An underwater emergency rescue support system

Abstract

This invention discloses an underwater emergency rescue support system, integrating underwater location measurement equipment, a distress call wristband and its synchronization base, multi-channel synchronization equipment, and a surface monitoring center to jointly construct a highly efficient life safety protection network. The core of the system lies in utilizing GPS second-pulse synchronization technology and underwater acoustic communication to achieve precise monitoring of the location and physiological state of underwater personnel. When an anomaly is detected or a distress signal is received, the system can respond rapidly, calculating the location of the person in distress through the underwater location measurement equipment and transmitting the information to the surface monitoring center in real time, activating the emergency rescue procedure. The entire system employs advanced signal processing technology and a waterproof design, ensuring stability and reliability in extreme environments, thereby greatly improving the speed and efficiency of underwater rescue operations.

Description

Technical Field

[0001] This invention relates to the field of underwater rescue equipment technology, specifically an underwater emergency rescue support system. Background Technology

[0002] With the increasing number of lake and sea recreational areas, swimming and diving accidents during these activities are also frequent. In the event of a drowning accident, the victim typically sinks within 3 minutes and dies within 5-10 minutes; this is known as the "golden 5 minutes" for rescue. Therefore, the earlier a drowning person is discovered, the greater their chances of survival. Currently, rescue signals are primarily relayed through video surveillance equipment, sightings by bystanders, and the drowning person's cries for help. Once a rescuer spots the victim, they travel by speedboat to the location. With technological advancements, new technologies such as remotely controlled unmanned surface vessels and drones for deploying rescue equipment are also being used to achieve more efficient and rapid rescues.

[0003] While a drowning victim is on the surface, their location can be determined visually. However, once the victim sinks underwater, a significant amount of time is spent searching, reducing rescue efficiency. This is especially true during accidents occurring while diving, underwater exploration, construction, or search operations, where it becomes extremely difficult to send distress signals in a timely manner.

[0004] Furthermore, underwater divers require frequent underwater training, often pushing the limits of human endurance. While they have safety equipment during pool training, portable safety devices are lacking during near-shore training. Therefore, obtaining real-time location and vital signs information of the divers' teams to ensure their safety is crucial. Patent "CN210427786U" discloses a "rescue underwater acoustic positioning beacon," which features underwater acoustic communication positioning capabilities. In the event of an accident, it can actively or passively send underwater acoustic positioning signals and has two-way voice communication capabilities, enabling two-way voice communication between surface rescue forces and the submarine. This device is primarily used to support submarine rescue missions, requiring deep-water operation capabilities. The device is complex and large, making it unsuitable for individual installation.

[0005] Underwater rescue differs from other rescue operations, requiring extremely high efficiency. However, due to the difficulty in accurately locating underwater distressed individuals, underwater search and rescue is extremely challenging. Furthermore, underwater personnel lack universal rescue equipment. Therefore, key issues that urgently need to be addressed in underwater emergency rescue include how rescuers can send distress signals to others in the first instance, how rescuers can obtain real-time location information of rescuers underwater, how onshore personnel can obtain real-time vital signs information of underwater workers, and how to automatically call for help in case of sudden accidents during underwater operations. Summary of the Invention

[0006] To address the shortcomings of the existing technologies, the inventors further designed and researched a system utilizing underwater acoustic communication, ultra-short baseline positioning, and multi-sensor information fusion technology. This system uses a rescue bracelet to collect vital signs, depth information, and emergency call information from the person underwater. The collected information is then transmitted to an underwater location measurement device via underwater acoustic communication. This device uses ultra-short baseline positioning technology to obtain the underwater person's location and vital signs, and finally transmits the underwater person's status information to the surface monitoring center.

[0007] Specifically, this invention provides an underwater emergency rescue support system, comprising an underwater position measurement device, a distress call bracelet, a distress call bracelet synchronization base, a multi-channel synchronization device, and a surface monitoring center. Both the multi-channel synchronization device and the underwater position measurement device are connected to the surface monitoring center. The multi-channel synchronization device can connect to multiple distress call bracelet synchronization bases and perform GPS second-pulse synchronization on multiple distress call bracelets. The underwater position measurement device can receive underwater acoustic communication status information sent by the distress call bracelets and simultaneously measure the location information of the distress call bracelets. When a distress call bracelet transmits a distress signal, the underwater position measurement device can send the received warning information and calculated location information to the surface monitoring center, which then issues an alarm through an early warning device to quickly alert rescue personnel.

[0008] The underwater position measurement equipment includes an ultra-short baseline array, a left end cover of a watertight cylinder, a signal acquisition, output, and processing circuit, a watertight cylinder, a battery, a right end cover of a watertight cylinder, a transmitting transducer, and a watertight communication cable. The ultra-short baseline array is installed on the outside of the left end cover of the watertight cylinder, and the signal acquisition, output, and processing circuit is installed on the inside of the left end cover of the watertight cylinder. The transmitting transducer is installed on the outside of the right end cover of the watertight cylinder and is connected to the watertight communication cable by a sulfuric acid seal. The battery is installed on the inside of the right end cover of the watertight cylinder. The watertight communication cable connects the signal acquisition, output, and processing circuit to the surface monitoring center. The internal electronic components are sealed by the watertight cylinder and the left and right end covers of the watertight cylinder.

