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GB T7665-2005 "General Terminology for Sensors" is the basic terms and definitions of sensors in the national standard of the People's Republic of China. This standard specifies the general terms of sensors and their definitions, and applies to the design, production, application, and research of sensors. The following is an explanation and explanation of some important terms in GB T7665-2005.
1.Sensor: A device or device that can sense a specified measurement and convert it into a usable signal according to a certain law, usually composed of a sensitive element and a conversion element.
2.Sensitive element: A component that can directly sense the physical quantity (such as displacement, deformation, pressure, electricity, etc.) that is measured and output a certain relationship with the measured.
3.Transducer: A component that converts the physical quantity output by a sensitive component into an electrical signal (such as voltage, current, frequency, etc.) that is convenient for transmission or processing.
4.Static characteristics: The characteristics of the sensor when it inputs a static signal, such as linearity, hysteresis, repeatability, accuracy, and temperature drift.
5.Dynamic characteristics: The characteristics of the sensor when it is fed with a dynamic signal, such as frequency response, rise time, overshoot, and oscillation.
6.Nonlinearity: The nonlinear relationship between the output signal and the input signal of the sensor, usually described by curve fitting.
7.Sensitivity: The ratio of the amount of change in the output signal of the sensor to the amount of change in the input signal, usually expressed as the proportionality constant between the output and the input.
8.Hysteresis: The phenomenon that the output signal of the forward and reverse stroke of the sensor is inconsistent under the same input signal, usually due to the physical or chemical properties inside the sensor.
9.Repeatability: The inconsistency between the output values obtained by the sensor for multiple consecutive measurements under the same input condition, which is usually used to measure the measurement accuracy of the sensor.
10.Drift: The change of the output signal caused by the change of environmental conditions or internal parameters during the use of the sensor, which is usually manifested as zero drift and sensitivity drift.
11.Resolution: The minimum amount of change in the input signal that the sensor can measure, usually expressed as the ratio of the amount of change in the output signal to the minimum value of the change in the input signal.
12.Measurement range: The range between the maximum and minimum values of the input signal that the sensor is able to measure, usually expressed as the input range and output range.
13.Accuracy: The degree of accuracy of the sensor's measurements, usually expressed as the error between the actual measured value and the theoretical value.
14.Environmental adaptability: The stability and reliability of the sensor under different environmental conditions (such as temperature, humidity, pressure, vibration, etc.) is one of the important indicators to measure the performance of the sensor.
15.Reliability: The ability of a sensor to perform a specified function under specified conditions and within a specified time, usually expressed in terms of lifetime and failure rate.
The above is the explanation and description of some important terms in GB T7665-2005 "General Terminology of Sensors", which also includes more terms and definitions, which is of great significance for a comprehensive understanding and mastery of the relevant knowledge and technology of sensors.