1、Acceleration sensor selection: The selection of sensors mainly considers the vibration, impact range, frequency, subsequent supporting instruments, and the impact of the environment on the sensor.
2、Reference sensitivity: refers to the positive charge output or voltage output generated by a sensor under the action of a unit of mechanical quantity( Acceleration, Velocity, Displacement, Pressure, Force).
3、Resonant frequency (natural frequency): The resonant frequency generated by a sensor under external force is called the resonant frequency, which is generally the non-operating frequency.
The flat section with a frequency of one-third or one-fifth of the resonant frequency is used, and about one-third of our factory’s specifications.
4、Dynamic range: The sensitivity change range of the accelerometer within the working frequency, and the deviation value of our products is less than ± 10%.
5、Lateral sensitivity ratio: The ratio of the output of an accelerometer to the spindle acceleration value when subjected to vibration or impact perpendicular to the axis. The smaller the value, the less lateral interference it is affected by.
6、Amplitude linearity: A measure of the linearity output of an accelerometer within its specified amplitude range. Ideally, the accelerometer should have the same sensitivity at any amplitude point within its specified amplitude range.
7、Internal structural form: refers only to the piezoelectric crystal installation structure and force situation of the accelerometer, divided into shear, and compression. The shear type is not affected by base strain and environment, while the center compression type is suitable for impact and broadband.
8、IEPE sensor: It is a type of sensor that places a charge/voltage conversion circuit inside a piezoelectric sensor and uses a two wire system (with the core wire as the power supply and signal output, and the outer shielding layer as the ground wire). It can be made into an acceleration, pressure, and force sensor. It has low price and excellent anti-interference performance. The sensor outputs a voltage of ± 5Vp, with a power supply voltage of+18~+24VDC and a constant current of 2mA~10mA.
9、Dual electric power: The power supply provided for the built-in circuit is dual electric power, which can be ± 15V or other. The sensor output is ± 10Vp or ± 5Vp, in a four wire system, and can also be made into a 4-20mA current output.
10、Range: Refers to the range of use of the sensor, and the maximum measurement value mainly considers the sensor's ability to withstand vibration and impact without damage. The minimum measurement range mainly considers the signal-to-noise ratio (also known as resolution) of the measurement system.
11、The range of the sensor should be around 70% of the nominal range of the sensor.