[0009] The signal acquisition and output processing circuit has the function of receiving GPS second pulse synchronization. The signal acquisition and output processing circuit can actively transmit underwater acoustic coded signals. Through the signal processing unit, it encodes the control commands issued by the water surface monitoring center to form underwater acoustic modulation signals, then converts the analog modulation signals into PWM digital modulation signals, amplifies the signals through digital power amplifiers, and finally uses a transmitting transducer to send the control commands to the distress call bracelet, which can be used to urgently recall personnel wearing the distress call bracelet or to transmit work task orders.

[0010] The ultra-short baseline array receives the status information sent by the distress call bracelet, filters and amplifies it, and then performs A / D conversion. The signal processing unit decodes the received signal to calculate the depth, vital signs, and distress signal sent by the distress call bracelet. Simultaneously, it performs position calculation, using the ultra-short baseline positioning principle to calculate the distress call bracelet's orientation relative to itself, and then uses synchronous ranging technology to calculate the distance information of the distress call bracelet relative to itself. Finally, it uses attitude sensor data, geomagnetic sensor data, and GPS data for data fusion processing to obtain the final geographic coordinates of the distress call bracelet.

[0011] The underwater position measuring device has two main operating modes: active tracking mode and emergency receiving mode.

[0012] In active tracking and monitoring mode, the distress call bracelet periodically sends location signals. Underwater location measurement equipment calculates the underwater personnel's location information in real time and transmits it to the monitoring center. In emergency reception mode, the distress call bracelet only sends a location signal when a distress call is triggered. The underwater location measurement equipment will trigger an alert upon receiving the distress signal.

[0013] The distress call bracelet includes a distress call bracelet base, a button, a vital signs monitoring module mounting slot, a distress call bracelet sealing cylinder, a transceiver, a rechargeable battery, a signal generation and processing circuit, a distress call bracelet transparent end cap, a limiting boss, a depth sensor, a charging input positive terminal, a charging input negative terminal, a power supply positive terminal, a power supply negative terminal, a battery positive terminal, a battery negative terminal, an LED display screen, an infrared pair, an LED indicator light, and a magnetic induction switch.

[0014] The distress call bracelet base is used to secure the distress call bracelet to the arm. A button is installed on the side of the base, and a vital signs monitoring module mounting slot is located in the center. The distress call bracelet sealing cylinder is installed on top of the base. Inside the sealing cylinder is a transceiver integrated unit, which is in close contact with the inner wall of the cylinder, with sound-permeable material filling the space between it and the inner wall. The sealing cylinder is made of aluminum alloy or other metal sound-permeable material to ensure good sound transmission. A rechargeable battery and signal generation and processing circuitry are installed inside the transceiver integrated unit.

[0015] An O-ring is used to seal the connection between the emergency call bracelet sealing cylinder and the transparent end cap of the emergency call bracelet.

[0016] The transparent end cap of the emergency call bracelet is made of plexiglass or other transparent hard material. It has a limit protrusion on its left side and is equipped with a depth sensor, a positive charging input terminal, and a negative charging input terminal.

[0017] The signal generation and processing circuit is equipped with a positive power supply terminal, a negative power supply terminal, an LED display screen, and an infrared photodiode at its top. The charging input positive terminal, the power supply positive terminal, and the battery positive terminal are coaxial, as are the charging input negative terminal, the power supply negative terminal, and the battery negative terminal.

[0018] The signal generation and processing circuit has a charge and discharge management unit. During charging, the current can flow from the positive terminal of the charging input to the positive terminal of the battery. During discharging, the current can only flow from the positive terminal of the battery to the positive terminal of the power supply, and the same applies to the negative terminal. The charge and discharge management unit has a local unidirectional current limiting capability to ensure that there is no leakage current between the positive and negative terminals of the charging input when the distress call bracelet is used underwater, thus ensuring electrical safety.

[0019] The signal generation and processing circuit is also equipped with LED indicator lights and a magnetic induction switch. The front end of the magnetic induction switch is a button with a strong magnet installed inside. When the button is close to the magnetic induction switch, the magnetic induction switch is turned on and turned off when it is moved away.

[0020] When the distress call bracelet is worn on the water, it is charged through the charging contacts on the transparent end cap of the bracelet, and GPS second pulse synchronization and working mode configuration are achieved through infrared photocells.

[0021] When the distress call bracelet is worn underwater, the signal processing unit collects the signal input from the vital signs monitoring module, the transceiver, the depth sensor, and the magnetic induction switch in real time.

[0022] The vital signs monitoring module can monitor a person's heart rate, blood pressure, and blood oxygen in real time. By identifying any abnormal changes in heart rate, blood pressure, and blood oxygen, it can determine whether an accident has occurred to the underwater person. If a change occurs, it will automatically send a distress signal periodically, and the LED indicator will start flashing. If it is a false trigger, the underwater person can cancel the distress call by pressing a button.

