Electronic equipment and object detection method

Abstract

An embodiment of the present application provides an electronic device, including a detection antenna, a communication antenna, a radio frequency module and a selection switch. The detection antenna includes at least one circle of metal coil, and the communication antenna supports the reception and transmission of electromagnetic wave signals in a preset frequency band. The selection switch is electrically connected between the detection antenna, the communication antenna and the radio frequency module, and is used to select the connection between the radio frequency module and the detection antenna or the communication antenna. When the selection switch establishes the connection between the radio frequency module and the detection antenna, the radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to detect objects. The present application also provides an object detection method. The present application can realize the object detection function with lower cost and simpler structure.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an object detection method and electronic equipment for detecting objects through communication technology. Background Art

[0002] At present, mobile phones and other electronic devices have more and more functions and have become important tools for people's daily life. In some cases, people are troubled by peeping cameras when staying in hotels. One of the current detection methods is to turn on the camera of the mobile phone to take pictures for investigation. However, this method is often not necessarily accurate. In some cases, people have more and more types of electronic devices. Therefore, it is often difficult to find some electronic products, especially when the mobile phone is in silent mode, it is difficult to find it by making a phone call. Summary of the invention

[0003] The present application provides an electronic device and an object detection method to solve the above problems.

[0004] In a first aspect, an electronic device is provided, comprising a detection antenna, a communication antenna, a radio frequency module and a selection switch. The detection antenna comprises at least one metal coil, and the communication antenna supports the reception and transmission of electromagnetic wave signals in a preset frequency band. The selection switch is electrically connected between the detection antenna, the communication antenna and the radio frequency module, and is used to select the connection between the radio frequency module and the detection antenna or the communication antenna. When the selection switch establishes the connection between the radio frequency module and the detection antenna, the radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to detect objects.

[0005] In a second aspect, a method for detecting an object is also provided, which is applied to an electronic device, and comprises: responding to a detection start operation, controlling a selection switch to establish a connection between a radio frequency module and a detection antenna; and receiving an electromagnetic wave signal within a preset frequency range through the detection antenna by the radio frequency module to perform object detection.

[0006] The electronic device and object detection method of the present application, when it is necessary to detect a specific object, can establish a connection between the RF module and the detection antenna through the selection switch, and the RF module receives electromagnetic wave signals within a preset frequency range through the detection antenna. The electromagnetic wave signals currently received within the preset frequency range can reflect whether there are specific objects around, and the object detection function can be realized. In addition, the electronic device of the present application, through the selection switch, the detection antenna can share the RF module with the communication antenna, and can choose to establish a connection between the RF module and the detection antenna or the communication antenna as needed, thereby effectively saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0008] Figure 1 This is a structural block diagram of an electronic device in some embodiments of the present application.

[0009] Figure 2 It is a simple structural schematic diagram of the detection antenna in some embodiments of the present application.

[0010] Figure 3 This is a further structural block diagram of an electronic device in some embodiments of the present application.

[0011] Figure 4 This is another structural block diagram of an electronic device in some embodiments of the present application.

[0012] Figure 5 This is yet another structural block diagram of an electronic device in some embodiments of the present application.

[0013] Figure 6 It is a schematic plan view of an electronic device in some embodiments of the present application.

[0014] Figure 7 Another schematic plan view of an electronic device in some embodiments of the present application.

[0015] Figure 8 This is a further structural block diagram of an electronic device in some embodiments of the present application.

[0016] Fig. 9 This is a flow chart of an object detection method in some embodiments of the present application.

[0017] Fig.10 Another flow chart of the object detection method in some embodiments of the present application. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "thickness", "width", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than implying or indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "connection" in this application, unless otherwise specified, mainly refers to a physical structural connection, and may also include electrical connection, direct connection or indirect connection, etc., if specified. In the description of the embodiments of the present invention, the terms "first", "second", etc. are not specific, but are used to distinguish objects with the same name. If specified in the specification, the objects with the same name referred to by the terms "first", "second", etc. may be the same objects.

[0020] Please also read Figure 1 and Figure 2 , Figure 1 This is a structural block diagram of an electronic device 100 in some embodiments of the present application. Figure 2 Schematic diagram of the simple structure of the detection antenna 1 in some embodiments of the present application. Figure 1 As shown, the electronic device 100 includes a detection antenna 1, a communication antenna 2, a radio frequency module 3 and a selection switch 4. The detection antenna 1 includes at least one circle of metal coil 11, and the communication antenna 2 supports the reception and transmission of electromagnetic wave signals in a preset frequency band. The selection switch 4 is electrically connected between the detection antenna 1, the communication antenna 2 and the radio frequency module 3, and is used to select the connection between the radio frequency module 3 and the detection antenna 1 or the communication antenna 2; when the selection switch 4 establishes the connection between the radio frequency module 3 and the detection antenna 1, the radio frequency module 3 receives the electromagnetic wave signal within the preset frequency range through the detection antenna 1 to detect objects.

[0021] Among them, the items to be searched or detected in the present application are electronic products. Generally speaking, the electronic products to be detected will be in a networked communication state, and generally speaking, the communication frequency band of the electronic products to be detected will be in a specific frequency band within a preset frequency range. Therefore, in the present application, the electromagnetic wave signal within the preset frequency range can be received by the detection antenna 1. Therefore, when the selection switch 4 establishes a connection between the radio frequency module 3 and the detection antenna 1, the radio frequency module 3 receives the electromagnetic wave signal within the preset frequency range through the detection antenna 1, and the detection antenna 1 includes at least one circle of metal coil 11 to form a structure similar to an NFC (Near Field communication) antenna. Therefore, the closer the detection antenna 1 is to the electronic product to be detected, the stronger the signal will be. Therefore, the electromagnetic wave signal currently received within the preset frequency range can reflect whether there are specific items around, and the item detection function can be realized. In addition, in the present application, through the selection switch 4, the detection antenna 1 can share the radio frequency module 3 with the communication antenna 2, and the connection between the radio frequency module 3 and the detection antenna 1 or the communication antenna 2 can be selected as needed, thereby effectively saving costs. Therefore, on the whole, the present application can realize the object detection function with a lower cost and a simpler structure.

[0022] Among them, Figure 2 As shown, the detection antenna 1 is illustrated by taking a metal coil 11 with about two turns as an example. Obviously, the detection antenna 1 can also be close to one turn, or three turns, four turns, etc., as long as it can form a structure similar to the NFC antenna. That is, the at least one turn of the metal coil 11 in the present application can be a metal coil with one turn or close to one turn, or a metal coil with more than one turn.

[0023] In some embodiments, the at least one metal coil 11 may be formed by winding a metal conductor wrapped with an insulating layer. In some embodiments, the at least one metal coil 11 may also be formed by winding an FPC (Flexible Printed Circuit). In some embodiments, the at least one metal coil 11 may also be formed by winding a bare metal conductor, and two adjacent metal conductors are filled with insulating materials for isolation.

