联合TCT和W-SpSF的气体泄漏定位

Gas leak location using TCT and W-SpSF

为提高基于声学检测压力气体漏源定位方法在强噪声干扰下定位运算收敛速度和定位精度,提出一种基于加权子空间拟合(WSF)准则的宽带测向稀疏表示模型(W-SpSF),将模型与双边相关变换算法(TCT)相结合,通过聚焦运算得到聚焦频率处的协方差矩阵,并作为稀疏恢复的数据,最终实现DOA定位,得到漏源的位置。定位过程中,采用加权子空间拟合降低噪声的敏感程度。分别在仿真和实验室模拟环境中对算法进行测试,经仿真结果表明,在加入强噪声干扰条件下,相比于同类算法的运算速度提升最低50%,定位误差减少20%,在实测环境下,本文搭建了8元声传感器阵列的声源定位系统,针对气瓶模拟泄漏能够实现定位,且漏源定位速度快,证明了算法在实际环境中的可行性。

In order to improve the convergence speed and positioning accuracy of the pressure gas leakage source localization method based on acoustic detection under strong noise interference,this paper proposes a wideband direction finding sparse representation model(W-SpSF)based on weighted subspace fitting(WSF)criterion.The model is combined with the bilateral correlation transform algorithm(TCT),and the covariance matrix at the focusing frequency is obtained by focusing operation.As the sparse recovery data,the DOA positioning is finally realized and the location of the leakage source is obtained.In positioning process,weighted subspace fitting is used to reduce the sensitivity of noise.In this paper,the algorithm is tested in the simulation and laboratory simulation environment respectively.The simulation results show that under the condition of adding strong noise interference,the operation speed of the algorithm is increased by 50%and the positioning error is reduced by 20%compared with the similar algorithm.In the measured environment,this paper builds a sound source positioning system of 8-element acoustic sensor array,which can realize positioning for the simulated leakage of gas cylinders,and the leakage source positioning speed is fast,which proves the feasibility of the algorithm in the actual environment.