WO2020177033A1

WO2020177033A1 - Vital sign monitoring method, device and system

Info

Publication number: WO2020177033A1
Application number: PCT/CN2019/076761
Authority: WO
Inventors: 叶飞
Original assignee: 深圳市大耳马科技有限公司
Priority date: 2019-03-01
Filing date: 2019-03-01
Publication date: 2020-09-10
Also published as: CN113164048A; CN113164048B

Abstract

The present invention is applicable in the field of signal monitoring. Provided are a vital sign monitoring method, device (100) and system. The method comprises: S101, acquiring vital sign monitoring data, collected by a first vibration sensor (1011, 200), of a first object (A), and body motion information, collected by a second vibration sensor (1012, 300), of a second object (B); and S102, according to the body motion information of the second object (B), determining whether body motion of the second object (B) interferes with the collected vital sign monitoring data of the first object (A), and if so, processing the interference of the body motion of the second object (B) with the collected vital sign monitoring data of the first object (A), otherwise directly returning to S101. When the first object (A) and the second object (B) lie on the same bed or mattress, the interference of the body motion of the second object (B) with the collected vital sign monitoring data of the first object (A) can be eliminated or reduced, such that the probability of leading to an error in monitoring of vital sign parameters of a subject can be substantially reduced, thereby greatly reducing the rate of misdiagnosis.

Description

Method, equipment and system for monitoring vital signs

Technical field

The invention belongs to the field of signal monitoring, and particularly relates to a method, equipment and system for monitoring vital signs.

Background technique

With the rapid development of science and technology, more and more products based on vibration sensing technology applied to vital signs monitoring have sprung up. Because the subject does not need to wear any sensors on the body, it can meet the long-term monitoring needs. Based on its signal capture method, the best use scenario is to use it in sleep. Therefore, a large number of products based on vibration sensing technology are applied to vital signs monitoring, especially sleep monitoring (such as vibration monitoring pads). However, since the first vibration sensor is sensitive to vibration, it is susceptible to interference from the external environment, so there is a greater challenge when two or more people are lying on the same bed.

As shown in Figure 1, suppose that subject A is a subject who uses a vibration monitoring pad for vital signs monitoring. Subject A and non-subject B sleep on the same bed at the same time. The bed is placed with a vibration monitoring pad. Subject A was lying on the vibration monitoring pad. When the non-subject B and the subject A are very close and both lie on the vibration monitoring pad at the same time, the vital signs signals of the non-subject B will be combined with the original signals collected by the vibration monitoring pad, and the subject The original signal components of person A and non-subject B are more difficult to separate, which will affect the measurement results of subject A and even cause diagnosis errors; if non-subject B does not lie on the vibration monitoring pad, but non-subject B performs Different degrees of body movement, the final vibration transmission to the vibration monitoring pad may also introduce a signal equivalent to the energy amplitude of the subject A’s own signal. At this time, the original signal components of subject A and non-subject B are also more difficult to peel. It will also affect the measurement results and even cause diagnostic errors; when the two scenarios are combined, there will be more complex measurement effects. Therefore, the vibration monitoring mat presents a greater challenge in the application scenario where two or more people are lying on the same bed.

technical problem

The purpose of the present invention is to provide a vital sign monitoring method, device, computer readable storage medium and system, which aims to solve the problem that the first vibration sensor used for vital sign monitoring is when two or more people are lying on the same bed. In the application scenario, non-subjects will affect the subject’s measurement results.

Technical solutions

In the first aspect, the present invention provides a method for monitoring vital signs, the method comprising:

S101: Acquire vital sign monitoring data of a first object collected by a first vibration sensor and body movement information of a second object collected by a second vibration sensor;

S102. Determine, according to the body movement information of the second subject, whether the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject, and if so, the body movement of the second subject affects the collected first subject Disturbance caused by the vital signs monitoring data is processed, otherwise, directly return to S101.

In a second aspect, the present invention provides a computer-readable storage medium that stores a computer program that, when executed by a processor, implements the steps of the vital signs monitoring method.