[0024] in, Figure 2 In the figure, the shape of each circle of the at least one circle of metal coil 11 is square. Obviously, the shape of each circle of the at least one circle of metal coil 11 can also be any shape such as circle or ellipse.

[0025] In some embodiments, when the selection switch 4 establishes a connection between the RF module 3 and the detection antenna 1, when the RF module 3 receives an electromagnetic wave signal within a preset frequency range through the detection antenna 1, the RF module 3 processes the electromagnetic wave signal within the preset frequency range to obtain a processed signal, and the processed signal is used for object detection.

[0026] That is, in some embodiments, the RF module 3 receives the electromagnetic wave signal within a preset frequency range through the detection antenna 1 to perform object detection, which may mean that the RF module 3 processes the electromagnetic wave signal within the preset frequency range to obtain the processed signal for object detection.

[0027] Furthermore, after receiving the electromagnetic wave signal within the preset frequency range, the RF module 3 can process the electromagnetic wave signal within the preset frequency range to obtain a processed signal. Based on the processed signal, object detection can be performed to realize the object detection function.

[0028] In some embodiments, when the selection switch 4 establishes a connection between the communication antenna 2 and the RF module 3, the RF module 3 receives and / or transmits electromagnetic wave signals of a preset frequency band through the communication antenna 2 to realize the communication function of the preset frequency band.

[0029] Thus, in some embodiments, when the selection switch 4 establishes a connection between the communication antenna 2 and the RF module 3, the normal communication function of the preset frequency band can be realized. Thus, in the present application, when object detection is required, the connection between the RF module 3 and the detection antenna 1 can be established through the selection switch 4, and the object detection can be performed through the detection antenna 1, and when object detection is not required, the connection between the communication antenna 2 and the RF module 3 can be established through the selection switch 4, and the communication function of the preset frequency band in the electronic device 100 can be realized, so that the hardware structure such as the RF module 3 can be shared to meet various needs, and the communication function of the preset frequency band is not affected in normal times, and the normal use of the electronic device 100 is not affected.

[0030] In some embodiments, the electrical length of the detection antenna 1 satisfies that the frequency band supported by the detection antenna 1 can cover the preset frequency range, and the electrical length of the communication antenna 2 satisfies that the communication antenna 2 can support the preset frequency band.

[0031] In some embodiments, the electrical length of the detection antenna 1 may be the electrical length of the detection antenna 1 itself, for example, approximately equal to the physical length of the detection antenna 1, that is, approximately equal to the length of at least one circle of metal coil 11 included in the detection antenna 1; the electrical length of the communication antenna 2 may also be the electrical length of the communication antenna 2 itself, for example, approximately equal to the physical length of the communication antenna 2. In some embodiments, when the detection antenna 1 and the communication antenna 2 are electrically connected with a matching tuning unit, the electrical length of the detection antenna 1 may be the equivalent electrical length of the detection antenna 1 under the matching tuning of the corresponding matching tuning unit, and the electrical length of the communication antenna 2 may also be the equivalent electrical length of the communication antenna 2 under the matching tuning of the corresponding matching tuning unit.

[0032] The structure of the communication antenna 2 is not limited, and it can be any form of antenna that can transmit and receive electromagnetic wave signals in a preset frequency band.

[0033] See also Figure 3 , is a further structural block diagram of the electronic device 100 in some embodiments of the present application. Figure 3 As shown, the electronic device 100 also includes a matching tuning unit 5 , which is connected between the detection antenna 1 , the communication antenna 2 and the radio frequency module 3 , and is used for matching and tuning the detection antenna 1 and the communication antenna 2 .

[0034] That is, in some embodiments, the detection antenna 1 and the communication antenna 2 may also be electrically connected to the matching tuning unit 5, and the electrical length of the detection antenna 1 may be the equivalent electrical length of the detection antenna 1 under the matching tuning of the corresponding matching tuning unit, and the electrical length of the communication antenna 2 may also be the equivalent electrical length of the communication antenna 2 under the matching tuning of the corresponding matching tuning unit.

[0035] Among them, when the selection switch 4 establishes a connection between the RF module 3 and the detection antenna 1, the detection antenna 1 supports receiving electromagnetic wave signals within the preset frequency range under the matching tuning of the matching tuning unit 5, and when the selection switch 4 establishes a connection between the communication antenna 2 and the RF module 3, the communication antenna 2 supports receiving and sending electromagnetic wave signals in the preset frequency band under the matching tuning of the matching tuning unit 5.

[0036] Thus, in some embodiments, the matching tuning unit 5 can realize the matching tuning of the detection antenna 1 and the communication antenna 2, so that the detection antenna 1 can at least support the reception of electromagnetic wave signals within a preset frequency range, and the communication antenna 2 can support the transmission and reception of electromagnetic wave signals in a preset frequency band. In addition, due to the matching tuning unit 5, the physical lengths of the detection antenna 1 and the communication antenna 2 do not need to be the corresponding electrical lengths, and the physical lengths of the detection antenna 1 and the communication antenna 2 can be set more flexibly according to the space of the electronic device 100.

[0037] in, Figure 3 In the figure, the matching tuning unit 5 is connected between the selection switch 4 and the RF module 3 as an example. That is, in some embodiments, the aforementioned selection switch 4 is electrically connected between the detection antenna 1, the communication antenna 2 and the RF module 3, and the selection switch 4 can be electrically connected between the detection antenna 1, the communication antenna 2 and the matching tuning unit 5, and is electrically connected to the RF module 3 through the matching tuning unit 5, so as to be electrically connected between the detection antenna 1, the communication antenna 2 and the RF module 3. The selection switch establishes the connection between the RF module 3 and the detection antenna 1, which can be by establishing the connection between the detection antenna 1 and the matching tuning unit 5, and then electrically connecting to the RF module 3 through the matching tuning unit 5. At this time, the matching tuning unit 5 can be located in the path between the detection antenna 1 and the RF module 3, and plays a matching tuning role for the detection antenna 1. Correspondingly, the selection switch establishes the connection between the RF module 3 and the communication antenna 2 by establishing the connection between the communication antenna 2 and the matching tuning unit 5, and then electrically connects the RF module 3 through the matching tuning unit 5. At this time, the matching tuning unit 5 can be located in the path between the communication antenna 2 and the RF module 3, and plays a matching tuning role for the communication antenna 2.

[0038] Obviously, in some embodiments, the matching tuning unit 5 may also be connected between the detection antenna 1 , the communication antenna 2 and the selection switch 4 .

