CN109143158B - Ship personnel positioning method and system - Google Patents
Ship personnel positioning method and system Download PDFInfo
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- CN109143158B CN109143158B CN201810737644.7A CN201810737644A CN109143158B CN 109143158 B CN109143158 B CN 109143158B CN 201810737644 A CN201810737644 A CN 201810737644A CN 109143158 B CN109143158 B CN 109143158B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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Abstract
The invention discloses a method and a system for positioning ship personnel, wherein the method comprises the following steps: the base station transmits a wireless inquiry signal; the positioning terminal determines the received wireless query signal with the strongest signal intensity as a target signal; the positioning terminal judges whether the number of the base station to which the target signal belongs is the same as the number of the base station received last time; if yes, the positioning terminal sends a position coverage signal to the base station, so that the base station sends the position coverage signal to management center equipment; if not, the positioning terminal sends a position inquiry signal and the heart rate data of the crew to the base station so that the information point contained in the base station calculates the position data of the positioning terminal and sends the calculated position data and the heart rate data of the crew to the management center equipment. The invention can position the ship personnel in real time, master the dynamic state of the ship personnel, and can rescue the ship personnel in time when the ship personnel fall into water, thereby ensuring the life safety of the ship personnel.
Description
Technical Field
The invention relates to the technical field of positioning, in particular to a method and a system for positioning ship personnel; the ship is suitable for ships with more personnel, in particular scientific research ships, cruise ships and passenger ships.
Background
In the prior art, a ship belongs to a multi-cabin structure, and because a ship body is constructed by multi-purpose metal, barriers are more, particularly, the concentration of personnel such as scientific research ships, cruise ships, passenger ships and the like is high, and ship personnel are not familiar with water and the ship structure, communication can be carried out only by broadcasting calls, searching people by telephone and intercoms in order to confirm the position information of the personnel in the operation process. As a scientific investigation ship, a large number of students in passengers are going to the sea, so that the requirement on the safety guarantee of personnel is higher, and the responsibility is more important. The people searching mode is passive, the whole ship personnel dynamic state cannot be mastered in real time, especially when an accident occurs, if personnel fall into water and other emergency situations, the people searching mode in the prior art has obvious defects, the personnel fall into water cannot be found in time, and accurate positioning on the ship falling into water cannot be accurately carried out after the personnel fall into water is found, so that the searching and rescuing efficiency is low, and the life safety of the ship falling into water is greatly threatened.
Disclosure of Invention
The invention aims to provide a positioning method for ship personnel, which can position the ship personnel in real time, master the dynamic state of the whole ship personnel, and timely rescue the ship personnel when the ship personnel fall into water to ensure the life safety of the ship personnel.
In order to achieve the purpose, the invention provides a ship personnel positioning method, which comprises the following steps: s1, a base station transmits a wireless query signal; the wireless inquiry signal carries the number of the base station to which the wireless inquiry signal belongs;
s2, a positioning terminal worn on a crew receives at least one wireless query signal, and determines the wireless query signal with the strongest signal strength in the at least one wireless query signal as a target wireless query signal;
s3, the positioning terminal judges whether the number of the base station to which the target wireless inquiry signal belongs is the same as the number of the base station to which the target wireless inquiry signal received by the positioning terminal at the previous time belongs; if the two are the same, executing steps S311-S312; if not, executing steps S321-S322;
s311, the positioning terminal sends a position covering signal to a base station to which the target wireless inquiry signal belongs, so that the base station to which the target wireless inquiry signal belongs sends the position covering signal to management center equipment;
s312, the management center equipment stores the received latest position data of the positioning terminal as the position data of the positioning terminal at the current moment;
s321, the positioning terminal sends a position query signal and heart rate sign data of a crew to a base station to which the target wireless query signal belongs, so that information points contained in the base station calculate the position data of the positioning terminal, and the position data of the positioning terminal and the heart rate sign data of the crew are sent to management center equipment;
and S322, the management center equipment stores the position data of the positioning terminal as the position data of the current moment of the positioning terminal.
Preferably, before the base station transmits the wireless inquiry signal, the positioning method further comprises the following steps: the positioning terminal calls a heart rate detection bracelet worn by a crew at a preset calling moment; the heart rate detection bracelet transmits the detected heart rate physical sign data of the crew to the positioning terminal; and the positioning terminal stores the received heart rate sign data of the crew.
Preferably, after the management center device stores the position data of the positioning terminal as the position data of the positioning terminal at the current time, the positioning method further includes the steps of: the management center equipment judges whether the heart rate physical sign data of the crew is normal or not; and if the current position data of the positioning terminal is abnormal, the management center equipment calls the monitoring video at the current position of the positioning terminal according to the current position data of the positioning terminal so as to determine the safety of the crew.
Preferably, the positioning method further comprises the steps of: the positioning terminal detects whether an internal circuit of the positioning terminal is short-circuited in real time; if yes, the positioning terminal sends a distress signal to at least one base station to which at least one wireless inquiry signal received by the positioning terminal belongs; the distress signal comprises GPS positioning data of a positioning terminal; at least one base station receiving the distress signal sends the distress signal to management center equipment; the management center equipment sends out an emergency alarm signal.
Preferably, after the management center device sends the emergency alert signal, the positioning method further includes the steps of: the management center equipment calls historical position data of the positioning terminal, a plan view of the ship and a perspective view of the ship; the management center device marks the historical position of the positioning terminal on a plane view of the ship and a perspective view of the ship respectively and displays the historical position on a screen to obtain a historical movement track diagram of the positioning terminal.
