Respiration detection device and respiration detection method
By designing the position sensor in the breath detection device, and using resistance value changes to detect the breathing state, the problems of difficulty in preparing wearable devices and inaccurate detection are solved, and efficient monitoring of the breathing state is achieved.
Patent Information
- Application Number
- CN202510530924.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2025-07-08
AI Technical Summary
Existing wearable devices have problems in the continuous monitoring of respiratory diseases and the inability to accurately detect respiratory status.
A breath detection device is designed, including a detection belt and a detection module. The position sensor uses a position sensor to detect the breathing state through changes in resistance value. The detection module consists of a first sliding assembly, a second sliding assembly, a pressure head and a position sensor, and slides the sliding assembly and the pressure head on the sensor surface to detect the breathing action.
It reduces the difficulty of preparation, improves the accuracy of respiratory state detection, can accurately monitor respiratory movements, and adapt to different respiratory states.
Smart Images
Figure CN120267271A_ABST
Abstract
Description
Technical Field
[0001] This application relates to, but is not limited to, the technical field of sensor devices, and particularly relates to a breathing detection device and a breathing detection method. Background Art
[0002] Continuous monitoring of respiratory diseases is crucial for improving the prognosis of patients and preventing acute attacks. Currently, traditional intermittent pulmonary function tests cannot comprehensively reflect the daily conditions of patients and there are monitoring blind spots. In recent years, the development of wearable devices has provided a new way for continuous monitoring of respiratory diseases. However, existing wearable devices have the disadvantages of high manufacturing difficulty and inability to accurately detect the respiratory state. Summary of the Invention
[0003] The following is an overview of the subject matter described in detail in this document. This overview is not intended to limit the scope of protection of the claims.
[0004] Embodiments of this application provide a breathing detection device and a breathing detection method, which can reduce the manufacturing difficulty and improve the accuracy of detecting the respiratory state.
[0005] To achieve the above object, a first aspect of the embodiments of this application provides a breathing detection device, including:
[0006] A detection belt, including a first belt body, an elastic belt body, and a second belt body that are sequentially connected, and one end of the first belt body away from the elastic belt body is detachably connected to one end of the second belt body away from the elastic belt body;
[0007] A detection module, including a first sliding component, a second sliding component, a pressing head, and a position sensor. The first sliding component is fixed on the first belt body, the position sensor is arranged on the first sliding component, the second sliding component is slidably connected to the first sliding component, one end of the second sliding component away from the first sliding component is fixed on the second belt body, the pressing head is arranged at one end of the second sliding component close to the first sliding component, and the bottom surface of the pressing head is in contact with the surface of the position sensor. The position sensor is used to detect the contact position when the pressing head contacts the position sensor.
[0008] In a possible implementation, the position sensor includes a first flexible substrate and a second flexible substrate. The first flexible substrate has a first end and a second end disposed opposite to each other. A first conductive film and a strip-shaped resistive film are arranged in parallel and spaced apart on the top side of the first flexible substrate. The end portions of the first conductive film and the strip-shaped resistive film, each close to the first end, are respectively connected to a resistance detection circuit for detecting the resistance value of the position sensor. The end portions of the first conductive film and the strip-shaped resistive film, each close to the second end, are interconnected through a second conductive film. The second flexible substrate is disposed at a distance above the first flexible substrate and has the same extension direction as the first flexible substrate. A plurality of third conductive films are provided on the bottom side of the second flexible substrate, and the third conductive films are spaced apart along the extension direction of the second flexible substrate.
[0009] In a possible implementation, the resistance value of the position sensor and the contact distance of the position sensor satisfy the following relationship:
[0010]
[0011] Wherein, L is the contact distance, R is the resistance value of the position sensor, R0 is the resistance value of the strip-shaped resistive film, L0 is the length of the strip-shaped resistive film, and the contact distance is the distance between the contact position and the end portion of the strip-shaped resistive film close to the first end.
[0012] In a possible implementation, the conductivity of the first conductive film, the second conductive film, and the third conductive film is greater than that of the strip-shaped resistive film. The resistance of the strip-shaped resistive film is evenly distributed. The first conductive film and the second conductive film are integrally formed. The extension direction of each third conductive film is perpendicular to the extension direction of the second flexible substrate, and the bottom surface of the indenter matches the shape of the third conductive film.
[0013] In a possible implementation, the first conductive film, the second conductive film, and the third conductive film are all prepared from at least one of copper, silver, gold, or platinum, and the strip-shaped resistive film is prepared from at least one of carbon nanotubes, graphene, carbon fiber, carbon-based material composite cloth, tungsten oxide, zinc oxide, nickel oxide, molybdenum oxide, titanium oxide, or manganese oxide.
[0014] In a possible implementation, the position sensor further includes a cushion layer made of an elastic material. The cushion layer is disposed on the top side of the first flexible substrate, and the bottom side of the second flexible substrate is connected to the cushion layer.
[0015] In a possible implementation, when the pressure of the indenter acts on the position sensor, the thickness of the cushion layer decreases, such that the third conductive film simultaneously contacts the strip-shaped resistance film and the first conductive film, so as to determine the contact position when the indenter contacts the position sensor based on the resistance information of the position sensor.
[0016] To achieve the above object, a second aspect of the embodiments of the present application provides a respiration detection method, including:
[0017] During a detection time period, continuously collect the resistance information of the position sensor in the above-mentioned respiration detection device, where the resistance information is used to indicate the contact position when the indenter contacts the position sensor;
[0018] Construct a respiration signal curve for indicating the respiration state according to the resistance information and the acquisition time point of the resistance information.
