TWM660036U - Wrist Blood Pressure Measurement Device - Google Patents

Abstract

A wrist blood pressure measuring device is worn on a wrist of a user, and includes a wearable pressure-applying assembly, a posture sensing unit, a sound sensing unit, a processing unit, an inflation/deflation unit, a pressure sensing unit, and an output unit. The posture sensing unit is configured to detect whether the wrist of the user is at a predetermined tilt angle, the sound sensing unit is configured to detect a heart sound of the user, the processing unit is coupled to the posture sensing unit and the sound sensing unit and outputs a signal related to the tilt angle and the heart sound, and the inflation/deflation unit is configured to fill the airbag unit with a filling gas based on the signal so that the wearable pressure-applying assembly applies a pressure to the wrist.

Description

Wrist Blood Pressure Measurement Device

The present invention relates to a blood pressure measuring device, and in particular to a wrist-type blood pressure measuring device that can measure blood pressure at a correct position.

With the rise of health awareness, people have gradually become accustomed to monitoring their health-related values in daily life to detect potential health problems early. They can also let doctors refer to their usual body data during consultations to facilitate doctors' diagnosis.

Blood pressure monitors are one of the common household medical devices in people's daily life. Traditional arm-type blood pressure monitors are relatively large in size. Although the measured values are accurate, they are not convenient to carry and install in each family. In order to facilitate users to monitor their own blood pressure regularly, wrist blood pressure monitors have been developed. They can be worn directly on the user's wrist for measurement. They have the advantages of small size, easy storage and carrying.

Generally speaking, the cuff in a traditional arm-type blood pressure monitor is worn on the user's arm. The user sits and leans his elbow on the table to measure, which can ensure the height, angle and distance of the arm from the heart. However, the wrist-type blood pressure monitor is worn directly on the user's wrist, and the fixedness of the posture is not as good as that of the arm-type blood pressure monitor, which is prone to the problem of inaccurate blood pressure measurement results due to incorrect measurement posture. Therefore, it is known that US Patent No. US9895084B2 discloses a wrist-type blood pressure monitor that can measure blood pressure after confirming the tilt angle and height of the user's wrist. However, the aforementioned method cannot determine the distance of the measurement position relative to the heart, and there is still a problem of inaccurate measurement data.

The main purpose of this new device is to solve the problem that the conventional wrist blood pressure monitor cannot accurately ensure that the user's wrist is in the correct position to measure blood pressure, resulting in inaccurate measurement data.

To solve the above problems, the present invention provides a wrist blood pressure measuring device, which is worn on a wrist of a user. The wrist blood pressure measuring device includes a wearable pressure-applying assembly, a posture sensing unit, a sound sensing unit, a processing unit, an inflation/deflation unit, a pressure sensing unit, and an output unit. The wearable pressure-applying assembly is worn on the wrist and includes an airbag unit and a wearable unit that fixes the airbag unit to the wrist of the user. The posture sensing unit is configured to detect whether the wrist of the user is at a pre-specified tilt angle. The sound sensing unit is configured to detect a heart sound of the user. The processing unit is coupled to the posture sensing unit and the sound sensing unit, and the processing unit outputs a signal related to the tilt angle and the heart sound. The inflation and deflation unit is connected to the airbag unit, and the inflation and deflation unit is configured to fill the airbag unit with a filling gas based on the signal so that the wearable pressure-applying component applies a pressure to the wrist. The pressure sensing unit is coupled to the airbag unit and is configured to transmit the detected pressure to the processing unit, and the processing unit generates a blood pressure data according to the pressure. The output unit is coupled to the processing unit and is configured to output a measurement result related to the blood pressure data.

1: Wrist blood pressure measuring device

10: Wearable pressure-applying component

11: Airbag unit

13: Wearable unit

20: Control components

21: Processing unit

211: Big Data Database

211a: Heart sound data

22: Posture sensing unit

23: Sound sensor unit

231: Radio

232:Amplifier

233:Filter

234:Signal converter

24: Inflation and deflation unit

25: Output unit

26: Operation unit

27: Pressure sensing unit

P: User

P1: Wrist

θ: Tilt angle

S: Heart sound

S1: First heart sound

S2: Second heart sound

V:Voiceprint

V1: First sound pattern

V2: Second sound pattern

H: Heart

A: Amplitude

F: Frequency

R: Regularity

A1, A2, A3, A4, F1, F2, F3, F4, R1, R2, R3, R4: characteristic data

a1, a2: Amplitude characteristics

f1, f2: frequency characteristics

r1, r2: Regularity characteristics

Figure 1 is a schematic diagram of an embodiment of the present invention.

