李貴子1，2， 王  季1，2
（1. 甘肅省機(jī)械產(chǎn)品檢測(cè)與技術(shù)評(píng)價(jià)重點(diǎn)實(shí)驗(yàn)室，甘肅 蘭州 730030； 2. 甘肅省機(jī)械科學(xué)研究院，甘肅 蘭州 730030）
摘  要：針對(duì)PWM風(fēng)扇性能評(píng)價(jià)中對(duì)高精度、智能化的要求，利用VHDL語言的復(fù)雜系統(tǒng)可編程邏輯器件CPLD,開發(fā)一種等精度自適應(yīng)小型風(fēng)扇轉(zhuǎn)速測(cè)量系統(tǒng)。該系統(tǒng)采用VHDL語言編寫程序,選用Quartus II作為開發(fā)平臺(tái),并給出系統(tǒng)的軟硬件方案。通過仿真試驗(yàn)表明：系統(tǒng)測(cè)量工作可靠,有良好的測(cè)量精度、靈敏度、分辨率，便于現(xiàn)場(chǎng)測(cè)試。
關(guān)鍵詞：VHDL語言；PWM風(fēng)扇；等精度測(cè)速
中圖分類號(hào)：TM925.11；TM930.114；TP274+.2；TP302.7   文獻(xiàn)標(biāo)志碼：A   文章編號(hào)：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