Wearable detection equipment based on antenna

Abstract

The invention relates to a wearable detection device based on an antenna, the device comprises a collection module, a PCB, a flexible conformal antenna and a silica gel shell, the collection module is used for collecting human body signals, the silica gel shell is used for packaging the PCB and the flexible conformal antenna, the collection module is connected with the PCB through a flexible wire, the flexible conformal antenna is attached to the inner surface of the silica gel shell, and the flexible conformal antenna is connected with the collection module. One side, close to the PCB, of the flexible conformal antenna is provided with a bonding pad, and the flexible conformal antenna is welded with the PCB through the bonding pad. According to the invention, the problem of unstable signal transmission caused by the influence of the human body on the antenna is solved, the distance between the human body and the antenna is increased by arranging the antenna on the inner surface of the silica gel shell, and the electromagnetic energy absorption of the human body is reduced. Furthermore, the adopted flexible conformal antenna can be attached to a curved surface or an irregular surface, and the antenna structure and the equipment form are deeply fused.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of human body signal detection, in particular to a wearable detection device based on an antenna. BACKGROUND

[0002] A conventional electrocardiogram monitor is a 12-lead large test device. Advanced technologies at home and abroad can currently realize the wearing of a human body signal monitor in front of a human body, that is, a so-called wearable electrocardiogram monitor. The human body is covered by a flexible electrode to realize two-lead or three-lead signal acquisition, and then real-time monitoring data is obtained through wireless transmission for monitoring and treatment.

[0003] The wearable electrocardiogram monitor, blood glucose monitor or temperature monitor all transmit the monitored signals through wireless signals. However, the wireless signals are affected by the surrounding conductors or human bodies with a relatively strong conductivity. The communication distance of the wearable detection device is short, which leads to a significant attenuation of the signal strength, affects the stability of the received signal, and even cannot normally transmit the signal. SUMMARY

[0004] Embodiments of the present application provide a wearable detection device based on an antenna to at least solve the problem of unstable signal transmission caused by the influence of the human body on the antenna in the related art.

[0005] In a first aspect, embodiments of the present application provide a wearable detection device based on an antenna, which comprises: a collection module, a PCB board, a flexible conformal antenna and a silica gel shell, the collection module is configured to collect human body signals; the silica gel shell is configured to encapsulate the PCB board and the flexible conformal antenna; the collection module is connected to the PCB board through a flexible wire, the flexible conformal antenna is attached to an inner surface of the silica gel shell, a side of the flexible conformal antenna close to the PCB board is provided with a solder pad, and the solder pad is soldered to the PCB board.

[0006] In some embodiments, the flexible conformal antenna comprises a flexible substrate and an antenna radiator, the flexible substrate is made of a polyimide material or a polydimethylsiloxane material, and the antenna radiator is formed on a surface of the flexible substrate by a laser direct structuring process or conductive silver paste printing.

[0007] In some embodiments, the surface of the flexible conformal antenna is covered with a non-conductive plating film.

[0008] In some embodiments, the collection module is directly embedded in the skin side of the silica gel shell; or the collection module is connected to the silica gel shell through buckling or magnetic attraction.

[0009] In a second aspect, the embodiments of the present application provide a wearable detection device based on an antenna, the device comprising: a collection module, a PCB board, a flexible conformal antenna, and a structural carrier, the collection module is configured to collect human signals; the collection module is connected to the PCB board through a flexible wire, the flexible conformal antenna is attached to one side of the structural carrier, and the PCB board is partially welded to the other side of the structural carrier.

[0010] In some embodiments, the structural carrier is a nylon bracket, a plurality of fixing columns are arranged on the nylon bracket, a plurality of holes corresponding to the positions of the fixing columns are arranged on the PCB board, and the fixing columns pass through the holes to achieve the fixed connection between the nylon bracket and the PCB board. a plurality of fixing columns are arranged on the nylon bracket, a plurality of holes corresponding to the positions of the fixing columns are arranged on the PCB board, and the fixing columns pass through the holes to achieve the fixed connection between the nylon bracket and the PCB board.

