Intelligent toilet seat life information parameter monitoring system and method

Abstract

The invention provides an intelligent toilet seat life information parameter monitoring system and method, the system is applied to a toilet, the system comprises an optical fiber sensing module and a piezoelectric sensing module, the optical fiber sensing module and the piezoelectric sensing module are used for collecting ballistocardiogram and phonocardiogram signals during defecation so as to monitor the heart rate and the respiration rate in real time; the infrared sensor or the microwave radar sensor and the infrared sensing module or the microwave radar bed module comprise defecation detection and fall monitoring probes and are used for defecation frequency detection and iterative judgment alarm; the blood oxygen monitoring module comprises a photoelectric detector and is used for monitoring a photoplethysmogram and blood oxygen fluctuation change of the heart cycle of the user in real time; the non-inductive transmission module is used for providing wireless transmission, uploading data monitored by the intelligent toilet seat to the data management system and displaying the data on a display screen; and the master controller is used for uploading the data monitored by the sensing module to a data management system. According to the invention, automatic monitoring of the defecation process is realized, and invisible health monitoring of old people is realized.

Description

Technical Field

[0001] The present invention relates to the field of medical and health care technology and the field of intelligent household appliance technology, and in particular to a system and method for monitoring vital information parameters of an intelligent toilet seat. Background Art

[0002] The Outline of the Healthy China 2030 Plan emphasizes the development of smart medical care and smart elderly care. Major technology companies have developed a series of detection systems with life safety as the core. The "Silver Hair Safety Guardian Solution" developed by Tencent mainly relies on two types of smart devices, "Invisible Caregiver (Smart Care Camera)" and "Silver Age Guardian Card (Smart Positioning Hardware Device)", which mainly monitors the problems of falls and getting lost among the elderly. The "Smart Home" solution developed by Huawei provides home health and environmental safety monitoring through wearable devices and smart home devices. It is highly dependent on additional devices, which reduces the consciousness of the elderly wearing and relies on active wearing detection. Various types of equipment can guarantee some health needs of the elderly from multiple aspects, but the above rely on non-home and wearable external devices, and rely on the initiative and consciousness of the user, which is not suitable for the needs of the elderly for invisible smart health homes.

[0003] In 2015, Japan's TOTO demonstrated the Flowsky toilet that can perform urine tests. Subsequently, Panasonic also launched a similar product, which can mainly detect indicators such as protein, pH, occult blood, urine specific gravity, and creatinine in urine. However, the built-in monitoring chip box needs to be replaced periodically and divided differently according to the user population. In 2020, a professor at Stanford University developed a smart toilet seat that can analyze urine, feces, and defecation time, and preliminarily detect the user's urine and intestinal health, but it is only suitable for men. However, this type of product cannot guarantee the health of the elderly, nor can it provide early warning of adverse risk events.

[0004] In addition, during defecation, changes in chest and abdominal pressure and the vagal reflex induced by defecation can induce changes in heart rate and blood pressure, and the risk of induced arrhythmias and acute cardiovascular and cerebrovascular events is high. In 2019, researchers at the Rochester Institute of Technology (RIT) in the United States designed a smart toilet seat to facilitate heart failure patients to monitor their condition more comfortably at home and reduce the rate of re-hospitalization of patients. The seat can be used to measure the electrocardiogram (ECG) of the heart, the ballistocardiogram (BCG) to measure the mechanical forces associated with the cardiac cycle, and the photoplethysmogram (PPG) for measuring the heart cycle. However, such products tend to monitor the life safety of patients with chronic heart failure and are not suitable for health risk monitoring for the general public. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a smart toilet seat vital information parameter monitoring system and method, which adopts a new smart toilet seat monitoring system to realize automatic monitoring of the defecation process and realize invisible health monitoring for the elderly. Non-wearable contact devices improve the compliance of the elderly and reduce the additional burden of life. Utilizing the world's leading BCG third-generation technology, combined with phonocardiogram (PCG) and photoplethysmography (PPG) of the cardiac cycle, the noise reduction processing after signal acquisition can evaluate and warn of abnormal fluctuations and changes in vital information parameters such as respiratory heart rate, abnormal heart rhythm, dynamic blood pressure, and instantaneous posture changes during defecation.

