Intercom based on emergency alarm function and working method thereof

Abstract

The application relates to the technical field of wireless communication, in particular to a talkback machine based on an emergency alarm function and a working method thereof. The talkback machine comprises an environment and posture mutation sensing module, a backup radio frequency link activation and configuration module, a signal attenuation compensation module, a discharge scheduling and energy limit extraction module and an extreme search and rescue response stabilization module. In the application, the intrusion of water and the mutation of a holding posture are sensed by tracking the conductivity characteristics of the bottom of a shell and the abnormality of internal space coordinates, the problem of an alarm blind area when a behavior ability is lost is effectively solved, the risk identification accuracy in an emergency environment is enhanced, the accurate calculation of signal loss and the dynamic compensation of transmission obstacles under complex medium masking are realized, the spatial coverage radius of a gain trajectory in a poor shielding environment is improved, the discharge scheduling mechanism is executed in combination with a risk level and a residual charge quantity decay rate, the energy extraction efficiency under the concurrent state of high-gain emission and large-current charging is optimized, and communication stability is ensured.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a walkie-talkie based on an emergency alarm function and its working method. Background Technology

[0002] The field of wireless communication technology involves communication methods that utilize electromagnetic wave signals propagating in free space for information exchange. This field encompasses core aspects such as radio wave transmission, reception, and signal modulation / demodulation. Through base stations, terminal equipment, wireless links, and network protocol architecture, a systematic network supporting long-distance data transmission, voice calls, and mobile internet access is constructed. Traditional walkie-talkies are two-way mobile communication tools designed to enable real-time voice communication in environments without network coverage or under specific operational conditions. Traditional walkie-talkies employ radio frequency transceivers, antennas, speakers, and microphones. Pressing a call button switches between transmit and receive modes, converting audio signals into analog radio frequency signals or digital code streams at specific frequencies for point-to-point or point-to-multipoint transmission. At the receiving end, frequency selection and demodulation circuits restore the radio frequency signal to audio. When using the emergency alarm function, traditional walkie-talkies typically trigger a preset frequency alarm tone via a physical button or insert a specific identification code and emergency call bitstream into the control channel, allowing the transmitter to send pulse signals or continuous warning tones to other terminals within the same frequency band.

[0003] Traditional walkie-talkies transmit audio signals by switching between transmit and receive modes when there is no network coverage by pressing a call button, or by triggering a preset frequency alarm tone via a physical button when using the emergency alarm function, which then sends a pulse signal from the transmitter. However, if the user is injured, falls to the ground, or falls into water and loses the ability to actively press the button, the alarm function is lost. Furthermore, the penetration loss of radio frequency signals increases dramatically under the cover of complex media, making it impossible for search and rescue base stations to receive them. At the same time, continuously sending warning tones and pulses will rapidly consume power, causing radio frequency overheating, which may lead to a complete communication interruption or even hardware damage. Summary of the Invention

[0004] To address the technical problems existing in the prior art, embodiments of the present invention provide a walkie-talkie based on an emergency alarm function and its operating method. The technical solution is as follows: On the one hand, a walkie-talkie based on an emergency alarm function is provided, the walkie-talkie including: The environmental and attitude change perception module tracks the abnormal changes in water intrusion depth on the shell surface and the device holding posture based on the conductivity change characteristics at the bottom of the walkie-talkie shell and the spatial coordinate data calculated by the triaxial microelectromechanical accelerometer. It identifies the concurrent overlapping state of water alarm and fall alarm and generates an emergency hazard judgment matrix. Based on the emergency situation determination matrix, the backup radio frequency link activation and configuration module matches the radio frequency front-end transmit power level and antenna VSWR response limit under the corresponding emergency situation level. When the regular mobile data communication service is interrupted due to environmental shielding or base station damage, it automatically starts a backup radio frequency signal independent of the main channel and generates a backup radio frequency signal transmission configuration instruction set. The signal attenuation compensation module calculates the penetration loss and spatial coverage radius reduction of the backup radio frequency signal under the cover of water or the obstruction of a fallen human body, based on the backup radio frequency signal transmission configuration instruction set. It also calculates the electromagnetic wave transmission obstruction compensation amount in combination with the receiving sensitivity of the search and rescue base station, and obtains the search and rescue signal gain compensation trajectory. The charging and draining scheduling and energy limit extraction module calls the search and rescue signal gain compensation trajectory. When the walkie-talkie is connected to the centralized charging base or multi-source power supply interface, it assesses the current danger level and the decay rate of the remaining charge, triggers the walkie-talkie charging and draining scheduling mechanism, and outputs the walkie-talkie emergency alarm process utilization rate control index.

[0005] As a further aspect of the present invention, the emergency hazard judgment matrix includes conductivity variation, liquid intrusion depth level, and electrode contact current frequency; the backup radio frequency signal transmission configuration instruction set includes power amplifier bias current adjustment value, antenna matching network switching point, and radio frequency output gain index; the search and rescue signal gain compensation trajectory includes penetration loss compensation gradient, radiation radius expansion coefficient, and spatial beam pointing parameter; and the walkie-talkie emergency alarm process utilization control index includes multi-source power supply switching lag time, charge consumption synchronization interval, and energy dispatch recovery cycle.

[0006] As a further aspect of the present invention, the environment and attitude change perception module includes: The conductivity electrode water tracking submodule is based on the conductivity electrode distribution at the bottom of the walkie-talkie. It extracts the short-circuit current and impedance drop values ​​between the electrodes, identifies the submersion depth and intrusion rate of the liquid above the electrodes, triggers the water alarm logic, and obtains the water intrusion parameters. The disability posture analysis submodule analyzes the gravitational acceleration vector distribution of the walkie-talkie in the spatial dimension, extracts the motion trajectory of the device from a vertical fall to a long-term horizontal stillness, determines the conditions for uncontrolled throwing and falling alarm caused by heatstroke or fainting, and obtains the falling disability characterization vector. The hazard feature fusion submodule calls the water intrusion parameter and the fall and disability characterization vector to calculate the coupling density of the two on the time axis, define the critical priority of single hazards and compound hazards, and generate an emergency hazard judgment matrix.

[0007] As a further aspect of the present invention, the backup radio frequency link activation and configuration module includes: Based on the emergency situation determination matrix, the water intrusion parameter quantum module blocks the conventional communication channel according to the physical obstruction characteristics of the emergency, allocates low frequency or target search and rescue frequency bands as backup radio frequency signal carriers, and obtains a frequency band scheduling priority list. The antenna impedance dynamic matching submodule, based on the frequency band scheduling priority list, tunes the inductance-capacitance matrix of the antenna matching network to suppress abnormal rises in the standing wave ratio and obtain the RF end impedance tuning parameters in response to physical displacement caused by falling or parasitic capacitance changes caused by falling into water. The transmit configuration generation submodule sets the initial power amplification bias and pulse transmission interval of the backup RF signal according to the RF terminal impedance tuning parameters, and generates a backup RF signal transmit configuration instruction set.

