An audio and video network monitoring system for weather modification operation transmitting information by 3G, ADSL and Internet has been developed and applied in weather modification operation of Tai＇an City. The a...An audio and video network monitoring system for weather modification operation transmitting information by 3G, ADSL and Internet has been developed and applied in weather modification operation of Tai＇an City. The all-in-one machine of 3G audio and video network highly integrates all front-end devices used for audio and video collection, communication, power supply and information storage, and has advantages of wireless video transmission, clear two-way voice intercom with the command center, waterproof and dustproof function, simple operation, good portability, and long working hours. Compression code of the system is transmitted by dynamic bandwidth, and compression rate varies from 32 kbps to 4 Mbps under different network conditions. This system has forwarding mode, that is, monitoring information from each front-end monitoring point is trans- mitted to the server of the command center by 3G/ADSL, and the server codes＇and decodes again, then beck-end users call images from the serv- er, which can address 3G network stoppage caused by many users calling front-end video at the same time. In addition, the system has been ap- plied in surface weather modification operation of Tai＇an City, and has made a great contribution to transmitting operation orders in real time, monitoring, standardizing and recording operating process, and improving operating safety.展开更多
随着中波转播台技术的发展,音频信号的高质量传输和监测变得至关重要。光电转换技术为信号传输带来高保真和低干扰的优势,但在传输过程中也可能遇到挑战,如介质不均匀性导致的细小干扰。音频比对监测技术能有效监控和保证广播内容的准...随着中波转播台技术的发展,音频信号的高质量传输和监测变得至关重要。光电转换技术为信号传输带来高保真和低干扰的优势,但在传输过程中也可能遇到挑战,如介质不均匀性导致的细小干扰。音频比对监测技术能有效监控和保证广播内容的准确性和真实性,利用先进的算法如梅尔频率倒谱系数(Mel Frequency Cepstral Coefficents,MFCC)来分析信号的质量。文章主要分析了音频比对监测的功能、原理及其在中波转播台的应用,以期通过中波转播平台进行音频监测来减少人为错误,降低故障率。展开更多
随着工业的快速发展,粉尘污染日益严重,促使袋式除尘器在工业粉尘治理中得到广泛应用。然而,滤袋破损、清灰不均匀、风机故障等问题频发,急需先进的状态监测与故障诊断技术来解决存在的问题。因此,探索将数字音频技术应用于袋式除尘器...随着工业的快速发展,粉尘污染日益严重,促使袋式除尘器在工业粉尘治理中得到广泛应用。然而,滤袋破损、清灰不均匀、风机故障等问题频发,急需先进的状态监测与故障诊断技术来解决存在的问题。因此,探索将数字音频技术应用于袋式除尘器的维修,重点研究基于小波包能量、Hilbert谱图、自回归滑动平均(Auto-Regressive and Moving Average,ARMA)模型频谱等特征的滤袋破损检测、清灰系统评估、风机运行状态监测方法。展开更多
基金Supported by the Integration and Application Project of Meteorological Key Technology of China Meteorological Administration(CMAGJ2012M30) Technology Development Projects of Tai'an Science and Technology Bureau in 2010 (201002045) and 2011
文摘An audio and video network monitoring system for weather modification operation transmitting information by 3G, ADSL and Internet has been developed and applied in weather modification operation of Tai＇an City. The all-in-one machine of 3G audio and video network highly integrates all front-end devices used for audio and video collection, communication, power supply and information storage, and has advantages of wireless video transmission, clear two-way voice intercom with the command center, waterproof and dustproof function, simple operation, good portability, and long working hours. Compression code of the system is transmitted by dynamic bandwidth, and compression rate varies from 32 kbps to 4 Mbps under different network conditions. This system has forwarding mode, that is, monitoring information from each front-end monitoring point is trans- mitted to the server of the command center by 3G/ADSL, and the server codes＇and decodes again, then beck-end users call images from the serv- er, which can address 3G network stoppage caused by many users calling front-end video at the same time. In addition, the system has been ap- plied in surface weather modification operation of Tai＇an City, and has made a great contribution to transmitting operation orders in real time, monitoring, standardizing and recording operating process, and improving operating safety.
文摘随着中波转播台技术的发展,音频信号的高质量传输和监测变得至关重要。光电转换技术为信号传输带来高保真和低干扰的优势,但在传输过程中也可能遇到挑战,如介质不均匀性导致的细小干扰。音频比对监测技术能有效监控和保证广播内容的准确性和真实性,利用先进的算法如梅尔频率倒谱系数(Mel Frequency Cepstral Coefficents,MFCC)来分析信号的质量。文章主要分析了音频比对监测的功能、原理及其在中波转播台的应用,以期通过中波转播平台进行音频监测来减少人为错误,降低故障率。
文摘随着工业的快速发展,粉尘污染日益严重,促使袋式除尘器在工业粉尘治理中得到广泛应用。然而,滤袋破损、清灰不均匀、风机故障等问题频发,急需先进的状态监测与故障诊断技术来解决存在的问题。因此,探索将数字音频技术应用于袋式除尘器的维修,重点研究基于小波包能量、Hilbert谱图、自回归滑动平均(Auto-Regressive and Moving Average,ARMA)模型频谱等特征的滤袋破损检测、清灰系统评估、风机运行状态监测方法。
