CN115973373A

CN115973373A - Emergency rescue method and equipment for marine distress

Info

Publication number: CN115973373A
Application number: CN202310139842.4A
Authority: CN
Inventors: 孔洁; 刘真汉; 郭津玮; 陶嘉裕; 周磊
Original assignee: Zhejiang Zhongyu Communication Co ltd
Current assignee: Zhejiang Zhongyu Communication Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-04-18
Anticipated expiration: 2043-02-08
Also published as: CN115973373B

Abstract

The embodiment of the specification discloses an emergency rescue method for marine distress, which comprises the following steps: the personal positioning terminal is triggered by linkage of a plurality of built-in sensor switches to start a working state, acquires drowning information of a user based on a built-in positioning module and acquisition equipment, determines an alarm instruction according to the positioning information and basic information of the personal positioning terminal, sends the alarm instruction and image information to shipborne Beidou terminal equipment of a mother ship through a built-in wireless communication module, and determines a rescue mode of the user based on response of the shipborne Beidou terminal equipment; if the self-rescue mode is determined, the shipborne Beidou terminal equipment of the mother ship receives the alarm instruction and the image information, analyzes and alarms; if the rescue mode is determined, the alarm instruction and the image information are transmitted to an emergency rescue management center through a built-in RD communication module and a Beidou communication system in the marine distress emergency system so as to inform ships within a preset range to rescue people falling into water.

Description

Emergency rescue method and equipment for marine distress

Technical Field

The specification relates to the technical field of communication, in particular to an emergency rescue method and equipment for marine distress.

Background

With the rapid development of marine fishing, marine transportation and marine trade, the number of people working at sea is increasing. Due to the complex and changeable marine environment, various emergencies such as: personnel falling accidents caused by reef touch, collision and sinking, and the like. When a maritime worker wears the conventional life jacket to fall into water, the conventional life jacket lacks a positioning and position reporting device, so that the rescue plane or the ship is difficult to find the position of the person in danger, the person in danger often misses a gold rescue period of 72 hours, and the problem of damaging the life and property of the person is caused. Therefore, how to quickly position the maritime personnel to improve the search and rescue efficiency becomes an urgent problem.

The marine distress call devices used in the prior art are mainly classified into two categories: the device is a maritime distress call device which is positioned through a Global Navigation Satellite System (GNSS) and based on short-distance radio communication, and the device is a maritime distress call device which is positioned through the GNSS and based on Satellite System communication. However, the sea range is wide, and the communication distance of the distress mode based on short-distance radio communication is limited after ships are in danger or people fall into water, so that the distress mode can only cover a few seas to dozens of seas around the ship. When the distance between a ship with corresponding receiving equipment at the periphery and a shore base station is long, the alarm information is often not received and rescue is missed. The maritime rescue modes based on satellite system communication are all ship-borne terminal equipment, personal equipment is lacked, and the difficulty of search and rescue can be increased when people falling into water lose contact.

Therefore, an emergency rescue method for maritime distress with wide coverage and high search and rescue efficiency is needed.

Disclosure of Invention

One or more embodiments of the present disclosure provide an emergency rescue method and device for marine distress, which are used to solve the following technical problems: how to provide an emergency rescue method for maritime distress with wide coverage range and high search and rescue efficiency.

One or more embodiments of the present disclosure adopt the following technical solutions:

one or more embodiments of the present specification provide an emergency rescue method for a marine distress, which is applied to a marine distress emergency system composed of a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center, and a Beidou communication system, and the method includes:

the personal positioning terminal is triggered by linkage of a plurality of built-in sensor switches to start a working state, and acquires drowning information of a person falling into the water based on a built-in positioning module and acquisition equipment of the personal positioning terminal; wherein the overboard information comprises: positioning information and image information;

the personal positioning terminal determines an alarm instruction according to the positioning information and the basic information of the personal positioning terminal; wherein the basic information includes: device type, device number, user information;

the personal positioning terminal sends the alarm instruction and the image information to shipborne Beidou terminal equipment of a mother ship through a built-in wireless communication module of the personal positioning terminal so as to determine a rescue mode of people falling into water based on the response of the shipborne Beidou terminal equipment; wherein the rescue mode is a self-rescue mode and a rescue mode;

if the rescue mode is determined to be the self-rescue mode, the shipborne Beidou terminal equipment of the mother ship receives the alarm instruction and the image information, analyzes and alarms;

if the rescue mode is determined to be the rescue mode, the personal positioning terminal transmits the alarm command and the image information to the emergency rescue management center through a built-in RD communication module and a Beidou communication system in the marine distress emergency system;

the emergency rescue management center acquires the shipborne Beidou terminal equipment within a preset range based on the position information in the alarm instruction, and sends the position information and the image information to the shipborne Beidou terminal equipment within the preset range through the Beidou communication system, so that ships where the shipborne Beidou terminal equipment is located within the preset range rescue people falling into water.

Further, in one or more embodiments of this specification, the operation state is turned on by the personal positioning terminal according to linkage triggering of a plurality of built-in sensor switches, and specifically includes:

the method comprises the steps that the personal positioning terminal obtains a current conductance value through a built-in first sensor, and if the first sensor determines that the current conductance value is larger than a preset conductance threshold value, the first sensor triggers a corresponding first sensor switch;

a second sensor is arranged in the personal positioning terminal to obtain a current water pressure value, and if the current water pressure value is larger than a preset water pressure threshold value, the second sensor triggers a corresponding second sensor switch;

and if the personal positioning terminal determines that the corresponding first sensor switch and the corresponding second sensor switch are both triggered, the personal positioning terminal starts a working state.

Further, in one or more embodiments of the present specification, the acquiring of the drowning information of the drowning person based on the positioning module and the collection device built in the positioning module specifically includes:

the personal positioning terminal acquires image information of the person falling into the water according to built-in acquisition equipment;

the personal positioning terminal determines whether RN cold start positioning of the RN positioning module is successful according to a feedback statement of a built-in RN positioning module;

if so, resolving a Beidou satellite positioning signal received by a Beidou positioning communication antenna in the personal positioning terminal based on a built-in RN positioning module of the personal positioning terminal to obtain positioning information of the personal positioning terminal;

if not, the personal positioning terminal obtains positioning information of the personal positioning terminal based on a built-in Beidou RD communication module and the Beidou communication system;

and the personal positioning terminal takes the image information and the positioning information as drowning information of the person falling into the drowning water.

