JP2012155457A - Ship approach monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ship approach monitoring device capable of accurately and surely warning even unspecified number of ships not provided with a device which detects their approach to a power transmission line of risk of contact with the power transmission line.SOLUTION: A ship approach monitoring device 50 includes: power transmission lines 12 laid between iron towers 5 installed on both banks; a plurality of warning lamps 6 installed on each of the iron towers 5; warning receivers 7 which receive a warning signal and light the warning lamps 6; and monitoring towers 1 which are installed on both banks at a prescribed distance from the power transmission lines 12.

Description

  The present invention relates to a ship approach monitoring device, and more specifically, when there is a risk that a ship equipped with a crane or the like that passes under a power transmission line installed above a water channel through which the ship passes may come into contact with the power transmission line. The present invention relates to a ship approach monitoring device that issues an alarm to the ship.

  Many transmission lines for transmitting high-voltage power are installed on power transmission towers installed in mountainous areas or on land, but depending on geographical conditions, they are installed so as to cross over narrow waterways such as canals or rivers. Sometimes it is done. In a place where the water depth of a canal or river is shallow, a relatively small ship navigates, so that the height of the uppermost part of the ship is hardly higher than the lowest point of the transmission line. On the other hand, in large canals or rivers with deep water depths, large ships equipped with tall equipment such as cranes often sail, and the upper part of the crane etc. is higher than the lowest point of the transmission line. Accidents such as contact with the transmission line or disconnection of the transmission line may occur. However, since it is not always possible to monitor these ships at all locations, it is impossible to prevent all accidents from occurring.

As a prior art for preventing such an accident, Patent Document 1 discloses that when heavy machinery such as a crane is being used in the vicinity of a power transmission line, the heavy machinery does not contact the power transmission line. In the monitoring method, a heavy equipment approach monitoring method capable of issuing an alarm without being influenced by the voltage of the transmission line or weather conditions is disclosed.
Further, Patent Document 2 discloses a wireless proximity alarm device that issues an alarm by sensing the approach of a contact avoidance target with respect to an electromagnetic field generator that exists at a long distance from what receives an alarm. .
Patent Document 3 discloses an approach warning device that includes a sensor attached to a crane tip and a monitoring device arranged in a crane operation room, and issues a warning when the crane approaches a certain distance from a power transmission line. Has been.
Patent Document 4 discloses a laser beam approach detection system that detects that a heavy machine such as a crane has approached the power transmission line.

Japanese Patent Laid-Open No. 5-35986 JP 2005-148968 A JP 2006-199440 A JP 2006-201030 A

However, the prior art disclosed in Patent Documents 1 to 4 needs to be equipped with a device for sensing that the crane has approached the power transmission line at the tip of the crane, and for cranes that are not equipped with these devices. There is a problem that it is not possible to monitor whether or not there is a possibility of contact with the transmission line.
The present invention has been made in view of such problems, and when there is a power transmission line installed across the water channel above the water channel, there is a possibility that the upper part of the ship passing through the water channel may contact the power transmission line It is an object of the present invention to provide a ship approach monitoring device capable of accurately and reliably warning the danger of contact with a power transmission line even for an unspecified number of ships that do not have a device for detecting the above.

In order to solve this problem, the present invention provides a ship approach that issues an alarm to a ship when there is a risk of the ship coming into contact with a power transmission line installed above the traveling path of the ship. A monitoring device that is arranged upstream of the power transmission line in the traveling direction of the ship and detects the passage of the ship; and a wind speed that detects a wind speed around the ship detected by the ship detection means Measuring means, speed measuring means for detecting the speed of the ship detected by the ship detecting means, wave height change value measuring means for measuring a change in wave height when another ship passes, and the ship being the ship detecting means A time measuring means for measuring the time from the start of passage to the end of passage, and the ship length of the ship is calculated based on the values measured by the speed measuring means and the time measuring means, and the ship length and the wave height Change value measurement Control means for determining whether or not the ship may be in contact with the power transmission line based on a wave height operation value measured by a stage; and the control means may be in contact with the power transmission line. A signal transmitting means for transmitting an alarm signal to the ship, a signal receiving means for receiving the alarm signal transmitted from the signal transmitting means, provided in a steel tower that stretches the power transmission line, And a warning means which is provided in a steel tower and issues a warning to the ship when the warning signal is received by the signal receiving means.
The present invention determines whether or not to issue an alarm for the height of a ship approaching a power transmission line based on the hull length and wave height change. That is, a sensor for detecting the passage of a ship is installed upstream of the power transmission line in the traveling direction of the ship, and when the ship is detected by this sensor, the hull length of the ship is calculated from the passage time and speed of the ship. When the hull length is equal to or longer than a predetermined length, a wave height change value is determined based on the wave height and wind speed at that time, and an alarm is issued to the ship when the change value exceeds a predetermined value. Thereby, it is possible to warn of the danger of contact with the power transmission line accurately and reliably to a large number of unspecified ships.