[0011] In some embodiments, the structural carrier is a battery fixing bracket, the flexible conformal antenna is attached to one side of the battery fixing bracket, and the PCB board is welded to the other side of the battery fixing bracket.

[0012] In some embodiments, the flexible conformal antenna comprises a flexible substrate and an antenna radiator, the flexible substrate is made of polyimide material or polydimethylsiloxane material, and the antenna radiator is formed on the surface of the flexible substrate by laser direct forming process or conductive silver paste printing.

[0013] In some embodiments, the surface of the flexible conformal antenna is covered with a non-conductive plating film.

[0014] In some embodiments, the device further comprises a silica gel shell, the silica gel shell is configured to encapsulate the PCB board, the flexible conformal antenna, and the structural carrier; the collection module is directly embedded in the skin side of the silica gel shell, or the collection module is connected to the silica gel shell through buckling or magnetic attraction.

[0015] Compared with the related art, the wearable detection device based on an antenna provided in the embodiment of the present application sets the antenna by means of a structure carrier inside the inner surface of the silica gel shell or the detection instrument, increases the distance between the human body and the antenna, reduces the absorption of electromagnetic energy by the human body, and solves the problem of unstable signal transmission caused by the influence of the human body on the antenna. Further, the flexible conformal antenna can be attached to a curved surface or an irregular surface, and the antenna structure and the device form are deeply integrated. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 is a structural block diagram of a wearable detection device based on an antenna according to an embodiment of the present application; Figure 2 is a structural block diagram of another wearable detection device based on an antenna according to an embodiment of the present application; Figure 3 is a schematic diagram of an antenna setting based on a nylon support according to an embodiment of the present application; Figure 4 is a traditional antenna return loss condition diagram according to an embodiment of the present application; Figure 5 is a traditional antenna radiation pattern diagram according to an embodiment of the present application; Figure 6 is a new antenna return loss condition diagram according to an embodiment of the present application; Figure 7 is a new antenna radiation pattern diagram according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is described and explained below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and do not limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0018] It is apparent that the accompanying drawings described below in the description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can be applied to other similar situations according to these drawings without creative labor. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, some design, manufacture or production changes based on the technology disclosed in the present application are only routine technical means for those skilled in the art related to the disclosure of the present application, and should not be understood as insufficient disclosure of the present application.

[0019] Reference to "an embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. It is explicitly contemplated that embodiments described herein can be combined with other embodiments in suitable combinations, even if not explicitly made such combinations.

[0020] Unless otherwise defined, technical terms or scientific terms used in the present application should be understood as their common meanings to those skilled in the art. The terms "a", "an", "one", "the", and similar terms in the present application do not represent quantity limitation, but can represent singular or plural. The terms "include", "contain", "have", and any variations thereof in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or units, but can also include steps or units not listed, or can also include other steps or units inherent to the process, method, product or device. The terms "connect", "connect", "couple" and similar terms in the present application are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The term "multiple" in the present application means two or more. The association between the associated objects is described by the term "and / or", which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The terms "first", "second", "third" and the like in the present application are only to distinguish similar objects, and do not represent a specific order of the objects.

[0021] It should be noted that the wearable detection device of the present application includes, but is not limited to, an electrocardiogram monitor, a blood glucose monitor, and a temperature monitor.

[0022] Human body can be equivalent to a frequency-varying complex impedance network at 2.4 GHz frequency band, and the impedance value is affected by tissue electrical parameters (dielectric constant ε r, conductivity σ) and distance. The traditional antenna is planarly attached on the PCB board, and is arranged in the wearable detection device and directly coupled with the human body, and various frequency signals will be significantly absorbed by the human body. In order to reduce the influence of such attenuation, the antenna is arranged in the silicone shell inner surface or the internal structure carrier of the detector, the distance between the human body and the antenna is increased, and the absorption of electromagnetic energy by the human body is reduced.