[0023] Magnetic induction switches can have multiple trigger modes, such as single click, double click, triple click, and long press, to represent different setting modes.

[0024] Depth sensors can measure the depth of underwater personnel, informing rescuers or monitoring personnel of their current water depth.

[0025] Most transceiver transducers operate in receiving mode. After passing through the transceiver converter, the transceiver transmits the signal to the amplification filter for signal amplification and filtering. The A / D converter acquires the input signal in real time, and the signal processing unit identifies and decodes the input signal to determine whether it is a valid signal. The command decoding result is displayed on the LED display screen and an automatic response is given. Underwater personnel can also manually confirm and respond after receiving the command sent by the underwater position measurement equipment.

[0026] When the distress bracelet is worn to send or respond to signals, the collected depth, heart rate, blood pressure, and blood oxygen information are encoded to form an underwater acoustic modulation signal. The analog modulation signal is then converted into a PWM digital modulation signal, which is amplified by a digital power amplifier. The transceiver operates in transmit mode and finally transmits the data to the underwater position measurement equipment, which then transmits the information to the surface monitoring center for processing.

[0027] The wearable emergency call bracelet has an active location display mode and an emergency call mode.

[0028] The active position indication mode periodically sends acoustic pulse signals, which include information on the user's depth, heart rate, blood pressure, and blood oxygen levels. The emergency distress call mode is triggered when the user encounters drowning or other accidents by actively pressing a button, or automatically when abnormal vital signs are detected. Once triggered, it periodically sends acoustic pulse signals; otherwise, it sends no signals.

[0029] The emergency call bracelet synchronization base includes several parts: the emergency call bracelet synchronization base housing, the synchronization output and charging circuit, the charging output negative terminal, the charging output positive terminal, the infrared pair, and the synchronization cable.

[0030] The synchronization cable on the emergency call wristband's synchronous base is connected to the synchronous output and charging circuit, and then connected to the synchronous cable connector to realize charging, communication, and synchronous signal transmission.

[0031] The synchronous output and charging circuit is equipped with a charging output negative terminal, a charging output positive terminal, and an infrared pair. The limiting groove on the synchronous base of the emergency call bracelet and the limiting boss on the emergency call bracelet are used for limiting and error prevention.

[0032] The negative terminal of the charging output is connected to the negative terminal of the charging input, and the positive terminal of the charging output is connected to the positive terminal of the charging input. The infrared pairs are spaced apart and their centers are opposite each other behind the transparent end cap of the distress call wristband.

[0033] The infrared pairs are paired for receiving and transmitting, enabling full-duplex communication. They utilize non-contact information transmission to achieve data communication and the transmission of GPS second pulse synchronization signals.

[0034] The multi-channel synchronization device includes several parts: a synchronization cable connector, a synchronization control box, a multi-channel synchronization control circuit, a GPS, and a comprehensive configuration cable.

[0035] The GPS and integrated configuration cable connects to the GPS equipment and the surface monitoring center; the synchronization cable connector can connect to the synchronization cable of multiple distress bracelet synchronization bases, and the multi-channel synchronization control circuit can simultaneously perform GPS second pulse synchronization of multiple distress bracelets and transmit the configuration information issued by the surface monitoring center.

[0036] The working principle of this invention is as follows: The underwater emergency rescue support system of this invention achieves safety monitoring of underwater personnel and rapid response in emergencies by integrating multiple technical components. The core of the system lies in the wireless underwater acoustic communication between the distress call wristband and the underwater positioning device. The distress call wristband is equipped with vital sign monitoring and depth measurement functions, capable of detecting the wearer's status and automatically or manually sending a distress signal upon detecting anomalies or emergencies. These signals are received by the underwater positioning device via underwater acoustic communication, which uses ultra-short baseline positioning technology and other sensor data (such as attitude, geomagnetism, and GPS) to calculate the exact location of the distress call wristband. The underwater positioning device forwards this information, along with vital sign data from the distress call wristband, to the surface monitoring center. Multi-channel synchronization devices ensure time synchronization of all distress call wristbands, making the positioning of the entire system more accurate and reliable. Furthermore, the system supports periodic location reports (active tracking mode) and emergency calls in distress (emergency receiving mode), ensuring rapid initiation of rescue operations even without regular communication. The entire process highly relies on seamless collaboration between components, precise time synchronization, and efficient data processing capabilities.

[0037] The advantages of this invention compared to the prior art are:

[0038] (1) Compared with the commonly used methods of video surveillance equipment detection, surrounding people detection, and drowning people shouting for help, the distress call bracelet of the present invention can quickly transmit distress information to the monitoring center, and rescue work can be carried out at the first moment of an accident.

[0039] (2) Compared with existing underwater rescue and search technologies, the distress call bracelet and underwater position measurement device of the present invention can monitor the location information and vital signs of the distress caller in real time, guide rescuers to quickly find the rescue target, minimize search and rescue time, and improve the success rate of rescue.