[0039] See also Figure 4 , is another structural block diagram of the electronic device 100 in some embodiments of the present application. In some embodiments, as Figure 4As shown, the matching tuning unit 5 includes a first matching tuning subunit 51 and a second matching tuning subunit 52, the first matching tuning subunit 51 is electrically connected between the selection switch 4 and the RF module 3, the second matching tuning subunit 52 is electrically connected between the selection switch 4 and the detection antenna 1, the selection switch 4 is electrically connected between the first matching tuning subunit 51, the second matching tuning subunit 52 and the communication antenna 2, the selection switch 4 is electrically connected to the RF module 3 through the first matching tuning subunit 51, and is electrically connected to the detection antenna 1 through the second matching tuning subunit 52. Among them, when the selection switch 4 establishes a connection between the RF module 3 and the detection antenna 1, the detection antenna 1 supports receiving electromagnetic wave signals within the preset frequency range under the matching tuning of the first matching tuning subunit 51 and the second matching tuning subunit 52, and when the selection switch 4 establishes a connection between the communication antenna 2 and the RF module 3, the communication antenna 2 supports receiving and transmitting electromagnetic wave signals in the preset frequency band under the matching tuning of the first matching tuning subunit 51.

[0040] That is, in some embodiments, the matching tuning unit 5 includes two matching tuning subunits, a first matching tuning subunit 51 and a second matching tuning subunit 52, and the first matching tuning subunit 51 is electrically connected between the selection switch 4 and the RF module 3, and the second matching tuning subunit 52 is electrically connected between the selection switch 4 and the detection antenna 1. The selection switch 4 is electrically connected between the first matching tuning subunit 51, the second matching tuning subunit 52 and the communication antenna 2, and the selection switch 4 is electrically connected to the RF module 3 through the first matching tuning subunit 51, and is electrically connected to the detection antenna 1 through the second matching tuning subunit 52, thereby being electrically connected between the detection antenna 1, the communication antenna 2 and the RF module 3. Among them, the selection switch 4 selects to establish the connection between the RF module 3 and the detection antenna 1, and can be selected to establish the connection between the first matching tuning subunit 51 and the second matching tuning subunit 52, so that the RF module 3 is electrically connected to the detection antenna 1 through the first matching tuning subunit 51 and the second matching tuning subunit 52, and the RF module 3 is electrically connected to the detection antenna 1, and at this time, the first matching tuning subunit 51 and the second matching tuning subunit 52 are located in the passage between the RF module 3 and the detection antenna 1, and the detection antenna 1 is matched and tuned at the same time. Correspondingly, the selection switch establishes the connection between the RF module 3 and the communication antenna 2, and can select to establish the connection between the first matching tuning subunit 51 and the communication antenna 2, so that the RF module 3 is electrically connected to the communication antenna 2 through the first matching tuning subunit 51, and the RF module 3 is electrically connected to the communication antenna 2, and at this time, the first matching tuning subunit 51 is located in the path between the RF module 3 and the communication antenna 2, and the communication antenna 2 is matched and tuned.

[0041] That is, in some embodiments, the matching tuning unit 5 includes two matching tuning sub-units, a first matching tuning sub-unit 51 and a second matching tuning sub-unit 52, and the first matching tuning sub-unit 51 is used to match and tune the communication antenna 2, and the first matching tuning sub-unit 51 and the second matching tuning sub-unit 52 are jointly used to match and tune the detection antenna 1.

[0042] Thus, in some embodiments, the first matching tuning subunit 51 is used to match and tune the communication antenna 2, and the first matching tuning subunit 51 and the second matching tuning subunit 52 are jointly used to match and tune the detection antenna 1. The first matching tuning subunit 51 can be shared by the detection antenna 1 and the communication antenna 2. Therefore, the number of matching elements required for the matching tuning of the detection antenna 1 and the communication antenna 2 can be reduced, which is conducive to cost saving.

[0043] See also Figure 5 , is another structural block diagram of the electronic device 100 in some embodiments of the present application. In some embodiments, Figure 5 As shown, the matching and tuning unit 5 includes a first matching and tuning subunit 51 and a second matching and tuning subunit 52, wherein the first matching and tuning subunit 51 is electrically connected between the selection switch 4 and the communication antenna 2, and the second matching and tuning subunit 52 is electrically connected between the selection switch 4 and the detection antenna 1. The selection switch 4 is electrically connected between the first matching and tuning subunit 51, the second matching and tuning subunit 52 and the communication antenna 2, and the selection switch 4 is electrically connected to the communication antenna 2 through the first matching and tuning subunit 51, and is electrically connected to the detection antenna 1 through the second matching and tuning subunit 52. When the selection switch 4 establishes a connection between the RF module 3 and the detection antenna 1, the detection antenna 1 supports receiving electromagnetic wave signals within the preset frequency range under the matching and tuning of the second matching and tuning subunit 52, and when the selection switch 4 establishes a connection between the communication antenna 2 and the RF module 3, the communication antenna 2 supports the transmission and reception of electromagnetic wave signals within the preset frequency band under the matching and tuning of the first matching and tuning subunit 51.

[0044] That is, in some embodiments, the matching tuning unit 5 includes two matching tuning subunits, a first matching tuning subunit 51 and a second matching tuning subunit 52, and the first matching tuning subunit 51 is electrically connected between the selection switch 4 and the communication antenna 2, the second matching tuning subunit 52 is electrically connected between the selection switch 4 and the detection antenna 1, the selection switch 4 is electrically connected between the first matching tuning subunit 51, the second matching tuning subunit 52 and the communication antenna 2, the selection switch 4 is electrically connected to the communication antenna 2 through the first matching tuning subunit 51, and is electrically connected to the detection antenna 1 through the second matching tuning subunit 52, thereby being electrically connected between the detection antenna 1, the communication antenna 2 and the RF module 3. Among them, the selection switch 4 selects to establish the connection between the RF module 3 and the detection antenna 1, which can be to select to establish the connection between the second matching tuning subunit 52 and the RF module 3, so that the RF module 3 is electrically connected to the detection antenna 1 through the second matching tuning subunit 52, and the second matching tuning subunit 52 is located in the path between the RF module 3 and the detection antenna 1, and the detection antenna 1 is matched and tuned. Correspondingly, the selection switch establishes the connection between the RF module 3 and the communication antenna 2, which can be to select to establish the connection between the first matching tuning subunit 51 and the RF module 3, so that the RF module 3 is electrically connected to the communication antenna 2 through the first matching tuning subunit 51, and the communication antenna 2 is matched and tuned. At this time, the first matching tuning subunit 51 is located in the path between the RF module 3 and the communication antenna 2, and the communication antenna 2 is matched and tuned.

[0045] That is, in some embodiments, the matching tuning unit 5 includes two matching tuning subunits, a first matching tuning subunit 51 and a second matching tuning subunit 52, and the first matching tuning subunit 51 is used to match and tune the communication antenna 2, and the second matching tuning subunit 52 is used to match and tune the detection antenna 1.

