Design Of Gas Test System In Weapon Test Environment

With the accelerated pace of upgrading new weapons and equipment,the demand for weapons testing is growing each year.Therefore,the attention to the man-machine environment for weapons testing is gradually increasing.Weapon test environments such as armored vehicle cabins,tank cabins,and tunnels have limited space and poor mobility,which brings about safety problems caused by the rapid accumulation of harmful gases.Currently,a handheld measuring meter or an optical measuring instrument is generally used for testing the gas concentration.These instruments have problems that require personnel operation or large volume,and are not suitable for gas concentration testing for weapons test environment.To solve the above problems,a multi-gas,miniaturized and automatic recording gas concentration test system for weapon test environment is designed.Focusing on the establishment of this system,this paper is completed the following main tasks:1.Proposed the overall design scheme of the system,which was implemented by the design of hardware equipment and application software.Electrochemical sensors were selected for hardware equipment to build a gas test array.Through the combination of acquisition and storage technology and multiple trigger modes,the real-time and automatic recording of various gas signals was realized,which improved the flexibility and automation of the system.In addition,this paper developed the application software on the Lab VIEW software platform to complete the control of the equipment,and realized the functions of data reading,channel curve display and storage.2.To solve the slow response problem,this paper developed a new gas dynamic characteristic measurement device to obtain the response characteristic curve of the gas sensor.Combined with particle swarm optimization（PSO）inverse modeling method,a dynamic compensation filter model was constructed to improve the dynamic response time constant of the sensor.Through the model verification experiment,the dynamic response time of the compensated system met the requirement of less than 10s as stipulated by the military standard.3.In the laboratory environment,four gases O₂,CO,NO,and NO₂ were tested to verify the feasibility of the system by burning gunpowder to simulate the gas generation in the weapon test environment.Besides,in the test environment of a certain type of armored vehicle firing artillery continuously,the cabin gas test lasted more than 4 hours.The results showed that the concentration changes of NO and CO coincided with the firing time of the artillery,and the CO concentration in the cabin of the armored vehicle reached over 400ppm.After experimental verification,the system achieved the purpose of real-time testing of gas concentration changes,which can be applied to gas dynamic testing in weapons testing environments.