High-reliability environment-adaptability magneto-electric rotating speed sensor for engine and preparation method

Abstract

The invention discloses a high-reliability environment-adaptability magneto-electric rotating speed sensor for an engine and a preparation method thereof. The sensor comprises a test gear and a sensormain body, the sensor main body comprises a shell, a framework and an iron core, magnetic steel is arranged at the rear end of the iron core, and two groups of induction coils are wound on the outerside of the framework in a parallel and synchronous manner; two groups of annular transformers are arranged at the rear end in the shell of the sensor and between the induction coils and a signal output wire; primary leading-out wires of the annular transformers are connected with leading-out wires of the two groups of induction coils, and secondary leading-out wires of the annular transformers are connected with a rotating speed signal output wire; and the rotating speed signal output wire extends out of the rear end of the shell and is connected with a tail accessory. According to the invention, the two induction coils can be ensured to be completely symmetrical, the rotating speed signals output by the two induction coils can be completely synchronized, and the accuracy is improved; andmeanwhile, the output amplitude of the rotating speed signals under the low rotating speed condition can be greatly improved, and the requirement for the lowest output amplitude of the rotating speedsignals is effectively met.

Description

technical field [0001] The invention belongs to the technical field of engine measurement and control, and in particular relates to a highly reliable and environment-adaptable magnetoelectric rotational speed sensor for an engine and a preparation method thereof. Background technique [0002] For the magnetoelectric wheel speed sensor, the accuracy and reliability of measurement are the most critical technical characteristics of the sensor, and the double-redundancy coil design method is an effective means to realize the above-mentioned key technical characteristics. At present, the existing dual-redundancy magnetoelectric speed sensors mainly have two structural forms. One is that the two sets of induction coils are wound on the same skeleton in two inner and outer layers. Due to the difference in the circumference of each coil in the inner and outer layers, this structure cannot guarantee that the resistance and the number of turns of the two sets of coils are exactly the ...

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Problems solved by technology

[0003] When the magnetoelectric wheel speed sensor is at low speed, because the effective output signal amplitude is too small and the noise content is high, the anti-interference ability of the sensor is poor, so that the relevant measurement and control system cannot accurately identify and measure, and cannot accurately judge low speed. The actual operating status of the equipment

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