A wearable respiratory physiological parameter measuring device

Abstract

The invention discloses a wearable respiratory physiological parameter measuring device, comprising a respiratory sensor and an adjustable waist belt (1); the adjustable waist belt (1) binds the respiratory sensor to the waist of a user; the respiratory sensor comprises a packaging shell base (2), a packaging shell top (3), a pressure detection module, a signal processing module, and a data transmission module; the invention has a simple structure and can convert the rise and fall of the chest and abdomen during breathing into a continuous electrical signal, and after circuit processing, can obtain respiratory frequency and deep breathing completion information.

Description

Technical Field

[0001] The present invention relates to the technical fields of wearable devices and physiological parameter measurement, and in particular to a wearable respiratory physiological parameter measurement device. Background Art

[0002] Respiratory physiological parameter measurement is usually used in medical, fitness and other technical fields. In the prior art, there are many ways to measure respiratory frequency and amplitude. However, the existing measurement equipment has a complex structure, poor sensitivity, and low accuracy. There is less useful information in the collected data, and effective information is easily lost, making it difficult to detect complete signals. The method of measuring respiratory physiological parameters by detecting the humidity changes of exhaled and inhaled gases during breathing through graphene oxide aerogel membranes has a relatively simple respiratory information, and the implementation method is complex, which is not convenient to carry and use. Summary of the invention

[0003] The purpose of the invention is to provide a wearable respiratory physiological parameter measuring device, comprising a respiratory sensor and an adjustable waist belt.

[0004] The adjustable waist belt secures the breathing sensor to the user's waist.

[0005] The breathing sensor comprises a packaging shell base, a packaging shell top, a pressure detection module, a signal processing module, and a data transmission module.

[0006] The packaging housing base includes a first pressing portion.

[0007] The top of the packaging shell includes a second pressure applying portion.

[0008] The pressure detection module includes a bridge-type piezoelectric sensor.

[0009] A portion of the bridge-type piezoelectric sensor is fixed to the first pressure-applying portion, and another portion is fixed to the second pressure-applying portion;

[0010] The bridge-type piezoelectric sensor monitors the pressure applied by the first pressure-applying part and the second pressure-applying part to the bridge-type piezoelectric sensor, and transmits the pressure electrical signal to the signal processing module.

[0011] The signal processing module processes the pressure electrical signal to obtain the respiratory frequency and the degree of deep breathing completion, and transmits them to the data transmission module.

[0012] The data transmission module transmits the respiratory frequency and the deep breathing completion degree to an external device.

[0013] Furthermore, the base of the packaging shell further comprises at least one pair of waist belt connecting beams, which are respectively fixed to two ends of the adjustable waist belt, and the waist belt connecting beams connect the adjustable waist belt into a closed loop.

[0014] Furthermore, the bridge-type piezoelectric sensor is a bridge-type piezoelectric sensor based on a cantilever beam.

[0015] Furthermore, the base of the packaging shell is not fixed to the top of the packaging shell.

[0016] Furthermore, after the user wears the adjustable waist belt, the chest and abdomen expand when inhaling, pushing the top of the packaging shell toward the base of the packaging shell, and the chest and abdomen compress when exhaling, causing the top of the packaging shell to move away from the base of the packaging shell.

[0017] Furthermore, the signal processing module processes the pressure electrical signal to obtain the respiratory frequency and the degree of deep breathing completion, including:

[0018] 1) The signal processing module pre-processes the pressure electrical signal, including filtering and amplification.

[0019] 2) The signal processing module generates a breathing curve based on the preprocessed pressure electrical signal.

[0020] 3) Determine the respiratory rate based on the number of times the respiratory curve peaks appear within time t;

[0021] Calculate the average deep breathing completion rate C within time t ave ,Right now:

[0022]

[0023] In the formula, n represents the number of deep breaths in time t;

[0024] Among them, the deep breathing completion degree C of the i-th deep breathing within time t i As shown below:

[0025]

[0026] In the formula, f i is the breathing amplitude of the ith deep breath; f max It is the maximum breathing amplitude in n deep breaths within time t; the breathing amplitude is the difference between the peak and trough values ​​of the breathing curve.

