Development and performance test of active sound source locating lamp for trapped personnel in mine flooding accidents
[Objective]Water penetration accidents in underground mines are common and often lead to severe consequences.Once an accident happens,considerable amounts of water gushes into the underground and is difficult to discharge quickly.In addition,the complexity of the shaft system leads to unclear rescue routes and difficulty in accurately locating trapped personnel.Currently,the positioning of underground personnel in coal mines involves radio frequency identification technology;however,the wireless signal attenuation in the water becomes apparent,with an extremely short propagation distance.This study proposes to apply active acoustic source localization technology in emergency rescue of mine water penetration accidents,aiming to solve the problem of signal failure of the existing radio system after the accident,making it difficult to accurately locate the trapped personnel.[Methods]By optimizing the design of the main and internal structures of the positioning lamp,the self-developed acoustic generator is built into the lamp.Through the innovative design of circuit connection,the acoustic wave generator and the mining lamp are integrated,power supply is shared,and resource allocation is optimized to realize the organic integration of the acoustic wave generator and the traditional mining lamp.The mass of the beacon is only 30 g,which does not increase the burden of miners.Under normal circumstances,the acoustic beacon circuit in the miner's lamp is disconnected and does not consume electricity.During water penetration,the acoustic beacon uses water as a medium to conduct the circuit and emit an acoustic signal.Search and rescue personnel or robots can accomplish localization by capturing the acoustic signals emitted by the underwater localization acoustic beacon.[Results]The active sound source locating lamp performed excellently in the test experiments.First,the lamp self-activates in the event of water penetration,ensuring that it can be used quickly during the incident.Second,the acoustic generator of the locator lamp has a frequency of 3.15 kHz,and the acoustic signal was received over 72 m,allowing for the accurate positioning of trapped people.[Conclusions]The design and development of an active sound source locating lamp is highly innovative,and the active acoustic source-based localization technology has been applied for the first time to the emergency rescue of mine water penetration.By combining the self-developed acoustic generator with the traditional mining lamp,the design and development of the mining lamp can realize the accurate positioning of the trapped people underground in mine water penetration accidents.It fixes the issue of nonworking radio signals in mine water penetration accidents,making it difficult to accurately locate the trapped people,which is of great significance to improve emergency rescue following water penetration accidents in mines.
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