{"id":70715,"date":"2026-02-02T09:41:07","date_gmt":"2026-02-02T01:41:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/70715.html"},"modified":"2026-02-02T09:41:07","modified_gmt":"2026-02-02T01:41:07","slug":"%e4%bf%a1%e5%8f%b7%e7%9a%84%e8%b0%83%e5%88%b6%e4%b8%8e%e8%a7%a3%e8%b0%83%ef%bc%88%e4%b8%8a%ef%bc%89%ef%bc%9a%e8%b0%83%e5%88%b6%e7%9a%84%e6%9c%ac%e8%b4%a8-%e7%aa%81%e7%a0%b4%e7%89%a9","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/70715.html","title":{"rendered":"\u4fe1\u53f7\u7684\u8c03\u5236\u4e0e\u89e3\u8c03\uff08\u4e0a\uff09\uff1a\u8c03\u5236\u7684\u672c\u8d28\u2014\u2014\u7a81\u7834\u7269\u7406\u684e\u688f\u7684\u4fe1\u53f7\u201c\u53d8\u8eab\u201d\u827a\u672f"},"content":{"rendered":"

\n

\u5f53\u6211\u4eec\u7528\u624b\u673a\u62e8\u901a\u89c6\u9891\u901a\u8bdd，\u5f53\u6536\u97f3\u673a\u4f20\u51fa\u6e05\u6670\u7684\u97f3\u4e50，\u5f53\u536b\u661f\u5c06\u592a\u7a7a\u89c2\u6d4b\u6570\u636e\u4f20\u56de\u5730\u7403，\u80cc\u540e\u90fd\u85cf\u7740\u4e00\u4e2a\u5173\u952e\u64cd\u4f5c\u2014\u2014\u8c03\u5236\u3002\u5728\u6570\u5b57\u667a\u80fd\u65f6\u4ee3，\u6211\u4eec\u65e9\u5df2\u4e60\u60ef\u4fe1\u606f\u7684\u5373\u65f6\u8fdc\u8ddd\u79bb\u4f20\u8f93，\u5374\u5f88\u5c11\u601d\u8003：\u539f\u672c\u201c\u6b65\u5c65\u8e52\u8dda\u201d\u7684\u4f4e\u9891\u6709\u7528\u4fe1\u53f7，\u4e3a\u4f55\u80fd\u8de8\u8d8a\u5c71\u6d77？\u7b54\u6848\u5c31\u5728\u4e8e\u8c03\u5236\u6280\u672f\u7684\u201c\u53d8\u8eab\u9b54\u6cd5\u201d\u2014\u2014\u5b83\u4e3a\u4f4e\u9891\u4fe1\u53f7\u88c5\u4e0a\u9ad8\u9891\u201c\u7fc5\u8180\u201d，\u7a81\u7834\u7269\u7406\u9650\u5236，\u6210\u4e3a\u4fe1\u606f\u4f20\u64ad\u7684\u6280\u672f\u57fa\u77f3\u3002\u8fd9\u7bc7\u6587\u7ae0，\u6211\u4eec\u5148\u63ed\u5f00\u8c03\u5236\u7684\u57fa\u7840\u903b\u8f91，\u8be6\u89e3\u6a21\u62df\u8c03\u5236\u7684\u7cbe\u51c6\u539f\u7406，\u56de\u671b\u6a21\u62df\u901a\u4fe1\u65f6\u4ee3\u7684\u6280\u672f\u5960\u57fa\u4e4b\u8def\u3002<\/p>\n

\u4e00\u3001\u4e3a\u4ec0\u4e48\u5fc5\u987b\u8c03\u5236？\u4e09\u4e2a\u7ed5\u4e0d\u5f00\u7684\u7269\u7406\u96be\u9898<\/p>\n

\u6211\u4eec\u65e5\u5e38\u7684\u6709\u7528\u4fe1\u53f7，\u65e0\u8bba\u662f\u4eba\u8033\u53ef\u95fb\u7684\u97f3\u9891（20Hz – 20kHz），\u8fd8\u662f\u4f20\u611f\u5668\u91c7\u96c6\u7684\u6e29\u5ea6\u3001\u538b\u529b\u6570\u636e（DC-10kHz），\u90fd\u5c5e\u4e8e\u4f4e\u9891\u4fe1\u53f7\u3002\u8fd9\u4e9b\u4fe1\u53f7\u82e5\u76f4\u63a5\u65e0\u7ebf\u4f20\u8f93，\u4f1a\u906d\u9047\u4e09\u4e2a\u201c\u81f4\u547d\u74f6\u9888\u201d，\u800c\u8c03\u5236\u6b63\u662f\u7834\u89e3\u8fd9\u4e9b\u96be\u9898\u7684\u6838\u5fc3\u65b9\u6848：<\/p>\n