In a third aspect, the present invention provides a vital signs monitoring device, including: one or more processors, memories, and one or more computer programs, wherein the processor and the memory are connected through a bus, and the one One or more computer programs are stored in the memory and configured to be executed by the one or more processors, and the processor implements the steps of the vital signs monitoring method when the computer programs are executed.

In a fourth aspect, the present invention provides a vital sign monitoring system, including the vital sign monitoring device as described, one or more first vibration sensors for collecting vital sign monitoring data of a first subject, and One or more second vibration sensors for the body movement information of the two objects, wherein the first vibration sensor and the second vibration sensor are respectively connected to the vital signs monitoring device.

Beneficial effect

In the present invention, since the body movement information of the second object is collected by the second vibration sensor, when the body movement information of the second object is judged to cause interference with the collected vital sign monitoring data of the first object When the first object and the second object are lying on the same bed or mattress, it can eliminate or reduce the movement of the second object caused by the collected vital sign monitoring data of the first object. Interference can greatly reduce the probability that the subject's vital signs parameters may be monitored incorrectly, thereby greatly reducing the misdiagnosis rate.

Description of the drawings

Figure 1 is a schematic diagram of the use of the vibration monitoring pad when two people are lying on the same bed.

Fig. 2 is a flowchart of a vital signs monitoring method according to Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram of the use of the first vibration sensor and the second vibration sensor when the first object and the second object are lying on the same bed.

Fig. 4 is a schematic diagram of using the first vibration sensor and the distance measuring module when the first object and the second object are lying on the same bed.

FIG. 5 is a schematic diagram of judging whether the distance information is less than a preset threshold when the second distance measuring module in the distance measuring module pair is configured to be placed at the edge of the bedside on the side of the first object.

FIG. 6 is a schematic diagram of judging whether the distance information is greater than a preset threshold when the first distance measuring module in the distance measuring module pair is configured to be placed at the edge of the bedside of the second object side.

Fig. 7 is a specific structural block diagram of a vital signs monitoring device provided in Embodiment 3 of the present invention.

Fig. 8 is a specific structural block diagram of the vital signs monitoring system provided by the fourth embodiment of the present invention.

Embodiments of the invention

In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

In order to illustrate the technical solution of the present invention, specific embodiments are used for description below.

Example one:

Please refer to FIG. 2. The vital signs monitoring method provided in the first embodiment of the present invention includes the following steps: It should be noted that if the results are substantially the same, the vital signs monitoring method provided in the first embodiment of the present invention is not based on the one shown in FIG. 2 The sequence of the processes shown is limited.

Among them, the first subject is a subject, and the second subject is a non-subject. As shown in FIG. 3, the first subject and the second subject are lying on the same bed or mattress. The first vibration sensor 1011 is configured to be placed under the body of the first subject A, and the first subject is in a supine, prone, side-lying or semi-lying state, and the first vibration sensor may be specifically configured to be placed in contact with the first object. Shoulder, back, waist or hip contact. The second vibration sensor 1012 is configured to be placed on the body of the second subject B in a position that can sense the movement of the second subject, such as placed in a jacket pocket, tied to the shoulder, tied to a waistband, worn on the wrist, etc. . There may be one or more second objects, and each second object may be configured with one or more second vibration sensors.

The first vibration sensor and the second vibration sensor are one of an acceleration sensor, a speed sensor, a displacement sensor, a pressure sensor, a strain sensor, or a sensor that converts physical quantities equivalently based on acceleration, speed, pressure, or displacement. Kind or more.

When each second object is equipped with multiple second vibration sensors, the body movement information of the second object is comprehensively judged by the body movement information of the second object collected by the multiple second vibration sensors to obtain the final body movement information , So as to obtain a more accurate body movement monitoring effect. For example, the average value of the body movement information of the second object collected by the plurality of second vibration sensors is used as the final body movement information.

In the first embodiment of the present invention, before S101, the method further includes the following steps:

S201: Control to turn on the second vibration sensor to collect body movement information of the second object;

S202. Acquire body movement information of the second object collected by the second vibration sensor.

S203: Determine whether the body motion of the second subject will interfere with the collected vital sign monitoring data of the first subject according to the body motion information of the second subject, if yes, return to S202, otherwise, execute S204;

S204: Control to turn on the first vibration sensor to collect vital sign monitoring data of the first object.

