Abstract: A method for displaying an area on a display device, such as a graphical user interface (GUI), by displaying a front view of the area generated from front view data and a top view of the area generated from top view data according to a first line-of-sight; processing an interaction between an operator and one of the front view and the top view of the GUI; and displaying on the same display device an updated front view of the area and an updated top view of the area, wherein the updated front view and the updated top view are generated from the front view data and top view data according to a second line-of-sight, and wherein the first line-of-sight and the second line-of-sight have a common origin. The method is particularly useful for visualising, for example, an open cut mine. An apparatus for working the method is also described.

Abstract: The invention is a method of geo-positioning geographic data for visualization of a geographic area, particularly a mine site, and a device to work the method.

Abstract: The invention is a method of geo-positioning geographic data for visualisation of a geographic area, particularly a mine site, and a device to work the method.

Abstract: A method for displaying an area on a display device, such as a graphical user interface (GUI), by displaying a front view of the area generated from front view data and a top view of the area generated from top view data according to a first line-of-sight; processing an interaction between an operator and one of the front view and the top view of the GUI; and displaying on the same display device an updated front view of the area and an updated top view of the area, wherein the updated front view and the updated top view are generated from the front view data and top view data according to a second line-of-sight, and wherein the first line-of-sight and the second line-of-sight have a common origin. The method is particularly useful for visualising, for example, an open cut mine. An apparatus for working the method is also described.

Abstract: A Work Area Monitor comprising a radar module mounted on a motorized vehicle. The Work Area Monitor provides early warning of slope failure in a work area by generating an alarm if movement detected in movement data derived from interferometrically processed radar images exceeds a threshold.

Abstract: A method of generating an alarm indicating movement of a slope under inspection that sets an alarm if (1), where dX is a first measured displacement, dY is another measured displacement at a chosen difference from dX, and dZ is another measured displacement at a chosen difference from dY, and the corresponding times at which the chosen distances are measured are tA, tB and tC respectively for dX dY and dZ. So that an alarm is set if the ratio of the time taken for the slope to move between dY and dZ compared to moving between dX and dY is less than the ratio of the respective displacements.

Abstract: A Work Area Monitor comprising a radar module mounted on a motorised vehicle. The Work Area Monitor provides early warning of slope failure in a work area by generating an alarm if movement detected in movement data derived from interferometrically processed radar images exceeds a threshold.

Abstract: A Work Area Monitor comprising a radar module mounted on a motorised vehicle. The Work Area Monitor provides early warning of slope failure in a work area by generating an alarm if movement detected in movement data derived from interferometrically processed radar images exceeds a threshold.

Abstract: A method of generating an alarm indicating movement of a slope under inspection that sets an alarm if (1), where dX is a first measured displacement, dY is another measured displacement at a chosen difference from dX, and dZ is another measured displacement at a chosen difference from dY, and the corresponding times at which the chosen distances are measured are tA, tB and tC respectively for dX dY and dZ. So that an alarm is set if the ratio of the time taken for the slope to move between dY and dZ compared to moving between dX and dY is less than the ratio of the respective displacements.

Abstract: A Work Area Monitor comprising a radar module mounted on a motorised vehicle. The Work Area Monitor provides early warning of slope failure in a work area by generating an alarm if movement detected in movement data derived from interferometrically processed radar images exceeds a threshold.

Abstract: A method and system for determining alarm conditions of a slope under inspection whereby one or more dimensionless threat estimate values are calculated for one or more time periods. The maximum dimensionless threat estimate value calculated is selected and compared with a threshold alarm value. If the maximum dimensionless threat estimate value exceeds the threshold alarm value alarm conditions are set to indicate that the slope under inspection is exhibiting unsafe movement.

Abstract: A method and system for determining alarm conditions of a slope under inspection whereby one or more dimensionless threat estimate values are calculated for one or more time periods. The maximum dimensionless threat estimate value calculated is selected and compared with a threshold alarm value. If the maximum dimensionless threat estimate value exceeds the threshold alarm value alarm conditions are set to indicate that the slope under inspection is exhibiting unsafe movement.

Abstract: A slope monitoring system having a radar and a video camera recording images sequences of the slope. A data processing unit performs coordinate registration to align the radar images and the video images. Interferometry is used to detect movement in the slope by generating interference maps between the images. These are suitably phase maps showing the phase change between a radar image and a reference image. An alarm occurs if a significant movement is detected.

Abstract: A slope monitoring system having a radar and a video camera recording images sequences of the slope. A data processing unit performs coordinate registration to align the radar images and the video images. Interferometry is used to detect movement in the slope by generating interference maps between the images. These are suitably phase maps showing the phase change between a radar image and a reference image. An alarm occurs if a significant movement is detected.

Abstract: A ground penetrating radar includes a signal generator, a return signal processor, a gate and an antenna. The signal generator is a dual frequency synthesizer that generates a stepped frequency master signal and a tracking signal offset by an intermediate frequency. The return signal processor is a dual channel quadrature receiver that mixes down a return signal and a sample of the master signal to intermediate frequency using the tracking signal. The signal generator is pulsed by the gate and the return signal is gated at the same frequency. Hollow pyramidal antennas are also described that have an ultrawide band bowtie structure with antenna electronics located within one antenna element. A method of operating the radar is also described.

Abstract: A ground penetrating radar comprises a signal generator, a return signal processor, gating means and antenna. The signal generator is a dual frequency synthesiser that generates a stepped frequency master signal and a tracking signal offset by an intermediate frequency. The return signal processor is a dual channel quadrature receiver that mixes down a return signal and a sample of the master signal to intermediate frequency using the tracking signal. The signal generator is pulsed by the gating means and the return signal is gated at the same frequency. Hollow pyramidal antennas are also described that have an ultrawide band bowtie structure with antenna electronics located within one antenna element. A method of operating the radar is also described.

Abstract: A roller door apparatus is provided that includes a roller means and a means journalling the roller means for reversible rotation about a central longitudinal roller axis. The roller door also includes end rail means for a reciprocal linear movement between a first position adjacent the roller means and a second position away from the roller means. Also included is a flexible curtain means with one end attached to the end rail means and the other end attached to the roller means, such that the curtain means closes a door opening with the end rail means in the second position. The curtain means winds onto the roller means when the end rail moves from the second position to the first position and vice versa.