[0008] As a further aspect of the present invention, the signal attenuation compensation module includes: The space penetration loss calculation submodule analyzes the power dissipation decibels of the current transmission frequency under the conditions of water surface diffuse reflection, human body torso obstruction and ground soil attenuation according to the backup radio frequency signal transmission configuration instruction set, and obtains the dielectric loss attenuation gradient. Based on the dielectric loss attenuation gradient, the radiation beam reconstruction submodule adjusts the phase feed of the transmitter to change the spatial radiation pattern of the signal and obtains the spatial beam reconstruction parameters, addressing the issue of the antenna orientation deviating from the ideal vertical polarization direction under the grounded state. The gain trajectory planning submodule combines the dielectric loss attenuation gradient and spatial beam reconstruction parameters to progressively deduce the signal's reach boundary in the search and rescue space, set the corresponding power compensation step amount for each time, and obtain the search and rescue signal gain compensation trajectory.

[0009] As a further aspect of the present invention, the discharge scheduling and energy maximization module includes: The priority charging decision submodule calls the search and rescue signal gain compensation trajectory. When the device is connected to a multi-slot charging device, it compares the alarm level of the surrounding walkie-talkies in the same group, disconnects the charging current of the regular equipment, grants the charging permission to the currently distressed walkie-talkie, and obtains the charging channel priority allocation map. The RF power consumption calculation submodule extracts the instantaneous discharge peak value of the backup RF signal when performing gain compensation exceeding the preset compensation amount according to the charging channel priority allocation map, analyzes the battery impedance anti-disturbance capability when it occurs simultaneously with current charging above the first preset threshold, and obtains the charging and discharging heat dissipation boundary. The battery life index synthesis submodule locks the voltage drop preset threshold and charging supply amount to ensure continuous transmission of search and rescue pulses based on the charging and discharging heat dissipation boundary, and outputs the controlled index of walkie-talkie emergency alarm process utilization.

[0010] As a further aspect of the present invention, the voltage drop preset threshold and charging supply for ensuring continuous transmission of search and rescue pulses refer to monitoring the pulse drop amplitude of the battery terminal voltage during the gain compensation trajectory of transmitting search and rescue signals within the boundary of charge and discharge heat dissipation, setting the working voltage that maintains the RF phase-locked loop locking operation as the voltage drop preset threshold, and calculating the required compensation charging current pulse width in reverse based on the voltage drop preset threshold to determine the charging supply that satisfies energy balance.

[0011] As a further aspect of the present invention, the walkie-talkie also includes an extreme search and rescue response and stabilization module: The extreme search and rescue response stability module identifies the hardware local overload phenomenon caused by the superposition of continuous transmission of high-gain backup radio frequency signal and priority charging above the preset current threshold based on the controlled index of the walkie-talkie emergency alarm process. It extracts the power derating trigger time and frequency switching sequence of overload suppression and generates a walkie-talkie search and rescue communication stability optimization strategy. The walkie-talkie search and rescue communication stability optimization strategy includes emergency power derating threshold, minimum frequency switching interval, and multi-source power supply diversion trigger conditions.

[0012] As a further aspect of the present invention, the extreme search and rescue response stabilization module includes: The power amplifier overload suppression submodule monitors the temperature rise slope of the backup RF transmission and charge / discharge in parallel, based on the controlled index of the walkie-talkie emergency alarm process utilization, and sets the thermal protection power reduction trigger point of the RF power amplifier module to obtain the derating transmission protection threshold. The backup frequency switching timing allocation submodule allocates the sleep and wake-up cycles of multiple backup channels for polling transmission based on the derating transmission protection threshold, in order to obtain the frequency switching duty cycle sequence for resonant cavity overheating caused by transmission at a single frequency point exceeding the time threshold. The stability maintenance strategy generation submodule analyzes the communication maintenance guidelines under preset power supply constraints and preset environmental indicators based on the frequency switching duty cycle sequence, and generates a walkie-talkie search and rescue communication stability optimization strategy.

[0013] On the other hand, the working method based on the emergency alarm function is executed based on the above-mentioned walkie-talkie based on the emergency alarm function, including the following steps: S1: Based on the changes in the conductivity of the walkie-talkie casing and the internal three-axis motion coordinates, track the overlapping time period of water intrusion and human heatstroke, fainting and falling to the ground, trigger water alarm and fall alarm, and generate an emergency situation judgment matrix. S2: Based on the emergency situation determination matrix, block regular communication and activate the backup radio frequency signal, match the antenna impedance and transmission power of the radio frequency front end, and generate a backup radio frequency signal transmission configuration instruction set; S3: Based on the backup radio frequency signal transmission configuration instruction set, calculate the attenuation of the signal radiation coverage radius by the medium of the fallen and water-fallen objects, perform spatial beam polarization reconstruction, and generate a search and rescue signal gain compensation trajectory. S4: Based on the search and rescue signal gain compensation trajectory, activate the walkie-talkie charging permission when the device is seated for charging, calculate the energy utilization extreme value under the concurrent charging and discharging state, and output the walkie-talkie emergency alarm process utilization rate control index. S5: Based on the controlled index of the walkie-talkie emergency alarm process utilization, suppress the local overheating caused by current discharge exceeding the first preset threshold and high gain transmission, allocate frequency switching sleep and power derating timing, and generate a walkie-talkie search and rescue communication stability optimization strategy.