Further, in one or more embodiments of the present specification, the obtaining, by the personal positioning terminal, the positioning information of the personal positioning terminal based on a built-in beidou RD communication module and the beidou communication system specifically includes:

the personal positioning terminal sends a positioning request to a Beidou satellite in the Beidou communication system through a built-in Beidou RD communication module; the positioning request is a double-satellite active positioning request;

the Beidou satellite sends the positioning request to a ground central station in the Beidou communication system;

the ground central station acquires elevation data of the ground and position data of the Beidou satellite based on the positioning request;

and the ground central station carries out three-ball interactive calculation according to the elevation data, the position of the ground central station and the position of the Beidou satellite to obtain the positioning information of the personal positioning terminal, and sends the positioning information to the personal positioning terminal based on the Beidou satellite.

Further, in one or more embodiments of the present specification, the personal positioning terminal sends the alarm instruction and the image information to a ship-borne beidou terminal device of a mother ship through a preset wireless communication module, so as to determine a rescue mode of a person falling into water based on a response of the ship-borne beidou terminal device, and specifically includes:

the personal positioning terminal sends the positioning information to shipborne Beidou terminal equipment of a mother ship through a preset wireless communication module;

the shipborne Beidou terminal equipment of the mother ship receives the positioning information and acquires the position coordinate of the personal positioning terminal based on the positioning information so as to determine whether the position coordinate is within a preset self-rescue range;

if so, the shipborne Beidou terminal equipment of the mother ship responds to the personal positioning terminal to determine that the rescue mode of the person falling into the water is a self-rescue mode;

if not, the shipborne Beidou terminal equipment of the mother ship does not respond to the personal positioning terminal, and the rescue mode of the person falling into the water is determined to be the rescue mode of the person.

Further, in one or more embodiments of the present specification, the shipborne beidou terminal device of the mother ship receives the alarm instruction and the image information, and performs analysis and alarm based on the alarm instruction and the image information, and specifically includes:

the Beidou positioning communication unit of the shipborne Beidou terminal equipment transmits the alarm instruction and the image information to the display and control unit of the mother ship; the Beidou positioning communication unit is connected with a display control unit of the mother ship through a cable, and the display control unit is positioned in a cockpit of the mother ship;

the display control unit acquires the instruction type of the alarm instruction based on the alarm instruction;

if the display and control unit determines that the alarm instruction is a water falling instruction based on the instruction type of the alarm instruction, starting acousto-optic alarm of the shipborne Beidou terminal equipment, displaying the image information and the positioning information by the display and control unit, and acquiring sign information of a person falling into the water based on the image information, so that the shipborne Beidou terminal equipment can carry out alarm rescue based on the sign information, the basic information and the positioning information;

and if the display control unit determines that the alarm instruction is a release instruction based on the instruction category of the alarm instruction, ending the sound-light alarm of the shipborne Beidou terminal equipment.

Further, in one or more embodiments of the present specification, the positioning of the person falling into water transmits the alarm instruction and the image information to the emergency rescue management center through a built-in RD communication module and the beidou communication system, and specifically includes:

the personal positioning terminal transmits the alarm instruction to a Beidou satellite in the Beidou communication system based on a preset alarm communication protocol based on a built-in RD communication module, and transmits the image information to the Beidou satellite in the Beidou communication system through a preset image transmission strategy;

the satellite receiving antenna in the Beidou communication system receives the alarm instruction and the image information forwarded by the Beidou satellite so that a service platform in the Beidou communication system can acquire the alarm instruction and the image information;

and the service platform transmits the alarm instruction and the image information to the emergency rescue management center based on a preset network special line.

Optionally, in one or more embodiments of the present specification, the transmitting the alarm instruction to the beidou satellite in the beidou communication system based on a preset alarm communication protocol specifically includes:

the personal positioning terminal acquires constraint conditions of various Beidou satellites in the Beidou communication system; wherein the constraint condition comprises: the transmission power, the transmission information rate and the transmission information length;

the personal positioning terminal automatically divides the image information based on the constraint conditions to obtain a plurality of image information packages to be transmitted;

and the built-in RD communication module in the personal positioning terminal transmits the plurality of information packets to be transmitted according to a preset packet loss retransmission mechanism so as to transmit the image information to the emergency rescue management center based on a Beidou communication system.

Optionally, in one or more embodiments of the present specification, the transmitting the image information to a beidou satellite in a beidou communication system through a preset image transmission policy specifically includes:

the personal positioning terminal and the emergency rescue management center agree on the components of the preset communication transmission protocol and determine the position information of each component; wherein the composition comprises any one or more of the following: instruction type, data length, user address, information content and check code;

the personal positioning terminal determines an instruction format corresponding to each instruction composition component according to the preset byte range and the preset format information of each instruction composition component;

the personal positioning terminal arranges the instruction formats of the components based on the position information of the components to obtain the instruction format of the preset communication transmission protocol, and transmits the alarm instruction to the emergency rescue management center based on the instruction format.

Further, in one or more embodiments of the present specification, before the emergency rescue management center obtains the shipborne Beidou terminal device within a preset range based on the position information in the alarm instruction, the method further includes:

the emergency rescue management center analyzes the alarm instruction based on a preset communication transmission protocol to obtain the ID number of the Beidou terminal carried by the mother ship in the alarm information;

the emergency rescue management center sends alarm confirmation information to the shipborne Beidou terminal of the mother ship based on the ID number of the shipborne Beidou terminal of the mother ship; the alarm confirmation information is used for confirming whether the man falling into the water corresponding to the personal positioning terminal falls into the water to a shipborne Beidou terminal of the mother ship;

and if the emergency rescue management center receives return information of the shipborne Beidou terminal of the mother ship responding to the event confirmation information, determining whether the alarm instruction is misinformed or not based on the return information.

Further, in one or more embodiments of the present specification, after the personal positioning terminal is triggered to start the working state according to the linkage of the built-in multiple sensor switches, the method further includes:

acquiring current illumination intensity through a photosensitive sensor preset on the personal positioning terminal, and controlling a strobe light preset on the personal positioning terminal to be turned on if the personal positioning terminal determines that the current illumination intensity is lower than a preset illumination threshold value;

the personal positioning terminal acquires the starting time of the stroboscopic lamp, and determines the state adjustment time of the stroboscopic lamp based on a preset time period and the starting time;

and the personal positioning terminal adjusts the flicker frequency of the strobe light based on the state adjustment time.

