WO2017117739A1 - Sleep monitoring system - Google Patents

Abstract

A sleep monitoring system, comprising a collection terminal (110), a server (130) and a mobile terminal (150), wherein the collection terminal (110) comprises a piezoelectric sensing unit, and the piezoelectric sensing unit is used to collect a pressure signal generated by a change in physical signs of a user during sleep and convert the pressure signal into a voltage signal for output; the server (130) receives the voltage signal by means of communication with the collection terminal (110), processes the voltage signal so as to obtain physical sign data, and obtains a sleep monitoring result according to the physical sign data; and the mobile terminal (150) is used to receive and display the physical sign data and/or the sleep monitoring result output by the server (130). The sleep monitoring system has a high accuracy rate and a simple structure.

Description

Sleep monitoring system Technical field

The present invention relates to the field of smart device technologies, and in particular, to a sleep monitoring system.

Background technique

Sleep disorders are one of the important causes of the formation and deterioration of many diseases. Long-term lack of sleep can easily lead to various physiological functions of the human body. Seriously, a series of peripheral lesions will also occur. Therefore, sleep monitoring has become an important part of health monitoring.

Most of the household sleep monitoring products on the market today are wearable, such as smart wristbands and watches that are carried on the wrist of the user. These products have built-in acceleration sensors to determine whether the limbs of the user occur according to the acceleration change value monitored by the acceleration sensor. Swing, and then get sleep monitoring results, such as the number of user turn over, sleep duration and so on. However, the judgment of such products on sleep monitoring results mainly depends on the judgment of the user's limb movement, so it is easy to produce false positives and the accuracy is low.

Medical sleep monitoring products generally obtain sleep monitoring results by monitoring the user's heartbeat and breathing. Although these products have higher accuracy in the determination of sleep monitoring results, the structure is too complicated.

Summary of the invention

Based on this, it is necessary to provide a sleep monitoring system to solve the problem that the existing sleep monitoring system is either low in accuracy or complicated in structure.

In order to solve the above technical problems, the following technical solutions will be adopted:

A sleep monitoring system includes a collection terminal and a server; wherein

The collecting terminal includes a piezoelectric sensing unit, and the piezoelectric sensing unit is configured to collect a pressure signal generated by a change in a physical sign of a user's sleep, and convert the pressure signal into a voltage signal output;

The server receives the voltage signal through communication with the collection terminal, processes the voltage signal to obtain vital sign data, and obtains a sleep monitoring result according to the physical sign data;

The mobile terminal is configured to receive and display the vital sign data and/or the output by the server The results of sleep monitoring.

Further, the collection terminal further includes a signal amplifying unit, a signal filtering unit, and an analog-to-digital conversion unit; wherein

The signal filtering unit is electrically connected to the signal amplifying unit and the analog to digital converting unit, respectively, and the signal amplifying unit electrical signal is connected to the piezoelectric sensing unit.

Further, the number of the piezoelectric sensing units is two, which are respectively used for collecting a pressure signal generated by a change in respiratory signs in the user's sleep and a pressure signal generated by a change in the pulse sign.

Further, the number of the signal amplifying unit and the signal filtering unit are respectively two;

The piezoelectric sensing unit, the signal amplifying unit and the signal filtering unit are sequentially connected to each other to form an output path corresponding to the change of the respiratory sign and an output path corresponding to the change of the pulse sign to respectively output a gentle signal and a pulse sign related to the respiratory sign. Related tip pulse signals.

Further, the collection terminal further includes a micro processing unit and a wireless communication unit electrically connected to the micro processing unit;

The micro processing unit is coupled to the module data conversion unit for controlling the wireless communication unit to transmit the digital voltage signal to the server.

Further, the collection terminal further includes a control circuit board on which a capacitor, the signal amplifying unit, the signal filtering unit, the analog-to-digital conversion unit, and the wireless communication unit are disposed; ,

The piezoelectric sensing unit is connected to an electrical signal at both ends of the capacitor by two wires that are led out;

The two ends of the capacitor are connected to the micro processing unit by being electrically connected to the signal amplifying unit, the signal filtering unit, and the analog to digital conversion unit.

