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class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"245\" src=\"http:\/\/www.sdscsafe.com\/wp-content\/uploads\/2025\/11\/\u56fe\u72471-1024x245.png\" alt=\"\" class=\"wp-image-3257\" srcset=\"http:\/\/www.sdscsafe.com\/wp-content\/uploads\/2025\/11\/\u56fe\u72471-1024x245.png 1024w, http:\/\/www.sdscsafe.com\/wp-content\/uploads\/2025\/11\/\u56fe\u72471-300x72.png 300w, http:\/\/www.sdscsafe.com\/wp-content\/uploads\/2025\/11\/\u56fe\u72471-768x183.png 768w, http:\/\/www.sdscsafe.com\/wp-content\/uploads\/2025\/11\/\u56fe\u72471.png 1122w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e94\u3001<strong>\u91c7\u6837\u7387\u5bf9\u91c7\u96c6\u4fe1\u53f7\u7684\u5f71\u54cd<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>\u91c7\u6837\u7387\u5bf9\u4fe1\u53f7\u7684\u8fd8\u539f\u7a0b\u5ea6\u6709\u7740\u76f4\u63a5\u5f71\u54cd\u3002\u4e00\u822c\u800c\u8a00\uff0c\u91c7\u6837\u7387\u8d8a\u9ad8\uff0c\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u91c7\u96c6\u5230\u7684\u6570\u636e\u70b9\u5c31\u8d8a\u591a\uff0c\u5bf9\u4fe1\u53f7\u65f6\u95f4\u53d8\u5316\u7684\u6355\u6349\u5c31\u8d8a\u7cbe\u7ec6\uff0c\u80fd\u591f\u66f4\u51c6\u786e\u5730\u8fd8\u539f\u539f\u59cb\u4fe1\u53f7\u7684\u6ce2\u5f62\uff0c\u6240\u91c7\u6570\u636e\u7684\u5931\u771f\u4e5f\u5c31\u8d8a\u5c0f\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u516c\u5f0f\u548c\u5b9e\u4f8b\u6765\u66f4\u76f4\u89c2\u5730\u7406\u89e3\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u9891\u7387\u4e3af\u7684\u6b63\u5f26\u4fe1\u53f7\uff0c\u91c7\u6837\u7387\u4e3as\uff0c\u91cd\u6784\u6ce2\u5f62\u5cf0\u503c\u504f\u79bb\u5b9e\u9645\u4fe1\u53f7\u5cf0\u503c\u7684\u504f\u79bb\u65f6\u95f4\u4e3at\uff0c\u88ab\u6d4b\u4fe1\u53f7\u7684\u5468\u671f\u4e3aT(T=1\/f)\uff0c n=s\/f \u6d4b\u91cf\u5e45\u5ea6\u8bef\u5dee\u4e3adA\uff0c\u5219\u6709\uff1a<\/p>\n\n\n\n<p>dA = 1 &#8211; cos(2\u03c0t\/T)<\/p>\n\n\n\n<p>\u8fdb\u4e00\u6b65\u63a8\u5bfc\u53ef\u5f97\uff1a<\/p>\n\n\n\n<p>dA = 1 &#8211; cos(\u03c0f\/s)<\/p>\n\n\n\n<p>\u4ee5\u4e00\u4e2a 400KHz \u7684\u6b63\u5f26\u4fe1\u53f7\u4e3a\u4f8b\uff0c\u5f53\u91c7\u6837\u7387\u4e3a 1000KHz\uff08\u5373 1000kSample\uff09\u65f6\uff0c\u6839\u636e\u516c\u5f0f\u8ba1\u7b97\u53ef\u5f97\uff1a<\/p>\n\n\n\n<p>dA = 1 &#8211; cos(\u03c0*400\/1000) \u2248 0.309017<\/p>\n\n\n\n<p>\u5bf9\u5e94\u7684\u5e45\u5ea6\u8bef\u5dee\uff1a<\/p>\n\n\n\n<p>A(dB) = 20lgdA \u2248 -10.2004dB<\/p>\n\n\n\n<p>\u5f53\u91c7\u6837\u7387\u63d0\u9ad8\u5230 2000KH\u65f6\uff1a<\/p>\n\n\n\n<p>dA = 1 &#8211; cos(\u03c0*2000\/1000) \u2248 0.809017<\/p>\n\n\n\n<p>\u5bf9\u5e94\u7684\u5e45\u5ea6\u8bef\u5dee\uff1a<\/p>\n\n\n\n<p>A(dB) = 20lgdA \u2248 -1.84085dB<\/p>\n\n\n\n<p>\u53ef\u4ee5\u660e\u663e\u770b\u51fa\uff0c\u968f\u7740\u91c7\u6837\u7387\u7684\u63d0\u9ad8\uff0c\u5e45\u5ea6\u8bef\u5dee\u663e\u8457\u51cf\u5c0f\uff0c\u4fe1\u53f7\u7684\u8fd8\u539f\u5ea6\u66f4\u9ad8\u3002<\/p>\n\n\n\n<p><strong>\u91c7\u6837\u7387\u7684\u63d0\u9ad8\u867d\u7136\u80fd\u63d0\u5347\u4fe1\u53f7\u91c7\u96c6\u7684\u8d28\u91cf\uff0c\u4f46\u4e5f\u4f1a\u5e26\u6765\u6570\u636e\u91cf\u7684\u6025\u5267\u589e\u5927\u3002<\/strong><strong><\/strong><\/p>\n\n\n\n<p>\u56e0\u4e3a\u5355\u4f4d\u65f6\u95f4\u5185\u91c7\u96c6\u7684\u6570\u636e\u70b9\u589e\u591a\uff0c\u9700\u8981\u5b58\u50a8\u548c\u5904\u7406\u7684\u6570\u636e\u91cf\u4e5f\u76f8\u5e94\u589e\u52a0\uff0c\u5bf9\u5b58\u50a8\u8bbe\u5907\u7684\u5bb9\u91cf\u548c\u6570\u636e\u4f20\u8f93\u7684\u5e26\u5bbd\u548c\u5904\u7406\u901f\u5ea6\u90fd\u5e26\u6765\u4e86\u5de8\u5927\u6311\u6218\u3002<\/p>\n\n\n\n<p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5982\u679c\u7cfb\u7edf\u7684\u5b58\u50a8\u548c\u5904\u7406\u80fd\u529b\u6709\u9650\uff0c\u8fc7\u9ad8\u7684\u6570\u636e\u91cf\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u589e\u591a\uff0c\u53cd\u800c\u5f71\u54cd\u4fe1\u53f7\u91c7\u96c6\u7684\u6548\u679c\u3002\u56e0\u6b64\u5728\u9009\u62e9\u91c7\u6837\u7387\u65f6\uff0c\u9700\u8981\u5728\u4fe1\u53f7\u5931\u771f\u7a0b\u5ea6\u548c\u6570\u636e\u91cf\u4e4b\u95f4\u627e\u5230\u4e00\u4e2a\u5e73\u8861\u70b9\uff0c\u4ee5\u786e\u4fdd\u65e2\u80fd\u6ee1\u8db3\u4fe1\u53f7\u91c7\u96c6\u7684\u7cbe\u5ea6\u8981\u6c42\uff0c\u53c8\u80fd\u4fdd\u8bc1\u7cfb\u7edf\u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u516d\u3001<strong>\u91c7\u6837\u7387\u5728\u4e0d\u540c\u573a\u666f\u7684\u5e94\u7528<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>\u5728\u5b9e\u9645\u7684\u58f0\u53d1\u5c04\u4fe1\u53f7\u76d1\u6d4b\u5e94\u7528\u4e2d\uff0c\u4e0d\u540c\u7684\u573a\u666f\u5bf9\u91