Cable taking-up/paying-off control system of hydrographic winch

Abstract

The invention discloses a cable taking-up / paying-off control system of a hydrographic winch, wherein a rope arranging wheel and a guide wheel are configured in parallel fore and aft in the withdrawing direction of a cable rope on a winding reel fixed on a deck; the withdrawing end of the cable rope passes by the upper edges of the rope arranging wheel and the guide wheel, is withdrawn downwards and is put into water for hanging a load; a rotary encoder is configured on the rotary central axis of the rope arranging wheel or the guide wheel; the rotary encoder sends a count pulse signal to a movement controller; the accumulative amount of pulses sent by the rotary encoder corresponds to the cable taking-up / paying-off length of the cable rope; and the count pulse number of the rotary encoder in a current sampling period corresponds to the current cable taking-up / paying-off speed of the cable rope. The cable taking-up / paying-off control system of the hydrographic winch can precisely measure and calculate the cable taking-up / paying-off length, the current cable taking-up / paying-off speed and the pulling force of the cable rope; the movement control is taken as a control core, and a control system directly drives the valve members of various valve sets of a hydraulic pump station; and the whole system has a simple structure, high reliability, impact resistance, shock resistance, water proofing and dust proofing effects, is more applicable to a ship or equipment moving outdoors, and is convenient for a user to mount and place.

Description

technical field [0001] The invention relates to a hydrological winch, in particular to a control system for receiving / releasing a cable of a hydrological winch. Background technique [0002] As a marine equipment, the hydrological winch is generally used on scientific research ships and survey ships. It is a special mechanical transmission suspension device for sending hydrological test instruments and equipment to designated test points during hydrological tests. [0003] The cable take-up / release control system of a traditional hydrological winch mainly includes a programmable controller (hereinafter referred to as PLC), an intermediate relay, a proportional amplifier board, a hydraulic system, a bobbin, and a cable. The cable is tightly wound on the bobbin, and the winding A rotary encoder is installed on the barrel, and the signal of the rotary encoder is connected to the PLC. The PLC controls the hydraulic system through the intermediate relay and the proportional ampli...

AI Technical Summary

Problems solved by technology

At the same time, it is also because there is a difference in the length of the retracted / released cable every time the reel rotates. Even if the reel rotates at a certain constant speed, the retracting / rewinding speed of the inner layer cable and the outer layer cable is also inconsistent. So the underwater load cannot go up / down with a constant value

[0005] The traditional hydrological winch retracting / releasing cable control system cannot accurately measure the underwater position of the load, and lacks effective monitoring of the lowering speed of the load. When working at a depth of 6,000 meters or even deeper, the difference between the calculated value and the actual position of the hydrological equipment will become very large, and the data returned by the hydrological equipment cannot truthfully reflect the real situation. security risks

[0006] At the same time, since PLC is the control core, the current signal volume of its control loop is much smaller than the working current signal volume of the solenoid valve and proportional valve in the hydraulic system used to drive the bobbin, so it can only be amplified by controlling the intermediate relay and proportional amplifier After the signal, the solenoid valve and proportional valve in the hydraulic system are driven. When the electro-hydraulic control system is more complicated, it is often necessary to control more valve groups, so that there are more intermediate circuits, that is, intermediate relays and proportional amplifiers. The control of the electro-hydraulic system The circuit is very complicated and the reliability of the system is reduced

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