A discrete and analog normalized acquisition circuit and method

Abstract

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. A discrete and analog normalized acquisition circuit, said circuit comprising: a signal configuration unit, a switch matrix 1, a switch matrix 2, a four-selection one switch, a range configuration unit, an A / D converter and a logic control unit. The signal configuration unit is connected to the switch matrix 1 and the switch matrix 2 respectively; the four select one switch is connected to the switch matrix 1, the switch matrix 2 and the range configuration unit respectively, and the A / D converter is connected to the range configuration unit and the range configuration unit respectively. Logic control unit connection. In the present invention, the discrete quantity input and the analog quantity input of the system multiplex a set of conversion channels, and the discrete quantity input acquisition is realized through the voltage acquisition method, which has the characteristics of small size, low power consumption and light weight; at the same time, the system has complete interface protection Function and BIT mechanism, accurate fault location, high isolation rate, and high 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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