Determine sensor performance and improve measurement accuracy
The main function of the sensor calibration tester is to determine the performance index of the sensor, improve the measurement accuracy, and ensure the reliability and stability of the sensor under different environmental conditions.
Definition and purpose of sensor calibration
Sensor calibration refers to using some standard quantity or standard instrument to scale the sensor's quantity value under the premise of clear input-output transformation relationship. The purpose of calibration is to determine the static characteristics of the sensor, such as linearity, sensitivity, hysteresis and repeatability, so as to ensure that the sensor can accurately measure and perceive the target physical quantity .
Method and process of sensor calibration
Sensor calibration usually includes two methods: static calibration and dynamic calibration:
Static calibration : Under the action of static pressure, determine the corresponding relationship between the sensor output and input, and determine the relevant indicators reflecting the accuracy of the sensor. Loading methods for static calibration include weights, lever-weight mechanisms, standard force rings or force sensors .
Determine the dynamic characteristics of the sensor, such as frequency or impulse response, so as to determine the operating frequency range of the sensor and the size of the dynamic error. Dynamic calibration can use sine response method and transient response method. The former uses sine exciter to input excitation signal to the sensor, and the latter obtains a transient force with known changing law to excite the sensor by special equipment.
Application scenarios and importance of sensor calibration
The sensor needs to be calibrated before and after use for a period of time to ensure its measurement accuracy and reliability. Calibration can detect whether the sensor meets the standard, correct the error and drift, and improve the accuracy and consistency of the measurement results. Especially under different environmental conditions, calibration ensures the adaptability and stability of the sensor .
In summary, sensor calibration tester plays an important role in ensuring sensor performance, improving measurement accuracy and adapting to different environmental conditions.
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