| 摘要 |
<p>A hand-held under water distance measurement device (10) has a first end (12) having a waterproof housing (52a) which houses a digital display (22) and a suitable electronics package (20), a second end (14) housing a transceiver (80), a middle section (16) having a pair of rectangular telescoping rigid tubes (70a,70b) with a spring lock clip (78) for fixing the relative locations of the tubes at two or more locations via the provision of holes (74a, 74b) in each of the tubes, and a flexible conductor (25) for coupling the transceiver (80) and the electronics package (20). The upper (70a) of the pair of telescoping rigid tubes is mechanically coupled to the waterproof housing (52a), while the lower (70b) of the pair is coupled to the transceiver (80), which in one embodiment is rotatable (81c) relative to the lower tube to permit horizontal scanning. In using the device, the transceiver (80) is immersed at least six inches below the water surface while grasping the device by a hand grip located just below the electronics package housing. If length adjustment is required, the spring lock clip (78) securing the telescoping tubes is released by momentarily depressing the pins (79), of the clip. The lower tube (70b) is then slid into or out of the upper tube (70a) until the clip pins (79), engage other holes (74) in the upper tube (70a), at which time the lower telescoping tube (70b) will lock itself relative to the upper tube (70a). If additional adjustement is required, the procedure is repeated until the desired length is obtained. Then, distance measurements may be obtained.</p> |
