Detection module and electronic device

Abstract

The embodiment of the present application provides a detection module and electronic equipment. The detection module comprises a pressing member and a thin film sensor. The pressing member is used for pressing a measurement site. The thin film sensor is used for measuring a pulse wave signal of the measurement site, and the thin film sensor is arranged between the pressing member and the measurement site. The detection module and the electronic equipment provided by the embodiment of the present application can reduce the difficulty of miniaturization of the electronic equipment.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a detection module and an electronic device. Background Technology

[0002] Currently, smart bracelets, smartwatches, and other electronic devices integrate blood pressure measurement functions. These devices include an air pump, an air bladder, and a pressure sensor. The air pump inflates or deflates the air bladder, the pressure sensor measures the pressure inside the air bladder, and the air bladder surrounds and compresses the subject's artery. However, miniaturization of these electronic devices remains a challenge. Therefore, miniaturizing electronic devices has become an urgent problem to be solved. Summary of the Invention

[0003] This application provides a detection module and an electronic device that can reduce the difficulty of miniaturization.

[0004] The first aspect of this application provides a detection module, including a pressure-applying component and a thin-film sensor. The pressure-applying component is used to apply pressure to a measurement area. The thin-film sensor is used to measure the pulse wave signal of the measurement area, and the thin-film sensor is disposed between the pressure-applying component and the measurement area.

[0005] When the detection module provided in this application detects blood pressure, the pressure-applying component applies pressure to the measurement site of the subject, causing the blood vessels at the measurement site to be compressed to varying degrees, generating pulse wave signals of different shapes and amplitudes. Simultaneously, a thin-film sensor can measure the pulse wave signal within a region of the measurement site. Based on the collected pulse wave signal, the subject's blood pressure and / or heart rate can be calculated. Because a thin-film sensor is used to collect the pulse wave signal, signal acquisition can be decoupled from the pressure-applying component, thereby reducing the size constraints of the pressure-applying component and contributing to the miniaturization of the detection module. Furthermore, by collecting changes in the pulse wave signal through a thin-film sensor, the detection module measures the pulse wave signal using a mechanical method, unaffected by factors such as ambient light, skin color, and sweat, thus improving detection accuracy. In addition, the thin-film sensor collects pulse wave signals from a region on the measurement site, avoiding the inaccuracy caused by positional deviation in single-point measurement. It also avoids the problems of large data scale, high hardware complexity, hardware computing power and algorithm requirements caused by using a pressure sensor array to collect pulse wave signals from a region. Furthermore, it eliminates the need to consider the consistency issues of multiple sensing units, thus ensuring higher measurement efficiency and more accurate results.

[0006] In one possible implementation, the detection module further includes a thin-film component, wherein: the thin-film component is disposed between the pressure member and the thin-film sensor. Alternatively, the thin-film sensor is disposed between the thin-film component and the pressure member. Alternatively, the thin-film component includes a first portion and a second portion, the first portion being disposed between the pressure member and the thin-film sensor, and the thin-film sensor being disposed between the first portion and the second portion.

[0007] The detection module provided in this application embodiment can reduce the sensitivity of the thin-film sensor by setting a thin-film component, avoid the output signal of the thin-film sensor caused by small changes in the measurement part, and reduce the probability of the thin-film sensor malfunctioning unexpectedly.

[0008] In one possible implementation, the detection module further includes a package, with the thin-film sensor disposed between the package and the pressure member and shielded by the package.

[0009] The detection module provided in this application embodiment, by placing the thin-film sensor between the pressure component and the encapsulation component and shielding it by the encapsulation component, can prevent the thin-film sensor from being worn and can also isolate it from the corrosion of oil, sweat, water vapor and oxygen, thereby improving the service life of the thin-film sensor.

[0010] In one possible implementation, the pressurizing element includes a pressurizing airbag, and a thin-film sensor is disposed between the measuring area and the pressurizing airbag.

[0011] The detection module provided in this application inflates or deflates a pressure bladder, causing it to expand or contract, to apply pressure, depressurize, or maintain a fixed pressure on the measurement site. This ensures that the pulse wave signal at the measurement site changes, allowing the thin-film sensor to collect the pulse wave signal. Furthermore, because the pulse wave signal is collected by a thin-film sensor, the size constraints on the pressure bladder are reduced; the pressure bladder can be designed to be narrower and shorter, contributing to a reduction in the size of the detection module.

[0012] In one possible implementation, the detection module further includes a restraint member for defining an annular structure surrounding the measurement site, and a pressure member disposed between the restraint member and the thin-film sensor.

[0013] The detection module provided in this application embodiment places the pressure-applying component in front of the restraint component and the thin-film sensor, so that the pressure-applying component can apply pressure to the measurement site, ensuring that the blood vessels in the measurement site generate pulse wave signals due to compression.

[0014] In one possible implementation, the detection module further includes a pressure sensor for detecting the pressure inside the inflatable airbag.

[0015] The detection module provided in this embodiment detects the pressure inside the inflatable bladder using a pressure sensor. It can obtain blood pressure or heart rate based on pressure changes within the bladder, thereby correcting for blood pressure or heart rate obtained from pulse wave signals collected by a thin-film sensor, and further improving measurement accuracy. Additionally, even when the thin-film sensor cannot measure static force, the inflatable bladder can apply pressure to the measurement site with a fixed pressure to achieve heart rate measurement.

[0016] In one possible implementation, the pressure member includes a dial fastener and a restraint member. The first end of the restraint member is fixedly connected to the dial fastener, and the second end of the restraint member is drively connected to the dial fastener. The dial fastener and the restraint member are used to form an annular structure that surrounds the measuring part and has a variable inner diameter. The thin film sensor is disposed between the restraint member and the measuring part.