[0046] Therefore, in some embodiments, the communication antenna 2 and the detection antenna 1 use their own independent matching tuning subunits to achieve matching tuning, and can design corresponding matching tuning subunits according to their respective needs, which is more flexible. When one of the matching tuning subunits fails, it will not affect the other matching tuning subunit, thereby improving the reliability of the work.

[0047] Obviously, Figure 4 and Figure 5 These are just some examples, and the matching and tuning unit 5 may also include other structures and connection modes.

[0048] In some embodiments, the matching tuning unit 5, the first matching tuning subunit 51 and the second matching tuning subunit 52 may simultaneously include a matching circuit and a tuning circuit, wherein the matching circuit is used to achieve impedance matching, and the tuning circuit is used to achieve tuning, so that the detection antenna 1 and the communication antenna 2 can support operation within a corresponding frequency range or frequency band.

[0049] In some embodiments, the matching tuning unit 5, the first matching tuning subunit 51, the second matching tuning subunit 52, etc. may include a plurality of capacitors and / or inductors to achieve corresponding matching tuning. For example, the matching tuning unit 5, the first matching tuning subunit 51, the second matching tuning subunit 52, etc. may include an inductor and a capacitor connected in parallel, or an inductor and a capacitor connected in series, or a structure in which an inductor and a capacitor are connected in parallel and then connected in series with an inductor or a capacitor, or a structure in which a series branch of a capacitor and an inductor are connected in series with a capacitor or / inductor in parallel, etc.

[0050] In some embodiments, Figure 1-Figure 5 As shown, the selection switch 4 is a single-pole double-throw switch, including a free end 4a, a first fixed end 4b and a second fixed end 4c, the free end 4a is electrically connected to the RF module 3, the first fixed end 4b is electrically connected to the communication antenna 2, and the second fixed end 4c is electrically connected to the detection antenna 1, and the free end 4a can be selectively connected to the first free end 4b or to the second free end 4c, and the connection between the RF module 3 and the detection antenna 1 or the communication antenna 2 is selected.

[0051] That is, in some embodiments, the selection switch 4 may be a single-pole double-throw switch, and the single-pole double-throw switch may be used to selectively establish a connection between the RF module 3 and the detection antenna 1 or the communication antenna 2 .

[0052] In some embodiments, when the electronic device 100 further includes: Figure 3 When the matching tuning unit 5 is shown, Figure 3 As shown, the free end 4 a can be electrically connected to the matching tuning unit 5 , thereby being electrically connected to the RF module 3 through the matching tuning unit 5 .

[0053] In some embodiments, Figure 4 As shown, when the electronic device 100 further includes Figure 4When the first matching tuning subunit 51 and the second matching tuning subunit 52 are shown, the free end 4a can be electrically connected to the first matching tuning subunit 51 and to the RF module 3 through the first matching tuning subunit 51, the first fixed end 4b is electrically connected to the communication antenna 2, and the second fixed end 4c is electrically connected to the second matching tuning subunit 52, and is electrically connected to the detection antenna 1 through the second matching tuning subunit 52.

[0054] In some embodiments, Figure 5 As shown, when the electronic device 100 further includes Figure 5 When the first matching tuning subunit 51 and the second matching tuning subunit 52 are shown, the free end 4a can be electrically connected to the RF module 3, the first fixed end 4b is connected to the first matching tuning subunit 51, and is electrically connected to the communication antenna 2 through the first matching tuning subunit 51, and the second fixed end 4c is electrically connected to the second matching tuning subunit 52, and is electrically connected to the detection antenna 1 through the second matching tuning subunit 52.

[0055] Please return to Figure 2 ,like Figure 2 As shown, the at least one circle of metal coil 11 includes a feeding end 11a and a grounding end 11b, the selection switch 4 is electrically connected between the feeding end 11a of the detection antenna 1, the communication antenna 2 and the RF module 3, and the grounding end 11b is used for grounding, that is, the grounding end 11b is connected to the ground GND and is grounded.

[0056] That is, in some embodiments, the two ends of the at least one circle of metal coil 11, that is, the two ends are the feeding end 11a and the grounding end 11b respectively. The selection switch 4 is electrically connected to the detection antenna 1, specifically to the feeding end 11a of the detection antenna 1. The selection switch 4 establishes a connection between the RF module 3 and the detection antenna 1, specifically to establish a connection between the RF module 3 and the feeding end 11a of the detection antenna 1. Among them, when the RF module 3 is connected to the feeding end 11a of the detection antenna 1, since the grounding end 11b of the detection antenna 1 is grounded, a current loop is formed, and an effect similar to an NFC antenna can be achieved.

[0057] See also Figure 6 , which is a plan view of an electronic device 100 in some embodiments of the present application.

[0058] In some embodiments, Figure 6As shown, the electronic device 100 further includes an NFC antenna 6, and the NFC antenna 6 includes a multi-turn NFC coil 61. In some embodiments, the at least one turn of the metal coil 11 included in the detection antenna 1 is at least one turn of the NFC coil.

[0059] That is, in some embodiments, the electronic device 100 further includes an NFC antenna 6, and the NFC antenna 6 is used for near field communication, for example, for implementing near field communication functions such as access control cards and subway cards. The detection antenna 1 may be a part of the structure shared by the NFC antenna 6, that is, at least one circle of metal coil 11 included in the detection antenna 1 is at least one circle of coil in the NFC coil 61.

[0060] The detection antenna 1 may be any suitable section of the NFC coil 61 that is more than one turn or close to one turn. That is, the at least one turn coil in the present application may be a one turn coil or close to one turn coil, or a coil that is more than one turn.

[0061] Therefore, by sharing the NFC coil 61 of the NFC antenna 6 as the detection antenna 1, there is no need to separately set up the detection antenna 1, which can effectively save space and reduce costs.

[0062] In some embodiments, the at least one metal coil 11 included in the detection antenna 1 is at least one coil between the first target position P1 and the second target position P2 in the NFC coil 61, the first target position P1 is used to be electrically connected to the selection switch 4 and serve as a feeding terminal 11a, and the second target position P2 is used for grounding and serves as a grounding terminal 11b.

[0063] That is, in some embodiments, two target positions may be selected in the NFC coil 61 as the feeding end 11 a and the ground end 11 b of the detection antenna 1 , respectively, so that part of the coil of the NFC coil 61 is shared as the detection antenna 1 .