According to a second aspect of the present invention, when the calculated hull length is equal to or greater than a set value and the operation value of the wave height change measured by the wave height change value measuring means is equal to or greater than a set value, The transmission means is instructed to transmit the alarm signal.
Ships tend to increase in height in proportion to their hull length. Therefore, in the present invention, the hull length is calculated from the product of the time and speed at which the ship passes the sensor. And when it is more than the preset hull length, the presence or absence of a possibility of contacting a power transmission line is judged. At that time, the wave height is not always constant. That is, when a large ship passes in the vicinity, the change value of the wave height increases, and it increases as the wind speed increases. Therefore, an alarm signal is issued when the operating range of the wave height set based on the wind speed exceeds a set value. As a result, not only the hull length but also the fluctuations in the height of the ship due to wave height changes can be accurately captured.

According to a third aspect of the present invention, when the warning is given to the ship, the control means records the transit time, wind speed, and wave height data of the ship at that time.
By issuing an alarm to the ship, the ship is stopped or moved backward to avoid a power line contact accident in advance. However, there are some ships that pass by ignoring the warning. At that time, although not necessarily in contact with the transmission line, in order to verify the accuracy of the alarm later, the passage time, wind speed, and wave height data at the time of the alarm are recorded. As a result, it is possible to verify the accuracy of the alarm and use it as evidence data for the ship at the time of the accident.

According to a fourth aspect of the present invention, when the control unit issues an alarm to the ship, the control unit simultaneously transmits the alarm to a control station that manages the transmission line.
When an alarm is issued to a ship, the ship may contact the power transmission line and cut the power transmission line. Therefore, in the present invention, assuming that such an accident occurs, the fact that an alarm has been issued is also transmitted to the control station that manages the operation of the transmission line. As a result, it is possible to prepare a system that can immediately cope with an unexpected situation.

Claim 5 comprises light emitting means for emitting a light beam horizontally from a height position corresponding to the lowest point of the power transmission line, and light receiving means for receiving the light beam, wherein the control means is the ship detecting means. When a ship is detected by the above, a light beam is emitted by the light emitting means, and an alarm is issued to the ship when the light receiving means does not receive the light beam continuously for a predetermined time.
The present invention provides a light beam emitting means and a light receiving means at a position corresponding to the lowest point of the power transmission line in order to detect the actual height of the ship before the place where the power transmission line is installed, When a ship is detected, a light beam is emitted from the light emitting means. When the ship is lower than the lowest point of the power transmission line, light is detected by the light receiving means, but when the ship has a portion higher than the lowest point of the power transmission line, it works to block the light beam. Thereby, the ship with a possibility of contacting a power transmission line can be determined immediately.

Claim 6 is provided in a steel tower of the power transmission line, further comprising a ship photographing means for photographing the ship with a lowest point of the power transmission line as a reference line, and the control means detects the ship by the ship detection means. Then, shooting of the ship is started by the ship shooting means, the distance between the reference line of the power transmission line and the ship is measured based on the shot image, and when the distance is equal to or less than a predetermined value, A warning is given to the ship.
The present invention is provided with an imaging means such as a camera in a steel tower of a power transmission line. When a ship is detected, the ship is started to be photographed, and based on the image, the reference line of the ship and the power transmission line (transmission line The distance to the lowest point is measured, and if it is smaller than a predetermined value, an alarm is issued. As a result, it is possible to simultaneously determine whether or not to issue a ship record and an alarm.