[0017] The detection module provided in this application uses a pressure-applying component consisting of a buckle and a restraint member to apply pressure to the measurement area, which simplifies the structural design of the detection module, eliminating the need for components such as an air pump and air pressure sensor. Furthermore, by removing the air bladder, the thickness of the pressure-applying component can be reduced. In addition, the inner diameter of the annular structure defined by the pressure-applying component is variable, giving the detection module an automatic tightening function. The measurement results are unaffected by the user's initial wearing tightness, avoiding measurement errors caused by wearing it too loosely or too tightly.

[0018] In one possible implementation, the thin-film sensor has a strip-shaped structure, and the length direction of the thin-film sensor is parallel to the length direction of the pressure member.

[0019] The detection module provided in this application ensures that the thin-film sensor is always aligned with the artery at the measurement site by aligning its length direction with that of the pressure-applying component, thereby acquiring pulse wave signals. Furthermore, it can adapt to different measurement sites for different subjects, improving the versatility of the detection module.

[0020] In one possible implementation, the thin-film sensor is one of the following: a piezoelectric thin-film sensor, a piezoresistive thin-film sensor, a piezoresistive thin-film sensor, an ion-electron thin-film sensor, or a triboelectric thin-film sensor. By employing these types of thin-film sensors, pulse wave signals can be acquired.

[0021] In one possible implementation, the thin-film sensor includes a first electrode layer, a sensing layer, and a second electrode layer stacked together, wherein one of the first electrode layer and the second electrode layer is disposed between the pressure member and the sensing layer, and the other is disposed between the sensing layer and the measurement part.

[0022] In the detection module provided in this application embodiment, one of the first electrode layer and the second electrode layer of the thin-film sensor is disposed between the pressure member and the sensing layer, and the other is disposed between the sensing layer and the measurement site, which can ensure that the pulse wave signal is acquired when the blood vessel at the measurement site generates a pulse wave signal.

[0023] A second aspect of this application provides an electronic device including a detection module as described in any of the first aspects.

[0024] The electronic device provided in this application reduces the difficulty of miniaturization by employing the detection module of the first aspect, thus enabling the miniaturization of the electronic device. Furthermore, since the detection module acquires pulse wave signals through a thin-film sensor, the accuracy of heart rate detection by the electronic device can be improved. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a first type of electronic device provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 The diagram shows the structural block diagram of the electronic device.

[0027] Figure 3 for Figure 1 A cross-sectional view of the thin-film sensor and the pressure device in action;

[0028] Figure 4 This is a schematic diagram of the structure of a second electronic device provided in an embodiment of this application;

[0029] Figure 5 for Figure 4 A cross-sectional view of the electronic equipment in the diagram;

[0030] Figure 6 A partial cross-sectional view of a third electronic device provided in an embodiment of this application;

[0031] Figure 7 A partial cross-sectional view of a fourth electronic device provided in an embodiment of this application;

[0032] Figure 8 A partial cross-sectional view of the fifth electronic device provided in the embodiments of this application;

[0033] Figure 9 This is a schematic diagram of the structure of the sixth electronic device provided in the embodiments of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Pressure components;

[0036] 20. Thin-film sensor; 21. First electrode layer; 22. Sensing layer; 23. Second electrode layer;

[0037] 30. Restraint component; 31. Watch body; 32. First watch strap; 33. Second watch strap;

[0038] 40. Connecting wire;

[0039] 50. Barometric pressure sensor;

[0040] 60. Watch fasteners;

[0041] 70. Thin film components;

[0042] 80. Packaging components;

[0043] 81. Controller; 82. Air pump; 83. Exhaust valve. Detailed Implementation

[0044] Currently, smart bracelets, smartwatches, and wristwatch-style blood pressure monitors integrate functions such as blood pressure and heart rate measurement. These devices typically include an air pump, an air bladder, and a pressure sensor. The air pump inflates or deflates the air bladder, and the pressure sensor measures the pressure inside the bladder. By inflating the air bladder and compressing the arteries in the wrist, the amplitude of the blood vessel's pulsation changes with the external pressure, which in turn affects the internal pressure of the air bladder. During the entire air bladder inflation process, the pressure sensor detects a pulse wave oscillation envelope signal that initially increases and then decreases; this envelope signal is used to determine blood pressure. Additionally, the electronic device uses photoplethysmography (PPG) to measure heart rate. PPG is a method that shines light into the skin and measures the light scattering caused by blood flow. The method is based on the following working principle: when hemodynamic parameters, such as pulse rate (heart rate) or blood volume (cardiac output), change, the light entering the human body will be predictably scattered. These scattered light are received by a photosensitive sensor and converted into electrical signals. By analyzing the periodicity of the obtained electrical signals, the heart rate data of the subject can be obtained.

[0045] However, to obtain a complete pulse wave oscillation envelope signal, the airbag needs to provide a sufficient effective compression area when inflated, resulting in a larger airbag width and a larger electronic device size, making miniaturization difficult. In addition, the airbag needs to compress the radial and ulnar arteries in the wrist, which has a large upper limit for pressure, and it is difficult to cover all wrist circumferences with a single standard-sized airbag. Therefore, multiple airbags are required, increasing costs.

[0046] In addition, since PPG measurements are based on optical principles, any factor affecting the intensity of scattered light can cause measurement errors. For example, dark skin has a higher light absorption rate, resulting in less scattered light received by the photosensor and thus a larger error. Also, when worn loosely, the gap between the wrist and the PPG module is larger, allowing more ambient light to enter and superimpose on the scattered light signal, causing interference. Furthermore, movement causing displacement of the sensor on the wrist can also deviate the scattered light signal, resulting in measurement errors.

[0047] In view of this, embodiments of this application provide a detection module and an electronic device, which can reduce the difficulty of miniaturizing electronic devices. Furthermore, it can improve the accuracy of measuring heart rate and / or blood pressure. In addition, it can reduce the computing power requirements of the electronic device, thereby improving its feasibility.

[0048] The implementation of the detection module and electronic device provided in the embodiments of this application will be described below.