[0064] The two ends of the NFC coil 61, i.e., the two ends, are also the feeding end 61a and the grounding end 61b. In some embodiments, the feeding end 11a of the detection antenna 1 can be at the same position as the feeding end 61a of the NFC coil 61, and the grounding end 11b of the detection antenna 1 can be located at a position more than one circle away from the feeding end 61a / 11a. That is, the detection antenna 1 and the NFC coil 61 can share the feeding end, the first target position P1 can be the position where the feeding end 61a of the NFC coil 61 is located, and the second target position P2 is a position more than one circle away from the feeding end 61a. In some embodiments, the grounding end 11b of the detection antenna 1 can be at the same position as the grounding end 61b of the NFC coil 61, and the feeding end 11a of the detection antenna 1 can be located at a position more than one circle away from the grounding end 61b. That is, the detection antenna 1 and the NFC coil 61 may share a ground terminal, the second target position P2 may be the position where the ground terminal 61b of the NFC coil 61 is located, and the first target position P1 is a position more than one circle away from the ground terminal 61b. In some embodiments, the feeding terminal 11a and the ground terminal 11b of the detection antenna 1 are located outside the feeding terminal 61a and the ground terminal 61b of the NFC coil 61, that is, the first target position P1 and the second target position P2 in the NFC coil 61 are outside the feeding terminal 61a and the ground terminal 61b of the NFC coil 61. At this time, the detection antenna 1 and the NFC coil 61 do not share a feeding terminal or a ground terminal.

[0065] See also Figure 7 , is another plan schematic diagram of the electronic device 100 in some embodiments of the present application.

[0066] In some embodiments, as described above, the electronic device 100 further includes an NFC antenna 6, and the NFC antenna 6 includes a multi-turn NFC coil 61. Figure 7 As shown, there is a gap X0 between two adjacent coils 61 , and the at least one metal coil 11 included in the detection antenna 1 is located in the gap X0 of the multiple-turn NFC coil 61 .

[0067] That is, in some embodiments, the NFC antenna 6 includes a multi-turn NFC coil 61, and a gap X0 is provided between two adjacent turns of the coil 61. The at least one turn of the metal coil 11 included in the detection antenna 1 is located in the gap X0 of the multi-turn NFC coil 61, and is staggered with the NFC antenna 6 on the same plane.

[0068] Thus, through Figure 7In the structure shown, since the NFC antenna 6 and the detection antenna 1 are basically located in the same plane, the stacking thickness can be effectively reduced, the space occupied can be effectively reduced, and the space can be effectively saved, which is conducive to reducing the overall thickness of the electronic device 100.

[0069] In some embodiments, the multi-turn NFC coil 61 may be formed by winding a metal conductor wrapped with an insulating layer. In some embodiments, the multi-turn NFC coil 61 may also be formed by winding an FPC.

[0070] In some embodiments, at least one metal coil 11 included in the detection antenna 1 may also have a portion of the coil located outside the outermost coil 61 of the multi-turn NFC coil 61 .

[0071] in, Figure 6 and Figure 7 It is a schematic diagram viewed from the back side of the electronic device 100 , that is, the side away from the display screen of the electronic device 100 .

[0072] Wherein, in some embodiments, Figure 6 and Figure 7 The electronic device 100 further includes a back cover 7, on which a camera hole 71 and a camera decorative ring 72 surrounding the camera hole 71 are formed, wherein the camera hole 71 corresponds to the position of a camera, a flash, etc. inside the electronic device 100, and can be used for the camera to collect light and for the light emitted by the flash to pass through. The camera decorative ring 72 surrounds the camera hole 71.

[0073] Among them, Figure 6 and Figure 7 As shown, the multi-turn NFC coil 61 of the NFC antenna 6 and the at least one circle of metal coil 11 of the detection antenna 1 are both arranged around the camera decorative ring 72, so that the space around the camera decorative ring 72 can be effectively utilized. Since generally speaking, the thickness of the multi-turn NFC coil 61 of the NFC antenna 6 and the at least one circle of metal coil 11 of the detection antenna 1 are less than the height of the camera decorative ring 72, the overall height is the height of the camera decorative ring 72, which is beneficial to reducing the stacking thickness and the overall thickness of the electronic device 100.

[0074] The thickness of the multi-turn NFC coil 61 of the NFC antenna 6 and the at least one turn of the metal coil 11 of the detection antenna 1 and the height of the camera decorative ring 72 are all dimensions along the thickness direction of the electronic device 100. The thickness direction of the electronic device 100 refers to the direction from the front to the back of the electronic device 100, that is, the direction perpendicular to the screen of the display screen of the electronic device 100.

[0075] in, Figure 6 and Figure 7 Each coil in the NFC coil 61 is also illustrated by taking a square as an example. Obviously, each coil in the NFC coil 61 can also be any suitable shape such as a circle or an ellipse.

[0076] in, Figure 6 and Figure 7 In the figure, the camera hole 71 and the camera decoration ring 72 are illustrated by taking a circle as an example. In some embodiments, the camera hole 71 and the camera decoration ring 72 can also be any suitable shape such as a square.

[0077] In some embodiments, the multi-turn NFC coil 61 of the NFC antenna 6 and the at least one turn of the metal coil 11 of the detection antenna 1 may also be arranged at other positions of the back cover 7 , that is, they may not be arranged around the camera decorative ring 72 .

[0078] In some embodiments, the at least one metal coil 11 of the detection antenna 1 may also be independently provided with the multi-turn NFC coil 61 of the NFC antenna 6. That is, the at least one metal coil 11 of the detection antenna 1 may be provided in an area outside the multi-turn NFC coil 61 of the NFC antenna 6.

[0079] In some embodiments, the preset frequency band is a WiFi frequency band, and the preset frequency range is 1 GHz to 10 GHz.

[0080] That is, in some embodiments, the frequency band supported by the communication antenna 2 may be a WiFi frequency band, and the preset frequency range supported by the detection antenna 1 may be 1 GHz to 10 GHz.

[0081] Among them, the WiFi frequency band includes WiFi 2.4G frequency band and WiFi 5G frequency band.

[0082] Among them, in some embodiments, the items to be found in the present application are electronic products, and the electronic products to be detected are generally in a network communication state, and generally speaking, they are connected to the WiFi network. For example, when the item to be found is a voyeur camera in a hotel or other place, the voyeur camera will be connected to the WiFi network and upload the photos or videos taken, and will be in a WiFi communication state. Therefore, in the present application, the preset frequency range supported by the detection antenna 1 is 1GHz to 10GHz, which can cover the WiFi frequency band, and when there are items to be detected / searched around, it can ensure that the electromagnetic wave signal of the WiFi frequency band generated when the items / electronic products to be detected are in WiFi communication is received, so that it can be determined whether there are specific items around through the electromagnetic wave signal currently received within the preset frequency range.

[0083] In some embodiments, the object to be found may also be an electronic product such as a mobile phone or a tablet computer that can be connected to communication via a chat software or a telephone. When the electronic product to be found is in a silent state and is blocked and cannot be seen, and cannot be located by ringing, the electronic product to be found can be placed in a stronger communication state by initiating voice or making a phone call to the electronic product. Thus, the electronic device 100 can also determine whether there are specific objects nearby through the electromagnetic wave signal currently received within the preset frequency range.

