Automatic opening alarm device for falling into water and method thereof

Abstract

The application discloses a falling-in-water automatic opening alarm device and method, and belongs to the technical field of water emergency communication and rescue equipment.The device comprises the following steps: S1, setting a main body, a floating structure and a walkie-talkie main body circuit; S2, configuring a falling-in-water detection module and an alarm module on the main body and connecting them to the walkie-talkie main body circuit; S3, starting the monitoring work of the falling-in-water detection module, when the main body falls into water medium, using the buoyancy of the floating structure to make the main body float on the water surface, and keeping the bottom of the main body where the falling-in-water detection module is located towards the water medium; and S4, executing the falling-in-water alarm judgment and triggering step.The application can make the main body maintain above the water surface after falling into water, and force the falling-in-water detection module at the bottom to always face and contact the water medium, so that the triggering prerequisite of the detection function is ensured, and the problems of equipment loss and detection failure are solved.

Description

Technical Field

[0001] This invention relates to the field of maritime emergency communication and rescue equipment, specifically to an automatic alarm device and method for triggering alarms upon falling into water. Background Technology

[0002] With the rapid development of wireless communication technology, walkie-talkies, as key devices for instant communication, are a core component for ensuring personnel safety in outdoor operations, emergency rescue, and water activities. Their reliability and availability in complex environments are crucial for protecting user lives. However, walkie-talkies often face severe challenges in water-related environments during actual use, making them highly susceptible to accidental submersion. Submersion in water is one of the main causes of communication interruptions and rescue failures. Furthermore, outdoor water environments are typically accompanied by wind and waves, environmental noise, and limited visibility, posing significant challenges to the rapid location and status identification of submerged equipment. Traditional walkie-talkie designs primarily focus on land communication performance, and their housing structure and protection logic have significant shortcomings in dealing with submerged scenarios. However, these existing technologies have the following limitations:

[0003] Limitations of a single protection logic: Existing walkie-talkie equipment typically focuses on land communication, resulting in a high-density casing and a center of gravity distribution not optimized for water buoyancy. While some devices are waterproof, this is limited to preventing water molecules from entering the internal circuitry and causing short circuits, constituting passive protection. If the device accidentally falls into deep water, its overall density, exceeding that of water, will cause it to sink rapidly to the bottom, resulting in loss of the device and the inability to send distress signals. In emergencies, users will find it difficult to manually rescue themselves or call for help.

[0004] Limitations of Environmental Sensing and Interference Resistance: In complex and variable aquatic environments, relying solely on simple water contact detection is highly susceptible to environmental interference. For example, rainwater erosion, wave impact, or sweaty hands can create momentary conductivity on the sensor surface, leading to false alarms and severely interfering with normal user operation. Furthermore, aquatic environments, especially seawater, are rich in electrolytes, and long-term exposure can easily cause electrochemical corrosion at metal contact points, resulting in decreased detection sensitivity or even failure. In addition, at night or during foggy weather, ordinary signal indicators struggle to penetrate water mist, and audible and visual signals are limited by line-of-sight and hearing distances; if the location of the fall into the water is too far away, effective rescue efforts are difficult to achieve.

[0005] Limitations of alarm mechanisms: Existing technologies lack proactive water-fall detection and attitude adjustment mechanisms. After falling into water, critical components are often obstructed due to loss of attitude control, rendering the equipment ineffective in providing warnings. Furthermore, existing alarm activation logic often lacks time-domain determination of signal persistence, making it difficult to distinguish between accidental splashes and genuine water-fall events, and thus failing to achieve reliable automatic alarms while ensuring no false alarms.

[0006] In summary, existing walkie-talkie equipment suffers from several problems when dealing with sudden water-falling situations, including high structural density leading to easy sinking, lack of active buoyancy and attitude self-correction capabilities, weak environmental interference resistance, and a single alarm mechanism. It is difficult to fully utilize the advantages of hydrostatics and electronic detection technology. There has been no research on combining low-density floating structure design, anti-interference delay logic judgment, and multi-dimensional automatic alarm mechanism for automatic protection and rescue of walkie-talkies falling into water.

