超声波时差法的三维矢量风测量系统  

Three-dimensional Vector Wind Measurement System Based on Ultrasonic Time-difference Method

作　　者：邓云逸 姚振东[1] 刘凯[1] 邱玲[1] 皮波[1] 

机构地区：[1]成都信息工程大学中国气象局大气探测重点开放实验室,成都610225

出　　处：《单片机与嵌入式系统应用》2016年第4期25-28,共4页Microcontrollers & Embedded Systems

摘　　要：超声波测量水平风的技术已经在地面气象观测业务中应用多年,效果很好。将这种技术稍加变通,将测量的平面三角形结构变成正四面体结构的不相交两边,使之形成具有三维测量能力的特殊结构。采用步进频率测量技术,将发射的100kHz频段的超声波进行扩频调制,通过相关接收后获得脉冲压缩,兼顾了较低峰值发射功率的接收灵敏度问题,以及超声波脉宽造成的时间测量精度问题,还具有一定的抗干扰能力。仿真和实验室初步实验结果证实了这种方法的可行性。Ultrasonic level wind measurement technology has been used in the meteorological observation business for many years,which achieves good effects, The flat triangular configuration will be transformed into the tetrahedron structure, and then it forms a special structure with three-dimensional measurement capability. The design uses stepping frequency measurement technology to emit the ultra- sonic frequency of 100 kHz to spread spectrum modulation. After receiving the data, the design ohtaines the pulse compression, it has solved the following two problems：the lower peak transmit power＇s receiver sensitivity and the measuring time accuracy causing by the ultrasonic pulse. It also has the anti-jamming capability. The feasibility of this method is confirmed by the simulation and laboratory experiments.

关 键 词：三维矢量风 超声波换能器 时差法 正四面体结构 

分 类 号：P412.1[天文地球—大气科学及气象学]