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用PC測量交變磁場(chǎng)
用PC測量交變磁場(chǎng)
摘要:本文敘述用采集線(xiàn)圈(磁傳感器),1臺個(gè)人電腦,音效(聲卡),等簡(jiǎn)單設備測量交流電線(xiàn)周?chē)嬖诘拇艌?chǎng)和通電螺線(xiàn)管產(chǎn)生的交變磁場(chǎng),實(shí)現磁場(chǎng)相對大小,交變頻率可視。交流電線(xiàn)周?chē)嬖?個(gè)很弱的交變磁場(chǎng),通電螺線(xiàn)也會(huì )產(chǎn)生1個(gè)較強的交變磁場(chǎng),我們通過(guò)磁感應器采集信號,再輸入聲卡,聲卡對信號進(jìn)行模數轉換,將采集模擬信號轉換成數字信號輸入電腦并顯示出來(lái),通過(guò)對測的數據,圖形進(jìn)行比較和分析,得出磁場(chǎng)的變換頻率和相對大小。
關(guān)鍵詞:個(gè)人電腦;聲卡;磁場(chǎng);A/D轉換
The measurement of the alternating magnetic field using a personal computer
Abstract:This paper describes the measurement of ac electric wires around the field using Acquisition coil (magnetic sensors) ,a personal computer,Sound (sound card) ,Amplifiers and other simple equipment . Make the magnitude of the magnetic field and AC Frequency Visualization,An electrical current in a wire produces a weak magnetic field H around the wire, We use magnetic sensors to Acquisition the Weak signal ,then ,input sound card ,the analog signals have been transformed into digital signals by the sound card and been displayed by the personal computer.
Keywords : PC;sound card; magnetic field; A/D conversion
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