[0006] According to a first aspect of the present invention, the present invention provides a smart toilet seat vital information parameter monitoring system, which is applied to a toilet, and the system comprises:

[0007] Piezoelectric sensor module, used to collect ballistocardiogram and phonocardiogram signals during defecation;

[0008] Fiber optic sensing module for real-time monitoring of heart rate and respiratory rate;

[0009] The piezoelectric sensing module is used in combination with the optical fiber sensing module to senselessly obtain the respiratory heart rate, abnormal heart rhythm and respiratory rate, wherein the senselessly obtaining the respiratory heart rate, abnormal heart rhythm and respiratory rate includes:

[0010] Extract the peak value of each heartbeat in a certain section of the heart rate signal, calculate the difference between these n peak values, take the median of these n-1 differences, and calculate the heart rate;

[0011] By combining heart rate with the phonocardiogram monitored by the fiber optic acoustic fiber membrane, abnormal heart rhythm is analyzed, and a certain section of the respiratory signal is subjected to fast Fourier calculation, and the frequency point with the largest amplitude in the range of 0.1HZ to 0.5HZ in the frequency domain signal is taken out to calculate the respiratory rate;

[0012] The system further comprises:

[0013] Infrared sensor module, including defecation detection probe and fall monitoring probe, used for defecation frequency detection and iterative judgment alarm;

[0014] A blood oxygen monitoring module, including a photodetector, a photoplethysmogram of the user's heart cycle, and real-time monitoring of blood oxygen saturation;

[0015] The infrared sensor module is used in conjunction with the blood oxygen monitoring module to obtain dynamic blood pressure without sensing, wherein the method of obtaining dynamic blood pressure without sensing includes:

[0016] A mathematical model between the delay time and blood pressure was established, and regression analysis was performed on the delay time and the diastolic and systolic blood pressures measured by a mercury sphygmomanometer to obtain the blood pressure calculation functions of the systolic and diastolic blood pressures, and the blood pressure values ​​were calculated.

[0017] Based on the above technical solution, the present invention can also make the following improvements.

[0018] Optionally, the system further includes a main control controller for uploading the data monitored by the sensor module to a data management system and displaying the data on a display screen.

[0019] Optionally, the main controller includes a main control circuit board, a display screen and a communication module; the main control circuit board is respectively connected to the display screen, the communication module, the optical fiber sensing module, the piezoelectric sensing module, the blood oxygen monitoring module and the infrared sensing module; the communication module transmits data with the management system via Bluetooth or WiFi, and uploads the data monitored by the smart toilet seat to the data management system; the display screen is used for displaying monitoring data.

[0020] Optionally, the piezoelectric sensing module includes a piezoelectric switch, a filtering circuit and a signal conditioning circuit. When the user sits on the smart toilet seat when using the toilet, the piezoelectric switch is pressurized to activate the switching function and send an electrical signal to the filtering circuit for processing. The signal conditioning circuit then transmits the signal to the main control circuit board. The main control circuit board receives the signal to activate the optical fiber sensor module, the blood oxygen monitoring module, and the infrared transmission module for data processing.

[0021] Optionally, the piezoelectric sensing module collects cardiac shock signals, phonocardiogram signals and photoplethysmogram signals in real time during defecation. The main control circuit board receives the signal to start the optical fiber sensing module, blood oxygen monitoring module and infrared sensing module, and processes the data. On this basis, machine learning, deep learning and large model algorithms are applied to effectively identify respiratory heart rate, abnormal heart rhythm, dynamic blood pressure and body movement.

[0022] Optionally, the fiber optic sensing module includes a light source generator, a photoelectric detector, a photoelectric signal processing circuit, a photoelectric microcontroller and a photoelectric data output module; when the user goes to the toilet, he sits on the smart toilet seat, and the pressure generated by the fluctuation of the user's femoral artery compresses the fiber optic sensor under the latex pad. The light source generator and the photoelectric detector transmit and capture changes in light in the fiber optic sensor, and the arterial fluctuation compresses the light phase changes generated by the fiber optic sensor. The photoelectric signal processing circuit converts the photoelectric signal into a pulse signal, which is then processed by the microcontroller through a filtering algorithm to calculate vital signs such as heart rate and respiratory rate, and finally the data is transmitted to the main controller through the photoelectric data output module.

