JP2000326891A - Notification device in vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a danger when a wave height of a prescribed value or more starts to generate by outputting a notification signal to a notification machine when a measured value or an arithmetic value from at least of either one of a distortion measuring device and an arithmetic part exceeds a prescribed value. SOLUTION: Distortion amount of a hull 5 is detected by a distortion measuring device, and a prescribed position 7 of the hull 5 and a first distance up to a top of a wave are measured by a measuring part. By arranging an accelerometer at the prescribed position 7 of the hull 5, detecting acceleration when the hull 5 moves in the vertical direction by the accelerometer, integrating acceleration according to oscillation of the prescribed position 7 from the accelerometer in an arithmetic part and calculating moving amount in the vertical direction of the whole of the hull 5, a second distance Z is determined. By subtracting the first distance 5 from the second distance Z, a wave height (h) from a still water level 9 is calculated. When a measured value or an arithmetic value from at least either one of the distortion measuring device and the arithmetic part exceeds a prescribed value, a notification signal is outputted to a notification machine. As a result, quantitative monitoring can be performed and a dangerous state is surely and quickly avoided even during the night and a safety voyage can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a notifying device for a ship, for example, for notifying a dangerous state of the marine environment generated during the navigation of the ship and the accompanying damage of the hull and notifying the user of the damage. .

[0002]

2. Description of the Related Art For example, if there is a large change in sea conditions while a ship is navigating, there is a risk that a large load acts on the hull, causing part of the hull to be distorted and damaged, or sinking or capsizing due to waves. . Therefore, it is necessary to avoid (evade) such a dangerous state. Conventionally, in order to avoid this danger, for example, a method has been adopted in which the captain makes a decision based on experience by visually observing changes in sea conditions.
However, in the case of human visual judgment, it is difficult to quantitatively grasp the degree of danger, and thus risk avoidance tends to be delayed. Especially at night, it was difficult to grasp the wave conditions, so the degree of danger increased.

[0003] In order to avoid the danger more reliably, it is conceivable to make use of marine information.

[0004]

However, since sea conditions in the ocean are difficult to accurately predict, they are still insufficient as information for reliably avoiding danger. In order to solve this, it is conceivable that a wave height detecting device is provided on the hull and the wave height is sequentially detected to avoid danger when a wave having a height higher than a predetermined value starts to be generated. But,
This crest detector is very expensive.

[0005] Therefore, an object of the present invention is to provide a notification device for a ship which can solve the above-mentioned problems.

[0006]

The object of the present invention is to provide a distortion measuring device for detecting a distortion of a hull and a first distance between a predetermined position of the hull and a peak of a wave. A measuring unit, a tilt angle detecting unit attached to the hull for detecting the tilt angle of the hull tilting with respect to the water surface of a preset height, and a hull arranged vertically at the center of gravity of the hull. An accelerometer that detects acceleration when exercising, and an alarm that issues an alarm in response to sea conditions, based on the inclination angle signal from the inclination angle detection unit, the amount of sway of the hull and the acceleration from the accelerometer A calculating unit for calculating a vertical movement amount of the entire hull based on the triangular function, the calculating unit obtaining a swing distance at which the predetermined position has swung from the still water surface based on the tilt angle signal. Calculated from the accelerometer A function of calculating a second distance by adding an operation value obtained by integration, and a function of calculating a wave height from a still water surface by subtracting the first distance from the second distance; A control unit having a function of outputting a notification signal to the annunciator when a measurement value or an operation value from at least one of the device and the operation unit exceeds a predetermined value.

In the above configuration, the distortion amount of the hull is detected by the distortion amount measuring device, the first distance between the predetermined position of the hull and the top of the wave is measured by the measuring unit, and the height determined by the inclination angle detecting unit is set in advance. The angle of inclination of the hull inclining with respect to the surface
The acceleration when the hull moves up and down is detected by an accelerometer located at the center of gravity of the hull, and the arithmetic unit uses a trigonometric function to determine the swing distance at which the predetermined position has swung from the still water surface based on the tilt angle signal. A second distance is obtained by adding a calculated value obtained by integrating the acceleration from the accelerometer to the calculated value obtained in Step 2, and a wave height from a still water surface is calculated by subtracting the first distance from the second distance. Then, when the measured value or the calculated value from at least one of the distortion measuring device and the calculation unit exceeds a predetermined value, the control unit controls to output a notification signal to the notification device.

