Force measurement method for switching external force measurement into internal measurement and force measurement device adopted by same

Abstract

The invention discloses a force measurement method for switching external force measurement into internal measurement and a force measurement device adopted by the same.The force measurement device comprises a top plate, a base plate, a plurality of replaceable elastic force-bearing rods and a force measurement sensor, wherein the replaceable elastic force-bearing rods are evenly and vertically distributed between the top plate and the base plate, through holes are formed in the same side of the top plate and the base plate, the tail end of the force measurement sensor is connected with a first screw, the other end of the first screw is embedded into the through hole formed in the base plate and is fixed by using two locking nuts, a second screw is connected to the top end of the force measurement sensor, and the other end of the second screw is embedded into the through hole formed in the top plate and is fixed by using two locking nuts.The force measurement device utilizes the principle that an internal force mainly relies on the rigidity distribution of members under the external load effect, switches the external load measurement into structural internal force measurement and widens the using range of an existing force measurement sensor.Compared with the prior art, the force measurement device is simple in manufacturing and processing, and the force measurement method is simple and easy and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of engineering, in particular to a force measuring method and a force measuring device for converting external force measurement into internal force measurement. Background technique [0002] The load cell usually converts the force into an electrical signal proportional to the force, which is convenient to use. Among all force sensors, strain gauge sensors are the most widely used, and can be applied to the measurement of dynamic and static forces from very small to very large, with high measurement accuracy. Load cells, especially cylindrical strain sensors, are widely used in engineering actual load measurement. The external force and deformation they bear within the elastic range are proportional to each other. However, the elasticity of any force-measuring element is relative, generally only within a certain range. If the elastic limit is exceeded, the stress-strain relationship is a curve. Therefore, ...

AI Technical Summary

Problems solved by technology

Load cells, especially cylindrical strain sensors, are widely used in engineering actual load measurement. The external force and deformation they bear within the elastic range are proportional to each other. However, the elasticity of any force-measuring element is relative, generally only within a certain range. If the elastic limit is exceeded, the stress-strain relationship is a curve. Therefore, any load cell has a certain range. Although there is electrical signal feedback within a certain range beyond this range, the test accuracy cannot be satisfied, and effective testing cannot be carried out. There may even be cases where the test sensor is damaged

Due to the diversity of actual engineering loads, sensors with different ranges are required to accurately measure different external loads. For this reason, Chinese patent application number: 201020544369.6 has developed a combined sensor force measuring device, which uses three standard sensors in parallel. The method can well solve the problem of difficult large-scale detection

However, this method still requires multiple small-range sensors to be connected in parallel

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