Internet mobile communication-based one-key emergency call device for disabled and old people

Abstract

The invention discloses a one-key emergency call device for disabled and old people based on Internet mobile communication, and relates to the technical field of emergency call equipment, the one-key emergency call device comprises a main control module, a trigger module, a communication module, a positioning module and a data storage module, the trigger module comprises an entity emergency call button, a fall monitoring unit and a heart rate monitoring unit; when the entity emergency call is pressed, a first trigger signal is generated; the fall monitoring unit generates a second trigger signal; the heart rate monitoring unit generates a third trigger signal; and after receiving the trigger signal, the main control module starts emergency response in a grading manner, acquires current position information, extracts basic disease information of a user and an emergency contact person, and establishes a three-party real-time communication link among an emergency center, the emergency contact person and the device. According to the invention, the problems of single triggering and poor reliability during emergency calling of the disabled old people are solved, the rescue decision time is shortened, and a more reliable technical guarantee is provided for life safety of the disabled old people.

Description

Technical Field

[0001] This invention relates to the field of emergency call equipment technology, and more specifically, to a one-button emergency call device for disabled elderly people based on Internet mobile communication. Background Technology

[0002] With the accelerating aging of the global population, the number of disabled and elderly people living alone in my country continues to expand. Due to limitations in physical activity, sensory decline (such as blurred vision and hearing loss), and the prevalence of underlying diseases (such as hypertension, diabetes, and cardiovascular diseases), this group faces higher risks of sudden emergencies in daily life—such as fractures or coma due to accidental falls, or loss of consciousness due to acute cardiovascular events. If timely assistance is not obtained in such emergencies, the condition can easily worsen or even become life-threatening, making the need for real-time and reliable emergency call support particularly urgent. Currently, emergency call devices on the market are mainly divided into two categories: one is traditional fixed call devices (such as one-button wall-mounted devices), which rely on wired telephone networks and can only achieve the basic function of "one-button dialing of a preset number." Furthermore, their fixed location limits their ability to meet the needs of elderly people calling for help in mobile scenarios. The other category is portable wearable devices (such as bracelets and pendants), which, while supporting mobile use, have many compatibility deficiencies in practical applications. Emergency call devices, as an important safety tool, have been widely used in elderly care scenarios, but their functional design still has insufficient adaptability to the actual needs of disabled elderly people.

[0003] The shortcomings of existing technologies include: most devices rely solely on pressing a button to trigger an emergency call, which cannot address scenarios where disabled elderly people are unable to operate actively due to falls, loss of consciousness, or other reasons; while some devices integrate fall or heart rate monitoring functions, the simple logic of a single sensor makes them prone to misinterpreting everyday actions (such as bending over) as falls or triggering emergency calls due to brief fluctuations in heart rate, and may also miss genuine emergencies due to algorithmic flaws; reliance on a single cellular network makes it easy for emergency calls to fail in remote areas or signal blind spots; emergency centers may find it difficult to quickly obtain crucial information such as the elderly person's underlying medical conditions and allergies when receiving a call, delaying rescue decisions; and using the same response procedure for signals of different urgency levels (such as active help requests, suspected falls, and simple heart rate abnormalities) can easily lead to a waste of emergency resources or delays in emergency situations.

[0004] To address the above problems, this invention proposes a solution. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a one-button emergency call device for disabled elderly people based on Internet mobile communication. By integrating a physical emergency call button, a fall detection unit, and a heart rate monitoring unit, it achieves multi-dimensional emergency triggering. It combines cellular + satellite dual-mode communication to ensure signal stability, pre-stores basic user medical information, and links emergency centers and emergency contacts. At the same time, it adopts a graded response mechanism to reduce false triggering, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A one-button emergency call device for disabled elderly people based on Internet mobile communication includes a main control module, and a trigger module, a communication module, a positioning module and a data storage module electrically connected to the main control module respectively:

[0008] The triggering module includes a physical emergency call button, a fall detection unit, and a heart rate monitoring unit;

[0009] The physical emergency call button has a raised anti-slip structure and generates a first trigger signal when pressed; the fall detection unit is used to detect falls of disabled elderly people and generates a second trigger signal by collecting and analyzing motion characteristic parameters during human movement; the heart rate monitoring unit collects user heart rate data in real time and generates a third trigger signal when the heart rate deviates from the preset normal range and the duration of the deviation exceeds a set time threshold.

