| 摘要 |
An exploration unit (24) comprises a three-dimensional compass (61) and a video camera (58) mounted on the unit, in use, to capture video images of a face of the compass. Data communication means (56, 20, 68, 74) connected to the camera serve to transmit data relating to the images to a remote computer (78) which processes the data, to display the images in real time on a monitor (82). Data derived from displayed images at various depths in a hole and data relating to corresponding depths are utilized to compute and plot a profile of the hole. |
