Detection module and electronic equipment

Abstract

The embodiment of the invention provides a detection module and electronic equipment. The detection module comprises a pressurizing piece and a film sensor. And the pressurizing piece is used for applying pressure to the measuring part. The film sensor is used for measuring a pulse wave signal of the measuring part and is arranged between the pressurizing piece and the measuring part. According to the detection module and the electronic equipment provided by the embodiment of the invention, the difficulty of miniaturization of the electronic equipment can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of terminal technology, and in particular to a detection module and an electronic device. Background Art

[0002] At present, electronic devices such as smart bracelets and smart watches are integrated with blood pressure measurement functions. The electronic devices include air pumps, air bags and pressure sensors. The air pumps are used to inflate or deflate the air bags. The pressure sensors are used to measure the pressure inside the air bags. The air bags are used to surround the arteries of the subject and compress the arteries of the subject. However, electronic devices are difficult to miniaturize. Therefore, how to miniaturize electronic devices has become an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a detection module and an electronic device, which can reduce the difficulty of miniaturization.

[0004] In a first aspect, the present application provides a detection module, including a pressure member and a thin film sensor. The pressure member is used to apply pressure to a measurement site. The thin film sensor is used to measure a pulse wave signal of the measurement site, and the thin film sensor is arranged between the pressure member and the measurement site.

[0005] When the detection module provided in the embodiment of the present application detects blood pressure, the pressure-applying component applies pressure to the measuring part of the subject, so that the blood vessels at the measuring part are squeezed to different degrees and generate pulse wave signals of different shapes and amplitudes. At the same time, the thin film sensor can measure the pulse wave signal in an area above the measuring part, and the blood pressure and / or heart rate of the subject can be calculated based on the collected pulse wave signal. Since the thin film sensor is used to collect the pulse wave signal, the signal collection can be decoupled from the pressure-applying component, and the size constraint of the pressure-applying component can be reduced, which is helpful for miniaturization of the detection module. In addition, by collecting the changes of the pulse wave signal through the thin film sensor, the detection module measures the pulse wave signal through a mechanical method, which is not affected by factors such as ambient light, skin color, sweat, etc., and the accuracy of the detection can be improved. In addition, the thin film sensor collects the pulse wave signal in an area above the measurement site, avoiding the inaccurate measurement caused by position deviation in single-point measurement. It can also avoid the large data scale, high hardware complexity, hardware computing power and algorithm requirements brought about by the use of pressure sensor arrays to collect pulse wave signals in an area. There is no need to consider the consistency of multiple sensor units, which can ensure higher measurement efficiency and more accurate results.

[0006] In a possible implementation, the detection module further includes a film member, wherein: the film member is disposed between the pressurizing member and the film sensor. Or, the film sensor is disposed between the film member and the pressurizing member. Or, the film member includes a first portion and a second portion, the first portion is disposed between the pressurizing member and the film sensor, and the film sensor is disposed between the first portion and the second portion.

[0007] The detection module provided in the embodiment of the present application can reduce the sensitivity of the thin film sensor by setting a thin film component, avoid the thin film sensor outputting signals due to slight changes in the measuring part, and reduce the probability of accidental operation of the thin film sensor.

[0008] In a possible implementation, the detection module further includes a packaging component, and the thin film sensor is disposed between the packaging component and the pressurizing component and is shielded by the packaging component.

[0009] The detection module provided in the embodiment of the present application can prevent the thin film sensor from being worn and can also isolate it from corrosion by oil, sweat, water vapor and oxygen, so as to increase the service life of the thin film sensor by arranging the thin film sensor between the pressure-applying part and the packaging part and shielding it by the packaging part.

[0010] In a possible implementation, the pressurizing element includes a pressurizing airbag, and the film sensor is used to be arranged between the measuring part and the pressurizing airbag.

[0011] The detection module provided in the embodiment of the present application inflates or deflates the pressurized airbag to expand or shrink the pressurized airbag, thereby pressurizing, decompressing, or maintaining a fixed pressure on the measurement site, ensuring that the pulse wave signal at the measurement site changes, so that the thin film sensor can collect the pulse wave signal. In addition, since the pulse wave signal is collected by the thin film sensor, the size constraint on the pressurized airbag is reduced, and the pressurized airbag can be designed to be narrower and shorter, which helps to reduce the volume of the detection module.

[0012] In a possible implementation, the detection module further includes a restraining member, which is used to define an annular structure surrounding the measurement site, and the pressure member is disposed between the restraining member and the film sensor.

[0013] The detection module provided in the embodiment of the present application arranges the pressurizing member before the restraining member and the thin film sensor so that the pressurizing member can pressurize the measuring part, thereby ensuring that the blood vessels at the measuring part generate a pulse wave signal due to compression.

[0014] In a possible implementation, the detection module further includes an air pressure sensor, and the air pressure sensor is used to detect the pressure in the pressurized airbag.