One or more embodiments of the present specification provide an emergency rescue device for marine distress, which is applied to an emergency system for marine distress, the emergency system comprising a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center and a Beidou communication system, and the device includes:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to:

if the rescue mode is determined to be the rescue mode, the personal positioning terminal transmits the alarm instruction and the image information to the emergency rescue management center through a built-in RD communication module and a Beidou communication system in the marine distress emergency system;

the emergency rescue management center obtains shipborne Beidou terminal equipment within a preset range based on the position information in the alarm command, and sends the position information and the image information to the shipborne Beidou terminal equipment within the preset range through the Beidou communication system, so that ships where the shipborne Beidou terminal equipment is located within the preset range rescue personnel falling into water.

The embodiment of the specification adopts at least one technical scheme which can achieve the following beneficial effects:

the starting through the personal positioning terminal obtains the positioning information and the image information that built-in positioning module and collection equipment acquireed to based on communication module gives the warning with positioning information and image information transmission for on-board big dipper terminal equipment, when having avoided only rescuing based on-board terminal equipment in the traditional mode, when the personnel that fall into water lose contact, the problem of unable quick location. The rescue mode is used for rescuing people in distress on the sea, the problem that people falling into water cannot be organized to save themselves due to various reasons of the mother ship is solved, and the survival rate of the people falling into water is improved.

Drawings

In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present specification, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort. In the drawings:

fig. 1 is a schematic flow chart of an emergency rescue method for a marine distress provided in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an emergency system in distress at sea according to an embodiment of the present disclosure;

fig. 3 is a scene schematic diagram of a mother ship self-rescue range in an application scenario provided in the embodiment of the present disclosure;

fig. 4 is a schematic flow chart of a self-rescue mode in an offshore distress in an application scenario provided in an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a rescue mode in an application scenario provided in the embodiment of the present disclosure;

fig. 6 is a schematic flow chart of an emergency rescue method based on a rescue mode in a marine distress in an application scenario provided in the embodiment of the present specification;

fig. 7 is an internal structural schematic diagram of an emergency rescue device for marine distress provided in an embodiment of the present disclosure.

Detailed Description

The embodiment of the specification provides an emergency rescue method and equipment for marine distress.

With the rapid development of the industries involving the sea, such as fishery, maritime transportation industry and the like, the quantity and the scale of the people involving the sea are gradually expanding. Due to the fact that the marine environment climate is quite complex and changeable, accidents and dangerous situations of people falling into water caused by reef touch, collision and sinking are caused more and more every year. After a person wears a conventional life jacket and falls into water, the rescue plane or ship is difficult to find the position of the person in distress due to the lack of a positioning and position reporting device on the conventional life jacket, the person falling into water usually misses a 72-hour gold rescue period, and the search and rescue efficiency and the search and rescue success rate of the person falling into water are very low.

At present, marine distress call-for-help equipment used in the prior art is mainly divided into two categories, one category is marine distress call-for-help devices which are positioned by GNSS and based on short-distance radio communication, such as VHF-DSC or VHF-EPIRB equipment using CH70 channels, AIS-SART type AIS-MOB equipment and the like; the other type is a maritime distress call device based on GNSS positioning and satellite system communication, such as EPIRB equipment based on a global satellite search and rescue system and working on the frequency of 406MHz/121.5MHz, EPIRB equipment based on a maritime satellite system, satellite communication equipment based on a low-orbit iridium satellite communication system and BD-EPIRB or BD-MOB equipment based on a Beidou message satellite service system independently developed in China. Due to the fact that the ocean range is wide, after ships are in danger or people fall into water, the communication distance of the short-distance wireless communication maritime distress call device such as the VHF-DSC, the VHF-EPIRB and the AIS-MOB is limited, and the short-distance wireless communication maritime distress call device can only cover a few seas to dozens of seas around the periphery. When the distance between a ship with corresponding receiving equipment at the periphery and an onshore base station is long, alarm information is often not received and rescue is missed. And EPIRB equipment is all on-board, lacks individual MOB equipment, once boats and ships sink, and the personnel that fall into the water lose contact, search for and rescue the difficulty.

In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the present specification, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present specification without any creative effort shall fall within the protection scope of the present specification.

As shown in fig. 1, one or more embodiments of the present disclosure provide a method flow diagram of an emergency rescue method for a marine distress. As can be seen from fig. 1, an emergency rescue method for marine distress is applied to a marine distress emergency system composed of a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center and a Beidou communication system, and the method includes the following steps:

s101: the personal positioning terminal is triggered by linkage of a plurality of built-in sensor switches to start a working state, and acquires drowning information of a person falling into the water based on a built-in positioning module and acquisition equipment of the personal positioning terminal; wherein the overboard information comprises: positioning information, image information.

In order to improve the alarm reliability of the personal positioning terminal, reduce the power consumption of the personal positioning terminal and the false alarm rate of the personal positioning terminal, timely obtain the drowning information of the drowning person and improve the lifesaving rate of the drowning person. The method comprises the steps that a personal positioning terminal in the embodiment of the specification is triggered according to linkage of a plurality of built-in sensors, the working state of the personal positioning terminal is started, and then the falling-into-water information of falling-into-water personnel of the personal positioning terminal is obtained according to a built-in positioning module and a collection device after the working state is started. For example: the positioning information resolved by the Beidou communication system is acquired based on the Beidou RD positioning module, or the Beidou satellite signals are acquired according to the Beidou RN positioning module and resolved to acquire the positioning information. The method comprises the steps of obtaining image information of a person falling into water at a personal positioning terminal based on an infrared camera, and determining falling into water information of the person falling into water based on the positioning information and the image information.

Specifically, in one or more embodiments of the present specification, the method for turning on the working state of the personal positioning terminal according to the linkage trigger of the built-in multiple sensor switches specifically includes the following steps:

the personal positioning terminal obtains a current medium conductance value detected by a first sensor through the built-in first sensor, and due to the huge difference between the seawater conductance value and the freshwater conductance value, in the embodiment of the description, if the first sensor determines that the current conductance value is greater than a preset conductance threshold value, the first sensor triggers a corresponding first sensor switch, so that the first sensor switch is closed. Based on the mode, the embodiment of the specification avoids the problem of false alarm caused by automatic alarm after the first sensor of the personal positioning terminal detects that the personal positioning terminal is in contact with a water source when marine workers work in rainy and foggy weather. Meanwhile, a second sensor is arranged in the personal positioning terminal to detect and acquire a current water pressure value, and if the fact that the current water pressure value detected by the second sensor is larger than a preset water pressure threshold value is determined, the second sensor triggers a corresponding second sensor switch, so that the second sensor switch is closed. It should be noted that the individual positioning terminal may be fixed to the lifejacket or lifeboat/raft, or may be floating on the sea surface in a detachable manner and connected to the lifejacket or lifeboat/raft by a hauling cable. The preset water pressure threshold value is a corresponding alarm water pressure value obtained according to the water falling depth set by the personal positioning terminal. And if the personal positioning terminal determines that the corresponding first sensor switch and the corresponding second sensor switch are both triggered, the personal positioning terminal starts the working state. The problem that the personal positioning terminal is mistakenly started to give an alarm is reduced through linkage triggering of the plurality of sensors. In addition, the personal positioning terminal in the embodiments of the present description may also be based on a manual on working state.