[0023] Optionally, the infrared sensing module also includes a temperature compensation circuit, an infrared signal processing circuit and an infrared interface circuit; when the user defecates in the toilet, the infrared defecation detection probe is triggered, the probe senses the signal and then processes it through the temperature compensation circuit, transmits the sensing signal to the infrared signal processing circuit, and then the infrared interface circuit transmits the data to the main controller, and the main controller will record the number of bowel movements of the user.

[0024] Optionally, the blood oxygen monitoring module also includes a light source, a signal processing circuit, a microcontroller and a blood oxygen data output module. The blood oxygen monitoring module is arranged on a blood oxygen monitoring armrest, and the blood oxygen monitoring armrest is arranged on one side of the toilet cover body.

[0025] According to a second aspect of the present invention, there is provided a method for monitoring vital information parameters of an intelligent toilet seat, which is used in the above-mentioned intelligent toilet seat vital information parameter monitoring system, comprising the following steps:

[0026] When the user sits on the smart toilet seat, the piezoelectric sensor module in the toilet seat senses the use of the person, and the optical fiber sensor module and the infrared defecation detection probe are activated. The optical fiber sensor module is vibrated by the thigh to generate a cardiac impact signal, and the heart rate, respiratory rate, abnormal heart rhythm and electrocardiogram are obtained through the cardiac impact signal;

[0027] The infrared sensor module and the blood oxygen sensor module can be used to sense dynamic blood pressure, body movement and in / out of the barrel status, and an early warning will be issued when the user's vital signs are abnormal.

[0028] Optionally, when the user has abnormal vital signs, issuing an early warning includes:

[0029] When the user enters the equipment installation site, the infrared sensor module recognizes the human body posture and automatically identifies the standing, sitting or falling posture. When a fall occurs, the data is transmitted to the main controller. The main controller activates the alarm and transmits it to the data management system, and remotely alerts the community, relatives and friends or the emergency center.

[0030] Technical effects and advantages of the present invention:

[0031] The present invention provides a smart toilet seat vital information parameter monitoring system and method, which can monitor the user's defecation frequency, defecation duration and real-time vital information parameters during defecation through a new smart toilet seat monitoring system. In addition, infrared and microwave radar monitoring technologies are combined to evaluate and warn of abnormal fluctuations in vital information parameters (heart rate, electrocardiogram, blood oxygen) and instantaneous posture changes (falls) during defecation, thereby reducing health risks caused by untimely detection of acute stress events during defecation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1is a schematic diagram of the control circuit structure provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the intelligent toilet seat provided by an embodiment of the present invention;

[0034] Figure 3 is the original BCG signal spectrum provided by the embodiment of the present invention;

[0035] Figure 4 The original BCG signal restored respiratory rate provided by the embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of the seat BCG implementation principle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that approximately 235,000 people in the United States are sent to the emergency room each year due to accidents in the toilet, and nearly 14% need to be hospitalized. The incidence of defecation-induced cardiac arrest is 2.3% to 7.4%, and 4.6% of out-of-hospital cardiac arrest occurs in the toilet. When using the toilet, the pressure shock changes caused by breathing, heartbeat, body movement and other behaviors will cause the length or refractive index of the interference wave to change, thereby causing the phase change of the interference fringes. By analyzing the phase change, machine learning and deep learning algorithms, such as the advanced CNN (Convolutional Neural Network) IJK (Image Jittering and Kernels) detection algorithm, are used to improve the performance of target detection. Various parameters about vital signs can be obtained, such as heart rate, respiratory rate, abnormal heart rhythm, blood pressure changes, etc.

[0039] It is understandable that based on the defects in the background technology, the embodiment of the present invention proposes a smart toilet seat vital information parameter monitoring system, which is applied to smart toilets, toilet aids and other toilets, specifically Figure 1 and Figure 2 As shown, the system includes an optical fiber sensing module and a piezoelectric sensing module, and the optical fiber sensing module and the piezoelectric sensing module are located on the intelligent toilet seat.