[0027] Furthermore, the signal processing module, the data transmission module and the power supply module are integrated on a PCB circuit board. The PCB circuit board is fixed on the base of the packaging shell.

[0028] Furthermore, it also includes an indication module integrated on a PCB circuit board; the indication module converts the breathing curve generated by the signal processing module into an inhalation curve and an exhalation curve, thereby indicating the fluctuation of the chest and abdomen during breathing;

[0029] Furthermore, the indication module is also used to indicate the wearing status of the tester;

[0030] In a test state before use, the indication module converts the breathing curve generated by the signal processing module into an inhalation curve and an exhalation curve, thereby indicating the wearing state of the tester;

[0031] When the inhalation curve lacks a peak, the indication module issues an alarm, indicating that the wearer is wearing the clothes too tightly;

[0032] When the exhalation curve lacks a peak, the indication module issues an alarm, indicating that the wearer is too loose.

[0033] Furthermore, it also includes a power supply module for supplying power to the pressure detection module, the signal processing module, the data transmission module, and the indication module.

[0034] The technical effect of the present invention is unquestionable. The present invention has a simple structure and can convert the rise and fall of the chest and abdomen during breathing into a continuous electrical signal. After circuit processing, the respiratory frequency and deep breathing completion information can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a stereoscopic diagram of a wearable respiratory physiological parameter measuring device;

[0036] Figure 2 It is a schematic diagram of the base of the packaging shell;

[0037] Figure 3 It is a schematic diagram of a PCB circuit board;

[0038] Figure 4 It is a schematic diagram of the top of the packaging shell;

[0039] Figure 5 Schematic diagram of a bridge-type piezoelectric sensor based on a cantilever beam;

[0040] Figure 6 This is the circuit schematic diagram of a bridge-type piezoelectric sensor based on a cantilever beam;

[0041] Figure 7 This is a schematic diagram comparing the respiratory curves collected by this device and other devices;

[0042] In the figure, there are an adjustable belt 1, a packaging shell base 2, a packaging shell top 3, a first pressure-applying part 4, a belt connecting beam 5, a PCB circuit board 6, a second pressure-applying part 7, a bridge-type piezoelectric sensor 8, a fixing hole A9, a fixing hole B10, a fixing hole C11, a fixing hole D12, a base 13 and a baffle 14. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0044] Embodiment 1:

[0045] See also Figure 1 , 2 , 3, 4, 5, 6, 7, a wearable respiratory physiological parameter measuring device, comprising a respiratory sensor and an adjustable belt 1.

[0046] The adjustable waist belt 1 fastens the breathing sensor around the waist of the user.

[0047] The breathing sensor comprises a packaging shell base 2, a packaging shell top 3, a pressure detection module, a signal processing module, and a data transmission module.

[0048] The packaging housing base 2 includes a first pressing portion 4 .

[0049] The top 3 of the packaging shell includes a second pressure-applying portion 7 .

[0050] The pressure detection module includes a bridge-type piezoelectric sensor 8 .

[0051] A part of the bridge-type piezoelectric sensor 8 is fixed to the first pressure-applying part 4, and another part is fixed to the second pressure-applying part 7; specifically, the bridge-type piezoelectric sensor 8, the first pressure-applying part 4, and the second pressure-applying part 7 are all provided with fixing holes for bolts to pass through; the fixing holes are threaded. A part of the bridge-type piezoelectric sensor 8 is connected to the first pressure-applying part 4 by bolts, and another part of the bridge-type piezoelectric sensor 8 is connected to the second pressure-applying part 7 by bolts.

[0052] Specifically, the fixing hole of the first pressure-applying part 4 and the fixing hole A ( Figure 5 Middle 9), fixing hole B ( Figure 5 10) corresponds to the fixing hole C ( Figure 5 Middle 11), fixing hole D( Figure 5 12) corresponds to the fixing hole of the second pressure-applying part 7 and is connected by bolts.

[0053] The bridge-type piezoelectric sensor 8 monitors the pressure applied by the first pressure-applying part 4 and the second pressure-applying part 7 to the bridge-type piezoelectric sensor 8 , and transmits the pressure electrical signal to the signal processing module.

[0054] The signal processing module processes the pressure electrical signal to obtain the respiratory frequency and the degree of deep breathing completion, and transmits them to the data transmission module.