Wherein, in order to obtain the locating information fast, thereby save rescue alarm time. In one or more embodiments of this specification, the method for acquiring the drowning information of the drowning person by the personal positioning terminal based on the built-in positioning module and the built-in acquisition module includes the following steps: firstly, the personal positioning terminal acquires image information of people falling into the water according to built-in acquisition equipment, and after the personal positioning terminal enters a working state, because a built-in RN positioning module does not store any information before RN cold start positioning, ephemeris needs to be downloaded, and the first positioning time of the personal positioning terminal is about 40-60s, the personal positioning terminal cannot report the position information at the first time of falling into the water based on the RN positioning module. After the personnel fall into the water, the rescue time often needs to compete for seconds, so that before the personal positioning terminal transmits information needing to be reported, such as an alarm instruction, image information and the like, whether the RN cold start positioning of the RN positioning module is successful or not is determined according to a return statement of the built-in RN positioning module. If the RN is determined to be successfully started in a cold mode according to the feedback statement, the personal positioning terminal resolves the Beidou satellite positioning signal received by the Beidou positioning communication antenna in the personal positioning terminal according to the built-in RN positioning module of the personal positioning terminal, and accordingly positioning information of the personal positioning terminal is obtained.

And if the RN is determined not to be successfully started in a cold mode according to the feedback statement, in order to save the alarm time, the personal positioning terminal obtains the positioning information of the personal positioning terminal according to the built-in Beidou RD communication module and the Beidou communication system. Specifically, in one or more embodiments of the present specification, the method for obtaining, by a personal positioning terminal, positioning information of the personal positioning terminal based on a built-in beidou RD communication module and the beidou communication system includes the following steps:

firstly, a personal positioning terminal sends a positioning request to a Beidou satellite in a Beidou communication system through a built-in Beidou RD communication module of the personal positioning terminal; it should be noted that the positioning request is a dual-satellite active positioning request, so as to obtain the position information of the personal positioning terminal based on the dual-satellite active positioning. Then the Beidou satellite sends a positioning request to a ground central station in a Beidou communication system, the ground central station acquires elevation data of the ground and position data of the Beidou satellite according to the received positioning request, three-ball interactive calculation is carried out according to the elevation data, the position of the ground central station and the position of the Beidou satellite, positioning information of a personal positioning terminal is acquired, and therefore the positioning information is sent to the personal positioning terminal based on the Beidou satellite. According to the embodiment of the specification, before RN cold start positioning succeeds, beidou RD double-satellite active positioning is adopted, an active positioning request is sent to a Beidou satellite through a Beidou RD communication module, a ground central station can calculate and obtain a water falling position based on a three-ball interaction principle according to a terminal positioning request and elevation data forwarded by 2 Beidou satellites, and then the water falling position is sent to an individual water falling positioning alarm terminal through the Beidou satellite. When the positioning information is obtained based on the method, the first capturing time of the RD communication module, the time delay of sending the positioning request information to the central station, the time length of the central station for resolving the position information and the time delay of sending the position information to the RD communication module by the central station are calculated, the active positioning time of the whole RD is not more than 3S, and compared with the first positioning time of cold start of the RN, the first positioning time of the cold start is 40-60S, the positioning time of the cold start is effectively reduced, the real-time performance of the whole system is improved, and the time required by alarming is saved.

Further, in order to guide the rescue aircraft or the ship to find the person falling into the water as soon as possible under the conditions of dark environment and known falling-into-water position, in one or more embodiments of the present specification, the personal positioning terminal is triggered according to the linkage of the switches with the built-in plurality of sensors, and after the working state is turned on, the method further includes the following processes:

the current illumination intensity is obtained through a photosensitive sensor preset on the personal positioning terminal, and if the personal positioning terminal determines that the current illumination intensity is lower than a preset illumination threshold value, a strobe light preset on the personal positioning terminal is controlled to be turned on. After the strobe preset on the personal positioning terminal is controlled to be started, the personal positioning terminal acquires the starting time of the strobe, and determines the state adjustment time of the strobe according to the preset time period and the starting time, so that the personal positioning terminal adjusts the flashing frequency of the strobe based on the state adjustment time. The photosensitive sensor controls the flash lamp to be started according to the illumination intensity and reduces the flash frequency of the flash lamp after the flash is accumulated, so that the average working power consumption of the terminal can be greatly reduced, and the working endurance time of the terminal is prolonged.

S102: the personal positioning terminal determines an alarm instruction according to the positioning information and the basic information of the personal positioning terminal; wherein the basic information includes: device type, device number, user information.

Based on the step S101, the personal positioning terminal obtains the positioning information after starting to work, and in order to transmit the relevant information of the person falling into the water to the corresponding shipborne Beidou terminal device of the mother ship, the personal positioning terminal obtains the positioning information according to the positioning information and the basic information of the personal terminal, for example: the alarm instruction is determined according to the equipment type, the equipment number, the user information and the like, so that after the alarm instruction is transmitted to the display and control unit of the shipborne Beidou terminal of the mother ship, the display and control unit of the shipborne Beidou terminal can analyze and display the information content of the instruction and start acousto-optic alarm.

S103: the personal positioning terminal sends the alarm instruction and the image information to shipborne Beidou terminal equipment of a mother ship through a built-in wireless communication module of the personal positioning terminal so as to determine a rescue mode of people falling into water based on the response of the shipborne Beidou terminal equipment; the rescue mode is a self-rescue mode and a rescue mode.

In order to guarantee timely rescue of people falling into water, the personal positioning terminal in the embodiment of the specification shown in fig. 2 sends an alarm instruction and image information to shipborne Beidou terminal equipment of the mother ship through a built-in wireless communication module, so that the rescue mode of the people falling into water is determined to be a self rescue mode based on the mother ship or other rescue modes based on other ships or rescue equipment according to the return response of the shipborne Beidou terminal equipment.

