Strain gauge sensor, method and measuring device for obtaining high sensitivity using it

Abstract

The invention belongs to the technical field of sensors and particularly relates to a strain sensor, a method using the strain sensor to acquire high sensitivity and a strain measuring device comprising the strain sensor. The strain sensor comprises a flaky carrier and is characterized in that a first sensitive grid and a second sensitive grid are respectively arranged on two sides of the flaky carrier, and the projections of the first sensitive grid and the second sensitive grid on the flaky carrier do not coincide with each other. The method can double the sensitivity of the sensor and is convenient to operate. The strain measuring device has the advantages that the strain measuring device is compact in structure by using a FPC connector to connect with the strain sensor, the strain measuring device is simple to operate, convenient to use and capable of saving cost, and plug type electric connection with an external signal receiving device can be formed conveniently.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a strain gauge sensor, a method for obtaining high sensitivity by using the sensor, and a measuring device. Background technique [0002] With the rapid development of science and technology, human beings have entered the ever-changing information society. Scientific research activities and industrial production activities are closely dependent on the mining, acquisition, transmission and processing of information resources. As the central link of information acquisition and conversion, sensors are It is one of the frontier research and application fields of information science and one of the basic technologies for realizing informatization. Similarly, as an important sensory organ of the current Internet of Things, sensors can perceive, detect, collect and obtain various forms of information of target objects. , is also one of the most basic links. [0003] Sensor ...

AI Technical Summary

Problems solved by technology

At present, there are two main methods to improve the sensitivity of the sensor: one method is to increase the sensitivity by selecting a semiconductor sensor with a high sensitivity coefficient. The disadvantage of this method is that the price of the semiconductor is high, and the temperature drift of the sensor supported by the semiconductor is large , not suitable for applications requiring high measurement accuracy; another method is to increase the local strain output under the same force by changing the structural design of the measured component. Stress concentration and strength reduction lead to premature fatigue damage of the measured component during application, and the large size of the sensor is not conducive to installation in a small space, etc.

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