A Synchronous Acquisition Method Based on Wireless Sensor Network

Abstract

A method for synchronous acquisition based on a wireless sensor network, comprising the following steps: step 1, using the wireless sensor network smartMeshIP with the characteristics of time synchronization throughout the network to provide a unified time basis for the system; step 2, designing wireless node hardware with network time synchronization capabilities , as the basis for realizing the synchronous acquisition method; the hardware includes a main processor and a wireless radio frequency module; the main processor and the radio frequency module are connected through a serial port, and the information exchange between the main processor and the radio frequency module is realized based on the serial port; step 3, Use the RTC in the main processor to realize the timing wake-up mechanism of the main processor; step 4, after the main processor is woken up, complete the timing interval accuracy calibration, time synchronization processing, start the synchronous acquisition action and complete the data calculation and collection data upload. The wireless-based synchronous triggering accuracy achieved through the above process can reach within 10 microseconds, which is very close to the synchronization accuracy requirements of the wired system.

Description

technical field [0001] The invention belongs to the technical field of wireless synchronous trigger acquisition, in particular to a synchronous acquisition method based on a wireless sensor network. Background technique [0002] The health status monitoring method for important and key equipment in the industrial field uses real-time acquisition of equipment operating process data (such as vibration, speed, power, temperature, etc.) as the basis for equipment health status assessment. By analyzing these data in the time-frequency domain and extracting high-level information such as characteristic states, the health of the monitored equipment can be more intuitively reflected. [0003] Usually, there are multiple sensing measurement points on a device under test. If the data collected on multiple measurement points has a strong time correlation, that is, the actions of starting collection at different measurement points are approximately triggered at the same time in absolute...

AI Technical Summary

Problems solved by technology

For example, the cost of manpower and materials for deployment and implementation remains high, and the cost of cable maintenance in the later stage is high. In addition, there are many places where the deployment of wired systems is not allowed on industrial sites.

[0005] As the subsequent wireless transmission technology, due to the use of wireless communication to achieve interconnection, the delay of synchronization commands and the unreliability of the wireless transmission network greatly limit the improvement of wireless synchronization trigger accuracy. The industry lacks mature and reliable ten microsecond level Wireless Synchronous Trigger Acquisition Technology

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