A wearable device, system and method for automatic alerting of a ship personnel falling overboard

Abstract

The application discloses a wearable device, system and method for automatic alarm of ship personnel falling into water, wherein an acceleration sensor, a timer, a positioning module, a wireless communication module and a controller are arranged on the wearable body; the controller first acquires the direction-down weightlessness acceleration measured by the acceleration sensor and the weightlessness time measured by the timer, analyzes whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time, acquires the direction-down acceleration change value when both are yes, analyzes whether the acceleration change value is greater than the set acceleration change value, analyzes whether the maximum acceleration decays with a time coefficient during the period from the maximum acceleration to zero acceleration and whether the required time is not more than the set time when the acceleration change value is yes, sends the automatic alarm information of the ship personnel falling into water containing the ship personnel identity information and the current position information positioned by the positioning module through the wireless communication module when both are yes, and ends the detection when any of the above conditions is not met.

Description

Technical Field

[0001] This invention relates to the field of automatic alarm technology for people falling into the water, and in particular to a wearable device, system and method for automatic alarm of personnel falling into the water on ships. Background Technology

[0002] When large vessels are sailing or operating at sea, the dispersed personnel across different locations make it difficult to manage situations where personnel fall overboard. In the event of a person falling overboard, the vessel needs to be notified immediately and organize a rescue operation to avoid endangering the lives of those on board due to delayed notification.

[0003] Existing automatic water alarm systems have low accuracy, frequently resulting in false alarms or failure to report when they should, significantly hindering rescue efforts. Therefore, a system with high accuracy in water alarms is crucial for successful rescue operations.

[0004] An existing invention patent with application number CN202410114751X, entitled "A Method and System for Detecting Falling into Water," utilizes triaxial acceleration and triaxial angular velocity data to determine whether a person has fallen into the water. The triaxial acceleration data, representing the motion trajectory, forms the basis for determining the fall state, while the triaxial angular velocity data, representing the motion posture, verifies the fall state. The two work together to provide an accurate and reliable determination of the fall state. However, when using triaxial acceleration data to determine the fall state, it sequentially performs free fall, impact, and stationary state assessments. The inventors of this invention believe that this existing patent does not accurately determine the motion trajectory of a person falling into the water. Based on this, this invention designs a more accurate wearable device, system, and method for automatic alarm of personnel falling into the water from ships. Summary of the Invention

[0005] This invention addresses the problems and shortcomings of existing technologies by providing a wearable device, system, and method for automatic alarm of personnel falling into the water on ships.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This invention provides a wearable device for automatic alarm of personnel falling into the water on ships, characterized in that it includes a wearable body, on which an acceleration sensor, a timer, a positioning module, a wireless communication module and a controller are provided;

[0008] The controller is used to first acquire the downward weightlessness acceleration detected by the accelerometer and the weightlessness time detected by the timer, analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time. If both are yes, it acquires the downward acceleration change value and analyzes whether the acceleration change value is greater than the set acceleration change value. If yes, it analyzes whether the period from the maximum acceleration detected by the accelerometer to zero acceleration decays with a time coefficient and whether the required time does not exceed a set time. If yes, it sends an automatic alarm message for ship personnel falling into the water, containing the ship's personnel identity information and the current location information located by the positioning module, to the ship server through the wireless communication module. If any of the above conditions are not met, the detection ends.

[0009] Preferably, the wearable body is also equipped with a barometric pressure sensor; the controller is used to first acquire the downward weightlessness acceleration detected by the accelerometer, the weightlessness time detected by the timer, and the barometric pressure value detected by the barometric pressure sensor, analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time, and whether the weightlessness height calculated based on the barometric pressure value is greater than the set height, and if all of the above are true, then acquire the downward acceleration change value.

