Basic knowledge of sensor and the common terms

1 sensor: can you feel the rules is measured and converted into usable output signal according to certain rules of device or devices. There are usually sensitive components and conversion components.

(1) sensitive element refers to a sensor that can be directly ( Or response) Be part of the measurement.

2) conversion element refers to the sensor can feel sensitive element ( Or response) Quantity is converted to and transfer and (on the north side of the Or) Measuring the electrical signals.

(3) when the output is the standards set by the signal, it is called a transducer.

2 measuring range: within the allowed error limits the range of measured values.

3 range, measurement range difference upper limit and lower limit of algebra.

4: precision by measuring the degree of agreement between the measured results and the true value.

5 repeatability: in all the following conditions, many times to the same measured the amount of continuous measurement results conform to the degree between:

the same measurement: the same observer: the same measuring instrument: same location: the same conditions of use: repeat in a short period of time.

6 resolution: sensor in the specified measuring range circle could detect the smallest change of the measured quantity.

7 threshold: can make the sensor output produces measurable changes in the smallest change of the measured quantity.

8 zero: make the output is the absolute value of the smallest states, such as balance.

9 incentive: to make the normal work of the sensor and applying external energy ( Voltage or current) 。

10 biggest motivation: under the condition of the city, can be applied to a maximum of the excitation voltage or current on the sensor. Input impedance:

11 on the output side short circuit, sensor input end of the measured impedance.

12 output: produce and plus be measured into a power function relationship.

13 output impedance: when the input circuit, sensor output measured impedance.

14 zero output: under the condition of the city, and is measured by the output of the sensor is zero.

15 lag: within the prescribed scope, when measured value increases and decreases in the output of the biggest difference.

16 later: output signal changes relative to the input signal time delay.

17 drift: in certain time interval, the sensor output was measured irrelevant don't need to change.

18 zero drift: under the condition of specified time interval and indoor zero output changes.

19: the sensitivity of sensor output increment and the ratio of the corresponding input increment.

20 sensitivity drift: due to the change of sensitivity caused by changes in the slope of the calibration curve.

21 thermal sensitivity drift: sensitivity drift caused due to the change of sensitivity.

22 thermal zero drift, zero drift caused by temperature change around.

23: linearity calibration curve only with a certain rules.

24 Philippine linearity: the degree of calibration curve with a certain stipulations linear deviation.

25 long-term stability: sensors within the prescribed period of time still retain the ability to not exceed the permitted error.

26 with intrinsic rate: freedom, in the absence of resistance sensor ( Without external force) Oscillation by rate.

27 response: by measuring the output of the characteristics of the change.

and compensation temperature scope: keep the sensor range and zero balance compensation within the limit specified temperature range.

29 creep: when measuring machine much when environmental conditions remain constant, the change of output within the given time.

30 insulation resistance: if no other regulations, refers to the dc voltage of applying rules at room temperature, the rules from the sensor measured resistance value between insulation parts.

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