Hits:Updated:2020-05-12【Print】
Tensile testing machine This test equipment has a very important component-the sensor, when we test the tensile, bending, compression and shear of the material, we can't do without the support of the sensor. The accuracy of the testing machine mainly depends on the accuracy of the control part and the sensitivity of the sensor. At present, there are many types of sensors on the tensile testing machine on the market, such as capacitive load cells, electromagnetic balance sensors, and piezoelectric load cells. The difference between each added product is very large, what should we pay attention to when we buy the sensor of the test machine? How can I buy a good product? What performance does it need? The following editor will tell you about your experience in this regard.
1. The accuracy of the sensor:
The accuracy of the sensor is its most important performance index, because it is directly related to the accuracy of the test results. In contrast, the higher the accuracy of the tester's sensor, the more expensive it is. When we choose the sensor of the test machine, it is necessary to meet the accuracy requirements of the measurement system according to the actual situation of the sensor.
2. The linear range of the sensor:
Linear range refers to the range in which the output is proportional to the input. In theory, the linear range of the sensor of the test machine is relatively stable. The wider the linear range of the sensor of the testing machine, the larger the range, and the measurement accuracy can be guaranteed. However, it is impossible for any test machine sensor to guarantee its absolute linearity. When the required measurement accuracy is relatively low, the tester sensor with small nonlinear error can be regarded as linear, which brings great Bento.
3. The stability of the sensor:
If the sensor of a tensile testing machine can still guarantee its constant performance after being used for a period of time, its stability is very good. In general, there are two main factors that affect the long-term stability of the test machine sensor: one is its own structure; the second is the working environment of the test machine sensor. Therefore, the sensor of the testing machine should have strong environmental adaptability.
4. Frequency characteristics of the sensor:
The frequency characteristic of the sensor of the test machine directly determines the frequency range of the material being measured. Must meet the requirements without distortion within an allowable frequency range. In fact, the response of the sensor of the test machine will have a certain delay, in short, the shorter the delay time, the better.
5. The flexibility of the sensor:
In the linear range of the tensile testing machine sensor, everyone hopes that the higher the flexibility of the tensile testing machine sensor, the better. Because the higher the degree of flexibility, the greater the value of the output signal corresponding to the measured change, which is beneficial to signal processing. At the same time, we must also note that the higher the flexibility of the tensile testing machine sensor, the greater the impact of external noise. Therefore, when selecting the sensor of the tensile testing machine, the compatibility of the flexibility, the amount, and the external interference should be guaranteed.
The above is the summary of the five aspects that the editor needs to pay attention to when purchasing the sensor of the test machine. I hope it will be helpful to everyone. If you have more questions, please consult us. Sansi Eternal focuses on the research and development, production, agency and sales of testing instruments and test equipment for reliability, reliability, materials science and life. It is very professional in testing equipment such as testing machine.
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