Further, the piezoelectric sensing unit is a monitoring film mainly composed of a piezoelectric material, and the periphery of the monitoring film is surrounded by an insulating film, and the upper and lower surfaces of the insulating film are respectively pasted with a plated copper foil electrode. A polyester film which is led out by two wires.

Further, the server includes a pressure signal calculation unit, a vital sign data calculation unit, and a monitoring result acquisition unit;

The pressure signal calculation unit is configured to calculate the pressure signal from the voltage signal according to a relationship between a pressure received by the piezoelectric material in the piezoelectric sensing unit and a generated voltage;

The vital sign data calculation unit is configured to calculate the vital sign data according to the pressure signal;

The monitoring result obtaining unit is configured to obtain the sleep monitoring result according to the vital sign data.

Further, the vital sign data calculation unit includes a frequency calculation subunit and an intensity calculation subunit;

The frequency calculation subunit and the intensity calculation subunit are respectively used to calculate frequency and intensity components of the vital sign data.

According to the above technical solution, the sleep monitoring system converts the pressure signal generated by the user's physical sign change into a voltage signal output through the piezoelectric sensing unit in the collecting terminal, and then the server obtains the vital sign data according to the received voltage signal, thereby obtaining the user. Sleep monitoring results. Since the user is in a sleep state and a non-sleep state, or at different stages of the sleep state, the vital signs data will show corresponding changes. Therefore, the data basis determined based on the vital sign data as the sleep monitoring result is more intuitive and reliable; and, according to this, The sleep monitoring result can also avoid the interference caused by the user's limb movement. It can be seen that the sleep monitoring system not only has a simple structure, but also ensures the accuracy of the sleep monitoring result.

DRAWINGS

1 is a schematic structural view of a sleep monitoring system in an embodiment;

2 is a schematic structural diagram of an acquisition terminal in an embodiment;

3 is a schematic structural diagram of an acquisition terminal in another embodiment;

4 is a schematic structural diagram of a server in an embodiment;

Fig. 5 is a schematic structural view of a body sign data calculation unit in an embodiment.

detailed description

Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of various modifications in the various embodiments and this invention.

As described above, the existing home sleep monitoring product acquires the acceleration generated by the user's limb movement through the built-in acceleration sensor, and determines the sleep monitoring result according to the acceleration. But acceleration There is no direct connection between the presence or absence of the size and the user's sleep condition. For example, the user unconsciously turns over during sleep, and the acceleration sensor obtains the corresponding acceleration; or the user does not go to sleep but just lies calmly. At this time, the acceleration sensor will not acquire the acceleration. It can be seen that the sleep monitoring result obtained by using the acceleration as a basis for determination is not accurate. In addition, medical sleep monitoring products are generally technically complex, require professional operation, and have a large area and high cost, which cannot meet the needs of daily sleep monitoring of users.

In view of this, a sleep monitoring system is proposed to achieve the purpose of high accuracy and simple structure.

In one embodiment, specifically, the sleep monitoring system, as shown in FIG. 1, includes a collection terminal 110 and a server 130. among them,

The collecting terminal 110 includes a piezoelectric sensing unit for collecting a pressure signal generated by a change in a physical sign of the user's sleep, and converting the pressure signal into a voltage signal output.

Body signs mainly include heart rate, pulse, blood pressure, body temperature, breathing, etc. Activities such as heart beat, pulse beat, and breathing can cause the skin surface of the user to vibrate regularly. The collection terminal 110 collects the pressure signal generated by the vibration by contacting the body-related part of the user.

The piezoelectric sensing unit is a piezoelectric sensor with a piezoelectric material inside, and the piezoelectric material generates a voltage signal output corresponding to the received pressure signal.

The server 130 is configured to receive a voltage signal through communication with the collection terminal, process the voltage signal to obtain the vital sign data, and obtain a sleep monitoring result according to the vital sign data.