[0049] Figure 1 A schematic diagram of the structure of a first electronic device provided in an embodiment of this application. See also... Figure 1 As shown, the electronic device in this application embodiment includes a detection module for detecting the blood pressure and / or heart rate of the subject.

[0050] The electronic devices provided in this application embodiment may include, but are not limited to, smart bracelets, smartwatches, watches, watch-style blood pressure monitors, or blood pressure meters. In this application embodiment, a smartwatch is used as an example of the aforementioned electronic device for illustration.

[0051] See also Figure 1 As shown, the detection module includes a pressure-applying component 10 and a thin-film sensor 20. The pressure-applying component 10 applies pressure to the measurement area (not shown) of the subject. The thin-film sensor 20 measures the pulse wave signal at the measurement area and is positioned between the pressure-applying component 10 and the measurement area.

[0052] The thin-film sensor 20 refers to a flexible sheet sensor with a thickness less than a preset thickness. For example, in this embodiment, the thin-film sensor 20 is a flexible sheet sensor with a thickness less than 0.5 mm.

[0053] Combination Figure 1As shown, during the measurement process of the electronic device on the subject's measurement site, the pressure-applying component 10 applies pressure to the measurement site, causing the blood vessels at the measurement site to be compressed to varying degrees, generating pulse wave signals of different shapes and amplitudes. Simultaneously, the thin-film sensor 20 can measure the pulse wave signal within a region of the measurement site. Based on the collected pulse wave signal, the subject's blood pressure and / or heart rate can be calculated. Specifically, by applying multiple different pressure values ​​to the measurement site using the pressure-applying component 10, the envelope of the pulse wave signal changes, and the blood pressure value can be calculated based on the changes in the envelope. Alternatively, by applying a fixed pressure to the measurement site using the pressure-applying component 10, the frequency of the pulse wave signal is statistically analyzed, and the heart rate value can be calculated based on the frequency of the pulse wave signal.

[0054] In this embodiment, the pulse wave signal of the measurement site is collected by the thin film sensor 20, and the pressure applied to the measurement site is provided by the pressure member 10. This decouples the pressure member 10 from the collection of the pulse wave signal, thus reducing the size constraints on the pressure member 10. The pressure member 10 can be designed to be narrower and shorter, thereby reducing the volume of the pressure member 10 and thus contributing to the miniaturization of the detection module.

[0055] In this embodiment, a fixed pressure is applied to the measurement site by the pressure member 10, and the frequency of the pulse wave signal is collected by the thin-film sensor 20, so that the detection module measures the pulse wave signal by a mechanical method. Compared with the photoplethysmography method for measuring heart rate in related technologies, the detection module provided in this embodiment is not affected by factors such as ambient light, skin color, and sweat when measuring heart rate, which can improve the accuracy of detection.

[0056] In this embodiment, the pulse wave signal of a region on the measurement site is collected by the thin-film sensor 20, avoiding the measurement inaccuracy caused by positional deviation in single-point measurement. In addition, it can also avoid the problems of large data scale, high hardware complexity, hardware computing power and algorithm requirements caused by using a pressure sensor array to collect pulse wave signals of a region. It can even eliminate the need to consider the consistency of multiple sensing units, thus ensuring higher measurement efficiency and more accurate results.

[0057] See also Figure 1 As shown, along the length direction of the pressure member 10 (e.g.) Figure 1 In the Y direction, the length of the thin film sensor 20 is less than the length of the pressure member 10. Of course, the length of the thin film sensor 20 can also be equal to the length of the pressure member 10.

[0058] It should be noted that during the measurement process, the pressure-applying element 10 covers the two arteries at the measurement site. The pressure-applying element 10 causes the two arteries to vibrate, which in turn causes the skin at the measurement site to vibrate, generating multiple signal sources. At least one of these signal sources may be a clutter signal that interferes with the measurement of the thin-film sensor 20. Therefore, if the length of the thin-film sensor 20 is too long, it may be subject to interference from clutter signals, which will reduce the measurement effect of the thin-film sensor 20. Of course, if the length of the thin-film sensor 20 is too short, it may not be able to cover the arteries, and the pulse wave signal may not be measured.

[0059] In some embodiments, see continue to see Figure 1 As shown, the thin-film sensor 20 can be connected to the outer surface of the pressure member 10. This not only fixes the thin-film sensor 20 to the pressure member 10 but also allows it to be positioned between the pressure member 10 and the measuring part. The thin-film sensor 20 can be connected to the surface of the pressure member 10 by means of bonding, hot pressing, or other methods.

[0060] In this embodiment, the type of thin-film sensor 20 may include, but is not limited to, piezoelectric thin-film sensors, piezoresistive thin-film sensors, piezocapacitive thin-film sensors, ion-electronic thin-film sensors, or triboelectric thin-film sensors. Specifically, for piezoelectric thin-film sensors, the sensing material may include inorganic piezoelectric materials such as aluminum nitride, zinc oxide, and lead zirconate titanate, and organic piezoelectric materials such as polyvinylidene fluoride. For piezoresistive thin-film sensors, the sensing material may include carbon black, carbon nanotubes, etc. For piezocapacitive thin-film sensors, the sensing material may include elastic materials such as polydimethylsiloxane, Ecoflex, and hydrogenated styrene-butadiene block copolymer. For ion-electronic thin-film sensors, the sensing material may include ionic liquids and ion gels, etc. For triboelectric thin-film sensors, the sensing material may include polyethylene terephthalate and polytetrafluoroethylene, etc.

[0061] In some possible implementations, combining Figure 1 As shown, the thin-film sensor 20 can be a strip-shaped structure, with its length parallel to the length of the pressure member 10. This configuration ensures that the thin-film sensor 20 is always aligned with the artery at the measurement site, guaranteeing the acquisition of pulse wave signals and reducing its length, thus lowering its cost. Furthermore, it can adapt to different measurement sites for different subjects, improving the versatility of the detection module.

[0062] The specific shape of the thin-film sensor 20 is not limited here. For example, the thin-film sensor 20 may be rectangular.