[0010] Upon receiving a trigger signal, the main control module initiates a tiered emergency response, controls the positioning module to obtain the current location information, retrieves pre-stored basic medical information and emergency contacts from the data storage module, dials an emergency number and sends the location and basic medical information to the emergency center system via the communication module, sends a notification containing location and request for help to the emergency contacts, and establishes a three-way real-time communication link between the emergency center, the emergency contacts, and the device.

[0011] In a preferred embodiment, the physical emergency call button is a silicone raised button with a built-in piezoresistive sensor, an anti-slip texture engraved on the surface, and a spring reset structure at the bottom.

[0012] In a preferred embodiment, the process of generating the first trigger signal when pressed is as follows:

[0013] The system collects the pressing pressure and duration in real time, and generates a first trigger signal based on the physical emergency call button's trigger condition. The expression for the physical emergency call button's trigger condition is as follows:

[0014]

[0015] Wherein, S1 represents the trigger condition of the physical emergency call button. When S1=1, the first trigger signal is generated. F is the pressing pressure, F0 is the minimum effective pressure, t is the pressing duration, and t0 is the anti-accidental touch threshold.

[0016] After the trigger signal is generated, the built-in LED on the button flashes, and the device vibrates to indicate to the user that the operation has taken effect.

[0017] In a preferred embodiment, when the fall detection unit identifies a fall action through multi-dimensional motion parameters, it needs to capture motion characteristics in real time and make accurate judgments using sensors, including a three-axis accelerometer, a three-axis gyroscope, and a three-axis magnetometer.

[0018] In a preferred embodiment, the triaxial accelerometer is used to collect the acceleration of the human body during movement; the triaxial gyroscope is used to collect the angular velocity; and the triaxial magnetometer is used to assist in attitude angle calibration.

[0019] In a preferred embodiment, the process of generating a second trigger signal by collecting and analyzing motion characteristic parameters during human movement is as follows:

[0020] The data collected by the triaxial accelerometer, triaxial gyroscope and triaxial magnetometer are filtered. Based on the filtered data, key features reflecting the fall are extracted, including the resultant acceleration amplitude, the rate of change of angular velocity and the total attitude angle offset.

[0021] The combined acceleration amplitude, angular velocity rate of change, and total attitude angle offset are normalized and then weighted and summed to obtain the comprehensive score. The calculation formula is as follows:

[0022] S total =0.4S A +0.3S Ω +0.3S θ ;

[0023] In the formula, S total It is the overall score, S A It is the normalized resultant acceleration amplitude, S Ω It is the normalized rate of change of angular velocity, S θ It is the total attitude angle offset after normalization;

[0024] When the overall score exceeds the preset score threshold, a second trigger signal is generated.

[0025] In a preferred embodiment, the process of generating the third trigger signal is as follows: the pulse wave signal is acquired, the effective waveform is extracted by bandpass filtering, the adjacent R wave interval T is calculated by peak detection, 60 is divided by the adjacent R wave interval T to obtain the instantaneous heart rate, and the heart rate data is smoothed by using a sliding window to obtain the smoothed heart rate.

[0026] When used for the first time, resting heart rate data is collected over a certain time period. The mean and standard deviation are calculated to establish a personalized normal range. When the smoothed heart rate exceeds the range and the duration is ≥30s, a third trigger signal is generated.

[0027] In a preferred embodiment, after receiving a trigger signal, the main control module initiates a tiered emergency response process as follows:

[0028] Upon receiving the first trigger signal or simultaneously receiving the second and third trigger signals, no further verification is required; a Level 1 response is initiated directly, and the full emergency response process is immediately activated.

[0029] When only the second trigger signal is received, false positives are filtered out by user confirmation.

[0030] When only the third trigger signal is received, emergency rescue is not initiated directly. Only when the heart rate abnormality lasts for ≥30 seconds and the accelerometer detects no obvious movement, a secondary response is initiated and a heart rate abnormality alert is sent to the emergency contact. An emergency call is only triggered after the contact calls back the device and confirms that emergency rescue is needed.

[0031] In a preferred embodiment, after receiving only the second trigger signal, false positives are filtered out by user confirmation, as follows:

[0032] Upon receiving the second trigger signal, the device immediately vibrates and provides a voice prompt: "A fall has been detected. Do you need help? Please press the emergency button to confirm. If there is no response within 15 seconds, it will automatically call for help."