The server calculates the pressure signal collected by the collecting terminal according to the received voltage signal, and the pressure signal is caused by the change of the user's vital sign, and thus the vital sign data can be obtained according to the pressure signal.

Further, the user's sleep monitoring results can be obtained according to the physical data and the medical knowledge, such as the user's sleep time, sleep time, sleep quality, and the like.

Specifically, the server 130 is a cloud server.

It can be seen from the above scheme that the sleep monitoring system collects the sensor component collected by the piezoelectric sensing unit in the terminal as the vital sign data, and the server calculates the physical sign data of the user according to the voltage signal output by the collecting terminal, thereby obtaining the sleep state of the user. The collection terminal can be in contact with the user's body related parts in a form that can be worn, and does not cause inconvenience to the user's sleep, and the collection terminal has no electricity. Magnetic interference is suitable for various user groups.

As shown in FIG. 2, in another embodiment, the collection terminal 110 further includes a signal amplification unit 111, a signal filtering unit 113, and an analog to digital conversion unit 115. among them,

The signal filtering unit 113 is electrically connected to the signal amplifying unit 111 and the analog to digital converting unit 115, respectively, and the signal amplifying unit 111 is electrically connected to the piezoelectric sensing unit.

In another embodiment, the number of the piezoelectric sensing units is two, which are respectively used for collecting a pressure signal generated by a change in respiratory signs and a pressure signal generated by a change in a pulse sign in a user's sleep. For convenience of description, they are called a respiratory piezoelectric sensing unit and a pulse piezoelectric sensing unit, respectively.

The respiratory piezoelectric sensing unit is configured to collect a pressure signal generated by vibration of the skin surface when the user breathes, and convert the pressure signal into a voltage signal output. The skin surface vibration caused by breathing is a periodic enhancement and weakening process, and thus, the voltage curve drawn according to the relationship between the voltage signal output by the respiratory piezoelectric sensing unit and time is a sinusoidal curved shape. When in use, the collection terminal containing the respiratory piezoelectric sensing unit can be placed against the skin at the user's abdomen.

The pulse piezoelectric sensing unit is configured to collect a pressure signal generated by skin surface vibration when the user beats the pulse, and convert the pressure signal into a voltage signal output. The skin surface vibration caused by the pulse beat is strongly vibrated for a short time, and therefore, the voltage curve drawn according to the relationship between the voltage signal outputted by the pulse piezoelectric sensing unit and time is a tip pulse. In use, the collection terminal containing the pulse piezoelectric sensing unit can be placed in close contact with the skin at the user's radial artery.

Correspondingly, there are also two numbers of the signal amplifying unit 111 and the signal filtering unit 113, and the piezoelectric sensing unit, the signal amplifying unit 111 and the signal filtering unit 113 are sequentially connected with electric signals to form an output corresponding to the respiratory sign change. The output path corresponding to the path and the pulse sign changes to respectively output a gentle signal related to respiratory signs and a pulse signal related to the pulse sign. Similarly, for convenience of description, they are respectively referred to as a respiratory signal amplifying unit, a pulse signal amplifying unit, and a respiratory signal filtering unit and a pulse signal filtering unit.

In general, the normal number of breaths ranges from 15 to 50 beats per minute, and the normal pulse beat ranges from 50 to 170 beats per minute. The respiratory signal filtering unit is configured to filter the voltage signal amplified by the respiratory signal amplifying unit, leaving only an approximate sine wave signal of 15 to 50 cycles per minute; similarly, the pulse signal filtering unit is configured to transmit the pulse signal Amplifying unit amplifies the processed voltage signal Filtering is performed, leaving only a tip pulse signal of 50 to 170 times per minute.

As shown in FIG. 3, in another embodiment, the collection terminal 110 further includes a micro processing unit 117 and a wireless communication unit 119 electrically coupled to the micro processing unit 117.

The micro processing unit 117 is electrically connected to the analog-to-digital conversion unit 115 for receiving the analog-to-digital conversion processed voltage signal output by the analog-to-digital conversion unit 115, and controls the wireless communication unit 119 to convert the analog-to-digital conversion. The voltage signal is transmitted to the server 130 by way of wireless transmission.