[0055] The data transmission module transmits the respiratory frequency and the deep breathing completion degree to an external device.

[0056] The encapsulation shell base 2 further comprises at least one pair of waist belt connecting beams 5. The waist belt connecting beams 5 are respectively fixed to two ends of the adjustable waist belt 1. The waist belt connecting beams 5 connect the adjustable waist belt 1 into a closed loop.

[0057] The bridge-type piezoelectric sensor 8 is a bridge-type piezoelectric sensor based on a cantilever beam.

[0058] The packaging shell base 2 and the packaging shell top 3 are not fixed.

[0059] After the user wears the adjustable waist belt 1 , the chest and abdomen expand during inhalation, pushing the top 3 of the packaging shell toward the base 2 of the packaging shell. During exhalation, the chest and abdomen compress, causing the top 3 of the packaging shell to move away from the base 2 of the packaging shell.

[0060] The signal processing module processes the pressure electrical signal to obtain the respiratory frequency and the degree of deep breathing completion, including:

[0061] 1) The signal processing module pre-processes the pressure electrical signal, including filtering and amplification.

[0062] 2) The signal processing module generates a breathing curve based on the preprocessed pressure electrical signal.

[0063] 3) Determine the respiratory rate based on the number of times the respiratory curve peaks appear within time t;

[0064] Calculate the average deep breathing completion rate C within time t ave ,Right now:

[0065]

[0066] In the formula, n represents the number of deep breaths in time t;

[0067] Among them, the deep breathing completion degree C of the i-th deep breathing within time t i As shown below:

[0068]

[0069] In the formula, f i is the breathing amplitude of the ith deep breath; f max It is the maximum breathing amplitude in n deep breaths within time t; the breathing amplitude is the difference between the peak and trough values ​​of the breathing curve.

[0070] The signal processing module, the data transmission module and the power supply module are integrated on a PCB circuit board 6. The PCB circuit board 6 is fixed on the base 2 of the packaging shell.

[0071] It also includes an indication module integrated on the PCB circuit board 6.

[0072] The indicator module has two functions: 1. Indicate the changes in the chest and abdomen during breathing; 2. Indicate the adjustment of wearing tightness in the test state before formal use. After the test state is over, the second function of the indicator module is turned off.

[0073] The indication module is used to convert the breathing curve generated by the signal processing module into an inhalation curve and an exhalation curve; the inhalation curve and the exhalation curve can dynamically reflect the fluctuation of the chest and abdomen of the user when breathing; Figure 7 As shown in the first figure, the red curve is the inhalation curve, and the blue curve is the exhalation curve;

[0074] After the user puts on the device, the device enters a test state: when the inhalation curve lacks a peak, the indicator module issues an alarm, indicating that the device is worn too tightly;

[0075] When the exhalation curve lacks a peak, the indication module issues an alarm, indicating that the wearer is too loose;

[0076] After the user follows the prompts to adjust the tightness, the breathing training mode is entered. The indicator module no longer prompts the wearing tightness, but only indicates the rise and fall of the chest and abdomen during breathing.

[0077] It also includes a power supply module for supplying power to the pressure detection module, the signal processing module, the data transmission module, and the indication module.

[0078] Embodiment 2:

[0079] A wearable respiratory physiological parameter measuring device comprises: a respiratory sensor and an adjustable belt 1 connected to the respiratory sensor, wherein the adjustable belt 1 is used to tie the respiratory sensor to the waist of a human body; the respiratory sensor comprises: a packaging shell base 2, a pressure detection module, a signal processing module, a data transmission module, a power supply module and a packaging shell top 3; Figure 1 4 is a three-dimensional diagram of a wearable respiratory physiological parameter measuring device in an embodiment of the present invention.

[0080] like Figure 2 As shown, the encapsulating shell base 2 includes: a first pressure-applying portion 4 and a pair of waist belt connecting beams 5 ; the waist belt connecting beams 5 are used to be fixed to the two ends of the adjustable waist belt 1 .

[0081] like Figure 3As shown, the signal processing module, the indication module, the data transmission module and the power supply module are integrated on a PCB circuit board 6; the PCB circuit board 6 is fixed to the base 2 of the packaging shell.

