WO2019119670A1 - Blood pressure monitoring device based on intelligent device and wearable bracelet - Google Patents

Abstract

A blood pressure monitoring device based on an intelligent device and a wearable bracelet, comprising: an intelligent device and a wearable bracelet, wherein the wearable bracelet is internally provided with a first pulse sensor, a microprocessor and a communication module; the microprocessor is connected to the first pulse sensor and the communication module respectively, and the communication module is in communication connection with a data communication interface of the intelligent device; said intelligent device is internally provided with a second pulse sensor to monitor the pulse at the fingertip location, and the wearable bracelet is worn at the wrist location so as to monitor the pulse at said location. By means of the described method, the blood pressure monitoring device based on the intelligent device and the wearable bracelet may monitor blood pressure at any time or location at an intelligent device terminal such as a cell phone or tablet computer in combination with the wearable bracelet, and the present device and bracelet have the characteristics of having a small size, portability, a simple structure, a good degree of comfort, and being convenient for use and the like.

Description

Blood pressure monitoring device based on smart device and wearing bracelet Technical field

The invention relates to the technical field of human blood pressure monitoring, in particular to a blood pressure monitoring device based on a smart device and a wearable wristband.

Background technique

The human body's pulse and blood pressure signals contain abundant physiological information and are the basis for clinical diagnosis. At the same time of rapid development of science and technology, social competition is becoming more intense, people's life rhythm is faster, and work and life pressures are intensifying. Therefore, family-oriented, community-based, and civilian human blood pressure monitoring devices have broad market prospects.

In addition, traditional blood pressure monitoring is an arm-type electronic sphygmomanometer that combines a vibration sensor, a microsonic sensor or a stethoscope with an inflatable air sleeve that is connected to a mercury pressure gauge or a mercury-free pressure gauge. Some semi-automatic or fully automatic blood pressure measuring instruments, the principle is exactly the same as the traditional sphygmomanometer, except that the micro-sound sensor is used instead of the stethoscope, the pressure sensor is used instead of the mercury pressure gauge, and the sleeve is still needed. The semi-automatic sphygmomanometer also needs the artificial sleeve. Inflating and deflation, the operation is cumbersome, the comfort is poor, and improvement is needed.

Summary of the invention

The technical problem to be solved by the present invention is to provide a blood pressure monitoring device based on a smart device and a wearable wristband, which solves the problems of large volume, poor portability, cumbersome operation and poor comfort of the traditional arm type electronic blood pressure monitor, and realizes portable, Real-time blood pressure monitoring.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a blood pressure monitoring device based on a smart device and a wearable wristband, comprising: a smart device and a wearable wristband, and the wearable wristband is provided with a first pulse sensor, a microprocessor and a communication module, wherein the microprocessor is respectively connected to the first pulse sensor and the communication module, and the communication module is in communication connection with the data communication interface of the smart device, and the smart device is configured There is a second pulse sensor to monitor the pulse at the fingertip position, which is worn at the wrist position of the human body to monitor the pulse at that location.

In a preferred embodiment of the invention, the smart device includes, but is not limited to, a smartphone and a tablet.

In a preferred embodiment of the invention, the smart device includes a processor coupled to the output of the data communication interface.

In a preferred embodiment of the invention, the first and second pulse sensors include, but are not limited to, opto-electronic or acceleration-based or gyro-based pulse sensors.

In a preferred embodiment of the invention, the smart device further includes a display screen coupled to the processor.

In a preferred embodiment of the present invention, the communication module is a wireless communication module or a wired communication module.

In a preferred embodiment of the present invention, the wearable wristband further includes a power supply module, and the power supply module is respectively connected to the first pulse sensor, the microprocessor, and the communication module for power supply, and the power supply module adopts but does not It is limited to one of a high-capacity, high-density one-time button battery and a rechargeable lithium battery that can be recharged.

In a preferred embodiment of the invention, the photoelectrically based first pulse sensor and second pulse sensor operating wavelengths include, but are not limited to, visible light and infrared.

In a preferred embodiment of the present invention, the smart device calculates a pulse time delay according to the pulse information collected by the first pulse sensor and the second pulse sensor, and calculates the blood pressure according to the pulse time delay.

The smart device measures the fingertip pulse method by using a proximity sensor (infrared light transceiver), a light sensor (visible light detector) or a camera built in the smart device, and receiving signals of infrared light or visible light through the finger end, wherein the skin, bones, The reflection or absorption of light by meat, fat, etc. is a fixed value, while the capillaries and arteries and veins become larger and smaller with the pulse volume under the action of the heart. When the heart contracts, the peripheral blood volume is the most, and the light absorption is the largest. Also, the detected light intensity is the smallest, and when the heart is diastolic, on the contrary, the detected light intensity is the largest, so the light receiving tube in the proximity sensor or the light sensor can receive the strong and weak change in synchronization with the fingertip pulse. Light wave, through the data acquisition, processing, extract the fingertip pulse signal, combined with the wrist pulse signal sent by the wearable bracelet, calculate the pulse conduction time, and then calculate the blood pressure information.

