Measuring method for non-destructive analysis of a snow coating and measuring device for carrying out of the measuring method

摘要

For the determination of the snow cover design, especially for the detection of weakly layers for avalanches previously to say without the presence of persons, non-destructive measurement method is known, with which the weakly layers as discontinuities of the physical parameters with a ground radar processing upwards from below the snow layers are measured in the direction of. Only electromagnetic (em) signals in a vertical angle of incidence (θ = 90°) to the surface are used, whereby the measurement accuracy is not optimal. In the case of the active measuring method according to the invention, therefore, each measurement point (p_ij) in each layer boundary with (lb_i) in addition to an acoustic (ac) signal measured. Furthermore, each measurement point (p_ij) even under different angles of incidence (θ ≠ 90°) of the transmission signals measured in order the angle dependence of the relevant physical parameters of the snow layers to detect device (21). For this purpose, the transmitter and the receiver, which either individually (25, 26, 27, 28) or in combination (23, 24, 31, 32) can be arranged, at least a first distance (x_m) with respect to one another on. The coupling of the electromagnetic and acoustic data with the device for the snow layers (21) relevant physical parameters, in particular density, is effected by means of a mathematical the form of an inversion.