[0040] Fiber optic sensor module, used for real-time monitoring of heart rate, respiratory rate, and abnormal heart rhythm;

[0041] The optical fiber sensing module includes a light source generator, a photoelectric detector, a photoelectric signal processing circuit, a photoelectric microcontroller, and a photoelectric data output module. When the user sits on the intelligent toilet seat when going to the toilet, the pressure generated by the fluctuation of the user's femoral artery will compress the optical fiber sensor under the latex pad. The light source generator and the photoelectric detector transmit and capture the changes of light in the optical fiber sensor. The arterial fluctuation compresses the light phase change generated by the optical fiber sensor, and then the photoelectric signal processing circuit converts the photoelectric signal into a pulse signal, and then the microcontroller performs filtering algorithm processing to calculate vital signs such as heart rate and respiratory rate. The data is then transmitted to the main controller through the photoelectric data output module.

[0042] Pressure changes caused by breathing, heartbeat, body movement and other behaviors will change the shape of the optical fiber, causing changes in optical signals such as light intensity and phase in the optical fiber. These changes are then separated and identified through algorithms to obtain various physiological data.

[0043] The present invention uses the third-generation all-optical Mach-Zehnder interferometer to realize ballistocardiogram (BCG) detection technology, places the sensing optical fiber in the toilet seat device, and detects the tiny changes in the optical fiber caused by the vibration of the femoral artery and the chest and abdominal breathing movement when using the toilet, so as to realize the real-time monitoring of vital signs when using the toilet.

[0044] Among them, the non-sensing acquisition of respiratory heart rate, abnormal heart rhythm and respiratory rate includes:

[0045] Extract the peak value of each heartbeat in a certain section of the heart rate signal, calculate the distance between these n peak values ​​(diff), take the median of these n-1 differences, and calculate the heart rate;

[0046] By combining heart rate with the phonocardiogram monitored by fiber optic acoustic fiber membrane, abnormal heart rhythm can be analyzed, fast Fourier calculation can be performed on a certain section of the respiratory signal, and the frequency point with the largest amplitude in the range of 0.1HZ to 0.5HZ in the frequency domain signal can be taken out to calculate the respiratory rate.

[0047] The specific operation is as follows: extract the peak value of each heartbeat in a certain section of heart rate signal, such as Figure 3As shown in peak1 to peak10: calculate the distance (difference diff) between these 10 peaks, i.e. peak2-peak1, peak3-peak2..., peak10-peak9; take out the median of these 9 differences, i.e. median(diff); calculate the heart rate, i.e. 60 / median(diff), in bpm / s. By combining the heart rate with the phonocardiogram monitored by the fiber optic acoustic fiber membrane, abnormal heart rhythm can be analyzed, and a certain section of the respiratory signal can be fast Fourier transformed (fft); take out the frequency point with the largest amplitude in the frequency domain signal of 0.1HZ~0.5HZ, i.e. w(Hz); calculate the respiratory rate, i.e. 60*w.

[0048] Piezoelectric sensor module, used to collect ballistocardiogram and phonocardiogram signals during defecation;

[0049] The piezoelectric sensor module includes a piezoelectric switch, a filter circuit, and a signal conditioning circuit. When the user sits on the smart toilet seat, the piezoelectric switch is pressed to activate the switch function, and an electrical signal is sent to the filter circuit for processing. The signal conditioning circuit then transmits the signal to the main control circuit board. The main control circuit board receives the signal and activates the optical fiber sensor module, blood oxygen monitoring module, and infrared transmission module for data processing. On this basis, machine learning, deep learning, and large model algorithms are used to effectively identify respiratory heart rate, abnormal heart rhythm, dynamic blood pressure, and body movement.

[0050] The piezoelectric sensor module senses when the device is started and detects whether someone is there or not. When a user sits on the smart toilet seat, the piezoelectric sensor in the toilet seat senses the use of the person, and the optical fiber sensor module will be activated. At the same time, the infrared defecation detection probe is activated. The optical fiber sensor module is vibrated by the thigh to generate a cardiac shock signal (BCG), and the heart rate, respiratory rate, abnormal heart rhythm and electrocardiogram are obtained through the cardiac shock signal.