The invention has the beneficial effects that the blood pressure monitoring device based on the smart device and the wearable wristband is pointed out by the invention, and the blood pressure monitoring can be realized anytime and anywhere in the smart device terminal, such as a mobile phone or a tablet computer, in combination with the wearable wristband. The utility model has the advantages of small size, convenient carrying, simple structure, good comfort and convenient use, and has a broad market prospect.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained according to these drawings without any creative work, wherein:

1 is a schematic diagram of a physical object of a blood pressure monitoring device based on a smart device and a wearable wristband according to a preferred embodiment of the present invention;

2 is a structural conceptual view of a preferred embodiment of a blood pressure monitoring device based on a smart device and a wearable wristband according to the present invention;

Figure 3 exemplarily shows a proximity sensor chip in a smart device;

Figure 4 exemplarily shows a light sensor chip in a smart device.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1 to FIG. 4, an embodiment of the present invention includes:

A blood pressure monitoring device based on a smart device and a wearable wristband, comprising: a smart device and a wearable wristband, the smart device including but not limited to a smart phone and a tablet, the use of the smart phone is relatively common, and the wearable hand The ring fits for real-time monitoring.

The wearable wristband is provided with a first pulse sensor, a microprocessor and a communication module, and the microprocessor is respectively connected with the first pulse sensor and the communication module, and the communication module performs a data communication interface with the smart device. a communication connection, wherein the smart device is provided with a second pulse sensor for monitoring the pulse of the fingertip position, the second pulse sensor is a proximity sensor, a light sensor or a camera, and the second pulse sensor is linear with the processor of the smart device Connected, the acquired pulse wave signal is directly read by the processor, and the wearable wristband is worn on the wrist position of the human body to monitor the pulse at the position, and the blood pressure information is calculated:

According to the Moens-Kortweg wave velocity equation:

Where c is the pulse wave velocity, E is the Young's modulus of elasticity of the blood vessel, h is the thickness of the vessel wall, D is the diameter of the blood vessel, and ρ is the density of the blood vessel;

Hughes et al. demonstrated the relationship between transvascular wall pressure and vascular elastic modulus:

Where E ₀ is the elastic modulus in the initial state, γ represents a reference coefficient ranging from 0.016 to 0.018 mmHg, and P represents the blood pressure across the wall pressure. Generally, the transmural pressure P = P _{i -} P _o , P _i and P _o represent the intra-arterial pressure and the external wall pressure of the artery, respectively. Since the wall of the arterial wall is connected to the atmospheric pressure through other physiological tissues outside the artery, P _o can replace the atmospheric pressure, and the blood pressure we usually refer to refers to the difference between the intra-arterial pressure and the atmospheric pressure, so P can represent blood pressure.

On the other hand, pulse wave transit time refers to the time it takes for the pulse wave to travel from one point in the arterial tree to another point on the telecentric end. The pulse wave transit time, propagation speed, and transmission distance can be expressed by:

Where L is the transmission distance of the pulse wave and PWTT is the pulse wave transit time.

Bring the formula 2 and the formula 3 into the formula 1, and the blood pressure P can be obtained by finishing:

Using the wearable wristband to monitor the pulse at the wrist, when the heart of the human body beats, more blood will flow through the wrist. The emitting end of the photoelectric first pulse sensor is equipped with a green LED, and the absorption of green light will be larger. In the heartbeat gap, the amount of green light absorption will decrease. Therefore, the light intensity received by the optical receiver of the photoelectric first pulse sensor changes pulsatingly with the absorbance of the blood, and data is collected, processed, extracted, and transmitted by the wireless communication module to the smart device by the microprocessor. Communication interface input.

At the same time, using the built-in proximity sensor (infrared light transceiver), light sensor (visible light detector) or camera of the smart device to receive visible or infrared light through the fingertip, the skin's skin, bones, muscles and fat reflect or absorb light. It is a fixed value, and the capillaries and arteries and veins become larger and smaller as the pulse volume continues to increase, so the reflection of light is a fluctuation value. The reflected fluctuation value can be received by the photosensor in the proximity sensor or the light sensor, and the fingertip pulse signal is extracted by data acquisition and processing, and the pulse transit time (PTT) is calculated to obtain blood pressure information.

The smart devices include, but are not limited to, smart phones and tablets. With the popularity of smart phones and the development of various sensors in smart phones, smart phones have become an indispensable part of people's lives. At the same time, wearable wristbands are small and compact. It is also popular among people because of its low price and convenient wearing. The smart device includes a processor coupled to the data communication interface output, the proximity sensor or light sensor is linearly coupled to the processor, the processor performs signal reception, processing, and calculation, and displays the monitored blood pressure on the display screen. .