[0040] (3) Compared with existing wearable inflatable airbags, the emergency call bracelet of the present invention has the ability to monitor vital signs and will automatically call for help when it detects abnormal vital signs, thus making up for the shortcomings caused by the inability of underwater workers to actively call for help and escape when an underwater accident occurs.

[0041] (4) Compared with the existing “a kind of lifesaving water acoustic position beacon” technology, the emergency call bracelet of the present invention is smaller in size, can be carried and worn, and has a two-way information transmission function. It can be recalled in case of emergency, and its application range is wider.

[0042] (5) The underwater position measurement device of the present invention can monitor multiple underwater personnel in real time, which can provide better protection for underwater workers and trainees, and can also supervise the work area of ​​underwater personnel.

[0043] (6) The emergency call bracelet of the present invention adopts a non-contact magnetic induction design and an infrared tube information transmission design, which reduces unnecessary sealing structure design and makes it more reliable.

[0044] (7) The multi-channel synchronization device of the present invention can simultaneously synchronize and set the working mode of multiple emergency call bracelets, which is convenient for use in amusement parks with a large number of users.

[0045] (8) The emergency rescue support system of the present invention is simple in composition and small in size, and can meet the needs of use in fixed and mobile locations. It can be used even in any area at sea or on a lake. Attached Figure Description

[0046] Figure 1 This is a system composition diagram of the present invention.

[0047] Figure 2 This is a system block diagram of the present invention.

[0048] Figure 3 This is a schematic diagram of the underwater position measuring device of the present invention.

[0049] Figure 4 This is a block diagram illustrating the working principle of the underwater position measuring device of the present invention.

[0050] Figure 5 This is a schematic diagram of the emergency call bracelet structure of the present invention.

[0051] Figure 6 This is a side view of the emergency call wristband of the present invention.

[0052] Figure 7 This is a diagram showing the internal connection relationships of the emergency call bracelet of the present invention.

[0053] Figure 8 This is a diagram showing the positional relationship between the button and the magnetic induction switch of the present invention.

[0054] Figure 9 This is a block diagram illustrating the working principle of the emergency call bracelet of the present invention.

[0055] Figure 10 This is a schematic diagram of the synchronization base structure of the emergency call wristband of the present invention.

[0056] Figure 11 This is a diagram showing the internal connection relationship between the emergency call wristband and the synchronization base of the present invention.

[0057] Figure 12 This is a schematic diagram of the multi-channel synchronization device structure of the present invention.

[0058] 1—Underwater position measurement equipment; 2—Survival call bracelet; 3—Survival call bracelet synchronization base; 4—Multi-channel synchronization device; 1-1—Ultra-short baseline array; 1-2—Left end cap of watertight cylinder; 1-3—Signal acquisition, output, and processing circuit; 1-4—Watertight cylinder; 1-5—Battery; 1-6—Right end cap of watertight cylinder; 1-7—Transmitting transducer; 1-8—Watertight communication cable; 2-1—Survival call bracelet base; 2-2—Button; 2-3—Vitality monitoring module mounting slot; 2-4—Survival call bracelet sealing cylinder; 2-5—Transmitter / receiver transducer; 2-6—Rechargeable battery; 2-7—Signal generation and processing circuit; 2-8—Transparent end cap of rescue bracelet; 2-9—Limiting boss; 2-10—Depth sensor; 2 -11—Charging input positive terminal, 2-12—Charging input negative terminal, 2-13—Power supply positive terminal, 2-14—Power supply negative terminal, 2-15—Battery positive terminal, 2-16—Battery negative terminal, 2-17—LED display screen, 2-18—Infrared phototransistor, 2-19—LED indicator light, 2-20—Magnetic induction switch, 3-1—SOS wristband synchronization base housing, 3-2—Synchronization output and charging circuit, 3-3—Charging output negative terminal, 3-4—Charging output positive terminal, 3-5—Infrared phototransistor, 3-6—Limiting groove, 3-7—Synchronization cable, 4-1—Synchronization cable connector, 4-2—Synchronization control box, 4-3—Multi-channel synchronization control circuit, 4-4—GPS and integrated configuration cable. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0060] like Figures 1-2 As shown, an underwater emergency rescue support system includes an underwater position measurement device 1, a distress call wristband 2, a distress call wristband synchronization base 3, a multi-channel synchronization device 4, and a surface monitoring center. The multi-channel synchronization device 4 and the underwater position measurement device 1 are both connected to the surface monitoring center. The multi-channel synchronization device 4 can connect to multiple distress call wristband synchronization bases 3 and perform GPS second-pulse synchronization on multiple distress call wristbands 2. The underwater position measurement device 1 can receive underwater acoustic communication status information sent by the distress call wristbands 2 and simultaneously measure the location information of the distress call wristbands 2. When the distress call wristband 2 transmits a distress signal, the underwater position measurement device 1 can send the received warning information and calculated location information to the surface monitoring center, which then issues an alarm through an early warning device to quickly alert rescue personnel.