Another objective of the present invention is to provide a positioning system for ship personnel, including a base station, a positioning terminal, and a management center device:
wherein, the base station includes: a signal transmitting unit for transmitting a wireless inquiry signal; the wireless inquiry signal carries the number of the base station to which the wireless inquiry signal belongs;
wherein, positioning terminal wears on the marine personnel body, includes: the signal receiving unit is used for receiving at least one wireless inquiry signal and determining the wireless inquiry signal with the strongest signal intensity in the at least one wireless inquiry signal as a target wireless inquiry signal; the first judging unit is used for judging whether the number of the base station to which the target wireless inquiry signal belongs is the same as the number of the base station to which the target wireless inquiry signal received by the positioning terminal at the previous time belongs; the first sending unit is used for sending a position covering signal to the base station to which the target wireless inquiry signal belongs when the first judging unit judges that the number of the base station to which the target wireless inquiry signal belongs is the same as the number of the base station to which the target wireless inquiry signal belongs received by the positioning terminal at the previous time, so that the base station to which the target wireless inquiry signal belongs sends the position covering signal to the management center equipment;
wherein, management center equipment includes: a first position storage unit for storing the latest received position data of the positioning terminal as the current position data of the positioning terminal;
the positioning terminal further comprises: the second sending unit is used for sending a position inquiry signal and the heart rate sign data of the crew to the base station to which the target wireless inquiry signal belongs when the first judging unit judges that the number of the base station to which the target wireless inquiry signal belongs is different from the number of the base station to which the target wireless inquiry signal belongs received by the positioning terminal last time, so that the information point contained in the base station calculates the position data of the positioning terminal, and sends the position data of the positioning terminal and the heart rate sign data of the crew to the management center equipment;
the management center device further includes: and the second position storage unit is also used for storing the position data of the positioning terminal as the position data of the current moment of the positioning terminal.
Preferably, the positioning system further comprises a heart rate detection bracelet:
the positioning terminal further comprises: the calling unit is used for calling the heart rate detection bracelet worn by the crew at a preset calling moment before the signal transmitting unit transmits the wireless query signal;
wherein, rhythm of the heart detects bracelet includes: the third sending unit is used for sending the detected heart rate sign data of the crew to the positioning terminal;
the positioning terminal further comprises: and the data storage unit is used for storing the received heart rate sign data of the crew.
Preferably, the management center apparatus further includes: the second judgment unit is used for judging whether the heart rate physical sign data of the crew is normal or not after the second position storage unit stores the position data of the positioning terminal as the position data of the positioning terminal at the current moment; and the monitoring and calling unit is used for calling the monitoring video at the current position of the positioning terminal according to the current position data of the positioning terminal when the second judging unit judges that the heart rate physical sign data of the crew is abnormal so as to determine the safety of the crew.
Preferably, the positioning terminal further comprises: the detection unit is used for detecting whether the internal circuit of the positioning terminal is short-circuited in real time; the fourth sending unit is used for sending a distress signal to at least one base station to which at least one wireless inquiry signal received by the positioning terminal belongs when the detection unit detects that the internal circuit of the positioning terminal is short-circuited; the positioning terminal is provided with a GPS positioning device, and the distress signal comprises GPS positioning data of the positioning terminal;
the base station further comprises: the fifth sending unit is used for sending the distress signal to the management center equipment after receiving the distress signal sent by the fourth sending unit;
the management center device further includes: and the alarm unit is used for sending out an emergency alarm signal.
Preferably, the management center apparatus further includes: the calling unit is used for calling the historical position data of the positioning terminal, the plane view of the ship and the perspective view of the ship after the alarm unit sends out the emergency alarm signal; and the position marking unit is used for marking the historical position of the positioning terminal on a plane view of the ship and a perspective view of the ship respectively and displaying the marked historical position on a screen so as to obtain a historical movement track diagram of the positioning terminal.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, all base stations installed on a ship outwards transmit wireless inquiry signals carrying base station numbers according to preset transmitting frequency, a positioning terminal worn by a crew receives the wireless inquiry signals transmitted by at least one base station, determines the wireless inquiry signal with the strongest signal intensity as a target wireless inquiry signal from the at least one wireless inquiry signal, compares the base station number carried by the target wireless inquiry signal with the base station number carried by the target wireless inquiry signal received by the positioning terminal last time, judges whether the base station numbers are the same or not, if the base station numbers are the same, the position data of the positioning terminal is not changed, the current position data of the positioning terminal is the same as the position data of the positioning terminal at the last moment, and if the base station numbers are different, the positioning terminal sends position inquiry signals to the base station to which the target wireless inquiry signal belongs, calculating position data of a positioning terminal by using the information points included in the base station; through this kind of locate mode can be accurate carry out accurate location to the crew of whole ship, master the dynamics of crew of whole ship in real time, when crew takes place to fall into water danger, just can in time rescue, guarantee crew's life safety.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a method for locating a ship crew according to embodiment 1 of the present invention;
fig. 2 is a block diagram showing a configuration of a ship crew positioning system according to embodiment 2 of the present invention;
fig. 3 is a flowchart of a ship crew positioning method according to embodiment 3 of the present invention;
fig. 4 is a flowchart of a ship crew positioning method according to embodiment 4 of the present invention.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the described embodiments are only some embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any creative effort based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
The embodiment provides a method for positioning ship personnel, as shown in fig. 1, comprising the following steps:
step S101: the base station 10 transmits a wireless inquiry signal; wherein, the wireless inquiry signal carries the number of the base station 10 to which the wireless inquiry signal belongs;
step S102: the positioning terminal 20 worn on the crew receives at least one wireless inquiry signal, and determines the wireless inquiry signal with the strongest signal intensity in the at least one wireless inquiry signal as a target wireless inquiry signal;
step S103: the positioning terminal 20 determines whether the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 at the previous time belongs; if the two are the same, executing the steps S104-S105; if not, executing the steps S106 to S107;
step S104: the positioning terminal 20 sends a position coverage signal to the base station 10 to which the target wireless inquiry signal belongs, so that the base station 10 to which the target wireless inquiry signal belongs sends the position coverage signal to the management center device 30;
step S105: the management center device 30 stores the received latest position data of the positioning terminal 20 as the position data of the positioning terminal 20 at the current time;
step S106: the positioning terminal 20 sends a position query signal and heart rate sign data of a crew to the base station 10 to which the target wireless query signal belongs, so that the information point contained in the base station 10 calculates the position data of the positioning terminal 20, and sends the position data of the positioning terminal 20 and the heart rate sign data of the crew to the management center device 30;
step S107: the management center device 30 stores the position data of the positioning terminal 20 as the position data of the current time of the positioning terminal 20.