In another embodiment, the piezoelectric sensing unit comprises a monitoring film mainly composed of a PVDF (polyvinylidene fluoride) novel polymer composite piezoelectric material, and the periphery of the monitoring film is surrounded by an insulating film, the upper surface of the insulating film A polyester film coated with a constantan foil electrode is attached to the lower side. The constant copper foil electrode is used to protect and qualitatively monitor the shape of the film, to avoid short circuits, and to transmit signals. The constantan foil electrode is led out by two wires.

In addition, the collection terminal 110 further includes a control circuit board on which a capacitor, a signal amplifying unit 111, a signal filtering unit 113, an analog-to-digital conversion unit 115, and a wireless communication unit 119 are disposed. among them,

The piezoelectric sensing unit is connected to the electrical signal at both ends of the capacitor through two wires to access the control circuit board;

The two ends of the capacitor are electrically connected to the signal amplifying unit 111, the signal filtering unit 113, and the analog-to-digital conversion unit 115, and then connected to the micro processing unit 117;

The microprocessing unit 117 is electrically coupled to the wireless communication unit 119 to control communication between the wireless communication unit 119 and the server 130.

As shown in FIG. 4, in another embodiment, the server 130 includes a pressure signal calculation unit 131, a vital sign data calculation unit 133, and a monitoring result acquisition 135. among them,

The pressure signal calculation unit 131 is configured to calculate the pressure signal from the voltage signal according to the relationship between the pressure received by the piezoelectric material in the piezoelectric sensing unit and the generated voltage.

The vibration caused by the change of the user's sign causes the piezoelectric material in the piezoelectric sensing unit to generate a charge, and the electric charge is collected at the two ends of the capacitor on the control circuit board through the electrode, thereby generating a voltage across the capacitor. The relationship between capacitance and voltage is as follows:

Where U is the voltage, Q is the amount of charge, and C is the capacitance.

The formula for a piezoelectric material to be subjected to pressure without an electric field is as follows:

D=d·σ

Where D is the magnitude and direction of stress, d is the matrix of piezoelectric stress constants, and σ is the magnitude of charge in the direction of the area of the piezoelectric material.

The total charge formula produced by the piezoelectric material is as follows:

Q=A·K·σ

Where A is the area of the piezoelectric material and K is the sensitivity coefficient of the piezoelectric material.

According to the above formula, the relationship between the pressure applied by the piezoelectric material and the generated voltage can be obtained as follows:

D=d·U/(A·K·C)

It can be seen that the pressure applied by the piezoelectric material is proportional to the voltage generated.

The vital sign data calculation unit 133 is configured to calculate the vital sign data based on the voltage signal.

According to the voltage signal processing, the relationship between the voltage signal and the time is obtained, and according to the correspondence between the pressure signal received by the piezoelectric material and the generated voltage signal, the relationship between the corresponding pressure signal and time is obtained, and then according to the pressure signal and time. The relationship data can be obtained.

The monitoring result obtaining unit 135 is configured to obtain a sleep monitoring result according to the vital sign data.

As shown in FIG. 5, in another embodiment, the vital sign data calculation unit 133 includes a frequency calculation sub-unit 1331 and an intensity calculation sub-unit 1333. among them,

The frequency calculation sub-unit 1331 and the intensity calculation sub-unit 1335 are used to calculate the frequency and intensity components of the vital sign data, respectively.

Accordingly, the monitoring result acquisition unit 135 obtains the sleep monitoring result based on the frequency and intensity components of the vital sign data. For example, the obtained respiratory frequency, intensity, or pulse frequency, intensity, and other parameters are unstable, which may be caused by the user's limb movements, and the user is considered to have not entered the sleep state; When the parameters such as respiratory rate, intensity, pulse rate, and intensity are relatively stable, the user is considered to be in a sleep state.

In another embodiment, the sleep monitoring system further comprises:

The mobile terminal 150 is configured to receive and display the vital sign data and/or the sleep monitoring result output by the server.