[0061] like Figures 3-4As shown, the underwater position measurement device 1 includes an ultra-short baseline array 1-1, a left end cover 1-2 of a watertight cylinder, a signal acquisition and output processing circuit 1-3, a watertight cylinder 1-4, a battery 1-5, a right end cover 1-6 of a watertight cylinder, a transmitting transducer 1-7, and a watertight communication cable 1-8. The ultra-short baseline array 1-1 is installed on the outside of the left end cover 1-2 of the watertight cylinder, and the signal acquisition and output processing circuit 1-3 is installed on the inside of the left end cover 1-2 of the watertight cylinder; the transmitting transducer 1-7 is installed on the outside of the right end cover 1-6 of the watertight cylinder and is connected to the watertight communication cable 1-8 by a sulfurized connection; the battery 1-5 is installed on the inside of the right end cover 1-6 of the watertight cylinder; the watertight communication cable 1-8 connects the signal acquisition and output processing circuit 1-3 to the surface monitoring center; the internal electronic components are sealed by the watertight cylinder 1-4 and the left and right end covers of the watertight cylinder.

[0062] The signal acquisition and output processing circuit 1-3 has the function of receiving GPS second pulse synchronization. The signal acquisition and output processing circuit 1-3 can actively transmit underwater acoustic coded signals. Through the signal processing unit, it encodes the control commands issued by the water surface monitoring center to form underwater acoustic modulation signals, and then converts the analog modulation signals into PWM digital modulation signals. The signals are amplified by digital power amplifiers, and finally the control commands are sent to the emergency call bracelet 2 through the transmitting transducer. This can be used to urgently recall personnel wearing the emergency call bracelet 2 or to transmit work task orders.

[0063] The ultra-short baseline array 1-1 receives the status information sent by the distress call bracelet 2, filters and amplifies it, and then performs A / D conversion. The signal processing unit decodes the received signal to calculate the depth, vital signs, and distress signal sent by the distress call bracelet 2. At the same time, it performs position calculation, using the ultra-short baseline positioning principle to calculate the orientation information of the distress call bracelet 2 relative to itself, and then uses synchronous ranging technology to calculate the distance information of the distress call bracelet 2 relative to itself. Finally, it uses attitude sensor data, geomagnetic sensor data, and GPS data to perform data fusion processing to obtain the final geographic coordinates of the distress call bracelet 2.

[0064] When underwater position measurement device 1 provides safety assurance for personnel wearing distress call bracelets 2, it primarily operates in two modes: active tracking monitoring mode and emergency reception mode. In active tracking monitoring mode, distress call bracelet 2 periodically sends location signals. Underwater position measurement device 1 calculates the underwater personnel's location information in real time and transmits it to the monitoring center, where it displays the personnel's location and vital signs in real time. This mode is suitable for underwater training and operations with a small number of personnel, not exceeding 10. In emergency reception mode, distress call bracelet 2 only sends a location signal when a distress call is triggered. Upon receiving a distress signal, underwater position measurement device 1 triggers an alert, displaying the location and vital signs of the person in distress. This mode is suitable for amusement parks or other environments where distress call bracelets 2 are frequently used.

[0065] like Figures 5-8 As shown, the distress call bracelet 2 includes several parts: a distress call bracelet base 2-1, a button 2-2, a vital signs monitoring module mounting slot 2-3, a distress call bracelet sealing cylinder 2-4, a transceiver 2-5, a rechargeable battery 2-6, a signal generation and processing circuit 2-7, a distress call bracelet transparent end cap 2-8, a limiting boss 2-9, a depth sensor 2-10, a charging input positive terminal 2-11, a charging input negative terminal 2-12, a power supply positive terminal 2-13, a power supply negative terminal 2-14, a battery positive terminal 2-15, a battery negative terminal 2-16, an LED display screen 2-17, an infrared pair 2-18, an LED indicator light 2-19, and a magnetic induction switch 2-20.

[0066] like Figure 5 As shown, the distress call bracelet base 2-1 is used to secure the distress call bracelet 2 to the arm. A button 2-2 is installed on the side of the distress call bracelet base 2-1, and a vital signs monitoring module mounting slot 2-3 is located in the middle. The distress call bracelet sealing cylinder 2-4 is installed on the top of the distress call bracelet base 2-1. Inside the distress call bracelet sealing cylinder 2-4, a transceiver 2-5 is installed. The transceiver 2-5 is in close contact with the inner wall of the distress call bracelet sealing cylinder 2-4, and the space between it and the inner wall is filled with sound-permeable material. The distress call bracelet sealing cylinder 2-4 is made of aluminum alloy or other metal sound-permeable material to ensure good sound transmission. A rechargeable battery 2-6 and a signal generation and processing circuit 2-7 are installed inside the transceiver 2-5. An O-ring seal is used to seal the distress call bracelet sealing cylinder 2-4 and the distress call bracelet transparent end cap 2-8.

[0067] like Figure 6 As shown, the transparent end cap 2-8 of the emergency call bracelet is made of plexiglass or other transparent hard material. It has a limiting boss 2-9 on its left side and is equipped with a depth sensor 2-10, a charging input positive terminal 2-11, and a charging input negative terminal 2-12.

