Considerations for the selection of inductive sensors

Create Date: 2024-8-30 12:03:23|Source: TURCK/TURCK

1. Program selection

Before selecting a plan, the given technical indicators should be clarified, such as the scale of the value, the error of the value, the resolution, the repeatability error, the time drift, the temperature drift, the application environment, etc.

                                 Considerations for the selection of inductive sensors

2. Selection of core materials

The main basis for the selection of core data is to have a high permeability coefficient, a high saturation magnetic induction intensity and a small hysteresis loss, and the remanence and coercive magnetic force are small. In addition, it is also required to have high resistivity, high Curie point temperature, stable magnetic properties, and easy processing. Commonly used magnetic permeability materials include ferrite, iron-nickel alloy, silicon steel sheet and pure iron.

3. Selection of power supply frequency

Progressive power supply frequency has the following advantages: it can improve the figure of merit of the coil; There is a definite improvement in sensitivity; Proper frequency advancement also facilitates the design of the amplifier. However, too high a power supply frequency can also bring disadvantages, such as increased eddy current losses in the core; The skin effect of the wire will reduce the sensitivity; Increase parasitic capacitance (including coil-to-turn capacitance) as well as the effects of external interference.

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