[0010] Preferably, the wearable body is further provided with a heart rate sensor or a pulse sensor; the controller is used to first acquire the downward weightlessness acceleration detected by the accelerometer, the weightlessness time detected by the timer, the air pressure value detected by the barometer, and the heart rate value detected by the heart rate sensor or the pulse value detected by the pulse sensor, and analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time, whether the weightlessness height calculated based on the air pressure value is greater than the set height, and whether the heart rate variability calculated based on the heart rate value corresponding to the weightlessness stage is within the set heart rate range or whether the pulse fluctuation value calculated based on the pulse value corresponding to the weightlessness stage is within the set pulse fluctuation range. If all of these are true, then the downward acceleration change value is acquired.

[0011] The present invention also provides an automatic alarm system for personnel falling into the water on ships, characterized in that it includes the aforementioned wearable device and ship server.

[0012] This invention also provides an automatic alarm method for personnel falling into the water on ships, characterized in that it utilizes the aforementioned automatic alarm system for personnel falling into the water on ships, and the method includes the following steps:

[0013] S1. The controller acquires the downward weightlessness acceleration detected by the accelerometer and the weightlessness time detected by the timer, analyzes whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time. If so, proceed to step S2; otherwise, repeat step S1.

[0014] S2. The controller acquires the downward acceleration change value and analyzes whether the acceleration change value is greater than the set acceleration change value. If it is, proceed to step S3; otherwise, repeat step S1.

[0015] S3. The controller analyzes whether the maximum acceleration detected by the accelerometer decays with a time coefficient from the time the acceleration becomes zero and whether the time required does not exceed a set time. If so, proceed to step S4; otherwise, repeat step S1.

[0016] S4. The controller sends an automatic alarm message containing the ship's personnel identity information and the current location information located by the positioning module to the ship server via the wireless communication module.

[0017] The positive and progressive effects of this invention are as follows:

[0018] This invention detects acceleration and time data, enabling a better and more accurate simulation of the trajectory of personnel falling into the water from a ship—experiencing weightlessness, impact, and undulation phases. This allows for more precise analysis of personnel falling into the water, reducing the probability of false alarms and improving the accuracy of automatic alarms. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of a wearable device for automatic alarm of personnel falling into the water on ships, according to a preferred embodiment of the present invention.

[0020] Figure 2 This is a flowchart of an automatic alarm method for ship personnel falling into the water, according to a preferred embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1As shown, this embodiment provides a wearable device for automatic alarm of personnel falling into the water on ships. It includes a wearable body 100, which is equipped with an accelerometer 101, a timer 102, a positioning module 103, a wireless communication module 104, and a controller 105. The wearable body 100 can be a smartwatch, a smart vest, or similar device.

[0023] The controller 105 first acquires the downward weightlessness acceleration detected by the accelerometer 101 and the weightlessness time detected by the timer 102. It then preprocesses the data using a third-order moving average filter, analyzing whether the weightlessness acceleration is within a set weightlessness acceleration range and whether the weightlessness time is greater than a set weightlessness time. If both are yes, it acquires the downward acceleration change value and analyzes whether the acceleration change value is greater than a set acceleration change value. If yes, it further analyzes whether the period from the maximum acceleration detected by the accelerometer to zero acceleration decays with a time coefficient and whether the required time does not exceed a set time. At this time, the automatic alarm information for ship personnel falling into the water is sent to the ship server 200 through the wireless communication module 104. The automatic alarm information for ship personnel falling into the water includes the ship personnel's identity information and the current location information located by the positioning module 103. If any of the above conditions are not met (i.e., the weightlessness acceleration is not within the set weightlessness acceleration range, the weightlessness time is not greater than the set weightlessness time, the acceleration change value is not greater than the set acceleration change value, the maximum acceleration does not decay with a time coefficient during the period from the acceleration to zero, or the time required for the maximum acceleration to zero exceeds the set time), the current test ends and the next test is carried out.

[0024] In this embodiment, motion trajectories in three stages were detected:

[0025] Weightlessness phase (downward direction): Acquire the downward weightlessness acceleration detected by the acceleration sensor 101 and the weightlessness time detected by the timer 102, analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time. When both conditions are met, it indicates that the ship's personnel have experienced weightlessness.