1. \u5929\u7ebf\u5c3a\u5bf8\u7684\u7269\u7406\u6781\u9650：\u4f4e\u9891\u4fe1\u53f7\u7684\u201c\u8fdc\u884c\u67b7\u9501\u201d<\/p>\n

\u4fe1\u53f7\u8981\u901a\u8fc7\u5929\u7ebf\u6709\u6548\u8f90\u5c04，\u5fc5\u987b\u6ee1\u8db3\u201c\u5929\u7ebf\u957f\u5ea6\u2248\u4fe1\u53f7\u6ce2\u957f\/4\u201d\u7684\u7269\u7406\u89c4\u5f8b\u2014\u2014\u8fd9\u662f\u7535\u78c1\u8f90\u5c04\u7684\u57fa\u7840\u539f\u7406，\u65e0\u6cd5\u7a81\u7834\u3002\u6211\u4eec\u901a\u8fc7\u7cbe\u51c6\u8ba1\u7b97\u5c31\u80fd\u770b\u6e05\u5dee\u8ddd：<\/p>\n

20Hz\u97f3\u9891\u4fe1\u53f7：\u6ce2\u957f\u03bb=\u5149\u901fc\/\u9891\u7387f(3\u00d710\u2078m\/s\u00f720Hz)=15000km，\u76f8\u5f53\u4e8e\u5730\u7403\u8d64\u9053\u5468\u957f\u76843\/4，\u5982\u6b64\u5de8\u5927\u7684\u5929\u7ebf\u5b8c\u5168\u65e0\u6cd5\u5236\u9020；<\/p>\n

1MHz\u65e0\u7ebf\u7535\u4fe1\u53f7：\u6ce2\u957f\u03bb = 3\u00d710\u2078m\/s \u00f7 10\u2076Hz = 300m，\u642d\u5efa300\u7c73\u9ad8\u7684\u5e7f\u64ad\u5854\u5373\u53ef\u5b9e\u73b0\u6709\u6548\u8f90\u5c04，\u8fd9\u4e5f\u662f\u65e9\u671f\u4e2d\u6ce2\u5e7f\u64ad\u7684\u6280\u672f\u57fa\u7840，\u6bd4\u5982\u5317\u4eac\u4e2d\u592e\u5e7f\u64ad\u5854\u7684\u9ad8\u5ea6\u5c31\u63a5\u8fd1300\u7c73，\u6b63\u662f\u4e3a\u9002\u914d\u4e2d\u6ce2\u4fe1\u53f7\u8f90\u5c04\u8bbe\u8ba1\u3002<\/p>\n

\"\"<\/p>\n

\u8c03\u5236\u7684\u6838\u5fc3\u4f5c\u7528\u4e4b\u4e00，\u5c31\u662f\u5c06\u4f4e\u9891\u6709\u7528\u4fe1\u53f7\u201c\u52a0\u8f7d\u201d\u5230\u9ad8\u9891\u8f7d\u6ce2\u4e0a，\u8ba9\u4fe1\u53f7\u9002\u914d\u53ef\u5b9e\u73b0\u7684\u5929\u7ebf\u5c3a\u5bf8\u2014\u2014\u5c31\u50cf\u7ed9\u5f92\u6b65\u65c5\u884c\u8005\u914d\u5907\u8d8a\u91ce\u8f66，\u8ba9\u539f\u672c\u65e0\u6cd5\u8de8\u8d8a\u7684\u8ddd\u79bb\u53d8\u5f97\u53ef\u884c\u3002\u8fd9\u91cc\u7684\u201c\u52a0\u8f7d\u201d\u5e76\u975e\u7b80\u5355\u53e0\u52a0，\u800c\u662f\u901a\u8fc7\u6539\u53d8\u9ad8\u9891\u8f7d\u6ce2\u7684\u67d0\u4e00\u53c2\u6570（\u5e45\u5ea6\u3001\u9891\u7387\u3001\u76f8\u4f4d），\u5c06\u6709\u7528\u4fe1\u53f7\u7684\u4fe1\u606f\u201c\u7f16\u7801\u201d\u5230\u8f7d\u6ce2\u4e2d，\u8fd9\u4e2a\u7f16\u7801\u8fc7\u7a0b\u5c31\u662f\u7cbe\u51c6\u7684\u8c03\u5236\u8fc7\u7a0b\u3002\u6bd4\u5982\u6211\u4eec\u8bf4\u8bdd\u7684\u58f0\u97f3（\u4f4e\u9891），\u901a\u8fc7\u9ea6\u514b\u98ce\u8f6c\u6362\u6210\u7535\u4fe1\u53f7\u540e，\u5fc5\u987b\u7ecf\u8fc7\u8c03\u5236\u52a0\u8f7d\u5230\u9ad8\u9891\u8f7d\u6ce2\u4e0a，\u624d\u80fd\u901a\u8fc7\u624b\u673a\u5929\u7ebf\u53d1\u5c04\u51fa\u53bb，\u5b9e\u73b0\u8fdc\u8ddd\u79bb\u901a\u8bdd\u3002<\/p>\n

