Consumption signal conversion module

Abstract

The invention provides a consumption signal conversion module which comprises a drive signal generation circuit, a detection circuit, a modem circuit and a pulse signal generation circuit which are integrated in a module by a thick module. An RC bridge type sine wave oscillation circuit of a power amplifying circuit is connected in series in the drive signal generation circuit, a switch K4 and a capacitor C15 are arranged at the control end, the RC bridge type sine wave oscillation circuit generates two alternating current drive signals through the power amplifying circuit, the drive signals drive two ends of a consumption sensor through a positive phase voltage following circuit and a negative phase voltage following circuit to enable the consumption sensor to form a modulation carrier signal in the rotating process, the modulation carrier signal is filtered, detected, amplified and compared through the modem circuit and then transferred to the pulse signal generation circuit to generate a pulse signal for a micro processor to recognize. The consumption signal conversion module is small in size, low in power consumption and high in reliability, overcomes the shortcoming in the prior art that a printed circuit board (PCB) board occupies a large amount of assembly space, and can detect fault information of the consumption sensor on an airplane.

Description

technical field [0001] The invention relates to a fuel consumption signal conversion module mainly used for measuring fuel consumption, fuel consumption and instantaneous flow of airplanes, automobiles and ships. Background technique [0002] The electrical control of the fuel system includes a fuel quantity measuring system and a consumption system. Aircraft fuel consumption system mainly includes consumption sensor and consumption meter. The consumption sensor is used to convert the fuel flow into a pulse signal of a certain frequency to drive the meter head, and the consumption gauge is used to indicate the total remaining fuel of the aircraft, so as to determine the fuel consumption of the aircraft. The performance of the fuel consumption system directly affects the pilot's control judgment and flight safety. Its performance needs to be tested regularly. The fuel consumption measurement system is one of the important airborne systems. It is the fuel addition control, tr...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a circuit with small size, low power consumption, strong compatibility, high reliability and good versatility for the defects of poor anti-interference, bulky, high cost and no calibration function of the existing consumption measurement circuit. and low-cost consumption signal conversion modules

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