小卫星地面供电电缆温度监测系统设计

Design of Temperature Monitoring System for Small Satellite Ground Power Supply Cable

摘要:

随着小卫星研制数量的增多,地面电缆的敷设数量越来越多,一旦绝缘老化而发生热击穿将造成很大的损失;卫星地面供电电缆的运行温度是一个重要参数,必须对其进行监视;为此,研制了小卫星地面供电电缆温度监测系统,该系统采用T型热电偶对电缆重点监测部位进行测温,并将测温数据通过温度数采盒转换为RS-485信号进行远程传输,利用工业串口服务器和以太网交换机接入测试网络,实现测温数据的便捷访问,通过基于LabVIEW开发的温度监视软件实现温度数据实时监视以及其他综合应用;最后,为了获取小卫星地面供电用电缆载流数据,进行了该类型电缆载流试验,试验数据表明了电缆温度的重要性。

Abstract:

Ground cable has become more and more with increasing number of developing small satellite. It will cause a great loss once hot breakdown happens as insulation aging. As one of the important parameters, the temperature of ground power supply cable is necessary to be monitored. Therefore the paper developed a ground cable temperature monitoring system, it adopted T-type thermocouple to monitor the important positions of the power supply cable, transfers data to RS-485 signal through DAQ box, connects to test network using serial server and Ethernet switch, realizes convenient access, developed monitoring software based on LabVIEW to real time monitoring and other comprehensive application. Finally, a current carrying test of this type cable has to be done in order to obtain current carrying data , and the test data further indicates the important of cable temperature.