In a preferred implementation process, before step S101, the positioning terminal 20 calls the heart rate detection bracelet 40 worn by the crew at a preset calling time; the heart rate detection bracelet 40 sends the detected heart rate physical sign data of the crew to the positioning terminal 20; the positioning terminal 20 stores the received heart rate sign data of the crew member.
In a preferred implementation process, after step S107, the management center device 30 determines whether the heart rate sign data of the crew member is normal; if not, the management center device 30 calls the monitoring video at the current position of the positioning terminal 20 according to the current position data of the positioning terminal 20 to determine the safety of the crew.
In a preferred implementation, the positioning terminal 20 detects whether the internal circuit of the positioning terminal 20 is short-circuited in real time; if yes, the positioning terminal 20 sends a distress signal to at least one base station 10 to which at least one wireless query signal received by the positioning terminal 20 belongs; wherein, the distress signal includes GPS positioning data of the positioning terminal 20; at least one base station 10 receiving the distress signal sends the distress signal to a management center device 30; the management center apparatus 30 issues an emergency alert signal.
In a further preferred implementation, the management center device 30 retrieves historical position data of the positioning terminal 20, a plan view of the ship, and a perspective view of the ship; the management center device 30 marks and displays the historical positions of the positioning terminal 20 on the screen on the plan view of the ship and the perspective view of the ship, respectively, to obtain the historical movement track diagram of the positioning terminal 20.
The method for positioning the ship personnel can accurately position the ship personnel in real time, master the dynamic state of the ship personnel, and timely rescue the ship personnel when the ship personnel is in danger of falling into water, thereby ensuring the life safety of the ship personnel.
Example 2
Embodiment 2 provides a positioning system for ship personnel, which is used for implementing the positioning method for ship personnel described in embodiment 1. As shown in fig. 2, the positioning system for ship personnel includes a base station 10, a positioning terminal 20, and a management center device 30:
the base station 10 includes: a signal transmitting unit 101 for transmitting a wireless inquiry signal; wherein, the wireless inquiry signal carries the number of the base station 10 to which the wireless inquiry signal belongs;
wherein, positioning terminal 20 wears on the marine personnel body, includes: a signal receiving unit 201, configured to receive at least one wireless inquiry signal, and determine a wireless inquiry signal with the strongest signal strength in the at least one wireless inquiry signal as a target wireless inquiry signal; a first judging unit 202, configured to judge whether the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs; a first sending unit 203, configured to send a position coverage signal to the base station 10 to which the target wireless inquiry signal belongs when the first judging unit 202 judges that the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal belongs, which is received by the positioning terminal 20 at the previous time, so that the base station 10 to which the target wireless inquiry signal belongs sends the position coverage signal to the management center device 30;
the management center device 30 includes: a first position storage unit 301, configured to store the received latest position data of the positioning terminal 20 as the current position data of the positioning terminal 20;
the positioning terminal 20 further includes: a second sending unit 204, configured to send a position query signal and heart rate sign data of the crew to the base station 10 to which the target wireless query signal belongs when the first determining unit 202 determines that the number of the base station 10 to which the target wireless query signal belongs is different from the number of the base station 10 to which the target wireless query signal received by the positioning terminal 20 last time belongs, so that the information point included in the base station 10 calculates the position data of the positioning terminal 20, and sends the position data of the positioning terminal 20 and the heart rate sign data of the crew to the management center device 30;
the management center apparatus 30 further includes: a second location storage unit 302, configured to store the location data of the positioning terminal 20 as the location data of the current time of the positioning terminal 20.
In a preferred embodiment, the positioning system for the ship personnel further comprises a heart rate detection bracelet 40:
the positioning terminal 20 further includes: the calling unit 205 is configured to call the heart rate detection bracelet 40 worn by the crew at a preset calling moment before the signal transmitting unit 101 transmits the wireless inquiry signal;
wherein, the rhythm of the heart detects bracelet 40 includes: a third sending unit 401, configured to send the detected heart rate sign data of the crew to the positioning terminal 20;
the positioning terminal 20 further includes: and the data storage unit 206 is used for storing the received heart rate sign data of the crew member.
In a preferred embodiment, the management center device 30 further includes: a second determining unit 303, configured to determine whether the heart rate sign data of the crew is normal after the second position storage unit 302 stores the position data of the positioning terminal 20 as the position data of the positioning terminal 20 at the current time; the monitoring calling unit 304 is configured to, when the second determining unit 303 determines that the heart rate sign data of the crew is abnormal, call the monitoring video at the current position of the positioning terminal 20 according to the current position data of the positioning terminal 20, so as to determine the safety of the crew.
In a preferred embodiment, the positioning terminal 20 further includes: a detection unit 207, configured to detect whether an internal circuit of the positioning terminal 20 is short-circuited in real time; a fourth sending unit 208, configured to send a distress signal to at least one base station 10 to which at least one wireless query signal received by the positioning terminal 20 belongs when the detecting unit 207 detects that the internal circuit of the positioning terminal 20 is short-circuited; wherein, a GPS positioning device is arranged in the positioning terminal 20, and the distress signal includes GPS positioning data of the positioning terminal 20;
the base station 10 further includes: a fifth sending unit 102, configured to send the distress signal to the management center device 30 after receiving the distress signal sent by the fourth sending unit 208;
the management center apparatus 30 further includes: an alarm unit 305 for issuing an emergency alarm signal.
