Three-channel pitch detection/conversion device for all-around propeller of submersible

Abstract

The invention provides a three-channel pitch detection / conversion device for an all-around propeller of a submersible. Three encoders of a signal acquisition unit detect and encode the pitch angles of three blades of the all-around propeller, and then output the pitch angles in synchronous serial signal form; a main control chip acquires the synchronous serial signals output by the encoders, performs data processing to obtain data and transmits the data via a serial port; an RS-485 signal driving end of a data communication unit converts the transmitted serial TTL level signal into a standard RS-485 differential signal and transmits the differential signal to an RS-485 bus for long-distance transmission; an RS-485 signal reception end converts the received differential signal back into a TTL level signal and transmits to be sent the main control chip; and a liquid crystal display unit converts the obtained data into ASCLL codes corresponding to the pitch angle values and drives an LCD to display corresponding pitch angle values. The invention has the characteristics of multipath conversion, real-time output, low power consumption, good reliability, long service life, simple structure, and the like.

Description

technical field [0001] The invention relates to a signal conversion device of an underwater submersible. Background technique [0002] The omnidirectional propeller is a new type of special propulsion device. During the process of the blades rotating one circle, through the periodic change of the pitch angle of the blades, it not only generates axial thrust parallel to the propeller shaft, but also Generate thrust. Therefore, in addition to the functions that ordinary propeller propellers can achieve, the use of omnidirectional propellers can also achieve lateral and vertical movement, which can save the horizontal and vertical slot propellers, greatly reduce the weight of the submersible, and improve Submersible structure and layout. Because the omnidirectional thruster generates thrust in any direction by changing the propeller pitch angle, accurate detection and feedback of the pitch angle becomes the key to the control of the omnidirectional thruster and becomes one of...

AI Technical Summary

Problems solved by technology

However, the synchronous serial signal has the disadvantages of short transmission distance, low rate, and easy interference, which cannot guarantee the accuracy and reliability of pitch detection.

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