Figure 2 is a schematic diagram of the method of an embodiment of the present invention.

Figure 3A is a schematic diagram of the usage of an embodiment of the present invention.

Figure 3B is a schematic diagram of the usage of an embodiment of the present invention.

Figure 3C is a schematic diagram of the usage of an embodiment of the present invention.

The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. Unless the context indicates otherwise, the singular forms "a", "an" and "the" used herein may also include plural forms.

Directional terms used herein, such as up, down, left, right, front, back and their derivatives or synonyms, refer to the orientation of the elements in the accompanying drawings and are not intended to limit the present invention unless the context clearly states otherwise.

Referring to FIG. 1 , FIG. 3A , FIG. 3B , and FIG. 3C , the present invention discloses a wrist blood pressure measuring device 1, which is worn on a wrist P1 of a user P. The wrist blood pressure measuring device 1 includes a wearable pressure-applying component 10 and a control component 20. The wearable pressure-applying component 10 is coupled to the control component 20 and the control component 20 is fixed to the wearable pressure-applying component 10, so that the whole device can be conveniently carried. In this example, the wearable pressure-applying component 10 is an inflatable wristband, and the control component 20 is a device host, which is used to control the inflation and deflation of the wearable pressure-applying component 10, and can display the physiological values measured by the user P, such as systolic pressure, diastolic pressure, pulse, heart rate, etc.

The wearable pressure-applying assembly 10 includes an airbag unit 11 and a wearing unit 13. The wearing unit 13 is disposed on the airbag unit 11 and is worn on the wrist P1 of the user P to fix the wearable pressure-applying assembly 10. In one example, the wearing unit 13 allows the wearable pressure-applying assembly 10 to be repeatedly removed and worn, such as Velcro, buckles, etc.

The control assembly 20 includes a processing unit 21, a posture sensing unit 22, a sound sensing unit 23, an inflation and deflation unit 24, an output unit 25, an operation unit 26 and a pressure sensing unit 27. The processing unit 21 is coupled to the posture sensing unit 22, the sound sensing unit 23, the inflation/deflation unit 24, the output unit 25, the operation unit 26 and the pressure sensing unit 27, and is used to receive and send signals or instructions. The pressure sensing unit 27 is coupled to the airbag unit 11 and is used to detect the pressure in the airbag unit 11. When the airbag unit 11 is in an inflated state, it squeezes the blood vessels in the wrist P1 of the user P. The pressure sensing unit 27 extracts a pressure according to the pulse in the blood vessels of the wrist P1.

The posture sensing unit 22 is used to detect the wrist posture of the user P. Specifically, the posture sensing unit 22 is used to detect a tilt angle θ of the wrist P1 of the user P. The tilt angle θ is within a predetermined specification. The tilt angle θ is defined as a clockwise angle being positive and a counterclockwise angle being negative relative to the horizontal plane. In one example, the posture sensing unit 22 is an acceleration sensor and is configured to detect whether the tilt angle θ of the wrist P1 of the user P is between 24° and 26°.

The sound sensing unit 23 is used to detect a heart sound S of the user P. The processing unit outputs a signal related to the tilt angle θ and the heart sound S to the inflation/deflation unit 24. The inflation/deflation unit 24 is connected to the airbag unit 11 and provides a filling gas to the airbag unit 11 based on the signal. The filling gas is air. The inflation/deflation unit 24 can also discharge the filling gas in the airbag unit 11. The output unit 25 is used to display the measurement results and/or issue a prompt sound. The operation unit 26 is used to control the processing unit 21. In one example, the sound sensing unit 23 is a microphone, the inflation/deflation unit 24 is a pump, the output unit 25 is a display screen, a speaker, or a combination of the display screen and the speaker, and the operation unit 26 is an operation button and a power switch. In other examples, the output unit 25 and the operation unit 26 can be integrated into a touch screen for operation and display of measurement results.

Referring to 'Figure 1' and 'Figure 2', the processing unit 21 has a large database 211, the large database 211 is coupled to the sound sensing unit 23, the large database 211 is associated with a plurality of heart sound data 211a, the heart sound data 211a includes an amplitude A, a frequency F, a regularity R or a combination thereof.