[0084] That is, in the present application, the object to be found / detected or the specific object may be a camera, in particular a voyeuristic camera such as a pinhole camera, or may be an electronic product such as a mobile phone or a tablet computer, and so on.

[0085] In some embodiments, the radio frequency module 3 includes a WiFi receiving module. That is, in some embodiments, since the detection antenna 1 only needs to receive electromagnetic wave signals within a preset frequency range, it can be connected only to the receiving module, and since the electronic products to be detected are generally in a networked communication state, and generally speaking, they are connected to a WiFi network, therefore, the radio frequency module can be specifically a WiFi receiving module, and can realize the reception and processing of electromagnetic wave signals in the WiFi frequency band, and obtain processed signals, and the processed signals are used for object detection.

[0086] In some embodiments, the RF module 3 may further include a WiFi transmitting module, that is, the RF module 3 may be a module integrating the WiFi receiving module and the WiFi transmitting module. In some embodiments, the RF module 3 may also only include the WiFi receiving module.

[0087] Among them, according to the frequency band in which the electronic product to be found / detected may operate, the RF module 3 can also be a RF module supporting other corresponding frequency bands, and the communication antenna 2 can also be an antenna supporting other frequency bands.

[0088] In some embodiments, the RF module 3 may also be a RF module that supports multiple frequency bands at the same time, the frequency band supported by the communication antenna 2 may be one of the frequency bands supported by the RF module 3, the frequency band in which the electronic product to be found / detected may operate is also one of the frequency bands supported by the RF module 3, and the frequency band supported by the communication antenna 2 and the frequency band in which the electronic product to be found / detected may operate may be the same or different.

[0089] See also Figure 8 , which is a further structural block diagram of the electronic device 100 in some embodiments of the present application.

[0090] like Figure 8 As shown, in some embodiments, the electronic device 100 further includes a controller 8, the controller 8 is connected to the RF module 3 and the selection switch 4, and the controller 8 is used to control the selection switch 4 to establish a connection between the RF module 3 and the detection antenna 1 in response to a detection start operation. When the RF module 3 receives the electromagnetic wave signal within the preset frequency range transmitted by the detection antenna 1, the electromagnetic wave signal within the preset frequency range is demodulated to obtain a demodulated signal, and the controller 8 is used to receive the demodulated signal and determine whether a specific item is detected according to the demodulated signal.

[0091] That is, in some embodiments, the electronic device 100 further includes a controller 8, and the controller 8 is used to control the selection switch 4, and control the selection switch 4 to establish a connection between the RF module 3 and the detection antenna 1 or the communication antenna 2.

[0092] In some instances, the controller 8 determines each frequency band and the signal strength corresponding to each frequency band based on the demodulated signal, determines the frequency band with the maximum signal strength, and when determining that the frequency band with the maximum signal strength is the target frequency band, determines that a specific object is detected.

[0093] In some embodiments, the target frequency band may be the frequency band at which the object to be detected, that is, the specific object, operates when communicating over the Internet.

[0094] That is, in some embodiments, since the detection antenna 1 can receive electromagnetic wave signals in a wider frequency range, such as the aforementioned 1GHz to 10GHz, the electromagnetic wave signals received by the detection antenna 1 may include electromagnetic wave signals located in multiple frequency bands. The controller 8 can analyze the demodulated signal obtained after demodulation processing by the RF module 3 to determine the frequency bands included in the electromagnetic wave signals currently received by the detection antenna 1 and the signal strength corresponding to each frequency band. Among them, since the detection antenna 1 is similar to an NFC antenna, the closer it is to the signal source emitting a certain frequency band, the stronger the signal strength. As mentioned above, the target frequency band can be the object to be detected, that is, the frequency band at which the specific object works when communicating over the Internet. Therefore, when the controller 8 determines that the frequency band with the largest signal strength is the target frequency band, it is determined that the specific object is close at this time, and it can be determined that the specific object has been detected.

[0095] In some embodiments, the target frequency band is a WiFi frequency band.

[0096] That is, as mentioned above, the object to be found in the present application is an electronic product, and the electronic product to be detected is generally in a network communication state, and generally speaking, it is connected to a WiFi network. For example, when the object to be found is a voyeur camera in a hotel or other place, the voyeur camera will be connected to the WiFi network and upload the photos or videos taken, and will be in a WiFi communication state. Therefore, the target frequency band can be a WiFi frequency band, and when the controller 8 determines that the frequency band with the largest signal strength is the target frequency band, it is determined that the specific object, such as the voyeur camera, is approached at this time, and it can be determined that the specific object, such as the voyeur camera, is detected.

[0097] In some embodiments, the controller 8 is also used to control the selection switch 4 to establish a connection between the RF module 3 and the communication antenna 2 in response to the detection closing operation, so that the RF module 3 can receive and / or transmit electromagnetic wave signals of a preset frequency band through the communication antenna 2 to achieve the communication function of the preset frequency band. When the RF module 3 includes both a transmitting module and a receiving module, the RF module 3 can receive and transmit electromagnetic wave signals of a preset frequency band through the communication antenna 2, and when the RF module 3 only includes a receiving module, the RF module 3 can receive electromagnetic wave signals of a preset frequency band through the communication antenna 2.

[0098] Therefore, the user can exit the object detection function by performing a detection closing operation, so that the electronic device 100 can achieve normal communication in the preset frequency band.

[0099] In some embodiments, Figure 8As shown, the electronic device 100 further includes an input unit 9 . The detection on operation and the detection off operation may be operations inputted through the input unit 9 .

[0100] In some embodiments, the detection on operation or the detection off operation may be an operation of entering a function menu option through the input unit 9 and selecting a “detection on” or “detection off” function option.

[0101] In some embodiments, the input unit 9 includes a touch screen, and the detection-on operation and the detection-off operation may be touch gesture operations with specific touch tracks input on the touch screen. For example, the detection-on operation may be a touch gesture operation with a “√”-shaped track input on the touch screen, and the detection-off operation may be a touch gesture operation with a “×”-shaped track input on the touch screen, and so on.

[0102] In some embodiments, the input unit 9 may also include physical buttons, such as a power button and / or a volume button located on the side frame of the electronic device 100. The detection-on operation and the detection-off operation may be specific pressing operations performed on the physical buttons. For example, the detection-on operation and the detection-off operation may both be operations of pressing the volume button and the power button at the same time. When the detection function is currently in the on state, the operation of pressing the volume button and the power button at the same time is the detection-off operation, and when the detection function is currently in the off state, the operation of pressing the volume button and the power button at the same time is the detection-on operation, and when the detection function is currently in the off state, the operation of pressing the volume button and the power button at the same time is the detection-on operation, and so on.