Specifically, in one or more embodiments of the present specification, the personal positioning terminal sends the alarm instruction and the image information to a ship-borne beidou terminal device of a mother ship through a preset wireless communication module, so as to determine a rescue mode of a person falling into water based on a response of the ship-borne beidou terminal device, and specifically includes the following steps:

firstly, the personal positioning terminal sends positioning information to shipborne Beidou terminal equipment of a mother ship through a preset wireless communication module. The shipborne Beidou terminal device of the mother ship receives the positioning information, and acquires the position coordinate of the personal positioning terminal based on the positioning information, so as to determine whether the position coordinate is located in a preset self-rescue range, and solve the problem that the mother ship cannot carry out quick rescue on the personnel falling into the water based on a self-rescue mode under the scene that the personnel falling into the water are far away from the mother ship due to bad weather. As shown in fig. 3, if it is determined that the current person falling into the water is within the self-rescue range of the mother ship according to the positioning information of the person falling into the water, the shipborne Beidou terminal device of the mother ship responds to the personal positioning terminal, and the rescue mode of the person falling into the water is determined to be the self-rescue mode. If the person falling into the water is determined not to be in the preset self-rescue range of the mother ship according to the positioning information of the personal positioning terminal, the shipborne Beidou terminal device of the mother ship does not respond to the personal positioning terminal, and the rescue mode of the person falling into the water is determined to be the rescue mode of the person.

S104: and if the rescue mode is determined to be the self-rescue mode, the shipborne Beidou terminal equipment of the mother ship receives the alarm instruction and the image information, analyzes and gives an alarm.

If the rescue mode is determined to be the self-rescue mode based on the step S103, the shipborne Beidou terminal of the mother ship receives the alarm instruction and the image information of the personal positioning terminal, so that the situation of people falling into the water is analyzed and alarmed based on the alarm instruction and the image information. Among them, it should be noted that: the image information can be used for human vital sign determination such as: the conditions of waking, coma and death of the person falling into the water are judged, and the surrounding environment of the person falling into the water can be acquired, for example: weather conditions, storm conditions and the like, so that rescue workers can adjust rescue strategies according to the vital signs and the surrounding environment conditions of the people falling into the water, an optimal rescue scheme is made, and the survival rate of the people falling into the water is improved.

The Beidou positioning communication unit transmits the alarm instruction and the image information to a display and control unit of the mother ship; wherein, what need explain is that big dipper location communication unit passes through the cable conductor and is connected with the display control unit of mother's ship, and shows that control unit is located the cockpit of mother's ship, for example: according to the shipborne Beidou terminal equipment under a certain application scene, the Beidou positioning communication unit can be fixed on a mast of a ship and is connected with the display and control unit in the cockpit through a cable.

After the Beidou positioning communication unit of the shipborne Beidou terminal equipment transmits the alarm instruction and the image information to the display and control unit of the mother ship, the display and control unit acquires the instruction type of the alarm instruction according to the alarm instruction. If the display and control unit determines that the alarm instruction is the water falling instruction based on the instruction type of the alarm instruction, the sound and light alarm of the shipborne Beidou terminal equipment is started, the display and control unit displays image information and positioning information, and obtains sign information of the water falling personnel based on the image information, so that the shipborne Beidou terminal equipment can carry out alarm rescue based on the sign information, the basic information and the positioning information. On the contrary, if the display control unit determines that the alarm instruction is a release instruction according to the instruction category of the alarm instruction, the sound-light alarm of the shipborne Beidou terminal equipment is finished.

As shown in fig. 4, a schematic flow chart of a self-rescue mode in a marine distress in an application scenario provided in the embodiment of the present specification is shown. As can be seen from fig. 4, in the self-rescue mode: after the personal positioning terminal automatically enters the drowning positioning alarm working state through manual or triggering based on a plurality of sensors, the personal positioning terminal utilizes the wireless communication module and transmits the frequency according to the preset frequency, for example: and 30 seconds/time or 60 seconds/time, and sending the drowning alarm instruction and the image to the shipborne Beidou terminal display and control unit of the mother ship based on a self-defined drowning alarm communication protocol. And the position information contained in the drowning alarm command adopts RD active positioning before RN cold start positioning is successful, and RN positioning is adopted after RN positioning is successful. The integrated wireless communication unit of display and control unit in the on-board big dipper equipment of mother ship receives alarm command and the image of falling into water and carries out the analysis to show alarm information and image on the display screen, carry out audible and visual alarm through the megaphone, the warning light with display and control unit external simultaneously, remind the crewman of mother ship to organize personnel at once and rescue. If the man-made false triggering or the equipment false triggering is carried out, the man-made false triggering or the equipment false triggering can be carried out, the man-made false triggering or the equipment false triggering is carried out, the man-made false falling water positioning alarm terminal sends a falling water alarm removing instruction to the display and control unit of the shipborne Beidou terminal of the mother ship through a user-defined falling water alarm communication protocol, then the man-made false triggering or the equipment false triggering is carried out, the man-made false falling water positioning alarm terminal is shut down, the man-made false falling water positioning alarm terminal sends the falling water alarm removing instruction to the display and control unit of the shipborne Beidou terminal of the mother ship, and then the man-made false triggering or the equipment false triggering is shut down, and the display and control unit removes the sound and light alarm after receiving the instruction. Based on this mode, when taking place personnel accident and fall into water under the intact circumstances of mother ship, just can mobilize the mother ship crewman and organize the personnel of falling into water to the accident and save oneself within 5 seconds, can promote the survival rate of the personnel of falling into water greatly, realized the warning linkage of falling into water of individual positioning terminal and on-board big dipper terminal.

S105: and if the rescue mode is determined to be the rescue mode, the personal positioning terminal transmits the alarm instruction and the image information to the emergency rescue management center through a built-in RD communication module and a Beidou communication system in the marine distress emergency system.

If the rescue mode is determined to be the rescue mode based on the step S103, in order to quickly notify other ships or other rescue equipment to carry out rescue in the embodiment of the present specification, the personal positioning terminal transmits the alarm instruction and the image information of the personal positioning terminal to the emergency rescue management center through the built-in RD communication module and the beidou communication system in the marine emergency system in distress, so that the real-time performance and the reliability of rescue are improved.