[0051] In this embodiment, the intelligent toilet seat is provided with an optical fiber sensing module and a piezoelectric sensing module. When the user sits on the intelligent toilet seat when using the toilet, the pressure generated by the fluctuation of the user's femoral artery will compress the optical fiber sensor under the latex pad. The light source generator and the photoelectric detector transmit and capture the changes of light in the optical fiber sensor. The arterial fluctuation compresses the optical phase change generated by the optical fiber sensor. The photoelectric signal processing circuit converts the photoelectric signal into a pulse signal, which is then processed by the microcontroller through a filtering algorithm to calculate vital signs such as heart rate and respiratory rate. The data is then transmitted to the main controller through the photoelectric data output module, and finally the corresponding data is displayed on the display on the main body of the intelligent toilet seat.

[0052] It should be noted that the smart toilet seat can directly replace the seat in the existing home without the need for special additional systems. It can monitor the frequency and time of defecation of the elderly in an invisible way, and can monitor and record the heart rate, electrocardiogram, blood oxygen, etc. during defecation. If the elderly have abnormal vital signs, such as acute cardiovascular disease, respiratory and blood pressure surges caused by defecation, timely assessment and warning can be given.

[0053] The system also includes an infrared sensor module and a blood oxygen monitoring module, which are located on the main structure of the intelligent toilet seat.

[0054] Infrared sensor module, including defecation detection probe and fall monitoring probe, used for defecation frequency detection and iterative judgment alarm;

[0055] The infrared sensor module also includes an infrared defecation detection probe, an infrared fall detection probe, a temperature compensation circuit, an infrared signal processing circuit, and an infrared interface circuit. When a user defecates in the toilet, the infrared defecation detection probe is triggered, and the probe senses the signal and then processes it through the temperature compensation circuit, and transmits the sensing signal to the infrared signal processing circuit, and then the infrared interface circuit transmits the data to the main control controller, and the main control controller will record the number of defecation times of the user.

[0056] The infrared fall detection probe uses the infrared scattering principle for detection. If a user falls while using the toilet, a change in the coverage area of ​​the infrared detection optical path is detected as a fall of the user.

[0057] The sensorless acquisition of body movement and in / out of the barrel status includes:

[0058] The optical fiber electrical signal is used to obtain the separated characteristic wave. When the peak value of the characteristic wave exceeds the shock wave signal, it is determined to be body movement and recorded once. When the spectrum power of the cardiac ballistic signal (BCG) is compared with the calibration pressure value of 0, it is determined to be in / out of the bucket state, thereby recording the time of each defecation.

[0059] A blood oxygen monitoring module, including a photoelectric detector, for real-time monitoring of the user's heart cycle photoplethysmogram and blood oxygen fluctuation changes;

[0060] The blood oxygen monitoring module is arranged on the blood oxygen monitoring armrest, and the blood oxygen monitoring armrest is arranged on one side of the toilet seat body. The blood oxygen monitoring armrest includes a blood oxygen monitoring module, a blood oxygen monitoring finger sleeve and an armrest. The monitoring armrest has the function of protecting the user from falling, and the blood oxygen monitoring finger sleeve provided on the armrest can monitor the fluctuation of the user's blood oxygen in real time.

[0061] The blood oxygen monitoring module includes a light source, a photodetector, a signal processing circuit, a microcontroller, and a blood oxygen data output module, which are used for PPG and blood oxygen saturation monitoring.

[0062] like Figure 4As shown, the cardiac impact signal (BCG) will have a spike S1 that rises rapidly and then falls rapidly. It is generated by ventricular excitation and marks the beginning of ventricular contraction. The S1 peak is taken as the starting time point of blood conduction, the peak value S2 of the pulse impact signal is taken as the end point, and the time difference is obtained as the cardiac contraction blood conduction delay time. The valley point S2 after the cardiac impact signal (BCG) S1 is obtained as the starting point, and the valley point D2 of the pulse impact signal is taken as the end point. The time difference is obtained as the conduction delay time of cardiac diastole.

[0063] Among them, the non-sensing acquisition of dynamic blood pressure includes:

[0064] By establishing a mathematical model between the delay time and blood pressure, the delay time and the diastolic and systolic blood pressures measured by a mercury sphygmomanometer were subjected to regression analysis, and the blood pressure calculation formulas for systolic and diastolic blood pressures were obtained, which are expressed as follows:

[0065] P=a·T+b

[0066] Among them, P is the blood pressure value; T is the delay time; a and b are unknown coefficients, which are calibrated through a large number of experiments.