[0103] In some embodiments, Figure 8 As shown, the electronic device 100 further includes a prompt unit 10. The controller 8 is also connected to the prompt unit 10. When the controller 8 determines that a specific object is detected, the controller 8 also controls the prompt unit 10 to output a prompt signal to remind the user that a specific object such as a peeping camera, a mobile phone, or a tablet computer waiting to be found / detected is detected.

[0104] The prompt unit 10 may include a sound output unit, a light emitting unit and / or a touch screen. The prompt signal may be a sound signal output by the sound output unit, a light signal generated by the light emitting unit and / or a text or pattern prompt displayed on the touch screen. The sound output unit may be a speaker, and the light emitting unit may be an indicator light of the electronic device 100, for example, an indicator light for indicating the charging status, and the indicator light for the detection function may be shared.

[0105] in, Figure 8 For Figure 3The electronic device 100 shown is illustrated by taking the example of further adding the controller 8, the input unit 9 and the prompt unit 10. Obviously, the controller 8, the input unit 9 and the prompt unit 10 may also be added to the electronic device 100 shown in any of the aforementioned figures.

[0106] In some embodiments, the selection switch 4 is a digitally controlled switch, for example, a single-pole double-throw switch composed of two MOS tubes. The controller 8 can be connected to the gates of the two MOS tubes through two pins, and output corresponding level signals to the two MOS tubes through the two pins respectively, thereby controlling one of the MOS tubes to be turned on and the other MOS tube to be turned off, or controlling the other MOS tube to be turned on and one of the MOS tubes to be turned off, thereby establishing a connection between the RF module 3 and the communication antenna 2 or the detection antenna 1.

[0107] The selection switch 4 may also be any other form of switch that can establish a connection between the RF module 3 and the communication antenna 2 or the detection antenna 1 .

[0108] The controller 8 may be a chip with processing capability such as a single chip microcomputer, a microcontroller, a digital signal processor, a central processing unit, etc.

[0109] Among them, Figure 7 As shown, the electronic device 100 also includes a mainboard 101, wherein the RF module 3, the selection switch 4, etc. can be arranged on the mainboard 101. The plane where the at least one circle of metal coil 11 formed by the detection antenna 1 is located can be roughly parallel to the mainboard 101, and the detection antenna 1 is closer to the back side of the electronic device 100 than the mainboard 101, and the projection of the at least one circle of metal coil 11 formed by the detection antenna 1 on the side where the mainboard 101 is located can be located within the range of the mainboard 101. The feeding end 11a of the detection antenna 1 can be connected to the selection switch 4 located on the mainboard 101 through an electrical connector such as a spring, for example, connected to the second fixed end 4c of the selection switch 4, so as to realize the electrical connection between the selection switch 4 and the feeding end 11a.

[0110] In some embodiments, when the electronic device 100 further includes the NFC antenna 6, the projection of the NFC coil 61 of the NFC antenna 6 on the side where the mainboard 101 is located may also be located within the range of the mainboard 101, and the NFC coil 61 is closer to the back side of the electronic device 100 than the mainboard 101. The electronic device 100 further includes a magnetic member (not shown in the figure), which is arranged between the NFC coil 61 of the NFC antenna 6 and the mainboard 101. Since the magnetic member can play a role in bunching magnetic flux, the radiation direction of the NFC communication signal generated by the NFC coil 61 is mainly toward one side of the back side of the electronic device 100, and the magnetic member can also increase the magnetic field strength generated by the NFC coil 61, thereby improving the NFC communication performance. Among them, the magnetic member can be a magnetic material such as ferrite, metal soft magnetic material, etc.

[0111] Among them, Figure 7 As shown, the electronic device 100 further includes a middle frame 102, which is used to carry the display screen and other devices of the electronic device 100, and the middle frame 102 is used as the whole ground of the electronic device 100. The aforementioned grounding can be connected to the middle frame 102 to achieve grounding.

[0112] Thus, in the present application, the electromagnetic wave signal within a preset frequency range can be received through the detection antenna 1. Therefore, when the selection switch 4 establishes a connection between the RF module 3 and the detection antenna 1, the RF module 3 receives the electromagnetic wave signal within the preset frequency range through the detection antenna 1, and the detection antenna 1 includes at least one circle of metal coil 11, and forms a structure similar to the NFC antenna. Therefore, the closer the detection antenna 1 is to the electronic product to be detected, the stronger the signal will be. Thus, the electromagnetic wave signal currently received within the preset frequency range can reflect whether there are specific items around, and the item detection function can be realized. In addition, in the present application, through the selection switch 4, the detection antenna 1 can share the RF module 3 with the communication antenna 2, and can choose to establish the connection between the RF module 3 and the detection antenna 1 or the communication antenna 2 as needed, thereby effectively saving costs.

[0113] Among them, the aforementioned figures only illustrate part of the structure of the electronic device 100. Obviously, the electronic device 100 may also include other structures, such as a memory, a display screen, etc., which will not be described in detail here.

[0114] The electronic device 100 of the present application may be any electronic device with communication function, such as a mobile phone or a tablet computer.

[0115] See also Fig. 9, is a flow chart of an object detection method in some embodiments of the present application. The object detection method can be applied to the electronic device 100 in any of the aforementioned embodiments. The object detection method includes the following steps:

[0116] 901: In response to the detection start operation, the selection switch is controlled to establish a connection between the RF module and the detection antenna.

[0117] 902: The radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to perform object detection.

[0118] Therefore, the object detection method of the present application, when responding to the detection start operation, can establish a connection between the radio frequency module and the detection antenna through the selection switch, and the radio frequency module receives the electromagnetic wave signal within a preset frequency range through the detection antenna. The electromagnetic wave signal currently received within the preset frequency range can reflect whether there are specific objects around, thereby realizing the object detection function.

[0119] In some embodiments, step 902 "the RF module receives the electromagnetic wave signal within a preset frequency range through the detection antenna to perform object detection" includes: when the RF module receives the electromagnetic wave signal within a preset frequency range through the detection antenna, at least the RF module processes the electromagnetic wave signal within the preset frequency range to obtain a processed signal, and the processed signal is used for object detection.

[0120] In some embodiments, the electromagnetic wave signal within the preset frequency range is processed by at least the radio frequency module to obtain a processed signal, and the processed signal is used for object detection, including: demodulating the electromagnetic wave signal within the preset frequency range by the radio frequency module to obtain a demodulated signal; and determining whether a specific object is detected based on the demodulated signal.

[0121] In some embodiments, determining whether a specific item is detected based on the demodulated signal includes: determining each frequency band and the signal strength corresponding to each frequency band based on the demodulated signal, and determining the frequency band with the largest signal strength; and when determining that the frequency band with the largest signal strength is the target frequency band, determining that the specific item is detected.