[0019] The embodiments of the present application at least include the following beneficial effects: The structure of the respiration detection device is simple, which can reduce the preparation difficulty. Since one end of the first belt body is detachably connected to one end of the second belt body, and the elastic belt body has elasticity, the detection belt can be fixed on the chest or abdomen of the object to be measured. Also, since the first sliding component is fixed on the first belt body, the second sliding component is slidably connected to the first sliding component, one end of the second sliding component away from the first sliding component is fixed on the second belt body, and the indenter is disposed at one end of the second sliding component close to the first sliding component, when the object to be measured inhales, the elastic belt body stretches, thereby driving the second sliding component and the first sliding component to slide, and thus driving the indenter to slide on the surface of the position sensor, such that the contact position when the indenter contacts the position sensor changes. Similarly, when the object to be measured exhales, the elastic belt body returns to its original state, thereby driving the second sliding component and the first sliding component to slide, and thus driving the indenter to slide on the surface of the position sensor, such that the contact position when the indenter contacts the position sensor changes. Therefore, the change situation of the contact position can indicate the respiration state of the object to be measured. By accurately detecting the change situation of the contact position through the position sensor, the accuracy of respiration state detection can be improved.
[0020] Other features and advantages of the present application will be described in the subsequent description, and part of them will be obvious from the description, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. Description of the Drawings
[0021] The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.
[0022] Figure 1 It is an optional structural schematic diagram of the breathing detection device provided by the embodiment of the present application;
[0023] Figure 2 It is an optional partial structural schematic diagram of the breathing detection device provided by the embodiment of the present application;
[0024] Figure 3 It is an optional explosion schematic diagram of the detection module provided by the embodiment of the present application;
[0025] Figure 4 It is an optional structural schematic diagram of the position sensor provided by the embodiment of the present application;
[0026] Figure 5 It is an optional structural schematic diagram of the first flexible substrate provided by the embodiment of the present application;
[0027] Figure 6 It is an optional structural schematic diagram of the second flexible substrate provided by the embodiment of the present application;
[0028] Figure 7 It is an optional side schematic diagram of the position sensor provided by the embodiment of the present application;
[0029] Figure 8 It is an optional relationship diagram between the resistance change rate and the third conductive film being pressed provided by the embodiment of the present application;
[0030] Figure 9 It is an optional schematic diagram of the breathing signal curve provided by the embodiment of the present application;
[0031] Figure 10 It is an optional structural schematic diagram when the position sensor is not pressed provided by the embodiment of the present application;
[0032] Figure 11 It is an optional structural schematic diagram when the position sensor is pressed provided by the embodiment of the present application;
[0033] Figure 12 It is an optional flowchart of the breathing detection method provided by the embodiment of the present application;
[0034] Figure 13 It is an optional hardware structural schematic diagram of the electronic device provided by the embodiment of the present application. Detailed implementation manners
[0035] To make the objectives, technical solutions and advantages of this application clearer and more understandable, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.
[0036] It should be noted that in each specific implementation manner of this application, when it comes to performing relevant processing based on data related to the characteristics of the target object, such as target object attribute information or a set of attribute information, the permission or consent of the target object will be obtained first. Moreover, the collection, use, and processing of these data will comply with relevant laws, regulations, and standards. Among them, the target object can be a user. In addition, when the embodiments of this application need to obtain target object attribute information, the separate permission or separate consent of the target object will be obtained through methods such as pop-up windows or jumping to a confirmation page. After clearly obtaining the separate permission or separate consent of the target object, the necessary target object-related data for the normal operation of the embodiments of this application will be obtained.
[0037] In the description of this application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself.
[0038] It should be noted that although functional module division is carried out in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different module division in the device or a different order in the flowchart. Terms such as "first", "second", etc. in the description, claims, or the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.
[0039] To facilitate the understanding of the technical solutions provided by the embodiments of this application, some key terms used in the embodiments of this application are explained here first:
[0040] Respiration, also known as pulmonary ventilation, is the exchange of air between the lungs and the outside world, manifested as a cycle of inhalation and exhalation. During inhalation, the diaphragm contracts, the thoracic cavity volume increases, and air is thus inhaled into the lungs. On the contrary, during exhalation, the diaphragm relaxes, the thoracic cavity volume decreases, and air is pushed out of the lungs. This process can be monitored through physiological signals such as airflow intensity, frequency, temperature, and the expansion and contraction of the thoracic cavity.
[0041] The continuous monitoring of respiratory diseases is crucial for improving the prognosis of patients and preventing acute attacks. At present, traditional intermittent pulmonary function tests cannot comprehensively reflect the daily conditions of patients and there are monitoring blind spots. In recent years, the development of wearable devices has provided a new way for the continuous monitoring of respiratory diseases. However, existing wearable devices have the disadvantages of high preparation difficulty and inability to accurately detect the respiratory state.
[0042] In view of the problems of high preparation difficulty and inability to accurately detect the breathing state, the present application provides a breathing detection device and a breathing detection method, which can reduce the preparation difficulty and improve the accuracy of breathing state detection.
[0043] The breathing detection device and the breathing detection method provided by the embodiments of the present application will be specifically described through the following embodiments. First, the breathing detection device in the embodiments of the present application will be described.
[0044] The following will further elaborate on the embodiments of the present application in conjunction with the accompanying drawings.
[0045] Refer to Figures 1 to 3 , Figure 1 which is an optional structural schematic diagram of the breathing detection device provided by the embodiments of the present application, Figure 2 which is an optional partial structural schematic diagram of the breathing detection device provided by the embodiments of the present application, Figure 3 which is an optional explosion schematic diagram of the detection module provided by the embodiments of the present application. The embodiments of the present application provide a breathing detection device, including:
[0046] A detection belt 100, including a first belt body 110, an elastic belt body 120, and a second belt body 130 connected in sequence. One end of the first belt body 110 away from the elastic belt body 120 is detachably connected to one end of the second belt body 130 away from the elastic belt body 120;
[0047] A detection module 200, including a first sliding component 210, a second sliding component 220, a pressing head 230, and a position sensor 240. The first sliding component 210 is fixed on the first belt body 110, the position sensor 240 is arranged on the first sliding component 210, the second sliding component 220 is slidably connected to the first sliding component 210, one end of the second sliding component 220 away from the first sliding component 210 is fixed on the second belt body 130, the pressing head 230 is arranged at one end of the second sliding component 220 close to the first sliding component 210, and the bottom surface of the pressing head 230 is in contact with the surface of the position sensor 240. The position sensor 240 is used to detect the contact position when the pressing head 230 contacts the position sensor 240.