[0007] The information disclosed in the background section above is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0008] The purpose of this invention is to provide an automatic alarm device and method for triggering alarms upon falling into water, in order to solve the problems mentioned in the background art. The technical solution of this invention includes:

[0009] S1. A main body, a floating structure, and a walkie-talkie main circuit are provided. The floating structure is fixed to the middle of the outside of the main body, and the walkie-talkie main circuit is integrated inside the main body. The floating structure is made of a low-density material, and the main body is designed with a sealed structure.

[0010] S2. A water-fall detection module and an alarm module are configured on the main body of the device and connected to the main circuit of the walkie-talkie. The water-fall detection module is located at the bottom of the main body of the device, and the alarm module is located in the middle of the bottom of the main body of the device. The water-fall detection module includes an exposed water detection sensor and a signal processing unit.

[0011] S3. Start the monitoring work of the water fall detection module. When the main body of the fuselage falls into the water medium, the buoyancy of the floating structure is used to make the main body of the fuselage float on the water surface, and keep the bottom of the main body of the fuselage where the water fall detection module is located facing the water medium.

[0012] S4. Execute the water splash alarm judgment and triggering steps. The water detection sensor senses the water medium signal, and the signal processing unit processes the signal to filter out false water splash trigger signals. The processed detection signal is converted into a digital signal and transmitted to the main control module to drive the alarm module to issue an audible and visual alarm signal.

[0013] Preferably, in step S1, the structural parameters of the fuselage body (100) and the floating structure (200) are pre-configured based on a buoyancy model. This model takes the floating attitude stability of the fuselage body (100) after it falls into the water and the contact probability between the water-fall detection module (300) and the water medium as optimization objectives, and determines the volume distribution parameters of the floating structure (200) and the installation position parameters of the water-fall detection module (300).

[0014] Preferably, the main circuit of the walkie-talkie includes a power management module. In step S1, the power management module configures the standby power consumption strategy of the system based on the load weight range defined by the buoyancy model, and the operating parameters of the water-fall detection module 300 include the period frequency of intermittent detection.

[0015] Preferably, step S4 includes:

[0016] The water detection sensor is activated to monitor the resistance change signal;

[0017] The signal processing unit is activated to continuously determine the resistance change signal;

[0018] If the signal duration exceeds a preset threshold, the alarm module is activated to flash at a preset frequency.

[0019] Preferably, in step S1, the main body of the fuselage meets the IP68 standard requirements, and the floating structure is made of low-density engineering plastic.

[0020] Preferably, in step S2, the surface of the water detection sensor is provided with an anti-corrosion coating, and the alarm module includes a high-penetration LED light.

[0021] Preferably, the main circuit of the walkie-talkie further includes a wireless distress transmission module, and after step S4, it further includes:

[0022] S5. Activate the wireless distress transmission module to send a wireless distress signal, and stop the alarm module from working by manually resetting it after leaving the water environment.

[0023] Preferably, in step S4, the detection signal is converted into a stable digital signal after filtering and comparison.

[0024] An automatic alarm device that activates upon falling into water includes:

[0025] Main body of the fuselage;

[0026] A floating structure is located in the middle of the outer part of the fuselage body to provide buoyancy and maintain a floating attitude;

[0027] A water splash detection module is located at the bottom of the main body of the machine and includes a water detection sensor and a signal processing unit. The water detection sensor is used to detect water contact, and the signal processing unit is used to filter splash signals.

[0028] An alarm module is located at the bottom center of the main body of the machine and is used to emit audible and visual alarm signals.

[0029] Preferably, a PCB assembly is provided inside the main body of the machine, and the water fall detection module, the alarm module, the main control module and the power management module are all electrically connected through the PCB assembly.

[0030] This invention provides an improved automatic alarm device and method for triggering alarms when the device or method is used in the event of a fall into water. Compared with the prior art, it has the following improvements and advantages:

[0031] 1. This solution optimizes the mass distribution of the main body and the volume distribution of the floating structure by constructing a buoyancy model, ensuring that the equipment can automatically right itself and maintain a stable floating attitude after falling into the water. Unlike existing technologies where the equipment is prone to sinking or tipping over, this design ensures sufficient restoring torque under the coupling effect of gravity and buoyancy. This design allows the main body to overcome gravity and remain above the water surface after falling into the water, and forces the bottom water detection module to always face and contact the water medium, thus ensuring the triggering condition of the detection function and solving the problems of equipment loss and detection failure.

