Sensor basic knowledge and common terms
Sensor basic knowledge and common terms
1. Sensor: a device or device that can sense the prescribed measurement and convert it into a usable output signal according to a certain rule. Usually composed of sensitive components and conversion components.
① Sensitive element refers to the part of the sensor that can be directly (or responded) to be measured.
② The conversion element refers to the part of the sensor that can be sensed (or responded) to the north side of the sensor, which is converted into an electrical signal that is transmitted and/or measured.
③When the output is a specified standard signal, it is called a transmitter.
2. Measuring range: the range of the measured value within the allowable error limit.
3. Range: the algebraic difference between the upper limit and the lower limit of the measurement range.
4. Accuracy: the degree of agreement between the measured measurement result and the true value.
5. From refolding: Under all the following conditions, the degree of agreement between the results of multiple consecutive measurements of the same measured quantity:
……Same measurement method:
...The same observer:
...The same measuring instrument:
……Same conditions of use:
...Repetition in a short period of time.
6. Resolution: the small change of that the sensor may detect in the specified measurement range circle.
7. Threshold: The measured small change that can make the sensor output produce a measurable change.
8. Zero position: the state that minimizes the absolute value of the output, such as the equilibrium state.
9. Excitation: external energy (voltage or current) applied to make the sensor work normally.
10. Maximum excitation: the maximum value of excitation voltage or current that can be applied to the sensor under urban conditions.
11. Input impedance: The impedance measured at the input terminal of the sensor when the output terminal is short-circuited.
12. Output: The amount of electricity generated by the sensor is a function of the external measurement.
13. Output impedance: the impedance measured at the output terminal of the sensor when the input terminal is short-circuited.
14. Zero point output: Under the conditions in the city, the output of the sensor when the measurement is zero.
15. Hysteresis: within the specified range, when the measured value increases and decreases, the maximum difference that appears in the output.
17. Drift: In a certain time interval, the sensor output is finally measured irrelevant and unwanted changes. 18. Zero drift: the change of zero output at a specified time interval and indoor conditions. 19. Sensitivity: the ratio of the increment of sensor output to the corresponding increment of input.16. Late: The time delay of the output signal change relative to the input signal change.
20. Sensitivity drift: The change in the slope of the calibration curve caused by the change in sensitivity.
21. Thermal sensitivity drift: sensitivity drift caused by changes in sensitivity.
22. Thermal zero drift: the zero drift caused by the surrounding temperature changes.
23. Linearity: the degree to which the calibration curve is consistent with a certain regulation
. 24. Philippine linearity: the degree of deviation of the calibration curve from a specified straight line.
25. Long-term stability: The sensor can still maintain the ability not to exceed the allowable error within the specified time.
26. Intrinsic reliability: when there is no resistance, the sensor's free (no external force) oscillation reliability.
27. Response: The characteristic of the measured change during output.
28. Compensation temperature range: the temperature range compensated by keeping the sensor range and zero balance within the specified limits.
29. Creep: When the environmental conditions of the measured machine remain constant, the change in output within a specified time.
30. Insulation resistance: If there is no other regulation, it refers to the resistance value measured between the insulated parts of the sensor when the specified DC voltage is applied at room temperature.