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Inductive sensors use changes in a magnetic field to determine the distance to the target; capacitive sensors use changes in capacitance. There are factors other than the distance to the target that can also change a magnetic field or capacitance. These factors represent potential error sources in your application.
In this article we will discuss the differences between the inductive and capacitive proximity switches, and explain how they work with a number of applications as an example.
While capacitance relates to the storage of electrical charge, inductance deals with the storage of magnetic energy. In this article, we will explore the characteristics of capacitance and inductance, their differences, and their significance in different circuit configurations.
An inductive sensor generates an AC magnetic field which induces eddy currents on the conductor’s surface. Generated Eddy currents: Reduce the inductor’s magnetic field reducing the inductance of the sensor. Lower inductance results in: Higher sensor frequency which reduces the skin depth.
Depending on the specific application and system requirements, you may need different ways to measure this change. In this post, I will cover two specific types of architectures – the switched-capacitor circuit and inductor-capacitor LC tank circuit – currently being used in capacitive sensing.
Inductive sensors are based on the principle of magnetic induction and are used for detecting non-contact position of target metal. Cypress inductive sensing solutions bring elegant, reliable, and easy-to-use inductive sensing functionality to your product.
5 Σεπ 2014 · The author experimentally found that there exists a self-inductance effect between the metallic electrodes of a conventional two-electrode capacitance-type level sensor. This self-inductance varies non-linearly with level or may affect the linear dynamic performance of the level transducer.