[0015] The detection module provided in the embodiment of the present application detects the pressure in the pressurized airbag through the air pressure sensor, and can obtain blood pressure or heart rate according to the pressure change in the pressurized airbag, so that the blood pressure or heart rate obtained according to the pulse wave signal collected by the thin film sensor can be corrected, thereby further improving the accuracy of the measurement. In addition, when the thin film sensor cannot measure the static force, it can ensure that the pressurized airbag can apply pressure to the measurement site with a fixed pressure to achieve the heart rate measurement function.

[0016] In a possible embodiment, the pressure-applying member includes a buckle member and a restraining member, the first end of the restraining member is fixedly connected to the buckle member, the second end of the restraining member is transmission-connected to the buckle member, the buckle member and the restraining member are used to enclose an annular structure surrounding a measuring part and having a variable inner diameter, and the thin film sensor is arranged between the restraining member and the measuring part.

[0017] The detection module provided in the embodiment of the present application applies pressure to the measuring part through a pressure piece composed of a buckle and a restraining piece, which can simplify the structural design of the detection module. For example, there is no need for parts such as an air pump and an air pressure sensor. In addition, since the airbag is removed, the thickness of the pressure piece can also be reduced. In addition, the inner diameter of the annular structure defined by the pressure piece is variable, so that the detection module has an automatic tightening function, and the measurement effect is not affected by the initial tightness of the user's wearing, thus avoiding measurement errors caused by wearing too loose or too tight.

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

[0019] The detection module provided in the embodiment of the present application can ensure that the thin film sensor is always opposite to the artery at the measurement site by making the length direction of the thin film sensor parallel to the length direction of the pressure member, so as to collect the pulse wave signal. In addition, it can also adapt to the measurement sites of different subjects, thereby improving the versatility of the detection module.

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

[0021] In a possible implementation, the thin film sensor includes a first electrode layer, a sensing layer, and a second electrode layer which are stacked, 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 measuring site.

[0022] One of the first electrode layer and the second electrode layer of the thin film sensor in the detection module provided in the embodiment of the present application is arranged between the pressure-applying member and the sensing layer, and the other is arranged between the sensing layer and the measuring part, which can ensure that the pulse wave signal is collected when the blood vessels at the measuring part generate the pulse wave signal.

[0023] A second aspect of the present application provides an electronic device, comprising a detection module as described in any one of the first aspects.

[0024] The electronic device provided by the embodiment of the present application reduces the difficulty of miniaturization of the electronic device by adopting the detection module of the first aspect, and can miniaturize the electronic device. In addition, since the detection module collects the pulse wave signal through the thin film sensor, the accuracy of the electronic device in detecting the heart rate can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a first electronic device provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A structural block diagram of the electronic device shown;

[0027] Figure 3 for Figure 1 A cross-sectional view of the film sensor and the pressurizing member in cooperation;

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

[0029] Figure 5 for Figure 4 A cross-sectional view of an electronic device in FIG.

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

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

[0032] Figure 8 A partial cross-sectional view of a fifth electronic device provided in an embodiment of the present application;

[0033] Fig. 9 A schematic diagram of the structure of a sixth electronic device provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 10. Pressurized parts;

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

[0037] 30. restraint; 31. watch body; 32. first watch strap; 33. second watch strap;

[0038] 40. Connecting wire;

[0039] 50. Air pressure sensor;

[0040] 60. Watch fasteners;

[0041] 70. Thin film parts;

[0042] 80. Packaging;

[0043] 81. Controller; 82. Air pump; 83. Exhaust valve. DETAILED DESCRIPTION

[0044] At present, electronic devices such as smart bracelets, smart watches, and watch-type sphygmomanometers are integrated with measurement functions such as blood pressure and heart rate. Among them, the electronic device includes an air pump, an air bag and a pressure sensor. The air pump is used to inflate or deflate the air bag, and the pressure sensor is used to measure the pressure inside the air bag. The air bag expands to compress the arterial blood vessels in the wrist, and the pulsation amplitude of the blood vessels will also change during the change of external pressurization, which in turn affects the air pressure inside the air bag. During the entire air bag pressurization process, the pressure sensor will detect the pulse wave oscillation envelope signal that first increases and then decreases, and judge the blood pressure based on the envelope signal. In addition, the electronic device uses photoplethysmography (PPG) to measure heart rate. Among them, PPG is a method of shining light into the skin and measuring the light scattering caused by blood flow. This method is based on the following working principle: when hemodynamic parameters, such as blood pulse rate (heart rate) or blood volume (cardiac output), change, the light entering the human body will undergo predictable scattering. These scattered lights are received by photosensors 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, in order 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 width of the airbag, making the electronic device larger and difficult to miniaturize. In addition, the airbag needs to compress the radial and ulnar arteries at the wrist, and its upper limit of pressure is large. It is difficult to cover people of all wrist circumferences with a standard-sized airbag, so multiple airbags are needed, which increases the cost.