[0014] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: By tracking the conductivity characteristics at the bottom of the casing and detecting anomalies in internal spatial coordinates to sense water intrusion and sudden changes in holding posture, the system effectively solves the problem of alarm blind spots when the user loses the ability to act, enhances the accuracy of hazard identification in emergency environments, matches radio frequency parameters under the corresponding hazard level and activates backup links, achieves accurate calculation of signal loss and dynamic compensation for transmission obstacles under complex media cover, improves the spatial coverage radius of the gain trajectory in harsh obstructed environments, and executes a discharge and charge scheduling mechanism in combination with the hazard level and the decay rate of the remaining charge to output controlled indicators, optimizes the energy extraction efficiency under the concurrent state of high-gain transmission and high-current charging, and ensures stable communication. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a walkie-talkie based on an emergency alarm function provided in an embodiment of the present invention; Figure 2 This is a diagram showing the appearance of the walkie-talkie of the present invention; Figure 3 This is a schematic diagram of the walkie-talkie frame of the present invention; Figure 4 This is a flowchart of the environment and attitude change perception module in this invention; Figure 5 This is a flowchart of the backup radio frequency link activation and configuration module in this invention; Figure 6 This is a flowchart of the signal attenuation compensation module in this invention; Figure 7This is a flowchart of the discharge and filling scheduling and energy maximization module in this invention; Figure 8 This is a flowchart of the extreme search and rescue response stabilization module in this invention; Figure 9 This is a flowchart of a working method based on an emergency alarm function provided in an embodiment of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0018] To make the technical problems, solutions, and advantages of this invention clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0019] This invention provides a walkie-talkie based on an emergency alarm function, such as... Figure 1 , 2 The walkie-talkie shown in Figure 3 is based on an emergency alarm function. The walkie-talkie includes: The environmental and attitude change perception module tracks the abnormal changes in water intrusion depth on the shell surface and the device holding posture based on the conductivity change characteristics at the bottom of the walkie-talkie shell and the spatial coordinate data calculated by the triaxial microelectromechanical accelerometer. It identifies the concurrent overlapping state of water alarm and fall alarm and generates an emergency hazard judgment matrix. The backup radio frequency link activation and configuration module is based on the emergency situation judgment matrix. It matches the radio frequency front-end transmit power level and antenna VSWR response limit under the corresponding emergency level. When the regular mobile data communication service is interrupted due to environmental shielding or base station damage, it automatically starts the backup radio frequency signal independent of the trunk channel and generates a backup radio frequency signal transmission configuration instruction set. The signal attenuation compensation module calculates the penetration loss and spatial coverage radius reduction of the backup radio frequency signal under the cover of water or the obstruction of a fallen human body, based on the backup radio frequency signal transmission configuration instruction set. It also calculates the electromagnetic wave transmission obstruction compensation amount by combining the receiving sensitivity of the search and rescue base station, and obtains the search and rescue signal gain compensation trajectory. The charging and energy extraction module calls the search and rescue signal gain compensation trajectory. When the walkie-talkie is connected to the centralized charging base or multi-source power supply interface, it assesses the current danger level and the decay rate of the remaining charge, triggers the walkie-talkie charging and energy extraction mechanism, and outputs the walkie-talkie emergency alarm process utilization rate control index. The extreme search and rescue response stability module is based on the controlled index of walkie-talkie emergency alarm process utilization. It identifies the hardware local overload phenomenon caused by the superposition of continuous transmission of high-gain backup radio frequency signal and priority charging above the preset current threshold. It extracts the power derating trigger time and frequency switching sequence of overload suppression and generates a walkie-talkie search and rescue communication stability optimization strategy.

[0020] The emergency hazard judgment matrix includes conductivity variation, liquid intrusion depth level, and electrode contact current frequency. The backup RF signal transmission configuration instruction set includes power amplifier bias current adjustment value, antenna matching network switching point, and RF output gain index. The search and rescue signal gain compensation trajectory includes penetration loss compensation gradient, radiation radius expansion coefficient, and spatial beam pointing parameters. The walkie-talkie emergency alarm process utilization control indicators include multi-source power supply switching lag time, charge consumption synchronization interval, and energy dispatch recovery cycle. The walkie-talkie search and rescue communication stability optimization strategy includes emergency power derating threshold, minimum frequency switching interval, and multi-source power supply diversion trigger conditions.

[0021] Specifically, such as Figure 3 , 4 As shown, the environment and attitude change perception module includes: The conductivity electrode water tracking submodule is based on the conductivity electrode distribution at the bottom of the walkie-talkie. It extracts the short-circuit current and impedance drop values ​​between the electrodes, identifies the submersion depth and intrusion rate of the liquid above the electrodes, triggers the water alarm logic, and obtains the water intrusion parameters. The system acquires real-time short-circuit current and impedance values ​​between adjacent conductive electrodes at the bottom of the walkie-talkie. In a wet environment, the conductive medium triggers a current loop between the electrodes. The analog-to-digital converter (ADC) acquires analog level signals at a fixed sampling rate and converts them into digital impedance data. The system averages the real-time impedance values ​​over several consecutive sampling periods to obtain a smoothed impedance value. A baseline insulation impedance value for a dry environment is extracted, and the ratio of the smoothed impedance value to the baseline insulation impedance value is calculated to obtain the impedance attenuation ratio. An impedance mutation threshold calibrated by a flood test is obtained. Flooding is triggered when the impedance attenuation ratio is less than this threshold. The vertical electrode spacing is acquired, and the number of electrodes conducting when the real-time short-circuit current reaches a steady state is extracted. The number of conducting electrodes is multiplied by the spacing to obtain the liquid immersion depth. The conduction time difference between adjacent electrodes is recorded, and the ratio of the electrode spacing to the time difference is calculated to obtain the liquid intrusion rate. For example, with a baseline insulation impedance of 1,000,000 ohms and a smoothed impedance of 30,000 ohms, the impedance attenuation ratio is calculated to be 0.03. If this ratio is less than a set threshold of 0.05, flooding is determined. Multiplying the electrode spacing of 5 mm by the number of conductions of 4 yields a flooding depth of 20 mm. Dividing the spacing by the time difference of 0.1 seconds yields an intrusion rate of 50 mm per second. The flooding depth and intrusion rate are encapsulated as water intrusion parameters and output.

[0022] The disability posture analysis submodule analyzes the gravitational acceleration vector distribution of the walkie-talkie in the spatial dimension, extracts the motion trajectory of the device from a vertical fall to a long-term horizontal stillness, determines the conditions for uncontrolled throwing and falling alarm caused by heatstroke or fainting, and obtains the falling disability characterization vector. A three-axis MEMS accelerometer is used to collect spatial gravity acceleration vector distribution data at a fixed sampling frequency. Acceleration components for each axis in the three-dimensional coordinate system are extracted, and the sum of squares and square roots of the three-dimensional acceleration components are performed to obtain the composite acceleration value. A drop-calibrated free-fall threshold is obtained; when the composite acceleration value continuously falls below the free-fall threshold, it is recorded as the vertical fall initiation point. The composite acceleration value is monitored within a preset time window after the vertical fall initiation point. If a sudden peak exceeding the impact benchmark value occurs, a ground impact is determined. After the impact, the variance of each axis acceleration component is continuously calculated over a fixed period. If the variance values ​​of all three axes are less than the set static variance value, the device is determined to be in a lateral long-term static state. Combining the vertical fall, impact time point, and static duration parameters, the conditions for uncontrolled throwing and falling alarms due to abnormal conditions are determined. For example, if the three-axis acceleration components are collected and the composite acceleration value is calculated to be 0.12 times the standard gravitational acceleration, which is lower than the threshold of 0.15, a fall initiation judgment is triggered. After the impact, the variance of all three axes was less than the set value of 0.01, confirming that the object was stationary for a long time in the lateral direction. The fall height, peak impact and stationary time were extracted to generate a collapse disability characterization vector.

