摘要
对主电桥预移相恒温热线(膜)流速计动态响应方程调节元参量的解析解,及利用本线路模型理论,设计新型 HWFA 的若干原则作了阐述。根据这些原则研制的IFA-900型智能流速计系统,革除了传统 HWFA 所必需的三个调节参量,使用简单,操作方便;频带宽,稳定性好,动态性能有重大改进;软件功能强,智能化功能多,自动化程度有很大提高。
This paper found the analytic solution of danamics equa-tion of constant-temperature hot wire(film)anemometer with mainbridge prephasing circuit,established the design principle.And devel-oped an entirely new IFV-900 hot wire(film)anemometer system.This anemometer abolished three adjustment parameters of the tradi-tional anemometer system,it simplifies greatly the adjusting proce-dure;apparent increase of the none self-excited oscillation range savesoperator a lot of trouble; the bandwidth is 2-5 times wider thanthat of the traditional anemometer;and the automaticity raisesgreatly with the addition of intelligent functions.
关键词
预移相
流速仪
动态响应方程
hot wire(film)anemometer
prephasing
dynamics response
heat dissipation
Butter-worth response characteristic