[0033] If the user presses the confirmation button within 15 seconds, the response will be upgraded to Level 1 and the full emergency procedure will be executed; if the user presses the "Cancel" button, the response will be terminated and only the fall event will be recorded in the log.

[0034] If there is no action within 15 seconds, the user is assumed to be disabled, and the first-level response process is automatically initiated. The push notification will mark the user as "fall unconfirmed, suspected disability" and prompt the emergency center to dispatch an ambulance.

[0035] In a preferred embodiment, the process by which the positioning module obtains the current location information is as follows:

[0036] The main control module sends instructions to the Beidou + GPS dual-mode positioning module, and the module returns the latitude and longitude after receiving the satellite signals;

[0037] Using a built-in GIS database, latitude and longitude are converted into "province-city-district-street" level addresses, with the house number estimated through regional road coordinate calibration, thereby obtaining the current location information.

[0038] The technical effects and advantages of this invention, a one-button emergency call device for disabled elderly people based on Internet mobile communication:

[0039] 1. This invention constructs a multi-dimensional emergency triggering system by integrating a physical emergency call button, a fall detection unit, and a heart rate monitoring unit. Combined with a tiered response mechanism, it achieves accurate identification and differentiated handling of emergency situations. The physical button ensures an immediate response to user-initiated calls for help; fall detection reduces false alarms through a multi-parameter fusion algorithm using acceleration, angular velocity, and other parameters; and heart rate monitoring filters physiological fluctuations based on personalized benchmarks and duration verification. The tiered response logic directly initiates the full emergency rescue process for proactively triggered signals, adds a local confirmation step for fall signals, and only notifies emergency contacts for simple abnormal heart rate signals when multiple verifications are met. This ensures timely response in high-risk scenarios such as proactive calls for help and falls, while significantly reducing the waste of emergency resources caused by false triggers. It is fully adapted to the characteristics of disabled elderly people with limited mobility and prone to sudden dangers.

[0040] 2. This invention solves the problems of insufficient communication reliability and information gaps in traditional devices by using a dual-mode cellular + satellite communication module with pre-stored medical information and real-time three-way communication. Dual-mode communication automatically switches to satellite communication when cellular signals are weak or in dead zones, ensuring uninterrupted emergency calls in remote areas and complex environments. Pre-stored user information such as basic medical conditions and allergies is automatically pushed to the emergency center upon a call. Combined with a three-way voice link between the emergency center, emergency contacts, and the device, medical personnel can quickly grasp the patient's medical history, and emergency contacts can participate in rescue communication simultaneously. This significantly shortens rescue decision-making time, improves the targeting and efficiency of rescue efforts, and provides more reliable technical protection for the lives of disabled elderly people. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a one-button emergency call device for disabled elderly people based on Internet mobile communication according to the present invention. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1, Figure 1 This invention presents a one-button emergency call device for disabled elderly people based on Internet mobile communication.

[0044] The triggering module includes a physical emergency call button, a fall detection unit, and a heart rate monitoring unit;

[0045] The physical emergency call button has a raised anti-slip structure and generates a first trigger signal when pressed.

[0046] The physical emergency call button is a 3cm diameter silicone raised button with a built-in piezoresistive sensor, an anti-slip texture engraved on the surface (0.5mm deep), and a spring reset structure at the bottom.

[0047] The sensor collects the pressing pressure and duration in real time, and generates a first trigger signal based on the trigger conditions of the physical emergency call button. The expression for the trigger conditions of the physical emergency call button is as follows:

[0048]

[0049] Wherein, S1 represents the trigger condition of the physical emergency call button. When S1=1, the first trigger signal is generated. F is the pressing pressure, F0 is the minimum effective pressure, t is the pressing duration, and t0 is the anti-accidental touch threshold.

[0050] After the trigger signal is generated, the built-in LED on the button flashes (frequency 2Hz), and the device vibrates (amplitude 0.5mm, lasting 1s) to indicate to the user that the operation has taken effect.

