CN220583640U - Hull structure stress monitoring system - Google Patents

Abstract

The utility model relates to a ship structure stress monitoring system, which comprises an optical fiber grating strain gauge, an optical fiber grating thermometer, a protective cover shell, an optical cable, a plurality of line concentration boxes, an optical fiber terminal box, an optical fiber sensing analyzer and an analysis workstation, wherein the line concentration boxes are electrically connected with at least one optical fiber grating strain gauge and the optical fiber grating thermometer through the optical cable; the optical fiber terminal boxes are electrically connected with each line concentration box through a main optical cable; the optical fiber sensing analyzer is connected with the optical fiber terminal box through an optical cable; the analysis workstation is connected with the optical fiber sensing analyzer through a local area network; the protective cover shell is sleeved on the fiber grating strain gauge connected with the line concentration box and the grating thermometer. The ship structure stress monitoring system can monitor the ship structure stress in real time for a long time, evaluate the safety state of the ship structure according to the monitoring result, alarm dangerous stress, and timely deal with the ship structure stress according to the alarm by a shipman, so that the safety risk of the ship structure is effectively reduced.

Description

A hull structure stress monitoring system

Technical field

The utility model relates to the field of ship technology, in particular to a hull structure stress monitoring system.

Background technique

The safety of the hull structure is the cornerstone of ensuring the safety of ship operations. In order to improve the safety of ship structures, designers often use standard calculations, finite element verification, pool model tests, structural component loading tests and other methods to design the hull structure to ensure that the ship strength meets the load effects in actual wind and wave environments. There are also a few scholars who have installed strain sensors in the actual ship structure to study the structural stress changes during actual navigation.

However, the actual sailing wave environment is highly random, and designers cannot accurately evaluate the structural stress conditions under different sea conditions. For the sake of safety, the designs are conservative, with high safety redundancy and heavy hull weight. , causing certain economic losses to ship owners. Moreover, ships are gradually developing towards large-scale and specialization, and the hull structure is becoming more and more complex. Conventional methods cannot analyze its stress situation well. However, the current stress monitoring carried out by a few scholars is almost all experimental in nature, with few monitoring parts and short monitoring time. It is impossible to evaluate the structural strength in real time and provide timely safety warning information of the hull structure to the crew.

Contents of the invention

In view of this, it is necessary to provide a hull structural stress monitoring system to monitor the hull structural stress in real time over a long period of time, evaluate the installation status of the entire ship structure, and provide alarms for dangerous stresses.

A hull structure stress monitoring system, which includes a fiber Bragg grating strain gauge, a fiber Bragg grating thermometer, a protective cover, an optical cable, several junction boxes, an optical fiber terminal box, an optical fiber sensing analyzer and an analysis workstation, wherein:

The junction box is electrically connected to at least one fiber grating strain gauge and fiber grating thermometer through an optical cable;

The optical fiber terminal box is electrically connected to each of the junction boxes through a main optical cable;

The optical fiber sensing analyzer is electrically connected to the optical fiber terminal box through an optical cable;

The analysis workstation is connected to the optical fiber sensing analyzer through a local area network;

Therefore, the protective cover covers the fiber Bragg grating strain gauge and fiber Bragg grating thermometer connected to the junction box.

Further, a groove is provided on the protective cover, and the groove is used for fixing the multi-plex optical cable connected to the fiber Bragg grating strain gauge and the fiber Bragg grating thermometer.

Further, the analysis workstation includes a measuring point type detection device, an evaluation device, a timer and a display screen.

Further, the ship power battery overload alarm system also includes an alarm circuit, and the voice alarm is electrically connected to the analysis workstation.

Further, the alarm circuit includes a warning light alarm and a voice alarm.

Compared with the existing technology, the utility model has the following beneficial effects: in the hull structure stress monitoring system, by placing several fiber grating strain gauges and fiber grating thermometers at each measuring point of the port side cabin and starboard side cabin of the ship, long-term real-time Collect the stress deformation data and temperature data at each measuring point of the ship. The junction box combines the optical cables connecting the fiber Bragg grating strain gauges and fiber Bragg grating thermometers into a slightly thicker main optical cable. The stress deformation data and measurement data are collected through the main optical cable. The point temperature data is transmitted to the optical fiber terminal box. The optical fiber terminal box analyzes the stress deformation data and measuring point temperature data, and then transmits the analyzed stress deformation data and measuring point temperature data to the analysis workstation through the optical fiber sensing analyzer. The analysis workstation Evaluate the analyzed stress data. When the stress data is greater than the preset threshold, an alarm message is output. This enables long-term real-time monitoring of the stress of the hull structure. The safety status of the hull structure is evaluated based on the monitoring results, and dangerous stresses can be alarmed. , the crew can respond promptly according to the alarm, effectively reducing the safety risk of the ship structure.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of the present application. For some embodiments, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the hull structure stress monitoring system provided by the utility model;

Figure 2 is a schematic diagram of the sensor distribution in the hull structure stress monitoring system provided by the present utility model;

Figure 3 is a schematic structural diagram of the analysis workstation in the hull structure stress monitoring system provided by the utility model.

