Abstract:Based on the realistic demand for simultaneous sampling of gas samples at multiple locations in an armored vehicle in an external field test, according to the working principle of the solenoid valve energizing valve opening and closing valve and the delay control principle of time relay, and using a solenoid valve to control a certain specification of vacuum negative pressure sampling bottle to start and stop sampling, time relay control multiple sampling lines to automatically start sampling in a preset order to design a gas sampling system based on multi-point distributed layout. In the pre-experimental process, it is divided into two stages: sub-system testing and system joint debugging. And the system stability and sampling reliability are tested comprehensively. From the test results, the system works stably, the sample collected is credible, the sample quantity can meet the instrument analysis requirements, the test error introduced by the sampling system is small, and the test result is real and reliable. The system can fully meet the test requirements of automatically collecting gas samples in multiple locations and multiple times in a certain armored vehicle. It provides material conditions for the smooth implementation of the test, and effectively solves the problem of multi-position and multi-time simultaneous acquisition of confined space gas..