[0032] 2. This solution combines a signal processing unit with a main control algorithm, effectively solving the false alarm problem caused by splashing water or waves, and introducing a continuous determination in the time dimension. The system performs time-domain integration or counting on the resistance change signal, and only determines a real water-falling event when the duration of the low resistance state exceeds a preset threshold. This mathematical integration effect transforms discrete resistance fluctuations into continuous state determinations, eliminating transient pulse interference at the algorithm level, ensuring that the alarm system only responds to continuous water-falling events, and significantly improving the equipment's anti-interference capability in harsh sea conditions.

[0033] 3. This solution achieves a balance between real-time monitoring and device battery life through a power management module. Unlike existing technologies where high-frequency detection at all times leads to rapid power consumption, this solution addresses battery capacity limitations within the load weight range defined by the buoyancy model by optimizing power management strategies. It employs an intermittent detection mode, where the water-fall detection module remains dormant most of the time, activating detection only during extremely short time windows. Once the intermittent detection detects an initial signal, it immediately wakes up the system to enter continuous monitoring mode for continuous judgment. By utilizing the continuous nature of the water-fall process, it significantly reduces average power consumption without missing any real events, ensuring that the device always has sufficient power to perform high-power audible, visual, and wireless alarm tasks during extended outdoor operations.

[0034] 4. This solution addresses the corrosion problem of underwater electronic equipment through dual optimization of materials and structure. The main body adopts an IP68 protection rating design, utilizing a double-layer silicone sealing ring and a waterproof and breathable membrane to create a physical barrier, preventing water intrusion under deep-water hydrostatic pressure. The surface of the water detection sensor is covered with a gold or carbon anti-corrosion coating, utilizing its chemical inertness to isolate electrolyte corrosion and ensure detection sensitivity after long-term use. The floating structure uses low-density engineering plastics, which not only provide buoyancy but also act as a buffer layer to protect the body from impact damage. These features together create a safe working environment for the internal circuitry, ensuring the reliability of the equipment throughout its entire life cycle.

[0035] 5. This solution constructs a three-dimensional rescue system combining sound, light, and wireless signals. Addressing the limited range of traditional sound and light alarms, this solution integrates a wireless distress transmission module capable of sending wireless signals containing identification codes, overcoming visual limitations and enabling distant command centers to be immediately aware of the emergency. Simultaneously, the alarm module utilizes high-penetration red or yellow LEDs, capable of penetrating fog or water mist at night, increasing the probability of visual detection. This comprehensive alarm mechanism transforms the process from passively waiting for discovery to actively sending distress signals, significantly improving the survival rate of those who fall into the water. Attached Figure Description

[0036] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0037] Figure 1 This is a schematic diagram of the axonometric structure of the main fuselage.

[0038] Figure 2 This is a schematic diagram of the bottom structure of the main fuselage;

[0039] Figure 3 This is a schematic diagram of the process flow of the method of the present invention.

[0040] In the diagram: 100, main body of the fuselage; 200, floating structure; 300, water-fall detection module; 400, alarm module. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0042] Example 1:

[0043] Please see Figure 1-3 This invention provides a method for automatically activating an alarm when the device falls into water, comprising:

[0044] S1. Set up the main body 100, the floating structure 200 and the walkie-talkie main circuit. The floating structure 200 is fixed to the middle of the outside of the main body 100, and the walkie-talkie main circuit is integrated inside the main body 100. The floating structure 200 is made of low-density material, and the main body 100 is sealed.

[0045] S2. A water drop detection module 300 and an alarm module 400 are configured on the main body 100 and connected to the main circuit of the walkie-talkie. The water drop detection module 300 is located at the bottom of the main body 100, and the alarm module 400 is located at the middle of the bottom of the main body 100. The water drop detection module 300 includes an exposed water detection sensor and a signal processing unit.

[0046] S3. Start the monitoring work of the water fall detection module 300. When the main body 100 falls into the water medium, the buoyancy of the floating structure 200 is used to make the main body 100 float on the water surface, and keep the bottom of the main body 100 where the water fall detection module 300 is located facing the water medium.

