An intelligent data acquisition and monitoring module for a prefabricated electrical house

Abstract

The invention provides an intelligent data acquisition and monitoring module of a pre-installed electrical house, which uses a CMOS multi-channel electronic switch to switch multi-channel signal input, and shares a set of signal conversion, isolation, amplification, A / D conversion and processing circuits, which can The structure of the data acquisition module is greatly simplified. One device can receive and test multiple signal sources, and at the same time realize the "complete isolation" between the signal terminal and the amplifier. The isolation effect is good, and the signal transmission accuracy is high. The instant gain K is used as the processing transmission The magnification of the signal can effectively eliminate the drift of the amplifying circuit due to the influence of temperature. In addition, by realizing automatic selection of the range, the accuracy of the amplified signal is higher. It is very good to realize the function of wireless monitoring and management.

Description

technical field [0001] The invention relates to the field of data collection and monitoring, in particular to an intelligent data collection and monitoring module of a prefabricated electrical house. Background technique [0002] Prefabricated electrical house (see figure 1 , figure 2 ) is a product installed outdoors with an integrated solution for power transformation (distribution) and power consumption. It collects and monitors the data of high-voltage switchgear, low-voltage switchgear, transformers, and medium and low-voltage frequency converters according to the owner's or designer's electrical house plan. The main electrical equipment such as the control system is reasonably arranged in the customized movable steel structure room. At the same time, based on the internal and external conditions and requirements of the electrical house, the air conditioning system, lighting system, fire alarm and sound and light alarm system are configured, so that the electrical ca...

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Problems solved by technology

[0003] 1) Analog signal transmission is mostly used, which is susceptible to interference, low precision, and complicated connection; using analog signal transmission, it needs to be converted into a standard signal through sensors and transmitters, and then transmitted, so the system is very complicated and the cost is high;

[0004] 2) When using analog signal transmission, processing and conversion, one signal needs to correspond to a set of processing and converters, and the system is more complicated;

[0005] 3) In traditional analog signal transmission, photocouplers are often used for isolation, which has poor linearity and interference;

[0006] 4) When the traditional analog signal is transmitted, processed and transformed, its amplifier has drift due to the influence of temperature, and the signal transmission error is large; the patent document with the application number CN101872193A fails to propose a solution to this problem

[0007] 5) The A / D of the traditional analog signal converter has low resolution due to the low number of digits;

[0008] 6) The traditional monitoring and control module does not use the field bus system, which makes the monitoring and control inflexible, that is, it has no management function and no remote monitoring function;

[0009] 7) The traditional substation system, power consumption system and transmission device are set separately, and its parameter monitoring and control are also scattered, which makes the monitoring and control system extremely complicated, and cannot be pre-installed, making the on-site installation complicated, and on-site debugging is required to complete the project long time

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