[0023] The embodiment provides a wearable detection device based on an antenna. As used below, the terms "module", "unit", "sub-unit" and the like can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementation, or a combination of software and hardware implementation is also possible and is conceived.

[0024] Figure 1 is a structural block diagram of a wearable detection device based on an antenna according to an embodiment of the present application, as shown in Figure 1 The device comprises a collection module 11, a PCB board 12, a flexible conformal antenna 13 and a silicone shell 14.

[0025] The collection module 11 is used for collecting human body signals.

[0026] Different types of wearable detection devices collect different human body signals. When the wearable detection device is an electrocardiogram monitor, the human body signal is an electrocardiogram signal; when the wearable detection device is a blood glucose monitor, the human body signal is a blood glucose signal; when the wearable detection device is a temperature monitor, the human body signal is a temperature signal.

[0027] The silicone shell 14 is used for packaging the PCB board and the flexible conformal antenna.

[0028] The silicone shell adopted in the embodiment has high elasticity, can be stretched (200%~500%), is attached to a complex curved surface, and high attachment degree can reduce motion artifacts, so that the detected human body signal is more stable. In addition, the silicone shell has low dielectric loss, and can reduce high-frequency signal attenuation.

[0029] The collection module 11 is connected to the PCB board 12 through a flexible lead wire, the flexible conformal antenna 13 is attached to the inner surface of the silicone shell 14, and the side of the flexible conformal antenna 13 close to the PCB board is provided with a solder pad, and the solder pad is soldered to the PCB board 12.

[0030] The flexible and insulating properties of the silicone are used to conform the antenna within the device housing. A metallized pad is reserved at the end of the flexible conformal antenna (near the PCB side) as an electrical interface to the PCB, and the soldering point needs to avoid the bending area of the silicone to ensure mechanical reliability. The pads of the flexible conformal antenna are fixed to the corresponding pads on the PCB while ensuring electrical conduction.

[0031] The antenna is arranged inside the silicone housing to increase the gap between the human body and the antenna and reduce the absorption of electromagnetic energy by the human body. The negative effects of the human body (high dielectric constant, conductivity) on the transmission of antenna signals are reduced through structural design and material selection.

[0032] In some embodiments, the flexible conformal antenna includes a flexible substrate made of polyimide material or polydimethylsiloxane material and an antenna radiator formed on the surface of the flexible substrate using a laser direct structuring process or conductive silver paste printing.

[0033] Traditional antennas are ceramic or other hard structures, and the present embodiment uses a flexible substrate to conform to the design according to the needs of the scene. Polyimide (PI) has high temperature resistance (up to 400°C or more), high mechanical strength, and excellent dielectric properties; polydimethylsiloxane (PDMS) has good biocompatibility, soft elasticity (similar to rubber), and chemical corrosion resistance.

[0034] The flexible conformal antenna is directly attached to the device housing or curved structure through the flexible substrate, which saves space compared to traditional antennas. The flexible material absorbs mechanical stress, and the vibration reliability is higher than that of rigid antennas.

[0035] In addition, traditional antennas (such as monopoles) often have radiation blind spots, while the flexible conformal antenna of the present application improves the antenna gain on both sides and the back, ensuring stable coverage of signals in directions prone to obstruction, achieving uniform radiation in three-dimensional space and improving the effect of antennas in all dimensions.

[0036] In some embodiments, the surface of the flexible conformal antenna is covered with a non-conductive plating film.

[0037] The human body (relative dielectric constant generally in the range of 40-52.7) forms a parasitic capacitance (1-10 pF) with the metal antenna, causing a shift in the resonant frequency (typical shift of 20-50 MHz in the 2.4 GHz band) and a decrease in efficiency.

[0038] A non-conductive coating forms an insulating layer on the surface of the metal antenna, increasing the effective distance between the human body and the antenna. According to the definition of capacitance, parasitic capacitance can be reduced by more than 60% (e.g., from 3.5 pF to 0.8 pF). In this embodiment, the non-conductive coating reduces the absorption of surface waves by the human body, blocks capacitive coupling by the human body, reconstructs the near-field distribution, and improves the antenna radiation efficiency.

