化工儀器網(wǎng)
詳細(xì)介紹
模擬上電延時計時器autonics,BJ30-BDT,奧拓尼克斯autonics步進(jìn)電機(jī),BJ30-BDT-P
現(xiàn)代技術(shù)
現(xiàn)代計時器的種類包括電磁打點(diǎn)計時器、電火花計時器、堅持計時器、停車計時器、反應(yīng)計時器、放大計時器以及windows計時器等等。電磁打點(diǎn)計時器和電火花打點(diǎn)計時器zui為常見。
電磁打點(diǎn)計時器是一種使用交流電源的計時儀器，其工作電壓是4-6V，電源的頻率是50Hz，它每隔0.02s打一次點(diǎn)。工作原理：當(dāng)給電磁打點(diǎn)計時器的線圈通電后，線圈產(chǎn)生磁場，線圈中的振片被磁化，振片在*磁鐵磁場的作用下向上或向下運(yùn)動，由于交流電的方向每個周期要變化兩次，因此振片被磁化后的磁極要發(fā)生變化，*磁鐵對它的作用力的方向也要發(fā)生變化，當(dāng)振片受向下的力時打點(diǎn)一次，當(dāng)振片受向上的力時不打點(diǎn)，所以在交流電的一個周期內(nèi)打點(diǎn)一次，即每兩個點(diǎn)間的時間間隔等于交流電的周期。
電火花計時器是利用火花放電在紙帶上打出小孔而顯示出點(diǎn)跡的計時儀器，使用220V交流電壓，當(dāng)頻率為50Hz時，它每隔0.02s打一次點(diǎn)，電火花計時器工作時，指導(dǎo)運(yùn)動所受到的阻力比較小，試驗誤差比電磁打點(diǎn)計時器的要小。工作原理：電火花打點(diǎn)計時器是利用火花放電使墨粉在紙帶上打出墨點(diǎn)而顯出點(diǎn)跡的一種計時儀器. 給電火花打點(diǎn)計時器接220V電源，按下脈沖輸出開關(guān)，計時器發(fā)出的脈沖電流，接正極的放電針和墨粉紙盤到接負(fù)極的紙盤軸，產(chǎn)生火花放電，于是在紙帶上打出一系列的點(diǎn)，而且在交流電的每個周期放電一次，因此電火花打點(diǎn)計時器打出點(diǎn)間的時間間隔等于交流電的周期。
模擬上電延時計時器autonics,BJ30-BDT,奧拓尼克斯autonics步進(jìn)電機(jī),BJ30-BDT-P
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| BJ30-BDT-P |
| BJ50-BDT |
| BJ50-BDT-P |
| BJ100-BDT |
| BJ100-BDT-P |
| PRT08-1.5DO |
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| PRT12-2DO |
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| PRT30-10DO |
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| PR08-1.5DN |
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| PR08-2DN |
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| PR12-2AO |
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BDT-P
| PR18-5AO |
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| PR18-8AO |
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| PR30-10AO |
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| PRL18-5AO |
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| PRAT30-10DO |
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| PRAWT30-10DO |
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| PRCMT12-2DO |
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| PRCMT30-10DO |
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| PRCM30-10DN |
| PRCM30-10DP |
| PRCM30-10DN2 |
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| PRCM30-15DN |
| PRCM30-15DP |
化工儀器網(wǎng)