In the first embodiment of the present invention, before S101, the method may further include the following steps:

Control to turn on the second vibration sensor to collect body movement information of the second object and turn on the first vibration sensor to collect vital sign monitoring data of the first object.

In the first embodiment of the present invention, the processing of the interference caused by the body movement of the second object to the collected vital sign monitoring data of the first object may specifically be:

Determine the vital sign monitoring data of the first subject acquired during the time period when the body motion of the second subject interferes with the collected vital sign monitoring data of the first subject as invalid data, and then return to S101.

The processing of the interference caused by the body movement of the second subject to the collected vital sign monitoring data of the first subject may also specifically be:

S1021. Determine the vital sign monitoring data of the first subject acquired during the time period when the body motion of the second subject interferes with the collected vital sign monitoring data of the first subject as invalid data;

S1022: Controlling and turning off the first vibration sensor to collect vital sign monitoring data of the first object to reduce calculation and power consumption;

S1023. Acquire body movement information of the second object collected by the second vibration sensor.

S1024. Determine whether the body motion of the second object will interfere with the collected vital sign monitoring data of the first object according to the body motion information of the second object. If yes, return to S1023; otherwise, control to turn on the first vibration sensor to collect the first object. Monitor the vital signs of the subject, and then return to S101.

In the first embodiment of the present invention, at the same time as S1021 or after S1021, the method may further include the following steps:

The control turns on a stimulator (such as a vibration stimulator, an electric shock stimulator, etc.) that is configured to be placed on the second subject B and used to prompt the second subject to pay attention to the body movement behavior.

The judging whether the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject according to the body movement information of the second subject may specifically be:

Calculate the body movement intensity according to the body movement information of the second object;

It is judged whether the body movement intensity exceeds a preset threshold, and if so, it is judged that the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject.

The judging whether the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject according to the body movement information of the second subject may also specifically be:

According to the body movement information of the second object, it is judged whether the second object has body movement, and if so, it is judged that the body movement of the second object will interfere with the collected vital sign monitoring data of the first object.

In the first embodiment of the present invention, S101 may further include the following steps:

Acquiring distance information collected by the ranging module, the distance information being used to determine whether the second object will interfere with the collected vital sign monitoring data of the first object;

Correspondingly, S102 may further include the following steps:

Determine whether the second subject will interfere with the collected vital sign monitoring data of the first subject according to the distance information, and if so, deal with the interference caused by the second subject to the collected vital sign monitoring data of the first subject, Otherwise, return to S101 directly.

Referring to FIG. 4, the first ranging module 1013 of the ranging module pair is configured to be placed anywhere on the body of the second object B, such as placed in a jacket pocket, tied to the shoulder, tied to the waist belt, Wear it on your wrist, etc. The second ranging module 1014 in the ranging module pair is configured to be placed in any fixed position (such as any position on the mattress plane, the foot of the bed, or even a certain position in the area that does not belong to the bed), as shown in Figure 4 It is placed at the edge of the headboard on the side A of the first object.

The first ranging module in the ranging module pair is the signal transmitting end, and the second ranging module is the signal receiving end. Of course, the first ranging module is the signal receiving end and the second ranging module is the signal transmitting end. .

The distance measurement module pair can be any module that can be used for distance measurement, such as an infrared distance measurement module pair, an ultrasonic distance measurement module pair, an acoustic distance measurement module pair, and so on. Considering human health, a non-radiation distance measurement solution is preferred, such as Pair of infrared ranging modules.

In the first embodiment of the present invention, in order to obtain a more accurate positioning effect, the distance information may be collected by multiple pairs of distance measurement modules. Multiple sets of ranging module pairs may include one second ranging module and multiple first ranging modules, and each second object is configured with multiple first ranging modules; or, multiple sets of ranging module pairs may include one first ranging module. A ranging module and a plurality of second ranging modules, each second object is configured with a first ranging module, and the plurality of second ranging modules are configured to be placed in a plurality of different arbitrary fixed positions, such as multiple second The distance measurement module is located at multiple different positions on the mattress plane, etc.; or, multiple groups of distance measurement module pairs may include multiple first distance measurement modules and multiple second distance measurement modules, and each second object is configured with multiple second distance measurement modules. A ranging module, and a plurality of second ranging modules are configured to be placed in a plurality of different arbitrary fixed positions.

