Press, 1991,9;

2, Tao Baoqi, Wang Ni, resistance strain type sensor, Beijing: National Defense Industry Press, 1993,8;

3, Yuan Xiguang, the sensor technology handbook, Beijing: National Defense Industry Press, 1986,12:

4, Jinzhong Electronic Balancer Co., Ltd., Jinan, 95 sensor new product monographs;

5, Chinese utility model patent: 90223507.9, CN2087781U;

6, Chinese invention patent: 92102476.2, CN1076779A;

7, Chinese utility model patent: 97212566.3;

At problem set forth above, the utility model provides a kind of elastic body of strain-type force sensor, and it is low that its purpose is to solve load-bearing capacity, overload capacity that the shear beam bridge type magnetic sensor exists, problems such as lateral force resistance and moment of flexure ability.

The utility model comes to be realized by the following technical programs:

A kind of elastic body of strain-type force sensor is characterized in that: this elastic body is made up of the central island and the supporting seat bottom it that are provided with in the middle, and a bridge architecture that constitutes by a plurality of parallel bent beams between central island and the supporting seat connects.

Bent beam is arranged on the two bottom sides and the parallel symmetry of central island.

The width of each bent beam and the ratio of thickness are more than or equal to 3.

The quantity that is positioned at the parallel bent beam of each side of central island is more than or equal to 3.

Advantage of the present utility model and effect:

Technique effect with the force cell of elastic body manufacturing of the present utility model is: non-linear, lag behind, do not repeat the end all＜0.05%FS, improve measuring accuracy, overload capacity, bending resistance square ability and overload capacity all are better than present shear beam force cell.

Can be made into various forms of force cells with elastic body of the present utility model, being applicable to different dynamometry environment and purposes, as be used for the measurement of strap tension, large-scale crane claims that various high-precision weighing sensors, belt claim that track claims etc.

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is an another kind of structural representation of the present utility model;

Accompanying drawing 3 is the front view of accompanying drawing 1;

Accompanying drawing 4 is the A-A sectional view of accompanying drawing 3.

The utility model is specifically described by embodiment below in conjunction with accompanying drawing:

For achieving the above object, the technical scheme that the utility model is taked is: the elastic body that becomes a kind of how parallel bent beam bridge-type force cell with metallic elastic materials processing, structure such as Fig. 1, shown in 2, this kind elastomer structure is by base for supporting 2, bear by the central island 1 of dynamometry and a plurality of parallel bent beam 3.1,3.2 ... 3.n (n more than or equal to 3 positive integer) forms, whole elastic body is a symmetrical structure, it is characterized in that the elastic strain beam is bent beam, be that the width of beam and the ratio of thickness are more than or equal to 3, many beams are parallel to each other and be the center left-right symmetric with central island 1, many parallel girders are perpendicular to by the direction of dynamometry, and the number of beam is more than or equal to 3 (each side).

The principle of technical solutions of the utility model is (referring to accompanying drawing 1,2): the time spent of doing that is subjected to the power of pressing to (or pulling to power) F when the elastic body of force cell, (central island 1 is last bearing position, supporting seat 2 is following bearing position), a plurality of parallel bent beams 3.1,3.2,3.n deform simultaneously, the foil gauge of being pasted on many parallel girders 4 is distortion thereupon also, the resistance value of foil gauge 4 changes, form resistance bridge (with constant pressure source or constant current source excitation) out of trim by sticking on the elastic bending beam foil gauge on the diverse location 4, output signal is directly proportional with the size of acting force, thereby measures the size of power.

For reaching the raising load-bearing capacity, can adopt the force method of the parallel bent beam quantity of suitable increase, should guarantee that elastic beam is bent beam (being that the width of beam and the ratio of thickness are more than or equal to 3), rather than shear beam.

The strong principle of this kind sensor elastomer lateral force resistance ability is: when sensor was subjected to side force, the arm resistance of forming resistance bridge all took place to change in the same way, thereby makes the output of electric bridge constant.

Claims

1, a kind of elastic body of strain-type force sensor, it is characterized in that: this elastic body is made up of the central island (1) and the supporting seat (2) bottom it that are provided with in the middle, and a bridge architecture that constitutes by a plurality of parallel bent beams (3) between central island (1) and the supporting seat (2) connects.

2, the elastic body of strain-type force sensor according to claim 1 is characterized in that: bent beam (3) is arranged on the two bottom sides and the parallel symmetry of central island (1).

3, the elastic body of strain-type force sensor according to claim 1 is characterized in that: the width of each bent beam (3) and the ratio of thickness are more than or equal to 3.

4, the elastic body of strain-type force sensor according to claim 1 is characterized in that: the quantity that is positioned at the parallel bent beam of each side of central island (1) (3) is more than or equal to 3.