Onboard Fuel System Remote Interface Unit

Abstract

The invention provides an airborne fuel system remote interface unit, and aims to provide a remote interface unit that the hardware utilization is high, the management is unitive, the maintenance is convenient, the interference with transmission is small, the fault-tolerant capability and fault detect capability are high, the complexity of cables can be lowered, and information is transmitted through a bus network. The remote interface unit provided by the invention is implemented by the following technical scheme: a temperature sensor converting interface, a pressure sensor converting interface, a density sensor converting interface are connected with a CPU (Central Processing Unit) daughter card respectively by a moving filter circuit, an inverter and a reference voltage circuit through a multiplexer switch circuit, a capacitive sensor converting interface, a consumption sensor converting interface, a mass flowmeter converting interface, a discrete input signal converting interface are connected with the CPU daughter card respectively by a digital electric bridge circuit, a converting module, a signal processing circuit, and an isolation conversion circuit; the CPU daughter card nearby collects various control signals and sensor signals of a fuel system through the various interfaces, and uploads the control signals and sensor signals to a supervisory computer.

Description

technical field [0001] The invention relates to a fuel system mainly used for measurement, real-time control, state monitoring and self-testing of physical quantities (oil quantity, capacitance, temperature, pressure, density, consumption, mass flow) of airplanes, automobiles, ships, tanks and special vehicles. Remote interface unit RIU. Background technique [0002] In modern aircraft, the comprehensive management of airborne electromechanical systems has become an inevitable trend. On the basis of the rapid development of avionics technology and data bus technology, all public equipment is studied as a whole, and the system after comprehensive management can solve Extensive problems with pre-synthesis systems. The integration of electromechanical systems can greatly reduce the weight and volume of electronic equipment, significantly improve the reliability, maintainability and fuel economy of aircraft, and significantly improve the sophistication and testability of electr...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the problem that the signal types of the airborne system in the prior art are very complex, various signals are distributed in different parts of the body, and the signal distribution is very messy and chaotic, to provide a hardware with high utilization rate, unified management, and convenient maintenance. Small transmission interference, strong fault tolerance and fault detection capabilities, can reduce the complexity of the connection, can effectively extract the status information of the onboard equipment of the fuel system, and transmit the information to the cockpit through the bus network for centralized control of the remote interface of the onboard fuel system Unit RIU

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