When the distance information is collected by multiple groups of distance measurement module pairs, the distance information is comprehensively calculated from the distance information collected by the multiple groups of distance measurement modules to obtain the final distance information. For example, the average value of the distance information collected by multiple groups of distance measurement modules is used as the final distance information.

Please refer to FIG. 5, which is a schematic diagram of judging whether the distance information is less than a preset threshold when the second distance measuring module of the distance measuring module pair is configured to be placed on the side of the first object (for example, the edge of the bed). Take the second ranging module 1014 as the center, draw a circle with a suitable radius r, and take the arc and the bed edge as the boundary, as the shaded part in the figure, define this area as the "affected area", that is, when the second object During sleep, if the first ranging module 1013 enters the area, we think that the second object will interfere with the collected vital sign monitoring data of the first object. At this time, since the second ranging module is on the side of the first object, in this scenario, determining whether the second object will interfere with the collected vital sign monitoring data of the first object according to the distance information may specifically be :

Determine whether the distance information is less than a preset threshold, and if so, determine that the second object will interfere with the collected vital sign monitoring data of the first object. The preset threshold is that the second object may lie down on the vibration sensor It is the distance collected by the ranging module when the distance between the second object and the vibration sensor is less than an empirical value. The empirical value refers to the interval when the second object is not lying on the vibration sensor, but is relatively close to the vibration sensor, which will interfere with the vital sign monitoring data of the first object. The preset threshold may be a maximum value, a minimum value, an average value over a period of time, etc., of the distance that the second object may lie on the vibration sensor measured in advance after actual scene simulation. In this embodiment, it may be the minimum value.

Please refer to FIG. 6, which is a schematic diagram of judging whether the distance information is greater than a preset threshold when the first distance measuring module in the distance measuring module pair is configured to be placed on the second object side (for example, at the edge of the bed). Take the second ranging module 1014 as the center, draw a circle with a suitable radius r, and take the arc and the bed edge as the boundary, as the shaded part in the figure, define this area as the "affected area", that is, when the second object During sleep, if the first ranging module 1013 enters the area, we think that the second object will interfere with the collected vital sign monitoring data of the first object. At this time, since the second ranging module is on the side of the second object, in this scenario, determining whether the second object will interfere with the collected vital sign monitoring data of the first object according to the distance information may specifically be :

Determine whether the distance information is greater than a preset threshold, if yes, then determine that the second object will interfere with the collected vital sign monitoring data of the first object, and the preset threshold is that the second object may lie down on the vibration sensor It is the distance collected by the ranging module when the distance between the second object and the vibration sensor is less than an empirical value. The empirical value refers to the interval when the second object is not lying on the vibration sensor, but is relatively close to the vibration sensor, which will interfere with the vital sign monitoring data of the first object. The preset threshold may be a maximum value, a minimum value, an intermediate value between the maximum value and the minimum value of the distance that the second object may lie on the vibration sensor measured in advance after actual scene simulation. In this embodiment, it can be the maximum value.

Embodiment two:

The second embodiment of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the vital signs monitoring method provided in the first embodiment of the present invention. step.

Example three:

Fig. 7 shows a specific structural block diagram of a vital signs monitoring device 100 provided in Embodiment 3 of the present invention. The vital signs monitoring device 100 includes: one or more processors 101, a memory 102, and one or more computer programs, wherein The processor 101 and the memory 102 are connected by a bus, the one or more computer programs are stored in the memory 102 and are configured to be executed by the one or more processors 101, and the processor 101 implements the steps of the vital signs monitoring method provided in the first embodiment of the present invention when the computer program is executed.

Embodiment four:

Referring to FIG. 8, the vital sign monitoring system provided in the fourth embodiment of the present invention includes the vital sign monitoring device 100 provided in the third embodiment of the present invention, and one or more first vibration sensors for collecting vital sign monitoring data of a first subject 200 and one or more second vibration sensors 300 for collecting body movement information of the second object. Wherein, the first vibration sensor 200 and the second vibration sensor 300 are respectively connected to the vital signs monitoring device 100, which may be connected through a signal line or connected in a wireless manner.

