JPS6361115A - Navigation recorder - Google Patents

Abstract

PURPOSE:To obtain a recorder capable of providing objective data useful in the inquiry of an accident, by displaying the states of other ship and a fixed obstacle with respect to a ship by its own radar signal and outputting an alarm signal when a dangerous degree of collision approaches and recording an image pickup signal with the output of said alarm signal. CONSTITUTION:CPU11 in ARPA (collision prevention aid apparatus) 10 calculates the CPA, DCPA and TCPA vectors and dangerous degree with other ship or a fixed obstacle. According to circumstances, a danger signal or a serous danger signal is successively outputted and an alarm circuit 12 performs necessary indication or the generation of alarm sound based on said signal and, in the case of the serous danger signal, a drive signal is outputted to a disk recorder 20. A pulse generating circuit 21 outputs positive and negative pulses to actuators 22, 31 based on the generation and extinction of said signal and, corresponding to this, the recording of a video signal and the image pickup of a display 13 by a video camera 33 are respectively performed. By this method, the decision and action of a captain and navigators in a collision accident can be analyzed based on recording.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a navigation recorder for recording the navigation progress of a ship.

[Prior art]

Conventional ships have not been proposed with a device that directly records the ship's maneuvering route and surrounding conditions, and are only equipped with a course recorder that records the ship's wake.

[Problems to be solved by this invention]

In addition, in the case of ships, while labor saving has progressed in recent years and the number of crew members is decreasing, on the other hand, ships have difficulty navigating in narrow waters such as the Tokyo Ditch and within ports, and collisions are a constant occurrence. Even in the trials of collision accidents, the judgment of the situation and ship maneuvering by the crew members of each ship is based on the crew's memories (there is a problem that it is difficult to objectively determine the situation based on testimony alone).

Furthermore, the course radar mentioned above is used to show the ship's track and compare it with the planned course, but it also shows the ship's track, and is used to compare it with the planned course. No connection with obstacles was found.

Therefore, the present invention aims to solve these problems.When a ship is at risk of collision, how the crew members make decisions and how they maneuver the ship, as well as the situation at that time. In other words, the purpose is to provide a navigation recorder that can reliably grasp and record relationships with other ships and fixed obstacles, and provide objective data useful for accident judgment.

[Structure of the invention]

The navigation recorder according to the present invention displays images of the situation of other ships and fixed obstacles relative to one's own ship based on radar signals, and also performs collision detection and outputs an alarm signal when the risk of collision is imminent. An assistance device, an imaging device that captures the video display of this collision prevention assistance device and outputs an imaging signal, and when an alarm signal is output from the collision prevention assistance device, this is input and images are captured for that period. The device is characterized in that it includes a recording device that records the imaging signal from the device.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to illustrated embodiments.

Figure 1 shows an overall system diagram of an embodiment of the navigation recorder.

This navigation recorder is an ARPA (Collision Prevention Assistance System) IO,
It consists of a disk recorder 20 and a video camera I.

A RP A 10 is CPU 11, alarm circuit 1
2 and a display 13, in which the CPU
Reference numeral 11 calculates CPA, DCPA, TCPA vectors, collision determination, etc. with other ships and fixed obstacles based on radar signals input from the outside, and outputs a danger level signal according to the danger level. Further, the CPU 11 synthesizes registered data such as radar signals and nautical charts, and outputs a video signal that takes into account data such as the situation of the own ship, other ships, fixed obstacles, route, display of danger level, etc.

The image II from the CPU II is output and displayed on the display 13, and the danger level signal is input to the alarm circuit 12, where the dangerous state is displayed with an alarm lamp, an alarm buzzer, etc. There are two types of danger signals outputted from the CPU 11: a preventive warning danger signal and a critical danger signal. When the alarm circuit 12 receives the above-mentioned serious danger signal, it displays the serious danger state with an alarm lamp, an alarm buzzer, etc., and outputs a drive signal to the disk recorder.

The disk recorder is equipped with a pulse generation circuit 21, to which a drive signal from the alarm circuit 12 is input. The pulse generating circuit 21 outputs a positive pulse when a drive signal is input, and outputs a negative pulse for recovery when the input drive signal is interrupted.

In this way, the positive pulses and negative pulses outputted from the pulse generating circuit 2 are outputted to the actuator B and the actuator 31 of the video camera (9), which will be described in detail later.

The spring return switch O of the disk recorder 24 is connected to the actuator O, and when a positive pulse is input, the actuator N applies a driving force to the spring return switch O to operate the disk recorder 24. Furthermore, when a negative pulse is input to actuator B, spring return switch n is driven in the return direction,
Disk recorder 2.1 is stopped.

The disk recorder 24 is started and stopped by the activation and return of the spring return switch B, and records digital signals from the video camera, which will be described later.

A counter 5 is connected to the disk recorder 24, and counts up the operating time of the disk recorder 24. Furthermore, the counter 5 is equipped with an alarm time setting dial 26 for setting the rated time of the recording medium (disk) and an alarm clock, and the disk recorder 24 is activated intermittently every time the aforementioned serious danger signal is input. When the accumulated operating time approaches the rated time of the recording medium set by the alarm time setting dial 26, the alarm is activated and a caution signal is output.