[0047] S4. Execute the water splash alarm judgment and triggering steps. The water detection sensor senses the water medium signal, and the signal processing unit processes the signal to filter out false water splash trigger signals. The processed detection signal is converted into a digital signal and transmitted to the main control module to drive the alarm module 400 to issue an audible and visual alarm signal.

[0048] In this embodiment, existing walkie-talkie devices typically focus on land communication, and their housings have a high density, causing them to sink rapidly after falling into water, resulting in device loss and the inability to send distress signals. Even if some devices are waterproof, this is only to prevent internal short circuits and lacks active buoyancy and alarm mechanisms.

[0049] To address the aforementioned issues, the main body 100 in this embodiment incorporates a floating structure 200, altering the overall density distribution of the device. The floating structure 200 utilizes low-density materials, such as closed-cell foam composites or hollow high-strength engineering plastics, providing buoyancy greater than the weight of the main body 100. This allows the main body 100 to overcome gravity and remain above the water surface after falling into the water. The water-fall detection module 300 is specifically positioned at the bottom of the main body 100. Combined with the layout of the floating structure 200, this ensures that the center of gravity of the main body 100 in the water is lower than its center of buoyancy, automatically adjusting its posture under hydrostatic forces to ensure the bottom remains in contact with the water surface. When the water detection sensor detects the presence of water, the signal processing unit logically filters the signal, only activating the alarm module 400 if it confirms continuous falling water rather than a brief splash. This configuration transforms the walkie-talkie from passively sinking to actively floating and alarming, ensuring that the device remains an effective distress beacon even in emergency situations where manual operation is impossible.

[0050] Step S1 is the hardware-based preset stage for the execution of the alarm method;

[0051] In step S1, the structural parameters of the fuselage body 100 and the floating structure 200 are pre-configured based on a buoyancy model. This model takes the floating attitude stability of the fuselage body 100 after it falls into the water and the contact probability between the water-fall detection module 300 and the water medium as optimization objectives, and determines the volume distribution parameters of the floating structure 200 and the installation position parameters of the water-fall detection module 300.

[0052] In this embodiment, the attitude of the main body 100 in the water directly determines whether the water fall detection module 300 can work effectively. If the volume distribution parameters of the floating structure 200 are not designed properly, the main body 100 may tip over or turn upside down, causing the water fall detection module 300 located at the bottom to detach from the water surface, resulting in detection failure.

[0053] To address this, a buoyancy model was constructed, using the mass distribution of the fuselage 100, the drainage volume of the floating structure 200, and the density of the water medium as input variables to perform torque balance calculations. This calculation logic simulated the restoring torque of the fuselage 100 at different entry angles into the water. By adjusting the volume distribution of the floating structure 200, such as increasing the drainage volume on both sides of the fuselage's midsection, the fuselage 100 achieved a stable upright buoyancy in the water. This model-based parameter optimization ensures that regardless of the angle at which the fuselage 100 enters the water, it will automatically return to its upright position under the coupling effect of gravity and buoyancy, forcing the water entry detection module 300 to remain in contact with the water medium, thus guaranteeing the triggering prerequisite for the water entry detection function.

[0054] Specifically, the calculation logic of this buoyancy model is based on the stability criterion in hydrostatics. The system uses the initial stable height... As a core indicator, its calculation logic is expressed as follows:

[0055]

[0056] in, Represents the height of the center of buoyancy. Represents the height of the center of gravity, while Represents the geocentric radius, determined by the moment of inertia of the waterline. With drainage volume The ratio is determined; during model calculation, the volume distribution parameters of the floating structure 200 are adjusted iteratively to change... and The value, until the calculated The value is greater than zero and reaches the preset stability threshold. Furthermore, in order to achieve the automatic return-to-center function, the model iterates the parameters to make the inverted state an unstable equilibrium state, that is, to ensure that when the fuselage is in an attitude where the non-water-fall detection module is facing down, its initial stability height is stable. The resulting restoring torque can drive the fuselage to flip until it reaches the only stable equilibrium point with the water-fall detection module 300 facing downwards.