The sound sensing unit 23 includes a microphone 231, an amplifier 232, a filter 233 and a signal converter 234. The amplifier 232 is coupled to the microphone 231, the filter 233 is coupled to the amplifier 232, the signal converter 234 is coupled to the filter 233, and the signal converter 234 is connected to the big data database 211. The heart sound S of the user P is sequentially transmitted from the microphone 231 through the amplifier 232, the filter 233 and the signal converter 234, and is compared with the big data database 211.

The volume (amplitude) of the heart sound S is increased by the amplifier 232, and the sound of a specific frequency is removed by the filter 233. The heart sound S is converted from analog to digital by the signal converter 234, and the continuous signal in analog form is converted into a discrete signal in digital form to obtain a sound pattern V of the heart sound S of the user P. The sound pattern V is consistent with the heart sound in the big data database 211. The data 211a is subjected to a heart sound matching algorithm to determine whether the heart sound S meets a standard. The standard is based on the amplitude A, the frequency F, and the regularity R of the heart sound data 211a to determine the similarity or consistency of the sound pattern V of the heart sound S of the user P. In one example, the frequency F of the heart sound data 211a is between 20 Hz and 200 Hz.

Specifically, the heart sound S of the user P includes a first heart sound S1 and a second heart sound S2. The first heart sound S1 and the second heart sound S2 have a first sound pattern V1 and a second sound pattern V2, respectively. The first sound pattern V1 has an amplitude feature a1, a frequency feature f1, and a regularity feature r1. The second sound pattern V2 has an amplitude feature a2, a frequency feature f2, and a regularity feature r2.

The heart sound matching algorithm compares the amplitude feature a1, the frequency feature f1, the regularity feature r1 of the first soundprint V1 and the amplitude feature a2, the frequency feature f2, the regularity feature r2 of the second soundprint V2 with the multiple feature data A1, A2, A3, A4, F1, F2, F3, F4, R1, R2, R3, R4 of the big data database 211 to determine whether they meet the standard and obtain a result. If all the standards meet, the result is "meet", indicating that the heart sound S is detected. If any of the standards does not meet, the result is "not meet", indicating that the heart sound S is not detected. In one example, when the frequency characteristic f1 is 40 Hz to 60 Hz and the frequency characteristic f2 is 40 Hz to 100 Hz, the standard of the characteristic data F1, F2, F3, and F4 is met.

Referring to FIG. 3A to FIG. 3C , when the user P wants to measure blood pressure, the wearable unit 13 of the wearable pressure-applying assembly 10 is worn on the wrist P1 of the user P. The position of the wrist P1 changes with the movements of the user P, so that the wrist-type blood pressure measuring device 1 cannot accurately measure blood pressure. When the tilt angle θ of the posture sensing unit 22 does not meet the processing unit 21, the position of the wrist P1 changes with the movements of the user P. When a certain angle threshold is set, or the heart sound S detected by the sound sensing unit 23 does not meet the characteristic data A1, A2, A3, A4, F1, F2, F3, F4, R1, R2, R3, R4 set by the processing unit 21 (i.e., any of the tilt angle θ and the heart sound S does not meet the preset conditions), the processing unit 21 controls the inflation/deflation unit 24 not to inflate the airbag unit 11. In one embodiment, the angle threshold is between 24° and 26°.

For example, when the wrist P1 of the user P is located at the position shown in 'Figure 3A', the tilt angle θ does not meet the angle threshold set by the processing unit 21, and the sound sensing unit 23 cannot detect the heart sound S, and the inflation/deflation unit 24 does not inflate the airbag unit 11. When the wrist P1 of the user P is located at the position shown in 'Figure 3B', even if the tilt angle θ of the wrist P1 meets the angle threshold set by the processing unit 21 (the tilt angle θ is between 24° and 26°), the wrist P1 is far away from the heart H of the user P, so that the sound sensing unit 23 cannot detect the heart sound S, and the inflation/deflation unit 24 does not inflate the airbag unit 11.

