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DISPLAY
Model
-
Series
HULL STRESS MONITORING SYSTEM
Product Description

DISPLAY


General Status

This is the most general display and is primarily used as an overview of the system. The outputs from the sensors (4 strain gauges, and an accelerometer) are displayed by the bar graph representing maximum and minimum values over previous 1 minute. The mean, maximum and minimum values of gauge signals are displayed as the percentage values with respect to the prescribed criteria values. In addition, the current date, time and global position are displayed by text. Ship's speed, heading and shaft speed are displayed in the form of clock gauge.



Bending Moment

This display shows maximum values of the vertical bending moments for both sea and harbour operating conditions as the percentage values with respect to the prescribed critical values.

The screen shows the bending moment trend over last 4 hours with the updated data every 5 minutes in the form of bar graph. Displayed time interval can be changed from 1 to 4 hours by selecting the option button. There are two kinds of display modes of bending moment, those are, SEA and HARBOUR modes.





Slamming

The Slam Warning is to warn the vessels operating personnel in advance that the vessel is in sea state or operating conditions approaching those that could have wave slams that could lead to either local or hull girder structural damage. Slam warning monitors are to show the trend over time in relation to the slam wave impact that would exceed the selected warning levels.




Real-time Display

The outputs from each sensor over the last 60 seconds are displayed on the two graphs when the button is clicked. The typical display is shown below. Items to be displayed on the two graphs are selected by clicking the gauge selection button. Because two kinds of signal are displayed at once, user can compare one signal with another.




Statistics

It displays the results of statistical analysis performed on the data measured from all sensors during the last 5 and 30 minutes by selecting the toggle button in the upper right side in the figures. As the statistical results, the following values are obtained and stored automatically on the computer hard disk for analysis ashore.

- Maximum +ve and -ve values
- Mean value
- Maximum peak-to-peak values
- Standard deviation
- Root Mean Square values
- Average zero crossing period


Fatigue Display

This display shows the cumulative stress cycle counts in the whole life of the ship and the fatigue cycle from a S-N curve in ABS rule. In this program the S-N curve is selected for F case to describe the longitudinal bulkhead and the deck plate at the long based strain gauges



Logger Entry

The Logger Entry display is designed to acquire a manual entry log of critical data extracted from the ship's written log book. The related data from the ship's log are recorded in the computer storage disk for analysis ashore. The manual entry data are recorded in the computer when the SAVE button is pressed after completion of manual key-in.



Alarm

The Logger Entry display is designed to acquire a manual entry log of critical data extracted from the ship's written log book.
The related data from the ship's log are recorded in the computer storage disk for analysis ashore.
The manual entry data are recorded in the computer when the SAVE button is pressed after completion of manual key-in.


Replay

The logged data in the system computer during a voyage can be replayed by the software program called HSMS-viewer.
This takes a similar form to the real time graph described above. HSMS-viewer software can be loaded on any IBM compatible
PC with a suitable specification and can be run by loading the logged data from a ship via floppy disk or CD.






Product List
HULL STRESS MONITORING SYSTEM
SHAFT TORQUE METER & SHIP PERFORMANCE MONITORING SYSTEM