Distributed data collection system and data collection method based on same

Abstract

The invention provides a distributed data collection system and a data collection method based on the same. High-speed synchronous signal collection among sensors and flexible networking are realized via built-in Ethernet exchange and Ethernet transmission in the intelligent sensor node side and Ethernet based time synchronization. The data collection method overcomes disadvantages of present network and methods, advantages of easy wiring, convenient installation and maintenance and low cost of a distributed collection manner are maintained, signals among the different sensors can be collected synchronously, and further distributed collection can be applied to occasions which need multi-channel cooperative work.

Description

technical field [0001] The invention relates to a data collection system, in particular to a data collection method and system based on a distributed data collection system. Background technique [0002] Data Acquisition (DAQ) refers to the process of automatically collecting non-electric or electrical signals from analog and digital units under test such as sensors and other devices under test, and sending them to the host computer for analysis and processing. Data Acquisition System (DAS) is a flexible and user-defined measurement system combined with measurement software and hardware products based on computers or other special test platforms. The task of the data acquisition system is to convert the analog signals output by various types of sensors into digital signals and input them into the computer for processing to obtain specific data results. At the same time, the calculated waveforms and values ​​are displayed, and the status of various physical quantities is mon...

AI Technical Summary

Problems solved by technology

The disadvantage is that the analog signal is transmitted between the sensor and the data collector, and the attenuation of the signal changes with the transmission distance during the transmission process. In order to reduce attenuation and interference, the signal transmission cable and cable connector have strict requirements. Therefore, each sensor needs a transmission channel composed of a dedicated signal line. The networking is not flexible enough, there are many cables, wiring is difficult, and the cost is high.

But the disadvantage is: the digital transmission channel basically adopts the field bus with low transmission rate, it is difficult to achieve synchronization between the collectors, and it is even more difficult to realize the synchronous acquisition of multiple sensor signals, so it is not suitable for occasions that require multi-channel cooperative work

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