The tension sensor is based on the principle that the elastic body (elastic component, sensitive beam) is elastically deformed under the action of an external force, so that the resistance strain gauge (conversion component) attached to the surface thereof is also deformed together, and after the strain gauge is deformed, its The resistance value will change (increase or decrease), and then the corresponding measurement circuit converts this resistance change into an electrical signal (voltage or current), thereby completing the process of converting the external force into an electrical signal.
Considering the strategic acceleration of the place of use and the influence of air buoyancy on the conversion, the performance indicators of the tension sensor mainly include linear error, hysteresis error, repeatability error, creep, zero temperature characteristic and sensitivity temperature characteristic.
The tension sensor has the advantages of high precision, wide measuring range, long service life, simple structure, good frequency response characteristics, can work under severe conditions, and is easy to realize miniaturization, integration and variety. Its shortcoming is that it has large nonlinearity for large strain and weak output signal, but certain compensation measures can be taken. Therefore it is widely used in automatic test and control technology
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