[0023] The hazard feature fusion submodule calls the water intrusion parameter and the fall and disability representation vector, calculates the coupling density of the two on the time axis, defines the critical priority of single hazards and compound hazards, and generates an emergency hazard judgment matrix. The system receives water intrusion parameters and fall-incapacity representation vectors, and reads a preset time sliding window. It extracts the timestamps of the water intrusion parameter generation and the fall-incapacity representation vector generation, calculates the absolute value of the difference between them to obtain the hazard time interval, and obtains the hazard coupling density judgment benchmark. When the hazard time interval is less than this benchmark, the coupling density on the current time axis is considered compact, the current hazard is defined as a composite hazard, and the emergency priority is set to the highest level. If the hazard time interval is greater than or equal to the benchmark or there is only a single sensor vector input, it is defined as a single hazard, and the emergency priority is downgraded. The extracted hazard type, emergency priority, and corresponding parameter values ​​are combined and filled into a preset two-dimensional data structure. For example, if the water intrusion parameter timestamp is 150 seconds and the fall-incapacity representation vector timestamp is 180 seconds, the absolute value of the difference yields a hazard time interval of 30 seconds. Since 30 seconds is less than the coupling density judgment benchmark of 60 seconds, it is defined as a composite hazard and assigned a level 1 emergency priority. By integrating the aforementioned parameter values ​​and type levels, an emergency hazard judgment matrix is ​​generated and output, thus completing the hazard level definition operation.

[0024] Specifically, such as Figure 3 , 5 As shown, the backup RF link activation and configuration module includes: The water intrusion parameter quantum module is based on the emergency hazard judgment matrix. According to the physical obstruction characteristics of the hazard, it blocks the conventional communication channel and allocates low frequency or target search and rescue frequency band as backup radio frequency signal carrier to obtain a frequency band scheduling priority list. Based on the emergency situation assessment matrix, the parameters of water intrusion and the priority of the emergency are read. A dictionary of the operating frequency of the conventional communication channel and the physical obstruction attenuation coefficient is obtained. The physical obstruction attenuation coefficient dictionary is looked up based on the inundation depth in the water intrusion parameters to obtain the estimated attenuation value of the current frequency band. When the estimated attenuation value of the current frequency band is greater than the blocking benchmark value, a conventional communication channel blocking command is issued. A list of backup low-frequency channels and a list of target search and rescue frequency bands are obtained, and the priority of the emergency situation assessment matrix is ​​read. When the priority of the emergency is the highest level, the conventional communication channel is blocked, and a low-frequency or target search and rescue frequency band is allocated as a backup radio frequency signal carrier. The target search and rescue frequency band is designated as the first allocation target, and the low-frequency channel as the second allocation target. A scheduling sequence is obtained by combining and sorting these components. For example, if the inundation depth is 20 mm, the estimated attenuation value of the current frequency band is 45 dB, which is greater than the blocking benchmark value of 30 dB, triggering channel blocking. Based on the level 1 emergency priority, the 406 MHz target search and rescue frequency band is directly allocated as the highest priority carrier and arranged in a preferred order along with other backup channel codes. Integrate frequency band codes and priority numbers to generate a frequency band scheduling priority list and issue it for execution.

[0025] The antenna impedance dynamic matching submodule is based on the frequency band scheduling priority list. It tunes the inductance-capacitance matrix of the antenna matching network to suppress the abnormal rise of the VSWR and obtain the RF end impedance tuning parameters in response to the physical displacement caused by the drop or the parasitic capacitance change caused by falling into water. The frequency band scheduling priority list is read to determine the currently active backup search and rescue frequency band. Forward and reverse power at the antenna end are collected via a directional coupler. The ratio of reverse power to forward power is calculated and the square root is taken to obtain the reflection coefficient. The constant and the reflection coefficient are summed and subtracted respectively to obtain the numerator and denominator, and the ratio of these two is taken to obtain the real-time voltage standing wave ratio (VSWR). A VSWR safety threshold is obtained; when the real-time VSWR exceeds this threshold, an abnormal surge is considered to have occurred. The reference matching impedance is obtained, and the impedance deviation is calculated by performing a complex conjugate deviation operation between the real-time VSWR and the reference matching impedance. Based on the impedance deviation, the compensation capacitor and compensation inductor values ​​are obtained. For example, if forward power is 100 milliwatts and reverse power is 25 milliwatts, the square root of the ratio yields a reflection coefficient of 0.5. The ratio of the summation term 1.5 to the difference term 0.5 yields a real-time voltage standing wave ratio (VSWR) of 3.0. A VSWR greater than the safety threshold of 2.0 is considered abnormal. Substituting this into a reference impedance of 50 ohms, a complex conjugate deviation calculation is performed to determine the required parallel 2 picofarad compensation capacitor value. The package impedance tuning command parameters generate the RF terminal impedance tuning parameters, driving the microelectromechanical switch to tune the inductor-capacitor matrix.

[0026] The transmit configuration generation submodule sets the initial power amplification bias and pulse transmission interval of the backup RF signal based on the RF impedance tuning parameters, and generates the backup RF signal transmit configuration instruction set. Based on the RF impedance tuning parameters, confirm that the antenna matching network has reached impedance steady state, and read the current remaining battery power data and the required communication distance for the backup RF signal. Multiply the remaining battery power by a preset power conversion coefficient to obtain the available energy base, and multiply the required communication distance by a path loss compensation coefficient to obtain the target transmit power. Perform a matching comparison between the target transmit power and the available energy base to set the initial power amplification bias voltage value for the backup RF signal. Obtain the pulse duty cycle of the emergency alarm specification, and perform a ratio calculation between the pulse high-level time and the pulse duty cycle to determine the total cycle time and pulse transmission interval of the backup RF signal. For example, if the remaining battery power is 40%, after multiplication and matching comparison, set the initial power amplification bias voltage value to 3.3 volts. If the required pulse high-level time is 100 milliseconds and the pulse duty cycle is set to 10%, perform a ratio calculation between 100 milliseconds and 0.1 to obtain a total cycle time of 1000 milliseconds, and derive a pulse transmission interval of 900 milliseconds. The calculated initial power amplification bias voltage value is packaged with the pulse transmission interval to generate a spare RF signal transmission configuration instruction set, which is then written into the RF baseband chip.