[0008] Further, a strain amount measuring device for detecting a strain amount of the hull, a measuring unit for measuring a first distance between a predetermined position of the hull and a peak of a wave, and a measuring unit arranged at a predetermined position of the hull. An accelerometer that detects acceleration when the hull moves up and down, and an alarm that issues a warning according to sea conditions are provided, and a calculation that calculates the amount of sway of the hull based on the acceleration signal from the accelerometer is provided. A calculating unit that calculates a vertical movement amount of the entire hull by integrating acceleration caused by swinging of a predetermined position from the accelerometer to obtain a second distance; and Having a function of calculating the wave height from the still water surface by subtracting the first distance from the second distance,
When a measured value or a calculated value from at least one of the distortion measuring device and the calculating unit exceeds a predetermined value, a control unit having a function of outputting a notification signal to the notification device is provided. .

In the above configuration, the distortion amount of the hull is detected by the distortion amount measuring device, and the first distance from the predetermined position of the hull to the top of the wave is measured by the measuring unit. The acceleration when moving up and down is detected by the accelerometer, and the calculation unit calculates the amount of vertical movement of the entire hull by integrating the acceleration accompanying the swing of the predetermined position from the accelerometer, and calculates the second distance Is calculated by calculating the wave height from the still water surface by subtracting the first distance from the second distance, the measured value or the calculated value from at least one of the strain measuring device and the calculating unit is a predetermined value If it exceeds, an alarm signal is output to the alarm.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. As shown in FIG. 1, the notification device 1 for a ship according to the first embodiment of the present invention includes a measuring device 2 and an alarm issuing device 3 for a ship according to the embodiment of the present invention. Things.

As shown in FIGS. 1 and 2, the measuring device 2 includes a strain gauge (a distortion measuring device) for detecting the amount of distortion of the hull 5 at the time of navigation due to the strength of the wave 4 and the speed of the ship. One example) 6
A first measuring unit 8 for sequentially measuring a predetermined position of the hull 5, that is, a first distance の from the bow 7 to the peak 4a of the wave 4, and the hull 5 stored in advance as a reference height during navigation. In order to measure the angle θ inclined from the still water surface 9, for example, the second measuring unit (a goniometer is used) 10 disposed at the center of gravity O of the hull 5 and the vertical movement amount Δ of the center of gravity O (the entire hull)
accelerometer 11 located at the center of gravity O to calculate h
And the strain gauge 6, the first measuring unit 8, and the second measuring unit 1.
0 and a calculation unit 12 to which a measurement signal from the accelerometer 11 is input.

The calculating unit 12 calculates the tilt angle signal from the second measuring unit 10 and the distance L from the bow 7 in the bow-stern direction passing through the center (center of gravity) of the hull 5 from the reference height p. The function of calculating the vertical movement distance Z2 to the bow 7 using the following equation: Z2 = L · sinθ, and the function of integrating the acceleration detected by the accelerometer 11 twice to calculate the vertical movement amount Δh of the hull 5 Is added to the vertical movement distance Z2 and the vertical movement amount Δh, and the first vertical distance Z1 from the still water surface 9 to the bow portion 7 of the hull 5 is added, so that the bow portion 7 separates from the still water surface 9. It has a function of calculating the second distance Z and a function of calculating the wave height h from the still water surface 9 by subtracting the first distance か ら from the second distance Z (Z−ζ).

