基于ZYNQ飞艇囊体应变在线监测系统设计

摘要:

针对当前高空飞艇囊体的应变实时测量装置无法同时具备体积小和实时测量的工作属性，创新性地用光学器件和感光元件配合，对工作中飞艇囊体两个固定点的相对位移量进行测量，提出了一种能够在线监测飞艇囊体应变的测量装置，能够实现应变在线测量且测量精度高。采用TCD1500C电荷耦合器件作为数据来源。主芯片采用ZYNQ处理器，ZYNQ能够具备FPGA的并行处理能力和Cortex的数据调度能力，能够处理CCD高速数据。通过自定义IP核,使用PS端与PL端互联AXI协议，实现了高速、大量数据传输。为了得到应变信号，采用了将应变信号转化为位移信号进行采集的方法，之后将位移信号采集存储至SD卡中并周期性显示到上位机上，实现地面对飞艇囊体应变的实时监控。实现了飞艇囊体应变的实时测量并把测量精度提高至0.1%。

Abstract:

The current real-time strain measurement device of high-altitude airship capsule cannot have the working attributes of small size and real-time measurement at the same time. We have proposed a measuring device that can monitor the strain of the airship capsule on-line, which can realize on-line strain measurement with high measurement accuracy by measuring the relative displacement of the two fixed points of the airship capsule during work,. This method innovatively uses optics and photosensitive elements to convert strain into displacement for measurement. The TCD1500C charge coupling device is used as the data source. The main chip uses ZYNQ processor, which can have the parallel processing capability of FPGA and the data scheduling capability of Cortex, as well as processing CCD high-speed data. By customizing an IP core and using the AXI interconnection protocol between the PS terminal and the PL terminal, it is capable of high-speed and large-scale data transmission. In order to obtain the strain signal, a method of transforming the strain signal into the displacement signal is adopted, and then the displacement signal is collected and stored in the SD card and periodically displayed on the host computer to realize the real-time monitoring of the airship capsule strain on the ground. In consequence，the real-time measurement of the strain of the airship capsule is enabled and the measurement accuracy is improved to 0.1%.