[0046] In addition, since PPG measurement is based on optical principles, all factors that affect the intensity of scattered light may cause measurement errors. For example, dark skin has a higher absorption rate for light, resulting in less scattered light received by the photosensor, which causes a larger error. For another example, when wearing it loosely, the gap between the wrist and the PPG module is larger, and more ambient light is introduced, which is superimposed with the scattered light signal and causes an impact. In addition, the displacement of the sensor on the wrist caused by movement will also cause deviations in the scattered light signal, resulting in measurement errors.

[0047] In view of this, the embodiments of the present application provide a detection module and an electronic device, which can reduce the difficulty of miniaturization of electronic devices. In addition, the accuracy of measuring heart rate and / or blood pressure can be improved. In addition, the requirements of the electronic device for computing power can be reduced to improve the feasibility of the electronic device.

[0048] The following describes the implementation of the detection module and the electronic device provided in the embodiments of the present application.

[0049] Figure 1 This is a schematic diagram of the structure of the first electronic device provided in the embodiment of the present application. Figure 1 As shown, the electronic device of the embodiment of the present application includes a detection module, which is used to detect the blood pressure and / or heart rate of the subject.

[0050] Among them, the electronic device provided in the embodiment of the present application may include but is not limited to a smart bracelet, a smart watch, a watch, a watch-type blood pressure meter or a blood pressure meter, etc. In the embodiment of the present application, a smart watch is taken as an example of the above electronic device for explanation.

[0051] Continue to see Figure 1 As shown, the detection module includes a pressure member 10 and a thin film sensor 20. The pressure member 10 is used to apply pressure to the measurement site (not shown in the figure) of the subject. The thin film sensor 20 is used to measure the pulse wave signal of the measurement site, and the thin film sensor 20 is arranged between the pressure member 10 and the measurement site.

[0052] The film sensor 20 refers to a flexible sheet sensor having a thickness less than a preset thickness. For example, in the embodiment of the present application, the film sensor 20 is a flexible sheet sensor having a thickness less than 0.5 mm.

[0053] Combination Figure 1As shown, during the process of the electronic device measuring the measuring part of the subject, the pressure member 10 applies pressure to the measuring part of the subject, so that the blood vessels in the measuring part are squeezed to different degrees and generate pulse wave signals of different shapes and amplitudes. At the same time, the thin film sensor 20 can measure the pulse wave signal in an area above the measuring part, and the blood pressure and / or heart rate of the subject can be calculated based on the collected pulse wave signal. Among them, the pressure member 10 applies multiple different pressure values ​​to the measuring part, so that the envelope of the pulse wave signal changes, and the blood pressure value can be calculated based on the envelope change. The pressure member 10 applies a fixed pressure to the measuring part, and the frequency of the pulse wave signal is counted, and the heart rate value can be calculated based on the frequency of the pulse wave signal.

[0054] In the embodiment of the present application, the pulse wave signal of the measuring part is collected by the thin film sensor 20, and the pressure acting on the measuring part is provided in combination with the pressure applying part 10, so that the collection of the pulse wave signal can be decoupled from the pressure applying part 10, thereby reducing the size constraints of the pressure applying part 10, and the pressure applying part 10 can be designed to be narrower and shorter, thereby reducing the volume of the pressure applying part 10, which in turn helps to miniaturize the detection module.

[0055] In the embodiment of the present application, a fixed pressure is applied to the measuring part 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 related art of measuring heart rate by photoplethysmography, the detection module provided in the embodiment of the present application can measure heart rate without being affected by factors such as ambient light, skin color, sweat, etc., and can improve the accuracy of detection.

[0056] In the embodiment of the present application, the thin film sensor 20 is used to collect the pulse wave signal in an area above the measurement site, thereby avoiding the inaccurate measurement caused by the position deviation of the single point measurement. In addition, it can also avoid the problem of large data scale, high hardware complexity, hardware computing power and algorithm requirements caused by the use of a pressure sensor array to collect the pulse wave signal in an area, and even avoid the problem of maintaining the consistency of multiple sensor units, which can ensure higher measurement efficiency and more accurate results.

[0057] Continue to see Figure 1 As shown, along the length direction of the pressure member 10 (such as Figure 1 In the Y direction, the length of the film sensor 20 is less than the length of the pressure member 10. Of course, the length of the film sensor 20 may also be equal to the length of the pressure member 10.

[0058] It should be noted that during the measurement process, the pressure member 10 covers the two arteries at the measurement site, and the pressure member 10 drives the two arteries to vibrate, thereby causing the skin at the measurement site to vibrate, which will generate multiple signal sources, at least one of which 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, the thin film sensor 20 may be interfered by the clutter signal, 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, the thin film sensor 20 may not cover the artery, and the pulse wave signal may not be measured.

