2.6.4 Magneto electric conversion
This is a conversion measurement to convert the measured physical quantity(such as displacement,speed,pressure,magnetic field,etc.)into electromotive force based on the electromagnetic induction principle or Hall effect.According to the differences based on magneto electric conversion principle,there are two kinds of common sensors:magneto electric induction sensor and Hall sensor.Due to the limitation of measurement principle,magneto electric induction sensor is only suitable for dynamic measurement which can directly measure the velocity of vibrating object and the angular velocity of rotating object.If the integral circuit or differential circuit is adopted in the measuring circuit,it can be used to measure the displacement or acceleration directly.
At present,many kinds of conversion measuring methods have been widely used in different application fields.Therefore,in the design and application of experimental scheme,one should pay attention to the following points:
(1)The correctness of the conversion principle and parameter relation should be determined.(https://www.daowen.com)
(2)The sensor should have stable and large-scale output to effectively amplify or transmit the detected signals.
(3)Determining whether there are other effects accompanying in the conversion process is required.If so,extra steps must be taken to compensate or eliminate these effects.
(4)The feasibility and economic benefits of the conversion system and measuring process should be considered with full hearts.
