Cable length monitoring device

Abstract

The invention discloses a cable length monitoring device which comprises a guide wheel, a proximity sensor, a cable pressing wheel, more than two sections of steel wire gauge enclosures and a signal acquisition module, wherein the cable pressing wheel is in contact with a towing rope in a monitoring process, the towing rope is in a monitoring range of the proximity sensor; and the proximity sensor measures the quantity of the passes steel wire gauge enclosures through the proximity sensor, and the signal acquisition module is used for receiving and processing data monitored from the proximity sensor so that the length of the cable is figured out. By using the cable length monitoring device disclosed by the invention, the monitoring step of the cable length can be simplified, and the measurement precision of the cable length is improved.

Description

technical field [0001] The invention relates to the tow cable retracting and unwinding technology of an underwater towing system, in particular to a cable length monitoring device for monitoring the cable length. Background technique [0002] In the underwater towing system, the position of the towed body is greatly affected by the length of the cable. Monitoring the length of the cable can estimate the position of the towed body. Monitoring the limit position of the towed cable can prevent the Therefore, the reliable monitoring of the cable length is of great significance to the safe operation of the underwater towing system. [0003] At present, the monitoring of the length of the tow cable in the underwater towing system is mainly by recording the number of revolutions of the winch and the outer diameter of the winch, and estimating according to the formula, the formula is where Ls is the length of the streamer, L T is the length of the reel, n is the number of layers ...

AI Technical Summary

Problems solved by technology

Among them, the number of towline layers n is obtained by recording the number of turns of the winch with a photoelectric encoder or other devices. When the winch rotates forward to reverse, the readings of the photoelectric encoder are converted by addition and subtraction, which is easy to miss and cause a large reading error. Large, and every time the photoelectric encoder needs to be calibrated, the system complexity is high

Moreover, the gap a between the tow cables is not a fixed value, it is difficult to measure, and it is generally estimated based on experience, which reduces the accuracy of cable length calculation

[0004] It can be seen that there are large errors in the existing calculation formulas for estimating the length of the towline. The length of the towline is related to multiple parameters. The calculation of the cable length needs to monitor the number of turns of the winch in real time, and other parameters will also be different during the towing process. A certain deviation makes the accuracy of the calculation result of the cable length low, and it is necessary to measure the number of turns of the winch in real time, which increases the complexity of the measurement process

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