床面泥沙颗粒受力特性试验研究的量测分析系统

为了研究床面颗粒的受力特性，需要同时量测床面颗粒在水平和垂直两个方向所受的瞬时力，为此研制了精度高、动态特性良好的二维测力传感器。采用二维激光流速会计师测两个方向的瞬时流速。编制了计算四维随机变量统计参数的系统软件，能实时量测和分析四维随机变量的各种统计参数。采用该量测分析系统对床面颗粒的受力及颗粒附近的流速场进行了试验研究，取得了一些初步的成果。

The Measuring and Analyzing System of Forces on Bed Particles

In order to investigate the characteristics of forces acted on bed particles, it is necessary to measure these forces in two directions. The tow dimensional sensor measuring forces developed by authors is highly sensitive and frequency responding , well stability and can be used in water for long time.A two dimensional Laser Doppler Anemometer is used to measure the instantaneous velocities along the vertical and longitudinal. It does not disturb the flow field and is unnecessary to calibrate.A program to sample four signals and to calculate the statistical parameters of four variables was developed. The relationship of the forces acted on bed particles and the statistical parameters can be established.The measuring and analyzing system provided by this paper is useful for investigate the bed load movement.