[0082] like Figure 4 As shown, the top 3 of the packaging shell includes: a second pressure-applying portion 7;

[0083] like Figure 5 As shown, the cantilever beam-based bridge-type piezoelectric sensor includes four fixing holes: fixing hole A ( Figure 5 Middle 9), fixing hole B ( Figure 5 Middle 10) Fixing hole C ( Figure 5 Middle 11), fixing hole D( Figure 5 12), the fixing hole has threads;

[0084] The pressure detection module includes: a first pressure part 4, a bridge-type piezoelectric sensor 8 based on a cantilever beam, and a second pressure part 7; the specific fixing method is: a bolt passes through a fixing hole A ( Figure 5 Middle 9), fixing hole B ( Figure 5 10) is fixed, the fixing hole C ( Figure 5 Middle 11), fixing hole D( Figure 5 12) is fixed to the second pressure part 7, and the fixing method is also that the bolt passes through the second pressure part 7 and is fixed to the thread in the fixing hole on the bridge-type piezoelectric sensor 8; the thickness of the first pressure part 4 is 0.5-1mm, and the thickness of the second pressure part 7 is 0.8-1.2mm.

[0085] Among them, the pressure detection module detects the pressure applied by the first pressure-applying part 4 and the second pressure-applying part 7 to the cantilever beam-based bridge-type piezoelectric sensor 8 at the same time, and generates a corresponding electrical signal. The signal processing module is used to process the electrical signal generated by the pressure detection module, including circuit processing such as filtering and amplification, and analyzes and calculates the waveform obtained after processing to obtain the respiratory frequency and deep breathing completion information; the data transmission module is used to transmit the respiratory frequency and deep breathing completion information to a mobile phone or a blood pressure meter; the power supply module is used to provide power to the device.

[0086] The top 3 of the package shell further includes a base 13 and a baffle 14; the base 2 of the package shell further includes a USB Type-C opening and a group of indicator lights, which are not shown in detail; the PCB circuit board 6 also integrates a USB Type-C interface, which is not shown in detail; the USB Type-C opening and the USB Type-C interface are used for charging and wired data transmission, and the indicator light is used to indicate the pressure of the breathing sensor;

[0087] The top 3 of the package shell is close to the user's body, and is connected to the fixing hole A ( Figure 5 Middle 9), fixing hole B ( Figure 5 10), the base 2 of the package shell is fixed with the fixing hole C ( Figure 5 Middle 11), fixing hole D( Figure 5 12) is fixed, except that the top 3 of the packaging shell is not fixedly connected to the base 2 of the packaging shell;

[0088] The adjustable belt 1 binds the breathing sensor to the waist and abdomen of the human body through the belt connecting beam 5 on the packaging shell. Therefore, the position of the base 2 of the packaging shell can be regarded as relatively fixed, and the top 3 of the packaging shell is connected to the base 2 of the packaging shell only through a bridge-type piezoelectric sensor 8 based on a cantilever beam. This connection has a certain degree of mobility and can be regarded as a piston-type connection. When breathing, the rise and fall of the chest and abdomen of the user will cause relative displacement between the top 3 of the packaging shell and the base 2 of the packaging shell. When inhaling, the expansion of the chest and abdomen pushes the top 3 of the packaging shell to move closer to the base 2 of the packaging shell. When exhaling, the chest and abdomen are compressed, and the top 3 of the packaging shell moves away from the base 2 of the packaging shell.

[0089] The magnitude of the above relative displacement is determined by the thickness of the base 13, which is 0.9 mm to 2 mm. The baffle 14 prevents the top 3 of the packaging shell from infinitely displacing toward the base 2 of the packaging shell, thereby damaging the cantilever beam-based bridge-type piezoelectric sensor 8. Preferably, the thickness of the baffle 14 is 0.7 to 1.5 mm.