[0027] Specifically, such as Figure 3 , 6 As shown, the signal attenuation compensation module includes: The space penetration loss calculation submodule analyzes the power dissipation decibels of the current transmission frequency under the conditions of water surface diffuse reflection, human body torso obstruction and ground soil attenuation based on the backup radio frequency signal transmission configuration instruction set, and obtains the dielectric loss attenuation gradient. The system reads the current transmission frequency based on the backup RF signal transmission configuration instruction set, calls the ambient light and ultrasonic sensors to obtain the medium type, and acquires the corresponding attenuation constant and estimated penetration thickness measured by the sensors for each medium. The attenuation constant and estimated penetration thickness are multiplied to obtain the first power dissipation decibels under water surface diffuse reflection conditions, the second power dissipation decibels under human torso obstruction conditions, and the third power dissipation decibels under ground soil attenuation conditions. These three values ​​are summed to obtain the total power dissipation decibels. The ratio of the total power dissipation decibels to a preset distance step value is then calculated to analyze and obtain the medium loss attenuation gradient. For example, extracting the transmission frequency of 406 MHz, multiplying the water surface diffuse reflection attenuation constant of 5 dB per meter by the thickness of 0.2 meters, yields the first power dissipation of 1 dB. Multiplying the human torso obstruction attenuation constant of 20 dB per meter by the thickness of 0.3 meters, yields the second power dissipation of 6 dB. Multiplying the ground soil attenuation constant of 15 dB per meter by the thickness of 0.1 meters, yields the third power dissipation of 1.5 dB. Summing these values, the total power dissipation is 8.5 dB. Ratioing 8.5 dB to the distance step value of 10 meters yields the dielectric loss attenuation gradient.

[0028] The radiation beam reconstruction submodule is based on the dielectric loss attenuation gradient. To address the issue of the antenna orientation deviating from the ideal vertical polarization direction under the grounding state, it adjusts the phase feed at the transmitting end, changes the spatial radiation pattern of the signal, and obtains the spatial beam reconstruction parameters. The dielectric loss attenuation gradient is read and the ground-falling disability characterization vector is invoked, while simultaneously acquiring the current tilt angle data of the device calculated in real time by the inertial sensor. The angle difference is calculated by subtracting the ideal vertical polarization direction from the current tilt angle data, and the phase compensation conversion coefficient is read. Based on the angle difference, the basic phase offset is obtained. The dielectric loss attenuation gradient is multiplied by the environmental weighting coefficient to obtain the loss correction term. The basic phase offset and the loss correction term are summed to obtain the final transmitter phase feed adjustment value. The phase feed of each vibrator in the array is deflected according to the adjustment value. For example, if the angle difference between the device tilt sensor output and the vertical polarization direction is 90 degrees, the basic phase offset is obtained as 45 degrees. The dielectric loss attenuation gradient of 0.85 dB / m is multiplied by the environmental weighting coefficient of 10 to obtain the loss correction term of 8.5 degrees. The basic phase offset of 45 degrees and the loss correction term of 8.5 degrees are summed to obtain the final transmitter phase feed adjustment value of 53.5 degrees. The numerical values ​​containing this adjustment are packaged, and the spatial beam reconstruction parameters are output. This drives the phase-shifting network to adjust the phase feed at the transmitter, thereby changing the spatial radiation pattern of the signal.

[0029] The gain trajectory planning submodule combines the dielectric loss attenuation gradient and spatial beam reconstruction parameters to deduce the signal's reach boundary in the search and rescue space step by step, set the power compensation step amount at the corresponding time, and obtain the search and rescue signal gain compensation trajectory. By combining the dielectric loss attenuation gradient and spatial beam reconstruction parameters, coverage extrapolation is performed to obtain the initial transmit power and the receiver sensitivity limit. The difference between the two is calculated to obtain the available link budget in dB. This available link budget in dB is then substituted into a composite attenuation equation incorporating the free-space propagation loss model and the dielectric loss gradient. The logarithmic distance path loss model is used to solve this equation in reverse, estimating the signal's reach distance to the spatial boundary. Time-slice nodes and their corresponding search and rescue probability functions are read, and power compensation steps are set for different time nodes. The transmit power at the previous time node is summed with this power compensation step to generate the total transmit power at the current time. For example, the initial transmit power of 30 dB / mW and the receiver sensitivity limit of -120 dB / mW are subtracted to obtain an available link budget of 150 dB. This 150 dB is then substituted into the logarithmic loss formula with a path loss exponent of 3.5 and an added dielectric loss term for iterative solution, estimating an initial reach distance of 176 meters to be reached. The power compensation step value of 2 dB corresponding to the first time segment node is read and summed to obtain the current transmission power increased to 32 dBmW. The power parameters of each time node are accumulated sequentially. The correspondence between the power values ​​of all time nodes and the trigger time is integrated to generate the search and rescue signal gain compensation trajectory.

[0030] Specifically, such as Figure 3 , 7 As shown, the energy supply and drainage scheduling and energy maximization module includes: The priority charging decision submodule calls the search and rescue signal gain compensation trajectory. When the device is connected to a multi-slot charging device, it compares the alarm level of the surrounding walkie-talkies in the same group, disconnects the charging current of the regular equipment, grants the charging permission to the currently endangered walkie-talkie, and obtains the charging channel priority allocation map. The search and rescue signal gain compensation trajectory is invoked and triggered when the device is connected to a multi-slot charging device. The current emergency priority of the distressed walkie-talkie is extracted, and the alarm levels and charging request status of surrounding walkie-talkies in the same group are read from the communication bus. The emergency priority of the current distressed walkie-talkie is compared with the alarm levels of surrounding walkie-talkies. If the distressed walkie-talkie has the highest emergency priority and its value is higher than that of surrounding devices, a signal to disconnect the charging current control of the regular equipment is issued. The total charging power pool capacity of the charging base is read, and a preset proportion of the total charging power pool capacity is allocated to the charging channel of the current distressed walkie-talkie. For example, if the total charging power pool capacity of the multi-slot charging device is 100 watts, the current distressed walkie-talkie is determined to be at emergency priority level 1, and surrounding devices are at alarm level 0. After the determination is established, the fast charging permission of surrounding devices is disconnected and downgraded to trickle charging mode. 80% of the 100 watts, i.e., 80 watts, is extracted and forcibly allocated to the slot where the current distressed walkie-talkie is located. By integrating port numbers and current allocation values, the system assigns charging and drain permissions to the currently endangered walkie-talkies and outputs a charging channel priority allocation diagram containing current ratio parameters for each slot, which is then executed by the power management chip.

