Intelligent data acquisition and monitoring module of pre-installed electric house

Abstract

The invention provides an intelligent data acquisition and monitoring module of a pre-installed electric house which adopts a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) multi-path electronic switch to switch a multi-channel signal input and shares a set of signal conversion, isolation, amplification, A / D (Analog to Digital) conversion and processing circuit, therefore, a data acquisition module structure can be greatly simplified; the device is capable of receiving a plurality of test signal resources, and simultaneously realizing complete isolation between a signal end and an amplifier, therefore, the device is good in isolation effect and high in signal transmission precision; furthermore, by adopting a moment gain K as the magnification times of processing transmission signals, the drift of an amplification circuit can be effectively eliminated due to the temperature influence; in addition, the precision of the amplified signal is higher by automatically selecting a measuring range. The intelligent data acquisition and monitoring module provided by the invention is complete in function, convenient and flexible to operate and precise in test signal, and is capable of implementing the functions of long-range 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 converted, its amplifier will drift due to the influence of temperature, and the signal transmission error will be large;

[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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