[0026] Impact phase (upward direction): Obtain the downward acceleration change value and analyze whether the acceleration change value is greater than the set acceleration change value. When this condition is met, it indicates that the ship's personnel have experienced an impact.

[0027] Fluctuation phase (alternating directional oscillations): Analyze whether the maximum acceleration detected by the accelerometer decays with a time coefficient from the time the acceleration reaches zero, and whether the time required does not exceed a set time. When both conditions are met, it indicates that the ship's crew has experienced fluctuations.

[0028] After the detection and analysis show that the ship's personnel have successively experienced the weightlessness stage, the impact stage, and the undulation stage, it indicates that the ship's personnel have fallen into the water, and an automatic alarm for ship personnel falling into the water is triggered.

[0029] In a further optimized manner, the wearable body 100 is also equipped with a barometric pressure sensor 106; the controller 105 is used to first acquire the downward weightlessness acceleration detected by the accelerometer 101, the weightlessness time detected by the timer 102, and the barometric pressure value detected by the barometric pressure sensor 106, analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether its weightlessness time is greater than the set weightlessness time, and whether the weightlessness height calculated based on the barometric pressure value is greater than the set height, and if all of these are true, then the downward acceleration change value is acquired.

[0030] In this embodiment, multi-sensor data fusion judgment is implemented, with acceleration data as the main component and air pressure data as the auxiliary component, to further improve the detection accuracy of personnel falling into the water from ships.

[0031] Furthermore, the wearable device 100 is also equipped with a heart rate sensor or a pulse sensor 107; the controller 105 is used to first acquire the downward weightlessness acceleration detected by the acceleration sensor 101, the weightlessness time detected by the timer 102, the air pressure value detected by the air pressure sensor 106, and the heart rate value detected by the heart rate sensor or the pulse value detected by the pulse sensor, and analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time, whether the weightlessness height calculated based on the air pressure value is greater than the set height, and whether the heart rate variability calculated based on the heart rate value corresponding to the weightlessness stage is within the set heart rate range or whether the pulse fluctuation value calculated based on the pulse value corresponding to the weightlessness stage is within the set pulse fluctuation range. If all of these are true, then the downward acceleration change value is acquired.

[0032] In this embodiment, multi-sensor data fusion judgment is implemented, with acceleration data as the main component and air pressure data and heart rate / pulse data as supplementary components, to further improve the detection accuracy of personnel falling into the water from ships.

[0033] This embodiment also provides an automatic alarm system for personnel falling into the water on ships, which includes the aforementioned wearable device and ship server.

[0034] like Figure 2 As shown, this embodiment also provides an automatic alarm method for ship personnel falling into the water, which is implemented using the above-mentioned automatic alarm system for ship personnel falling into the water. The automatic alarm method for ship personnel falling into the water includes the following steps:

[0035] Step 101: The controller acquires the downward weightlessness acceleration detected by the accelerometer and the weightlessness time detected by the timer, analyzes whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time. If so, proceed to step 102; otherwise, repeat step 101.

[0036] Step 102: The controller acquires the downward acceleration change value and analyzes whether the acceleration change value is greater than the set acceleration change value. If so, proceed to step 103; otherwise, repeat step 101.

[0037] Step 103: The controller analyzes whether the maximum acceleration detected by the accelerometer decays with a time coefficient from the time the acceleration becomes zero, and whether the time required does not exceed a set time. If yes, proceed to step 104; otherwise, repeat step 101.

[0038] Step 104: The controller sends an automatic alarm message containing the ship's personnel identification information and the current location information located by the positioning module to the ship server via the wireless communication module.