[0031] The RF power consumption calculation submodule extracts the instantaneous discharge peak value of the backup RF signal when performing gain compensation exceeding the preset compensation amount according to the charging channel priority allocation map, analyzes the battery impedance anti-disturbance capability when it occurs simultaneously with current charging above the first preset threshold, and obtains the charging and discharging heat dissipation boundary. Based on the charging channel priority allocation diagram, the search and rescue signal gain compensation trajectory is read, and the maximum transmit power parameter of the backup RF signal is extracted. The maximum transmit power parameter is multiplied by the reciprocal of the RF conversion efficiency, and divided by the supply voltage to obtain the instantaneous discharge peak current. The high-current charging value is extracted from the charging channel priority allocation diagram to obtain the battery's internal resistance and internal thermal resistance parameters. The difference between the high-current charging value and the instantaneous discharge peak current is calculated to obtain the net current. The square of the net current is then multiplied by the battery's internal resistance parameter to obtain the internal heat generation power. The internal heat generation power is multiplied by the internal thermal resistance parameter to obtain the estimated temperature rise value. For example, extracting the maximum transmit power of 5 watts and the RF conversion efficiency of 50%, the instantaneous discharge peak current is calculated as 1.3 amps after multiplication and division, and the high-current charging value is extracted as 2.0 amps. The difference between the high-current charging value of 2.0 amps and the instantaneous discharge peak current of 1.3 amps is calculated to obtain a net current of 0.7 amps. The square of 0.7 is multiplied by the rated internal resistance of 0.15 ohms to obtain an internal heat generation power of approximately 0.0735 watts. Multiplying 0.0735 watts by the thermal resistance of 5 degrees Celsius per watt yields an estimated temperature rise of approximately 0.37 degrees Celsius. If the ambient temperature is added and the result is less than the set safe temperature rise limit for the casing, the package current parameter and the temperature rise value generate a charge / discharge heat dissipation boundary, which is then output.

[0032] The battery life index synthesis submodule locks the preset threshold for voltage drop and charging supply to ensure continuous transmission of search and rescue pulses based on the charging and discharging heat dissipation boundary, and outputs the controlled index of walkie-talkie emergency alarm process utilization. The voltage drop preset threshold and charging supply for ensuring continuous transmission of search and rescue pulses refer to monitoring the pulse drop amplitude of the battery terminal voltage during the gain compensation trajectory of transmitting search and rescue signals within the boundary of heat dissipation during charging and discharging. The operating voltage that maintains the RF phase-locked loop lock operation is set as the voltage drop preset threshold, and the required compensation charging current pulse width is calculated in reverse based on the voltage drop preset threshold to determine the charging supply that satisfies energy balance. Based on the voltage drop threshold and charging supply amount locked within the charge / discharge heat dissipation boundary to ensure the transmission of search and rescue pulses, the voltage drop amplitude of the battery terminals is monitored within the charge / discharge heat dissipation boundary. The minimum stable voltage parameter for maintaining the RF phase-locked loop (PLL) lock operation is read and set as the voltage drop threshold. The charge consumed per pulse transmission is extracted, and the ratio of this charge to the charging efficiency coefficient is calculated to obtain the actual theoretical charge replenishment. Based on the voltage drop threshold, the theoretical charge is inversely calculated by comparing it to the constant current charging current to determine the pulse width of the compensation charging current. For example, when monitoring the battery terminal voltage drop during pulse transmission, the minimum stable voltage parameter of the PLL (6.5 volts) is read and set as the voltage drop threshold. The charge consumed per pulse (0.5 coulombs) and the charging efficiency coefficient (0.8) are extracted, and the ratio is calculated to obtain the actual theoretical charge replenishment of 0.625 coulombs. A constant current charging current of 2.5 amps is obtained. The ratio of 0.625 coulombs to 2.5 amps is used to calculate the compensation charging current pulse width of 0.25 seconds. This 0.25 seconds is set as the charging supply amount to meet energy balance. The voltage drop preset threshold and the charging supply amount are integrated to output a controlled indicator of the walkie-talkie emergency alarm process utilization.

[0033] Specifically, such as Figure 3 , 8 As shown, the extreme search and rescue response and stability maintenance module includes: The power amplifier overload suppression submodule monitors the temperature rise slope of the backup RF transmission and charge / discharge in parallel, based on the controlled index of the walkie-talkie emergency alarm process utilization, and sets the thermal protection power reduction trigger point of the RF power amplifier module to obtain the derating transmission protection threshold. Based on the controlled indicators of walkie-talkie emergency alarm process utilization, a thermistor temperature sensor is used to monitor real-time temperature data of standby RF transmission and rapid charge / discharge in parallel. The temperature rise slope is extracted by subtracting the current sampled temperature from the previous sampled temperature. An overload temperature rise slope warning value is read; when the temperature rise slope exceeds this warning value, a trigger judgment is made. The safe operating junction temperature limit of the RF power amplifier module is extracted, and a preset safety margin coefficient is subtracted to obtain the thermal protection power reduction trigger point. The power linear attenuation coefficient is found based on the current temperature, and the original transmission power is multiplied by the power linear attenuation coefficient to obtain the derating transmission protection threshold. For example, the difference between a sampled temperature of 60 degrees Celsius and a previous temperature of 57 degrees Celsius yields a temperature rise slope of 3 degrees Celsius per second, which is greater than the set warning value of 2 degrees Celsius per second. The safe operating junction temperature limit of 85 degrees Celsius is extracted, and the safety margin coefficient of 10 degrees Celsius is subtracted to obtain the trigger point of 75 degrees Celsius. The power linear attenuation coefficient of 0.8 is read from a table based on the current temperature value. The original transmit power of 5 watts is multiplied by 0.8 to obtain a value of 4 watts. This value of 4 watts is then set as the derating transmit protection threshold and written into the register.

[0034] The backup frequency switching timing allocation submodule allocates the sleep and wake-up cycles of multiple backup channels for polling transmission based on the derating transmission protection threshold and the resonant cavity overheating caused by transmission at a single frequency point exceeding the time threshold, thereby obtaining the frequency switching duty cycle sequence. The RF front-end resonant cavity is adjusted according to the derating transmission protection threshold, and the center frequency parameters and thermal constants of multiple backup channels are read. The ratio of the derating transmission protection threshold to the channel cavity thermal constant is used to calculate the theoretical maximum continuous transmission time before each channel reaches the thermal protection power reduction trigger point. The alarm cycle time is read, and the difference between the alarm cycle time and the theoretical maximum continuous transmission time is calculated to obtain the cooling sleep time. The theoretical maximum continuous transmission time is set as the wake-up cycle, and the cooling sleep time is set as the sleep cycle. For example, reading the thermal constant of the backup channel cavity, the calculation shows that the theoretical maximum continuous transmission time under the derating transmission protection threshold of 4 watts is 10 seconds. The alarm cycle time of 30 seconds is read, and the difference between 30 seconds and 10 seconds is calculated to obtain a cooling sleep time of 20 seconds. 10 seconds is set as the channel wake-up cycle, and 20 seconds is set as the sleep cycle. Perform traversal operations on all backup channels to derive the working percentage time period, integrate the wake-up and sleep cycle data of all backup channels, perform time-series interleaving and splicing, encapsulate the duty cycle parameter data to generate a frequency point switching duty cycle sequence and output it to the baseband.

