基于质量流量控制的火花试验自动标校系统设计

Design of Automatic Calibration System for Spark Test Based on Mass Flow Control

针对火花试验装置灵敏度检查标定电路参数采用分散式仪表接入测试,检测时需将防爆透明罩体摘除这一安全问题,提出了基于质量流量控制的火花试验自动标校系统设计。系统硬件设计采用内嵌高精度仪器仪表对灵敏度参数指标进行统一采集,实现系统的自动化控制和联锁保护。系统软件采用虚拟仪器技术进行模块化分层设计,可实时监测和控制测试系统。通过对不同防爆类别下对应的可燃性气体配比参数进行试验,结果表明最大偏差为0.065%。

In view of the safety problem that the sensitivity inspection and calibration circuit parameters of spark test device adopt decentralized instrument access test, and the explosion-proof transparent cover needs to be removed during detection, put forward the design of spark test automatic calibration system based on mass flow control. The hardware design of the system adopts embedded high-precision instruments to uniformly collect the sensitivity parameters, so as to realize the automatic control and interlocking protection of the system. The system software adopts virtual instrument technology for modular layered design, which can monitor and control the test system in real time. By testing the corresponding combustible gas ratio parameters under different explosion-proof categories, the results show that the maximum deviation is 0.065%.