Portable integrated detection and alarm system for harmful gases in deep foundation pit

• Main Authors: LIU MIN, XIONG YUXING, ZHENG WURONG, YANG GUANGYU, CHEN CHONG, ZHANG CHUNJIE, WEI HEGUANG, YANG FAN, JIANG HONGQING
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2010
• Subjects: ALARM SYSTEMS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; TESTING

The invention discloses a portable integrated detection and alarm system for harmful gases in a deep foundation pit, which comprises a portable gas detection device, a signal relay device and an office monitoring device, wherein the three devices are provided with an alarm device capable of giving alarms when the concentration of the harmful gasses in a mixed gas in a building deep foundation pit reaches a set threshold value; the portable gas detection device, the signal relay device and the office monitoring device are communicated with one another through wireless signals; and when the system detects that the content of toxic harmful gasses exceeds a standard, a wireless monitoring system gives three levels of alarms at the pit bottom, at the pithead and in offices to prompt workers to evacuate job sites, and simultaneously prompt rescuers to perform rescue works. Besides, the system also supports an active alarm function to allow on-site workers around every position of the deep foundation pit to give an