In the fourth embodiment of the present invention, the vital signs monitoring system may further include a pair of ranging modules that collect distance information, wherein the pair of ranging modules is connected to the vital signs monitoring device, which may be connected through a signal line or wirelessly. .

In the fourth embodiment of the present invention, the vital sign monitoring system may further include a stimulator (for example, a vibration stimulator, an electric shock stimulator, etc.) configured to be placed on the second subject and used to prompt the second subject to pay attention to the physical behavior. The stimulator is connected to the vital signs monitoring device 100, which may be connected through a signal line or wirelessly.

A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by a program instructing relevant hardware. The program can be stored in a computer-readable storage medium, and the storage medium can include: Read Only Memory (ROM, Read Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disks or CDs, etc.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

A method for monitoring vital signs, characterized in that the method includes:

S101: Acquire vital sign monitoring data of a first object collected by a first vibration sensor and body movement information of a second object collected by a second vibration sensor;

S102. Determine, according to the body movement information of the second subject, whether the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject, and if so, the body movement of the second subject affects the collected first subject Disturbance caused by the vital signs monitoring data is processed, otherwise, directly return to S101.
The method of claim 1, wherein the S101 further comprises:

Acquiring distance information collected by the ranging module, the distance information being used to determine whether the second object will interfere with the collected vital sign monitoring data of the first object;

The S102 further includes:

Determine whether the second subject will interfere with the collected vital sign monitoring data of the first subject according to the distance information, and if so, deal with the interference caused by the second subject to the collected vital sign monitoring data of the first subject, Otherwise, return to S101 directly.
The method of claim 1 or 2, wherein the first subject is a subject, the second subject is a non-subject, the first subject and the second subject are lying on the same bed or mattress, and A vibration sensor is configured to be placed under the body of the first object, and the second vibration sensor is configured to be placed on the body of the second object at a position that can sense the body movement of the second object.
The method of claim 1, wherein the first subject is in a supine, prone, side or semi-lying state, and the first vibration sensor is configured to be placed on the shoulders, back, and waist of the first subject. Or hip contact.
The method according to claim 3, wherein there are one or more second objects, and each second object is configured with one or more second vibration sensors.
The method of claim 5, wherein when each second object is equipped with multiple second vibration sensors, the body movement information of the second object is collected by the second object from the multiple second vibration sensors. The body movement information is comprehensively judged to obtain the final body movement information.
7. The method of claim 6, wherein the body movement information of the second object collected by the plurality of second vibration sensors is comprehensively judged to obtain the final body movement information specifically:

The average value of the body movement information of the second object collected by the plurality of second vibration sensors is used as the final body movement information.
The method according to claim 1 or 2, characterized in that, before S101, the method further comprises:

S201: Control to turn on the second vibration sensor to collect body movement information of the second object;

S202. Acquire body movement information of the second object collected by the second vibration sensor.

S203: Determine whether the body motion of the second subject will interfere with the collected vital sign monitoring data of the first subject according to the body motion information of the second subject, if yes, return to S202, otherwise, execute S204;

S204: Control to turn on the first vibration sensor to collect vital sign monitoring data of the first object;

or,

Before S101, the method further includes:

Control to turn on the second vibration sensor to collect body movement information of the second object and turn on the first vibration sensor to collect vital sign monitoring data of the first object.
The method according to claim 1 or 2, wherein the processing the interference caused by the body movement of the second subject to the collected vital sign monitoring data of the first subject specifically includes:

Determine the vital sign monitoring data of the first subject acquired during the time period when the body motion of the second subject interferes with the collected vital sign monitoring data of the first subject as invalid data, and then return to S101.
The method according to claim 1 or 2, wherein the processing the interference caused by the body movement of the second subject to the collected vital sign monitoring data of the first subject specifically includes:

S1021. Determine the vital sign monitoring data of the first subject acquired during the time period when the body motion of the second subject interferes with the collected vital sign monitoring data of the first subject as invalid data;

S1022, controlling to turn off the first vibration sensor to collect vital sign monitoring data of the first object to reduce calculation and power consumption;

S1023. Acquire body movement information of the second object collected by the second vibration sensor.