[0039] In some embodiments, the acquisition module is directly embedded in the skin-contact side of the silicone shell; or the acquisition module is connected to the silicone shell by a snap-on or magnetic method.

[0040] It is directly embedded in the skin-contacting side of the silicone shell and comes into contact with the skin through medical-grade conductive adhesive (such as carbon paste or Ag / AgCl gel). The integrated design prevents the electrodes from falling off and improves wearing comfort.

[0041] The electrode module (including flexible circuitry) connects to the silicone shell via snap-fit ​​or magnetic attachment and can be replaced individually. The electrodes are detachable for cleaning or replacement, extending the lifespan of the main unit.

[0042] This embodiment also provides another antenna-based wearable detection device. Figure 2 This is a structural block diagram of another antenna-based wearable detection device according to an embodiment of this application, such as... Figure 2 As shown, the device includes: The device includes a data acquisition module 11, a PCB board 12, a flexible conformal antenna 13, and a structural carrier 15. The structural carrier 15 includes a support that supports, fixes, or protects the internal components of the wearable detection device.

[0043] The acquisition module 11 is used to acquire human body signals.

[0044] The acquisition module 11 is connected to the PCB board 12 via a flexible wire, the flexible conformal antenna 13 is attached to one side of the structural carrier 15, and the PCB board 12 is partially welded to the other side of the structural carrier 15.

[0045] In this embodiment, the antenna is moved from the PCB and placed on a structural carrier inside the device, avoiding coupling losses between the PCB ground plane and nearby conductors. The structural design reduces the negative impact of the human body (high dielectric constant, conductivity) on antenna signal transmission.

[0046] In some embodiments, the structural carrier is a nylon support. The nylon bracket has multiple fixing posts, and the PCB board has holes corresponding to the positions of the fixing posts. The fixing posts pass through the holes to achieve a fixed connection between the nylon bracket and the PCB board. The nylon bracket is also equipped with welding points, and the PCB board is equipped with solder pads. After the nylon bracket is fixed to the PCB board by the fixing posts, the welding points of the nylon bracket and the solder pads of the PCB board are welded together.

[0047] The dielectric constant and loss tangent of nylon are close to high-frequency PCB substrates (such as FR4), which can reduce the loss of antenna efficiency. The flexible conformal antenna is attached to the nylon bracket, and there is a contact between the flexible conformal antenna and the PCB. Figure 3 Figure 1 is a schematic diagram of an antenna based on a nylon bracket according to an embodiment of the present application. Figure 3 As shown in Figure 1, the nylon bracket is fixed to the PCB through three fixing columns, and is partially welded to the PCB.

[0048] Optionally, an enlarged contact pad is designed at the end of the flexible antenna, and a gold-plated pad is arranged at the corresponding position of the PCB. The flexible conformal antenna and the PCB are welded.

[0049] Alternatively, the flexible conformal antenna extends out a metallized via contact, and a spring contact module is installed at the corresponding position on the PCB. The battery bracket is locked to the PCB with a nylon screw, to ensure that the compression amount of the spring contact reaches the rated value, and an insulating gasket is added to prevent short circuit.

[0050] The present embodiment sets the antenna by means of the nylon bracket, increases the gap between the human body and the antenna, and reduces the absorption of electromagnetic energy by the human body.

[0051] In some embodiments, the structural carrier is a battery fixing bracket, the flexible conformal antenna is attached to one side of the battery fixing bracket, and the PCB is welded to the other side of the battery fixing bracket.

[0052] The flexible conformal antenna is attached to the surface of the battery fixing bracket, and a flexible FPC reflector is attached to the surface of the battery shell or the battery shell is used as a reflector, to enhance directional radiation.

[0053] The present embodiment sets the antenna by means of the battery fixing bracket, increases the gap between the human body and the antenna, and reduces the absorption of electromagnetic energy by the human body.