According to the present invention, when the hull length is equal to or longer than a predetermined length, a wave height change value is determined based on the wave height and wind speed at that time, and when the change value exceeds a predetermined value, Since the alarm is issued, it is possible to warn the danger of contact with the transmission line accurately and reliably to an unspecified number of ships.
Further, since an alarm signal is issued when the operating range of the wave height set based on the wind speed exceeds the set value, not only the hull length but also the fluctuation in the height of the ship due to the wave height change can be accurately captured.
Further, since the transit time, wind speed, and wave height data at the time of alarm occurrence are recorded, it can be used as verification data of the alarm accuracy and evidence data for the ship at the time of the accident occurrence.
In addition, in the event of a power line disconnection accident, the fact that a warning has been issued is also sent to the control center that manages the power line, so a system should be prepared that can respond immediately even if an unexpected situation occurs. Can do.
Further, a light beam emitting means and a light receiving means are provided at a position corresponding to the lowest point of the power transmission line. When a ship is detected, the light beam is emitted from the light emitting means. If the ship is lower than the lowest point of the transmission line, light is detected by the light receiving means, but if the ship has a part higher than the lowest point of the transmission line, it works to block the light beam. Ships that are likely to come into contact with can be immediately determined.
When a ship is detected, the ship is started to be photographed. Based on the image, the distance between the ship and the reference line of the power transmission line (the lowest point of the power transmission line) is measured by image processing or the like. Since the alarm is issued in the case of being small, it is possible to simultaneously determine the record of the ship and whether or not to issue the alarm.

It is a figure which shows the structure of the ship approach monitoring apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the ship approach monitoring apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the monitoring tower of this invention. It is a block diagram which shows the structure of the alarm receiver of this invention. It is a flowchart explaining operation | movement of the ship approach warning apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart explaining operation | movement of the ship approach warning apparatus which concerns on the 2nd Embodiment of this invention.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

  FIG. 1 is a diagram showing a configuration of a ship approach monitoring apparatus according to the first embodiment of the present invention. A ship approach monitoring device 50 according to the present invention includes a power transmission line 12 installed on a steel tower 5 installed on both banks of a river (water channel) 8, a plurality of alarm lamps 6 installed on each steel tower 5, and An alarm receiver 7 for receiving an alarm signal and turning on an alarm lamp 6; and a monitoring tower 1 installed on both banks upstream (right side in FIG. 1) in the traveling direction (arrow) of the ship 3 with respect to the transmission line 12. , And is configured. In this embodiment, each of the monitoring towers 1 is provided with an antenna 2, and a radio wave 10 of an alarm signal is transmitted to the alarm receiver 7 via the antenna 2. Moreover, the monitoring tower 1 is provided with each apparatus shown in FIG.

Next, the operation of the ship approach monitoring apparatus of the present invention will be described with reference to FIG. In FIG. 1, the case where the ship 3 provided with the crane 4 which moves on the river 8 in the advancing direction shown with the arrow approaches the power transmission line 12 located in the advancing direction downstream is demonstrated. When the ship 3 approaches the vicinity of the monitoring tower 1, the ship detection sensor 21 (see FIG. 3) detects that the ship 3 has passed through the monitoring tower 1. The monitoring tower 1 measures the speed of the ship 3 at the time of measurement and the time required to pass through the monitoring tower 1. Furthermore, the wind speed at the time of measurement and the peak value generated in the river 8 are measured.
When the ship 3 passes through the monitoring tower 1, the hull length of the ship 3 is calculated from the speed and the passing time. The hull length can be easily calculated from the transit time and speed. Here, when the hull length exceeds a predetermined specified value, it is estimated that there is a possibility that the highest position of the equipment mounted on the ship may interfere with the transmission line. As a result of the calculation, if the hull length is larger than the prescribed hull length, it is determined that the height of the highest point of the ship 3 may come into contact with the transmission line 12, and the highest point of the ship 3 is determined from the wave height value and the wind speed. When it is determined that the height is equal to or greater than a predetermined value, a radio wave 10 of an alarm signal is transmitted from the monitoring tower 1. The radio wave 10 is received by the antenna 23 of the alarm receiver 7 provided in the steel tower 5, and the alarm lamps 6 are turned on all at the same time, and at the same time, the ship 3 is informed that an alarm has been issued. When the ship 3 confirms that the alarm lamp 6 is lit, the ship 3 is stopped. In this case, the crane 4 may be lowered, temporarily retracted and passed through the monitoring tower 1 again to check whether or not it can pass. Further, the monitoring tower 1 transmits the radio wave 10 of the alarm signal to the alarm receiver 7 and notifies the control station that manages the power transmission line 12 to that effect.