In a preferred embodiment, the management center device 30 further includes: a retrieving unit 306 for retrieving the historical position data of the positioning terminal 20, a plan view of the ship, and a perspective view of the ship after the alarm unit 305 issues the emergency alarm signal; a position marking unit 307, configured to mark and display the historical positions of the positioning terminal 20 on a plan view of the ship and a perspective view of the ship, respectively, on a screen to obtain a historical movement track diagram of the positioning terminal 20.
It should be noted that, the positioning system for ship personnel described in this embodiment corresponds to the positioning method in embodiment 1, and a specific implementation process thereof is described in detail in embodiment 1, and is not described herein again.
Example 3
The embodiment provides another method for positioning ship personnel, as shown in fig. 3, including the following steps:
step S301: the positioning terminal 20 calls a heart rate detection bracelet 40 worn by a crew at a preset calling moment;
in the embodiment of the invention, each crew member on the ship wears an exclusive bracelet, a heart rate detection sensor is arranged in each bracelet and used for detecting heart rate sign data of the crew member, a positioning terminal 20 is also arranged in each bracelet, the positioning terminal 20 and the heart rate detection sensor can be communicated with each other, the crew member can set a time interval between two adjacent times when the positioning terminal 20 calls the heart rate detection sensor after wearing the bracelet, the set time interval is required to be ensured not to exceed 30 minutes, the time interval can be set to be 1 minute, and the time interval can also be set to be 5 minutes;
step S302: the heart rate detection bracelet 40 sends the detected heart rate physical sign data of the crew to the positioning terminal 20;
in the embodiment of the present invention, after the heart rate detection bracelet 40 receives the call signal sent by the positioning terminal 20, the heart rate sign data of the crew, which is detected by the heart rate detection sensor in real time, is obtained and sent to the positioning terminal 20;
step S303: the positioning terminal 20 stores the received heart rate sign data of the crew;
in the embodiment of the invention, after receiving the heart rate sign data of the crew, which is sent by the heart rate detection bracelet 40, the positioning terminal 20 stores the heart rate sign data of the crew, and after the positioning terminal 20 calls the heart rate detection bracelet 40 next time and obtains the latest heart rate sign data of the crew, the positioning terminal 20 updates the stored heart rate sign data of the crew to the received latest heart rate sign data of the crew, so that the heart rate sign data of the crew, which is stored by the positioning terminal 20, is always the latest heart rate sign data of the crew, and thus the crew can timely know and take rescue actions when the heart rate sign data of the crew is abnormal;
step S304: the base station 10 transmits a wireless inquiry signal;
in the embodiment of the invention, the wireless inquiry signal carries the number of the base station 10 to which the wireless inquiry signal belongs; the ship is provided with a plurality of base stations 10, specifically, the base stations 10 are arranged on a deck of the ship, and as the area of the deck is large, the positioning of crews needs to be accurate, a plurality of base stations 10 are uniformly distributed on the deck of the ship and each base station 10 comprises 3 information points, so that the deck of the ship can be completely covered by the base stations 10, when the crews are positioned, the base stations 10 can adopt a 3-point method or a 4-point method, and the accurate positioning data of the crews can be obtained by ranging through a phase or pulse method, and the positioning error can be controlled below 10cm by the positioning mode, so that the positioning accuracy is improved; the base station 10 is arranged in the cabin of the ship, and because the space of the cabin is smaller, only a crew is required to be determined to be in a room to accurately position the crew, only one base station 10 is required to be arranged in each cabin, the base stations 10 arranged in the cabins only comprise 1 information point, different base station information points are arranged at different positions on the ship, all places of the ship can be comprehensively covered, and the crew can be accurately positioned by using the information points of the base stations 10 most reasonably;
optionally, all the base stations 10 on the ship uninterruptedly transmit the wireless query signals, the range of the wireless query signals transmitted by the base stations 10 is fixed, and a crew can receive the wireless query signals transmitted by at least one base station 10 at any position of the ship, so that the real-time position of the crew can be ensured to be mastered, and management is facilitated;
step S305: the positioning terminal 20 worn on the crew receives at least one wireless inquiry signal, and determines the wireless inquiry signal with the strongest signal intensity in the at least one wireless inquiry signal as a target wireless inquiry signal;
in the embodiment of the present invention, the positioning terminal 20 receives the wireless query signals transmitted by all the base stations 10 covering the positioning terminal 20, but the signal strengths of at least one of the received wireless query signals are different, and the positioning terminal needs to determine that the wireless query signal with the strongest signal is the target wireless query signal, so that the base station 10 transmitting the target wireless query signal is the base station 10 closest to the positioning terminal 20, and the position data of the positioning terminal 20 calculated by the information points of the base station 10 is the most accurate;
step S306: the positioning terminal 20 determines whether the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 at the previous time belongs; if yes, executing steps S307-S308; if not, executing the step S309-step S311;
in the embodiment of the present invention, the purpose of the positioning terminal 20 determining whether the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs is to determine whether the positioning terminal 20 has moved the position, if it is determined that the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs, it indicates that the position of the positioning terminal 20 has not changed, and if it is determined that the number of the base station 10 to which the target wireless inquiry signal belongs is not the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs, it indicates that the position of the positioning terminal 20 has changed, and the base station 10 is required to reposition the position of the positioning terminal 20;
step S307: the positioning terminal 20 sends a position coverage signal to the base station 10 to which the target wireless inquiry signal belongs, so that the base station 10 to which the target wireless inquiry signal belongs sends the position coverage signal to the management center device 30;
in the embodiment of the present invention, the location coverage signal is used to indicate that the location of the positioning terminal 20 has not changed, and when the base station 20 to which the target wireless query signal belongs receives the location coverage signal, the base station directly sends the location coverage signal to the management center device 30, so that the management center device 30 stores the location data of the positioning terminal 20 that was stored last time as the current location data of the positioning terminal 20;