The strain gauge 6 is an example of a strain gauge, and is attached to each part of the hull 5 to measure the stress of the hull 5. The first measuring unit 8 uses an ultrasonic or microwave sensor as a relative wavefront meter. The alarm issuing device 3 receives the measured value of the strain gauge 6, the measured value from the first measuring unit 8, the tilt angle signal from the second measuring unit 10, and the calculated value from the accelerometer 11, and receives these values. (A notification command unit) 13 for determining whether the value exceeds a set value, a notification device 14 that performs a notification operation in response to a signal from the control unit 13, and the control unit 1
And a transmission unit 15 for sequentially backing up a notification log (notification time), a measured value, and a calculated value at the time of issuing the notification signal monitored in 3 to the calculation unit 12.

The annunciator 14 includes different types of informing units, that is, an attention lamp (yellow lamp) 14a for calling attention, an alarm lamp (red lamp) 14b for issuing an alarm, and an alarm buzzer. 14c. In the above configuration, as shown in FIG. 3, before the hull 5 starts sailing, the control unit 13 initializes the first measurement unit 8 and the second measurement unit 10. Further, the previous navigation data already recorded in the transmission unit 15 is backed up and stored in, for example, a magneto-optical device (not shown), and the data in the transmission unit 15 is deleted.

At the start of navigation, the control unit 13
The trigger mode [Step 1] in which the danger state is continuously and automatically detected by the strain gauge 6, the first measuring unit 8 and the second measuring unit 10 sequentially, or the operator inputs his / her own operation by an external input. When the user feels it is necessary, the strain gauge 6, the first measuring unit 8, and the second measuring unit 10 sequentially select whether to set an external input mode in which a dangerous state is continuously and automatically detected. In this way, the detection of the dangerous state of the ship is started by any method.

Specifically, the strain gauge 6, the first measuring unit 8,
The second measuring unit 10 and the accelerometer 11 sequentially measure the amount of distortion of the hull 5 during navigation, the first distance ζ, the angle θ inclined from the still water surface 9 and the acceleration, respectively, and these data are sequentially transmitted to the arithmetic unit 12. Output [Step 2]. Then, at a known first vertical distance Z1 from the still water surface 9 to the bow 7 of the hull 5, the calculating unit 12 sets the second measuring unit 1
From the center of the hull 5 to the bow 7
The vertical movement distance Z2 obtained based on the distance L in the forward and backward directions is obtained by using a trigonometric function, the results are added, and the acceleration measured by the accelerometer 11 is integrated twice, and the hull 5 By calculating and adding the vertical movement amount Δh, a second distance Z at which the bow 7 of the sloping hull 5 is separated from the still water surface 9 is calculated.

Then, from the second distance Z, the first measuring unit 8
, That is, by subtracting the first distance ζ, the wave heights h (= Z−ζ) are sequentially calculated [Step 3]. The measured values and the calculation result data are sequentially stored in a storage unit built in the calculation unit 12 [Step 4]. Then, the control unit 13 constantly determines whether the measurement value from the strain gauge 6 or the calculation value of the second distance Z or the wave height h from the calculation unit 12 exceeds a set value [Step 5]. Alternatively, when at least one of the calculated values exceeds the set value even once, the control unit 13 controls the notifying device 14 to output a notification signal.

In this case, the lighting or blinking of the caution lamp 14a or the warning lamp 14b or the generation of a warning sound of the warning buzzer 14c is selected depending on how much the measured value or the calculated value exceeds the set value [Step 6]. ]. The control unit 13 performs this notification operation for a predetermined time (for example, several minutes), and performs measurement and calculation until an instruction to end the measurement [Step 7] is given by an external input.