[0039] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A wearable device for automatic alarm of personnel falling into the water on a ship, characterized in that, It includes a wearable body, which is equipped with an accelerometer, a timer, a positioning module, a wireless communication module and a controller; The controller is used to first acquire the downward weightlessness acceleration detected by the accelerometer and the weightlessness time detected by the timer, analyze whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time. If both are yes, it acquires the downward acceleration change value and analyzes whether the acceleration change value is greater than the set acceleration change value. If yes, it analyzes whether the period from the maximum acceleration detected by the accelerometer to zero acceleration decays with a time coefficient and whether the required time does not exceed a set time. If yes, it sends an automatic alarm message for ship personnel falling into the water, containing the ship's personnel identity information and the current location information located by the positioning module, to the ship server through the wireless communication module. If any of the above conditions are not met, the detection ends.

2. The wearable device for automatic alarm of personnel falling into the water on ships as described in claim 1, characterized in that, The wearable device is also equipped with a barometric pressure sensor; The controller is used to first acquire the downward weightlessness acceleration detected by the accelerometer, the weightlessness time detected by the timer, and the air pressure value detected by the barometer. It then analyzes whether the weightlessness acceleration is within the set weightlessness acceleration range, whether the weightlessness time is greater than the set weightlessness time, and whether the weightlessness height calculated based on the air pressure value is greater than the set height. If all of these conditions are met, the controller then acquires the downward acceleration change value.

3. The wearable device for automatic alarm of personnel falling into the water on a ship as described in claim 2, characterized in that, The wearable device is also equipped with a heart rate sensor or a pulse sensor; The controller is used to first acquire the downward weightlessness acceleration detected by the accelerometer, the weightlessness time detected by the timer, the air pressure value detected by the barometer, and the heart rate value detected by the heart rate sensor or the pulse value detected by the pulse sensor. It analyzes whether the weightlessness acceleration is within the set weightlessness acceleration range, whether the weightlessness time is greater than the set weightlessness time, whether the weightlessness height calculated based on the air pressure value is greater than the set height, and whether the heart rate variability calculated based on the heart rate value corresponding to the weightlessness stage is within the set heart rate range or whether the pulse fluctuation value calculated based on the pulse value corresponding to the weightlessness stage is within the set pulse fluctuation range. If all of these are true, the controller then acquires the downward acceleration change value.

4. The wearable device for automatic alarm of personnel falling into the water on a ship as described in claim 1, characterized in that, The controller is used to preprocess the acceleration data detected by the accelerometer before analysis.

5. The wearable device for automatic alarm of personnel falling into the water on a ship as described in claim 4, characterized in that, The controller is used to preprocess the acceleration data detected by the accelerometer using a third-order moving average filter before analysis.

6. The wearable device for automatic alarm of personnel falling into the water on a ship as described in claim 1, characterized in that, The wearable device is a smartwatch.

7. An automatic alarm system for personnel falling overboard from a ship, characterized in that, It includes the wearable device and ship server as described in any one of claims 1-6.

8. An automatic alarm method for personnel falling overboard from a ship, characterized in that, It is implemented using the automatic alarm system for ship personnel falling into the water as described in claim 7, and the automatic alarm method for ship personnel falling into the water includes the following steps: S1. The controller acquires the downward weightlessness acceleration detected by the accelerometer and the weightlessness time detected by the timer, analyzes whether the weightlessness acceleration is within the set weightlessness acceleration range and whether the weightlessness time is greater than the set weightlessness time. If so, proceed to step S2; otherwise, repeat step S1. S2. The controller acquires the downward acceleration change value and analyzes whether the acceleration change value is greater than the set acceleration change value. If it is, proceed to step S3; otherwise, repeat step S1. S3. The controller analyzes whether the maximum acceleration detected by the accelerometer decays with a time coefficient from the time the acceleration becomes zero and whether the time required does not exceed a set time. If so, proceed to step S4; otherwise, repeat step S1. S4. The controller sends an automatic alarm message containing the ship's personnel identity information and the current location information located by the positioning module to the ship server via the wireless communication module.

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