step S308: the management center device 30 stores the received latest position data of the positioning terminal 20 as the position data of the positioning terminal 20 at the current time;
step S309: the positioning terminal 20 sends a position query signal and the heart rate sign data of the crew to the base station 10 to which the target wireless query signal belongs, so that the information point contained in the base station 10 calculates the position data of the positioning terminal 20, and sends the position data of the positioning terminal 20 and the heart rate sign data of the crew to the management center device 30;
in the embodiment of the present invention, when the position of the positioning terminal 20 moves, the positioning terminal 20 determines that it enters a new area, and then sends a position query signal to the base station 10 to which the target wireless query signal belongs, so that the information point of the base station 10 to which the target wireless query signal belongs calculates the position data of the positioning terminal 20, determines the position of the positioning terminal 20, and further determines whether the crew member to which the positioning terminal 20 belongs is in a safe range;
optionally, since the positioning terminal 20 enters a new area, it needs to further determine whether the positioning terminal 20 is safe after entering the new area, at this time, it needs to send a position coverage signal to the base station 10 to which the target wireless inquiry signal belongs and send the heart rate sign data of the crew to the base station 10 to which the target wireless inquiry signal belongs, and then the base station 10 to which the target wireless inquiry signal belongs sends the heart rate sign data of the crew to the management center device 30, and the management center device 30 further determines whether the received heart rate sign data of the crew is normal, so that the safety condition of the crew can be monitored in real time during the movement of the crew, the life safety of the crew is ensured, and if the crew is dangerous after entering the new area, the monitoring personnel can also know and perform rescue in time, and the life safety of the crew is ensured to a great extent, meanwhile, the safety coefficient of the ship going out of the sea is also improved;
step S310: the management center device 30 stores the position data of the positioning terminal 20 as the position data of the positioning terminal 20 at the current time;
step S311: the management center device 30 judges whether the heart rate sign data of the crew is normal; if not, go to step S312; if yes, ending the process;
in the embodiment of the invention, the normal range of the heart rate physical sign data is 60-100 times per minute, the management center device 30 can judge whether the heart rate physical sign data of the crew is in the normal range after receiving the heart rate physical sign data of the crew, if the heart rate physical sign data of the crew is in the normal range, the crew is safe, and if the heart rate physical sign data of the crew is not in the normal range, the reason that the heart rate physical sign data of the crew is abnormal needs to be further judged, so that the situation that the crew is dangerous and cannot be rescued at the first time is effectively avoided, and the life safety of the crew is guaranteed;
step S312: the management center device 30 calls the monitoring video at the current position of the positioning terminal 20 according to the current position data of the positioning terminal 20 to determine the safety of the crew.
In the embodiment of the present invention, when determining that the abnormal condition of the heart rate sign data of the crew occurs, the management center device 30 calls the monitoring video of the position where the crew is located, and determines, by checking the monitoring video, whether the reason that the abnormal condition of the heart rate sign data of the crew occurs is that the crew is in danger or a bracelet worn by the crew is abnormal, and if it is found that the crew does not have danger after checking the monitoring video, it may be determined that the bracelet worn by the crew is in failure, and at this time, the management center device 30 may contact the crew urgently, so that a maintenance worker maintains the bracelet of the crew, so as to ensure that the bracelet worn by the crew can detect the heart rate sign data of the crew normally, thereby facilitating the management worker to monitor the vital signs of the crew through the management center device 30, and ensuring that the life safety of the crew is not threatened.
Example 4
The embodiment provides another method for positioning ship personnel, as shown in fig. 4, which adds some steps compared with embodiment 3, and specifically includes the following steps:
step S401: the positioning terminal 20 calls a heart rate detection bracelet 40 worn by a crew at a preset calling moment;
in the embodiment of the invention, each crew member on the ship wears an exclusive bracelet, a heart rate detection sensor is arranged in each bracelet and used for detecting heart rate sign data of the crew member, a positioning terminal 20 is also arranged in each bracelet, the positioning terminal 20 and the heart rate detection sensor can be communicated with each other, the crew member can set a time interval between two adjacent times when the positioning terminal 20 calls the heart rate detection sensor after wearing the bracelet, the set time interval is required to be ensured not to exceed 30 minutes, the time interval can be set to be 1 minute, and the time interval can also be set to be 5 minutes;
step S402: the heart rate detection bracelet 40 sends the detected heart rate physical sign data of the crew to the positioning terminal 20;
step S403: the positioning terminal 20 stores the received heart rate sign data of the crew;
in the embodiment of the invention, after receiving the heart rate sign data of the crew, which is sent by the heart rate detection bracelet 40, the positioning terminal 20 stores the heart rate sign data of the crew, and after the positioning terminal 20 calls the heart rate detection bracelet 40 next time and obtains the latest heart rate sign data of the crew, the positioning terminal 20 updates the stored heart rate sign data of the crew to the received latest heart rate sign data of the crew, so that the heart rate sign data of the crew, which is stored by the positioning terminal 20, is always the latest heart rate sign data of the crew, and thus the crew can timely know and take rescue actions when the heart rate sign data of the crew is abnormal;
step S404: the base station 10 transmits a wireless inquiry signal;
in the embodiment of the invention, the wireless inquiry signal carries the number of the base station 10 to which the wireless inquiry signal belongs; the ship is provided with a plurality of base stations 10, specifically, the base stations 10 are arranged on a deck of the ship, and as the area of the deck is large, the positioning of crews needs to be accurate, a plurality of base stations 10 are uniformly distributed on the deck of the ship and each base station 10 comprises 3 information points, so that the deck of the ship can be completely covered by the base stations 10, when the crews are positioned, the base stations 10 can adopt a 3-point method or a 4-point method, and the accurate positioning data of the crews can be obtained by ranging through a phase or pulse method, and the positioning error can be controlled below 10cm by the positioning mode, so that the positioning accuracy is improved; the base station 10 is arranged in the cabin of the ship, and because the space of the cabin is smaller, only a crew is required to be determined to be in a room to accurately position the crew, only one base station 10 is required to be arranged in each cabin, the base stations 10 arranged in the cabins only comprise 1 information point, different base station information points are arranged at different positions on the ship, all places of the ship can be comprehensively covered, and the crew can be accurately positioned by using the information points of the base stations 10 most reasonably;