Then, the captain (occupant) gives the attention lamp 14
a, or alarm lamp 14b and alarm buzzer 14c
It is determined whether or not to continue the navigation based on the notification. Thus, according to the embodiment of the present invention, the hull 5
A strain gauge 6 for detecting an amount of strain, a first measuring unit 8 for sequentially measuring a first distance の from a bow 7 of the hull 5 to a vertex 4 a of the wave 4, and a slope with respect to the still water surface 9. A second measuring unit 10 for sequentially measuring a second distance Z of the hull 5 to the bow 7 is provided, and an angle measured by an inclinometer that measures an angle θ at which the hull 5 inclines from the still water surface 9. The calculation unit 12 obtains a first vertical distance Z1 from the still water surface 9 to the bow 7 of the hull 5 and a vertical movement distance Z2 from the water surface 9 to the bow 7 based on Since the addition is performed, the motion of the hull 5 including the tilt amount and the vertical movement amount ΔZ of the hull 5 can be quantitatively known, and the arithmetic unit 12 sequentially subtracts the first distance か ら from the second distance Z to obtain the motion. The wave height h is calculated, and the control unit 12 calculates the measured value from the accelerometer 11 and the calculation unit 12. Alternatively, it is determined whether or not the calculated value exceeds the set value, and when at least one measured value exceeds the set value, the control is performed so as to output a notification signal to the notification device 14. For example, quantitative monitoring can be performed regardless of changes in sea conditions caused by human visual judgment or uncertain sea information, and dangerous conditions can be avoided quickly and safely even at night, and safe navigation can be performed. .

Since the value of the wave height h is sequentially calculated by subtracting the measured value of the first measuring unit 8, ie, the first distance か ら, from the measured value of the second measuring unit 10, ie, the second distance Z, the hull is calculated. Without the need for expensive wave height detectors
The ship can be safely navigated. In addition, since the measured values and the calculation result data are sequentially stored in the storage unit built in the calculation unit 12, detailed information during actual navigation can be accumulated, and this is used as future design data of the ship. Can be used.

Next, a second embodiment of the present invention will be described. In the above embodiment, the strain gauge 6 is provided, and the bow 7
Measurement unit 8 for sequentially measuring the first distance の from the wave 4 to the vertex 4 a of the wave 4, and the angle θ inclined from the still water surface 9.
Although the second measuring unit 10 is provided to measure the acceleration and the accelerometer 11 is provided at the center of gravity O of the hull 5, in the second embodiment of the present invention, the second measuring unit 10 is omitted and the accelerometer 11 is 7. In this manner, the acceleration associated with the vertical movement of the entire hull 5 is measured by the bow 7 and integrated by the calculation unit 12 to include the inclination amount of the hull 5 and the vertical movement amount ΔZ of the entire hull. It is possible to quantitatively know the motion of the hull 5 and obtain marine condition data for safely navigating the ship. The other configuration and operation and effect are the same as those of the first embodiment, and thus their description is omitted.

In each of the above-described embodiments, when at least one measured value or calculated value exceeds the set value even once, the control unit 13 controls to output a notification signal to the notification device 14. However, the present invention is not limited to this. For example, when the control device 13 outputs the notification operation, measurement is performed for a predetermined time (for example, one minute), and the average of the measured values or the calculated value exceeds the set value. In such a case, control may be performed to perform the notification operation. Or,
The notification operation may be performed based on the number of times the measured value exceeds the set value.

Further, in each of the above embodiments, the alarm 14 is provided with different types of alarms, that is, an alarm lamp 14a for calling attention, an alarm lamp 14b for issuing an alarm, and an alarm buzzer 14c. Although the example provided with is described above, the present invention is not limited to this, and a device that emits a voice for calling attention or warning may be used.

[0024]

As is apparent from the above description, according to the present invention, the distortion amount of the hull is detected by the distortion amount measuring device, and the first distance between the predetermined position of the hull and the top of the wave is measured by the measuring unit. The inclination angle detection unit detects the inclination angle of the hull that inclines with respect to the still water surface of a preset height, detects the acceleration when the hull moves up and down with an accelerometer arranged at the center of gravity of the hull, The arithmetic unit adds the calculated value obtained by integrating the acceleration from the accelerometer to the calculated value obtained by using a trigonometric function for the swing distance at which the predetermined position has swung from the still water surface based on the tilt angle signal. The second distance is obtained, and the wave height from the still water surface is calculated by subtracting the first distance from the second distance, and the measured value or the calculated value from at least one of the strain measuring device and the calculating unit is calculated. The control unit outputs a notification signal to the alarm when the specified value is exceeded. To so that control.

