用PC測量交變磁場

用PC測量交變磁場

用PC測量交變磁場

摘要：本文敘述用采集線圈（磁傳感器）,1臺(tái)個(gè)人電腦，音效（聲卡），等簡單設(shè)備測量交流電線周圍存在的磁場和通電螺線管產(chǎn)生的交變磁場，實(shí)現(xiàn)磁場相對(duì)大小，交變頻率可視。交流電線周圍存在1個(gè)很弱的交變磁場，通電螺線也會(huì)產(chǎn)生1個(gè)較強(qiáng)的交變磁場，我們通過磁感應(yīng)器采集信號(hào)，再輸入聲卡，聲卡對(duì)信號(hào)進(jìn)行模數(shù)轉(zhuǎn)換，將采集模擬信號(hào)轉(zhuǎn)換成數(shù)字信號(hào)輸入電腦并顯示出來，通過對(duì)測的數(shù)據(jù)，圖形進(jìn)行比較和分析，得出磁場的變換頻率和相對(duì)大小。

關(guān)鍵詞：個(gè)人電腦；聲卡；磁場；A/D轉(zhuǎn)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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