2. \u9891\u8c31\u8d44\u6e90\u7684\u9ad8\u6548\u5229\u7528：\u907f\u514d\u201c\u4ea4\u901a\u62e5\u5835\u201d\u7684\u5173\u952e\u8bbe\u8ba1<\/p>\n

\u9891\u8c31\u662f\u6709\u9650\u7684\u516c\u5171\u8d44\u6e90，\u5982\u540c\u57ce\u5e02\u91cc\u7684\u516c\u8def\u3002\u82e5\u6240\u6709\u4f4e\u9891\u4fe1\u53f7\u90fd\u6324\u5728\u4f4e\u9891\u6bb5\u4f20\u8f93，\u5c31\u4f1a\u51fa\u73b0\u4e25\u91cd\u7684\u201c\u4e32\u53f0\u201d\u5e72\u6270\u2014\u2014\u5c31\u50cf\u591a\u6761\u8f66\u9053\u7684\u8f66\u8f86\u6df7\u884c，\u65e0\u6cd5\u5206\u8fa8\u3002\u8c03\u5236\u6280\u672f\u901a\u8fc7\u201c\u9891\u5206\u590d\u7528\u201d\u673a\u5236，\u4e3a\u4e0d\u540c\u4fe1\u53f7\u5206\u914d\u4e13\u5c5e\u7684\u9ad8\u9891\u201c\u8f66\u9053\u201d（\u8f7d\u6ce2\u9891\u7387），\u5b9e\u73b0\u9891\u8c31\u7684\u6709\u5e8f\u5229\u7528：<\/p>\n

FM\u5e7f\u64ad：\u4e13\u5c5e88 – 108MHz\u9891\u6bb5，\u76f8\u90bb\u7535\u53f0\u95f4\u9694200kHz，\u786e\u4fdd\u4e0d\u540c\u8282\u76ee\u4fe1\u53f7\u4e92\u4e0d\u5e72\u6270，\u6bd4\u5982\u6211\u4eec\u5728\u8f66\u5185\u5207\u6362FM93.8\u548cFM101.1\u4e24\u4e2a\u7535\u53f0\u65f6，\u80fd\u6e05\u6670\u542c\u5230\u4e0d\u540c\u8282\u76ee，\u6b63\u662f\u5f97\u76ca\u4e8e\u8fd9\u79cd\u9891\u6bb5\u5212\u5206；<\/p>\n

WiFi 2.4GHz\u9891\u6bb5：\u5212\u5206\u4e3a14\u4e2a\u72ec\u7acb\u4fe1\u9053，\u4fe1\u9053\u95f4\u96945MHz，\u5bb6\u5ead\u4e2d\u4f7f\u7528\u7684\u8def\u7531\u5668\u82e5\u9047\u5230\u4fe1\u53f7\u5361\u987f，\u5207\u6362\u4fe1\u9053\u540e\u5f80\u5f80\u80fd\u6062\u590d\u6d41\u7545，\u5c31\u662f\u56e0\u4e3a\u907f\u5f00\u4e86\u90bb\u91cc\u8def\u7531\u5668\u7684\u4fe1\u9053\u51b2\u7a81\u3002<\/p>\n

3. \u6297\u5e72\u6270\u80fd\u529b\u7684\u672c\u8d28\u63d0\u5347：\u9ad8\u9891\u4fe1\u53f7\u7684\u201c\u5929\u7136\u4f18\u52bf\u201d<\/p>\n

