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Isolated bipolarity analog quantity self-diagnosis input device

An input device and bipolar technology, which is applied in the field of isolated bipolar analog self-diagnostic input devices, can solve problems such as unsatisfactory reliability requirements, and achieve the goals of widening the scope of use, increasing power supply and signal isolation, and suppressing noise Effect

Inactive Publication Date: 2018-06-15
CHINA NUCLEAR CONTROL SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to design a high-precision analog output self-diagnosis redundant switching method to ensure the analog output in the DCS in view of the fact that the current existing analog output device products cannot meet the requirements of nuclear safety instrumentation and control systems in terms of reliability requirements. Precise control and long-term reliable and safe operation

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  • Isolated bipolarity analog quantity self-diagnosis input device

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Embodiment Construction

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0033] The present invention is realized through the following technical solutions:

[0034] Such as figure 1 As shown, an isolated bipolar analog self-diagnostic input device includes a power signal isolation circuit, a diagnostic switching circuit, a voltage boost circuit, a voltage and current acquisition circuit, a micro-control unit, and an analog-to-digital converter;

[0035] (1) The core of the power signal isolation circuit is an integrated chip that supports voltage isolation conversion and signal isolation, provides power supply for the channel circuit, and establishes isolated communication between the micro-control unit and the analog-to-digital converter;

[0036] (2) The diagnostic s...

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Abstract

The present invention relates to the technical field of industrial control, especially to an isolated bipolarity analog quantity self-diagnosis input device. The device employs an ADC (Analog-to-Digital Converter) with a GPIO function to reduce the number of communication lines of an MCU and a channel and reduce the complexity of circuit design. An integration chip is used, the development is simple, the design difficulty is low, the PCB size is reduced, the economic cost is reduced; a diagnosis circuit is added to improve the reliability of the circuit operation; and moreover, negative voltage current signals are collected, and the usage range of the device is widened.

Description

Technical field [0001] The invention relates to the technical field of industrial control, in particular to an isolated bipolar analog quantity self-diagnostic input device. Background technique [0002] With the development of industrialization, the degree of industrial automation is getting higher and higher. It is often necessary to convert analog signals into digital signals for transmission and storage, which is conducive to monitoring and controlling the controlled objects. Therefore, the use of analog input modules is increasing. The more popular. In the analog signal changes, some analog signals will cross zero, that is, positive and negative, some analog signals will not cross zero during the change process, those analog change signals that cross zero are called bipolar signals, but zero The signal is called a unipolar signal. There are two ways of analog input, unipolar and bipolar, regardless of whether it is unipolar analog input or bipolar analog input. It is usual...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0425G05B2219/21001
Inventor 陈英博王冬胡义武韩冥生付磊黎兴民詹钟
Owner CHINA NUCLEAR CONTROL SYST ENG