[0067] The system also includes a main control controller located on the main body of the smart toilet seat, and the main control controller is used to upload the data monitored by the smart toilet seat to the data management system and display it on the display screen.

[0068] The main control includes a main control circuit board, a display screen and a communication module. The communication module provides unlimited transmission function, transmits data with the management system through Bluetooth or WiFi, and uploads the data monitored by the smart toilet seat to the data management system. The display screen is used to display monitoring data; the power management module is used to power the monitoring equipment and the flushing system and other hardware. The power supply includes a power management module and a power cord. The power management module also includes a monitoring equipment power supply module and a flushing system power supply module. The monitoring equipment power supply module converts the external 220V AC power supply into DC power supply to power the main control, blood oxygen monitoring armrest, smart toilet seat, and infrared sensor; the flushing system power supply module supplies power to the hip flushing pump, etc.

[0069] The main control circuit board is respectively connected to the display screen, the communication module, the power management module, the optical fiber sensing module, the piezoelectric module, the blood oxygen monitoring module and the infrared monitoring module.

[0070] In actual use, Figure 5As shown, the user places his hand on the blood oxygen monitoring armrest and monitors the blood oxygen saturation status at the same time. At the same time, the user's blood pressure status can also be calculated using the heartbeat signal obtained by the fiber optic sensor and the PPG signal obtained by the blood oxygen monitoring module. The main controller will collect the vital sign parameters collected by the blood oxygen monitoring armrest and the fiber optic sensor, and also collect the sensing signals obtained by the infrared sensor. If the user has abnormal vital signs, such as acute cardiovascular time, respiratory time and blood pressure suddenly rise due to defecation, timely evaluation and warning can be carried out.

[0071] A specific application of this system is: intelligent toilet seat vital information parameter detection system. When the user enters the bathroom where the equipment is placed, the infrared or microwave radar fall monitoring probe in the infrared or microwave radar sensor will recognize the posture of the human body and automatically recognize three postures: standing, sitting, and falling. When a fall occurs, the data will be transmitted to the main control controller. The internal program setting of the controller can activate the alarm transmission to the data management system to remotely remind the community or relatives and friends. When the user sits on the intelligent toilet seat, the piezoelectric sensor in the toilet seat senses the use of the person, the optical fiber sensing module will be activated, and the infrared defecation detection probe will be activated. The optical fiber sensing module generates a cardiac shock signal (BCG) due to the vibration of the thigh, and the heart rate, respiratory rate, electrocardiogram, etc. are obtained through the cardiac shock signal (BCG) combined with the phonocardiogram (PCG).

[0072] To summarize, the embodiment of the present invention uses the intelligent toilet seat vital information parameter monitoring system to monitor the user's defecation frequency, defecation duration and real-time vital information parameters during defecation, and combines infrared or microwave radar monitoring technology to evaluate and warn of abnormal fluctuations in vital information parameters (heart rate, electrocardiogram, blood oxygen) and instantaneous posture changes (falls) during defecation, thereby reducing health risks caused by untimely detection of acute stress events during defecation.

[0073] In addition, an embodiment of the present invention proposes a method for monitoring vital information parameters of a smart toilet seat, which is applied to the above-mentioned system for monitoring vital information parameters of a smart toilet seat, and the method includes:

[0074] When the user sits on the smart toilet seat, the piezoelectric sensor module in the toilet seat senses the use of the person, and the optical fiber sensor module and the infrared defecation detection probe are activated. The optical fiber sensor module is vibrated by the thigh to generate a cardiac impact signal, and the heart rate, respiratory rate, abnormal heart rhythm and electrocardiogram are obtained through the cardiac impact signal;

[0075] The infrared sensor module and the blood oxygen sensor module can be used to sense dynamic blood pressure, body movement and in / out of the barrel status, and an early warning will be issued when the user's vital signs are abnormal.

[0076] Among them, when the user's vital signs are abnormal, the warning also includes posture recognition warning, specifically:

[0077] When the user enters the equipment installation site, the infrared sensor module recognizes the human body posture and automatically identifies three postures, including: standing, sitting, and falling. When a fall occurs, the data is transmitted to the main controller, which activates the alarm and transmits it to the data management system, and remotely alerts the community, relatives, friends or emergency center.