Alternatively, the amount of distortion of the hull is detected by a distortion amount measuring instrument, and a first distance between a predetermined position of the hull and the top of the wave is measured by a measuring unit, and the predetermined position of the hull (with the first distance measuring unit). (The same location), the acceleration of the hull moving up and down is detected by the accelerometer, and the calculation unit integrates the acceleration accompanying the swing of the specified position from the accelerometer, thereby moving the entire hull in the vertical direction Calculate the amount to determine the second distance, calculate the wave height from the still water surface by subtracting the first distance from the second distance,
When a measured value or a calculated value from at least one of the distortion measuring device and the calculation unit exceeds a predetermined value, a notification signal is output to a notification device. Quantitative monitoring can be performed irrespective of sea condition changes due to judgment and uncertain sea condition information, and even at night, safe navigation can be performed reliably and quickly, avoiding dangerous conditions.

Since the notifying device has a plurality of notifying portions for performing different types of notifying, and the control portion has a function of selecting the notifying portion in accordance with the measured value and outputting a notifying signal,
Different responses are possible depending on the case.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a notification device according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the movement of a hull.

FIG. 3 is a flowchart showing functions of a control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Notification device 2 Measuring device 3 Alarm issuing device 5 Hull 6 Strain gauge 7 Bow 8 First measuring unit 9 Still water surface 10 Second measuring unit 12 Computing unit 13 Control unit 14 Alarm unit 15 Transmitting unit h Wave height Z Second distance ζ First distance

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruhisa Ishihara 1-89, Minamikohoku, Suminoe-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Hitoshi Tobita 1-chome, Minamikohoku, Suminoe-ku, Osaka-shi, Osaka No. 7-89 F-term in Hitachi Zosen Corporation (reference) 2F051 AA01 AB09 AC01 AC07 BA01

Claims (3)

[Claims] 1. A strain amount measuring device for detecting a strain amount of a hull, a measuring unit for measuring a first distance between a predetermined position of the hull and a vertex of a wave, and a measuring unit having a predetermined height. An inclination angle detection unit attached to the hull to detect the inclination angle of the hull inclined with respect to the still water surface, and an accelerometer that is arranged at the position of the center of gravity of the hull and detects acceleration when the hull moves up and down An alarm that issues an alarm in response to sea conditions, and calculates the amount of vertical movement of the entire hull based on the sway amount of the hull based on the tilt angle signal from the tilt angle detection unit and the acceleration from the accelerometer. The arithmetic unit integrates the acceleration from the accelerometer into a calculated value obtained by using a trigonometric function of a swing distance at which the predetermined position has swung from the still water surface based on the tilt angle signal. The second distance is obtained by adding the calculated values It has a function to calculate and a function to calculate a wave height from a still water surface by subtracting the first distance from the second distance, or a measurement value from at least one of the strain measuring device and the calculation unit. A notifying device for a ship, comprising: a control unit having a function of outputting a notifying signal to the notifying device when the calculated value exceeds a predetermined value. 2. A distortion amount measuring device for detecting a distortion amount of a hull, a measuring unit for measuring a first distance between a predetermined position of the hull and a vertex of a wave, and a measuring unit disposed at a predetermined position of the hull. An accelerometer that detects acceleration when the hull moves up and down, and an alarm that issues a warning according to sea conditions are provided, and a calculation that calculates the amount of sway of the hull based on the acceleration signal from the accelerometer is provided. A calculating unit that calculates a vertical movement amount of the entire hull by integrating acceleration caused by swinging of a predetermined position from the accelerometer to obtain a second distance; and A function of calculating a wave height from a still water surface by subtracting the first distance from the second distance, wherein a measured value or a calculated value from at least one of the strain measuring device and the calculating unit is a predetermined value. If the value is exceeded,
A notification device for a ship, comprising: a control unit having a function of outputting a notification signal to the notification device. 3. The notifying device has a plurality of notifying units for performing different types of notifying, and the control unit has a function of selecting the notifying unit according to the measured value and outputting a notifying signal. The notification device for a ship according to claim 1 or 2, wherein