基于HC32L136的液体推进剂泄漏监测节点设计

Design of liquid propellant leakage monitoring node based on HC32L136

为了提高对液体推进剂泄漏的监控能力,针对传统的单通道气敏单元监测节点因气敏单元故障存在漏报或误报的不足,提出一种基于HC32L136的多通道气敏单元的液体推进剂泄漏监测节点设计。利用HC32L136内置的ADC采集两种电化学传感器(偏二甲肼和二氧化氮)共6路气体浓度数据并进行表决运算;RTC周期性唤醒HC32L136,透过UART接口由2.4 G无线模块将采集的数据传输至终端并报警显示。测试结果表明,监测节点周期监测两种推进剂气体浓度、电池电量等参数,不超过0.5×10^(-6)的测量误差结果在允许的范围内。该节点具有功耗低、元器件全国产化、安装方便、传输距离大于1.0 km长距离无线数据传输等优点,为液体推进剂泄漏监测提供一种新的技术手段。

In order to improve the monitoring ability of liquid propellant leakage,a multi-channel gas-sensing node based on HC32 L136 is designed to monitor the leakage of liquid propellant.The ADC inside of HC32 L136 is used to collect the data of the six-channel two kind of electrochemical gas sensor(UDMH and NO;)and to calculate the voting algorithm;the RTC mode is used to wake-up the HC32 L136 periodically to transmit the collected data to the terminal and alarm information display by the wireless module through the UART interface.The test results show that the monitoring node can monitor 2 kinds of propellant gas concentration,battery power and other parameters in real-time,and the measurement error not exceeding 0.5×10^(-6)is within the allowable range.The node has the advantages of low power consumption,localization of electronic components,easy installation and long distance wireless data transmission over 1.0 km,which provides a new technique for liquid propellant leakage monitoring.