[0048] Wherein, one end of the first belt body 110 away from the elastic belt body 120 can be attached to a magic tape with a furry surface, and one end of the second belt body 130 away from the elastic belt body 120 can be attached to a magic tape with a hook surface, so that one end of the first belt body 110 away from the elastic belt body 120 is detachably connected to one end of the second belt body 130 away from the elastic belt body 120, ensuring the stability and comfort of the device.
[0049] Based on this, the structure of the respiration detection device is simple, which can reduce the manufacturing difficulty. Since one end of the first belt body 110 is detachably connected to one end of the second belt body 130, and the elastic belt body 120 has elasticity, the detection belt 100 can be fixed on the chest or abdomen of the object to be measured. Also, since the first sliding assembly 210 is fixed on the first belt body 110, the second sliding assembly 220 is slidably connected to the first sliding assembly 210, one end of the second sliding assembly 220 away from the first sliding assembly 210 is fixed on the second belt body 130, and the pressing head 230 is arranged at one end of the second sliding assembly 220 close to the first sliding assembly 210. When the object to be measured inhales, the elastic belt body 120 stretches, which drives the second sliding assembly 220 to slide relative to the first sliding assembly 210, thereby driving the pressing head 230 to slide on the surface of the position sensor 240, causing the contact position when the pressing head 230 contacts the position sensor 240 to change. Similarly, when the object to be measured exhales, the elastic belt body 120 returns to its original state, which also drives the second sliding assembly 220 to slide relative to the first sliding assembly 210, thereby driving the pressing head 230 to slide on the surface of the position sensor 240, causing the contact position when the pressing head 230 contacts the position sensor 240 to change. Therefore, the change situation of the contact position can indicate the respiration state of the object to be measured. By accurately detecting the change situation of the contact position through the position sensor 240, the accuracy of respiration state detection can be improved.
[0050] In a possible implementation, referring again to Figure 2 and Figure 3 , the second sliding assembly 220 includes a first support portion 310, a connecting portion 320, and a second support portion 330 that are connected in sequence. The first support portion 310 is fixed on the second belt body 130. The second support portion 330 is provided with a chute 331. The first sliding assembly 210 is provided with a slider 311 that cooperates with the chute 331. The first sliding assembly 210 is located between the connecting portion 320 and the detection belt 100.
[0051] Among them, the shape of the slider 311 can be elongated. For example, the extending direction of the slider 311 is the same as the extending direction of the first sliding assembly 210. A groove 333 can be formed at the bottom of the second support portion 330. Chutes 331 can be provided on both side walls of the groove 333. Sliders 311 can be provided on both sides of the first sliding assembly 210. The two sliders 311 are respectively slidably connected to the corresponding chutes 331. During the sliding process, the first sliding assembly 210 can pass through the groove 333.
[0052] It can be understood that since the second sliding component 220 includes a first support portion 310, a connecting portion 320, and a second support portion 330 that are sequentially connected, and the first support portion 310 is fixed to the second belt body 130, the second sliding component 220 can be fixedly connected to the second belt body 130 through the first support portion 310. Also, since the second support portion 330 is provided with a chute 331 and the first sliding component 210 is provided with a slider 311 that cooperates with the chute 331, the second sliding component 220 can be slidably connected to the first sliding component 210 through the second support portion 330. Moreover, since the first sliding component 210 is located between the connecting portion 320 and the detection belt 100, when the second sliding component 220 slides relative to the first sliding component 210, the first sliding component 210 can pass through the area between the connecting portion 320 and the detection belt 100, ensuring the reliability of the sliding process.
[0053] In a possible implementation, referring again to Figure 2 and Figure 3 , the second support portion 330 is provided with a threaded through-hole 332, the axis of the threaded through-hole 332 is perpendicular to the surface of the position sensor 240, and the pressing head 230 is provided with an external thread that matches the threaded through-hole 332, and the pressing head 230 is threadedly connected to the threaded through-hole 332.
[0054] It can be understood that the second support portion 330 is provided with a threaded through-hole 332, the pressing head 230 is provided with an external thread that matches the threaded through-hole 332, and the pressing head 230 is threadedly connected to the threaded through-hole 332, ensuring that the pressing head 230 can be stably embedded in the second support portion 330, and the magnitude of the pressing force of the pressing head 230 on the position sensor 240 can be precisely adjusted by rotating the pressing head 230, so that the pressing head 230 can effectively apply pressure to the position sensor 240, ensuring that the position sensor 240 can accurately detect the contact position when the pressing head 230 contacts the position sensor 240.
[0055] In a possible implementation, referring to Figure 2 , and referring to Figures 4 to 7 , Figure 4 is an optional structural schematic diagram of the position sensor provided by the embodiment of the present application. Figure 5 is an optional structural schematic diagram of the first flexible substrate provided by the embodiment of the present application. Figure 6 is an optional structural schematic diagram of the second flexible substrate provided by the embodiment of the present application. Figure 7 is an optional side view schematic diagram of the position sensor provided by the embodiment of the present application.
[0056] Specifically, the position sensor 240 includes a first flexible substrate 410 and a second flexible substrate 420. The first flexible substrate 410 has a first end and a second end disposed opposite to each other. On the top side of the first flexible substrate 410, a first conductive film 510 and a strip-shaped resistance film 520 are arranged in parallel and spaced apart. The end portions of the first conductive film 510 and the strip-shaped resistance film 520 close to the first end are respectively connected to a resistance detection circuit, and the resistance detection circuit is used to detect the resistance value of the position sensor 240. The end portions of the first conductive film 510 and the strip-shaped resistance film 520 close to the second end are interconnected through a second conductive film 530. The second flexible substrate 420 is disposed above the first flexible substrate 410 at intervals, and the second flexible substrate 420 is consistent with the first flexible substrate 410 in the extending direction. On the bottom side of the second flexible substrate 420, a plurality of third conductive films 540 are provided, and the respective third conductive films 540 are spaced apart along the extending direction of the second flexible substrate 420.