[0068] like Figure 7As shown, the signal generation and processing circuit 2-7 is equipped with a power supply positive terminal 2-13, a power supply negative terminal 2-14, an LED display screen 2-17, and an infrared photodiode 2-18 on its top. After installation, the charging input positive terminal 2-11, the power supply positive terminal 2-13, and the battery positive terminal 2-15 are coaxial, as are the charging input negative terminal 2-12, the power supply negative terminal 2-14, and the battery negative terminal 2-16. The signal generation and processing circuit 2-7 has a charge and discharge management unit. During charging, the current can flow from the charging input positive terminal 2-11 to the battery positive terminal 2-15. During discharging, the current can only flow from the battery positive terminal 2-15 to the power supply positive terminal 2-13, and similarly to the negative terminal. The charge and discharge management unit has a local unidirectional current limiting capability to ensure that there is no leakage current between the charging input positive terminal 2-11 and the charging input negative terminal 2-12 when the distress call bracelet 2 is used underwater, thus ensuring electrical safety.

[0069] like Figure 8 As shown, the signal generation and processing circuit 2-7 is also equipped with an LED indicator 2-19 and a magnetic induction switch 2-20. The front end of the magnetic induction switch 2-20 is a button 2-2. A strong magnet is installed inside the button 2-2. When the button 2-2 is close to the magnetic induction switch 2-20, the magnetic induction switch 2-20 is turned on and turned off when it is away. The non-contact advantage of magnetic induction is used to realize the user's operation information input, avoiding the design of dynamic sealing structure.

[0070] like Figure 9As shown, when wearing the distress call bracelet 2 on the water surface, it is charged via the charging contacts on the transparent end cap 2-8. GPS second pulse synchronization and configuration of the working mode are achieved through the infrared pair 2-18. When wearing the distress call bracelet 2 underwater, the signal processing unit collects the signal input from the vital signs monitoring module, transceiver transducer 2-5, depth sensor 2-10, and magnetic induction switch 2-20 in real time. The vital signs monitoring module can monitor the human body's heart rate, blood pressure, and blood oxygen in real time. By identifying abnormal changes in heart rate, blood pressure, and blood oxygen, it determines whether an accident has occurred underwater. If a sudden change occurs, it automatically and periodically sends a distress signal, and the LED indicator 2-19 starts flashing. If it is a false trigger, the underwater person can cancel the distress call by pressing button 2-2. The magnetic induction switch 2-20 has multiple trigger modes, such as single click, double click, triple click, and long press, to represent different setting modes. Depth sensor 2-10 measures the depth of underwater personnel, informing rescuers or monitoring personnel of their current water depth. Transceiver 2-5 primarily operates in receiving mode. After passing through a transceiver converter, the transceiver transmits the signal to an amplification filter for amplification and filtering. An A / D converter acquires the input signal in real time, and a signal processing unit identifies and decodes the signal, determining its validity. The decoded command result is displayed on LED display 2-17, and an automatic response is provided. Underwater personnel can also manually confirm and respond to commands sent by underwater position measurement device 1. When wearing the distress call bracelet 2 to send or respond, the collected depth, heart rate, blood pressure, and blood oxygen information are encoded into an underwater acoustic modulation signal. This analog modulation signal is then converted into a PWM digital modulation signal, amplified by a digital power amplifier, and the transceiver operates in transmitting mode. Finally, the transmitting transceiver sends the data to underwater position measurement device 1, which then transmits the information to the surface monitoring center for further processing.

[0071] The distress call bracelet 2 features an active position indication mode and an emergency distress call mode. In active position indication mode, it periodically sends acoustic pulse signals containing information on the user's depth, heart rate, blood pressure, and blood oxygen levels. The underwater position measurement device 1 can then monitor the user in real-time. The emergency distress call mode is triggered when the user encounters drowning or other accidents by actively pressing button 2-2, or automatically when abnormal vital signs are detected. Once triggered, it periodically sends acoustic pulse signals; otherwise, it does not send signals.

[0072] like Figure 10As shown, the emergency call bracelet synchronization base 3 includes several parts: a synchronization base housing 3-1, a synchronization output and charging circuit 3-2, a charging output negative terminal 3-3, a charging output positive terminal 3-4, an infrared pair 3-5, and a synchronization cable 3-7. The synchronization cable 3-7 on the synchronization base housing 3-1 connects to the synchronization output and charging circuit 3-2, and then to the synchronization cable connector 4-1, realizing charging, communication, and synchronization signal transmission. The synchronization output and charging circuit 3-2 is equipped with a charging output negative terminal 3-3, a charging output positive terminal 3-4, and an infrared pair 3-5. These components, through a limiting groove 3-6 on the synchronization base housing 3-1 and a limiting boss 2-9 on the emergency call bracelet 2, provide limiting and error prevention, forming... Figure 11 The assembly effect shown is that the negative terminal of the charging output 3-3 is connected to the negative terminal of the charging input 2-12, the positive terminal of the charging output 3-4 is connected to the positive terminal of the charging input 2-11, and the infrared pair 3-5 and the infrared pair 2-18 are aligned with the center of the transparent end cap 2-8 of the emergency call wristband.

