Digital angular displacement sensor signal conditioning circuit design method

Abstract

The invention relates to a digital angular displacement sensor signal conditioning circuit design method, and belongs to the technical field of power device control. With the method of the invention adopted, the quality of signals such as the excitation and output signals of a sensor is improved; adverse effects such as temperature drift are eliminated; system control performance is improved; theanalog-to-digital conversion acquisition mode of the output signals of the sensor is more stable; accuracy is improved; design is simplified; a system joint debugging process is optimized; test efficiency can be improved; the types and quantities of components are reduced; manufacturing costs are reduced; and reliability is improved.

Description

technical field [0001] The invention relates to the technical field of power plant control, in particular to a design method for a digital angular displacement sensor signal conditioning circuit. Background technique [0002] The angular displacement sensor is an important part of the fuel supply regulator of the bomb engine. It is used to measure the actual fuel flow of the engine. It is one of the feedback signals of the closed-loop control system. The stability of its signal conditioning circuit is very important in engine control. The angular displacement sensor assembly is connected with the main regulating valve with a gear and rack structure, so that the travel position of the main valve corresponds to the different angular positions of the angular displacement sensor. The characteristic of the angular displacement sensor is to output voltage signals according to different angular positions. The output voltage signal That is, it reflects the position and opening of th...

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Problems solved by technology

[0008] The signal conditioning process of the angular displacement sensor is relatively complicated. In the past, this part of the circuit was completely realized by analog circuits, and the design was very difficult. The existing circuits used a large number of discrete components such as resistors, capacitors, and transistors. Due to limitations, it is difficult to maintain stable circuit performance under the harsh conditions of the ammunition environment; at the same time, the sensor output signal is converted from AC to DC by an analog circuit, and the error is large, which is not conducive to improving the system accuracy; moreover, the circuit is in the production process , the debugging of various parameters can only rely on adjustable resistors or potentiometers, the debugging process is too complicated, and the production efficiency is extremely low; moreover, due to the large number and types of discrete components, the cost is high, among which potentiometers and other components The device failure rate is high, which limits the improvement of product reliability

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