[0057] Among them, the first flexible substrate 410 is an insulator, and the preparation material of the first flexible substrate 410 may include at least one of materials such as silicon dioxide, sapphire, boron nitride, silicon nitride, polydimethylsiloxane, polyimide, and polyester. Similar to the first flexible substrate 410, the second flexible substrate 420 is also an insulator, and the preparation material of the second flexible substrate 420 may also include at least one of materials such as polyethylene terephthalate, polyimide, polydimethylsiloxane, or polyurethane.
[0058] Specifically, the resistance detection circuit can supply current and detect voltage to the end portions of the first conductive film 510 and the strip-shaped resistance film 520 close to the first end. For example, the end portion of the strip-shaped resistance film 520 close to the first end is connected to the positive port of the resistance detection circuit, and the end portion of the first conductive film 510 close to the first end is connected to the negative port of the resistance detection circuit, so that the resistance detection circuit can detect the resistance value of the position sensor 240, that is, the equivalent resistance of the position sensor 240 is detected through the resistance detection circuit.
[0059] Specifically, the sensitive layer of the position sensor 240 includes the first flexible substrate 410, the first conductive film 510, the strip-shaped resistance film 520, and the second conductive film 530, and the short-circuit layer of the position sensor 240 includes the second flexible substrate 420 and the respective third conductive films 540.
[0060] It should be noted that, in order to ensure that when the position sensor 240 is pressed, the third conductive film 540 can simultaneously contact the first conductive film 510 and the strip-shaped resistance film 520, it can be required that the projections of the respective third conductive films 540 on the first flexible substrate 410 coincide at least partially with the projections of the first conductive film 510 on the first flexible substrate 410, and the projections of the respective third conductive films 540 on the first flexible substrate 410 coincide at least partially with the projections of the strip-shaped resistance film 520 on the first flexible substrate 410.
[0061] Based on this, the surface of the position sensor 240 is the surface of the top side of the second flexible substrate 420. By providing the first flexible substrate 410 and the second flexible substrate 420 as the supporting parts of the position sensor 240, then arranging the first conductive film 510 and the strip-shaped resistance film 520 side by side and spaced apart on the top side of the first flexible substrate 410, and arranging a plurality of third conductive films 540 on the bottom side of the second flexible substrate 420. Since the second flexible substrate 420 is spaced above the first flexible substrate 410, when the position sensor 240 is not pressed, the respective third conductive films 540 do not contact the first conductive film 510 and the strip-shaped resistance film 520. Also, since the projections of the respective third conductive films 540 on the first flexible substrate 410 coincide at least partially with the projections of the first conductive film 510 on the first flexible substrate 410, and the projections of the respective third conductive films 540 on the first flexible substrate 410 coincide at least partially with the projections of the strip-shaped resistance film 520 on the first flexible substrate 410, when the position sensor 240 is pressed, some of the third conductive films 540 can simultaneously contact the first conductive film 510 and the strip-shaped resistance film 520. By defining that the extending directions of the first conductive film 510, the strip-shaped resistance film 520, and the first flexible substrate 410 are the same, the ends of the first conductive film 510 and the strip-shaped resistance film 520 close to the second ends are connected to each other through the second conductive film 530. The extending direction of the second flexible substrate 420 is the same as that of the first flexible substrate 410, and the respective third conductive films 540 are distributed at intervals along the extending direction of the second flexible substrate 420. The position sensor 240 only needs to connect the ends of the first conductive film 510 and the strip-shaped resistance film 520 close to the first ends to the resistance detection circuit through two leads, which can reduce the manufacturing process cost. When the breathing of the object to be measured drives the indenter 230 to slide on the surface of the position sensor 240, the change in the resistance value of the position sensor 240 is detected by the resistance detection circuit. The change in the resistance value of the position sensor 240 can characterize the change in the contact position when the indenter 230 contacts the position sensor 240. Therefore, the change in the resistance value can indicate the breathing state of the object to be measured. By accurately detecting the change in the resistance value by the position sensor 240, the accuracy of breathing state detection can be improved.
[0062] It can be understood that when the second flexible substrate 420 is pressed, it will deform. Pressing the position sensor 240 is equivalent to pressing the second flexible substrate 420. When different positions of the position sensor 240 are pressed, the third conductive films 540 at different positions can simultaneously contact the folded resistor film and the strip resistor film 520, causing the equivalent resistance of the position sensor 240 to change. The resistance detection circuit can detect the resistance values when different positions of the position sensor 240 are pressed, that is, detect the equivalent resistance of the position sensor 240. When the third conductive films 540 at different positions are pressed, the degree of change in the resistance value of the position sensor 240 is different. Therefore, the change in the contact position can be determined by the change in the resistance value of the position sensor 240. Essentially, the position sensor 240 is a piezoresistive sensor.
[0063] In a possible implementation manner, the resistance value of the position sensor 240 and the contact distance of the position sensor 240 satisfy the following relationship:
[0064]
[0065] Wherein, L is the contact distance, R is the resistance value of the position sensor 240, R0 is the resistance value of the strip resistor film 520, L0 is the length of the strip resistor film 520, and the contact distance is the distance between the contact position and the end of the strip resistor film 520 close to the first end.
[0066] It can be understood that when the conductivity of the first conductive film 510 is much greater than the conductivity of the strip resistor film 520, the conductivity of the second conductive film 530 is much greater than the conductivity of the strip resistor film 520, and the conductivity of the third conductive film 540 is much greater than the conductivity of the strip resistor film 520, the resistance values of the first conductive film 510, the second conductive film 530, and the third conductive film 540 can be ignored when determining the resistance value of the position sensor 240, and it can be determined that the touch distance of the position sensor 240 has a linear relationship with the resistance value of the position sensor 240.
[0067] It should be noted that is the resistance change rate of the position sensor 240. The multiple third conductive films 540 can be sorted in the direction from the first end to the second end, and specifically, reference can be made to Figure 8 , Figure 8 This is an optional relationship diagram between the resistance change rate provided by the embodiment of the present application and the pressed third conductive film.