\u4f4e\u9891\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u6781\u5dee，\u5982\u540c\u8f7b\u58f0\u7ec6\u8bed\u6613\u88ab\u566a\u97f3\u6df9\u6ca1；\u800c\u9ad8\u9891\u4fe1\u53f7\u7684\u9891\u7387\u7279\u6027\u4f7f\u5176\u66f4\u5bb9\u6613\u901a\u8fc7\u6ee4\u6ce2\u7535\u8def\u5b9e\u73b0\u201c\u9009\u62e9\u6027\u63a5\u6536\u201d\u2014\u2014\u5c31\u50cf\u5728\u5608\u6742\u73af\u5883\u4e2d，\u6211\u4eec\u80fd\u7cbe\u51c6\u6355\u6349\u5230\u7279\u5b9a\u9891\u7387\u7684\u53e3\u54e8\u58f0\u3002\u6bd4\u5982\u5728\u5de5\u5382\u8f66\u95f4，\u7535\u673a\u8fd0\u8f6c\u4ea7\u751f\u7684\u4f4e\u9891\u566a\u97f3\u4f1a\u5e72\u6270\u5f88\u591a\u8bbe\u5907，\u4f46\u8f66\u95f4\u91cc\u7684\u5bf9\u8bb2\u673a\u91c7\u7528\u9ad8\u9891\u4fe1\u53f7\u4f20\u8f93，\u5c31\u80fd\u7a7f\u900f\u566a\u97f3\u5b9e\u73b0\u6e05\u6670\u901a\u8bdd；\u6b64\u5916，\u9ad8\u9891\u4fe1\u53f7\u7684\u8f90\u5c04\u6548\u7387\u66f4\u9ad8，\u80fd\u5728\u76f8\u540c\u53d1\u5c04\u529f\u7387\u4e0b\u5b9e\u73b0\u66f4\u8fdc\u7684\u4f20\u8f93\u8ddd\u79bb，\u8fd9\u4e5f\u662f\u536b\u661f\u901a\u4fe1\u3001\u8fdc\u8ddd\u79bb\u5e7f\u64ad\u5747\u91c7\u7528\u9ad8\u9891\u8f7d\u6ce2\u7684\u6838\u5fc3\u539f\u56e0\u3002<\/p>\n

\"\"<\/p>\n

\u4fe1\u53f7\u7684\u8c03\u5236\u89e3\u8c03<\/p>\n

\u4e8c\u3001\u7cbe\u51c6\u89e3\u6790：\u6a21\u62df\u8c03\u5236\u7684\u6838\u5fc3\u539f\u7406\u4e0e\u8fc7\u7a0b<\/p>\n

\u6a21\u62df\u8c03\u5236\u662f\u8c03\u5236\u6280\u672f\u7684\u201c\u5f00\u5c71\u9f3b\u7956\u201d，\u6838\u5fc3\u903b\u8f91\u662f\u201c\u5c06\u4f4e\u9891\u6a21\u62df\u4fe1\u53f7\u7684\u53d8\u5316，\u7cbe\u51c6\u6620\u5c04\u5230\u9ad8\u9891\u8f7d\u6ce2\u7684\u67d0\u4e00\u53c2\u6570（\u5e45\u5ea6\u3001\u9891\u7387\u3001\u76f8\u4f4d）\u4e0a\u201d\u3002\u5b83\u5c31\u50cf\u7528\u4e0d\u540c\u7684\u7b14\u6cd5\u5728\u5ba3\u7eb8\u4e0a\u4f5c\u753b，\u867d\u6280\u6cd5\u4e0d\u540c，\u4f46\u90fd\u80fd\u7cbe\u51c6\u4f20\u9012\u4fe1\u606f\u7684\u53d8\u5316\u7ec6\u8282\u3002\u4ee5\u4e0b\u662f\u4e09\u79cd\u7ecf\u5178\u6a21\u62df\u8c03\u5236\u7684\u7cbe\u51c6\u8fc7\u7a0b\u89e3\u6790，\u642d\u914d\u65e5\u5e38\u573a\u666f\u6848\u4f8b\u5e2e\u52a9\u7406\u89e3：<\/p>\n

\u5e45\u5ea6\u8c03\u5236（AM）：\u5e45\u5ea6\u968f\u4fe1\u53f7\u540c\u6b65\u8d77\u4f0f\u7684\u201c\u7cbe\u51c6\u6620\u5c04\u201d<\/p>\n

