Data acquisition system convenient for realizing RS (Remote Sensing) 485 bus networking

Abstract

The invention discloses a data acquisition system convenient for realizing RS (Remote Sensing) 485 bus networking, which comprises a power supply and a processor, wherein the input end of the processor is connected with a signal time-sharing multiplexing circuit, and the input end of the signal time-sharing multiplexing circuit is connected with a signal acquisition and conditioning circuit. The signal acquisition and conditioning circuit is composed of an analog quantity acquisition and conditioning circuit, a digital quantity acquisition and conditioning circuit and a switching value acquisition and conditioning circuit. The input end of the analog quantity acquisition and conditioning circuit is connected with a sensor group 1, the input end of the digital quantity acquisition and conditioning circuit is connected with a sensor group 2, and the input end of the switching value acquisition and conditioning circuit is connected with a sensor group 3. The output end of the processor is connected with an RS485 bus transceiver, and the output end of the RS485 bus transceiver is connected with an RS485 bus isolation transformer used for connecting an RS485 bus. The data acquisition system has reasonable design and is simple and convenient for use and operation, and the data acquisition system is convenient for realizing RS485 bus networking. According to the data acquisition system, deployments of field acquisition equipment can be reduced, difficulty of field operation can be reduced, and manpower and material costs can be saved.

Description

technical field [0001] The invention relates to a data acquisition system, in particular to a data acquisition system which facilitates the realization of RS485 bus networking. Background technique [0002] As people pay more attention to the environment, the intensity of environmental index monitoring is increased; the number of various types of quantities that need to be collected on the spot increases, and the number of sensors will be a huge number. How to accurately collect the data of the sensors A very important link. The sensors deployed in the field are often very scattered, and the distance between the sensor locations ranges from tens of meters to hundreds of meters. Requirements, the distance between the acquisition of many signals and the position of the sensor has a clear distance requirement, and for accurate measurement, one acquisition device often cannot meet the requirements of the site, so two or more acquisition devices may be deployed on the site, so th...

AI Technical Summary

Problems solved by technology

[0002] As people pay more attention to the environment, the intensity of environmental index monitoring is increased; the number of various types of quantities that need to be collected on the spot increases, and the number of sensors will be a huge number. How to accurately collect the data of the sensors A very important link. The sensors deployed in the field are often very scattered, and the distance between the sensor locations ranges from tens of meters to hundreds of meters. Requirements, the distance between the acquisition of many signals and the position of the sensor has a clear distance requirement, and for accurate measurement, one acquisition device often cannot meet the requirements of the site, so two or more acquisition devices may be deployed on the site, so that Not only does it increase the cost, but the most important thing is that after deploying a large number of collection devices, the difference in the collection accuracy of each device leads to errors in the collection data, which makes it difficult to accurately monitor the corresponding environmental indicators

In addition, the location of some sensors is relatively harsh. For example, the sensors deployed on the chimney face many difficulties in their maintenance and corresponding settings on site. It is also practical to reduce the work difficulty of on-site construction personnel.

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