[0059] In some embodiments, see Figure 1 As shown, the thin film sensor 20 can be connected to the outer surface of the pressurizing member 10, which can not only fix the thin film sensor 20 to the pressurizing member 10, but also allow the thin film sensor 20 to be arranged between the pressurizing member 10 and the measuring part. The thin film sensor 20 can be connected to the surface of the pressurizing member 10 by bonding, hot pressing, etc.

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

[0061] In some possible implementations, combined with Figure 1 As shown, the film sensor 20 can be in a strip-shaped structure, and the length direction of the film sensor 20 is parallel to the length direction of the pressure member 10. Such an arrangement can ensure that the film sensor 20 is always opposite to the artery at the measurement site, which can not only ensure that the film sensor 20 collects the pulse wave signal, but also reduce the length of the film sensor 20 and thus reduce the cost of the film sensor 20. In addition, it can also adapt to the measurement sites of different subjects to improve the versatility of the detection module.

[0062] There is no limitation on the specific shape of the thin film sensor 20. For example, the thin film sensor 20 may be rectangular.

[0063] It should be noted that the thin film sensor 20 may be a circular structure, a square structure, etc. in addition to a strip-shaped structure.

[0064] In some possible implementations, combined with Figure 1 As shown, the pressurizing member 10 includes a pressurizing airbag. Among them, the thin film sensor 20 is used to be arranged between the measuring part and the pressurizing airbag, and the pressurizing airbag is in a strip-shaped structure. During the measurement process, the pressurizing airbag covers the artery at the measuring part, and the pressurizing airbag is expanded or reduced by inflating or deflating the pressurizing airbag to pressurize, decompress or maintain a fixed pressure on the measuring part to ensure that the pulse wave signal at the measuring part changes. At the same time, the thin film sensor 20 can collect the pulse wave signal.

[0065] Accordingly, since the pulse wave signal is collected by the thin film sensor 20 and the pressurized airbag is used to apply pressure to the measurement site, the pressurized airbag is decoupled from the collection of the pulse wave signal, thereby reducing the size constraint of the pressurized airbag. The pressurized airbag can be designed to be narrower and shorter, which helps to reduce the volume of the detection module.

[0066] The specific material of the pressurized airbag is not limited here. The material of the pressurized airbag may include polymer materials such as thermoplastic polyurethane elastomer, thermoplastic elastomer, polyurethane, nitrile rubber, etc.

[0067] The pressurized airbag may be a single-layer structure, or a multi-layer structure, which is not limited here.

[0068] The interior of the pressurized airbag is a closed structure, and the pressurized airbag can be connected to the outside through one or more air nozzles (not shown in the figure), so that the external gas can enter and exit the interior of the pressurized airbag to achieve the expansion and contraction of the pressurized airbag. There is no limitation on how to allow the gas to enter and exit the pressurized airbag.

[0069] In some possible implementations, combined with Figure 1 As shown, the detection module may further include a restraining member 30. The restraining member 30 is used to define an annular structure surrounding the measurement site, and the pressurizing member 10 is arranged between the restraining member 30 and the film sensor 20. Such an arrangement allows the pressurizing member 10 to pressurize the measurement site, ensuring that the blood vessels at the measurement site generate a pulse wave signal due to compression.

[0070] It is understandable that, combined with Figure 1It can be seen that the pressure piece 10 is a strip-shaped structure, and the pressure piece 10 is a pressurized airbag. The pressurized airbag cannot surround the measurement site, so the pressurized airbag cannot apply pressure to the measurement site. Therefore, in the embodiment of the present application, by arranging the pressure piece 10 between the film sensor 20 and the restraining member 30, the pressure piece 10 can apply pressure to the measurement site during the measurement process, thereby ensuring that the film sensor 20 can measure the pulse wave signal.

[0071] There is no limitation on the specific structure of the restraining member 30 , as long as the pressure member 10 can apply pressure to the measuring part.

[0072] For example, see Figure 1 As shown, the restraint 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 the opposite ends of the watch body 31, and the second end of the first watch strap 32 is detachably connected to the second end of the second watch strap 33. The 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, so that the pressure member 10 is disposed between the first strap 32 and the measuring part. During the measurement process, the second end of the first strap 32 is connected to the second end of the second strap 33, so that the restraining member 30 forms an annular structure surrounding the measuring part, so that the pressure member 10 is disposed between the restraining member 30 and the measuring part, and then the pressure member 10 can apply pressure to the measuring part.

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

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

[0075] In the embodiment of the present application, there is no limitation on the specific structure of the watch body 31. For example, 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 opposite ends of the housing, and the display panel is used to display information to be displayed, such as text, images, etc.

[0076] It should be noted that the restraint 30 may be other structures besides the watch body 31, the first strap 32 and the second strap 33. Exemplarily, the restraint 30 is a strip-shaped belt-like member (not shown in the figure), and the pressure member 10 is arranged on the inner side of the belt-like member, and the belt-like member is used to form an annular structure surrounding the measurement part. Or in some embodiments, the restraint 30 is an annular member (not shown in the figure), and the pressure member 10 is arranged on the inner side of the annular member and between the annular member and the measurement part.