The wearable wristband includes a power supply module, which is very convenient to use. The power supply module is respectively connected to the first pulse sensor, the microprocessor and the communication module for power supply, and the power supply module is limited to high capacity and high density. One of the one-time button battery and lithium battery that can be recharged and used, it is light in weight and light in wear.

The communication module is a wireless communication module or a wired communication module, and generally adopts a wireless communication module, which is convenient for wireless data communication between the smart device and the wearable wristband, and is flexible in use.

The proximity sensor is a transceiver in the infrared band, and the common proximity sensor TMD2671 series chip built in the smart device is shown in FIG. 3, and the series provides a complete proximity detection system and digital interface logic in a single 8-pin package. . The proximity detector includes a digital proximity sensor with an integrated LED driver and an infrared LED. The proximity function is calibrated to 100mm (without cover glass), so no terminal equipment or factory calibration subassemblies are required. The internal state machine provides the ability to place the device in a low power mode, providing very low average power consumption. The addition of micro-optical lenses within the module provides high efficiency of infrared energy transmission and reception, reducing the overall power consumption of the detection function. The proximity feature is specifically targeted at near-field proximity applications, such as proximity sensors in smartphones. Communication with external devices is achieved through a simple 2-wire I ² C interface with data rates up to 400 kHz. An interrupt output pin is provided for connection to the host processor. There is also a digital filter that compares the near ADC results with the programmed values to generate an interrupt only when the event is approached. The TMD2671 series is available in a very small 8-pin optical package. The required PCB area is only 9.36mm ² and the package height is only 1.35mm, making the TMD2671 device suitable for very thin mechanical applications such as smartphones.

The light sensor is a receiver in a visible light band, and the common light sensor TSL2571 series chip built in the smart device is shown in FIG. 4 , and the series includes on-chip photodiodes, integrating amplifiers, ADCs, accumulators, clocks, buffers, Comparator, state machine and I ² C interface. The chip combines a photodiode (CH0) that is sensitive to visible and infrared light and a photodiode (CH1) that is sensitive to infrared light. The two integrated ADCs simultaneously convert the amplified photodiode current to a digital value, providing up to 16-bit resolution. After the conversion cycle is completed, the conversion result is transferred to the data register. This digital output can be read by the microprocessor.

In summary, the present invention discloses a blood pressure monitoring device based on a smart device and a wearable wristband, which is small in size, convenient to carry, simple in structure, comfortable in use, convenient to use, can monitor blood pressure at any time, and can be based on almost human hands. A must-have smartphone that greatly reduces the cost of use.

The above is only the embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification of the present invention, or directly or indirectly applied to other related technical fields, The same is included in the scope of patent protection of the present invention.

Claims (9)

1. A blood pressure monitoring device based on a smart device and a wearable wristband for portable monitoring of blood pressure of a human body, comprising: a smart device and a wearable wristband, wherein the wearable wristband is provided with a first pulse sensor a microprocessor and a communication module, wherein the microprocessor is respectively connected to the first pulse sensor and the communication module, wherein the communication module is in communication connection with the data communication interface of the smart device, and the second pulse is set in the smart device A sensor is used to monitor the pulse of the fingertip position, which is worn at the wrist position of the human body to monitor the pulse at that location.
2. The smart device and wearable wristband-based blood pressure monitoring device according to claim 1, wherein the smart device comprises, but is not limited to, a smartphone and a tablet.
3. A smart device and wearable wristband based blood pressure monitoring device according to claim 1 wherein said smart device includes a processor coupled to the data communication interface output.
4. The smart device and wearable wristband-based blood pressure monitoring device according to claim 1, wherein the first pulse sensor and the second pulse sensor comprise, but are not limited to, photoelectric based or acceleration based or gyro based pulse. sensor.
5. The smart device and wearable wristband-based blood pressure monitoring device according to claim 1, wherein the smart device further comprises a display screen connected to the processor.
6. The smart device and the wearable wristband-based blood pressure monitoring device according to claim 1, wherein the communication module is a wireless communication module or a wired communication module.
7. The smart device and the wearable wristband-based blood pressure monitoring device according to claim 1, wherein the wearable wristband further comprises a power supply module, the power supply module and the first pulse sensor and the microprocessor respectively The power supply module is connected to the communication module, and is not limited to one of a high-capacity, high-density one-time button battery and a rechargeable lithium battery that can be recharged.
8. A smart device and wearable wristband based blood pressure monitoring device according to claim 4, wherein the photoelectric based first pulse sensor and second pulse sensor operating wavelengths include, but are not limited to, visible light and infrared.
9. The smart device and wearable wristband-based blood pressure monitoring device according to claim 1, wherein the smart device calculates a pulse time delay according to pulse information collected by the first pulse sensor and the second pulse sensor, according to The pulse time is delayed and the blood pressure is calculated.

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