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根据当前飞机机载测试产品中分布式网络化应变测试系统的要求设计了一种前端多通道的通用应变采集模块。使用Maxim公司高度集成的单传感器调理芯片MAX1452通过软件实现了激励电压提供,电路偏置,增益调节和温度修正等飞机应变信号测试所必需的功能。该采集模块实际应用表明,在高精度采集下实现了各应变采集通道的完全独立,也同时实现了其体积和功耗相当微小的特点,其通过测试网络系统可以安装在对空间要求比较严格的飞机各个部位。
According to the requirements of the distributed networked strain measurement system in the aircraft on-board test products, a universal multi-channel strain gage acquisition module is designed. The MAX1452, Maxim’s highly integrated single-sensor chip, provides the software necessary functions for testing aircraft strain signals such as excitation voltage supply, circuit offset, gain adjustment, and temperature correction. The practical application of the acquisition module shows that under high-precision acquisition to achieve a complete independence of the strain acquisition channel, but also achieved its volume and power consumption is very small characteristics, which through the test network system can be installed in the more stringent space requirements Various parts of the aircraft.