Circular load sensor

Abstract

The invention relates to a circular load sensor which is provided with an upper press plate, a lower press plate and a circular metal elastic body arranged between the upper press plate and the lower press plate. The upper pressure bearing face and the lower pressure bearing face of the metal elastic body are planes and are parallel mutually, a section in the radius direction of the metal elastic body is I-shaped, and a resistance strain gauge is adhered to the middle of a vertical rib of the I shape. When the circular metal elastic body is stressed, the I-shaped vertical rib produces compressive deformation so as to enable the resistance of the strain gauge adhered to the vertical rib to change, and a test shows that the resistance change of the resistance strain gauge can conversely act on the load exerted on the circular load sensor. The different bearing capacity requirements, the low-height requirement and different testing accuracy requirements of the circular load sensor can be met through different combination of the circular metal elastic bodies different in circular ring diameter and the I-shaped vertical ribs different in height and thickness. The circular load sensor is mainly of a vertical or horizontal rotation structure and greatly facilitates machining and manufacture, and the manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to a load sensor. Background technique [0002] At present, the load sensors used to measure large loads mainly include cylindrical load sensors, spoke load sensors, and a ring-shaped load sensor that can be connected. The columnar load cell has a high structural height, which cannot be used in many occasions, and its cost is high; the spoke load cell is complex to process, and although the structural height is low, compared with the columnar load cell with the same bearing capacity, its manufacturing cost is higher ; The cross-section shape of the existing ring-shaped connectable load sensor that feels deformation is a conical shape that is symmetrical up and down, and the upper and lower pressure plates that are in contact with it also have a corresponding cone surface. Under the pressure of the upper and lower pressure plates, the elastic body will produce tensile deformation in the hoop direction, and the load acting on it wi...

AI Technical Summary

Problems solved by technology

The columnar load cell has a high structural height, which cannot be used in many occasions, and its cost is high; the spoke load cell is complex to process, and although the structural height is low, compared with the columnar load cell with the same bearing capacity, its manufacturing cost is higher ; The cross-section shape of the existing ring-shaped connectable load sensor that feels deformation is a conical shape that is symmetrical up and down, and the upper and lower pressure plates that are in contact with it also have a corresponding cone surface. Under the pressure of the upper and lower pressure plates, the elastic body will produce tensile deformation in the hoop direction, and the load acting on it will be tested by testing the combination of tensile and compression deformation of the annular conical elastic body

The ring-shaped elastic body and the tapered surfaces of the upper and lower pressure plates are required to be in complete contact, and the matching accuracy is very high. It is relatively difficult to process the tapered surface. On the other hand, due to the setting of the tapered surface, the structural height and weight of the sensor are increased. , the manufacturing cost also increases

Images