JPS5843964B2 - Tote wire speed detection device - Google Patents

Description

[Detailed Description of the Invention] The present invention is for attaching a submarine cable by letting out a tote wire made of piano wire or the like mounted on a cable ship into the sea as the cable ship moves forward, and detecting the speed at which the wire is being let out. The present invention relates to a tote wire speed detection device capable of detecting the ground speed of a ship from the unwinding speed.

A conventional tote wire speed detection device has a drum 2 supported by a pedestal 1 as shown in FIG. Further, the end of the tote wire 3 is passed through a flyer 5 attached via a shaft to a brake 4 that adjusts the tension of the tote wire 3, and then passed through a guide roller 7 of a speed measuring mechanism 6.
It is wound around a counter wheel 8 one turn, passed through guide sheaves 9, 10, and 11, and a weight is attached to it before being thrown into the sea.

This tote wire 3 is paid out as the ship moves forward, and when a counter wheel 8 rotates in response to this feeding, the rotation of the counter wheel 8 drives a speed measuring mechanism 6 consisting of a tachometer generator via a timing belt or the like. The payout speed of the tote wire 3 is detected from the output signal from the speed measuring mechanism 6, and this is inputted as a ground speed signal to the slack control device of the cable engine for slanok control.

However, since the conventional speed measuring mechanism 6 is formed of a tachometer generator whose voltage changes according to rotation, when the tachometer generator detects the unwinding speed of the tote wire 3, an output signal is generated depending on the pitching or rolling of the ship. fluctuates greatly.

For this reason, if slack control was performed using the output signal of the tachometer generator, the signal would fluctuate so much that there was a danger that the cable engine drum would cause a hunting phenomenon.

For this reason, it may be possible to install a smoother to smooth the output signal in the output signal circuit of the tachometer generator, but if this is done, the ship's ground speed will not be faithfully transmitted and the cable installation accuracy will be reduced. was there.

The present invention has been made in view of the above-mentioned circumstances, and its object is to be able to accurately detect the payout speed of the tote wire without being affected by pitching, rolling, etc., and to detect the average height of the cable ship attached to the cable. An object of the present invention is to provide a tote wire speed detection device that can accurately detect speed.

That is, the present invention includes a counter wheel that rotates in response to the delivery of a tote wire from a ship into the sea;
A pulse transmitter that emits a number of pulses proportional to the number of rotations of the wheel; an integrating counter that counts the number of pulses generated from the pulse transmitter within a preset time by a gate controller; and the integrating counter. A divider that calculates the number of pulses per unit time from the pulse signal integrated by D, and D that converts the number of pulses obtained by the divider into analog.
This is a tote wire speed detecting device which is provided with a /A converter, averages the unwinding speed of the tote wire every unit time, and detects this as an analog signal.

The present invention will be explained in detail below.

The structure for feeding out the tote wire 3 into the sea is similar to the conventional one shown in FIG. and guide sheave 9,10
．． 11 and was thrown into the sea.

A speed measuring mechanism 12 detects the feeding speed of the tote wire 3 according to the rotation of the counter wheel 8.
As shown in FIG. 2, an integration counter 15 equipped with a gate controller 14 is connected to the pulse generator 13, and a D/A converter 17 is connected to the integration counter 15 via an arithmetic unit 16.
are connected.

The pulse transmitter 13 is driven by the rotation of the counter wheel 8, and emits a number of pulses proportional to the number of rotations of the wheel 80 (for example, 10 pulses for each rotation of the counter wheel 8).

The integration counter 15 connected to the output side of the pulse generator 13 counts the pulses from the pulse generator 13 for a certain period of time, and the integration counter 15 can arbitrarily set the integration time by the gate controller 14. ing.

A divider 16 connected to the output side of the integration counter 15 calculates the number of pulses per unit time, and the result of this calculation indicates the average feeding speed of the tote wire 3.

Further, a D/A converter 17 connected to the output side of the divider 16 is configured to apply the number of pulses, that is, a digital signal outputted by the divider 16, as an input signal to an analog type cable engine slack control device. Convert to analog signal.

Further, although not shown, the output side of the D/A converter 17 is connected to the input end of a cable engine slack control device (not shown), and slack control is performed based on the output signal of the input converter 17. It is supposed to be done.

The tote wire speed detection device that was intercepted as described above is such that the tote wire 3 is paid out as the ship moves forward, the counter wheel 8 rotates in accordance with this feeding, and pulses are sent from the pulse transmitter 13 in proportion to the counter wheel 80 rotations. is sent.

After the pulses are integrated by an integration counter 15 for a certain period of time, a divider 16 calculates the number of pulses per unit time.

In this case, the integrated time is set by the gate controller 14 to an extent that hunting does not occur, depending on the hunting situation of the cable engine drum.

The number of pulses per unit time output as a digital signal from the divider 16 is converted into an analog signal by a D/A converter 17, and the slack control device of the cable engine is controlled based on this analog signal.

In this way, the feeding speed of the tote wire 3 is calculated by the integrating counter 1 for each unit time set by the gate controller 14.
4 and the divider 16 and then converted to analog by the D/A converter 17, the average feeding speed of the tote wire 3 output from the D/A converter 17 is smoothed and its fluctuations are reduced. Since it is averaged for each unit time, errors do not accumulate even after a long period of time, and the accuracy of the average movement speed is high.

As explained above, according to the present invention, the unwinding speed of the tote wire is extracted as a digital signal and averaged, so that even if the ship pitches or rolls due to waves, the average speed of the ship over the ground is maintained without being affected by these adverse effects. can be detected with high precision, and is extremely suitable for controlling a cable engine slack control device using the output signal from this tote wire speed detection device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional tote wire speed detection device, and FIG. 2 is a block diagram of a speed measurement mechanism showing an embodiment of the present invention. 2...Drum, 3...Tote wire,
8... Counter wheel, 12...
Speed measurement mechanism, 13...Pulse transmitter, 14.
...K) Controller, 15... Integration counter, 16... Divider, 17...
D/A converter.

Claims (1)

[Claims] 1. A counter wheel that rotates as the tote wire is fed out from the ship into the sea, a pulse transmitter that emits a number of pulses proportional to the number of rotations of the wheel, and An integration counter that counts the number of pulses generated within a set time, a divider that calculates the number of pulses per unit time from the pulse signal integrated by the integration counter, and the number of pulses obtained by the divider. A tote wire speed detection device is provided with a D/A converter for analog conversion, and is configured to average the unwinding speed of the tote wire every unit time and detect it as an analog signal.