Specifically, in one or more embodiments of the present specification, the personal drowning location transmits the alarm instruction and the image information to the emergency rescue management center through the built-in RD communication module and the beidou communication system, and specifically includes the following steps:

as shown in fig. 5, in one or more embodiments of the present disclosure, a schematic diagram of a rescue mode in a certain application scenario is provided. Firstly, the personal positioning terminal transmits an alarm instruction to a Beidou satellite in a Beidou communication system based on a preset alarm communication protocol based on a built-in RD communication module, and transmits image information to the Beidou satellite in the Beidou communication system through a preset image transmission strategy. And then a satellite receiving antenna in the Beidou communication system receives the alarm instruction and the image information from the personal positioning terminal forwarded by the Beidou satellite so that a service platform in the Beidou communication system can acquire the alarm instruction and the image information, and then the service platform transmits the alarm instruction and the image information to an emergency rescue management center according to a preset network private line. As shown in fig. 6, in one or more embodiments of the present specification, a flow diagram of an emergency rescue method based on a rescue mode of a user in a certain application scenario is provided. As can be seen from fig. 6, according to a preset transmission frequency, for example, 60 s/time, the RD communication module sends the image information including the drowning alarm information and the sub-packets including the position information, the time information, the device type, the alarm type, the state information, the device number, the device ID number, the crew information, the ID number of the Beidou terminal carried by the mother ship to the Beidou satellite. After receiving the alarm information and the images through a satellite receiving antenna of the ground central station, the Beidou third civil service platform transmits the alarm information and the images to an onshore emergency rescue management center through a network private line, so that the emergency rescue management center can analyze and organize rescue according to the alarm information and the image information. The effect of asking for help from an onshore emergency rescue management center by using Beidou RD communication under the scene that the mother ship is sunken in danger or people falling into water are far away from the mother ship due to severe weather is achieved. The problem that in the existing mode, the drowning positioning alarm device utilizing short-distance wireless communication such as AIS and VHF radio stations cannot obtain timely rescue under the conditions that a mother ship sinks and no ship exists in a certain peripheral range is effectively solved.

Further, in order to ensure the reliability of data transmission, the reliable transmission of the alarm instruction is realized. In one or more embodiments of the present description, the method for transmitting the alarm instruction to the beidou satellite in the beidou communication system based on the preset alarm communication protocol specifically includes the following steps:

firstly, a personal positioning terminal and an emergency rescue management center set components of a preset communication transmission protocol and determine position information of each component; wherein, it is required to be noted that the composition comprises any one or more of the following components: instruction type, data length, user address, information content and check code. And the personal positioning terminal determines the instruction format corresponding to each instruction composition component according to the preset byte range and the preset format information of each instruction composition component. Then the personal positioning terminal arranges the instruction formats of the components based on the position information of the components to obtain the instruction format of a preset communication transmission protocol, and transmits an alarm instruction to the emergency rescue management center based on the instruction format. The following table 1 shows an instruction format of a communication transmission protocol provided in an embodiment of the present specification:

table 1 Preset Command Format for communication transport protocol

As can be seen from table 1, the instruction type is 5 bytes, and what needs to be described is that the instruction is represented by ASCII codes during transmission, each ASCII code occupies 1 byte, an ASCII code "$" is used as a starting symbol, and the next 4 bytes represent the instruction type. The instruction classes are two types: an alarm instruction and an alarm release instruction. The alarm instruction is "$ LSBJ", is used at the individual positioning terminal, and is used for manual or automatic falling into water triggers the on-board big dipper terminal display and control unit of the mother ship to transmit the alarm instruction that falls into water, and the display and control unit analyzes and displays the information content of the instruction and starts audible and visual alarm. The alarm relieving instruction is "$ LSBC", is used at the personal positioning terminal, and is used for manually or automatically transmitting the alarm relieving instruction after being triggered by mistake, through manual shutdown and to the ship-borne Beidou terminal display and control unit of the mother ship, and the sound-light alarm is closed after the display and control unit analyzes the instruction. As can be seen from table 1, the length is 2 bytes, which indicates the total number of bytes of data from the "instruction" start symbol "$" to the "checksum" (including the checksum), and the single instruction length 58 of the protocol.

The length of the user address is 3 bytes, the user address represents the local address of the shipborne Beidou terminal of the mother ship, namely the ID number, the effective bit is 21 bits, and the high 3 bits are filled with '0'. The length of the information content is 48 bytes, and the information content comprises 9 parameters of equipment type, alarm type, time, longitude, latitude, state information, equipment number, crew information and extension byte. And (3) representing by using binary original codes, filling each parameter item according to the length required by the format, and supplementing '0' in high order when the length requirement is not met. The information is transmitted in whole byte, and the multi-byte information firstly transmits high-order byte and then transmits low-order byte. The length of the checksum is 1 byte, which represents the result of exclusive-or by byte starting from the "instruction" start "$" to the "checksum" previous byte.

Further, it should be noted that the specific information of the device type, the alarm type, the time, the longitude, the latitude, the status information, the device number, the crew information, and the 9 extended bytes included in the information content is: the length of the equipment type is 1 byte, 0x 01H-fixed personal drowning positioning alarm terminal, and 0x 02H-detachable personal positioning terminal. The alarm type length is 1 byte, 0x 01H-automatic water falling alarm, 0x 02H-manual water falling alarm. The time is Beijing time, and 6 bytes are 1 byte each for year (the last two digits of year are represented by binary code, for example, 10 for 2010), month (1-12), day (1-31), hour (0-23), minute (0-59), and second (0-59). Longitude: the range (E represents east longitude, W represents west longitude), degrees (0-180), minutes (0-59), seconds (0-59), 0.1 seconds (0-9) are each 1 byte, and total 5 bytes. Latitude: the range (N represents north latitude, S represents south latitude), degree (0 to 90), minutes (0 to 59), seconds (0 to 59), and 0.1 second (0 to 9) are each 1 byte, for a total of 5 bytes. The length of the state information is 1 byte, and the state information consists of a positioning state P, a south-north latitude mark W, an east-west longitude mark J, RD positioning recognition B and 6bit effective bits of the residual battery capacity VV, wherein the high 2bit is filled with '0'. The equipment number length is 1 byte, represents the individual drowning positioning alarm terminal matched with the mother ship, and the equipment numbers are numbered from 1 to 255 in sequence. The length of the crew information is 20 bytes, and the crew information comprises the name of the crew and the year and month of birth. The extended byte is 8 bytes in length as a spare byte. Table 2 below shows a format of indicating a positioning status provided in an embodiment of the present disclosure, and table 3 shows a status table of a battery remaining circuit provided in an embodiment of the present disclosure.