[0068] Among them, the position sensor 240 is provided with a total of 48 conductive films. The third conductive film 540 closest to the first end is the first third conductive film 540. The distance between the first third conductive film 540 and the end of the strip-shaped resistance film 520 close to the first end is 2 mm, that is, the displacement of the first third conductive film 540 is 2 mm. The third conductive film 540 closest to the second end is the 48th third conductive film 540, that is, the distance between the 48th third conductive film 540 and the end of the strip-shaped resistance film 520 close to the first end is 96 mm, that is, the displacement of the 48th third conductive film 540 is 96 mm. The other third conductive films 540 can also determine their respective arrangement orders and displacements. When the third conductive films 540 at different positions are pressed, the resistance value of the position sensor 240 changes, causing the resistance change rate to also change, and it can be determined that the resistance change rate has a linear relationship with the arrangement order of the pressed third conductive film 540.
[0069] Then, reference can be made to Figure 9 , Figure 9 which is an optional schematic diagram of the respiration signal curve provided by the embodiment of the present application.
[0070] Among them, the resistance change rate of the position sensor 240 is continuously collected during the detection time period. For example, the detection time period is 50 seconds, and the resistance change rate of the position sensor 240 is collected every 0.1 second during the detection time period. According to all the collected resistance change rates and the collection time points, in the coordinate system with the abscissa being time and the ordinate being the resistance change rate, a respiration signal curve for indicating the respiration state can be constructed. The frequency of the resistance change rate can characterize the respiration frequency of the object to be measured. For example, in the time period from 0 second to 7.5 seconds, the frequency of the resistance change rate is moderate, indicating that the object to be measured is in a normal respiration state; in the time period from 7.5 seconds to 38 seconds, the frequency of the resistance change rate is low, indicating that the object to be measured is in a deep respiration state; in the time period from 38 seconds to 50 seconds, the frequency of the resistance change rate is high, indicating that the object to be measured is in a rapid respiration state; therefore, the respiration signal curve can effectively indicate the respiration state of the object to be measured.
[0071] For example, referring to Figure 10 , Figure 10 which is an optional structural schematic diagram of the position sensor when it is not pressed provided by the embodiment of the present application. The arrow in the figure is used to indicate the direction of current flow. The current sequentially passes through the strip-shaped resistance film 520, the second conductive film 530, and the first conductive film 510. Assuming that the conductivity of the strip-shaped resistance film 520 is ρ, the cross-sectional area is S, and the length is L0, then through measurement, it can be determined that the equivalent resistance when the position sensor 240 is not pressed is R0 is also the resistance value of the strip-shaped resistance film 520.
[0072] Then, referring to Figure 11, Figure 11 This is an optional structural schematic diagram when the position sensor is pressed provided by the embodiment of the present application. The arrows in the figure are used to indicate the direction of current flow. There are 10 third conductive films 540 from left to right. When the position where the 6th third conductive film 540 from the left is pressed, the 6th third conductive film 540 simultaneously contacts the first conductive film 510 and the strip-shaped resistance film 520. The current sequentially passes through part of the strip-shaped resistance film 520, the 6th third conductive film 540, and part of the first conductive film 510. Then, through measurement, it can be determined that the equivalent resistance when the position sensor 240 is pressed is It can be calculated that the ratio between the resistance value when the position sensor 240 is pressed and the resistance value when the position sensor 240 is not pressed is 0.55, that is, the resistance change rate of the position sensor 240 is 0.55. Then, it can be determined that the contact distance is 0.55L0, that is, the contact position is the position that moves 0.55L0 along the extension direction of the strip-shaped resistance film 520 from the end near the first end of the strip-shaped resistance film 520.
[0073] In a possible implementation manner, referring again to Figures 4 to 7 , the conductivity of the first conductive film 510, the second conductive film 530, and the third conductive film 540 is greater than the conductivity of the strip-shaped resistance film 520. The resistance distribution of the strip-shaped resistance film 520 is uniform. The first conductive film 510 and the second conductive film 530 are integrally formed. The extension directions of the respective third conductive films 540 are perpendicular to the extension direction of the second flexible substrate 420. The bottom surface of the indenter 230 matches the shape of the third conductive film 540.
[0074] Specifically, the resistance distribution of the strip-shaped resistance film 520 being uniform may specifically refer to that the line resistance deviation of any region in the strip-shaped resistance film 520 is less than ±5%.
[0075] It can be understood that since the conductivity of the first conductive film 510, the second conductive film 530, and the third conductive film 540 is greater than that of the strip resistance film 520, the resistance values of the first conductive film 510, the second conductive film 530, and the third conductive film 540 can be ignored. When the position sensor 240 is not pressed, each third conductive film 540 does not contact the first conductive film 510 and the strip resistance film 520, and the resistance value of the position sensor 240 is the resistance value of the strip resistance film 520. When the position sensor 240 is pressed, some of the third conductive films 540 can contact the first conductive film 510 and the strip resistance film 520 at the same time, which is equivalent to shunting the current through the contacted third conductive film 540, short-circuiting some areas of the strip resistance film 520 far from the connection resistance detection circuit, thereby changing the current flow path and reducing the resistance value of the position sensor 240. The equivalent resistance of the position sensor 240 is the resistance value of the effective conduction path in the strip resistance film 520. Moreover, when the third conductive films 540 at different positions are pressed, the resistance value of the position sensor 240 is different. Therefore, the resistance change rate of the position sensor 240 can be determined by the ratio between the resistance value when the position sensor 240 is pressed and the resistance value of the strip resistance film 520, thereby completing the position recognition and further realizing the accurate detection of the breathing motion;
[0076] Also, since the resistance distributions of the first conductive film 510, the strip resistance film 520, and the third conductive film 540 are uniform, as the contact position of the position sensor 240 moves uniformly, the resistance change rate of the position sensor 240 will change uniformly, and the change of the resistance change rate can indicate the movement of the contact position. Therefore, the breathing state of the object to be measured can be accurately determined by the change of the resistance change rate of the position sensor 240.
