基于无线传感器的航空发动机轴承温度实时监测系统设计

Real-time monitoring system of aero-engine bearing temperature based on wireless sensor

摘要:

为有效校正航空发动机轴承温度误差曲线，得到准确的温度测量结果，使得发动机元件的寿命周期得到充分延长，设计基于无线传感器的航空发动机轴承温度实时监测系统。将JTAG串口电路中的输出电量，按照实际应用需求，分配至电量集中器与ARM无线传感器元件中。借助温度采集节点芯片整合未完全利用的电量信号，并将其寄存于温感信号协调器内部，完成实时温测系统的硬件开发。根据ZigBee协议栈、Z-Stack协议栈的约束标准，确定温度阈值的计算结果，完善温度实测数据的时序条件，采集航空发动机轴承温度数据。再根据温测节点布置情况，对发动机轴承温测数据实施建模处理，完成基于无线传感器的航空发动机轴承温度实时监测系统设计。实验结果表明，在无线传感器元件的作用下，航空发动机轴承的温度误差曲线得到较好校正，所得温测数据确实贴合实际情况，对于延长发动机元件的寿命周期能够起到一定的促进性影响作用。

Abstract:

In order to effectively correct the temperature error curve of aeroengine bearing, obtain accurate temperature measurement results and fully prolong the life cycle of engine components, an aeroengine bearing temperature real-time monitoring system based on wireless sensor is designed. The output power in the JTAG serial port circuit is distributed to the power concentrator and ARM wireless sensor elements according to the actual application requirements. With the help of the temperature acquisition node chip, the underutilized power signal is integrated and stored in the temperature sensing signal coordinator to complete the hardware development of the real-time temperature measurement system. According to the constraint standards of ZigBee protocol stack and Z-stack protocol stack, determine the calculation results of temperature threshold, improve the timing conditions of measured temperature data, and collect aeroengine bearing temperature data. Then, according to the arrangement of temperature measurement nodes, the modeling and processing of engine bearing temperature measurement data are implemented, and the design of aeroengine bearing temperature real-time monitoring system based on wireless sensor is completed. The experimental results show that under the action of wireless sensor elements, the temperature error curve of aeroengine bearing is well corrected, and the obtained temperature measurement data really fits the actual situation, which can play a certain role in prolonging the life cycle of engine elements.