  In the present embodiment, it is determined whether or not to issue an alarm for the height of the ship 3 approaching the power transmission line 12 based on the hull length and the change in wave height. That is, when a ship detection sensor 21 (see FIG. 3) that detects the passage of the ship 3 is installed upstream of the power transmission line in the traveling direction of the ship 3 and the ship detection sensor 21 detects the ship 3, The hull length of the ship 3 is calculated from the time and speed. When the hull length is equal to or longer than a predetermined length, a wave height change value is determined based on the wave height and wind speed at that time, and an alarm is issued to the ship 3 when the change value exceeds a predetermined value. Thereby, it is possible to warn of the danger of contact with the power transmission line 12 accurately and reliably to a large number of unspecified ships.

  FIG. 2 is a diagram showing a configuration of a ship approach monitoring apparatus according to the second embodiment of the present invention. As shown in FIG. 2B, the ship approach monitoring apparatus 51 according to the present invention is a laser transmitter (light emission) that emits a light beam 11 horizontally from a height position H corresponding to the lowest point A of the transmission line 12. Means) 26 (see FIG. 3) and a laser receiver (light receiving means) 27 (see FIG. 3) for receiving the light beam 11, and when the ship 3 is detected by the ship detection sensor 21 (see FIG. 3), the laser transmitter 26 emits the light beam 11 and issues a warning to the ship 3 when the laser receiver 27 does not receive the light beam 11 continuously for a predetermined time. That is, in this embodiment, in order to detect the actual height of the ship 3 before the place where the power transmission line 12 is installed, the light beam 11 is positioned at a position H corresponding to the lowest point A of the power transmission line 12. A laser transmitter 26 and a laser receiver 27 are provided, and when the ship 3 is detected, the light beam 11 is emitted from the laser transmitter 26. When the ship 3 is lower than the lowest point A of the power transmission line 12, light is detected by the laser receiver 27, but when the ship 3 is higher than the lowest point A of the power transmission line 12, the light beam 11 is detected. Work to block. Thereby, the ship which may be in contact with the power transmission line 12 can be determined immediately.

  Although not shown in the drawings, as a third embodiment of the present invention, a camera (ship imaging means) that is provided on the tower 5 of the transmission line 12 and images the ship 3 with the lowest point A of the transmission line 12 as a reference line. ), And when the ship detection sensor 21 (see FIG. 3) detects the ship 3, the camera starts photographing the ship 3, and based on the photographed image, the distance between the reference line of the power transmission line 12 and the ship 3 is determined. When the measurement is performed and the separation distance is equal to or smaller than a predetermined value, a warning is issued to the ship 3. That is, in this embodiment, an imaging means such as a camera is provided in the steel tower 5 of the power transmission line 12, and when the ship 3 is detected, the ship 3 is started to be photographed. The distance from the reference line (the lowest point A of the transmission line) of the electric wire 12 is measured, and an alarm is issued when the distance is smaller than a predetermined value. Thereby, it is possible to simultaneously determine whether or not to record the ship 3 and issue an alarm.