Furthermore, a video camera 33 is provided between the video cameras and is positioned so as to be able to photograph the ARPALO display 13. An actuator 31 is connected to a spring return lever 32 for starting and stopping the video camera 33, and the video camera 33 is started and stopped by positive and negative pulses from the pulse generating circuit 21. The video camera I is also provided with an A/D converter 34, which A/D converts the analog signal from the video camera 33 into a digital signal and outputs it to the disk recorder 24.

The navigation recorder composed of the above blocks is shown in Figure 2 (a).
, As shown in the plan view and side view in (b), A
A video camera I is installed above the RP p.
It is provided in the PAIO console.

This navigation recorder is a CPU in ARP A10.
11: CP with other ships and fixed obstacles based on radar signals
A, DCPA, TCPA vector, risk level, etc. are calculated. As a result, if a target with a high collision risk occurs, a danger signal or a serious danger signal is sequentially output to the alarm circuit 12.

The alarm circuit 12 performs necessary display and generation of an alarm sound based on the danger signal and the serious danger signal from the CPU 11, and at the same time outputs a drive signal to the disk recorder in the case of a serious danger signal.

When the drive signal from the alarm circuit 2 of the disk recorder is input, the pulse generating circuit 21 outputs a positive pulse to the actuators n and 31. Further, when the drive signal from the alarm circuit 12 disappears, the pulse generation circuit 21 outputs a negative pulse to the actuators n and 31.

The actuator n operates the spring return switch n when a positive pulse is input from the pulse generation circuit 21, and returns the spring return switch n when a negative pulse is input. When the spring return switch n is pressed, the disk recorder array operates and starts recording video signals, and when the spring return switch n is returned, the disk recorders stop recording video digital signals.

The counter 5 totals the operating time of the disk recorder row, and the alarm time setting dial 26 adds up the operating time of the disk recorder row.
4. Manually set an arbitrary alarm time according to the usable time of the recording medium used. For this reason, the alarm clock displays an alarm and generates a sound based on a signal manually input from the counter 5 at the time set by the alarm time setting dial 26.

On the other hand, when a positive pulse is input from the disk recorder force pulse generation circuit 2 between the video cameras, the actuator 31 operates the spring return lever 32.
When a negative pulse is input, the spring return lever 32
to be reinstated.

When the spring return lever 32 is actuated, the video camera 33 starts and the ARPAlo display 13 starts.
A video is taken, and when the spring return lever 32 returns, the photographing is stopped.

In this way, the video camera 33 is installed directly above the ARPAIO, and during operation, it takes an image of the display 13, converts the video signal into a digital signal by the A/D converter 34, and outputs it to the disk recorder. Note that the video camera 33 takes pictures at predetermined time intervals using a built-in timer.

If this recorder is used, not only the judgment and maneuvering in serious danger situations but also the relationship with other ships and fixed obstacles will be automatically recorded, so if the judgment or maneuvering is wrong and a collision occurs, it will be automatically recorded. In the event of a collision, the judgment and actions of the captain or officer can be reproduced and analyzed from the record, and even in a collision accident trial, the relationship between each ship and fixed obstacles and the situation of the crew can be objectively analyzed. It can be confirmed.

In addition, since the disk recorder operates only when a serious danger condition occurs based on the ARPA signal, the capacity of the recording medium is small, and a counter warns the rated time of the recording medium in advance, so the recording medium can be replaced in advance. can be done.

Furthermore, this recorder can be easily installed into existing ARPAs.

〔Effect of the invention〕

The embodiments of the navigation recorder according to the present invention are as described above, and the following effects can be achieved.

When a ship is in danger of collision, it is necessary to accurately understand and record how the crew members made decisions and maneuvered the ship, as well as the situation at the time, including the relationship with other ships and fixed obstacles. It will serve as a navigation recorder that can provide objective data that is useful for accident trials, etc.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention.
a) and (b) are a plan view and a side view showing the mounting state. 10...ARPA (Collision Prevention Assistance System), Canada/
・・Disk recorder, 11・・・・CPU, 12・
...Alarm circuit, 13...Display, 21...Pulse generation circuit, η...
Actuator, wing... Spree y f IJ turn switch, Sae... Disc recorder, 5.
...Counter, 26...Alarm time setting dial, r...Alarm, addition...
Video camera, 31...actuator, 32
...Spring return lever, 33...
...Video camera, 34...A/D converter.

Claims (1)

[Claims] Collision prevention assistance that displays images of the situation of other ships and fixed obstacles relative to one's own ship based on radar signals, and also performs collision judgment and outputs an alarm signal when the risk of collision is imminent. an imaging device that captures the video display of the collision prevention assistance device and outputs an imaging signal; when an alarm signal is output from the collision prevention assistance device, the alarm signal is input and the imaging device is configured to perform the imaging for that period; A navigation recorder comprising a recording device that records an imaging signal from the device.