AM\u7684\u6838\u5fc3\u662f\u201c\u8f7d\u6ce2\u5e45\u5ea6\u4e0e\u8c03\u5236\u4fe1\u53f7（\u4f4e\u9891\u6709\u7528\u4fe1\u53f7）\u7684\u77ac\u65f6\u503c\u7cbe\u51c6\u540c\u6b65\u53d8\u5316\u201d，\u5176\u6570\u5b66\u6a21\u578b\u4e3a：s(t) = Ac[1 + m\u00b7m(t)]\u00b7cos(2\u03c0fc t)，\u5176\u4e2d\u5404\u53c2\u6570\u7684\u7269\u7406\u610f\u4e49\u4e0e\u8c03\u5236\u8fc7\u7a0b\u7684\u7cbe\u51c6\u7ec6\u8282\u5982\u4e0b：<\/p>\n

\u53c2\u6570\u5b9a\u4e49：Ac\u4e3a\u8f7d\u6ce2\u521d\u59cb\u5e45\u5ea6，fc\u4e3a\u8f7d\u6ce2\u9891\u7387，m(t)\u4e3a\u8c03\u5236\u4fe1\u53f7（\u5982\u97f3\u9891），m\u4e3a\u8c03\u5236\u6307\u6570（\u53d6\u503c0-1，\u51b3\u5b9a\u5e45\u5ea6\u53d8\u5316\u7684\u6df1\u5ea6）；<\/p>\n

\u8c03\u5236\u8fc7\u7a0b：\u5f53m(t)\u4e3a\u6b63\u5411\u5cf0\u503c\u65f6，\u8f7d\u6ce2\u5e45\u5ea6\u8fbe\u5230\u6700\u5927\u503cAc(1+m)；\u5f53m(t)\u4e3a\u8d1f\u5411\u5cf0\u503c\u65f6，\u8f7d\u6ce2\u5e45\u5ea6\u964d\u81f3\u6700\u5c0f\u503cAc(1-m)；\u5f53m(t)=0\u65f6，\u8f7d\u6ce2\u4fdd\u6301\u521d\u59cb\u5e45\u5ea6Ac，\u5f62\u6210\u201c\u5305\u7edc\u7ebf\u201d\u4e0e\u8c03\u5236\u4fe1\u53f7\u5b8c\u5168\u4e00\u81f4\u7684AM\u6ce2\u5f62；<\/p>\n

\u5173\u952e\u6ce8\u610f\u70b9：\u8c03\u5236\u6307\u6570m\u5fc5\u987b\u63a7\u5236\u57280-1\u4e4b\u95f4，\u82e5m>1，\u4f1a\u5bfc\u81f4\u201c\u8fc7\u8c03\u5236\u5931\u771f\u201d\u2014\u2014\u6b64\u65f6\u8f7d\u6ce2\u5e45\u5ea6\u4f1a\u51fa\u73b0\u96f6\u70b9\u88c1\u526a，\u8fd8\u539f\u4fe1\u53f7\u65f6\u4ea7\u751f\u4e25\u91cd\u5931\u771f，\u8fd9\u662fAM\u8c03\u5236\u7535\u8def\u8bbe\u8ba1\u7684\u6838\u5fc3\u7981\u5fcc；<\/p>\n

\u5e26\u5bbd\u7279\u6027：AM\u4fe1\u53f7\u7684\u5e26\u5bbdB = 2fm（fm\u4e3a\u8c03\u5236\u4fe1\u53f7\u7684\u6700\u9ad8\u9891\u7387），\u4f8b\u5982\u4f20\u901220kHz\u97f3\u9891\u4fe1\u53f7\u65f6，\u9700\u5360\u752840kHz\u7684\u9891\u8c31\u5bbd\u5ea6，\u9891\u8c31\u6548\u7387\u8f83\u4f4e\u3002<\/p>\n