[0077] Specifically, it is assumed that the ratio between the conductivity of the first conductive film 510, the second conductive film 530, and the third conductive film 540 and the conductivity of the strip resistance film 520 is greater than or equal to K. For example, when K is greater than or equal to 10, the conductivity of the first conductive film 510, the second conductive film 530, and the third conductive film 540 is much greater than the conductivity of the strip resistance film 520, and it can also be required that the sheet resistance of the first conductive film 510, the second conductive film 530, and the third conductive film 540 is less than 30 Ω / mil. At this time, the equivalent resistance of the position sensor 240 is the resistance value of the effective conduction path in the strip resistance film 520, and the resistance values of the first conductive film 510, the second conductive film 530, and the third conductive film 540 can be ignored, that is, the first conductive film 510, the second conductive film 530, and the third conductive film 540 are low sheet resistance layers, and the strip resistance film 520 is a high sheet resistance layer. The sheet resistance between the high sheet resistance layer and the low sheet resistance layer usually differs by at least one order of magnitude.
[0078] It can be understood that since the extending directions of the respective third conductive films 540 are perpendicular to the extending direction of the second flexible substrate 420, the extending direction of the third conductive film 540 is perpendicular to the extending direction of the first conductive film 510, and the extending direction of the third conductive film 540 is perpendicular to the extending direction of the strip resistance film 520, which can ensure that the respective third conductive films 540 are not connected. Moreover, when a position where any one of the third conductive films 540 is located is pressed, assuming that the contact point between the pressed third conductive film 540 and the first conductive film 510 is determined as the first contact point, and the contact point between the pressed third conductive film 540 and the strip resistance film 520 is determined as the second contact point, then it can be ensured that the distance between the first contact point and the second contact point is equal to the shortest distance between the first contact point and the strip resistance film 520, making the first contact point and the second contact point as close as possible, thereby improving the detection accuracy of the position sensor 240. Moreover, the bottom surface of the indenter 230 matches the shape of the third conductive film 540, which can ensure that the indenter 230 uniformly applies pressure to the third conductive film 540. In addition, the lengths of the respective third conductive films 540 are the same, so the pressing ranges of the respective optional contact positions in the position sensor 240 are the same. Also, since the respective third conductive films 540 are evenly distributed on the bottom side of the second flexible substrate 420, the respective optional contact positions in the position sensor 240 are evenly distributed, which helps to accurately detect different contact positions of the position sensor 240 and can also avoid misoperations.
[0079] Specifically, assuming that the surface of the third conductive film 540 is rectangular, the indenter 230 may include a main body part and a contact part. The main body part may be a cylinder, and the contact part may be a cuboid, that is, the bottom surface of the indenter 230 is also rectangular, and the size of the bottom surface of the indenter 230 is the same as the size of the surface of the third conductive film 540.
[0080] It should be noted that the distance between two adjacent third conductive films 540 is adjustable. By adjusting the distance, the recognition resolution of the position sensor 240 and the smoothness of the respiration signal curve can be adjusted to adapt to different monitoring requirements and improve the accuracy of data. The recognition resolution of the position sensor 240 is positively correlated with the distribution density of the third conductive films 540. For example, the recognition resolution of the position sensor 240 can reach 1 um.
[0081] In a possible implementation manner, the first conductive film 510, the second conductive film 530, and the third conductive film 540 are all prepared from at least one of copper, silver, gold, or platinum, and the strip resistance film 520 is prepared from at least one of carbon nanotubes, graphene, carbon fiber, carbon-based material composite cloth, tungsten oxide, zinc oxide, nickel oxide, molybdenum oxide, titanium oxide, or manganese oxide.
[0082] It can be understood that by defining the preparation materials of the first conductive film 510, the second conductive film 530, and the third conductive film 540, it is possible to ensure that the first conductive film 510, the second conductive film 530, and the third conductive film 540 have a sufficiently large conductivity. And by defining the preparation materials of the strip-shaped resistance film 520, it is possible to ensure that the strip-shaped resistance film 520 has a sufficiently small conductivity, so that the conductivities of the first conductive film 510, the second conductive film 530, and the third conductive film 540 are all much greater than the conductivity of the strip-shaped resistance film 520, which can further improve the detection effect of the position sensor 240, thereby improving the accuracy of the respiratory state detection of the respiratory detection device.
[0083] In a possible implementation, the position sensor 240 further includes a pad layer 550 made of an elastic material. The pad layer 550 is disposed on the top side of the first flexible substrate 410, and the bottom side of the second flexible substrate 420 is connected to the pad layer 550.
[0084] Among them, the pad layer 550 can be an elastomer such as a rubber tape, a polyester tape, an acrylic tape, polyethylene terephthalate, a polyethylene foam, a thermoplastic elastomer, an acrylic foam, etc., to provide additional support and protection. One side of the pad layer 550 can be bonded to the top side of the first flexible substrate 410, and the other side of the pad layer 550 can be bonded to the bottom side of the second flexible substrate 420.
[0085] Specifically, the thickness of each position in the pad layer 550 is consistent, and the thickness of the pad layer 550 is greater than the sum of the thicknesses of the first conductive film 510 and the third conductive film 540.
[0086] It can be understood that since the cushion layer 550 is disposed on the top side of the first flexible substrate 410 and the bottom side of the second flexible substrate 420 is connected to the cushion layer 550, the first flexible substrate 410 and the second flexible substrate 420 are connected through the cushion layer 550. Since the thickness of each position in the cushion layer 550 is the same and the thickness of the cushion layer 550 is greater than the sum of the thicknesses of the first conductive film 510 and the third conductive film 540, when the position sensor 240 is not pressed, there is a gap between the first conductive film 510 and the third conductive film 540 under the isolation of the cushion layer 550, and there is also a gap between the strip-shaped resistance film 520 and the third conductive film 540, ensuring that each third conductive film 540 does not contact the first conductive film 510 and the strip-shaped resistance film 520. Moreover, since the cushion layer 550 is made of an elastic material, when the position sensor 240 is pressed, when an external force acts vertically on the first flexible substrate 410 or the second flexible substrate 420, the thickness of the cushion layer 550 will decrease, enabling some of the third conductive films 540 to contact the first conductive film 510 and the strip-shaped resistance film 520 simultaneously, reducing the equivalent resistance of the position sensor 240; after the pressure is released, the cushion layer 550 can quickly rebound, and the third conductive film 540 is made not to contact the first conductive film 510 and the strip-shaped resistance film 520 again.
