Design and Implementation of Underwater Propeller Speedometer

The speed instrument for the underwater propeller is designed.This instrument which makes full use of Hall current sensor to detect the reversing ripple of the running motor so as to measure the speed,uses the single chip to control calculation,and achieves convenient measurement of non-contact,high-precision and digitization.This instrument also makes the clamp ammeter which can be measured briefly,and commodiously measures the speed of motor in the event of not changing the original in mechanical and electrical structural.In addition,the instrument can measure motor current and voltage,power efficiency,temperature,humidity and so on.The alarm and remote acquisition control and so on are realized by using humanized and modular design.