optionally, all the base stations 10 on the ship uninterruptedly transmit the wireless query signals, the range of the wireless query signals transmitted by the base stations 10 is fixed, and a crew can receive the wireless query signals transmitted by at least one base station 10 at any position of the ship, so that the real-time position of the crew can be ensured to be mastered, and management is facilitated;
step S405: the positioning terminal 20 worn on the crew receives at least one wireless inquiry signal, and determines the wireless inquiry signal with the strongest signal intensity in the at least one wireless inquiry signal as a target wireless inquiry signal; in the embodiment of the present invention, the positioning terminal 20 receives the wireless query signals transmitted by all the base stations 10 covering the positioning terminal 20, but the signal strengths of at least one of the received wireless query signals are different, and the positioning terminal needs to determine that the wireless query signal with the strongest signal is the target wireless query signal, so that the base station 10 transmitting the target wireless query signal is the base station 10 closest to the positioning terminal 20, and the position data of the positioning terminal 20 calculated by the information points of the base station 10 is the most accurate;
step S406: the positioning terminal 20 determines whether the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 at the previous time belongs; if yes, executing steps S407 to S408; if not, executing the step S409 to the step S411;
in the embodiment of the present invention, the purpose of the positioning terminal 20 determining whether the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs is to determine whether the positioning terminal 20 has moved the position, if it is determined that the number of the base station 10 to which the target wireless inquiry signal belongs is the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs, it indicates that the position of the positioning terminal 20 has not changed, and if it is determined that the number of the base station 10 to which the target wireless inquiry signal belongs is not the same as the number of the base station 10 to which the target wireless inquiry signal received by the positioning terminal 20 last time belongs, it indicates that the position of the positioning terminal 20 has changed, and the base station 10 is required to reposition the position of the positioning terminal 20;
step S407: the positioning terminal 20 sends a position coverage signal to the base station 10 to which the target wireless inquiry signal belongs, so that the base station 10 to which the target wireless inquiry signal belongs sends the position coverage signal to the management center device 30;
in the embodiment of the present invention, the location coverage signal is used to indicate that the location of the positioning terminal 20 has not changed, and when the base station 10 to which the target wireless query signal belongs receives the location coverage signal, the location coverage signal is directly sent to the management center device 30, so that the management center device 30 stores the location data of the positioning terminal 20 that was stored last time as the current location data of the positioning terminal 20;
step S408: the management center device 30 stores the received latest position data of the positioning terminal 20 as the position data of the positioning terminal 20 at the current time;
step S409: the positioning terminal 20 sends a position query signal and the heart rate sign data of the crew to the base station 10 to which the target wireless query signal belongs, so that the information point contained in the base station 10 calculates the position data of the positioning terminal 20, and sends the position data of the positioning terminal 20 and the heart rate sign data of the crew to the management center device 30;
in the embodiment of the present invention, when the position of the positioning terminal 20 moves, the positioning terminal 20 determines that it enters a new area, and at this time, it sends a position query signal to the base station 10 to which the target wireless query signal belongs, so that the information point of the base station 10 to which the target wireless query signal belongs calculates the position data of the positioning terminal 20, determines that the position of the positioning terminal 20 is on the ship, and further determines whether the crew of the positioning terminal 20 is in the safety range;
optionally, since the positioning terminal 20 enters a new area, it needs to further determine whether the positioning terminal 20 is safe after entering the new area, at this time, it needs to send a position coverage signal to the base station 10 to which the target wireless inquiry signal belongs and send the heart rate sign data of the crew to the base station 10 to which the target wireless inquiry signal belongs, and then the base station 10 to which the target wireless inquiry signal belongs sends the heart rate sign data of the crew to the management center device 30, and the management center device 30 further determines whether the received heart rate sign data of the crew is normal, so that the safety condition of the crew can be monitored in real time during the movement of the crew, the life safety of the crew is ensured, and if the crew is dangerous after entering the new area, the monitoring personnel can also know and perform rescue in time, and the life safety of the crew is ensured to a great extent, meanwhile, the safety coefficient of the ship going out of the sea is also improved;
step S410: the management center device 30 stores the position data of the positioning terminal 20 as the position data of the positioning terminal 20 at the current time;
step S411: the management center device 30 judges whether the heart rate sign data of the crew is normal; if not, executing the steps S412 to S413; if yes, ending the process;
in the embodiment of the invention, the normal range of the heart rate physical sign data is 60-100 times per minute, the management center device 30 can judge whether the heart rate physical sign data of the crew is in the normal range after receiving the heart rate physical sign data of the crew, if the heart rate physical sign data of the crew is in the normal range, the crew is safe, and if the heart rate physical sign data of the crew is not in the normal range, the reason that the heart rate physical sign data of the crew is abnormal needs to be further judged, so that the situation that the crew is dangerous and cannot be rescued at the first time is effectively avoided, and the life safety of the crew is guaranteed;
step S412: the management center device 30 calls the monitoring video at the current position of the positioning terminal 20 according to the position data of the positioning terminal 20 at the current moment to determine the safety of the crew;
in the embodiment of the invention, when determining that abnormal heart rate sign data of a crew occurs, the management center device 30 calls a monitoring video of the position where the crew is located, and determines whether the reason that the abnormal heart rate sign data of the crew occurs is that the crew has a life risk or a bracelet worn by the crew has an abnormality by checking the monitoring video, if the crew is not found to have a life risk after checking the monitoring video, the bracelet worn by the crew is determined to have a fault, and at this time, the management center device 30 can contact the crew urgently, so that a maintenance worker can maintain the bracelet of the crew, the bracelet worn by the crew can be ensured to detect the heart rate sign data of the crew normally, the management worker can monitor the vital signs of the crew through the management center device 30 more conveniently, and the life safety of the crew is ensured not to be threatened;