[0073] Infrared pair 3-5 and infrared pair 2-18 are opposite each other in receiving and transmitting, and have full-duplex communication capability. They utilize non-contact information transmission capability to realize data communication and transmission of GPS second pulse synchronization signals, reducing the design of information transmission contacts, thereby reducing sealing design and improving reliability.

[0074] like Figure 12 As shown, the multi-channel synchronization device 4 includes several parts: a synchronization cable connector 4-1, a synchronization control box 4-2, a multi-channel synchronization control circuit 4-3, and a GPS and integrated configuration cable 4-4. The GPS and integrated configuration cable 4-4 connects to the GPS device and the surface monitoring center. The synchronization cable connector 4-1 can connect to the synchronization cables 3-7 of multiple distress call wristband synchronization bases 3. The multi-channel synchronization control circuit 4-3 can simultaneously synchronize multiple distress call wristbands 2 via GPS second pulses and transmit configuration information sent by the surface monitoring center.

[0075] During use, the number of distress call bracelets 2 actually worn can be selected, and the underwater position measuring device 1 and distress call bracelets 2 can be synchronized and their working modes set via a multi-channel synchronization device 4. Synchronization can be set to various timed synchronization modes such as 1s, 2s, and 3s. When the underwater position measuring device 1 and distress call bracelets 2 are working in active tracking monitoring mode and active position indication mode, respectively, the underwater position measuring device 1 will monitor the location, blood pressure, heart rate, and blood oxygen information sent by the distress call bracelets 2 in real time, and promptly initiate rescue operations upon receiving distress signals or detecting abnormal behavior. When the underwater position measuring device 1 and distress call bracelets 2 are working in emergency receiving mode and emergency distress call mode, respectively, if the user triggers the distress signal of the distress call bracelets 2, the underwater position measuring device 1 will trigger monitoring, start real-time monitoring of the distress call bracelets 2, obtain the location, blood pressure, heart rate, and blood oxygen information of the distress call bracelets 2, and promptly initiate rescue operations.

[0076] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An underwater emergency rescue support system, characterized in that... include: The underwater position measurement equipment can receive underwater acoustic communication status information sent by the distress call bracelet, measure the position information of the distress call bracelet, and feed it back to the surface monitoring center. The distress call bracelet, which consists of multiple bracelets, is used to collect the wearer's physiological data and location information, and to send the status and location information to the underwater location measurement equipment via underwater acoustic communication, and to maintain a continuous communication connection with the underwater location measurement equipment; Multiple emergency call bracelet synchronization bases are available for charging the emergency call bracelets and enabling GPS second-pulse synchronization. Multi-channel synchronization equipment is used to establish synchronization and communication between multiple distress call bracelets, distress call bracelet synchronization bases and the water surface monitoring center; The surface monitoring center is connected to multiple synchronization devices and underwater position measurement devices via watertight communication cables; The underwater position measurement device includes: an ultra-short baseline array installed on the outside of the left end cover of the watertight cylinder; a signal acquisition, output, and processing circuit installed on the inside of the left end cover of the watertight cylinder; a transmitting transducer installed on the outside of the right end cover of the watertight cylinder and connected to the watertight communication cable via sulfurization; and a battery installed on the inside of the right end cover of the watertight cylinder. The watertight communication cable connects the signal acquisition, output, and processing circuit to the surface monitoring center. The internal electronic components are sealed by the watertight cylinder and the left and right end covers of the watertight cylinder. The base of the emergency call bracelet is used to install the sealing cylinder of the emergency call bracelet, and has a slot for installing the vital signs monitoring module hollowed out in the middle. The transceiver, rechargeable battery, signal generation and processing circuit, and transparent end cap of the emergency call bracelet are installed in sequence inside the sealing cylinder. The rechargeable battery powers the signal generation and processing circuit and the transceiver. The vital signs monitoring module is installed in the slot facing the inside of the bracelet. The button is located on the bottom side of the emergency call bracelet and is connected to the signal generation and processing circuit. The transceiver is in close contact with the inner wall of the sealing cylinder, and the space between it and the inner wall is filled with sound-permeable material. The sealing cylinder of the emergency call bracelet is made of metal sound-permeable material. The synchronization cable on the emergency call wristband's synchronous base is connected to the synchronous output and charging circuit, and then connected to the synchronous cable connector to realize charging, communication, and synchronous signal transmission. The synchronous output and charging circuit is equipped with a charging output negative terminal, a charging output positive terminal, and an infrared pair. The limiting groove on the synchronous base of the emergency call bracelet and the limiting protrusion on the emergency call bracelet are used for limiting and error prevention. The negative terminal of the charging output is connected to the negative terminal of the charging input, and the positive terminal of the charging output is connected to the positive terminal of the charging input. The infrared pairs are spaced apart and their centers are opposite each other behind the transparent end cap of the distress call bracelet. The infrared pairs are paired for receiving and transmitting, enabling full-duplex communication. They utilize non-contact information transmission to achieve data communication and the transmission of GPS second pulse synchronization signals.

