多通道七孔探针测速系统研究  

Velocity measurement system of multi channel by seven-hole probes

作　　者：章鹏[1] 李鹏[1] 穆日敏 秦晓楠[1] 

机构地区：[1]南京航空航天大学自动化学院,南京211106

出　　处：《电子测量技术》2017年第5期51-55,共5页Electronic Measurement Technology

摘　　要：为了满足低速流场的测速要求,基于七孔探针测速原理,设计了一套多通道七孔探针测速系统,给出了七孔探针测速系统的嵌入式硬件电路及基于Modbus通信协议的上下位机软件系统的详细设计方案,通过对传感器的压力系数标定提高了压力测量数据的一致性。在低速风洞中进行了探针标定实验,通过对标定实验数据的分析,得出探针的俯仰角和方位角的绝对误差为0.2°。并在此基础上进一步分析了探针孔径误差和传感器测量误差对系统测量结果造成的影响。In order to meet the test requirements for low speed flow field, based on the seven hole probe velocity measuring principle, this paper designed a set of multi-channel probe velocity measuring system by seven-hole probes, which is given a detailed design of the embedded hardware circuits, upper and lower computer software system, which is based on the Modbus communication protocol, improved the consistency of pressure measurement data through the pressure coefficient of sensor calibration. The probe calibration experiment was carried out in the low speed wind tunnel, by analysis the results of probe calibration wind tunnel experiment, the absolute error of the probe＇s pitch angle and azimuth is 0. 2°. On the basis of the results, this paper puts a further analysis on the probe aperture and sensor measurement errors to the effects of measurement results.

关 键 词：七孔探针 电路设计 MODBUS 风洞实验 

分 类 号：TN911.3[电子电信—通信与信息系统]