[0077] Figure 2 for Figure 1 In some possible implementations, see Figure 2 As shown, the electronic device may further include an air pump 82 and an exhaust valve 83. The pressurized airbag may be connected to the air pump 82 and the exhaust valve 83 respectively through two air nozzles, and the exhaust valve 83 is connected to the air pump. The pressurized airbag may be inflated or deflated by cooperating with the air pump 82 and the exhaust valve 83, so that the expansion and contraction of the pressurized airbag can meet the requirements of applying pressure to or releasing pressure on the measurement site.

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

[0079] In some possible implementations, see Figure 2 As shown, the electronic device may further include a controller 81, which is electrically connected to the film sensor 20, the air pump 82, and the exhaust valve 83. The controller 81 may 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 may also calculate the blood pressure and / or heart rate based on the pulse wave signal collected by the film sensor 20.

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

[0081] In some possible implementations, see Figure 2 As shown, the detection module may also include an air pressure sensor 50, which is used to detect the pressure in the pressurized airbag. Accordingly, by detecting the pressure in the pressurized airbag through the air pressure sensor 50, the blood pressure or heart rate can be obtained according to the pressure change in the pressurized airbag, so that the blood pressure or heart rate obtained according to the pulse wave signal collected by the thin film sensor 20 can be corrected, thereby further improving the accuracy of the measurement. In addition, when the thin film sensor 20 cannot measure the static force, it can ensure that the pressurized airbag can apply pressure to the measurement site through a fixed pressure to achieve the heart rate measurement function.

[0082] It is understandable that when the film sensor 20 can only detect dynamic force, if there is no air pressure sensor 50, then when the pressurized airbag applies a fixed pressure to the measurement site, the pressure collected by the film sensor 20 is zero, which makes it impossible to measure the frequency of the pulse wave signal under the fixed pressure, and thus the heart rate cannot be measured. Therefore, when the film sensor 20 cannot measure static force, the air pressure sensor 50 detects the pressure in the pressurized airbag, which can ensure that the pressurized airbag can apply a fixed pressure to the measurement site to achieve heart rate detection.

[0083] There is no limitation on the specific installation position of the air pressure sensor 50. In one embodiment, the air pressure sensor 50 can be disposed inside the pressurized airbag (not shown in the figure). Alternatively, in one embodiment, the air pressure sensor 50 can also be disposed inside the watch body 31 (not shown in the figure).

[0084] Figure 3 for Figure 1 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 that are stacked. One of the first electrode layer 21 and the second electrode layer 23 is disposed between the pressure member 10 and the sensing layer 22, and the other is disposed between the sensing layer 22 and the measurement site, for example Figure 3 As shown, the first electrode layer 21 is arranged between the pressurizing member 10 and the sensing layer 22, and the second electrode layer 23 is used to be arranged between the sensing layer 22 and the measuring part.

[0085] When the pressure member 10 applies pressure to the measuring part, the second electrode layer 23 is used to be close to the skin of the measuring part. When the sensing layer 22 is subjected to external pressure, the distribution of charged particles in the material will change, such as electrons and ions. This change is transmitted by the electrode layer and then generates a change in the electrical signal. The thin film sensor 20 measures the pressure value through a one-to-one mapping of the electrical signal and the external pressure value. In the embodiment of the present application, the external pressure value can be understood as the pressure applied by the blood vessel to the thin film sensor 20 under the pressure applied by the pressure member 10.

[0086] In some embodiments, see Figure 3 As shown, along the thickness direction of the thin film sensor 20 (eg Figure 3 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 may be greater than or less than the thin film sensor 20 (not shown in the figure).

[0087] In some embodiments, see Figure 3As shown, the thickness of the first electrode layer 21 and the second electrode layer 23 are the same along the thickness direction of the thin film sensor 20, and the thickness of any one of the first electrode layer 21 and the second electrode layer 23 is equal to half the thickness of the sensing layer 22. This arrangement can reduce the thickness of the thin film sensor 20, which is conducive to miniaturization of the detection module.

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

[0089] The connection line 40 may be electrically connected to at least one of the thin film sensor 20 and the controller 81 by plugging, welding, bonding with conductive adhesive, or the like.

[0090] There is no limitation on the specific type of the connecting wire 40. The types of the connecting wire 40 may include but are not limited to enameled wire, rubber wire, flexible printed circuit (FPC) wiring. In addition, the conductor material of the connecting wire 40 may include but is not limited to gold, silver, copper, aluminum, graphite, silver nanowire, etc.

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

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

[0093] There is no limitation on how the connection line 40 is connected to the pressure member 10. For example, the connection line 40 can be connected to the pressure member 10 by surface bonding, deposition, etc.