step S413: the positioning terminal 20 detects whether the internal circuit of the positioning terminal 20 is short-circuited in real time; if yes, executing steps S414-S418; if not, ending the process;
in the embodiment of the invention, when a crew falls into water, the internal circuit of the positioning terminal 20 worn by the crew is corroded by seawater to generate electrode short circuit, so that whether the crew falls into water can be determined by judging whether the internal circuit board of the positioning terminal 20 generates short circuit;
step S414: the positioning terminal 20 sends a distress signal to at least one base station 10 to which at least one wireless inquiry signal received by the positioning terminal 20 belongs;
in the embodiment of the invention, a GPS positioning device is installed in a bracelet worn by a crew, after the crew falls into water, because the crew is far away from a ship, a base station 10 installed on the ship cannot accurately position the crew, and at this time, the crew is positioned by the GPS positioning device in the bracelet worn by the crew, and when the positioning terminal 20 determines that the crew falls into water, a distress signal is sent out and comprises GPS positioning data of the positioning terminal 20;
step S415: at least one base station 10 receiving the distress signal sends the distress signal to a management center device 20;
step S416: the management center apparatus 30 transmits an emergency alert signal;
step S417: the management center device 30 retrieves the historical position data of the positioning terminal 20, a plan view of the ship, and a perspective view of the ship;
in the embodiment of the invention, after the management center device 30 receives the call for help signal, the emergency alarm signal is immediately sent out, so that the manager arranges rescue workers to rescue the ship man falling into the water at sea, the management center device 30 can call the historical position data of the ship man falling into the water, the plane view of the ship and the three-dimensional view of the ship while sending out the emergency alarm signal, mark the historical position of the ship man falling into the water on the plane view and the three-dimensional view of the ship, then display the ship view marked with the historical position of the ship man falling into the water on the screen of the management center device 30 for the rescue workers to check, and through checking the ship view marked with the historical position of the ship man falling into the water, the rescue workers can more quickly find the ship man falling into the water, thereby improving the rescue efficiency and ensuring the life safety of the ship man falling into the water;
step S418: the management center device 30 marks and displays the historical positions of the positioning terminal 20 on the screen on the plan view of the ship and the perspective view of the ship, respectively, to obtain the historical movement track diagram of the positioning terminal 20.
In summary, according to the embodiments, the position data of the positioning terminal 20 is calculated through the base station information points, so that the accuracy of positioning the positioning terminal 20 is improved, and the real-time dynamic grasp of the ship-wide personnel is realized; whether the crew is in life danger or not can be judged by detecting the heart rate sign data of the crew, so that rescue workers can rescue in time, and the life safety of the crew is guaranteed; the positioning terminal 20 can send a distress signal at the moment when the crew falls into the water, so that the crew falling into the water can be rescued in time, the rescue efficiency is improved, and the life safety of the crew is guaranteed; the safety of the ship going out of the sea is improved overall.
Claims (11)
1. A method for locating ship personnel, which is characterized by comprising the following steps:
s1, a base station (10) transmits a wireless query signal; wherein the wireless inquiry signal carries the number of the base station (10) to which the wireless inquiry signal belongs;
a plurality of base stations (10) are installed on the ship;
s2, a positioning terminal (20) worn on a crew receives at least one wireless query signal, and determines the wireless query signal with the strongest signal strength in the at least one wireless query signal as a target wireless query signal;
s3, the positioning terminal (20) judges whether the number of the base station (10) to which the target wireless inquiry signal belongs is the same as the number of the base station (10) to which the target wireless inquiry signal received by the positioning terminal (20) at the previous time belongs; if the two are the same, executing steps S311-S312; if not, executing steps S321-S322;
s311, the positioning terminal (20) sends a position coverage signal to the base station (10) to which the target wireless inquiry signal belongs, so that the base station (10) to which the target wireless inquiry signal belongs sends the position coverage signal to a management center device (30);
s312, the management center equipment (30) stores the received latest position data of the positioning terminal (20) as the position data of the positioning terminal (20) at the current moment;
s321, the positioning terminal (20) sends a position query signal and the heart rate sign data of the crew to the base station (10) to which the target wireless query signal belongs, so that information points contained in the base station (10) calculate the position data of the positioning terminal (20), and send the position data of the positioning terminal (20) and the heart rate sign data of the crew to the management center device (30);
s322, the management center equipment (30) stores the position data of the positioning terminal (20) as the position data of the positioning terminal (20) at the current moment.
2. A method for locating ship personnel according to claim 1, characterized in that a plurality of base stations (10) are uniformly installed on the deck of the ship, and each base station (10) comprises 3 information points, so that the deck of the ship can be fully covered by the base station (10); a base station (10) is installed in each cabin, and the base stations (10) installed in the cabins only contain 1 information point, so that accurate positioning of crews is achieved.
3. A method as claimed in claim 1, wherein before said base station (10) transmits a wireless interrogation signal, the method further comprises the steps of:
the positioning terminal (20) calls a heart rate detection bracelet (40) worn by a crew at a preset calling moment;
the heart rate detection bracelet (40) sends the detected heart rate sign data of the crew member to the positioning terminal (20);
and the positioning terminal (20) stores the received heart rate sign data of the crew member.
4. The method for locating ship personnel according to claim 1, wherein the management center device (30) stores the position data of the locating terminal (20) as the position data of the locating terminal (20) at the current time, and further comprises the following steps:
the management center equipment (30) judges whether the heart rate sign data of the crew is normal or not;
and if the ship crew is abnormal, the management center equipment (30) calls the monitoring video at the current position of the positioning terminal (20) according to the position data of the positioning terminal (20) at the current moment so as to determine the safety of the ship crew.