[0051] The physical emergency call button features a raised, non-slip structure, designed to be easily operable by elderly people with disabilities. The raised design allows those with poor eyesight or sensitive touch to quickly locate the button by touch, while the non-slip material reduces accidental operation due to trembling or wet hands, ensuring stable triggering in emergencies. As an active triggering method, the initial trigger signal directly reflects the elderly person's clear intention to seek help, avoiding delays in assistance due to mobility issues or confusion. This provides "elderly-led" emergency response assurance and solves the problems of traditional buttons being hidden and difficult to operate.

[0052] The fall monitoring unit is used to detect falls in elderly people with disabilities and generates a second trigger signal by collecting and analyzing motion characteristic parameters during human movement.

[0053] The fall detection unit identifies fall actions through multi-dimensional motion parameters and generates a secondary trigger signal. Falls can cause serious consequences such as fractures and coma for disabled elderly people, so it is necessary to capture motion characteristics in real time and make accurate judgments. The specific process is as follows:

[0054] The sensor uses a 9-axis IMU module, including a three-axis accelerometer, which is used to collect the acceleration of the human body during movement and reflect the impact intensity when falling;

[0055] A three-axis gyroscope is used to collect angular velocity, reflecting the intensity of the body's rotation;

[0056] A triaxial magnetometer assists in attitude angle calibration, reducing drift errors;

[0057] Sensor data may contain noise such as hand tremors and slight equipment shaking. It needs to be processed by "improved moving average filtering". The detected acceleration and angular velocity are weighted by the current sample value and the filtered value of the previous moment to obtain the current filtered data.

[0058] Based on the filtered data, three key features reflecting a fall are extracted, including the resultant acceleration amplitude, the rate of change of angular velocity, and the total attitude angle offset.

[0059] The combined acceleration amplitude, angular velocity rate of change, and total attitude angle offset are normalized and then weighted and summed to obtain the comprehensive score. The calculation formula is as follows:

[0060] S total =0.4S A +0.3S Ω +0.3S θ

[0061] In the formula, S total It is the overall score, S A It is the normalized resultant acceleration amplitude, S Ω It is the normalized rate of change of angular velocity, S θ It is the total attitude angle offset after normalization.

[0062] When the overall score is greater than the preset score threshold, a second trigger signal S2 = 1 is generated.

[0063] The fall detection unit generates a second trigger signal by collecting and analyzing human motion characteristic parameters (such as acceleration, angular velocity, and posture angle), which can passively detect falls—especially for disabled elderly people who may fall and become unconscious, suffer fractures, or be unable to actively call for help, thus achieving "automatic response when no one is there to help." Multi-dimensional analysis of motion characteristic parameters (rather than a single indicator) can effectively distinguish falls from daily actions (such as bending over or sitting down), significantly reducing the false trigger rate. This avoids missing genuine fall hazards, reduces unnecessary emergency activation, and improves the reliability of monitoring.

[0064] The heart rate monitoring unit collects the user's heart rate data in real time. When the heart rate is detected to deviate from the preset normal range and the duration of the deviation is greater than the set time threshold, a third trigger signal is generated.

[0065] A green PPG sensor (525nm) was used to collect pulse wave signals at a sampling rate of 20Hz. After bandpass filtering to extract the effective waveform, the interval T between adjacent R waves was calculated by peak detection to obtain the instantaneous heart rate. A 5s sliding window (average 10 sampling points) was used to smooth the heart rate data to obtain the smoothed heart rate.

[0066] When used for the first time, 7 days of resting heart rate data are collected, the mean and standard deviation are calculated, and a personalized normal range is established. When the smoothed heart rate falls out of the range and the duration is ≥30s, a third trigger signal S3=1 is generated.

[0067] Heart rate is defined as "the number of times the heart beats per minute". The time interval (T) between two adjacent R waves (the main peak of the QRS complex in an electrocardiogram, representing the electrical activity of ventricular contraction) is exactly the duration of a "cardiac cycle" (i.e. the time of one heartbeat), usually measured in seconds (s).

[0068] Therefore, if the duration of a cardiac cycle is known to be T (seconds), then:

[0069] Heart rate in 1 second = 1 / T (beats / second);

[0070] Heart rate in 1 minute (60 seconds) = 60 × (1 / T) = 60 / T (beats / minute).