[0078] The infrared or microwave radar fall detection probe adopts infrared or microwave radar scattering detection. When the user falls while entering the toilet, when the infrared or microwave radar detection optical path and microwave coverage area change, it is determined that the user has fallen.

[0079] When the user defecates in the toilet, the infrared sensor module is triggered. The probe senses the signal, which is processed by the temperature compensation circuit and transmitted to the infrared or microwave radar signal processing circuit. The infrared or microwave radar interface circuit then transmits the data to the main controller, which records the user's bowel movement frequency and bowel movement volume information.

[0080] The technical effect of the embodiment of the present invention is that the embodiment of the present invention does not rely on contact electrodes (contact, high moisture-proof maintenance requirements, and strict waterproof conditions), and innovatively realizes the real-time monitoring of malignant arrhythmias such as atrial fibrillation, supraventricular tachycardia, and arrhythmia induced by vagal nerve reflex during defecation based on BCG, PCG, and PPG technologies, and realizes real-time monitoring and early warning of dynamic blood pressure and arrhythmia during defecation. At the same time, the present invention combines the third-generation fiber optic interference technology with the toilet seat, which is convenient for monitoring the dynamic vital signs of the elderly during defecation, thereby improving the early warning of the risk of adverse cardiovascular and cerebrovascular events.

[0081] Before the occurrence of defecation-induced cardiovascular events, there will be hemodynamic instability, resulting in short-term blood pressure fluctuations. However, the current non-invasive blood pressure detection technologies include Koch sound method and oscillometric method. The blood pressure monitoring method using non-invasive cuff oscillation technology completely blocks the intravascular arterial blood flow after the cuff is inflated to a certain pressure value, and uses the vibration of the brachial artery wall to generate a gas oscillation wave in the cuff, and the corresponding systolic and diastolic pressures are calculated. The inflation and deflation time is more than 30 seconds, and effective warning cannot be achieved. The present invention does not rely on the cuff, but relies on BCG combined with PPG technology to achieve millisecond-level blood pressure fluctuation monitoring and real-time warning of malignant cardiovascular events.

[0082] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0083] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent toilet seat vital information parameter monitoring system, applied to toilets, characterized in that: The system comprises: Piezoelectric sensor module, used to collect ballistocardiogram and phonocardiogram signals during defecation; Fiber optic sensing module for real-time monitoring of heart rate and respiratory rate; The piezoelectric sensing module is used in combination with the optical fiber sensing module to senselessly obtain the respiratory heart rate, abnormal heart rhythm and respiratory rate, wherein the senselessly obtaining the respiratory heart rate, abnormal heart rhythm and respiratory rate includes: Extract the peak value of each heartbeat in a certain section of the heart rate signal, calculate the difference between these n peak values, take the median of these n-1 differences, and calculate the heart rate; By combining heart rate with the phonocardiogram monitored by the fiber optic acoustic fiber membrane, abnormal heart rhythm is analyzed, and a certain section of the respiratory signal is subjected to fast Fourier calculation, and the frequency point with the largest amplitude in the range of 0.1HZ to 0.5HZ in the frequency domain signal is taken out to calculate the respiratory rate; The system further comprises: Infrared sensor module, including defecation detection probe and fall monitoring probe, used for defecation frequency detection and iterative judgment alarm; A blood oxygen monitoring module, including a photodetector, a photoplethysmogram of the user's heart cycle, and real-time monitoring of blood oxygen saturation; The infrared sensor module is used in conjunction with the blood oxygen monitoring module to obtain dynamic blood pressure without sensing, wherein the method of obtaining dynamic blood pressure without sensing includes: A mathematical model between the delay time and blood pressure was established, and regression analysis was performed on the delay time and the diastolic and systolic blood pressures measured by a mercury sphygmomanometer to obtain the blood pressure calculation functions of the systolic and diastolic blood pressures, and the blood pressure values ​​were calculated.

2. The intelligent toilet seat vital information parameter monitoring system according to claim 1, characterized in that: The system also includes a main control controller, which is used to upload the data monitored by the sensor module to the data management system and display it on a display screen.