The mobile terminal 150 includes various mobile terminals having a display function such as a notebook, a PAD, a mobile phone, and the like.

After the server determines the sleep monitoring result, the graph drawn according to the vital sign data and the sleep monitoring result are sent to the user's mobile terminal 150 by wired or wireless communication, so that the user can check the physical vitality data of the user while sleeping on the mobile terminal 150. And sleep.

While the invention has been described with respect to the preferred embodiments the embodiments The present invention may be embodied in a variety of forms without departing from the spirit or scope of the invention. It is to be understood that the invention is not limited to the details of the invention. All changes and modifications that come within the scope of the claims or the equivalents thereof are intended to be covered by the appended claims.

Claims (9)

A sleep monitoring system, comprising: a collection terminal, a server, and a mobile terminal; wherein The collecting terminal includes a piezoelectric sensing unit, and the piezoelectric sensing unit is configured to collect a pressure signal generated by a change in a physical sign of a user's sleep, and convert the pressure signal into a voltage signal output; The server receives the voltage signal through communication with the collection terminal, processes the voltage signal to obtain vital sign data, and obtains a sleep monitoring result according to the physical sign data; The mobile terminal is configured to receive and display the vital sign data and/or the sleep monitoring result output by the server. The sleep monitoring system according to claim 1, wherein the collection terminal further comprises a signal amplifying unit, a signal filtering unit and an analog to digital conversion unit; The signal filtering unit is electrically connected to the signal amplifying unit and the analog to digital converting unit, respectively, and the signal amplifying unit electrical signal is connected to the piezoelectric sensing unit. The sleep monitoring system according to claim 2, wherein the number of the piezoelectric sensing units is two, which are respectively used for collecting a pressure signal generated by a change in respiratory signs and a pressure signal generated by a change in a pulse sign of a user during sleep. . The sleep monitoring system according to claim 3, wherein the number of the signal amplifying unit and the signal filtering unit are respectively two; The piezoelectric sensing unit, the signal amplifying unit and the signal filtering unit are sequentially connected to each other to form an output path corresponding to the change of the respiratory sign and an output path corresponding to the change of the pulse sign to respectively output a gentle signal and a pulse sign related to the respiratory sign. Related tip pulse signals. The sleep monitoring system according to claim 3, wherein the collection terminal further comprises a micro processing unit and a wireless communication unit electrically connected to the micro processing unit; The micro processing unit is coupled to the module data conversion unit for controlling the wireless communication unit to transmit the digital voltage signal to the server. The sleep monitoring system according to claim 5, wherein the collection terminal further comprises a control circuit board on which a capacitor, the signal amplification unit, and the a signal filtering unit, the analog to digital conversion unit, and the wireless communication unit; wherein The piezoelectric sensing unit is connected to an electrical signal at both ends of the capacitor by two wires that are led out; The two ends of the capacitor are connected to the micro processing unit by being electrically connected to the signal amplifying unit, the signal filtering unit, and the analog to digital conversion unit. The sleep monitoring system according to claim 6, wherein the piezoelectric sensing unit is a monitoring film mainly composed of a piezoelectric material, and the periphery of the monitoring film is surrounded by an insulating film, the upper surface of the insulating film A polyester film coated with a constantan foil electrode is attached to the lower side, and the constantan foil electrode is taken out by two wires. The sleep monitoring system according to claim 1, wherein the server comprises a pressure signal calculation unit, a vital sign data calculation unit, and a monitoring result acquisition unit; The pressure signal calculation unit is configured to calculate the pressure signal from the voltage signal according to a relationship between a pressure received by the piezoelectric material in the piezoelectric sensing unit and a generated voltage; The vital sign data calculation unit is configured to calculate the vital sign data according to the pressure signal; The monitoring result obtaining unit is configured to obtain the sleep monitoring result according to the vital sign data. The sleep monitoring system according to claim 8, wherein the vital sign data calculation unit comprises a frequency calculation subunit and an intensity calculation subunit; The frequency calculation subunit and the intensity calculation subunit are respectively used to calculate frequency and intensity components of the vital sign data.

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