SU750443A1 - System for control ship position in dock - Google Patents

Description

one

The invention relates to the field of shipbuilding, in particular to devices for centering ships at dock.

A device for centering ships in dry dock is known, which includes two laser emitters located behind the coastal end of the dock, generating two parallel beams. The rays pass symmetrically with respect to the center line of the dock and are projected onto the luminous screen mounted on the vessel 1.

The specified device has a limited scope, provides for the installation of additional elements on the vessel. Automate the process is possible with the use of additional indicator devices.

Closest to the proposed technical entity is the ship position control system in the dock, which includes an ultrasonic receiving and transmitting device consisting of several rows of ultrasonic vibrators installed at the bottom of the dock symmetrically relative to its longitudinal axis. In each row, the vibrators are mounted as a chain running in a healing direction. The system also includes a switching unit that changes, with a given time delay, the operating modes of the transmitting / receiving vibrators, as well as the operating modes of the master oscillator and the receiving and amplifying unit, and the docking position indicator of the vessel, which responds to the output signal amplifier unit 2.

The accuracy of this system depends on the installation of vibrators. Large amount

10 vibrators determine the complexity of the switching unit and the considerable length of cable lines.

The purpose of the invention is to increase accuracy and simplify the system.

This goal is achieved by the fact that

 system containing ultrasonic vibrators located at the same level symmetrically with respect to the median plane of the dock, switching unit, transmission signal generating unit, first unit

20 generation of receiving signals and a display unit, a delay unit, a comparison unit, a second reception signal generation unit, and ultrasonic vibrators are installed in pairs on the main docks

against each other, the first ultrasonic vibrators of all pairs through the switching unit are connected respectively to the first inputs of the first and second reception signal generation units, and the second ultrasonic vibrators of all pairs to the corresponding first outputs of the transmission signal generation unit, the second outputs of which are connected to the second inputs the first and second blocks of formation of the receiving signals, and the third output - with the input of the delay unit, the outputs of which are connected to the third inputs of the first and second blocks The receiving signals, the output of the comparison unit is connected to the input of the display unit, and the inputs are connected to the outputs of the first and second receiving signal generation units.

FIG. 1 shows a block diagram of the proposed system; in fig. 2 - installation diagram of ultrasonic vibrators; in fig. 3 shows section A-A in FIG. 2

The system includes two channels, fore and aft, and contains a switching unit 1, a transmission signal generation unit 2 consisting of a master oscillator 3 and a pulse generator 4, a delay unit 5 consisting of a delay element 6 and a standby multivibrator 7, two blocks 8 and 9 formed n reception signals, consisting of selective amplifiers 10 and 11, Schmidt trigger 12 and 13, blocking oscillators 14 and 15 with delayed feedback, the block

16 comparison, consisting of a phase inverter

17 and integrator 18, the display unit 19, consisting of a dial gauge 20 and a phase-sensitive relay 21. The ultrasonic vibrators of the nasal canal are indicated by flat lines, and the feed ones by dashed lines. Each of the channels has two ultrasonic vibrating receiver 22, 23, 24 and 25 and two ultrasonic vibrating radiators 26, 27 and 28, 29 united in pairs “radiator-nickname”, which are mounted on the dock bristle symmetrically relative to its diametral plane on one level. Receiver 22 and radiator 26 are mounted on the right bashna, and receiver 23 and radiator 27 on the left.

The system works as follows.

The pulses from the master oscillator 3 are fed simultaneously to the pulse shaper 4, the blocking oscillators 14 and 15 with delayed feedback of the reception signal generation units, as well as through the delay element 6 to the waiting multivibrator 7. The generated pulses are radiated by the transmitting ultrasonic vibrators 26 and 27 and reflecting from the vessel's sides, fall on the receiving vibrators 22 and 23. The selected and amplified by selective amplifiers 10 and 11 pulses of a given frequency are formed into square pulses by the trigger 12 and IS

Schmidt and disrupt the generation of blocking generators 14 and 15, triggered by pulses of the master oscillator 3. Delay element 6 delays the launch of the standby multivibrator 7, which opens the inputs of the selective amplifiers for the duration of the pulse of the master oscillator 3. The duration of the open state of the selective amplifiers is determined by the duration of the pulses of the standby multivibrator 7 and is determined from the condition of the cut-off of the signals produced by the radiator of the opposite dock base.

Impulses of the blocking generators 14 and 15

. arrive at block 16 comparison, while

from the blocking generator 14 pulse arrives

the phase inverter 17, and then the integrator 18, and from the blocking generator 15 directly to the integrator 18. The number of pulses sent to the integrator depends on the generation time of the blocking generators, which is proportional to the distance between the ultrasonic vibrators and the sides of the vessel. The integrator 18 generates an analog signal, the amplitude and polarity of which depend on the difference in pulses received from the formation units of the receiving signals, and consequently, on the gap between the dock lacs and the sides of the vessel.

The resulting signal is fed to the display unit 19, the turnout indicator 20 of which registers the magnitude and direction of displacement of the median plane of the vessel being docked relative to the median plane of the dock, and the phase-sensitive relay 21 generates a signal used to actuate the executive mechanisms corresponding to the working channel.

The use of the device reduces the total number of ultrasonic sensors, the length of cable lines, and simplifies the overall system design.

Claims (2)

1. The patent of Germany No. 2357689, class B 63 from 1/10, published. 1976. 2. Japanese Patent No. 21629, cl. 84 k 2, publ. 1974 (prototype).