High-reliability multi-type electric power front-end temperature acquisition device and system

Abstract

The invention relates to a high-reliability multi-type electric power front-end temperature acquisition device and system.The device comprises a power supply, a system side circuit and a field side circuit, the system side circuit and the field side circuit are connected with the power supply, and the power supply supplies power to the system side circuit and the field side circuit after being subjected to voltage transformation and isolation; the system side circuit and the field side circuit are in communication connection; the field side circuit is used for controlling signal acquisition channels corresponding to detection signals to be conducted according to signal detection information, preprocessing the detection signals, and sending the preprocessed detection signals and precision resistance signals provided by the interior of the field side circuit to the system side circuit; and the system side circuit is used for comparing and processing the processed detection signal with the precision resistance signal to obtain a field temperature value to be detected. According to the invention, multiple types of signals such as millivolt signals, resistance signals, thermocouples and thermal resistors can be configured, and the anti-interference characteristic is very good.

Description

technical field [0001] The invention relates to the technical field of automation and instrumentation, in particular to a highly reliable multi-type power front-end temperature acquisition device and system. Background technique [0002] In the field of industrial control, the power front-end signal acquisition device is an important module of the input signal of the field control station, and the type of signal it can collect and the reliability of the device are very important. Domestic medium and large thermal power plants usually adopt a centralized control system, but the on-site signals are relatively scattered. In practical applications, there are often too many temperature analog signal collection points and the cost is huge. [0003] Signal acquisition devices are often used to collect signals from temperature sensors in production sites and public works. Currently, analog signal input devices can collect signals of a single type, which cannot meet complex temperatu...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a highly reliable and multi-type power front-end temperature acquisition device and system, which solves the problem that the signal types collected by the existing signal acquisition device are relatively single and cannot meet the requirements of more complex measurements. temperature requirements and does not have a good anti-interference function of the technical problem

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