[0071] The heart rate monitoring unit collects heart rate data in real time and generates a third trigger signal based on "deviation from the normal range + duration threshold," which can detect potential cardiovascular emergencies (such as arrhythmias and precursors to myocardial infarction) in advance. The "duration judgment" can filter out short-term physiological fluctuations (such as heart rate changes caused by emotional excitement or brief activity), reducing false triggers; while the sensitive monitoring of long-term abnormalities can help disabled elderly people detect hidden health risks in a timely manner, making up for their weak self-health perception ability and adding an extra layer of protection for cardiovascular and cerebrovascular safety.

[0072] After receiving the first, second, and third trigger signals, the main control module analyzes the signals and initiates an emergency response in stages based on the analysis results. It controls the positioning module to obtain the current location information, retrieves the pre-stored basic medical information and emergency contacts from the data storage module, dials an emergency number through the communication module and sends the location information and basic medical information to the emergency center system, sends a notification containing location information and request for help to the emergency contacts, and establishes a three-way real-time communication link between the emergency center, the emergency contacts, and the device.

[0073] After receiving the trigger signal, the main control module records the signal arrival timestamp, analyzes the signal, and initiates a tiered response based on the analysis results, as follows:

[0074] Upon receiving the first trigger signal (pressing the physical button) or simultaneously receiving the second and third trigger signals, no further verification is required; the system is immediately identified as having a "clear emergency need," triggering a Level 1 response and initiating the full emergency response process.

[0075] After receiving only the second trigger signal (fall detection), false alarms need to be filtered out through "user confirmation" (such as an elderly person bending down to pick up an item being falsely identified as a fall). The process is as follows:

[0076] The device immediately vibrates (3 strong vibrations) and provides a voice prompt ("Fall detected. Do you need help? Please press the emergency button to confirm. If there is no response within 15 seconds, it will automatically call for help").

[0077] If the user presses the button to confirm within 15 seconds, the response will be upgraded to Level 1 and the full emergency procedure will be executed.

[0078] If the user presses the "Cancel" button (optional accessibility button), the response will be terminated, and only the fall event will be logged.

[0079] If there is no action within 15 seconds (assuming the user is disabled), the Level 1 response process will be automatically initiated, but the push notification will be marked as "Fall unconfirmed, suspected disability", prompting the emergency center to dispatch an ambulance first;

[0080] Upon receiving the third trigger signal, a level two response is initiated, sending an "abnormal heart rate alert" to the emergency contact. Only after the contact calls back the device and confirms "emergency assistance is needed" can the contact remotely trigger a 120 call.

[0081] It should be noted that the fall detection algorithm has a false alarm rate of approximately 2%-5% (e.g., when someone sits or lies down quickly). A 15-second confirmation period filters out over 80% of false triggers, while ensuring timely rescue in situations where the person is unconscious or unable to act. Through a "tiered emergency response" mechanism, different trigger signals are handled differently based on their urgency: the highest priority response is initiated immediately for the first trigger signal (active help), ensuring the elderly person's clear need for help is met immediately; for the second trigger signal (fall), a local confirmation step (e.g., a 15-second voice inquiry) is added to balance the necessity of passive detection with the need to reduce false alarms; for the third trigger signal (abnormal heart rate), emergency contacts are notified first, rather than directly calling emergency services, to avoid simply consuming emergency resources due to physiological fluctuations. This tiered logic ensures timely rescue in high-risk scenarios (e.g., active calls for help, falls that are unresponsive) while reducing the waste of emergency resources by filtering non-emergency signals, thus meeting the diverse emergency needs of disabled elderly people.

[0082] Location data acquisition: The main control module sends instructions to the Beidou + GPS dual-mode positioning module. After receiving the satellite signals, the module returns the latitude and longitude, with a positioning response time of ≤3s. Through the built-in GIS (Geographic Information System) database, the latitude and longitude are converted into a "province-city-district-street" level address, where the house number is estimated by calibrating the regional road coordinates.

[0083] Real-time, accurate location information (latitude and longitude + structured address) solves the problem of "difficulty in locating and rescuing" elderly people with disabilities due to their fixed range of movement (such as at home) or memory decline (getting lost when out and about). Emergency centers can plan the shortest route based on the location, and emergency contacts can quickly arrive at the scene. Especially for elderly people living alone, accurate location information can shorten rescue time by more than 30%, buying precious time for the golden rescue period.