c7\u6837\u7387\u6709\u7740\u4e0d\u540c\u7684\u8981\u6c42\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u5408\u7406\u9009\u62e9\u3002<\/p>\n\n\n\n<p><strong>\u5ca9\u77f3\u68c0\u6d4b\u9886\u57df<\/strong><strong><\/strong><\/p>\n\n\n\n<p>\u5ca9\u77f3\u5185\u90e8\u88c2\u7eb9\u6269\u5c55\u7b49\u4ea7\u751f\u7684\u58f0\u53d1\u5c04\u4fe1\u53f7\u9891\u7387\u591a\u5728\u51e0\u5341KHz\uff0c\u4fe1\u53f7\u9891\u7387\u76f8\u5bf9\u8f83\u4f4e\uff0c\u6839\u636e\u5948\u594e\u65af\u7279\u91c7\u6837\u5b9a\u7406\uff0c\u5b9e\u9645 5M \u91c7\u6837\u7387\u5373\u8db3\u591f\u6ee1\u8db3\u8981\u6c42\uff0c\u5728\u5b9e\u9645\u68c0\u6d4b\u4e2d\u4e00\u822c\u5c06\u91c7\u6837\u7387\u8bbe\u7f6e\u5728 2M \u4ee5\u4e0b\u3002\u8fd9\u6837\u65e2\u80fd\u4fdd\u8bc1\u51c6\u786e\u6355\u6349\u5230\u5ca9\u77f3\u58f0\u53d1\u5c04\u4fe1\u53f7\u7684\u7279\u5f81\uff0c\u53c8\u4e0d\u4f1a\u56e0\u4e3a\u8fc7\u9ad8\u7684\u91c7\u6837\u7387\u4ea7\u751f\u8fc7\u591a\u5197\u4f59\u6570\u636e\uff0c\u589e\u52a0\u4e0d\u5fc5\u8981\u7684\u6210\u672c\u548c\u5904\u7406\u8d1f\u62c5\u3002<\/p>\n\n\n\n<p><strong>\u91d1\u5c5e\u635f\u4f24\u68c0\u6d4b<\/strong><strong><\/strong><\/p>\n\n\n\n<p>\u91d1\u5c5e\u6750\u6599\u7684\u7279\u6027\u4ee5\u53ca\u635f\u4f24\u4ea7\u751f\u7684\u58f0\u53d1\u5c04\u4fe1\u53f7\u7279\u70b9\u4e0e\u5ca9\u77f3\u6709\u6240\u4e0d\u540c\u3002\u91d1\u5c5e\u5728\u53d7\u5230\u5916\u529b\u4f5c\u7528\u53d1\u751f\u5851\u6027\u53d8\u5f62\u3001\u88c2\u7eb9\u840c\u751f\u548c\u6269\u5c55\u65f6\uff0c\u4ea7\u751f\u7684\u58f0\u53d1\u5c04\u4fe1\u53f7\u9891\u7387\u8303\u56f4\u8f83\u5bbd\uff0c\u53ef\u80fd\u4f1a\u5305\u542b\u4e00\u4e9b\u9ad8\u9891\u6210\u5206 \u3002\u5bf9\u4e8e\u4e00\u4e9b\u9ad8\u9891\u4fe1\u53f7\u5360\u6bd4\u8f83\u5927\u7684\u91d1\u5c5e\u635f\u4f24\u68c0\u6d4b\u573a\u666f\uff0c\u5c31\u9700\u8981\u66f4\u9ad8\u7684\u91c7\u6837\u7387\u6765\u786e\u4fdd\u80fd\u591f\u51c6\u786e\u91c7\u96c6\u5230\u4fe1\u53f7\u7684\u5168\u90e8\u7ec6\u8282\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5f53\u68c0\u6d4b\u67d0\u4e9b\u9ad8\u901f\u51b2\u51fb\u4e0b\u7684\u91d1\u5c5e\u6750\u6599\u635f\u4f24\u65f6\uff0c\u4fe1\u53f7\u4e2d\u53ef\u80fd\u5b58\u5728\u6570MHz \u7684\u9ad8\u9891\u6210\u5206\uff0c\u6b64\u65f6\u5c31\u9700\u8981\u91c7\u7528 10M 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