This paper proposes a special mud pressure pulse signal simulator based on Atmega128 single-chip microcomputer, which is used in the research, development and maintenance of wireless measurement while drilling instruments for oil drilling. The core of this signal simulator is the ATmega128 single-chip microcomputer, which simulates various types of signals and noises through the software of the single-chip microcomputer, and can mix these signals and noises and output them in the form of a standard industrial sensor with a 4-20 mA current loop through a special hardware circuit. This simulator is simple and convenient to use, can realistically simulate the pressure signal of the actual engineering site, has good stability and advanced performance.
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