S1024. Determine whether the body motion of the second object will interfere with the collected vital sign monitoring data of the first object according to the body motion information of the second object. If yes, return to S1023; otherwise, control to turn on the first vibration sensor to collect the first object. Monitor the vital signs of the subject, and then return to S101.
The method according to claim 10, wherein at the same time as S1021 or after S1021, the method further comprises:

The stimulator is configured to be placed on the second subject to prompt the second subject to pay attention to the body movement behavior.
The method according to claim 1 or 2, wherein the judging whether the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject according to the body movement information of the second subject specifically comprises:

Calculate the body movement intensity according to the body movement information of the second object;

It is judged whether the body movement intensity exceeds a preset threshold, and if so, it is judged that the body movement of the second subject will interfere with the collected vital sign monitoring data of the first subject.
The method of claim 3, wherein the first ranging module in the pair of ranging modules is configured to be placed at any position on the body of the second object, and the second ranging module in the pair of ranging modules is The distance module is configured to be placed in any fixed position.
The method of claim 13, wherein the distance information is collected by multiple groups of distance measurement module pairs;

Multiple sets of ranging module pairs include one second ranging module and multiple first ranging modules, and each second object is configured with multiple first ranging modules; or, multiple sets of ranging module pairs include one first ranging module Module and multiple second ranging modules, each second object is configured with a first ranging module Block, multiple second ranging modules are configured to be placed in multiple different arbitrary fixed positions; or, multiple sets of ranging module pairs include multiple first ranging modules and multiple second ranging modules, each The second object is configured with a plurality of first ranging modules, and the plurality of second ranging modules are configured to be placed in a plurality of different arbitrary fixed positions.
The method according to claim 14, wherein when the distance information is collected by multiple groups of distance measurement module pairs, the distance information is calculated by comprehensive calculation of the distance information collected by multiple groups of distance measurement modules.的distance information.
The method according to claim 13, wherein the second ranging module is on the side of the first object, and said determining whether the second object will interfere with the collected vital sign monitoring data of the first object according to the distance information Specifically:

Determine whether the distance information is less than a preset threshold, and if so, determine that the second object will interfere with the collected vital sign monitoring data of the first object. The preset threshold is that the second object may lie down on the vibration sensor It is the distance collected by the ranging module when the distance between the second object and the vibration sensor is less than an empirical value.
The method of claim 13, wherein the second ranging module is on the side of the second object, and said determining whether the second object will interfere with the collected vital sign monitoring data of the first object according to the distance information Specifically:

Determine whether the distance information is greater than a preset threshold, if yes, then determine that the second object will interfere with the collected vital sign monitoring data of the first object, and the preset threshold is that the second object may lie down on the vibration sensor It is the distance collected by the ranging module when the distance between the second object and the vibration sensor is less than an empirical value.
A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to realize the vital signs monitoring method according to any one of claims 1 to 17 A step of.
A vital signs monitoring device includes: one or more processors, a memory, and one or more computer programs, wherein the processor and the memory are connected by a bus, and the one or more computer programs are stored in In the memory and configured to be executed by the one or more processors, wherein the processor implements the vital signs monitoring according to any one of claims 1 to 17 when the processor executes the computer program Method steps.
A vital sign monitoring system, characterized by comprising the vital sign monitoring device according to claim 19, one or more first vibration sensors for collecting vital sign monitoring data of a first object, and a second One or more second vibration sensors of the body movement information of the object, wherein the first vibration sensor and the second vibration sensor are respectively connected to the vital sign monitoring device.
The system according to claim 20, wherein the vital sign monitoring system further comprises a pair of distance measurement modules that collect distance information, wherein the pair of distance measurement modules are connected to the vital sign monitoring device.
The system according to claim 20, wherein the vital signs monitoring system further comprises a stimulator configured to be placed on the second subject and used to prompt the second subject to pay attention to the physical activity, the stimulator and the vital signs monitoring device connection.