[0063] It should be noted that the thin-film sensor 20 can be in the form of a strip, or it can also be in the form of a circle, a square, etc.

[0064] In some possible implementations, combining Figure 1 As shown, the pressurizing component 10 includes a pressurizing airbag. A thin-film sensor 20 is positioned between the measuring area and the pressurizing airbag, which has a strip-shaped structure. During measurement, the pressurizing airbag covers the artery at the measuring area. By inflating or deflating the airbag, it expands or contracts, applying pressure, depressurizing, or maintaining a fixed pressure at the measuring area to ensure changes in the pulse wave signal at the measuring area. Simultaneously, the thin-film sensor 20 can acquire the pulse wave signal.

[0065] Correspondingly, since the pulse wave signal is acquired by the thin-film sensor 20 and the pressure airbag is used to apply pressure to the measurement site, the acquisition of the pulse wave signal by the pressure airbag is decoupled. Therefore, the size constraint of the pressure airbag is reduced, and the pressure airbag can be designed to be narrower and shorter, which helps to reduce the volume of the detection module.

[0066] There are no restrictions on the specific materials used for the inflatable airbag. Materials for the inflatable airbag may include polymers such as thermoplastic polyurethane elastomers, thermoplastic elastomers, polyurethane, and nitrile rubber.

[0067] The pressurized airbag can be a single-layer structure or a multi-layer structure; there are no restrictions here.

[0068] The pressurized airbag has a closed internal structure. It can be connected to the outside via one or more air nozzles (not shown in the figure), allowing external gas to enter and exit the airbag, thus inflating and contracting it. No restrictions are placed on how gas enters and exits the airbag.

[0069] In some possible implementations, combining the above Figure 1 As shown, the detection module may also include a restraint member 30. The restraint member 30 defines a ring-shaped structure surrounding the measurement area, and the pressure member 10 is disposed between the restraint member 30 and the thin-film sensor 20. This arrangement allows the pressure member 10 to apply pressure to the measurement area, ensuring that the blood vessels at the measurement area generate pulse wave signals due to compression.

[0070] Understandably, in combination Figure 1As can be seen, the pressure member 10 has a strip-shaped structure and is a pressure airbag. Since the pressure airbag cannot surround the measuring area, it cannot apply pressure to the measuring area. Therefore, in this embodiment, by placing the pressure member 10 between the thin-film sensor 20 and the restraint member 30, the pressure member 10 can apply pressure to the measuring area during the measurement process, thereby ensuring that the thin-film sensor 20 can measure the pulse wave signal.

[0071] The specific structure of the restraint member 30 is not limited here. As long as it meets the requirement that the pressure member 10 can apply pressure to the measuring part, it is acceptable.

[0072] For example, see [link to previous article] Figure 1 As shown, the restraint member 30 may include a watch body 31, a first watch strap 32, and a second watch strap 33. The first end of the first watch strap 32 and the first end of the second watch strap 33 are respectively connected to opposite ends of the watch body 31, and the second end of the first watch strap 32 and the second end of the second watch strap 33 are detachably connected. A pressure member 10 is disposed on the inner side of one of the first watch strap 32 and the second watch strap 33, for example... Figure 1 As shown, the pressure member 10 is disposed on the inner side of the first strap 32, such that the pressure member 10 is positioned between the first strap 32 and the measuring part. During the measurement process, the second end of the first strap 32 and the second end of the second strap 33 are connected, so that the restraint member 30 forms a ring structure surrounding the measuring part, thereby the pressure member 10 is positioned between the restraint member 30 and the measuring part, and thus the pressure member 10 can apply pressure to the measuring part.

[0073] See also Figure 1 As shown, the length of the pressure member 10 is equal to the length of the first watch strap 32; however, the length of the pressure member 10 may also be less than the length of the first watch strap 32.

[0074] In some embodiments, the width of the pressure member 10 is equal to the width of the first watch strap 32. Of course, the width of the pressure member 10 may also be less than the width of the first watch strap 32.

[0075] In this embodiment, the specific structure of the watch body 31 is not limited. Exemplarily, the watch body 21 may include a housing and a display panel. The first end of the first strap 32 and the first end of the second strap 33 are respectively connected to the opposite ends of the housing. The display panel is used to display information to be displayed, such as text, images, etc.

[0076] It should be noted that the restraint member 30 can be constructed not only by the watch body 31, the first watch strap 32, and the second watch strap 33, but also by other structures. For example, the restraint member 30 is a strip-shaped piece (not shown in the figure), with the pressure member 10 disposed on the inner side of the strip, and the strip is used to form an annular structure surrounding the measuring part. Alternatively, in some embodiments, the restraint member 30 is an annular piece (not shown in the figure), with the pressure member 10 disposed on the inner side of the annular piece and between the annular piece and the measuring part.

[0077] Figure 2 for Figure 1 The diagram shows the structural block diagram of the electronic device. See also the following for some possible implementations. Figure 2 As shown, the electronic device may also include an air pump 82 and an exhaust valve 83. The pressurized airbag can be connected to the air pump 82 and the exhaust valve 83 respectively via two air nozzles, with the exhaust valve 83 connected to the air pump. Through the cooperation of the air pump 82 and the exhaust valve 83, the pressurized airbag can be inflated or deflated, allowing it to expand and contract to meet the needs of applying or releasing pressure to the measurement site.

[0078] In some embodiments, the air pump 82 and the exhaust valve 83 may be located inside the body 31 (not shown in the figure), which can improve the integration of the electronic device.

[0079] See also the following for some possible implementations. Figure 2 As shown, the electronic device may also include a controller 81, which is electrically connected to the thin-film sensor 20, the air pump 82, and the exhaust valve 83. The controller 81 can be used to control the air pump 82 and the exhaust valve 83 to inflate or deflate the pressurized airbag. In addition, the controller 81 can also calculate blood pressure and / or heart rate based on the pulse wave signal collected by the thin-film sensor 20.