[0057] This buoyancy model logically represents the mechanical coupling relationship between the fuselage mass distribution and the structure's drainage volume. The model's inputs are the mass coordinate data of each fuselage component and the geometric parameters of the floating structure 200; the output is the restoring torque value of the fuselage in water. Its core objective is to determine, through simulation iteration, the optimal volume distribution position of the floating structure 200 relative to the fuselage's center of gravity, ensuring that at any water entry angle, the hydrostatic restoring torque generated by the floating structure 200 can drive the fuselage to rotate to the unique stable equilibrium point with the water entry detection module 300 facing downwards.

[0058] This derivation process ensures that when the fuselage body 100 is tilted by an external force, it can generate a sufficiently large restoring torque and automatically return to the upright floating state with the water-fall detection module 300 facing downwards.

[0059] The main circuit of the walkie-talkie includes a power management module. In step S1, the power management module configures the standby power consumption strategy of the system based on the load weight range defined by the buoyancy model, while the operating parameters of the water-fall detection module 300 include the period frequency of intermittent detection.

[0060] In this embodiment, if the walkie-talkie's main circuit maintains the water-fall detection module 300 in a high-frequency detection state at all times, it will generate continuous current consumption, significantly shortening the device's battery life and potentially causing the power to run out when a real water-fall accident occurs.

[0061] The power management module, for example, employs a low quiescent current LDO regulator in conjunction with a microcontroller's sleep timer to incorporate standby power consumption into the buoyancy model's considerations. By setting the intermittent detection frequency, such as once per second, the water-fall detection module 300 remains in sleep mode most of the time, activating detection only during extremely short time windows. This operating mode takes advantage of the slow changes in the water environment; since falling into water is a continuous process, it significantly reduces average power consumption without missing any actual water-fall events. This design balances real-time monitoring with the device's battery life, ensuring that the device always has sufficient power to perform alarm tasks during extended outdoor operations.

[0062] The steps in S4 include:

[0063] Start the water detection sensor to monitor the resistance change signal;

[0064] The signal processing unit is activated to continuously determine the resistance change signal;

[0065] If the signal duration exceeds the preset threshold, the alarm module 400 is activated to flash at a preset frequency.

[0066] In this embodiment, the outdoor environment is complex. Rain or waves can create a momentary conductive path on the surface of the water detection sensor. If this is directly triggered, it will cause frequent false alarms and interfere with normal use by the user.

[0067] Water detection sensors, such as resistive sensors with a comb-like interdigitated electrode structure, monitor the resistance between the two electrodes in real time. The resistance is infinite when dry and drops sharply when wet. A signal processing unit, such as an RC charging / discharging circuit or a microprocessor's software counter, integrates or counts this resistance change signal in the time domain. Only when the duration of the low resistance state exceeds a preset threshold, such as more than 2 seconds, does the system determine it as a real water-fall event, rather than an accidental splash. The preset threshold T is set based on the average periodic characteristics of ocean wave fluctuations. Typically, the transient conduction time of wave impact or rainwater flowing over the sensor surface is less than 1 second, and the 2-second threshold is set as a safety judgment boundary. This boundary value serves as a logic threshold to distinguish between transient water film conduction and continuous hydrostatic pressure immersion, thereby filtering out environmental false alarms at the physical level. The alarm module 400 is driven to flash at a preset frequency, such as the SOS mode frequency. This processing logic, which filters interference signals through the time dimension, improves the anti-interference capability of the alarm system, ensuring that every alarm corresponds to a real distress situation. The derivation of this persistence determination employs time-window integration logic. The main control module discretizes the resistance signal at a fixed sampling frequency f. For any sampling point, if the resistance value... If the temperature is below the water medium contact threshold, the accumulator... Perform an increment operation; otherwise, reset or decrement. The boundary conditions for alarm triggering are defined as follows: ,in The preset time threshold is used. This logic uses mathematical integration to transform discrete resistance fluctuations into continuous state determinations, eliminating transient pulse interference caused by wave impact at the algorithm level and ensuring that the output only responds to continuous water-falling events.