AM\u7684\u4f18\u52bf\u662f\u7535\u8def\u5b9e\u73b0\u7b80\u5355（\u4ec5\u9700\u4e8c\u6781\u7ba1\u3001\u7535\u5bb9\u3001\u7535\u963b\u5373\u53ef\u642d\u5efa\u57fa\u7840\u8c03\u5236\u7535\u8def），\u6210\u672c\u4f4e\u5ec9；\u7f3a\u70b9\u662f\u6297\u5e72\u6270\u80fd\u529b\u5dee\u2014\u2014\u5916\u754c\u7684\u5e45\u5ea6\u578b\u5e72\u6270（\u5982\u96f7\u7535\u3001\u7535\u673a\u8f90\u5c04）\u4f1a\u76f4\u63a5\u53e0\u52a0\u5728\u8f7d\u6ce2\u5e45\u5ea6\u4e0a，\u5bfc\u81f4\u8fd8\u539f\u4fe1\u53f7\u5931\u771f\u3002\u5982\u4eca，AM\u4ecd\u7528\u4e8e\u4e2d\u6ce2\u5e7f\u64ad（530 – 1700kHz），\u6bd4\u5982\u6211\u4eec\u5728\u519c\u6751\u5730\u533a\u4f7f\u7528\u7684\u7b80\u6613\u6536\u97f3\u673a，\u63a5\u6536\u7684\u5c31\u662fAM\u4fe1\u53f7，\u9047\u5230\u96f7\u96e8\u5929\u6c14\u65f6\u4fe1\u53f7\u4f1a\u53d8\u5f97\u6742\u4e71，\u5c31\u662f\u56e0\u4e3a\u96f7\u7535\u4ea7\u751f\u7684\u5e45\u5ea6\u5e72\u6270\u5f71\u54cd\u4e86AM\u89e3\u8c03\u3002<\/p>\n

\"\"<\/p>\n

\u5e45\u5ea6\u8c03\u5236（AM）<\/p>\n

\u9891\u7387\u8c03\u5236（FM）：\u9891\u7387\u968f\u4fe1\u53f7\u7cbe\u51c6\u504f\u79fb\u7684\u201c\u52a8\u6001\u8c03\u6574\u201d<\/p>\n

FM\u7684\u6838\u5fc3\u662f\u201c\u8f7d\u6ce2\u9891\u7387\u968f\u8c03\u5236\u4fe1\u53f7\u7684\u77ac\u65f6\u503c\u7cbe\u51c6\u504f\u79fb\u201d，\u800c\u975e\u5e45\u5ea6\u53d8\u5316，\u5176\u6570\u5b66\u6a21\u578b\u4e3a：s(t) = Ac\u00b7cos[2\u03c0fc t + 2\u03c0kf \u222bm(\u03c4)d\u03c4]，\u8c03\u5236\u8fc7\u7a0b\u7684\u7cbe\u51c6\u7ec6\u8282\u7684\u5982\u4e0b：<\/p>\n

\u6838\u5fc3\u53c2\u6570：kf\u4e3a\u9891\u7387\u7075\u654f\u5ea6（\u5355\u4f4dHz\/V，\u4ee3\u8868\u5355\u4f4d\u7535\u538b\u7684\u8c03\u5236\u4fe1\u53f7\u80fd\u5f15\u53d1\u7684\u8f7d\u6ce2\u9891\u7387\u504f\u79fb\u91cf），\u222bm(\u03c4)d\u03c4\u662f\u8c03\u5236\u4fe1\u53f7\u7684\u79ef\u5206，\u53cd\u6620\u9891\u7387\u504f\u79fb\u7684\u7d2f\u79ef\u6548\u5e94；<\/p>\n

\u8c03\u5236\u8fc7\u7a0b：\u5f53m(t)\u4e3a\u6b63\u5411\u5cf0\u503c\u65f6，\u8f7d\u6ce2\u9891\u7387\u8fbe\u5230\u6700\u5927\u503cfc + \u0394f（\u0394f = kf\u00b7|m(t)|max，\u79f0\u4e3a\u6700\u5927\u9891\u7387\u504f\u79fb）；\u5f53m(t)\u4e3a\u8d1f\u5411\u5cf0\u503c\u65f6，\u8f7d\u6ce2\u9891\u7387\u964d\u81f3\u6700\u5c0f\u503cfc – \u0394f；\u5f53m(t)=0\u65f6，\u8f7d\u6ce2\u9891\u7387\u4fdd\u6301fc\u4e0d\u53d8，\u9891\u7387\u504f\u79fb\u91cf\u4e0e\u8c03\u5236\u4fe1\u53f7\u7684\u77ac\u65f6\u503c\u6210\u6b63\u6bd4；<\/p>\n