[0054] In some embodiments, the flexible conformal antenna includes a flexible substrate and an antenna radiator. The flexible substrate is made of polyimide material or polydimethylsiloxane material, and the antenna radiator is formed on the surface of the flexible substrate by laser direct structuring process or conductive silver paste printing.

[0055] The conventional antenna is made of ceramic or other hard structure. In the present embodiment, a flexible substrate is used, and the conformal design can be performed according to the required scene. Polyimide (PI) has high temperature resistance (up to more than 400°C), high mechanical strength, and excellent dielectric properties; polydimethylsiloxane (PDMS) has good biocompatibility, soft elasticity (similar to rubber), and chemical corrosion resistance.

[0056] The flexible conformal antenna is directly attached to the device shell or curved structure through a flexible substrate, thereby saving space compared to a traditional antenna. The flexible material absorbs mechanical stress, and the vibration reliability is higher than that of a rigid antenna.

[0057] In addition, the traditional antenna (such as a monopole) often has a radiation blind area, while the flexible conformal antenna of the present application improves the antenna gain on the left and right sides and the back, ensures stable coverage of signals in directions prone to shielding, and realizes uniform radiation in three-dimensional space, thereby improving the effect of the antenna in all dimensions.

[0058] In some embodiments, the flexible conformal antenna is coated with a non-conductive coating.

[0059] The human body (with a relative dielectric constant generally in the range of 40-52.7) forms a parasitic capacitance (1-10 pF) with the metal antenna, resulting in a shift in the resonant frequency (a typical shift of 20-50 MHz in the 2.4 GHz frequency band) and a decrease in efficiency.

[0060] The non-conductive coating forms an insulating layer on the surface of the metal antenna, increasing the effective distance between the human body and the antenna. According to the definition of capacitance, the parasitic capacitance can be reduced by more than 60% (for example, from 3.5 pF to 0.8 pF). The present embodiment reduces the absorption of surface waves by the human body through non-conductive coating, blocks capacitive coupling of the human body, reconfigures the near-field distribution, and improves the radiation efficiency of the antenna.

[0061] In some embodiments, the wearable detection device further includes a silicone shell for packaging the PCB board, the flexible conformal antenna, and the structural carrier.

[0062] The present embodiment uses a silicone shell, which has high elasticity and can be stretched (200%-500%), and is suitable for complex curved surfaces. High adhesion can reduce motion artifacts, making the human body signal more stable. The silicone shell has low dielectric loss, which can reduce high-frequency signal attenuation.

[0063] The acquisition module is directly embedded in the skin side of the silicone shell, or the acquisition module is connected to the silicone shell through buckling or magnetic attraction.

[0064] The acquisition module is directly embedded in the skin side of the silicone shell, and is in contact with the skin through a medical-grade conductive adhesive (such as carbon paste or Ag / AgCl gel). The integrated design avoids electrode detachment and improves wear comfort.

[0065] The electrode module (including a flexible circuit) is connected to the silicone shell through buckling or magnetic attraction, and can be replaced separately. The electrodes can be detached, cleaned, or replaced, thereby prolonging the service life of the main body.

[0066] Further, the human body load will cause impedance shift (e.g., shift to 23-j37Ω, while 50Ω is the standard), for which the embodiment adds a π-type matching network (optionally, L=1-3.9nH, C=0-1.2pF, C=0-2.4pF) for PCB matching optimization.

[0067] The performance of the traditional antenna and the improved new antenna according to the embodiment of the application is tested and verified. Based on the Bluetooth 2.4GHz-2.5GHz frequency band, the wearable electrocardiogram detector is worn on the mannequin. Table 1 is a performance index comparison table of an antenna according to an embodiment of the application. Figure 4 is a return loss chart of a traditional antenna according to an embodiment of the application, Figure 5 is a radiation pattern of a traditional antenna according to an embodiment of the application, Figure 6 is a return loss chart of a new antenna according to an embodiment of the application, Figure 7 is a radiation pattern of a new antenna according to an embodiment of the application. Table 2 is an antenna gain test result table of a traditional antenna according to an embodiment of the application, Table 3 is an antenna efficiency test result table of a traditional antenna according to an embodiment of the application, and Table 4 is an antenna gain and efficiency test result table of a new antenna according to an embodiment of the application.