2. The underwater emergency rescue support system according to claim 1, characterized in that, The signal acquisition and output processing circuit has the function of receiving GPS second pulse synchronization and can actively transmit underwater acoustic encoded signals. Through the signal processing unit, the control commands issued by the water surface monitoring center are encoded to form underwater acoustic modulation signals. The analog modulation signals are then converted into PWM digital modulation signals, and the signals are amplified by digital power amplifiers. The control commands are sent to the distress call bracelet using a transmitting transducer, which can be used to urgently recall personnel wearing the distress call bracelet or to transmit work task orders.

3. The underwater emergency rescue support system according to claim 1, characterized in that, The ultra-short baseline array receives the status information sent by the distress call bracelet, filters and amplifies it, and then performs A / D conversion. The signal processing unit decodes the received signal to calculate the depth, vital signs, or distress signal sent by the distress call bracelet. Simultaneously, it performs position calculation, using the ultra-short baseline positioning principle to calculate the distress call bracelet's orientation relative to itself, and then uses synchronous ranging technology to calculate the distance information of the distress call bracelet relative to itself. Finally, it uses attitude sensor data, geomagnetic sensor data, and GPS data for data fusion processing to obtain the final geographic coordinates of the distress call bracelet.

4. The underwater emergency rescue support system according to claim 1, characterized in that, The underwater position measuring device includes two operating modes: In active tracking and monitoring mode, the distress bracelet will periodically send location signals, and the underwater location measurement equipment will calculate the location information of the underwater personnel in real time and transmit it to the monitoring center; In emergency reception mode, the distress call bracelet will only send a position signal if a distress call is triggered. The underwater position measurement equipment will trigger an alarm when it receives the distress call signal.

5. The underwater emergency rescue support system according to claim 1, characterized in that, The distress call bracelet includes: The signal generation and processing circuit is equipped with a positive power supply terminal, a negative power supply terminal, an LED display screen, and an infrared photodiode on its top. The signal generation and processing circuit collects the signal input from the vital signs monitoring module and the transceiver in real time. The vital signs monitoring module can monitor a person's heart rate, blood pressure, and blood oxygen in real time. By identifying abnormal changes in a person's heart rate, blood pressure, and blood oxygen, it can determine whether an accident has occurred to an underwater person. If a change occurs, it will automatically send a distress signal periodically, and the LED indicator will start flashing. If it is a false trigger, the underwater person can cancel the distress call by pressing a button. Most transceiver transducers operate in receiving mode. After passing through the transceiver converter, the transceiver transmits the signal to the amplification filter for signal amplification and filtering. The A / D converter acquires the input signal in real time, and the signal processing unit identifies and decodes the input signal to determine whether it is a valid signal. The command decoding result is displayed on the LED display screen and an automatic response is given. Underwater personnel can also manually confirm and respond after receiving the command sent by the underwater position measurement equipment.

6. The underwater emergency rescue support system according to claim 5, characterized in that, When the distress call bracelet is worn to send or respond, the collected depth, heart rate, blood pressure and blood oxygen information is encoded to form an underwater acoustic modulation signal. The analog modulation signal is then converted into a PWM digital modulation signal, which is amplified by a digital power amplifier. The transceiver works in transmit mode and finally uses the transmitting transceiver to send the data to the underwater position measurement equipment. The underwater position measurement equipment then transmits the information to the surface monitoring center for processing. The wearable distress call bracelet has an active location display mode and an emergency distress call mode; The active position display mode sends acoustic pulse signals at regular intervals, which include the user's depth, heart rate, blood pressure and blood oxygen information; The emergency distress call mode is triggered when a user encounters drowning or other accidents by actively pressing a button, or automatically when the user detects abnormal vital signs. After triggering the distress call, an audible pulse signal is sent periodically, but no signal is sent under normal circumstances.

7. The underwater emergency rescue support system according to claim 5, characterized in that, The emergency call bracelet synchronization base includes: The multi-channel synchronization device includes a synchronization cable connector, a synchronization control box, a multi-channel synchronization control circuit, a GPS, and a comprehensive configuration cable; The GPS and integrated configuration cable connects to the GPS equipment and the surface monitoring center; the synchronization cable connector can connect to the synchronization cable of multiple distress bracelet synchronization bases, and the multi-channel synchronization control circuit can simultaneously synchronize multiple distress bracelets with GPS second pulses and transmit configuration information issued by the surface monitoring center.

8. The underwater emergency rescue support system according to claim 5, characterized in that, The signal generation and processing circuit is also equipped with a magnetic induction switch. The front end of the magnetic induction switch is a button, and a strong magnet is installed inside the button. When the button is brought close to the magnetic induction switch, the magnetic induction switch is activated. Magnetic induction switches can have multiple trigger modes, such as single click, double click, triple click, and long press, to represent different setting modes.

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