[0080] In some embodiments, the controller 81 may be located inside the body 31 (not shown in the figure), which can improve the integration of the electronic device.

[0081] See also the following for some possible implementations. Figure 2 As shown, the detection module may also include a pressure sensor 50, which is used to detect the pressure inside the inflatable bladder. Accordingly, by detecting the pressure inside the inflatable bladder using the pressure sensor 50, blood pressure or heart rate can be obtained based on the pressure changes within the inflatable bladder. This allows for correction of the blood pressure or heart rate obtained from the pulse wave signal collected by the thin-film sensor 20, thereby further improving measurement accuracy. Additionally, even when the thin-film sensor 20 cannot measure static force, the inflatable bladder can apply pressure to the measurement site with a fixed pressure to achieve heart rate measurement.

[0082] Understandably, when the thin-film sensor 20 can only detect dynamic force, without the pressure sensor 50, the pressure collected by the thin-film sensor 20 would be zero when the inflatable airbag applies a fixed pressure to the measurement site. This would prevent the measurement of the pulse wave signal frequency under fixed pressure, and thus, the measurement of heart rate. Therefore, when the thin-film sensor 20 cannot measure static force, the pressure sensor 50 detects the pressure inside the inflatable airbag, ensuring that the inflatable airbag can apply a fixed pressure to the measurement site, thus enabling heart rate detection.

[0083] The specific installation location of the pressure sensor 50 is not limited here. In one embodiment, the pressure sensor 50 may be disposed inside the pressurized airbag (not shown in the figure). Alternatively, in another embodiment, the pressure sensor 50 may also be disposed inside the gauge body 31 (not shown in the figure).

[0084] Figure 3 for Figure 1 A cross-sectional view of the thin-film sensor assembling with a pressure-applying element. In some possible implementations, the thin-film sensor 20 may include a first electrode layer 21, a sensing layer 22, and a second electrode layer 23 stacked together. One of the first electrode layer 21 and the second electrode layer 23 is disposed between the pressure-applying element 10 and the sensing layer 22, and the other is disposed between the sensing layer 22 and the measurement area, for example... Figure 3 As shown, the first electrode layer 21 is disposed between the pressure member 10 and the sensing layer 22, and the second electrode layer 23 is disposed between the sensing layer 22 and the measuring part.

[0085] During the process of the pressure-applying element 10 applying pressure to the measurement site, the second electrode layer 23 is used to closely contact the skin of the measurement site. When the sensing layer 22 is subjected to external pressure, the distribution of charged particles within the material changes, such as electrons and ions. This change is transmitted from the electrode layer and generates a change in electrical signal. The pressure value is measured by the thin-film sensor 20 through a one-to-one mapping between the electrical signal and the external pressure value. In this embodiment, the external pressure value can be understood as the pressure exerted by the blood vessel on the thin-film sensor 20 under the pressure applied by the pressure-applying element 10.

[0086] In some embodiments, see continue to see Figure 3 As shown, along the thickness direction of the thin-film sensor 20 (e.g.) Figure 3 In the X direction, the thickness of the pressure member 10 is equal to the thickness of the thin film sensor 20. Of course, the thickness of the pressure member 10 can also be greater than or less than the thickness of the thin film sensor 20 (not shown in the figure).

[0087] In some embodiments, see continue to see Figure 3As shown, the first electrode layer 21 and the second electrode layer 23 have the same thickness along the thickness direction of the thin-film sensor 20, and the thickness of either the first electrode layer 21 or the second electrode layer 23 is equal to half the thickness of the sensing layer 22. This configuration reduces the thickness of the thin-film sensor 20, which helps to miniaturize the detection module.

[0088] The detection module may also include a connecting cable 40. Combined with the above... Figure 2 As shown, and continue to participate Figure 4 and Figure 5 As shown, one end of the connecting line 40 is electrically connected to the thin-film sensor 20, and the other end of the connecting line 40 is used to electrically connect to the controller 81 of the electronic device. The connecting line 40 can transmit the pulse wave signal collected by the thin-film sensor 20 to the controller 81.

[0089] The connecting wire 40 can be electrically connected to at least one of the thin-film sensor 20 and the controller 81 by means of plugging, soldering, or bonding with conductive adhesive.

[0090] The specific type of the connecting wire 40 is not limited here. The type of connecting wire 40 may include, but is not limited to, enameled wire, rubber-insulated wire, and flexible printed circuit (FPC) cable. Furthermore, the conductor material of the connecting wire 40 may include, but is not limited to, gold, silver, copper, aluminum, graphite, and silver nanowires.

[0091] See also Figure 4 and Figure 5 As shown, the connecting line 40 is located on the outside of the pressure member 10. Of course, the connecting line 40 can also be located inside the pressure member 10 (not shown in the figure).

[0092] See also Figure 4 and Figure 5 As shown, the connecting wire 40 is connected to the pressure member 10. Of course, the connecting wire 40 can also be arranged on the outside of the pressure member 10 in the form of a flying wire. In other words, the connecting wire 40 can be connected to the pressure member 10 or not.

[0093] There are no restrictions on how the connecting line 40 is connected to the pressure member 10. For example, the connecting line 40 can be connected to the pressure member 10 by surface bonding, deposition, or other methods.

[0094] In some possible implementations, combining the above Figure 4 and Figure 5As shown, the detection module may also include a package 80, with the thin-film sensor 20 disposed between the package 80 and the pressure member 10 and shielded by the package 80. This arrangement can prevent the thin-film sensor 20 from being worn and can also isolate it from the corrosion of oil, sweat, moisture, and oxygen, thereby improving the service life of the thin-film sensor 20.

[0095] The encapsulation component 80 can be attached to the surface of the pressure component 10 by means of bonding or hot pressing to cover the thin film sensor 20.

[0096] The material of the encapsulation component 80 may include, but is not limited to, dense insulating materials such as thermoplastic polyurethane elastomer, thermoplastic elastomer, polyurethane (PU), nitrile rubber, and polytetrafluoroethylene.