TABLE 2 positioning status representation Format

0

P

W

J

B

V

As shown in table 2 above, RNSS locates state P: indicating the RNSS positioning state, 0-positioning success and 1-positioning failure (first default); north-south latitude mark W: represents whether the current position is at south latitude or north latitude, 0- - -north latitude (default), 1- - -south latitude; east-west longitude mark J: indicating whether the current location is at east longitude or west longitude, 0-east longitude (default), 1-west longitude; RD location identification B: whether the position of the data packet is obtained by active positioning or not is represented, and 0 is not, 1 is (the first default);

TABLE 3 State representation Table of Battery remaining Circuit

State value of remaining battery capacity	00	01	10	11
					Residual capacity	≤25％	25-50％	50-75％	≥75％

As can be seen from Table 3, when the state value of the remaining battery capacity is "00", it means that the remaining battery capacity is less than or equal to 25%; when the state value of the residual electric quantity of the battery is '01', the state value represents 25% -50% of the residual electric quantity; when the state value of the residual electric quantity of the battery is 10, the state value represents that the residual electric quantity is 50% -70% electricity; the state value of the remaining battery power is "11"

When the residual capacity is larger than or equal to 75 percent.

In particular, the reliable transmission of the image is realized according to the requirement of the emission power of the Beidou system. In one or more embodiments of the present specification, transmitting image information to a beidou satellite in a beidou communication system through a preset image transmission policy specifically includes the following processes:

firstly, a personal positioning terminal acquires constraint conditions of various Beidou satellites in a Beidou communication system; it should be noted that the constraint conditions include: transmit power, transmit information rate, transmit information length, etc. Specifically, the constraints are shown in table 4 below:

as can be seen from table 4, when the first gear is transmitted, the information rate is the lowest, the transmission power is the lowest, and the information capacity of each transmission is also the smallest; and when the fourth gear is transmitted, the information rate is highest, the transmission power is maximum, and the information capacity of each transmission is also maximum. In order to meet the low power consumption requirement of the personal overboard positioning alarm terminal, the transmission gear is the first gear, and the transmission power is the lowest (2W), so that the defect that the information rate is only 2kbps, the longest inbound telegraph text is only 1882bits, and one-time transmission of shot images cannot be met is caused. Therefore, in the embodiment of the present specification, the personal positioning terminal automatically segments the image information according to the obtained constraint conditions, so as to obtain a plurality of image information packets to be transmitted, so that after the image information is segmented into a plurality of packets, each image information packet is transmitted for multiple times by using the transmission power according with the beidou system. The built-in RD communication module in the personal positioning terminal transmits the plurality of information packages to be transmitted according to a preset package loss retransmission mechanism, so that the image information is transmitted to an emergency rescue management center based on a Beidou communication system, and the purpose of reliably transmitting data is achieved.

After the Beidou communication system transmits the image information to the emergency rescue management center, the current state information of people falling into water is conveniently acquired, the auxiliary emergency rescue management center is convenient to determine the vital signs of the current people falling into water, and rescue response is conveniently and quickly made. In the embodiment of the description, after the image information is acquired, in order to quickly lock the drowning person to analyze the sign information of the drowning person, it is first required to intercept sub-image information of the drowning person contained in the image information, acquire the temperature of a medium where the drowning person is currently located and the drowning time of the drowning person, and input the sub-image information, the temperature and the drowning time into a preset image classification model, so as to obtain a sign label corresponding to the drowning person. It should be noted that, in order to obtain the accuracy of increasing the identification of the physical sign label of the person falling into water, before the sub-image information is input into the preset image classification model, the method further includes the following steps: acquiring the drowning time of the drowning person and different states of the drowning person corresponding to the temperature of a medium where the drowning person is located, and determining a plurality of classification layers of a preset deep learning model based on the different states of the drowning person. Then crawling the rescue video of the drowning person in each open website, acquiring a key frame of the rescue video based on a preset acquisition frequency, marking the sign information of the drowning person contained in the key frame of the rescue video, the temperature of a medium where the drowning person is located and the rescue time of the drowning person, acquiring corresponding key frame marking images, and taking each key frame marking image as a training sample of the deep learning model. Training a deep learning model with a plurality of classification layers based on the training sample to obtain an image classification model meeting requirements, and identifying the sub-image information according to the image classification model to obtain the sign label of the person falling into water. After the marine life-saving equipment obtains the sign labels corresponding to the people falling into the water, the sign labels are displayed on a display screen of an emergency rescue management center, so that rescue personnel of the emergency rescue management center can predict rescue limit time of the people falling into the water based on information of the sign labels, and ship organizations where the ship-borne Beidou terminal equipment is located can be searched for rapidly in the rescue limit time to carry out rescue actions.

S106: the emergency rescue management center acquires the shipborne Beidou terminal equipment within a preset range based on the position information in the alarm instruction, and sends the position information and the image information to the shipborne Beidou terminal equipment within the preset range through the Beidou communication system, so that ships where the shipborne Beidou terminal equipment is located within the preset range rescue people falling into water.

After the alarm instruction is transmitted to the emergency rescue management center according to the step S105, in order to realize quick rescue of people falling into the water, the emergency rescue management center acquires the shipborne Beidou terminal device within the preset range based on the position information in the alarm instruction, and sends the position information and the image information to the shipborne Beidou terminal device within the preset range through the Beidou communication system, so that the ships where the shipborne Beidou terminal devices are located within the preset range rescue the people falling into the water.

Specifically, in one or more embodiments of the present specification, before the emergency rescue management center obtains the shipborne Beidou terminal device within the preset range based on the position information in the alarm instruction, the method further includes:

the emergency rescue management center analyzes the alarm instruction according to a preset communication transmission protocol, and accordingly the ID number of the Beidou terminal carried by the mother ship in the alarm information is obtained. And then, the emergency rescue management center sends alarm confirmation information to the shipborne Beidou terminal of the mother ship according to the shipborne Beidou terminal ID number of the mother ship. The alarm confirmation information to be described is used for confirming whether the user corresponding to the personal positioning terminal falls into water or not to the shipborne Beidou terminal of the mother ship. If the emergency rescue management center receives the return information of the shipborne Beidou terminal of the mother ship responding to the event confirmation information, whether the alarm instruction has the problem of false alarm or not is determined according to the return information.