[0068] The specific continuous determination process is as follows: Step 1: The main control module reads the analog voltage value of the water detection sensor at a fixed sampling frequency f and binarizes it into a wet 1 or dry 0 state; Step 2: The software accumulator is started. If the current sampling state is 1, the accumulator value is incremented by 1. If it is 0, the accumulator is cleared to zero; Step 3: The real-time accumulated value is compared with the preset count value (N=T×f); Step 4: Only when the accumulated value continuously reaches or exceeds N will the main control module output a valid water-fall trigger signal to the alarm module 400;

[0069] In step S1, the main body 100 meets the IP68 standard requirements, and the floating structure 200 is made of low-density engineering plastic.

[0070] In this embodiment, the underwater environment has enormous hydrostatic pressure, and ordinary sealing structures are unable to prevent water molecules from entering. Once the internal circuit is short-circuited, all alarm functions will be instantly paralyzed.

[0071] It should be noted that the waterproof rating is not limited to IP68, and the material of the floating structure 200 is not limited to engineering plastics. Any material that can achieve the above-mentioned sealing and buoyancy effects, such as closed-cell foam and cork composites, is within the scope of protection of this invention.

[0072] The main body 100 is designed to meet IP68 protection standards, creating a robust physical barrier through double-layer silicone sealing rings at the shell seams and waterproof and breathable membranes at the acoustic components. The floating structure 200 uses low-density engineering plastics, such as modified polypropylene or polyethylene foam, which have extremely low water absorption and a density less than water. This low-density engineering plastic not only provides durable buoyancy support for the main body 100 but also acts as an external buffer layer, protecting it from damage upon impact with water. This high level of protection and material selection creates a dry and safe working chamber for the internal electronic components, forming the physical basis for the long-term reliable operation of the entire automatic alarm system in harsh aquatic environments.

[0073] In step S2, the surface of the water detection sensor is provided with an anti-corrosion coating, and the alarm module 400 includes a high-penetration LED light.

[0074] In this embodiment, the aquatic environment, especially the seawater environment, is rich in electrolytes. Long-term exposure can cause electrochemical corrosion of the metal electrodes, resulting in a decrease in detection sensitivity or even failure. At the same time, on the water surface at night or in foggy weather, the light from ordinary light sources is easily scattered and absorbed, making it difficult for search and rescue personnel at a distance to detect them.

[0075] The water detection sensor surface is covered with an anti-corrosion coating, such as a gold plating layer or a conductive carbon coating. Utilizing the chemical inertness of gold or carbon, direct contact between the electrode substrate and corrosive liquids is prevented, ensuring the sensor maintains its sensitivity to resistance changes even after long-term use. The alarm module 400 uses high-penetration LEDs, such as high-lumen power LEDs, with emission wavelengths selected for strong penetration in the red or yellow light band, enabling them to penetrate water mist in low-visibility environments. This targeted design, focusing on material durability and optical properties, extends the device's lifespan and significantly increases the probability of visually locating a person who has fallen into the water.

[0076] The main circuit of the walkie-talkie also includes a wireless distress transmitter module, and after step S4, it also includes:

[0077] S5. Activate the wireless distress transmission module to send a wireless distress signal, and stop the alarm module 400 from working by manually resetting the module after leaving the water environment.

[0078] In this embodiment, the simple sound and light alarm is limited by the distance of sight and hearing. If the person who has fallen into the water is far away from the search and rescue team, it is difficult to achieve the rescue purpose by sound and light alone.

[0079] Once activated, the wireless distress signal transmitter module, such as a specific frequency transmitter integrated into the radio frequency circuit of a walkie-talkie, sends a wireless distress signal with an identification code to nearby receiving devices via a specific communication protocol, such as the emergency call function in the Digital Mobile Radio (DMR) protocol. This signal overcomes the visual limitations of physical distance, allowing a distant command center or teammates to be immediately aware of the drowning situation. After the person in the water is rescued and removed from the water, the power supply to the alarm module 400 and the wireless distress signal transmitter module is cut off by operating the manual reset module, such as a physical button or magnetic switch. This reset mechanism prevents the device from continuously emitting interference signals in non-emergency situations and also stops unnecessary power consumption, restoring the device to its normal standby state.

[0080] In step S4, the detected signal is filtered, compared, and then converted into a stable digital signal.