When the wrist P1 of the user P is raised to a position parallel to the heart H and close to the heart H (as shown in 'Figure 3C'), the tilt angle θ is within the range of the angle threshold, and the heart sound S meets the characteristic data A1, A2, A3, A4, F1, F2, F3, F4, R1, R2, R3, R4 (i.e., the tilt angle θ and the heart sound S meet the preset conditions), the processing unit 21 controls the inflation and deflation unit 24 to inflate the airbag unit 11 to measure blood pressure.

Specifically, when the tilt angle θ detected by the posture sensing unit 22 is in the range of 24° to 26° and the sound sensing unit 23 detects the heart sound, the wrist-type blood pressure measuring device 1 performs the following steps:

Step S1: The inflation/deflation unit 24 fills the airbag unit 11 of the wearable pressure-applying component 10 with the filling gas so that the wearable pressure-applying component 10 worn on the wrist P1 applies a pressure to the wrist P1.

Step S2: The pressure sensing unit 27 transmits the detected pressure to the processing unit 21, and the processing unit 21 generates blood pressure data according to the pressure.

Step S3: The output unit 25 outputs a measurement result, which is related to the blood pressure data.

On the other hand, when the posture sensing unit 22 detects that the tilt angle θ is not within the range of 24° to 26° or the sound sensing unit 23 does not detect the heart sound S (either condition is met), the wrist blood pressure measurement device 1 is in an unactivated state, that is, the processing unit 21 controls the inflation and deflation unit 24 not to inflate the airbag unit 11, and the output unit 25 does not display the measurement result.

In summary, the wrist-type blood pressure measuring device disclosed in the present invention includes the posture sensing unit and the sound sensing unit at the same time. When the tilt angle detected by the posture sensing unit and the heart sound detected by the sound sensing unit meet the preset conditions, the processing unit controls the inflation and deflation unit to fill the airbag unit with the filling gas to perform the blood pressure measurement step, thereby avoiding blood pressure measurement in an incorrect posture, resulting in inaccurate blood pressure measurement results.

1: Wrist blood pressure measuring device

10: Wearable pressure-applying component

11: Airbag unit

13: Wearable unit

20: Control components

21: Processing unit

211: Big Data Database

22: Posture sensing unit

23: Sound sensor unit

231: Radio

232:Amplifier

233:Filter

234:Signal converter

24: Inflation and deflation unit

25: Output unit

26: Operation unit

27: Pressure sensing unit

Claims (9)

A wrist blood pressure measuring device is worn on a wrist of a user, and the wrist blood pressure measuring device comprises: a wearable pressure-applying assembly worn on the wrist, comprising an airbag unit and a wearable unit for fixing the airbag unit to the wrist of the user; a posture sensing unit configured to detect whether the wrist of the user is at a predetermined tilt angle; a sound sensing unit configured to detect a heart sound of the user; a processing unit coupled to the posture sensing unit and the sound sensing unit, and the processing unit outputs a signal related to the tilt angle and the heart sound; an inflation/deflation unit connected to the airbag unit, the inflation/deflation unit being configured to fill the airbag unit with a filling gas based on the signal so that the wearable pressure-applying assembly applies a pressure to the wrist; a pressure sensing unit coupled to the airbag unit and configured to transmit the detected pressure to the processing unit, the processing unit generating a blood pressure data according to the pressure; and an output unit coupled to the processing unit and configured to output a measurement result related to the blood pressure data. A wrist blood pressure measuring device as described in claim 1, wherein the posture sensing unit is an acceleration sensor. A wrist-type blood pressure measuring device as described in claim 1, wherein the sound sensing unit is a microphone. A wrist blood pressure measuring device as described in claim 1, wherein the inflation/deflation unit is a pump. A wrist blood pressure measuring device as described in claim 1, wherein the output unit is a display screen, a speaker, or a combination of the display screen and the speaker. A wrist blood pressure measuring device as described in claim 1, wherein the blood pressure data includes systolic pressure, diastolic pressure, pulse and heart rhythm. The wrist blood pressure measuring device as described in claim 1, wherein when the posture sensing unit detects that the tilt angle is not within the pre-specified range, the wrist blood pressure measuring device is in an unactivated state. A wrist-type blood pressure measuring device as described in claim 1, wherein the sound sensing unit performs a heart sound matching algorithm based on a big data database associated with multiple heart sound data to determine whether the heart sound is detected. The wrist blood pressure measuring device as described in claim 1, wherein when the sound sensing unit does not detect the heart sound, the wrist blood pressure measuring device is in an unactivated state.

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