[0068] Table 1

[0069] Table 2

[0070] Table 3

[0071] Table 4

[0072] Further, based on the Bluetooth 2.4GHz-2.5GHz frequency band, the device is worn on the real human body in different environments for testing. Table 5 is a different environment test result comparison table according to an embodiment of the application.

[0073] Table 5

[0074] It should be noted that each of the above modules can be a functional module or a program module, which can be implemented by software or hardware. For the modules implemented by hardware, each of the above modules can be located in the same processor; or each of the above modules can also be located in different processors in any combination.

[0075] Those skilled in the art should understand that each technical feature of the above-described embodiments can be combined arbitrarily, and for the sake of brevity, each technical feature of the above-described embodiments is not described in all possible combinations, however, as long as the combinations of the technical features do not exist, it should be considered that it is within the scope of the description.

[0076] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An antenna-based wearable detection device, comprising: The device comprises: a collection module, a PCB board, a flexible conformal antenna, and a silica gel shell, the collection module is used for collecting human body signals; the silica gel shell is used for packaging the PCB board and the flexible conformal antenna; the collection module is connected with the PCB board through flexible wires, the flexible conformal antenna is attached to the inner surface of the silica gel shell, and the side of the flexible conformal antenna close to the PCB board is provided with a solder pad for welding with the PCB board.

2. The apparatus of claim 1, wherein, The flexible conformal antenna comprises a flexible substrate and an antenna radiator, the flexible substrate is made of polyimide material or polydimethylsiloxane material, and the antenna radiator is formed on the surface of the flexible substrate through a laser direct forming process or conductive silver paste printing.

3. The apparatus of claim 1, wherein, The surface of the flexible conformal antenna is covered with a non-conductive plating film.

4. The apparatus of claim 1, wherein, The collection module is directly embedded in the skin side of the silica gel shell; or The collection module is connected with the silica gel shell through buckling or magnetic attraction.

5. An antenna-based wearable detection device, comprising: The device comprises: a collection module, a PCB board, a flexible conformal antenna, and a structural carrier, the structural carrier comprises a support for supporting, fixing or protecting internal devices of the wearable detection device, the collection module is used for collecting human body signals; the collection module is connected with the PCB board through flexible wires, the flexible conformal antenna is attached to one side of the structural carrier, and the PCB board is partially welded with the other side of the structural carrier.

6. The apparatus of claim 5, wherein, The structural carrier is a nylon support, a plurality of fixing columns are arranged on the nylon support, a plurality of holes corresponding to the positions of the fixing columns are arranged on the PCB board, and the fixing columns pass through the holes to realize the fixed connection between the nylon support and the PCB board; a solder pad is further arranged on the nylon support, and after the nylon support is fixed with the PCB board through the fixing columns, the nylon support is welded with the PCB board through the solder pad.

7. The apparatus of claim 5, wherein, The structural carrier is a battery fixing frame, the flexible conformal antenna is attached to one side of the battery fixing frame, and the PCB board is welded with the other side of the battery fixing frame.

8. The apparatus of claim 5, wherein, The flexible conformal antenna comprises a flexible substrate and an antenna radiator, the flexible substrate is made of polyimide material or polydimethylsiloxane material, and the antenna radiator is formed on the surface of the flexible substrate through a laser direct forming process or conductive silver paste printing.

9. The apparatus of claim 5, wherein, The surface of the flexible conformal antenna is covered with a non-conductive plating film.

10. The apparatus of claim 5, wherein, The device further comprises a silica gel shell, the silica gel shell is used for packaging the PCB board, the flexible conformal antenna and the structural carrier; the collection module is directly embedded in the skin side of the silica gel shell, or the collection module is connected with the silica gel shell through buckling or magnetic attraction.

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