5. A method for locating ship personnel according to any one of claims 1 to 4, further comprising the steps of:
the positioning terminal (20) detects whether an internal circuit of the positioning terminal (20) is short-circuited in real time;
if yes, the positioning terminal (20) sends a distress signal to at least one base station (10) to which at least one wireless inquiry signal received by the positioning terminal (20) belongs;
wherein the distress signal comprises GPS positioning data of the positioning terminal (20);
at least one base station (10) receiving the distress signal sends the distress signal to the management center equipment (30);
the management center apparatus (30) issues an emergency alert signal.
6. Method for locating ship personnel according to claim 5, characterized in that after the emergency alert signal is issued by the management center device (30), it further comprises the following steps:
the management center equipment (30) retrieves historical position data of the positioning terminal (20), a plan view of a ship and a perspective view of the ship;
the management center equipment (30) marks the historical positions of the positioning terminals (20) on a plane view of a ship and a perspective view of the ship respectively and displays the marked historical positions on a screen to obtain a historical movement track diagram of the positioning terminals (20).
7. A marine personnel positioning system is characterized by comprising a base station (10), a positioning terminal (20) and a management center device (30): wherein a plurality of base stations (10) are installed on the ship; the base station (10) comprises:
a signal transmitting unit (101) for transmitting a wireless inquiry signal; wherein the wireless inquiry signal carries the number of the base station (10) to which the wireless inquiry signal belongs;
wherein, positioning terminal (20) wears on the marine personnel body, includes:
a signal receiving unit (201) for receiving at least one wireless inquiry signal and determining a wireless inquiry signal with the strongest signal strength in the at least one wireless inquiry signal as a target wireless inquiry signal;
a first judging unit (202) for judging whether the number of the base station (10) to which the target wireless inquiry signal belongs is the same as the number of the base station (10) to which the target wireless inquiry signal received by the positioning terminal (20) last time belongs;
a first sending unit (203) for sending a position coverage signal to the base station (10) to which the target wireless inquiry signal belongs when the first judging unit (202) judges that the number of the base station (10) to which the target wireless inquiry signal belongs is the same as the number of the base station (20) to which the target wireless inquiry signal belongs received by the positioning terminal (20) last time, so that the base station (10) to which the target wireless inquiry signal belongs sends the position coverage signal to a management center device (30);
wherein the management center apparatus (30) includes:
a first position storage unit (301) for storing the latest received position data of the positioning terminal (20) as the current position data of the positioning terminal (20);
the positioning terminal (20) further comprises:
a second sending unit (204), configured to send a position query signal and heart rate sign data of a crew to the base station (10) to which the target wireless query signal belongs when the first determining unit (202) determines that the number of the base station (10) to which the target wireless query signal belongs is different from the number of the base station (10) to which the target wireless query signal belongs, which is received by the positioning terminal (20) last time, so that information points included in the base station (10) calculate the position data of the positioning terminal (20), and send the position data of the positioning terminal (20) and the heart rate sign data of the crew to the management center device (30);
the management center apparatus (30) further includes:
and a second position storage unit (302) for storing the position data of the positioning terminal (20) as the position data of the positioning terminal (20) at the current time.
8. Marine vessel crew positioning system according to claim 7, further comprising a heart rate detection bracelet (40): the positioning terminal (20) further comprises:
the calling unit (205) is used for calling the heart rate detection bracelet (40) worn by the crew at a preset calling moment before the signal transmitting unit (101) transmits the wireless inquiry signal;
wherein the heart rate detection bracelet (40) comprises:
a third sending unit (401) for sending the detected heart rate sign data of the crew member to the positioning terminal (20);
the positioning terminal (20) further comprises:
and the data storage unit (206) is used for storing the received heart rate sign data of the crew member.
9. A marine personnel localization system according to claim 8, wherein said management center device (30) further comprises:
a second judging unit (303) configured to judge whether the heart rate sign data of the crew is normal after the second position storage unit (302) stores the position data of the positioning terminal (20) as the position data of the positioning terminal (20) at the current time;
and the monitoring and calling unit (304) is configured to call the monitoring video at the current position of the positioning terminal (20) according to the position data of the positioning terminal (20) at the current moment when the second judging unit (303) judges that the heart rate physical sign data of the crew is abnormal, so as to determine the safety of the crew.
10. Marine vessel crew positioning system according to claim 7, wherein the positioning terminal (20) further comprises:
the detection unit (207) is used for detecting whether the internal circuit of the positioning terminal (20) is short-circuited in real time;
a fourth sending unit (208) for sending a distress signal to at least one base station (10) to which at least one wireless inquiry signal received by the positioning terminal (20) belongs when the detecting unit (207) detects that the internal circuit of the positioning terminal (20) is short-circuited;
the positioning terminal (20) is provided with a GPS positioning device, and the distress signal comprises GPS positioning data of the positioning terminal (20);
the base station (10) further comprises: a fifth sending unit (102) for sending the distress signal to the management center equipment (30) after receiving the distress signal sent by the fourth sending unit (208);
the management center apparatus (30) further includes: an alarm unit (305) for issuing an emergency alarm signal.
11. A marine personnel localization system according to claim 10, wherein said management center device (30) further comprises:
a retrieving unit (306) for retrieving the historical position data of the positioning terminal (20), a plan view of the ship and a perspective view of the ship after the alarm unit (305) issues an emergency alarm signal;
and the position marking unit (307) is used for marking the historical position of the positioning terminal (20) on a plane view of a ship and a perspective view of the ship respectively and displaying the marked historical position on a screen so as to obtain a historical movement track diagram of the positioning terminal (20).
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| CN201810737644.7A CN109143158B (en) | 2018-07-06 | 2018-07-06 | Ship personnel positioning method and system |
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| CN201810737644.7A CN109143158B (en) | 2018-07-06 | 2018-07-06 | Ship personnel positioning method and system |
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