[0097] See also Figure 4 and Figure 5 As shown, since the connecting line 40 is located on the outside of the pressure member 10, the encapsulation member 80 also covers a portion of the connecting line 40. Of course, when the connecting line 40 is located inside the pressure member 10, the encapsulation member 80 will not cover the connecting line 40 (not shown in the figure).

[0098] See also Figure 4 and Figure 5 As shown, the area of ​​the package 80 is larger than the area of ​​the thin-film sensor 20, but smaller than the area of ​​the pressure member 10. In other words, the package 80 not only covers the entire thin-film sensor 20, but also a portion of the pressure member 10. Of course, in some embodiments, the package 80 may also cover the entire surface of the pressure member 10, for example... Figure 6 As shown, Figure 6 This is a partial cross-sectional view of a third electronic device provided in an embodiment of this application. Alternatively, in some embodiments, the package 80 may only cover the surface of the thin-film sensor 20 (not shown in the figure).

[0099] Figure 7 This is a partial cross-sectional view of a fourth electronic device provided in an embodiment of this application. Figure 7 and Figure 5 The difference lies in that the detection module may also include a thin film component 70, which is disposed between the pressure component 10 and the thin film sensor 20. This arrangement can reduce the sensitivity of the thin film sensor 20, avoid the output signal of the thin film sensor 20 due to small changes in the measurement area, and reduce the probability of the thin film sensor 20 malfunctioning unexpectedly.

[0100] Because the measurement site exhibits natural fluctuations, such as the involuntary vibration of the skin on the wrist, this vibration can also cause the thin-film sensor 20 to output a signal. However, this signal is meaningless, therefore, the sensitivity of the thin-film sensor 20 needs to be controlled within a certain range. If the sensitivity of the thin-film sensor 20 is too high, it will output a signal due to the natural fluctuations of the measurement site. If the sensitivity of the thin-film sensor 20 is too low, it will affect the accuracy of the measurement. Therefore, by reducing the sensitivity of the thin-film sensor 20 using the thin-film component 70, the sensitivity of the thin-film sensor 20 can be controlled within a certain range.

[0101] In the embodiments of this application, the material of the film component 70 may include, but is not limited to, polyethylene naphthalate, polyethylene terephthalate, etc.

[0102] In this embodiment, the specific thickness of the thin film 70 is not limited; for example, the thickness of the thin film 70 can be 100 μm. The greater the thickness of the thin film 70, the greater the decrease in sensitivity of the thin film sensor 20.

[0103] See also Figure 7 As shown, the area of ​​the thin film component 70 is larger than the area of ​​the thin film sensor 20; in other words, along the thickness direction of the thin film sensor 20 (e.g., ...). Figure 7 In the X direction, the projection of the thin film component 70 covers the projection of the thin film sensor 20. Of course, the area of ​​the thin film component 70 can also be equal to the area of ​​the thin film sensor 20 (not shown in the figure). Therefore, having an area of ​​the thin film component 70 greater than or equal to the area of ​​the thin film sensor 20 can prevent the thin film sensor 20 from being affected by bending of the thin film component 70, and also prevent a reduction in the sensitivity of the thin film sensor 20.

[0104] See also Figure 7 As shown, the package 80 covers both the thin-film sensor 20 and the thin-film component 70. In other words, the package 80 simultaneously shields both the thin-film component 70 and the thin-film sensor 20. Of course, the package 80 can also shield a portion of the thin-film component 70 (not shown in the figure) while covering the thin-film sensor 20.

[0105] It should be noted that, since the thin-film sensor 20 is a flexible sheet sensor with a thickness of less than 0.5 mm, it is best to use it with a rigid object, that is, to use an object with a hardness greater than that of the thin-film sensor 20. In conjunction with the above... Figure 1It is known that the two sides of the thin-film sensor 20 are the pressure airbag and the skin of the measurement site, respectively. Since the hardness of the pressure airbag and the skin of the measurement site is less than that of the thin-film sensor 20, they will generate noise signals that interfere with the thin-film sensor 20 and / or cause the output signal of the thin-film sensor 20 to be unstable. Therefore, if the thin-film sensor 20 is used with a soft object, the measurement effect will be reduced. Thus, having at least one side of the thin-film sensor 20 with an object harder than the thin-film sensor 20 can reduce the sensitivity of the thin-film sensor 20 and improve the measurement effect.

[0106] In summary, besides placing the thin film component 70 between the thin film sensor 20 and the pressure component 10, the sensitivity of the thin film sensor 20 is controlled within a certain range. Figure 8 A partial cross-sectional view of a fifth electronic device provided in an embodiment of this application. In some embodiments, such as Figure 8 As shown, the thin-film sensor 20 can also be disposed between the pressure member 10 and the thin-film member 70, and the sensitivity of the thin-film sensor 20 can also be controlled within a certain range.

[0107] Alternatively, in some embodiments, the thin film component 70 may also include a first portion and a second portion (not shown in the figure), with the first portion disposed between the pressure member 10 and the thin film sensor 20, and the thin film sensor 20 disposed between the first portion and the second portion. The sensitivity of the thin film sensor 20 may also be controlled within a certain range. The thicknesses of the first portion and the second portion may be equal, or the thickness of the first portion may be greater than the thickness of the second portion, or the thickness of the first portion may be less than the thickness of the second portion.

[0108] Of course, besides reducing the sensitivity of the thin-film sensor 20 by using the thin-film component 70, the thin-film component 70 can also be removed if there is something with a hardness greater than that of the thin-film sensor 20 on one side of it. For example, if the hardness of the pressurized airbag is greater than that of the thin-film sensor 20, the thin-film component 70 can be removed while reducing the sensitivity of the thin-film sensor 20 by using the pressurized airbag. Alternatively, in some embodiments, if the hardness of the encapsulation component 80 is greater than that of the thin-film sensor 20, the thin-film component 70 can be removed while reducing the hardness of the thin-film sensor 20 by using the encapsulation component 80.

