This paper introduces briefly the principle of the telemetering system for coal ash and gas explosion experimentaltunnel and then make an exhaustive analysis of transmission errors of the system.
本文简要介绍煤尘、瓦斯爆炸试验巷道遥测系统的基本工作原理，着重分析该系统的传输误差。
2
In the two actual tunnel, we measured and calculated visibility of the small target under the three light source, and made a visual experimental method of the small target color.