Discrete quantity and analog quantity normalized acquisition circuit and method

Abstract

The invention belongs to the technical field of discrete quantity and analog quantity acquisition, and particularly relates to a discrete quantity and analog quantity normalized acquisition circuit and method. The discrete quantity and analog quantity normalized acquisition circuit comprises a signal configuration unit, a switching matrix 1, a switching matrix 2, a one-out-of-four switch, a rangeconfiguration unit, an A / D converter and a logic control unit, wherein the signal configuration unit is connected with the switching matrix 1 and the switching matrix 2; the one-out-of-four switch isconnected with the switching matrix 1, the switching matrix 2 and the range configuration unit, and the A / D converter is connected with the range configuration unit and the logic control unit. In theinvention, the system uses one conversion channel in discrete quantity input and analog quantity input, realizes acquisition of the discrete quantity input according to a voltage acquisition method and has the characteristics of small size, low power consumption and light weight; and meanwhile, the system has a complete interface protection function and BIT mechanism and is accurate in fault location, high in isolation rate and high in reliability.

Description

technical field [0001] The invention belongs to the technical field of airborne discrete and analog acquisition technology, and in particular relates to a discrete and analog normalized acquisition circuit and method. Background technique [0002] Aircraft electromechanical systems usually require tens to hundreds of discrete and analog inputs for sensor state acquisition or precise control. Aircraft discrete input generally refers to 28V / open discrete input and ground / open discrete input. The acquisition principle is that each discrete input needs to be equipped with a conversion channel, and each channel needs to use circuit processing to convert 28V aviation power supply, open circuit state And the ground state is converted to TTL level for computer acquisition; the aircraft analog input also needs to be equipped with a conversion channel, and each channel needs to be equipped with a signal conditioning circuit to configure the input as a standard voltage input for use by...

AI Technical Summary

Problems solved by technology

With the development of electromechanical systems, the system has a sharp increase in the number of discrete and analog input channels, and traditional solutions are difficult to meet the requirements

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