[0094] In some possible implementations, combined with Figure 4 and Figure 5As shown, the detection module may further include a packaging member 80, and the thin film sensor 20 is disposed between the packaging member 80 and the pressurizing member 10 and is shielded by the packaging member 80. Such a configuration can prevent the thin film sensor 20 from being worn, and can also isolate the thin film sensor 20 from being corroded by oil, sweat, water vapor, and oxygen, so as to increase the service life of the thin film sensor 20.

[0095] The packaging component 80 can be connected to the surface of the pressurizing component 10 by bonding or heat pressing to cover the thin film sensor 20 .

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

[0097] Continue to see Figure 4 and Figure 5 As shown, since the connecting wire 40 is arranged outside the pressure member 10, the packaging member 80 also covers part of the connecting wire 40. Of course, when the connecting wire 40 is arranged inside the pressure member 10, the packaging member 80 will not cover the connecting wire 40 (not shown in the figure).

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

[0099] Figure 7 A partial cross-sectional view of a fourth electronic device provided in an embodiment of the present application. Figure 7 and Figure 5 The difference is that the detection module can also include a film member 70, which is arranged between the pressure member 10 and the film sensor 20. This arrangement can reduce the sensitivity of the film sensor 20, avoid the film sensor 20 outputting signals due to slight changes in the measuring part, and reduce the probability of accidental operation of the film sensor 20.

[0100] Since there are natural fluctuations in the measurement site, such as unconscious vibrations of the skin of the wrist, the vibrations will also cause the film sensor 20 to output a signal, but this signal is meaningless, so the sensitivity of the film sensor 20 needs to be controlled within a certain range. Among them, if the sensitivity of the film sensor 20 is too high, the film sensor 20 will output a signal due to the natural fluctuations in the measurement site. If the sensitivity of the film sensor 20 is too low, the accuracy of the measurement will be affected. Therefore, by reducing the sensitivity of the film sensor 20 through the film member 70, the sensitivity of the film sensor 20 can be controlled within a certain range.

[0101] In the embodiment of the present application, the material of the film member 70 may include but is not limited to polyethylene naphthalate, polyethylene terephthalate, etc.

[0102] In the embodiment of the present application, there is no limitation on the specific thickness of the film 70 , for example, the thickness of the film 70 may be 100 μm. The greater the thickness of the film 70 , the greater the reduction in sensitivity of the film sensor 20 .

[0103] Continue to see Figure 7 As shown, the area of ​​the film member 70 is larger than the area of ​​the film sensor 20. In other words, along the thickness direction of the film sensor 20 (eg Figure 7 In the X direction), the projection of the film member 70 covers the projection of the film sensor 20. Of course, the area of ​​the film member 70 may also be equal to the area of ​​the film sensor 20 (not shown in the figure). Therefore, the area of ​​the film member 70 is greater than or equal to the area of ​​the film sensor 20, which can prevent the film sensor 20 from being affected in the measurement effect due to the bending of the film member 70 and reduce the sensitivity of the film sensor 20.

[0104] Continue to see Figure 7 As shown, the package 80 covers the thin film sensor 20 and the thin film member 70 at the same time. In other words, the package 80 shields both the thin film member 70 and the thin film sensor 20. Of course, the package 80 can also shield part of the thin film member 70 (not shown in the figure) while covering the thin film sensor 20.

[0105] It should be noted that, since the film sensor 20 is a flexible sheet sensor with a thickness of less than 0.5 mm, the film sensor 20 is preferably matched with a hard object, that is, the film sensor 20 is matched with an object with a hardness greater than that of the film sensor 20. Figure 1It can be seen that the two sides of the film sensor 20 are the pressurized airbag and the skin of the measurement site, respectively. Since the hardness of the pressurized airbag and the skin of the measurement site is smaller than that of the film sensor 20, noise signals that interfere with the film sensor 20 and / or cause the signal output by the film sensor 20 to be unstable will be generated. Therefore, if the film sensor 20 is used with a soft object, the measurement effect will be reduced. It can be seen that at least one side of the film sensor 20 is provided with an object with a harderness greater than that of the film sensor 20, which can reduce the sensitivity of the film sensor 20 and improve the measurement effect.

[0106] In summary, in addition to disposing the film member 70 between the film sensor 20 and the pressure member 10 , the sensitivity of the film sensor 20 can be controlled within a certain range. Figure 8 A partial cross-sectional view of a fifth electronic device provided in an embodiment of the present application. Figure 8 As shown, the film sensor 20 may also be disposed between the pressure member 10 and the film member 70, and the sensitivity of the film sensor 20 may also be controlled within a certain range.

[0107] Alternatively, in some embodiments, the film member 70 may also include a first portion and a second portion (not shown in the figure), the first portion being disposed between the pressure member 10 and the film sensor 20, and the film sensor 20 being disposed between the first portion and the second portion, and the sensitivity of the film sensor 20 may also be controlled within a certain range. The thickness 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, in addition to reducing the sensitivity of the thin film sensor 20 by the thin film member 70, the thin film member 70 can also be removed if one side of the thin film sensor 20 is provided with something with a hardness greater than the hardness of the thin film sensor 20. For example, the hardness of the pressurized airbag is greater than the hardness of the thin film sensor 20, and the thin film member 70 can be removed while the sensitivity of the thin film sensor 20 is reduced by the pressurized airbag. Alternatively, in some embodiments, the hardness of the packaging member 80 is greater than the hardness of the thin film sensor 20, and the thin film member 70 can be removed while the hardness of the thin film sensor 20 is reduced by the packaging member 80.

