초록 ▼

Device for determining the relative position of at least one seismic streamer comprising acoustic pulse sensors, with respect to a seismic streamer comprising acoustic pulse transmitters, all of said streamers being towed behind a ship, comprising a telemetrical system for measuring the distance bet

Device for determining the relative position of at least one seismic streamer comprising acoustic pulse sensors, with respect to a seismic streamer comprising acoustic pulse transmitters, all of said streamers being towed behind a ship, comprising a telemetrical system for measuring the distance between pulse sensors and pulse transmitters by the determination of the travel time of pulses between different pulse transmitters and corresponding pulse sensors and a viewing system for displaying the so-measured distance.

대표청구항 ▼

A device for determining the relative position of at least a first elongate member with respect to a second elongate member, both members being towed behind a ship, comprising a plurality of devices for transmitting acoustic pulses, distributed along said second member, a plurality of devices for re

A device for determining the relative position of at least a first elongate member with respect to a second elongate member, both members being towed behind a ship, comprising a plurality of devices for transmitting acoustic pulses, distributed along said second member, a plurality of devices for receiving transmitted acoustic pulses, distributed along said first member and a telemetrical system for measuring the relative distance between the elongate members by determination of the travel times of acoustic pulses between said transmitting devices of said second elongate member and said receiving devices of said first elongate member, and wherein each transmitting device includes means for selectively transmitting signals at a respective determined frequency and each receiving device includes means to selectively sense acoustic signals issued from a single transmitting device.