What is the Measuring Range and Sensitivity of the Accelerometer?

An accelerometer is an instrument used to measure acceleration, commonly used in physics, engineering, and other related fields. In the design and selection of acceleration timing, we need to consider the main specifications are: measurement range, sensitivity. The sensitivity of acceleration sensor is one of the most basic indicators of sensor. The sensitivity of the sensor directly affects the measurement of vibration signal. The measurement range of the acceleration value sensor refers to the maximum measurement value that the sensor can measure within a certain nonlinear error range. The nonlinear error of the universal piezoelectric acceleration sensor is mostly 1%. As a general principle, the higher the sensitivity, the smaller the measurement range, and the smaller the sensitivity, the larger the measurement range.

Accelerometer measuring range:

The level of acceleration supported by the acceleration sensor output signal specification is usually expressed as ±g, which is the maximum acceleration that the device can measure and accurately represent through its output. For example, the output of a ±3g accelerometer is linearly related to the acceleration within ±3g. If accelerated to 4g, the output may not be valid. Note that the limit value is specified by the absolute maximum acceleration, not by the measurement range. 4g acceleration does not disable the ±3g accelerometer. The ER-QA-03D is an accelerometer specifically designed for applications in the oil and gas field, with zero bias stability of 50μg, maximum operating temperature of 180 ° C and impact resistance of 500-1000g 0.5ms compared to the high temperature operating environment in the field.

Accelerometer sensitivity:

The ratio of the acceleration (input) change to the output signal change. It defines an ideal linear relationship between acceleration and output. Sensitivity is specified by a specific supply voltage. For analog output accelerometers, the unit is usually mV/g; For digital accelerometers, the units are usually LSB/g or LSB/ mg. It is usually expressed as a range (minimum, typical, maximum), or as typical plus a percentage deviation (%). For analog output sensors, the sensitivity is proportional to the supply voltage. For example, double the power, double the sensitivity.

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