[0090] When breathing, the rise and fall of the chest and abdomen of the user causes relative displacement between the top 3 and the base 2 of the package shell. At the same time, the bridge-type piezoelectric sensor 8 based on the cantilever beam detects the pressure from the first pressure-applying part 4 and the second pressure-applying part 7. Figure 6 It is a circuit schematic diagram of a bridge-type piezoelectric sensor 8 based on a cantilever beam. When subjected to pressure from the first pressure-applying part 4 and the second pressure-applying part 7, the balance of the bridge is broken. Therefore, the force applied to the sensor can be converted into an electrical signal according to changes in circuit parameters. The electrical signal is then processed by a signal processing unit to generate a respiratory dynamic curve, and the required respiratory physiological parameters such as respiratory frequency, respiratory amplitude, respiratory acceleration, respiratory force, etc. are obtained through calculation.

[0091] The PCB circuit board 6 is also integrated with an indication module, including indicator lights and / or speakers, etc.; the indication module is used to analyze the waveform generated by the signal processing module, control the on and off of the indicator lights, and use a corresponding number of indicator lights to indicate the fluctuation of the chest and abdomen during breathing. The greater the amplitude of the chest and abdomen bulging during inhalation, the more indicator lights will light up, and the deeper the degree of chest and abdomen compression during exhalation, the fewer indicator lights will light up; at the same time, if the waveform lacks complete peaks and / or troughs, an indication will be made to prompt that the wearing is too loose or too tight, and the indication method can be acoustic signal indication and / or optical signal indication, etc.; when the user inhales to the maximum limit, the indicator lights should all light up, otherwise it means that the wearing is too loose, and the speaker will issue a command to prompt that it needs to be tightened; when exhaling to the maximum limit, the indicator lights should all go out, otherwise it means that the wearing is too tight, and the speaker will issue a command to prompt that it needs to be loosened; this can ensure that the wearing tightness is at the best appropriate degree, according to the wearing condition after adjusting the tightness. Figure 7 As shown, the upper figure is the respiratory curve collected after the indication module of the device is adjusted, and the lower figure is the respiratory curve collected by other respiratory rate measurement devices.

[0092] After adjusting the tightness according to the indication module, a complete breathing curve with peaks and troughs can be obtained, such as Figure 7 The first figure shows the complete breathing curve. Figure 7 The second figure shows the breathing curve without peaks and troughs. The maximum breathing amplitude f can be calculated based on the complete breathing curve. max and single breath amplitude f i According to formula (1), the average deep breathing completion degree C within time t can be calculated ave :

[0093]

[0094] Where n represents the number of deep breaths within time t, C i The deep breathing completion degree of the i-th deep breath within time t is as follows:

[0095]

[0096] In the formula, f i is the breathing amplitude of the ith deep breath; f max It is the maximum breathing amplitude in n deep breaths within time t; the breathing amplitude is the difference between the peak and trough values ​​of the breathing curve.

[0097] By counting the number of times x when the peak of the respiratory curve appears within a period of time, respiratory frequency information such as respiratory frequency within one minute and respiratory frequency within one hour can be obtained.

[0098] Finally, the data transmission module transmits the breathing rate and deep breathing completion information to the mobile phone or blood pressure meter.