[0087] In a possible implementation manner, referring again to Figures 4 to 7 , the number of the cushion layers 550 is two. The first conductive film 510 and the strip-shaped resistance film 520 are respectively located between the two cushion layers 550. The projections of each third conductive film 540 on the first flexible substrate 410 are respectively located between the projections of the two cushion layers 550 on the first flexible substrate 410, and the extension direction of the cushion layer 550 is the same as that of the first flexible substrate 410.
[0088] It can be understood that by providing two cushion layers 550, and defining that the first conductive film 510 and the strip-shaped resistance film 520 are respectively located between the two cushion layers 550, the projections of each third conductive film 540 on the first flexible substrate 410 are respectively located between the projections of the two cushion layers 550 on the first flexible substrate 410, and the extension direction of the cushion layer 550 is the same as that of the first flexible substrate 410, the first flexible substrate 410 and the second flexible substrate 420 can be effectively separated by the cushion layer 550, and it is ensured that when the positions where each third conductive film 540 is located are pressed, the third conductive film 540 can contact the first conductive film 510 and the strip-shaped resistance film 520 simultaneously.
[0089] In a possible implementation, when the pressure of the indenter 230 acts on the position sensor 240, the thickness of the cushion layer 550 decreases, causing the third conductive film 540 to contact both the strip-shaped resistance film 520 and the first conductive film 510 simultaneously, so as to determine the contact position when the indenter 230 contacts the position sensor 240 based on the resistance information of the position sensor 240.
[0090] It can be understood that since the cushion layer 550 is made of an elastic material, when the pressure of the indenter 230 acts on the position sensor 240, the thickness of the cushion layer 550 decreases, enabling part of the third conductive film 540 to contact the first conductive film 510 and the strip-shaped resistance film 520 simultaneously, reducing the equivalent resistance of the position sensor 240. Therefore, the resistance change rate of the position sensor 240 changes, that is, the resistance information of the position sensor 240 includes the resistance change rate. After the pressure is released, the cushion layer 550 can quickly rebound. For example, at the first second, the pressure of the indenter 230 acts on the position where the first third conductive film 540 is located, then the thickness of the cushion layer 550 at this position decreases. At the second second, the pressure of the indenter 230 acts on the position where the 10th third conductive film 540 is located, then the thickness of the cushion layer 550 at the position where the 10th third conductive film 540 is located decreases, and the thickness of the cushion layer 550 at the position where the first third conductive film 540 is located recovers, thereby improving the accuracy of detecting the breathing state of the breathing detection device.
[0091] Refer to Figure 12 , Figure 12 FIG. is an optional flowchart of the breathing detection method provided by the embodiment of the present application. This breathing detection method can be executed by a host computer, and this breathing detection method includes but is not limited to the following steps 1201 to step 1202.
[0092] Step 1201: Continuously collect the resistance information of the position sensor in the above-mentioned breathing detection device during the detection time period, where the resistance information is used to indicate the contact position when the indenter contacts the position sensor.
[0093] Step 1202: Construct a breathing signal curve for indicating the breathing state based on the resistance information and the acquisition time point of the resistance information.
[0094] Among them, the host computer can collect the resistance information of the position sensor. The resistance information can be the above-mentioned resistance change rate. Specifically, the host computer can be communicatively connected to the circuit module. The circuit module is provided with the above-mentioned resistance detection circuit, and the resistance detection circuit can detect the equivalent resistance of the position sensor.
[0095] Based on this, the structure of the breath detection device is simple, which can reduce the manufacturing difficulty. Since one end of the first belt body is detachably connected to one end of the second belt body, and the elastic belt body has elasticity, the detection belt can be fixed on the chest or abdomen of the object to be measured. Also, since the first sliding component is fixed on the first belt body, the second sliding component is slidably connected to the first sliding component, one end of the second sliding component away from the first sliding component is fixed on the second belt body, and the pressing head is arranged at one end of the second sliding component close to the first sliding component. When the object to be measured inhales, the elastic belt body stretches, thereby driving the second sliding component and the first sliding component to slide, and then driving the pressing head to slide on the surface of the position sensor, so that the contact position when the pressing head contacts the position sensor changes. Similarly, when the object to be measured exhales, the elastic belt body returns to its original state, thereby driving the second sliding component and the first sliding component to slide, and then driving the pressing head to slide on the surface of the position sensor, so that the contact position when the pressing head contacts the position sensor changes. Therefore, the change situation of the contact position can indicate the breathing state of the object to be measured. Specifically, during the detection time period, the resistance information of the position sensor in the above breath detection device is continuously collected. The resistance information at different acquisition time points can indicate the change situation of the contact position, realizing the accurate detection of the change situation of the contact position through the position sensor. Then, according to the resistance information and the acquisition time points of the resistance information, a breath signal curve for indicating the breathing state is constructed, which can improve the accuracy of breathing state detection.
[0096] Exemplarily, referring again to Figure 9 , on the coordinate system with the abscissa being time and the ordinate being the rate of change of resistance, a breath signal curve for indicating the breathing state can be constructed. The breath signal curve can show the change situation of the rate of change of resistance. In the time period from 0 second to 7.5 seconds, the frequency of the rate of change of resistance is moderate, representing that the object to be measured is in a normal breathing state; in the time period from 7.5 seconds to 38 seconds, the frequency of the rate of change of resistance is low, representing that the object to be measured is in a deep breathing state; in the time period from 38 seconds to 50 seconds, the frequency of the rate of change of resistance is high, representing that the object to be measured is in a rapid breathing state. Therefore, the breath signal curve can effectively indicate the breathing state of the object to be measured.