Detailed ways

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. The accompanying drawings constitute a part of this application and are used together with the embodiments of the present utility model to explain the principles of the present utility model, and are not related to the implementation of the present utility model. The examples together are used to illustrate the principle of the present invention and are not intended to limit the scope of the present invention.

Example 1

An embodiment of the present utility model provides a hull structural stress monitoring system. Referring to Figures 1 and 2 of the accompanying drawings, Figure 1 is a schematic structural diagram of the hull structural stress monitoring system provided by the present utility model. The hull structure stress monitoring system provided above includes junction boxes 10-15, optical cable 20, optical fiber terminal box 30, optical fiber sensing analyzer 40, and analysis workstation 50; among which:

The optical fiber terminal box 30 is connected to the junction box 10, the junction box 11, the junction box 12, the junction box 13, the junction box 14 and the junction box 15 through the optical cable 20; the junction box 10, The junction box 11 and the junction box 12 are distributed in the port side cabin of the ship, and the junction box 12, the junction box 13, the junction box 14 and the junction box 15 are distributed in the starboard side cabin of the ship;

The optical fiber sensing analyzer 40 is connected to the optical fiber terminal box 30 through the optical cable 20;

The analysis workstation 50 is connected to the optical fiber sensing analyzer 40 through a local area network;

Figure 2 is a distribution diagram of sensors connected to the junction box provided by the present utility model; the above distribution diagram includes fiber Bragg grating strain gauges 01-03, fiber Bragg grating thermometer 04, protective cover 05, junction box 11, and optical cable 20. in:

The fiber Bragg grating strain gauge 01 , fiber Bragg grating strain gauge 02 , fiber Bragg grating strain gauge 03 and fiber Bragg grating thermometer 04 are respectively connected to the junction box 11 through optical cables 20 .

The protective cover 05 is set on the fiber Bragg grating strain gauge 01, the fiber Bragg grating strain gauge 02, the fiber Bragg grating strain gauge 03 and the fiber Bragg grating thermometer 04.

In the present utility model, by placing several fiber Bragg grating strain gauges and fiber Bragg grating thermometers at each measuring point of the ship, the stress deformation data and temperature data of the measuring points at each measuring point of the ship are collected in real time for a long time. The junction box 10-15 will The optical cables connecting the fiber Bragg grating strain gauges 01-03 and the fiber Bragg grating thermometer 04 are merged into a slightly thicker main optical cable. The stress deformation data and measuring point temperature data are transmitted to the optical fiber terminal box 30 through the main optical cable 20. The optical fiber terminal box 30 will The stress deformation data and measuring point temperature data are analyzed, and then the analyzed stress deformation data and measuring point temperature data are transmitted to the analysis workstation 50 through the optical fiber sensing analyzer 40. The analysis workstation 50 evaluates the analyzed stress data. When When the stress data is greater than the preset threshold, alarm information is output, so that the stress of the hull structure can be monitored in real time for a long time, and the safety status of the hull structure can be evaluated based on the monitoring results. It can also alarm for dangerous stress, so that the crew can respond promptly according to the alarm, effectively Reduce ship structural safety risks.

Preferably, the protective cover is provided with a groove for fixing the multi-plex optical cable connected to the fiber Bragg grating strain gauge and the fiber Bragg grating thermometer.

Preferably, the analysis workstation 50 includes a measuring point type detection device 51 , an evaluation device 52 , a timer 53 and a display screen 54 .

Preferably, the hull structure stress monitoring system further includes an alarm circuit; the alarm circuit is electrically connected to the analysis workstation.

Preferably, the alarm circuit includes a warning light alarm and a voice alarm.