As shown in fig. 6, the emergency rescue management center firstly contacts the ship through the big dipper short message or the satellite phone to determine whether the man-made false triggering or the automatic false triggering of the equipment is performed according to the ID number of the big dipper terminal carried by the mother ship in the alarm information. If the artificial false triggering is confirmed, the personal drowning positioning alarm terminal is commanded to be manually closed, and related personnel are warned; and if the equipment is determined to be triggered mistakenly, commanding to manually close the personal overboard positioning alarm terminal, knowing the environmental conditions of the equipment false triggering at that time and contacting equipment manufacturers for technical support if necessary. And if the accident of falling into water really happens due to the confirmation of non-false triggering, inquiring whether the mother ship can finish self rescue. If the mother ship can finish self rescue, the shore emergency rescue management center finishes the alarm response. If the mother ship cannot complete self rescue or cannot get contact with the mother ship for a long time, according to the drowning position information, the position is used as the center, the X sea is used as the radius (the X is determined according to the actual condition), and the Beidou command machine informs the ship loaded with the shipborne Beidou terminal in the radius area to implement mutual rescue on the drowning personnel by using the Beidou satellite and the Beidou short message. The Beidou commander comprises a Beidou second commander and a Beidou third commander, and the Beidou second commander communicates with a ship loaded with a Beidou second terminal, informs the ship of the position information of people falling into the water and organizes rescue; the Beidou third commander communicates with the ship loaded with the Beidou third terminal, informs the ship of the position information of people falling into the water and organizes rescue. According to the method, under the scene that the mother ship is sunken in danger or people falling into water are far away from the mother ship due to severe weather, the Beidou RD communication is utilized to ask for help from an onshore emergency rescue management center, and surrounding ships, rescue airplanes and rescue ships are organized for rescue. The problem that the drowning positioning alarm device utilizing short-distance wireless communication cannot obtain pain points for timely rescue in the situations that a mother ship sinks and no ship exists in a certain peripheral range is effectively solved. Meanwhile, the shore emergency rescue management center can avoid the waste of public resources caused by the fact that rescue force is organized blindly and a rescue airplane and a rescue ship are driven due to false triggering through a false alarm confirmation mechanism.

As shown in fig. 7, in one or more embodiments of the present specification, an emergency rescue device for marine distress is provided, which is applied to an emergency system for marine distress, where the emergency system is composed of a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center, and a Beidou communication system, and the emergency rescue device includes:

at least one processor; and the number of the first and second groups,

the at least one processor having stored thereon executable instructions of the at least one processor to enable the at least one processor to perform:

the personal positioning terminal is triggered by linkage of a plurality of built-in sensor switches to start a working state, and acquires drowning information of a user based on a built-in positioning module and acquisition equipment; wherein the overboard information comprises: positioning information and image information;

the personal positioning terminal sends the alarm instruction and the image information to shipborne Beidou terminal equipment of a mother ship through a built-in wireless communication module of the personal positioning terminal so as to determine a rescue mode of people falling into water based on the response of the shipborne Beidou terminal equipment; the rescue mode comprises a self-rescue mode and a rescue mode;

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments of the apparatus, the device, and the nonvolatile computer storage medium, since they are substantially similar to the embodiments of the method, the description is simple, and for the relevant points, reference may be made to the partial description of the embodiments of the method.

The foregoing description of specific embodiments has been presented for purposes of illustration and description. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

The above description is merely one or more embodiments of the present disclosure and is not intended to limit the present disclosure. Various modifications and alterations to one or more embodiments of the present description will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of one or more embodiments of the present specification should be included in the scope of the claims of the present specification.

Claims

1. An emergency rescue method for marine distress is characterized by being applied to a marine distress emergency system consisting of a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center and a Beidou communication system, and comprising the following steps:

2. An emergency rescue method for marine distress according to claim 1, wherein the personal positioning terminal is triggered to start working states according to linkage of a plurality of built-in sensor switches, and specifically comprises:

3. The emergency rescue method for marine distress according to claim 1, wherein the acquiring of the drowning information of the drowning person based on the positioning module and the collection device built therein specifically comprises:

4. The marine advance emergency rescue method according to claim 3, wherein the obtaining of the positioning information of the personal positioning terminal by the personal positioning terminal based on the built-in Beidou RD communication module and the Beidou communication system specifically comprises:

the personal positioning terminal sends a positioning request to a Beidou satellite in the Beidou communication system through a built-in Beidou RD communication module; the positioning request is a double-star active positioning request;

5. An emergency rescue method for marine distress according to claim 1, wherein the personal positioning terminal sends the alarm command and the image information to a ship-borne Beidou terminal device of a mother ship through a preset wireless communication module so as to determine a rescue mode of personnel overboard based on a response of the ship-borne Beidou terminal device, and the method specifically comprises the following steps:

6. The emergency rescue method for marine distress according to claim 1, wherein the shipborne Beidou terminal device of the mother ship receives the alarm command and the image information, analyzes and gives an alarm based on the alarm command and the image information, and specifically comprises:

and if the display control unit determines that the alarm instruction is a release instruction based on the instruction category of the alarm instruction, ending the audible and visual alarm of the shipborne Beidou terminal equipment.

7. The emergency rescue method for marine distress according to claim 1, wherein the personal overboard location transmits the alarm command and the image information to the emergency rescue management center through a built-in RD communication module and the Beidou communication system, and specifically comprises:

and the service platform transmits the alarm instruction and the image information to the emergency rescue management center based on a preset network private line.

8. The emergency rescue method for marine distress according to claim 7, wherein the transmitting the alarm command to the beidou satellite in the beidou communication system based on a preset alarm communication protocol specifically comprises:

the personal positioning terminal and the emergency rescue management center agree on the components of the preset communication transmission protocol and determine the position information of each component; wherein the composition comprises any one or more of: instruction type, data length, user address, information content and check code;

and the personal positioning terminal arranges the instruction formats of the components based on the position information of the components to obtain the instruction format of the preset communication transmission protocol, and transmits the alarm instruction to the emergency rescue management center based on the instruction format.

9. The emergency rescue method for marine distress according to claim 7, wherein the transmitting the image information to a beidou satellite in a beidou communication system through a preset image transmission strategy specifically comprises:

the personal positioning terminal acquires constraint conditions of various Beidou satellites in the Beidou communication system; wherein the constraint condition comprises: transmitting power, transmitting information rate and transmitting information length;

10. An emergency rescue method for marine distress according to claim 1, wherein before the emergency rescue management center obtains the shipborne Beidou terminal device within a preset range based on the position information in the alarm command, the method further comprises:

11. An emergency rescue method for marine distress according to claim 1, wherein after the personal positioning terminal is triggered to start the working state according to the linkage of a plurality of built-in sensor switches, the method further comprises:

12. The utility model provides an emergency rescue equipment in marine distress which characterized in that is applied to the marine emergency system in distress who comprises personal positioning terminal, on-board big dipper terminal equipment, emergency rescue management center, big dipper communication system, equipment includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the at least one memory stores executable instructions of the at least one processor to enable the at least one processor to perform the method of any one of claims 1-11.