[0109] In the above content, the pressure on the measuring part is achieved by cooperating with the pressurized airbag and the restraining member 30. Of course, the restraining member can also be removed, and the pressurized member 10 can apply pressure to the measuring part. In some possible implementations, the pressurized member 10 can also include a pressurized airbag and a variable diameter structure (not shown in the figure), the pressurized airbag is an annular structure, and the variable diameter structure is used to change the outer diameter of the pressurized airbag so that the pressurized airbag can cooperate with different subjects.

[0110] Alternatively, in some possible implementations, the pressurizing member 10 may also include a first structure (not shown in the figure), a second structure (not shown in the figure), and a pressurized airbag of a strip structure (not shown in the figure), the first structure and the second structure are respectively arranged at opposite ends of the pressurized airbag, and the first structure and the second structure are detachably connected. During the measurement process, the first structure and the second structure are connected, so that the pressurized airbag forms an annular structure surrounding the measurement site, so that the thin film sensor 20 is arranged between the pressurized airbag and the measurement site, and then the thin film sensor 20 can collect the pulse wave signal.

[0111] The first structure can be detachably connected to the second structure by bonding, snapping, etc.

[0112] Fig. 9 A schematic diagram of the structure of a sixth electronic device provided in an embodiment of the present application. Fig. 9 and Figure 1 The difference is that the pressure-applying member 10 includes a fastener 60 and a restraining member 30, the first end of the restraining member 30 is fixedly connected to the fastener 60, the second end of the restraining member 30 is transmission-connected to the fastener 60, the fastener 60 and the restraining member 30 are used to enclose an annular structure surrounding the measuring part and with a variable inner diameter, and the film sensor 20 is arranged between the restraining member 30 and the measuring part.

[0113] Accordingly, by applying pressure to the measuring part through the pressure member 10 composed of the clasp 60 and the binding member 30, the structural design of the detection module can be simplified, for example, there is no need for parts such as the air pump 82 and the air pressure sensor 50. In addition, since the airbag is removed, the thickness of the pressure member 10 can also be reduced. In addition, the inner diameter of the annular structure defined by the pressure member 10 is variable, so that the detection module has an automatic tightening function, and the measurement effect is not affected by the initial tightness of the user's wearing, avoiding the measurement error caused by wearing too loose or too tight.

[0114] Continue to see Fig. 9 As shown, the binding member 30 includes a watch body 31, a first watch band 32 and a second watch band 33. The first end of the first watch band 32 and the first end of the second watch band 33 are respectively connected to the opposite ends of the watch body 31, and the second end of the first watch band 32 and the second end of the second watch band 33 are respectively connected to the clasp 60. The film sensor 20 is disposed on the inner side of one of the first watch band 32 and the second watch band 33, for example Fig. 9 As shown, the film sensor 20 is arranged on the inner side of the first strap 32. Of course, the film sensor 20 can also be arranged on the inner side of the second strap 33 (not shown in the figure).

[0115] Among them, at least one of the first strap 32 and the second strap 33 can be connected to the watch body 31 by gluing, hot melting, snapping, etc.

[0116] There is no limitation on the specific materials of the first strap 32 and the second strap 33. For example, the material of at least one of the first strap 32 and the second strap 33 may include, but is not limited to, polymers or hydrate materials such as fluororubber, thermoplastic elastomer, and silicone.

[0117] In the application embodiment, the clasp 60 is used to move one of the first strap 32 and the second strap 33 relative to the second strap 33, so that the inner diameter of the annular structure surrounded by the restraining member 30 becomes larger or smaller, so as to apply pressure to the measurement site. Exemplarily, the second end of the first strap 32 is connected to the clasp 60, and the second end of the second strap 33 is transmission-connected to the clasp 60, and the clasp 60 is used to move the second end of the second strap 33 relative to the clasp 60, so that the inner diameter of the annular structure surrounded by the pressure member 10 becomes larger or smaller.

[0118] There is no limitation on how the clasp 60 moves the second end of the second strap 33 relative to the clasp 60. For example, the clasp 60 includes a drive motor (not shown in the figure) and a transmission member (not shown in the figure), and the second strap 33 includes a rack (not shown in the figure), and the motor shaft of the drive motor is connected to the rack through the transmission member. When the drive motor rotates, the transmission member can drive the second strap 33 to move relative to the first strap 32, so that the inner diameter of the annular structure surrounded by the pressure member 10 becomes smaller or larger, thereby achieving tightening and loosening.