[0097] In addition, referring to Figure 13 , Figure 13 schematically shows the hardware structure of an electronic device in another embodiment. The electronic device includes:
[0098] The processor 1301 can be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;
[0099] The memory 1302 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc. The memory 1302 can store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1302 and are called by the processor 1301 to execute the breathing detection method in the embodiments of the present application;
[0100] The input / output interface 1303 is used to implement information input and output;
[0101] The communication interface 1304 is used to implement communication interaction between this device and other devices, and can achieve communication through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.);
[0102] The bus 1305 transmits information between various components of the device (such as the processor 1301, the memory 1302, the input / output interface 1303, and the communication interface 1304);
[0103] Among them, the processor 1301, the memory 1302, the input / output interface 1303, and the communication interface 1304 achieve communication connections with each other inside the device through the bus 1305.
[0104] The embodiments of the present application also provide a storage medium. The storage medium is a computer-readable storage medium for computer-readable storage. The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the above-mentioned breathing detection method.
[0105] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory optionally includes a memory remotely disposed relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
[0106] The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art will know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
[0107] Those skilled in the art can understand that Figure 12 the technical solutions presented do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than those illustrated, or combine certain steps, or different steps.
[0108] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0109] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and appropriate combinations thereof.
[0110] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.
[0111] It should be understood that in this application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single items (items) or plural items (items). For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.
[0112] In several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical or other forms.
[0113] The units described above as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0114] In addition, each functional unit in various embodiments of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.
[0115] When an integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of this application. The aforementioned storage medium includes: various media that can store programs, such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs.
[0116] The preferred embodiments of the embodiments of this application have been described above with reference to the accompanying drawings, and thus do not limit the scope of the rights of the embodiments of this application. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of this application shall be within the scope of the rights of the embodiments of this application.
Claims
1. A respiratory detection device, characterized in that, Comprising: A detection tape, including a first tape body, an elastic tape body, and a second tape body connected in sequence, wherein one end of the first tape body far from the elastic tape body is detachably connected to one end of the second tape body far from the elastic tape body; A detection module, including a first sliding component, a second sliding component, a pressing head, and a position sensor. The first sliding component is fixed on the first tape body, the position sensor is arranged on the first sliding component, the second sliding component is slidably connected to the first sliding component, one end of the second sliding component far from the first sliding component is fixed on the second tape body, the pressing head is arranged at one end of the second sliding component close to the first sliding component, the bottom surface of the pressing head contacts the surface of the position sensor, and the position sensor is used to detect the contact position when the pressing head contacts the position sensor.
2. The respiratory detection device according to claim 1, characterized in that, The second sliding component includes a first support portion, a connecting portion, and a second support portion connected in sequence. The first support portion is fixed on the second tape body, the second support portion is provided with a chute, the first sliding component is provided with a slider cooperating with the chute, and the first sliding component is located between the connecting portion and the detection tape.
3. The respiratory detection device according to claim 2, wherein, The second support portion is provided with a threaded through hole, the axis of the threaded through hole is perpendicular to the surface of the position sensor, the pressing head is provided with an external thread matching the threaded through hole, and the pressing head is threadedly connected to the threaded through hole.
4. The respiratory detection device according to claim 1, wherein The position sensor includes a first flexible substrate and a second flexible substrate. The first flexible substrate has a first end and a second end arranged oppositely. A first conductive film and a strip-shaped resistance film are arranged side by side and spaced apart on the top side of the first flexible substrate. The end portions of the first conductive film and the strip-shaped resistance film close to the first end are respectively connected to a resistance detection circuit, and the resistance detection circuit is used to detect the resistance value of the position sensor. The end portions of the first conductive film and the strip-shaped resistance film close to the second end are connected to each other through a second conductive film. The second flexible substrate is arranged at an interval above the first flexible substrate, the second flexible substrate is consistent with the extension direction of the first flexible substrate, and a plurality of third conductive films are arranged on the bottom side of the second flexible substrate, and each of the third conductive films is spaced apart along the extension direction of the second flexible substrate.
5. The respiratory detection device according to claim 4, wherein The resistance value of the position sensor and the contact distance of the position sensor satisfy the following relationship: Wherein, L is the contact distance, R is the resistance value of the position sensor, R0 is the resistance value of the strip-shaped resistance film, L0 is the length of the strip-shaped resistance film, and the contact distance is the distance between the contact position and the end portion of the strip-shaped resistance film close to the first end.
6. The breathing detection device according to claim 5, characterized in that The conductivity of the first conductive film, the second conductive film, and the third conductive film is greater than that of the strip-shaped resistive film. The resistance of the strip-shaped resistive film is evenly distributed. The first conductive film and the second conductive film are integrally formed. The extending direction of each third conductive film is perpendicular to the extending direction of the second flexible substrate. The bottom surface of the indenter matches the shape of the third conductive film.
7. The breathing detection device according to claim 4, characterized in that, The first conductive film, the second conductive film, and the third conductive film are all prepared from at least one of copper, silver, gold, or platinum. The strip-shaped resistive film is prepared from at least one of carbon nanotubes, graphene, carbon fiber, carbon-based composite cloth, tungsten oxide, zinc oxide, nickel oxide, molybdenum oxide, titanium oxide, or manganese oxide.
8. The respiratory detection device according to claim 4, characterized in that, The position sensor further includes a cushion layer made of an elastic material. The cushion layer is disposed on the top side of the first flexible substrate, and the bottom side of the second flexible substrate is connected to the cushion layer.
9. The breathing detection device according to claim 8, wherein When the pressure of the indenter acts on the position sensor, the thickness of the cushion layer decreases, causing the third conductive film to contact both the strip-shaped resistive film and the first conductive film simultaneously, so as to determine the contact position when the indenter contacts the position sensor through the resistance information of the position sensor.
10. A breathing detection method, characterized in that, Comprising: During a detection time period, continuously collect the resistance information of the position sensor in the breathing detection device according to any one of claims 1 to 9, wherein the resistance information is used to indicate the contact position when the indenter contacts the position sensor; Construct a breathing signal curve for indicating the breathing state according to the resistance information and the acquisition time point of the resistance information.