  FIG. 3 is a block diagram showing the configuration of the monitoring tower of the present invention. The monitoring tower 1 of the present invention is disposed upstream of the power transmission line 12 in the traveling direction of the ship 3 and is detected by a ship detection sensor (ship detection means) 21 that detects the passage of the ship 3 and the ship detection sensor 21. An anemometer (wind speed measuring means) 20 for detecting the wind speed around the ship, a speedometer (speed measuring means) 22 for detecting the speed of the ship detected by the ship detection sensor 21, and a change in wave height when the ship 3 passes. A wave height detection sensor (wave height change value measuring means) 23, a timer (time measuring means) 24 for measuring the time from when the ship 3 starts to pass through the ship detection sensor 21 until it finishes passing, a speedometer 22 and A control unit that calculates the hull length of the ship 3 based on the timer 24 and determines whether or not the ship 3 may contact the power transmission line 12 based on the hull length and the operation value detected by the wave height detection sensor 23. ( And a transmitter (signal transmission means) 25 that transmits an alarm signal to the ship 3 when the control unit 28 determines that the ship 3 may come into contact with the power transmission line 12. Has been. In the case of the second embodiment, a laser transmitter 26 and a laser receiver 27 are further provided.

  FIG. 4 is a block diagram showing the configuration of the laser receiver of the present invention. The laser receiver 27 according to the present invention includes a receiving unit 30 that receives an alarm signal 10 from an antenna 33, a control unit 31 that demodulates the alarm signal to determine whether it is an alarm signal, and an alarm signal. And a lamp driving unit 32 that turns on the alarm lamp 6 when the alarm lamp 6 is turned on.

  FIG. 5 is a flowchart for explaining the operation of the ship approach monitoring apparatus according to the first embodiment of the present invention. The case where the ship 3 provided with the crane 4 in the river 8 approaches the power transmission line 12 will be described. First, when the ship 3 approaches the vicinity of the monitoring tower 1, the ship detection sensor 21 detects that the ship 3 has passed through the monitoring tower 1 (Y in S1). The monitoring tower 1 measures the wind speed near the ship 3 at that time (S2), and measures the speed of the ship 3 (S3). At that time, the timer 24 is started (S4), and the time until passing through the monitoring tower 1 is measured (S5). When the ship 3 passes through the monitoring tower 1 (Y in S5), the hull length of the ship 3 is calculated from the speed and the passing time (S6). The hull length can be easily calculated from the transit time and speed. As a result of the calculation, if the hull length is larger than the prescribed hull length (Y in S7), it is determined that the height of the ship 3 may come into contact with the transmission line 12, and is detected by the wave height detection sensor 23. The operation value of the ship 3 is measured from the wave height value and the wind speed (S8). As a result of the measurement, when it is determined that the height of the ship exceeds a predetermined value (Y in S9), the radio wave 10 of the alarm signal is transmitted from the transmitter 25 of the monitoring tower 1 via the antenna 2 (S10). The radio wave is received by the alarm receiver 7 provided in the steel tower 5, and the alarm lamps 6 are turned on all at once, and at the same time, the ship 3 is informed that an alarm has been issued (S11). When the ship 3 confirms that the alarm lamp 6 is lit, the ship 3 is stopped. In this case, the crane 4 may be lowered, temporarily retracted and passed through the monitoring tower 1 again to check whether or not it can pass. In addition, the monitoring tower 1 transmits an alarm signal to the alarm receiver 7 and notifies the control station that manages the power transmission line 12 (S12). Then, the passage time, wind speed, and wave height data of the ship 3 when the alarm is issued are stored in the memory of the control unit 28 (S13).

