| 摘要 |
<p>The present invention relates to a varying snow depth monitoring system (1) comprising a mobile monitoring device (3) including a positioning system (5) arranged to determine a position (x 1 ,y) of the monitoring device, and an altitude gauge (6) arranged to detect an altitude (z detected ) of the monitoring device in said position, and a processing circuitry (7) arranged to compare the detected altitude with a previous altitude at said position, in order to enable monitoring varying snow depth change (d), as the mobile monitoring device is maneuvered over a selected snow covered surface (4). The altitude gauge is an air pressure altimeter, the monitoring system further comprises an air pressure reference altimeter (11), and the processing circuitry is adapted to receive calibration data (k) from the reference altimeter and calibrate the detected altitude based on the calibration data. The present invention also relates to a varying snow depth monitoring system (1'), comprising a tilt sensor arranged for measuring an angle ¸ between a normal direction of a mobile monitoring device and a vertical direction. A processing circuitry is adapted to calculate a snow depth change in the normal direction by multiplying a determined snow depth change with cos ¸. By detecting the altitude and subsequently the varying snow depth change by the use of altimeters, a more cost effective solution is suggested.</p> |