[0109] In the above description, pressure is applied to the measurement site through the cooperation of the pressure airbag and the restraint member 30. Alternatively, the restraint member can be removed, allowing the pressure member 10 to still apply pressure to the measurement site. In some possible implementations, the pressure member 10 may also include a pressure airbag and a variable diameter structure (not shown in the figure). The pressure airbag has a ring-shaped structure, and the variable diameter structure is used to change the outer diameter of the pressure airbag, allowing it to be fitted to different subjects.

[0110] Alternatively, in some possible implementations, the pressurizing element 10 may also include a first structure (not shown), a second structure (not shown), and a strip-shaped pressurizing airbag (not shown). The first and second structures are respectively disposed at opposite ends of the pressurizing airbag and are detachably connected. During measurement, the first and second structures are connected, causing the pressurizing airbag to form a ring structure surrounding the measurement site. The thin-film sensor 20 is then positioned between the pressurizing airbag and the measurement site, allowing the thin-film sensor 20 to acquire pulse wave signals.

[0111] The first structure can be detachably connected to the second structure by means of bonding, snap-fitting, etc.

[0112] Figure 9 This is a schematic diagram of the structure of the sixth electronic device provided in the embodiments of this application. Figure 9 and Figure 1 The difference is that the pressure member 10 includes a fastener 60 and a restraint member 30. The first end of the restraint member 30 is fixedly connected to the fastener 60, and the second end of the restraint member 30 is drivenly connected to the fastener 60. The fastener 60 and the restraint member 30 are used to form an annular structure that surrounds the measuring part and has a variable inner diameter. The thin film sensor 20 is disposed between the restraint member 30 and the measuring part.

[0113] Correspondingly, the pressure-applying component 10, composed of the buckle 60 and the restraint component 30, applies pressure to the measuring area, simplifying the structural design of the detection module. For example, it eliminates the need for components such as the air pump 82 and the air pressure sensor 50. Furthermore, by removing the air bladder, the thickness of the pressure-applying component 10 can be reduced. In addition, the variable inner diameter of the annular structure defined by the pressure-applying component 10 allows the detection module to have an automatic tightening function, ensuring that the measurement results are not affected by the user's initial wearing tightness, thus avoiding measurement errors caused by wearing it too loosely or too tightly.

[0114] See also Figure 9 As shown, the restraint member 30 includes a watch body 31, a first watch strap 32, and a second watch strap 33. The first ends of the first watch strap 32 and the second watch strap 33 are respectively connected to opposite ends of the watch body 31. The second ends of the first watch strap 32 and the second watch strap 33 are respectively connected to the watch buckle 60. A thin-film sensor 20 is disposed inside one of the first watch strap 32 and the second watch strap 33, for example... Figure 9 As shown, the thin-film sensor 20 is disposed on the inner side of the first watch band 32. Of course, the thin-film sensor 20 can also be disposed on the inner side of the second watch band 33 (not shown in the figure).

[0115] At least one of the first watch strap 32 and the second watch strap 33 can be connected to the watch body 31 by means of adhesive, heat fusion, buckle, etc.

[0116] The specific materials of the first watch band 32 and the second watch band 33 are not limited here. Exemplarily, the material of at least one of the first watch band 32 and the second watch band 33 may include, but is not limited to, polymers or hydrated materials such as fluororubber, thermoplastic elastomers, and silicone.

[0117] In the embodiment of the application, the watch buckle 60 is used to move one of the first watch strap 32 and the second watch strap 33 relative to the second watch strap 33, thereby increasing or decreasing the inner diameter of the annular structure formed by the restraint member 30 to apply pressure to the measuring part. Exemplarily, the second end of the first watch strap 32 is connected to the watch buckle 60, and the second end of the second watch strap 33 is drively connected to the watch buckle 60. The watch buckle 60 is used to move the second end of the second watch strap 33 relative to the watch buckle 60, thereby increasing or decreasing the inner diameter of the annular structure formed by the pressure member 10.

[0118] There are no limitations on how the second end of the second watch strap 33 moves relative to the watch clasp 60. Exemplarily, the watch clasp 60 includes a drive motor (not shown) and a transmission component (not shown), and the second watch strap 33 includes a rack (not shown). The motor shaft of the drive motor is connected to the rack via the transmission component. When the drive motor rotates, the transmission component can drive the second watch strap 33 to move relative to the first watch strap 32, causing the inner diameter of the annular structure enclosed by the pressure member 10 to decrease or increase, thus achieving tightening and loosening.

[0119] It should be noted that, in addition to the drive motor and transmission components, the watch buckle 60 may also include at least one of the following components: watch buckle housing (not shown in the figure), battery (not shown in the figure), communication module (not shown in the figure), and control board (not shown in the figure).

[0120] The buckle housing is used to house the drive motor, transmission components, battery, communication module, and control board. The buckle housing can be made of metal alloys such as stainless steel, aluminum alloy, zinc alloy, magnesium alloy, and titanium alloy, or polymer materials such as polyamide, polycarbonate, polyoxymethylene, polybutylene terephthalate, and polyphenylene ether.

[0121] The battery can be a non-rechargeable small zinc-manganese dry cell battery, lithium-manganese battery, or alkaline button cell battery, or a rechargeable lithium-ion battery. If the battery is a rechargeable lithium-ion battery, the watch fastener 60 also includes a charging interface or charging coil, and the battery is connected to the charging interface or charging coil to charge the battery.

[0122] The communication module is used to receive external commands to control the direction and speed of the drive motor shaft rotation, so as to achieve the function of fast / slow tightening / unwinding.

[0123] The control board receives command signals from the communication module, processes them into corresponding motor operating voltage signals, and transmits them to the drive motor. Additionally, the control board can also modulate the battery's voltage and current to ensure a stable power supply to all modules.