  FIG. 6 is a flowchart for explaining the operation of the ship approach warning device according to the second embodiment of the present invention. The case where the ship 3 provided with the crane 4 in the river 8 approaches the power transmission line 12 will be described. First, when the ship 3 approaches the vicinity of the monitoring tower 1, the ship detection sensor 21 detects that the ship 3 has passed the monitoring tower 1 (S21). When the ship 3 is detected (Y in S21), laser light is emitted from the laser transmitter 26 (S22), and it is checked whether the laser receiver 27 blocks the laser light for a predetermined time or more (S23). If the laser receiver 27 does not block the laser beam for a predetermined time or longer (N in S23), the laser beam is stopped (S28). If the laser receiver 27 blocks the laser beam for a predetermined time or more in step 23 (Y in S23), the alarm signal radio wave 10 is transmitted from the transmitter 25 of the monitoring tower 1 via the antenna 2 (S24). The radio wave 10 is received by the alarm receiver 7 provided in the steel tower 5, and the alarm lamps 6 are turned on all at once, and at the same time, the ship 3 is informed that an alarm has been issued (S25). When the ship 3 confirms that the alarm lamp 6 is lit, the ship 3 is stopped. In this case, the crane 4 may be lowered, temporarily retracted and passed through the monitoring tower 1 again to check whether or not it can pass. Further, the monitoring tower 1 transmits an alarm signal to the alarm receiver 7 and informs the control station that manages the power transmission line 12 (S26). Then, the passage time, wind speed, and wave height data of the ship 3 when the alarm is issued are stored in the memory of the control unit 28 (S27).

1 monitoring tower, 2 antenna, 3 ship, 4 crane, 5 steel tower, 6 alarm lamp, 7 alarm receiver, 8 river, 9 shores, 10 alarm signal, 11 laser light, 12 power transmission line, 20 anemometer, 21 ship detection Sensor, 22 Speedometer, 23 Wave height detection sensor, 24 Timer, 25 Transmitter, 26 Laser transmitter, 27 Laser receiver, 28 Control unit, 30 Receiver unit, 31 Control unit, 32 Lamp drive unit, 50, 51 Ship approach Monitoring device

Claims (6)

A ship approach monitoring device that issues an alarm to the ship when there is a risk of the ship coming into contact with a power transmission line installed above the traveling path of the ship,
A ship detection means arranged on the upstream side of the power transmission line in the traveling direction of the ship to detect the passage of the ship;
Wind speed measuring means for detecting the wind speed around the ship detected by the ship detecting means;
Speed measuring means for detecting the speed of the ship detected by the ship detecting means;
A wave height change value measuring means for measuring a wave height change when another ship passes,
Clocking means for timing the time from the start of passage of the ship through the ship detection means to the end of passage;
The ship length of the ship is calculated based on the values measured by the speed measuring means and the time measuring means, and the ship sends the ship height based on the hull length and the wave height change value measured by the wave height change value measuring means. Control means for determining whether there is a risk of contact with the electric wire;
A signal transmission means for transmitting an alarm signal to the ship when the control means determines that the ship may be in contact with the power transmission line;
A signal receiving means for receiving the alarm signal transmitted from the signal transmitting means, provided in a steel tower that stretches the power transmission line;
An alarm means for providing an alarm to the ship when the alarm signal is received by the signal receiving means provided in the tower;
A ship approach monitoring device comprising:   When the calculated hull length is equal to or greater than a set value, and the operation value of the wave height change measured by the wave height change value measuring means is equal to or greater than a set value, the control means The ship approach monitoring apparatus according to claim 1, wherein an instruction is given to transmit the warning signal.   3. The ship approach monitoring according to claim 1, wherein when the alarm is issued to the ship, the control unit records the transit time, wind speed, and wave height data of the ship at that time. apparatus.   4. The ship approach according to claim 1, wherein when the warning is issued to the ship, the control means simultaneously transmits the warning to a control station that manages the operation of the power transmission line. Monitoring device. A light emitting means for emitting a light beam horizontally from a height position corresponding to the lowest point of the power transmission line, and a light receiving means for receiving the light beam,
The control means emits a light beam by the light emitting means when detecting the ship by the ship detecting means, and warns the ship when the light receiving means does not receive the light beam continuously for a predetermined time. The ship approach monitoring apparatus according to claim 1, wherein Provided in a steel tower of the power transmission line, further comprising a ship photographing means for photographing the ship with a lowest point of the power transmission line as a reference line;
When the ship is detected by the ship detection means, the control means starts photographing the ship by the ship photographing means, measures a distance between the reference line of the power transmission line and the ship based on the photographed image, The ship approach monitoring apparatus according to claim 1, wherein an alarm is issued to the ship when the separation distance is equal to or less than a predetermined value.

Images