[0035] The stability maintenance strategy generation submodule analyzes the communication maintenance guidelines under preset power supply constraints and preset environmental indicators based on the frequency switching duty cycle sequence, and generates a walkie-talkie search and rescue communication stability optimization strategy. Based on the frequency switching duty cycle sequence, the entire system is configured for stability maintenance. Communication maintenance guidelines and underlying remaining power calculation data under extreme power constraints are read. The fixed energy consumption integral for each transmission cycle in the frequency switching duty cycle sequence is obtained. The remaining power calculation data is compared with the fixed energy consumption integral to calculate the estimated remaining energy alarm cycle count, and the minimum search and rescue waiting time benchmark is read. The theoretical total maintenance duration is calculated by multiplying the alarm cycle count by the single cycle time. When the theoretical total maintenance duration is less than the minimum search and rescue waiting time benchmark, a degraded communication protocol is triggered. For example, if the ratio calculation yields an estimated alarm cycle count of 500 and a single cycle time of 30 seconds, the product yields a theoretical total maintenance duration of 15,000 seconds, which is far less than the minimum search and rescue waiting time benchmark of 24 hours. Based on the communication maintenance guidelines, the degraded communication protocol is activated, the analog voice transmission process channel is closed, and only the low-rate digital beacon positioning packet transmission process is open. The forced digital beacon mode parameters and the degraded communication protocol status, along with the aforementioned frequency switching duty cycle sequence, are packaged and compiled to generate a walkie-talkie search and rescue communication stability optimization strategy, which is then sent to the main control chip to maintain the communication baseline.

[0036] Please see Figure 9The working method based on the emergency alarm function is based on the above-mentioned walkie-talkie based on the emergency alarm function, and includes the following steps: S1: Based on the changes in the conductivity of the walkie-talkie casing and the internal three-axis motion coordinates, track the overlapping time period of water intrusion and human heatstroke, fainting and falling to the ground, trigger water alarm and fall alarm, and generate an emergency situation judgment matrix. S2: Based on the emergency situation judgment matrix, block regular communication and activate the backup radio frequency signal, match the antenna impedance and transmission power of the radio frequency front end, and generate a backup radio frequency signal transmission configuration instruction set; S3: Based on the backup radio frequency signal transmission configuration instruction set, calculate the attenuation of the signal radiation coverage radius by the medium that has fallen to the ground and fallen into the water, perform spatial beam polarization reconstruction, and generate a search and rescue signal gain compensation trajectory. S4: Based on the search and rescue signal gain compensation trajectory, activate the walkie-talkie charging permission when the device is seated and charging, calculate the energy utilization extreme value under the concurrent charging and discharging state, and output the walkie-talkie emergency alarm process utilization rate control index. S5: Based on the controlled index of walkie-talkie emergency alarm process utilization, suppress the local overheating caused by current discharge exceeding the first preset threshold and high gain transmission, allocate frequency switching sleep and power derating timing, and generate walkie-talkie search and rescue communication stability optimization strategy.

[0037] The above embodiments illustrate preferred embodiments of the present invention. Any equivalent adjustments to the technical solution based on software engineering methods are within the scope of protection, including but not limited to: implementing algorithm logic using different programming languages, refactoring functional modules into services, adjusting data interaction protocols, and optimizing resource scheduling strategies. Any implementation scheme derived from reasonable modifications to the data processing flow, service call chain, or walkie-talkie architecture layer without departing from the core technology of the present invention should be considered within the protection scope defined by the technical solution of the present invention.

Claims

1. A walkie-talkie based on an emergency alarm function, characterized in that, The walkie-talkie includes: The environmental and attitude change perception module tracks the abnormal changes in water intrusion depth on the shell surface and the device holding posture based on the conductivity change characteristics at the bottom of the walkie-talkie shell and the spatial coordinate data calculated by the triaxial microelectromechanical accelerometer. It identifies the concurrent overlapping state of water alarm and fall alarm and generates an emergency hazard judgment matrix. Based on the emergency situation determination matrix, the backup radio frequency link activation and configuration module matches the radio frequency front-end transmit power level and antenna VSWR response limit under the corresponding emergency situation level. When the regular mobile data communication service is interrupted due to environmental shielding or base station damage, it automatically starts a backup radio frequency signal independent of the main channel and generates a backup radio frequency signal transmission configuration instruction set. The signal attenuation compensation module calculates the penetration loss and spatial coverage radius reduction of the backup radio frequency signal under the cover of water or the obstruction of a fallen human body, based on the backup radio frequency signal transmission configuration instruction set. It also calculates the electromagnetic wave transmission obstruction compensation amount in combination with the receiving sensitivity of the search and rescue base station, and obtains the search and rescue signal gain compensation trajectory. The charging and draining scheduling and energy limit extraction module calls the search and rescue signal gain compensation trajectory. When the walkie-talkie is connected to the centralized charging base or multi-source power supply interface, it assesses the current danger level and the decay rate of the remaining charge, triggers the walkie-talkie charging and draining scheduling mechanism, and outputs the walkie-talkie emergency alarm process utilization rate control index.

2. The walkie-talkie based on emergency alarm function according to claim 1, characterized in that: The emergency hazard judgment matrix includes conductivity variation, liquid intrusion depth level, and electrode contact current frequency. The backup radio frequency signal transmission configuration instruction set includes power amplifier bias current adjustment value, antenna matching network switching point, and radio frequency output gain index. The search and rescue signal gain compensation trajectory includes penetration loss compensation gradient, radiation radius expansion coefficient, and spatial beam pointing parameters. The walkie-talkie emergency alarm process utilization control indicators include multi-source power supply switching lag time, charge consumption synchronization interval, and energy dispatch recovery cycle.

3. The walkie-talkie based on emergency alarm function according to claim 1, characterized in that: The environment and attitude change perception module includes: The conductivity electrode water tracking submodule is based on the conductivity electrode distribution at the bottom of the walkie-talkie. It extracts the short-circuit current and impedance drop values ​​between the electrodes, identifies the submersion depth and intrusion rate of the liquid above the electrodes, triggers the water alarm logic, and obtains the water intrusion parameters. The disability posture analysis submodule analyzes the gravitational acceleration vector distribution of the walkie-talkie in the spatial dimension, extracts the motion trajectory of the device from a vertical fall to a long-term horizontal stillness, determines the conditions for uncontrolled throwing and falling alarm caused by heatstroke or fainting, and obtains the falling disability characterization vector. The hazard feature fusion submodule calls the water intrusion parameter and the fall and disability characterization vector to calculate the coupling density of the two on the time axis, define the critical priority of single hazards and compound hazards, and generate an emergency hazard judgment matrix.