\u6297\u5e72\u6270\u4f18\u52bf：\u7531\u4e8eFM\u4fe1\u53f7\u7684\u4fe1\u606f\u627f\u8f7d\u5728\u9891\u7387\u4e0a，\u800c\u975e\u5e45\u5ea6\u4e0a，\u5916\u754c\u7684\u5e45\u5ea6\u578b\u5e72\u6270\u53ef\u901a\u8fc7\u9650\u5e45\u7535\u8def\u76f4\u63a5\u8fc7\u6ee4（\u9650\u5e45\u7535\u8def\u80fd\u5c06\u4fe1\u53f7\u5e45\u5ea6\u94b3\u4f4d\u5728\u56fa\u5b9a\u503c，\u4e0d\u5f71\u54cd\u9891\u7387\u53d8\u5316），\u56e0\u6b64FM\u7684\u6297\u5e72\u6270\u80fd\u529b\u8fdc\u8d85AM，\u97f3\u8d28\u66f4\u6e05\u6670（\u53ef\u4f20\u901230Hz – 15kHz\u5168\u9891\u6bb5\u97f3\u9891）\u3002<\/p>\n

FM\u5e7f\u6cdb\u5e94\u7528\u4e8e\u8c03\u9891\u5e7f\u64ad（88 – 108MHz）\u3001\u6a21\u62df\u7535\u89c6\u4f34\u97f3\u7b49\u573a\u666f\u3002\u751f\u6d3b\u4e2d\u6700\u5e38\u89c1\u7684\u5c31\u662f\u8f66\u8f7dFM\u6536\u97f3\u673a，\u5373\u4f7f\u8f66\u8f86\u5728\u98a0\u7c38\u7684\u8def\u9762\u884c\u9a76，\u5468\u56f4\u6709\u53d1\u52a8\u673a\u566a\u97f3\u3001\u5176\u4ed6\u8f66\u8f86\u7684\u7535\u78c1\u5e72\u6270，\u4ecd\u80fd\u6e05\u6670\u542c\u5230\u5e7f\u64ad\u8282\u76ee，\u8fd9\u5c31\u662fFM\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u7684\u76f4\u89c2\u4f53\u73b0；\u65e9\u671f\u7684\u6a21\u62df\u7535\u89c6\u4f34\u97f3\u4e5f\u91c7\u7528FM\u8c03\u5236，\u786e\u4fdd\u89c2\u4f17\u5728\u89c2\u770b\u753b\u9762\u7684\u540c\u65f6，\u80fd\u542c\u5230\u6e05\u6670\u7684\u58f0\u97f3\u3002<\/p>\n

\"\"<\/p>\n

\u9891\u7387\u8c03\u5236（FM）<\/p>\n

\u76f8\u4f4d\u8c03\u5236（PM）：\u76f8\u4f4d\u968f\u4fe1\u53f7\u7cbe\u51c6\u504f\u8f6c\u7684\u201c\u9690\u6027\u7f16\u7801\u201d<\/p>\n

PM\u4e0eFM\u540c\u5c5e\u201c\u89d2\u5ea6\u8c03\u5236\u201d，\u6838\u5fc3\u662f\u201c\u8f7d\u6ce2\u76f8\u4f4d\u968f\u8c03\u5236\u4fe1\u53f7\u7684\u77ac\u65f6\u503c\u7cbe\u51c6\u504f\u8f6c\u201d，\u6570\u5b66\u6a21\u578b\u4e3a：s(t) = Ac\u00b7cos[2\u03c0fc t + kp\u00b7m(t)]（k_p\u4e3a\u76f8\u4f4d\u7075\u654f\u5ea6，\u5355\u4f4drad\/V）\u3002\u5176\u8c03\u5236\u8fc7\u7a0b\u7684\u5173\u952e\u662f：\u76f8\u4f4d\u504f\u8f6c\u91cf\u0394\u03c6 = kp\u00b7m(t)，\u4e0e\u8c03\u5236\u4fe1\u53f7\u7684\u77ac\u65f6\u503c\u76f4\u63a5\u76f8\u5173，\u800c\u975e\u79ef\u5206\u5173\u7cfb\u2014\u2014\u8fd9\u662fPM\u4e0eFM\u7684\u6838\u5fc3\u533a\u522b\u3002<\/p>\n

