{"id":3280,"date":"2021-08-16T08:51:33","date_gmt":"2021-08-16T08:51:33","guid":{"rendered":""},"modified":"2021-08-16T16:52:09","modified_gmt":"2021-08-16T08:52:09","slug":"%e5%8d%95%e7%89%87%e6%9c%bapwm%e8%b0%83%e5%85%89%e7%94%b5%e8%b7%af%e5%9b%be","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3280","title":{"rendered":"\u5355\u7247\u673apwm\u8c03\u5149\u7535\u8def\u56fe"},"content":{"rendered":"

\n\t1 \u7cfb\u7edf\u786c\u4ef6\u7535\u8def\u8bbe\u8ba1<\/span><\/p>\n

\n\t\u8be5\u591a\u529f\u80fd LED \u53f0\u706f\u7cfb\u7edf\u91c7\u752820 \u53ea5mm \u9ad8\u4eae\u767d\u5149LED \u706f\u73e0\u4e3a\u5149\u6e90\uff0c\u4ee5AT89S51 \u5355\u7247\u673a\u4e3a\u4e3b\u63a7\u82af\u7247\uff0c\u7531LED \u6052\u6d41\u9a71\u52a8\u7cfb\u7edf\u3001\u65f6\u949f\u7cfb\u7edf\u3001\u6d4b\u6e29\u7cfb\u7edf\u3001\u6db2\u6676\u663e\u793a\u7cfb\u7edf\u3001\u8702\u9e23\u7cfb\u7edf\u3001\u6309\u952e\u7cfb\u7edf\u7ec4\u6210\u3002\u7cfb\u7edf\u7ed3\u6784\u6846\u56fe\u5982\u56fe1 \u6240\u793a\u3002<\/span><\/p>\n

\n\t\u8be5\u7cfb\u7edf\u53ef\u5177\u4f53\u5b9e\u73b0LED \u53f0\u706f\u768410 \u7ea7PWM \u8c03\u5149\u63a7\u5236\uff1b\u6db2\u6676\u5c4f\u5b9e\u65f6\u663e\u793a\u65f6\u949f\u3001\u65e5\u5386\u4e0e\u73af\u5883\u6e29\u5ea6\u4fe1\u606f\uff1b\u95f9\u949f\u529f\u80fd\u91c7\u7528\u58f0\u5149\u62a5\u8b66\u65b9\u5f0f\uff0c\u5373\u4e00\u65e6\u5230\u8fbe\u95f9\u949f\u65f6\u95f4\uff0cLED \u53f0\u706f\u81ea\u52a8\u70b9\u4eae\uff0c\u5e76\u53d1\u51fa\u8702\u9e23\u58f0\u62a5\u8b66\uff0c\u4ee5\u5524\u9192\u7528\u6237\uff1b\u7528\u6237\u53ef\u901a\u8fc7\u6309\u952e\u7cfb\u7edf\u5b9e\u73b0\u5bf9\u65f6\u949f\u65e5\u5386\u4e0e\u95f9\u949f\u53c2\u6570\u7684\u8bbe\u7f6e\u3001LED \u4eae\u5ea6\u7684\u8c03\u8282\u4ee5\u53ca\u95f9\u949f\u62a5\u8b66\u7684\u89e3\u9664\u3002<\/span><\/p>\n