The application principle of the hull structure stress monitoring system provided by the present utility model will be explained below in conjunction with the specific process. Three fiber Bragg grating strain gauges and fiber Bragg grating thermometers are respectively installed at each preset monitoring point to collect the location of the preset monitoring point. The real-time temperature data of the position and the deformation amount of the hull structure are used as the hull structure deformation data; the collected hull structure deformation data and real-time temperature data are then transmitted to the optical fiber terminal box, and then transmitted to the optical fiber sensing analyzer by the optical fiber terminal box. The sensor analyzer analyzes the hull structure deformation data and real-time temperature data, and then transmits the data to the analysis workstation. The analysis workstation evaluates the analyzed stress data. When the stress data is greater than the preset threshold, an alarm message is output, so that the stress of the hull structure can be monitored in real time for a long time, and the safety status of the hull structure can be evaluated based on the monitoring results, and dangerous stress can be detected. By issuing an alarm, the crew can respond promptly according to the alarm, effectively reducing the ship's structural safety risks.

In the above application principle, the protective cover is set on the fiber Bragg grating strain gauge and fiber Bragg grating thermometer, and the optical cable connected to the fiber Bragg grating strain gauge and fiber Bragg grating thermometer is fixed through the groove on the protective cover, so that the ship can During the process of traveling, the sensors placed at each measuring point of the ship are protected from wind and waves, and at the same time, the accuracy of the stress deformation data and real-time temperature data acquired by the sensors is ensured.

As shown in FIG. 3 , the analysis workstation 50 includes a measuring point type detection device 51 , an evaluation device 52 , a timer 53 and a display screen 54 .

In the above application principle, the measuring point type detection device first performs preprocessing on the analyzed hull structure deformation data and real-time temperature data, and then preprocesses the analyzed hull structure deformation data and real-time temperature data. The above data preprocessing includes but is not limited to Filtering and removing singular values; because the preset measuring point types include local yield measuring points, longitudinal strength measuring points and fatigue measuring points. The timer setting presets the first time period, the second time period and the third time period. The analysis workstation preferably performs real-time structural strength assessment on the local yield measuring point and the longitudinal strength measuring point every 2 seconds and once every 30 minutes. Structural failure probability assessment, conduct cumulative damage assessment and remaining life assessment on fatigue measurement points every 5 minutes; evaluate the device and compare the real-time structural strength assessment results and structural failure probability assessment results with the corresponding preset thresholds to determine based on the comparison As a result, the structural safety status of the ship hull is early-warned, and the crew can respond promptly based on the above-mentioned early warning and the above-mentioned cumulative damage assessment results and remaining life assessment results, effectively reducing the ship's structural safety risks.

Furthermore, in the above application principle, the hull structure stress monitoring system also includes an alarm circuit. The alarm circuit includes a warning light alarm and a voice alarm. When the analysis workstation outputs alarm information, the alarm information is sent to the alarm through the LAN. circuit, and trigger the warning light alarm and voice alarm in the alarm circuit to prompt the crew to deal with the fault prompted by the alarm message in a timely manner.

Compared with the existing technology, the beneficial effects of this utility model are:

1) It can monitor the stress of the hull structure in real time for a long time, evaluate the safety status of the hull structure based on the monitoring results, and can alarm dangerous stresses. The crew can respond in time according to the alarm, effectively reducing the safety risks of the ship structure;

2) The system has high real-time performance and is convenient for monitoring and alarming.

The above are only preferred specific implementations of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person familiar with the technical field can easily imagine that within the technical scope disclosed by the present utility model, Any changes or replacements shall be covered by the protection scope of the present utility model.

Claims (5)

1. The utility model provides a hull structure stress monitoring system, this system contains fiber bragg grating strainometer, fiber bragg grating thermometer, protection housing, optical cable, a plurality of line concentration box, fiber optic terminal box, optical fiber sensing analysis appearance and analysis workstation, wherein:

the line concentration box is electrically connected with at least one fiber bragg grating strain gauge and a fiber bragg grating thermometer through optical cables;

the optical fiber terminal boxes are electrically connected with each line concentration box through a main optical cable;

the optical fiber sensing analyzer is electrically connected with the optical fiber terminal box through an optical cable;

the analysis workstation is connected with the optical fiber sensing analyzer through a local area network;

the protective cover shell is sleeved on the fiber grating strain gauge and the fiber grating thermometer which are connected with the line concentration box.

2. The hull structure stress monitoring system of claim 1, wherein said protective housing is provided with grooves for securing multiple optical fiber cables connected to said fiber grating strain gauge and said fiber grating thermometer.

3. The hull structure stress monitoring system of claim 1, wherein the analysis workstation comprises a station type detection device, an assessment device, a timer, and a display screen.

4. The hull structure stress monitoring system of claim 1, wherein said hull structure stress monitoring system further comprises an alarm circuit; the alarm circuit is electrically connected with the analysis workstation.

5. The hull structure stress monitoring system of claim 4, wherein said warning circuit includes a warning light alarm and a voice alarm.