设计了一种基于ZYNQ7020的超声阵列测温系统,实现对尾焰温度的实时、精确检测。本设计以基于ZYNQ7020的8通道数据采集卡作为中控系统,搭配A/D芯片、放大滤波电路、功率放大电路完成对原始数据的采集。利用并行化多通道A/D数据采集系统设计了并行化收发时序,在ZYNQ中集成了Linux系统,设计DMA内核驱动程序,将采集到的回波数据上传至上位机。利用信号调制及互相关算法、最小二乘法在上位机进行二维温度场的信息重建并获得相应的温度场图像。经过测试,设计的超声测温系统可以有效获取回波信号并对其进行算法处理,完成对二维温度场的重建。

In the paper,an ultrasonic array temperature measurement system based on ZYNQ is designed to realize real-time and accurate detection of tail flame temperature.In the design,the 8-channel data acquisition card based on ZYNQ7020 is used as the central control system,and the A/D chip,amplification filter circuit and power amplification circuit are used to complete the acquisition of the original data.Using the parallel multi-channel A/D data acquisition system,the parallel transmission and reception timing is designed,the Linux system is integrated in ZYNQ,the DMA kernel driver is designed,and the collected echo data is uploaded to the upper computer.Using signal modulation,cross-correlation algorithm and least square method,the information of two-dimensional temperature field is reconstructed in the upper computer and the corresponding temperature field image is obtained.After testing,the designed ultrasonic temperature measurement system can effectively obtain the echo signal and complete the reconstruction of the two-dimensional temperature field.