\n\t<\/p>\n

\n\t\u56fe1 \u7cfb\u7edf\u7ed3\u6784\u6846\u56fe<\/span><\/p>\n

\n\t1.1 \u5355\u7247\u673a\u4e3b\u63a7\u7cfb\u7edf<\/span><\/p>\n

\n\t\u672c\u8bbe\u8ba1\u4e3b\u63a7\u7cfb\u7edf\u91c7\u7528ATMEL \u516c\u53f8\u7684\u9ad8\u6027\u80fdAT89S51 \u82af\u7247\u5b9e\u73b0\uff0c\u5176P0 \u53e3\u5916\u63a510K \u7684\u4e0a\u62c9\u7535\u963b\uff0cP0.0~P0.7 \u540c\u65f6\u4f5c\u4e3aDS12C887 \u7684\u6570\u636e\u63a5\u53e3\u4e0e\u6db2\u66761602 \u7684\u6570\u636e\u63a5\u53e3\u3002P2.0~P2.3\u5206\u522b\u8fde\u63a5DS12C887 \u82af\u7247\u7684\u7247\u9009\u7aefCS\u3001\u5730\u5740\u9009\u901a\u8f93\u5165\u7aefAS\u3001\u6570\u636e\u9009\u62e9\u7aefDS \u4e0e\u8bfb\/\u5199\u8f93\u5165\u7aefR\/W,P3.2 \u8fde\u63a5\u5176\u95f9\u949f\u4e2d\u65ad\u8bf7\u6c42\u8f93\u51fa\u7aefIRQ.P2.5~P2.7 \u5206\u522b\u8fde\u63a5\u6db2\u66761602 \u7684\u4f7f\u80fd\u7aefEN\u3001\u6570\u636e\/\u547d\u4ee4\u9009\u62e9\u7aefRS\u3001\u8bfb\/\u5199\u9009\u62e9\u7aefRW.P2.4 \u4f5c\u4e3a\u8702\u9e23\u5668\u63a7\u5236\u7aef\u3002P3.0 \u4f5c\u4e3aDS18B20 \u7684\u4fe1\u53f7\u8f93\u5165\u7aef\u3002P3.1\u3001P3.4\u3001P3.5\u3001P3.6 \u4e0eP3.7 \u4f5c\u4e3aS2~S6 \u6309\u952e\u7cfb\u7edf\u3002P1.1 \u4f5c\u4e3aPWM \u4fe1\u53f7\u7684\u8f93\u51fa\u7aef\u5e76\u8fde\u63a5PT4115 \u82af\u7247DIM \u7aef\uff0c\u7528\u4e8ePWM \u8c03\u5149\u63a7\u5236\u3002\u7cfb\u7edf\u6676\u632f\u7535\u8def\u753112MHZ \u6676\u632f\u4e0e\u4e24\u4e2a30PF \u7535\u5bb9\u7ec4\u6210\uff1b\u590d\u4f4d\u7535\u8def\u5219\u7531S1 \u6309\u952e\u300110K \u7535\u963b\u4e0e10uF \u7535\u89e3\u7535\u5bb9\u6784\u6210\u3002\u4e3b\u63a7\u7cfb\u7edf\u7535\u8def\u5982\u56fe2 \u6240\u793a\u3002<\/span><\/p>\n

\n\t<\/p>\n

\n\t\u56fe2 \u5355\u7247\u673a\u4e3b\u63a7\u7cfb\u7edf\u7535\u8def\u56fe<\/span><\/p>\n

\n\t1.2 \u6052\u6d41\u9a71\u52a8\u7cfb\u7edf<\/span><\/p>\n

\n\t\u672c\u8bbe\u8ba1 L ED \u5149\u6e90\u91c7\u7528\u76f8\u4e92\u5e76\u8054\u65b9\u5f0f\uff0c\u5171\u753120 \u53ea5mm \u9ad8\u4eae\u5ea6\u5c0f\u529f\u7387LED \u706f\u73e0\u7ec4\u6210\uff1b\u6bcf\u53eaLED \u706f\u73e0\u7684\u538b\u964d\u7ea63.1V,\u5de5\u4f5c\u7535\u6d41\u7ea620mA.\u7531\u767d\u5149LED \u7684\u6b63\u5411\u4f0f\u5b89\u7279\u6027\u53ef\u77e5\uff0c\u5f53LED \u7aef\u7535\u538b\u8d85\u8fc7\u5176\u6b63\u5411\u5bfc\u901a\u7535\u538b\u540e\uff0c\u8f83\u5c0f\u7684\u7535\u538b\u6ce2\u52a8\u90fd\u4f1a\u5bfc\u81f4\u5de5\u4f5c\u7535\u6d41\u7684\u7684\u5267\u70c8\u53d8\u5316\uff0c\u4ece\u800c\u5f71\u54cdLED \u7684\u6b63\u5e38\u4f7f\u7528\uff0c\u56faLED \u5b9c\u91c7\u7528\u6052\u6d41\u9a71\u52a8\u65b9\u5f0f\u3002\u56e0\u6b64\uff0c\u672c\u8bbe\u8ba1LED \u91c7\u7528\u9ad8\u6027\u80fdPT4115 \u6052\u6d41\u82af\u7247\u9a71\u52a8\uff0cPT4115 \u662f\u4e00\u6b3e\u8fde\u7eed\u7535\u611f\u7535\u6d41\u5bfc\u901a\u6a21\u5f0f\u7684\u964d\u538b\u6052\u6d41\u6e90\u82af\u7247\uff0c\u80fd\u5c06\u76f4\u6d41\u7535\u538b\u76f4\u63a5\u8f6c\u6362\u6210\u7a33\u5b9a\u7684\u6052\u6d41\u8f93\u51fa\uff1b\u5176\u91c7\u75286~30V \u5bbd\u7535\u538b\u8f93\u5165\uff0c\u8f93\u51fa\u7535\u6d41\u53ef\u8fbe1.2A,\u8f6c\u6362\u6548\u7387\u9ad8\u8fbe97%,\u8f93\u51fa\u7535\u6d41\u7cbe\u5ea6\u8fbe±5%.\u8be5\u82af\u7247\u5185\u90e8\u542b\u6709\u6296\u9891\u7279\u6027\uff0c\u6781\u5927\u7684\u6539\u5584EMI,\u540c\u65f6\u5177\u6709\u8fc7\u6e29\u3001\u8fc7\u538b\u3001\u8fc7\u6d41\u3001LED \u5f00\u8def\u4fdd\u62a4\u7b49\u591a\u79cd\u529f\u80fd\u3002\u8be5\u82af\u7247\u9002\u5408\u7528\u4e8e\u7eff\u8272\u7167\u660eLED\u706f\u7684\u9a71\u52a8\u7535\u8def\uff0c\u5177\u6709\u5e94\u7528\u7535\u8def\u975e\u5e38\u7b80\u6d01\u7684\u4f18\u70b9\u3002LED \u6052\u6d41\u9a71\u52a8\u7535\u8def\u5982\u56fe3 \u6240\u793a\u3002<\/span><\/p>\n

