A discrete and analog normalized acquisition circuit and method

An acquisition method and acquisition circuit technology, applied in the direction of electrical components, analog/digital conversion, analog-to-digital converter, etc., can solve the problems of increasing demand for the number of analog input channels, and the solution method is difficult to meet the requirements, etc.

Active Publication Date: 2021-09-14
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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  • Abstract
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  • Application Information

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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

Method used

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  • A discrete and analog normalized acquisition circuit and method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] figure 1 It is a functional block diagram of a discrete quantity and analog quantity normalization acquisition circuit and method system provided by the present invention. refer to figure 1 As shown, the system includes a signal configuration unit, a switch matrix 1, a switch matrix 2, a four-selection 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.

[0034] The working mechanism of the system is as follows:

[0035] (1) After pow...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
CPCH03M1/1245
Inventor 陈奎刘卫华赵君呼明亮宋晓南何文静
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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