4. The walkie-talkie based on emergency alarm function according to claim 3, characterized in that: The backup RF link activation and configuration module includes: Based on the emergency situation determination matrix, the water intrusion parameter quantum module blocks the conventional communication channel according to the physical obstruction characteristics of the emergency, allocates low frequency or target search and rescue frequency bands as backup radio frequency signal carriers, and obtains a frequency band scheduling priority list. The antenna impedance dynamic matching submodule, based on the frequency band scheduling priority list, tunes the inductance-capacitance matrix of the antenna matching network to suppress abnormal rises in the standing wave ratio and obtain the RF end impedance tuning parameters in response to physical displacement caused by falling or parasitic capacitance changes caused by falling into water. The transmit configuration generation submodule sets the initial power amplification bias and pulse transmission interval of the backup RF signal according to the RF terminal impedance tuning parameters, and generates a backup RF signal transmit configuration instruction set.

5. The walkie-talkie based on emergency alarm function according to claim 4, characterized in that: The signal attenuation compensation module includes: The space penetration loss calculation submodule analyzes the power dissipation decibels of the current transmission frequency under the conditions of water surface diffuse reflection, human body torso obstruction and ground soil attenuation according to the backup radio frequency signal transmission configuration instruction set, and obtains the dielectric loss attenuation gradient. Based on the dielectric loss attenuation gradient, the radiation beam reconstruction submodule adjusts the phase feed of the transmitter to change the spatial radiation pattern of the signal and obtains the spatial beam reconstruction parameters, addressing the issue of the antenna orientation deviating from the ideal vertical polarization direction under the grounded state. The gain trajectory planning submodule combines the dielectric loss attenuation gradient and spatial beam reconstruction parameters to progressively deduce the signal's reach boundary in the search and rescue space, set the corresponding power compensation step amount for each time, and obtain the search and rescue signal gain compensation trajectory.

6. The walkie-talkie based on emergency alarm function according to claim 5, characterized in that: The energy allocation and scheduling and energy maximization module includes: The priority charging decision submodule calls the search and rescue signal gain compensation trajectory. When the device is connected to a multi-slot charging device, it compares the alarm level of the surrounding walkie-talkies in the same group, disconnects the charging current of the regular equipment, grants the charging permission to the currently distressed walkie-talkie, and obtains the charging channel priority allocation map. The RF power consumption calculation submodule extracts the instantaneous discharge peak value of the backup RF signal when performing gain compensation exceeding the preset compensation amount according to the charging channel priority allocation map, analyzes the battery impedance anti-disturbance capability when it occurs simultaneously with current charging above the first preset threshold, and obtains the charging and discharging heat dissipation boundary. The battery life index synthesis submodule locks the voltage drop preset threshold and charging supply amount to ensure continuous transmission of search and rescue pulses based on the charging and discharging heat dissipation boundary, and outputs the controlled index of walkie-talkie emergency alarm process utilization.

7. The walkie-talkie based on emergency alarm function according to claim 6, characterized in that: The voltage drop preset threshold and charging supply for ensuring continuous transmission of search and rescue pulses refer to monitoring the pulse drop amplitude of the battery terminal voltage during the gain compensation trajectory of transmitting search and rescue signals within the boundary of charge and discharge heat dissipation. The operating voltage that maintains the RF phase-locked loop locking operation is set as the voltage drop preset threshold, and the required compensation charging current pulse width is calculated in reverse based on the voltage drop preset threshold to determine the charging supply that satisfies energy balance.

8. The walkie-talkie based on emergency alarm function according to claim 1, characterized in that: The walkie-talkie also includes an extreme search and rescue response and stability maintenance module: The extreme search and rescue response stability module identifies the hardware local overload phenomenon caused by the superposition of continuous transmission of high-gain backup radio frequency signal and priority charging above the preset current threshold based on the controlled index of the walkie-talkie emergency alarm process. It extracts the power derating trigger time and frequency switching sequence of overload suppression and generates a walkie-talkie search and rescue communication stability optimization strategy. The walkie-talkie search and rescue communication stability optimization strategy includes emergency power derating threshold, minimum frequency switching interval, and multi-source power supply diversion trigger conditions.

9. The walkie-talkie based on emergency alarm function according to claim 8, characterized in that: The extreme search and rescue response and stabilization module includes: The power amplifier overload suppression submodule monitors the temperature rise slope of the backup RF transmission and charge / discharge in parallel, based on the controlled index of the walkie-talkie emergency alarm process utilization, and sets the thermal protection power reduction trigger point of the RF power amplifier module to obtain the derating transmission protection threshold. The backup frequency switching timing allocation submodule allocates the sleep and wake-up cycles of multiple backup channels for polling transmission based on the derating transmission protection threshold, in order to address the overheating of the resonant cavity caused by transmission at a single frequency point exceeding the time threshold, thereby obtaining the frequency switching duty cycle sequence. The stability maintenance strategy generation submodule analyzes the communication maintenance guidelines under preset power supply constraints and preset environmental indicators based on the frequency switching duty cycle sequence, and generates a walkie-talkie search and rescue communication stability optimization strategy.

10. A working method based on an emergency alarm function, characterized in that, The walkie-talkie based on the emergency alarm function according to any one of claims 1-9 is executed by including the following steps: S1: Based on the changes in the conductivity of the walkie-talkie casing and the internal three-axis motion coordinates, track the overlapping time period of water intrusion and human heatstroke, fainting and falling to the ground, trigger water alarm and fall alarm, and generate an emergency situation judgment matrix. S2: Based on the emergency situation determination matrix, block regular communication and activate the backup radio frequency signal, match the antenna impedance and transmission power of the radio frequency front end, and generate a backup radio frequency signal transmission configuration instruction set; S3: Based on the backup radio frequency signal transmission configuration instruction set, calculate the attenuation of the signal radiation coverage radius by the medium of the fallen and water-fallen objects, perform spatial beam polarization reconstruction, and generate a search and rescue signal gain compensation trajectory. S4: Based on the search and rescue signal gain compensation trajectory, activate the walkie-talkie charging permission when the device is seated for charging, calculate the energy utilization extreme value under the concurrent charging and discharging state, and output the walkie-talkie emergency alarm process utilization rate control index. S5: Based on the controlled index of the walkie-talkie emergency alarm process utilization, suppress the local overheating caused by current discharge exceeding the first preset threshold and high gain transmission, allocate frequency switching sleep and power derating timing, and generate a walkie-talkie search and rescue communication stability optimization strategy.

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