Mining Publication: Development of a Closed Circuit TV Borehole Probe
This report describes a 4-in diameter borehole probe which contains a low light level television camera, magnetic compass, light illumination source, bottom-water detector sensor, and a point angle sensor. The camera viewing angle is at a right angle to the probe's body. All data from the sensor are multiplexed into the closed-circuit camera video for transmission on a single 50-ohm coaxial cable to a surface control unit. Likewise, control of the probe's power, zoom lens, focus, panning, and aperture is accomplished via a downlink multiplexed on the same cable.
Contract/MOA ReportSeptember - 1984
NIOSHTIC2 Number: 10004671
Design Engineering Laboratories, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. H0308041. NTIS No. PB/85-240414, 1984; :1-22