Claims

1. A wearable respiratory physiological parameter measuring device, characterized in that: Includes a breathing sensor and an adjustable waist belt (1); The adjustable waist belt (1) binds the breathing sensor to the waist of the user; The breathing sensor comprises a packaging shell base (2), a packaging shell top (3), a pressure detection module, a signal processing module, and a data transmission module; The packaging shell base (2) comprises a first pressure-applying portion (4); The top of the packaging shell (3) comprises a second pressure-applying portion (7); The top (3) of the packaging shell is connected to the base (2) of the packaging shell only through a bridge-type piezoelectric sensor (8) based on a cantilever beam, and the connection is a piston-type connection; The pressure detection module comprises a bridge-type piezoelectric sensor (8); A portion of the bridge-type piezoelectric sensor (8) is fixed to the first pressure-applying portion (4), and another portion is fixed to the second pressure-applying portion (7); The bridge-type piezoelectric sensor (8), the first pressure-applying part (4), and the second pressure-applying part (7) are all provided with fixing holes for bolts to pass through; the fixing holes are threaded; a portion of the bridge-type piezoelectric sensor (8) is connected to the first pressure-applying part (4) by means of bolts, and another portion of the bridge-type piezoelectric sensor (8) is connected to the second pressure-applying part (7) by means of bolts; The bridge-type piezoelectric sensor (8) monitors the pressure applied by the first pressure-applying part (4) and the second pressure-applying part (7) to the bridge-type piezoelectric sensor (8), and transmits the pressure electrical signal to the signal processing module; The signal processing module processes the pressure electrical signal to obtain the respiratory frequency and the degree of deep breathing completion, and transmits them to the data transmission module; The data transmission module transmits the respiratory frequency and the degree of deep breathing completion to an external device; The signal processing module processes the pressure electrical signal to obtain the respiratory frequency and the degree of deep breathing completion, including: 1) The signal processing module pre-processes the pressure electrical signal, including filtering and amplification; 2) The signal processing module generates a breathing curve according to the preprocessed pressure electrical signal; 3) Determine the respiratory rate based on the number of times the respiratory curve peaks appear within time t; Calculate the average deep breathing completion rate C within time t ave ,Right now: In the formula, n represents the number of deep breaths in time t; Among them, the deep breathing completion degree of the i-th deep breath within time t C i As shown below: In the formula, f i is the breathing amplitude of the ith deep breath; f max is the maximum breathing amplitude in n deep breaths within time t; the breathing amplitude is the difference between the peak and trough values ​​of the breathing curve; The signal processing module, the data transmission module and the power supply module are integrated on a PCB circuit board (6); the PCB circuit board (6) is fixed on the base (2) of the packaging shell; The wearable respiratory physiological parameter measurement device also includes an indication module integrated on a PCB circuit board (6); the indication module converts the respiratory curve generated by the signal processing module into an inhalation curve and an exhalation curve, thereby indicating the fluctuation of the chest and abdomen during breathing; The indication module is also used to indicate the wearing status of the tester; The indication module monitors the inhalation curve and the respiratory curve in real time: When the inhalation curve lacks a peak, the indication module issues an alarm, indicating that the wearer is wearing the clothes too tightly; When the exhalation curve lacks a peak, the indication module issues an alarm, indicating that the wearer is too loose; After the user follows the prompts to adjust the tightness, the breathing training mode is entered. The indicator module no longer prompts the tightness of the wearer, but only indicates the changes in the chest and abdomen during breathing; The indication module includes an indicator light and / or a speaker; the indication module is used to analyze the waveform generated by the signal processing module, control the on and off of the indicator light, and use a corresponding number of indicator lights to indicate the fluctuation of the chest and abdomen during breathing. The greater the amplitude of the chest and abdomen bulging during inhalation, the more the indicator lights that light up; the deeper the degree of chest and abdomen compression during exhalation, the fewer the indicator lights that light up; if the waveform lacks complete peaks and / or troughs, an indication will be given to indicate that the wearer is too loose or too tight; when the user inhales to the maximum limit, the indicator lights should all light up, otherwise it means that the wearer is too loose, and the speaker will issue a command to prompt that it needs to be tightened; when the user exhales to the maximum limit, the indicator lights should all go out, otherwise it means that the wearer is too tight, and the speaker will issue a command to prompt that it needs to be loosened; The packaging shell base (2) and the packaging shell top (3) are not fixed; The packaging shell base (2) further comprises at least one pair of waist belt connecting beams (5); the waist belt connecting beams (5) are respectively fixed to two ends of the adjustable waist belt (1); the waist belt connecting beams (5) connect the adjustable waist belt (1) into a closed loop; After the user wears the adjustable waist belt (1), when inhaling, the chest and abdomen expand, pushing the top of the encapsulation shell (3) toward the base of the encapsulation shell (2), and when exhaling, the chest and abdomen compress, causing the top of the encapsulation shell (3) to move in a direction away from the base of the encapsulation shell (2); The top of the packaging shell (3) also includes a base (13) and a baffle (14); When breathing, the rise and fall of the chest and abdomen of the user causes relative displacement between the top (3) of the packaging shell and the base (2) of the packaging shell, and the magnitude of the relative displacement is determined by the thickness of the base (13), which is 0.9 mm to 2 mm. The baffle (14) is used to prevent the top (3) of the packaging shell from infinitely displacing toward the base (2) of the packaging shell, thereby causing damage to the bridge-type piezoelectric sensor (8) based on the cantilever beam. The thickness of the baffle (14) is 0.7 to 1.5 mm.

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