[0124] See also Figure 9 As shown, the connecting line 40 is disposed on the inner side of the first watch band 32 and is used to connect the measuring part and the first watch band 32. Of course, the connecting line 40 can also be disposed inside the first watch band 32.

[0125] Understandably, when the thin-film sensor 20 is disposed inside the second strap 33, the connecting wire 40 may also be disposed inside the second strap 33 (not shown in the figure) or inside the second strap 33 (not shown in the figure).

[0126] It should be noted that, Figure 9 The electronic device shown may also include a thin film 70 (not shown in the figure). How to configure the thin film 70 can be found in [reference needed]. Figure 7 and Figure 8 The description. Alternatively, it can also be... Figure 9 The hardness of the encapsulation component 80 or the hardness of the second strap 33 is greater than the hardness of the thin film sensor 20, thereby removing the thin film component 70.

[0127] It should also be noted that, in Figure 9 In this case, since the electronic device is a smartwatch, the restraint member 30 is formed by the first strap 32, the second strap 33, and the watch body 31. However, the restraint member 30 can also be other structures. In some possible implementations, the restraint member 30 can also be a strap (not shown in the figure), with its opposite ends connected to a buckle 60. The buckle 60 is used to move one end of the strap relative to the other end, causing the inner diameter of the annular structure formed by the pressure member 10 to increase or decrease.

[0128] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0129] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0130] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0131] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0132] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0133] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A detection module, characterized in that, Includes pressure components and thin-film sensors; The pressure-applying component is used to apply pressure to the measuring area; The thin-film sensor is used to measure the pulse wave signal at the measurement site, and the thin-film sensor is disposed between the pressure member and the measurement site; The detection module further includes a thin-film component, which is used to reduce the sensitivity of the thin-film sensor, wherein: The thin-film component is disposed between the pressure-applying component and the thin-film sensor; or, The thin-film sensor is disposed between the thin-film component and the pressure-applying component; or, The thin film component includes a first part and a second part, the first part being disposed between the pressure member and the thin film sensor, and the thin film sensor being disposed between the first part and the second part.

2. The detection module according to claim 1, characterized in that, The detection module also includes a package, and the thin-film sensor is disposed between the package and the pressure-applying component and is shielded by the package.

3. The detection module according to claim 1 or 2, characterized in that, The pressurizing component includes a pressurizing airbag, and the thin-film sensor is disposed between the measuring part and the pressurizing airbag.

4. The detection module according to claim 3, characterized in that, The detection module also includes a restraint member for defining an annular structure surrounding the measurement site, and a pressure member is disposed between the restraint member and the thin-film sensor.

5. The detection module according to claim 3, characterized in that, The detection module also includes a pressure sensor, which is used to detect the pressure inside the pressurized airbag.

6. The detection module according to claim 4, characterized in that, The detection module also includes a pressure sensor, which is used to detect the pressure inside the pressurized airbag.

7. The detection module according to claim 1 or 2, characterized in that, The pressure-applying component includes a dial fastener and a restraint component. The first end of the restraint component is fixedly connected to the dial fastener, and the second end of the restraint component is tractively connected to the dial fastener. The dial fastener and the restraint component are used to form an annular structure that surrounds the measuring part and has a variable inner diameter. The thin-film sensor is disposed between the restraint component and the measuring part.

8. The detection module according to any one of claims 1, 2, 4 to 6, characterized in that, The thin-film sensor has a strip-shaped structure, and the length direction of the thin-film sensor is parallel to the length direction of the pressure member.

9. The detection module according to claim 3, characterized in that, The thin-film sensor has a strip-shaped structure, and the length direction of the thin-film sensor is parallel to the length direction of the pressure member.

10. The detection module according to claim 7, characterized in that, The thin-film sensor has a strip-shaped structure, and the length direction of the thin-film sensor is parallel to the length direction of the pressure member.

11. The detection module according to any one of claims 1, 2, 4 to 6, 9, and 10, characterized in that, The thin-film sensor is one of the following: a piezoelectric thin-film sensor, a piezoresistive thin-film sensor, a piezoresistive thin-film sensor, an ion-electron thin-film sensor, or a triboelectric thin-film sensor; or, The thin-film sensor includes a first electrode layer, a sensing layer, and a second electrode layer stacked together. One of the first electrode layer and the second electrode layer is disposed between the pressure member and the sensing layer, and the other is disposed between the sensing layer and the measurement part.

12. The detection module according to claim 3, characterized in that, The thin-film sensor is one of the following: a piezoelectric thin-film sensor, a piezoresistive thin-film sensor, a piezoresistive thin-film sensor, an ion-electron thin-film sensor, or a triboelectric thin-film sensor; or, The thin-film sensor includes a first electrode layer, a sensing layer, and a second electrode layer stacked together. One of the first electrode layer and the second electrode layer is disposed between the pressure member and the sensing layer, and the other is disposed between the sensing layer and the measurement part.

13. The detection module according to claim 7, characterized in that, The thin-film sensor is one of the following: a piezoelectric thin-film sensor, a piezoresistive thin-film sensor, a piezoresistive thin-film sensor, an ion-electron thin-film sensor, or a triboelectric thin-film sensor; or, The thin-film sensor includes a first electrode layer, a sensing layer, and a second electrode layer stacked together. One of the first electrode layer and the second electrode layer is disposed between the pressure member and the sensing layer, and the other is disposed between the sensing layer and the measurement part.

14. The detection module according to claim 8, characterized in that, The thin-film sensor is one of the following: a piezoelectric thin-film sensor, a piezoresistive thin-film sensor, a piezoresistive thin-film sensor, an ion-electron thin-film sensor, or a triboelectric thin-film sensor; or, The thin-film sensor includes a first electrode layer, a sensing layer, and a second electrode layer stacked together. One of the first electrode layer and the second electrode layer is disposed between the pressure member and the sensing layer, and the other is disposed between the sensing layer and the measurement part.

15. An electronic device, characterized in that, Includes the detection module as described in any one of claims 1 to 14.

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