李貴子1，2， 王  季1，2
（1. 甘肅省機械產品檢測與技術評價重點實驗室，甘肅 蘭州 730030； 2. 甘肅省機械科學研究院，甘肅 蘭州 730030）
摘  要：針對PWM風扇性能評價中對高精度、智能化的要求，利用VHDL語言的復雜系統可編程邏輯器件CPLD,開發一種等精度自適應小型風扇轉速測量系統。該系統采用VHDL語言編寫程序,選用Quartus II作為開發平臺,并給出系統的軟硬件方案。通過仿真試驗表明：系統測量工作可靠,有良好的測量精度、靈敏度、分辨率，便于現場測試。
關鍵詞：VHDL語言；PWM風扇；等精度測速
中圖分類號：TM925.11；TM930.114；TP274+.2；TP302.7   文獻標志碼：A   文章編號：1674-5124（2013）04-0109-04
PWM fan equal-precision speed measurement device based on VHDL language
LI Gui-zi1，2， WANG Ji1，2
（1. Key Laboratory of Mechanical Product Testing and Technical Evaluation，Gansu Province，
Lanzhou 730030，China；
2. Gansu Academy of Mechanical Sciences，Lanzhou 730030，China）
Abstract: According to the requirements of high precision and intelligentialize in the process of PWM fan performance evaluation， complex programmable logic device CPLD of VHDL language was used to develop an equal-precision and self adaptive measurement system to measure the speed of small fan. The system use VHDL language to program， select Quartus II as the development platform with solution for hardware and software of the system. The simulation and experiment show the measurement of system is reliable and the measurement precision， sensitivity and resolution ratio are excellent. Therefore the system is convenient for field test.
Key words: VHDL； PWM fan； precision measurement