[0081] In this embodiment, the original analog signal output by the water detection sensor is often mixed with noise caused by water flow fluctuations or electromagnetic interference. If it is used directly for logical judgment, it may cause the control system to malfunction.

[0082] The detection signal passes through a hardware filtering circuit, such as a low-pass filter, to remove high-frequency noise interference and retain the low-frequency components reflecting water level changes. The signal processing unit includes a filtering circuit and a comparator circuit. After passing through the hardware filtering circuit, the detection signal enters a voltage comparator and is compared with a preset reference voltage. Only when the signal amplitude exceeds the reference voltage does the comparator flip its output level, shaping the analog resistance change into a stable digital signal with steep edges, 0 or 1; that is, a high level represents water contact, a low level represents no contact, or vice versa. This digital signal directly serves as the input source for MCU interrupt triggering or polling. This signal processing process transforms ambiguous physical quantities into precise logic levels, providing the main control module with a clear and unambiguous judgment basis, ensuring the accuracy of subsequent alarm commands.

[0083] Example 2:

[0084] Please see Figure 1-2 A water-activated alarm device, comprising:

[0085] The main body of the fuselage is 100;

[0086] The floating structure 200 is located on the outside of the main body 100 at the middle, and is used to provide buoyancy and maintain the floating attitude;

[0087] The water splash detection module 300 is located at the bottom of the main body 100 and includes a water detection sensor and a signal processing unit. The water detection sensor is used to detect water contact, and the signal processing unit is used to filter splash signals.

[0088] The alarm module 400 is located at the bottom center of the main body 100 and is used to emit audible and visual alarm signals.

[0089] In this embodiment, the floating automatic alarm intercom that falls into water serves as the physical carrier of the aforementioned method, solidifying the functional logic into a specific hardware form.

[0090] The main body 100 serves as the mounting base for all functional modules, supporting all electronic and mechanical components. The floating structure 200 is integrated into the center of the main body 100 in a surrounding or embedded manner. This physical layout utilizes the lever principle to create a stable restoring torque in the water, ensuring that the main body 100 maintains a head-up floating posture based on its own structural characteristics rather than electronic control. The water-fall detection module 300 is located at the bottom of the main body 100, utilizing its lowest physical point to ensure it is the first to contact the water surface and remains submerged, providing an optimal working environment for the water detection sensor. The alarm module 400 is located in the center of the bottom, using the reflection of the water surface to enhance the diffusion range of the light signal. The physical layout of each component and its functional implementation are closely coordinated to form a rescue terminal capable of automatically sensing the environment and responding autonomously.

[0091] The main body 100 contains a PCB assembly, through which the water ingress detection module 300, alarm module 400, main control module and power management module are electrically connected.

[0092] In this embodiment, if the dispersed electronic components are connected by wires, they are prone to open circuits or poor contact during drops or severe vibrations, which seriously reduces the reliability of the equipment.

[0093] The main body 100 houses a PCB assembly, which serves not only as the hub for electrical connections but also as the mechanical framework. The front-end signal acquisition of the water-fall detection module 300, the logic operations of the main control module (such as the MCU microcontroller), the energy distribution of the power management module, and the drive control of the alarm module 400 are all interconnected through the printed circuitry on the PCB assembly. This highly integrated structural design eliminates redundant wiring harnesses, significantly reducing internal space and allowing for a more compact main body 100. Simultaneously, the PCB assembly is rigidly fixed inside the main body 100 with screws or clips, improving the overall shock resistance and ensuring that the internal circuitry maintains complete electrical continuity and normal operation even after the walkie-talkie has been subjected to the impact of a fall into water.

