防止移動式起重機誤觸架空高壓線之預警裝置研發

Development of an Alarm System for Preventing Mobile Cranes from Accidental Contact with Overhead Power Lines

起重機誤觸架空高壓線事故是造成勞工意外傷害的主要原因之一，而觸電預警裝置即是設計用來防止此類感電事故的發生。針對此預防措施，本研究乃發展了具有數位方式設定預警範圍功能之預警裝置，開發校正和檢測預警功能的方法，評估環境對預警裝置之可能影響，設計預警裝置的電池電量監測電路與省電措施，並進行實驗室及現場測試，以改善和驗証預警裝置功能。由預警裝置的研發及使用，將能夠有效地避免移動式起重機誤觸架空高壓線，減少感電事故的發生，如此既可以使操作者和其他工程人員可以得到更大的安全保障，而且亦可避免輸電系統因感電事故而造成短路或斷路的情況發生。

The accident of mobile cranes contacting overhead power lines is one of the main causes for worker injuries. A power-line contact alarm system is designed for preventing such accidents. This system has a digital function for setting detection coverage and battery power monitoring and saving circuits to increase reliability. Several methods for calibrating and testing the alarm function of the system are also developed. To evaluate this system, measurements in a laboratory and outside fields have been performed, which include detection coverage, digital setting, and interferences. Using the power-line contact alarm system, operators of mobile cranes can effectively prevent the cranes from contacting the power lines, and the operators and other workers may perform their jobs more safely. Besides, the line-to-ground faults of the transmission/distribution systems caused by contacting power lines can be avoided.