\n\t<\/p>\n

\n\t\u56fe3 LED \u6052\u6d41\u9a71\u52a8\u7cfb\u7edf\u7535\u8def\u56fe<\/span><\/p>\n

\n\t\u901a\u8fc7 PT4115 \u82af\u7247\u4e0a\u7684DIM \u7aef\uff0c\u53ef\u4ee5\u65b9\u4fbf\u7684\u8fdb\u884c\u6a21\u62df\u6216PWM \u8c03\u5149\u3002\u7531\u4e8e\u6a21\u62df\u8c03\u5149\u662f\u76f4\u63a5\u6539\u53d8\u6d41\u8fc7LED \u7535\u6d41\u7684\u5927\u5c0f\u6765\u5b9e\u73b0\u4eae\u5ea6\u8c03\u8282\uff0c\u9664\u4e86\u4eae\u5ea6\u4f1a\u6539\u53d8\u4ee5\u5916\uff0c\u4e5f\u4f1a\u5f71\u54cd\u767d\u5149\u7684\u8d28\u91cf\uff0c\u5373\u4e0d\u540c\u7535\u6d41\u4e0b\u53d1\u51fa\u7684\u767d\u5149\u5b58\u5728\u8272\u504f\u3002\u56e0\u6b64\uff0c\u672c\u8bbe\u8ba1\u91c7\u7528PWM \u8c03\u5149\u65b9\u6848\uff0cPWM \u8c03\u5149\u7684\u57fa\u672c\u539f\u7406\u662f\u4fdd\u6301LED \u6b63\u5411\u5bfc\u901a\u7535\u6d41\u6052\u5b9a\uff0c\u800c\u901a\u8fc7\u63a7\u5236\u7535\u6d41\u5bfc\u901a\u548c\u5173\u65ad\u7684\u65f6\u95f4\u6bd4\u4f8b\uff0c\u5373\u6539\u53d8\u8f93\u5165\u8109\u51b2\u4fe1\u53f7\u7684\u5360\u7a7a\u6bd4\uff0c\u4f7fLED \u4ea7\u751f\u4eae\u6697\u53d8\u5316\uff1b\u5e76\u5229\u7528\u4eba\u773c\u7684\u89c6\u89c9\u6b8b\u7559\u6548\u5e94\uff0c\u5f53LED \u4eae\u6697\u53d8\u5316\u9891\u7387\u5927\u4e8e120Hz \u65f6\uff0c\u4eba\u773c\u5c31\u4e0d\u4f1a\u611f\u89c9\u5230\u95ea\u70c1\uff0c\u800c\u770b\u5230\u662fLED \u7684\u5e73\u5747\u4eae\u5ea6\u3002PWM \u8c03\u5149\u7684\u4f18\u52bf\u662fLED \u6b63\u5411\u5bfc\u901a\u7684\u7535\u6d41\u662f\u6052\u5b9a\u7684\uff0cLED \u7684\u8272\u5ea6\u5c31\u4e0d\u4f1a\u50cf\u6a21\u62df\u8c03\u5149\u65f6\u4ea7\u751f\u53d8\u5316\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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