PM\u5728\u6a21\u62df\u901a\u4fe1\u4e2d\u5e94\u7528\u8f83\u5c11（\u76f8\u4f4d\u53d8\u5316\u4e0d\u6613\u88ab\u76f4\u63a5\u611f\u77e5），\u4f46\u5728\u6570\u5b57\u901a\u4fe1\u4e2d\u6210\u4e3a\u6838\u5fc3\u57fa\u7840\u3002\u4e0d\u8fc7\u65e9\u671f\u7684\u6a21\u62df\u5bf9\u8bb2\u673a\u4e2d，\u90e8\u5206\u673a\u578b\u91c7\u7528PM\u8c03\u5236\u5b9e\u73b0\u77ed\u8ddd\u79bb\u901a\u4fe1，\u6bd4\u5982\u5de5\u5730\u3001\u5546\u573a\u4f7f\u7528\u7684\u8001\u5f0f\u5bf9\u8bb2\u673a，\u5176\u4fe1\u53f7\u4f20\u8f93\u7a33\u5b9a\u3001\u4e0d\u6613\u53d7\u5e45\u5ea6\u5e72\u6270，\u6b63\u662f\u501f\u52a9\u4e86PM\u8c03\u5236\u7684\u7279\u6027；\u800c\u6570\u5b57\u901a\u4fe1\u4e2d，PSK（\u76f8\u79fb\u952e\u63a7）\u6280\u672f\u5c31\u662fPM\u8c03\u5236\u7684\u6570\u5b57\u5316\u5ef6\u4f38，\u7528\u4e0d\u540c\u7684\u76f8\u4f4d\u504f\u8f6c\u91cf\u4ee3\u88680\u548c1，\u4e3a\u6570\u5b57\u8c03\u5236\u6280\u672f\u7684\u53d1\u5c55\u5960\u5b9a\u4e86\u539f\u7406\u57fa\u7840\u3002<\/p>\n

\u6a21\u62df\u8c03\u5236\u2014\u2014\u4fe1\u606f\u4f20\u64ad\u7684\u6280\u672f\u5960\u57fa\u4e0e\u65f6\u4ee3\u4ef7\u503c<\/p>\n

\u6a21\u62df\u8c03\u5236\u6280\u672f\u867d\u5df2\u4e0d\u662f\u5f53\u524d\u901a\u4fe1\u7684\u4e3b\u6d41，\u5374\u5b8c\u6210\u4e86\u201c\u8ba9\u4fe1\u53f7\u8de8\u8d8a\u7269\u7406\u9650\u5236\u201d\u7684\u5f00\u521b\u6027\u4f7f\u547d\u3002\u4ece\u65e9\u671f\u7684\u4e2d\u6ce2\u5e7f\u64ad\u5230\u8c03\u9891\u7535\u53f0，\u4ece\u6a21\u62df\u7535\u89c6\u5230\u7b2c\u4e00\u4ee3\u79fb\u52a8\u901a\u4fe1（1G），\u6a21\u62df\u8c03\u5236\u7528\u7b80\u5355\u53ef\u9760\u7684\u539f\u7406，\u9996\u6b21\u5b9e\u73b0\u4e86\u4fe1\u606f\u7684\u8fdc\u8ddd\u79bb\u65e0\u7ebf\u4f20\u64ad，\u6253\u7834\u4e86\u5730\u57df\u5bf9\u4fe1\u606f\u4ea4\u4e92\u7684\u675f\u7f1a，\u4e3a\u4eba\u7c7b\u793e\u4f1a\u8fdb\u5165\u4fe1\u606f\u65f6\u4ee3\u5960\u5b9a\u4e86\u6280\u672f\u57fa\u7840\u3002\u5728\u6570\u5b57\u6280\u672f\u98de\u901f\u53d1\u5c55\u7684\u4eca\u5929，\u6a21\u62df\u8c03\u5236\u7684\u6838\u5fc3\u903b\u8f91\u2014\u2014\u201c\u53c2\u6570\u6620\u5c04\u201d\u201c\u9891\u5206\u590d\u7528\u201d\u4ecd\u5728\u6cbf\u7528，\u5b83\u4e0d\u4ec5\u662f\u901a\u4fe1\u6280\u672f\u7684\u201c\u6e90\u5934\u6d3b\u6c34\u201d，\u66f4\u4e3a\u4fe1\u53f7\u5904\u7406\u9886\u57df\u79ef\u7d2f\u4e86\u6838\u5fc3\u7684\u53c2\u6570\u6620\u5c04\u4e0e\u9891\u5206\u590d\u7528\u6280\u672f\u7ecf\u9a8c，\u8fd9\u4e9b\u5b9d\u8d35\u7684\u6280\u672f\u79ef\u7d2f，\u4e5f\u4e3a\u540e\u7eed\u6570\u5b57\u8c03\u5236\u6280\u672f\u7684\u9769\u65b0\u5960\u5b9a\u4e86\u5173\u952e\u57fa\u7840\u3002<\/p>\n

\n

\n

\n

by\u5317\u7acb\u4f20\u611f<\/p>\n

https:\/\/www.beleadsensor.com<\/span>https:\/\/www.beleadsensor.com<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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