What are the types of resistance strain gauges? Is there anything I need to pay attention to when using resistance strain gauges?
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What are the types of resistance strain gauges? Is there anything I need to pay attention to when using resistance strain gauges?

Posted Date: 2024-02-05

What are the types of resistance strain gauges? Is there anything I need to pay attention to when using resistance strain gauges?

Resistance strain gauge is a commonly used sensor element for measuring strain and is widely used in machinery, engineering, aerospace and other fields. According to different materials and structures, resistance strain gauges can be divided into silicon strain gauges, metal strain gauges and carbon film strain gauges. When using resistance strain gauges, you need to pay attention to the following aspects.

First, choose the appropriate type. Depending on the specific strain measurement needs, it is crucial to select the appropriate type of resistance strain gauge. Silicon strain gauges are mainly used for high-precision measurement, with high linear range and stability; metal strain gauges are suitable for measurements in high temperatures and harsh environments, and have good anti-interference capabilities; carbon film strain gauges are usually cheaper, Suitable for large-scale stress measurement, etc.

Secondly, install it correctly. When installing, it is necessary to ensure that the resistance strain gauge is consistent with the strain direction of the measured physical quantity and maintains good contact with the measured object. Use a suitable adhesive or conductive glue to secure the resistance strain gauge to the measuring point to ensure stable and reliable strain measurement.

Again, prevent overloading. Resistance strain gauges have a certain sensitivity, and overloading will cause the accuracy of the measurement results to decrease or even damage the sensor. When using the strain gauge, care should be taken to avoid exceeding its designed maximum working range and the measurement loading method should be reasonably arranged.

Plus, temperature compensation. The working performance of resistance strain gauges is greatly affected by temperature, and temperature compensation must be performed to eliminate temperature interference on measurement results. The temperature can be measured by equipping it with a temperature sensor, and the measurement results can be corrected using a temperature compensation circuit or software.

In addition, the power supply must not be interfered by high-frequency current, because the high-frequency power supply may cause the resistance strain gauge to produce abnormal output signals, causing errors in the measurement results.

When using resistance strain gauges, you also need to pay attention to the selection and calibration of instruments. Appropriate bridge instruments or data acquisition equipment should be selected to ensure the accuracy and stability of the measurement signal. At the same time, regularly check and verify the working status of the resistance strain gauge to ensure the reliability of the measurement results.

To sum up, the resistance strain gauge is an important strain measurement sensor, and we need to pay careful attention to the correct selection, installation, use and maintenance. Only by ensuring that the relevant operating procedures are strictly followed in actual use can it be fully utilized. The advantages of resistance strain gauges improve the accuracy and reliability of strain measurement.


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