[0119] It should be noted that, in addition to the driving motor and the transmission parts, the buckle 60 may also include at least one of the buckle housing (not shown in the figure), a battery (not shown in the figure), a communication module (not shown in the figure) and a control panel (not shown in the figure).

[0120] Among them, the buckle shell is used to accommodate the drive motor, transmission parts, batteries, communication modules and control boards. The material of the buckle shell can be metal alloys such as stainless steel, aluminum alloy, zinc alloy, magnesium alloy, titanium alloy, or it can also be polymer materials such as polyamide, polycarbonate, polyoxymethylene, polybutylene terephthalate, polyphenylene ether, etc.

[0121] The battery can be a small non-rechargeable zinc-manganese dry cell, a lithium-manganese or alkaline button cell, or a rechargeable lithium-ion battery. If the battery is a rechargeable lithium-ion battery, the buckle 60 further includes a charging port or a charging coil, and the battery is connected to the charging port or the charging coil, and the battery is charged through the charging port or the charging coil.

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

[0123] The control board is used to receive the command signal transmitted by the communication module, process it into the corresponding motor operation voltage signal and transmit it to the drive motor. In addition, the control board can also realize the voltage and current modulation function of the battery so that it can stably supply power to each module.

[0124] Continue to see Fig. 9 As shown, the connection line 40 is arranged on the inner side of the first strap 32 and is used to be arranged between the measurement part and the first strap 32. Of course, the connection line 40 can also be arranged inside the first strap 32.

[0125] It is understandable that when the film sensor 20 is disposed on the inner side of the second strap 33, the connecting line 40 can also be disposed on the inner side of 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 Fig. 9 The electronic device shown in FIG. 1 may further include a thin film member 70 (not shown in the figure). How to set the thin film member 70 may refer to FIG. Figure 7 and Figure 8 Alternatively, you can also Fig. 9 The hardness of the packaging member 80 or the hardness of the second strap 33 is greater than the hardness of the thin film sensor 20, so the thin film member 70 is removed.

[0127] It should also be noted that in Fig. 9 In the embodiment, since the electronic device is a smart watch, the restraint 30 is composed of a first strap 32, a second strap 33 and a watch body 31. However, the restraint 30 may also be other structures. In some possible implementations, the restraint 30 may also be a strap member (not shown in the figure), and the opposite ends of the strap member are respectively connected to the clasp 60, and the clasp 60 is used to move one end of the strap member relative to the other end of the strap member, so that the inner diameter of the annular structure surrounded by the pressure member 10 becomes larger or smaller.

[0128] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0129] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0130] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0131] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0132] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0133] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean 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 the present application.

Claims

1. A detection module, characterized in that: including a pressurized part and a thin film sensor; The pressure member is used to apply pressure to the measuring part; The thin film sensor is used to measure the pulse wave signal of the measuring part, and the thin film sensor is arranged between the pressurizing member and the measuring part.

2. The detection module according to claim 1, characterized in that: The detection module also includes a thin film component, wherein: The film member is disposed between the pressure member and the film sensor; or, The film sensor is disposed between the film member and the pressure member; or, The film member includes a first portion and a second portion, the first portion is disposed between the pressure member and the film sensor, and the film sensor is disposed between the first portion and the second portion.

3. The detection module according to claim 1 or 2, characterized in that: The detection module further includes a packaging component, and the thin film sensor is arranged between the packaging component and the pressurizing component and is shielded by the packaging component.

4. The detection module according to any one of claims 1 to 3, characterized in that: The pressurizing member includes a pressurizing airbag, and the film sensor is used to be arranged between the measuring part and the pressurizing airbag.

5. The detection module according to claim 4, characterized in that: The detection module further includes a binding member, which is used to define an annular structure surrounding the measurement site, and the pressure member is arranged between the binding member and the film sensor.

6. The detection module according to claim 4 or 5, characterized in that: The detection module also includes an air pressure sensor, which is used to detect the pressure in the pressurized airbag.

7. The detection module according to any one of claims 1 to 3, characterized in that: The pressure-applying member includes a buckle member and a restraining member, wherein the first end of the restraining member is fixedly connected to the buckle member, and the second end of the restraining member is transmission-connected to the buckle member, and the buckle member and the restraining member are used to form an annular structure surrounding the measuring part and having a variable inner diameter, and the thin film sensor is arranged between the restraining member and the measuring part.

8. The detection module according to any one of claims 1 to 7, characterized in that: The film sensor is in a strip-shaped structure, and the length direction of the film sensor is parallel to the length direction of the pressure member.

9. The detection module according to any one of claims 1 to 8, characterized in that: The thin film sensor is one of the following: a piezoelectric thin film sensor, a piezoresistive thin film sensor, a piezocalytic thin film sensor, an ion-electronic 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 which are stacked, 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 measuring site.

10. An electronic device, characterized in that: Comprising a detection module as described in any one of claims 1 to 9.

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