SU366427A1 - ANGULAR DISPLACEMENT CONVERTER ON THE HALL SENSOR - Google Patents

Description

one

The invention relates to magnetic measurements.

Angular displacement transducers are known, the principle of action of which is based on the use of Hall sensors. Odiako that "flowing through the Hall sensor, and consequently, the sensitivity is limited by a small permissible power dissipated by the Hall element in the air. The attachment of Hall elements to transducer links with good thermal conductivity and the ability to dissipate heat, such as magnet poles, in such converters is unacceptable, as this would deprive the Hall sensor of its mobility relative to the display, which is provided by the principle of the transducers.

In order to increase the sensitivity, the proposed angular displacement transducer is equipped with a loop with a drop of silicone fluid with a Hall sensor inside it placed between the poles of the magnet.

The silicone fluid is chemically inert and has good electrical insulating properties.

The Hall sensor, ooihraash former degrees of freedom with respect to the pipeline, allows more power to be dissipated than in known converters.

The drawing is a diagram of the proposed Converter.

Between the poles of magnet 1, there is a Hall sensor 2 located inside the drop of silicone fluid 3 and open loop 4, fastened to the magnet and designed to prevent the drop from flowing out during vibrations and shocks.

The principle of the transducer is that with the angular displacement of the Ho.1l sensor in the field of the magnet at a given current through it, the output magnitude of the transducer is a function of the angle of rotation.

e klBsin,

where e is the emf Hall;

/ - current through the Hall sensor; B - induction in the gap; k is the constant of the Hall sensor.

As the current increases, the 4yBCTBi TevibHocTb converter increases and the power dissipated by the Hall sensor increases.

R /;

where P is power;

Hall sensor for

g - current resistance.

Subject invention

The angular displacement transducer of the Hall sensor, containing a magnet and a Hall sensor, is characterized in that, for the purpose of increasing the sensitivity of the transducer, it is equipped with a loop with a drop of silicone fluid with a Hall sensor inside it, interposed between the poles of the magnet.