3. The intelligent toilet seat vital information parameter monitoring system according to claim 2, characterized in that: The main control controller includes a main control circuit board, a display screen and a communication module; the main control circuit board is respectively connected to the display screen, the communication module, the optical fiber sensor module, the piezoelectric sensor module, the blood oxygen monitoring module and the infrared sensor module; the communication module wirelessly transmits data with the management system, and uploads the data monitored by the smart toilet seat to the data management system; the display screen is used to display the monitoring data.

4. The intelligent toilet seat vital information parameter monitoring system according to claim 1, characterized in that: The piezoelectric sensing module includes a piezoelectric switch, a filtering circuit and a signal conditioning circuit. When the user sits on the smart toilet seat when using the toilet, the piezoelectric switch is pressurized to activate the switch function and send an electrical signal to the filtering circuit for processing. The signal conditioning circuit then transmits the signal to the main control circuit board. The main control circuit board receives the signal to activate the optical fiber sensor module, the blood oxygen monitoring module and the infrared transmission module for data processing.

5. The intelligent toilet seat vital information parameter monitoring system according to claim 4, characterized in that: The piezoelectric sensing module collects cardiac shock signals, phonocardiogram signals and photoplethysmogram signals in real time during defecation. The main control circuit board receives the signal to start the optical fiber sensing module, blood oxygen monitoring module and infrared sensing module to process the data, and on this basis, applies machine learning, deep learning and large model algorithms to effectively identify respiratory heart rate, abnormal heart rhythm, dynamic blood pressure and body movement.

6. The intelligent toilet seat vital information parameter monitoring system according to claim 1, characterized in that: The fiber optic sensing module includes a light source generator, a photoelectric detector, a photoelectric signal processing circuit, a photoelectric microcontroller and a photoelectric data output module. When the user goes to the toilet, he sits on the smart toilet seat. The pressure generated by the fluctuation of the user's femoral artery compresses the fiber optic sensor under the latex pad. The light source generator and the photoelectric detector transmit and capture the changes of light in the fiber optic sensor. The arterial fluctuation compresses the light phase change generated by the fiber optic sensor. The photoelectric signal processing circuit converts the photoelectric signal into a pulse signal, which is then processed by the microcontroller through a filtering algorithm to calculate vital signs such as heart rate and respiratory rate. Finally, the data is transmitted to the main controller through the photoelectric data output module.

7. The intelligent toilet seat vital information parameter monitoring system according to claim 1, characterized in that: The infrared sensing module also includes a temperature compensation circuit, an infrared signal processing circuit and an infrared interface circuit; when the user defecates in the toilet, the infrared defecation detection probe is triggered, the probe senses the signal and then processes it through the temperature compensation circuit, transmits the sensing signal to the infrared signal processing circuit, and then the infrared interface circuit transmits the data to the main control controller, and the main control controller will record the number of bowel movements of the user.

8. The intelligent toilet seat vital information parameter monitoring system according to claim 1, characterized in that: The blood oxygen monitoring module also includes a light source, a signal processing circuit, a microcontroller and a blood oxygen data output module. The blood oxygen monitoring module is arranged on a blood oxygen monitoring armrest, and the blood oxygen monitoring armrest is arranged on one side of the toilet cover body.

9. A method for monitoring vital information parameters of an intelligent toilet seat, used in a system for monitoring vital information parameters of an intelligent toilet seat as claimed in any one of claims 1 to 8, characterized in that: The monitoring method comprises the following steps: When the user sits on the smart toilet seat, the piezoelectric sensor module in the toilet seat senses the use of the person, and the optical fiber sensor module and the infrared defecation detection probe are activated. The optical fiber sensor module is vibrated by the thigh to generate a cardiac impact signal, and the heart rate, respiratory rate, abnormal heart rhythm and electrocardiogram are obtained through the cardiac impact signal; The infrared sensor module and the blood oxygen sensor module can be used to sense dynamic blood pressure, body movement and in / out of the barrel status, and an early warning will be issued when the user's vital signs are abnormal.

10. A method for monitoring vital information parameters of an intelligent toilet seat according to claim 9, characterized in that: When the user has abnormal vital signs, issuing an early warning includes: When the user enters the equipment installation site, the infrared sensor module recognizes the human body posture and automatically identifies the standing, sitting or falling posture. When a fall occurs, the data is transmitted to the main controller. The main controller activates the alarm and transmits it to the data management system, and remotely alerts the community, relatives and friends or the emergency center.

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