[0094] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for automatically opening an alarm when falling into water, characterized by, The application relates to a walkie-talkie body structure, which comprises the following steps: S1, arranging a body main body (100), a floating structure (200) and a walkie-talkie main body circuit, wherein the floating structure (200) is fixed to the middle part of the outside of the body main body (100), the walkie-talkie main body circuit is integrated in the inside of the body main body (100), the floating structure (200) is made of low-density characteristic material, and the body main body (100) is designed in a sealed mode; S2, arranging a falling-into-water detection module (300) and an alarm module (400) on the body main body (100) and connecting the falling-into-water detection module (300) and the alarm module (400) to the walkie-talkie main body circuit, wherein the falling-into-water detection module (300) is arranged at the bottom of the body main body (100), the alarm module (400) is arranged at the middle of the bottom of the body main body (100), and the falling-into-water detection module (300) comprises exposed water detection sensors and a signal processing unit; S3, starting the monitoring work of the falling-into-water detection module (300), when the body main body (100) falls into water medium, the floating structure (200) is used to make the body main body (100) float on the water surface, and the bottom of the body main body (100) where the falling-into-water detection module (300) is arranged is kept facing the water medium; S4, executing a falling-into-water alarm judging and triggering step, the water detection sensors sense water medium signals, the signals are processed by the signal processing unit to filter splash false triggering signals, the processed detection signals are converted into digital signals and transmitted to a main control module, and the alarm module (400) is driven to send out sound and light alarm signals; In the step S1, the structural parameters of the body main body (100) and the floating structure (200) are pre-configured based on a floating force model, the model takes the floating posture stability of the body main body (100) after falling into water and the contact probability of the falling-into-water detection module (300) and water medium as optimization targets, and the volume distribution parameters of the floating structure (200) and the installation position parameters of the falling-into-water detection module (300) are determined; The calculation logic of the buoyancy model is based on the stability criterion, to determine the initial stability height As a core index, its calculation logic is expressed as Wherein represents the height of the center of buoyancy, represents the height of the center of gravity, represents the metacenter radius; through parameter iteration, the inverted state is made to be an unstable equilibrium state, that is, it is ensured that when the fuselage is in a non-detecting module downward attitude, its initial stability height to generate a restoring moment to drive the fuselage to overturn until the detecting module downward unique stable equilibrium point is reached; The walkie-talkie main body circuit comprises a power management module, and in the step S1, the power management module configures the standby power consumption strategy of the system based on the load weight range defined by the floating force model, and the working parameters of the falling-into-water detection module (300) comprise the cycle frequency of intermittent detection; The step S4 comprises the following steps: Starting the water detection sensors to monitor resistance change signals; Starting the signal processing unit to continuously judge the resistance change signals; The master module is at a fixed sampling frequency The resistance signal is discretely collected. For any sampling point, if the resistance value is lower than the water medium contact threshold, the accumulator The self-increment operation is performed, otherwise, it is reset or decremented, and the boundary condition of the alarm trigger is defined as Wherein is a preset time threshold value; If the signal duration exceeds a preset threshold, starting the alarm module (400) to flash at a preset frequency; In the step S4, the detection signals are converted into stable digital signals after being filtered and compared.

2. The method of claim 1, wherein the method further comprises: In the step S1, the body main body (100) meets the requirements of the IP68 standard, and the material of the floating structure (200) is low-density engineering plastic.

3. The method of claim 1, wherein the method further comprises: In the step S2, the surface of the water detection sensors is provided with an anti-corrosion coating, and the alarm module (400) comprises high-penetration LED lamps.

4. The method of claim 1, wherein the method further comprises: The intercom main body circuit further comprises a wireless distress transmission module, and the S4 step further comprises: S5, starting the wireless distress transmission module, sending a wireless distress signal, and stopping the operation of the alarm module (400) through the manual reset module after leaving the water medium environment.

5. A fall automatic opening alarm device applied to the fall automatic opening alarm method in any one of claims 1 to 4, characterized in that, Comprise: The fuselage main body (100); The floating structure (200) is arranged at the outer middle part of the fuselage main body (100), and is used for providing buoyancy and maintaining a floating posture; The falling into water detection module (300) is arranged at the bottom of the fuselage main body (100), and comprises a water detection sensor and a signal processing unit, wherein the water detection sensor is used for detecting water medium contact, and the signal processing unit is used for filtering water splashing signal; The alarm module (400) is arranged at the middle of the bottom of the fuselage main body (100), and is used for emitting sound and light alarm signals.

6. The automatic opening and alarming device according to claim 5, wherein The PCB assembly is arranged in the interior of the fuselage main body (100), and the falling into water detection module (300), the alarm module (400), the main control module and the power management module are electrically connected through the PCB assembly.

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