[0084] Two key types of information are extracted from the encrypted Flash storage module (capacity ≥128KB, supports AES-256 encryption): Basic user medical information: in JSON format, including disease type (e.g., "hypertension," "diabetes"), allergy history (e.g., "penicillin allergy"), and medication records (e.g., "nifedipine, twice daily"); and an emergency contact list: up to 5 groups, each containing name, phone number, and relationship. Medical data and contact information are stored in encrypted Flash, encrypted using the national standard SM4 algorithm. The key is generated by hashing the device IMEI code and user PIN code using the SM3 hash algorithm.

[0085] Pre-stored user basic medical information (such as hypertension, allergy history, and medication records) and emergency contact list enable "pre-emptive emergency information transmission": When the emergency center receives an alarm, it can immediately obtain the elderly person's medical history, avoiding medication risks caused by the elderly person being unable to communicate due to being in a coma (such as the prohibition of related drugs for those allergic to penicillin), and improving the targeted nature of rescue; the emergency contact information ensures that family members can know the situation as soon as possible and participate in the rescue cooperation (such as supplementing the elderly person's recent health status), solving the information gap problem of traditional devices "only notifying the emergency center, with family members being informed later".

[0086] Emergency Center Communication: The main control module controls the 4G / 5G communication module to dial 120 (emergency services). Simultaneously, it pushes information packets via the HL7FHIR medical data exchange protocol, including: location information (latitude and longitude, structured address), encrypted basic disease information, trigger type, and device battery level (to prevent communication interruption due to power failure). It also sends dual notifications to contacts: SMS messages and app push notifications (including a link to a real-time location map).

[0087] After dialing 120 and notifying contacts, a three-way voice call (device-emergency center-contact) is automatically established within 10 seconds, achieving high-definition voice communication via VoLTE technology (delay < 300ms). If the cellular signal is weak (RSRP < -105dBm, i.e., signal strength ≤ 1 bar), it automatically switches to Tiantong-1 satellite communication to send a concise distress call.

[0088] By dialing emergency numbers, sending information, and establishing a three-way real-time communication link, "multi-terminal collaborative rescue" is achieved: directly calling the emergency center ensures rapid intervention by professional rescue forces; sending a distress notification with location information to emergency contacts allows family members to stay informed; and the three-way communication (elderly person-emergency center-family) allows family members to supplement information in real time (such as whether the elderly person is currently alone or if there have been any recent changes in their condition), helping medical personnel to develop rescue plans in advance. If integrated with cellular + satellite dual-mode communication, it can also ensure uninterrupted emergency calls in remote areas and signal blind spots, solving the "signal dead zone" problem of traditional single-mode communication and improving the reliability of rescue in extreme environments.

[0089] Through the above process, the device ensures that high-risk scenarios such as active help requests and falls are responded to in a timely manner, and reduces false triggers of heart rate abnormalities through multi-dimensional verification, achieving the core goal of "no delay in emergencies and no waste of resources in non-emergency situations", and fully adapting to the usage needs of disabled elderly people.

[0090] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0091] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0092] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0093] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0094] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0095] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A one-button emergency call device for disabled elderly people based on Internet mobile communication, characterized in that, It includes a main control module, and a trigger module, a communication module, a positioning module, and a data storage module, which are electrically connected to the main control module respectively: The triggering module includes a physical emergency call button, a fall detection unit, and a heart rate monitoring unit; The physical emergency call button has a raised anti-slip structure and generates a first trigger signal when pressed; the fall detection unit is used to detect falls of disabled elderly people and generates a second trigger signal by collecting and analyzing motion characteristic parameters during human movement; the heart rate monitoring unit collects user heart rate data in real time and generates a third trigger signal when the heart rate deviates from the preset normal range and the duration of the deviation exceeds a set time threshold. Upon receiving a trigger signal, the main control module initiates a tiered emergency response, controls the positioning module to obtain the current location information, retrieves pre-stored basic medical information and emergency contacts from the data storage module, dials an emergency number and sends the location and basic medical information to the emergency center system via the communication module, sends a notification containing location and request for help to the emergency contacts, and establishes a three-way real-time communication link between the emergency center, the emergency contacts, and the device.

2. The one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 1, characterized in that, The physical emergency call button is a silicone raised button with a built-in piezoresistive sensor, an anti-slip texture engraved on the surface, and a spring reset structure at the bottom.

3. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 2, characterized in that, The process of generating the first trigger signal when pressed is as follows: The system collects the pressing pressure and duration in real time, and generates a first trigger signal based on the physical emergency call button's trigger condition. The expression for the physical emergency call button's trigger condition is as follows: Wherein, S1 represents the trigger condition of the physical emergency call button. When S1=1, the first trigger signal is generated. F is the pressing pressure, F0 is the minimum effective pressure, t is the pressing duration, and t0 is the anti-accidental touch threshold. After the trigger signal is generated, the built-in LED on the button flashes, and the device vibrates to indicate to the user that the operation has taken effect.

4. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 3, characterized in that, When the fall detection unit identifies a fall by using multi-dimensional motion parameters, it needs to capture motion characteristics in real time and make accurate judgments using sensors, including a three-axis accelerometer, a three-axis gyroscope, and a three-axis magnetometer.

5. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 4, characterized in that, The triaxial accelerometer is used to collect the acceleration of the human body during movement; the triaxial gyroscope is used to collect the angular velocity; and the triaxial magnetometer is used to assist in attitude angle calibration.

6. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 5, characterized in that, The process of generating a second trigger signal by collecting and analyzing motion characteristic parameters during human movement is as follows: The data collected by the triaxial accelerometer, triaxial gyroscope and triaxial magnetometer are filtered. Based on the filtered data, key features reflecting the fall are extracted, including the resultant acceleration amplitude, the rate of change of angular velocity and the total attitude angle offset. The combined acceleration amplitude, angular velocity rate of change, and total attitude angle offset are normalized and then weighted and summed to obtain the comprehensive score. The calculation formula is as follows: S total =0.4S A +0.3S Ω +0.3S θ ; In the formula, S total It is the overall score, S A It is the normalized resultant acceleration amplitude, S Ω It is the normalized rate of change of angular velocity, S θ It is the total attitude angle offset after normalization; When the overall score exceeds the preset score threshold, a second trigger signal is generated.

7. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 6, characterized in that, The process of generating the third trigger signal is as follows: The pulse wave signal is collected, and the effective waveform is extracted by bandpass filtering. The interval T between adjacent R waves is calculated by peak detection. The instantaneous heart rate is obtained by dividing 60 by the interval T. The heart rate data is smoothed by using a sliding window to obtain the smoothed heart rate. When used for the first time, resting heart rate data is collected over a certain time period. The mean and standard deviation are calculated to establish a personalized normal range. When the smoothed heart rate exceeds the range and the duration is ≥30s, a third trigger signal is generated.

8. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 1, characterized in that, Upon receiving the trigger signal, the main control module initiates the emergency response process in stages as follows: Upon receiving the first trigger signal or simultaneously receiving the second and third trigger signals, no further verification is required; a Level 1 response is initiated directly, and the full emergency response process is immediately activated. When only the second trigger signal is received, false positives are filtered out by user confirmation. When only the third trigger signal is received, the second-level response is initiated, and an abnormal heart rate alert is sent to the emergency contact. An emergency call is triggered only after the contact calls back the device and confirms that emergency medical assistance is needed.

9. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 8, characterized in that, After receiving only the second trigger signal, false positives are filtered out through user confirmation. The process is as follows: Upon receiving the second trigger signal, the device immediately vibrates and provides a voice prompt: "A fall has been detected. Do you need help? Please press the emergency button to confirm. If there is no response within 15 seconds, it will automatically call for help." If the user presses the "Confirm" button within 15 seconds, the response will be upgraded to Level 1 and the full emergency procedure will be executed; if the user presses the "Cancel" button, the response will be terminated and only the fall event will be recorded in the log. If there is no action within 15 seconds, the user is assumed to be disabled, and the first-level response process is automatically initiated. The push notification will mark the user as "fall unconfirmed, suspected disability" and prompt the emergency center to dispatch an ambulance.

10. A one-button emergency call device for disabled elderly people based on Internet mobile communication according to claim 9, characterized in that, The process by which the control and positioning module obtains the current location information is as follows: The main control module sends instructions to the Beidou + GPS dual-mode positioning module, and the module returns the latitude and longitude after receiving the satellite signals; Using a built-in GIS database, latitude and longitude are converted into "province-city-district-street" level addresses, with the house number estimated through regional road coordinate calibration, thereby obtaining the current location information.

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