[0122] In some embodiments, the target frequency band is a WiFi frequency band.

[0123] In some embodiments, the method further includes: in response to a detection shutdown operation, controlling a selection switch to establish an electrical connection between the radio frequency module and the communication antenna to implement a communication function in a preset frequency band.

[0124] In some embodiments, the preset frequency band is a WiFi frequency band.

[0125] In some embodiments, the preset frequency range is 1 GHz to 10 GHz.

[0126] In some embodiments, the target frequency band is a WiFi frequency band.

[0127] In some embodiments, the method further includes the step of: when it is determined that a specific object is detected, controlling the prompt unit to output a prompt signal to remind the user that a specific object such as a peeping camera, a mobile phone, or a tablet computer waiting to be found / detected has been detected.

[0128] See also Fig.10 , is another flow chart of the object detection method in some embodiments of the present application. The object detection method can be applied to the electronic device 100 in any of the above embodiments. The object detection method includes the following steps:

[0129] 1001: In response to the detection start operation, the selection switch is controlled to establish a connection between the RF module and the detection antenna.

[0130] 1002: The radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to detect objects;

[0131] 1003: In response to the detection closing operation, the selection switch is controlled to establish an electrical connection between the radio frequency module and the communication antenna to achieve a communication function in a preset frequency band.

[0132] Wherein, the steps 1001 to 1002 are Fig. 9 Steps 901 to 902 shown in FIG. 9 correspond to each other. For details, see Fig. 9 The relevant contents of step 901 to step 902 are not repeated here.

[0133] Wherein, the step 1003 may be performed after the step 1001 or before the step 1001. Fig.10 In the figure, step 1003 is merely placed after step 1001 for illustration.

[0134] The object detection method of the present application can be specifically applied to the electronic device 100 in any of the aforementioned embodiments, and the steps in the object detection method can be executed by the controller 8 of the electronic device 100 in any of the aforementioned embodiments, or further executed in cooperation with the radio frequency module 3. For more specific steps of the object detection method, refer to the relevant content of the electronic device 100 in any of the aforementioned embodiments.

[0135] The electronic device 100 and the object detection method of the present application, when it is necessary to detect a specific object, can establish a connection between the RF module and the detection antenna through the selection switch, and the RF module receives the electromagnetic wave signal within the preset frequency range through the detection antenna. The electromagnetic wave signal currently received within the preset frequency range can reflect whether there are specific objects around, and the object detection function can be realized. In addition, the electronic device 100 of the present application, through the selection switch 4, the detection antenna 1 can share the RF module 3 with the communication antenna 2, and can choose to establish the connection between the RF module 3 and the detection antenna 1 or the communication antenna 2 as needed, thereby effectively saving costs.

[0136] Among them, each embodiment of the present application may have its own focus, and for content that is not described in detail in some embodiments, please refer to the relevant content of other embodiments.

[0137] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An electronic device, characterized in that: include: A detection antenna, the detection antenna comprising at least one metal coil; A communication antenna, the communication antenna supporting the transmission and reception of electromagnetic wave signals in a preset frequency band; RF module; A selection switch, electrically connected between the detection antenna, the communication antenna and the radio frequency module, for selecting to establish a connection between the radio frequency module and the detection antenna or the communication antenna; When the selection switch establishes a connection between the radio frequency module and the detection antenna, the radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to perform object detection.

2. The electronic device according to claim 1, characterized in that: When the selection switch establishes a connection between the RF module and the detection antenna, when the RF module receives an electromagnetic wave signal within a preset frequency range through the detection antenna, the RF module processes the electromagnetic wave signal within the preset frequency range to obtain a processed signal, and the processed signal is used for object detection.

3. The electronic device according to claim 1, characterized in that: When the selection switch establishes a connection between the communication antenna and the radio frequency module, the radio frequency module receives and / or transmits electromagnetic wave signals of a preset frequency band through the communication antenna to realize a communication function of the preset frequency band.

4. The electronic device according to claim 1, characterized in that: The electronic device also includes a matching tuning unit, which is connected between the detection antenna, the communication antenna and the radio frequency module and is used for matching and tuning the detection antenna and the communication antenna.

5. The electronic device according to claim 4, characterized in that: When the selection switch establishes a connection between the RF module and the detection antenna, the detection antenna supports receiving electromagnetic wave signals within the preset frequency range under the matching tuning of the matching tuning unit. When the selection switch establishes a connection between the communication antenna and the RF module, the communication antenna supports receiving and transmitting electromagnetic wave signals within the preset frequency band under the matching tuning of the matching tuning unit.

6. The electronic device according to claim 5, characterized in that: The matching and tuning unit includes a first matching and tuning subunit and a second matching and tuning subunit, the first matching and tuning subunit is electrically connected between the selection switch and the RF module, the second matching and tuning subunit is electrically connected between the selection switch and the detection antenna, the selection switch is electrically connected between the first matching and tuning subunit, the second matching and tuning subunit and the communication antenna, the selection switch is electrically connected to the RF module through the first matching and tuning subunit, and is electrically connected to the detection antenna through the second matching and tuning subunit, when the selection switch establishes a connection between the RF module and the detection antenna, the detection antenna supports receiving electromagnetic wave signals within the preset frequency range under the matching and tuning of the first matching and tuning subunit and the second matching and tuning subunit, and when the selection switch establishes a connection between the communication antenna and the RF module, the communication antenna supports receiving and transmitting electromagnetic wave signals within the preset frequency band under the matching and tuning of the first matching and tuning subunit.

7. The electronic device according to claim 5, characterized in that: The matching tuning unit includes a first matching tuning subunit and a second matching tuning subunit, the first matching tuning subunit is electrically connected between the selection switch and the communication antenna, the second matching tuning subunit is electrically connected between the selection switch and the detection antenna, the selection switch is electrically connected between the first matching tuning subunit, the second matching tuning subunit and the radio frequency module, the selection switch is electrically connected to the communication antenna through the first matching tuning subunit, and is electrically connected to the detection antenna through the second matching tuning subunit, when the selection switch establishes a connection between the radio frequency module and the detection antenna, the detection antenna supports receiving electromagnetic wave signals within the preset frequency range under the matching tuning of the second matching tuning subunit, and when the selection switch establishes a connection between the communication antenna and the radio frequency module, the communication antenna supports receiving and transmitting electromagnetic wave signals in the preset frequency band under the matching tuning of the first matching tuning subunit.

8. The electronic device according to claim 1, characterized in that: The selection switch is a single-pole double-throw switch, including a free end, a first fixed end and a second fixed end. The free end is electrically connected to the RF module, the first fixed end is electrically connected to the communication antenna, and the second fixed end is electrically connected to the detection antenna. The free end can be selectively connected to the first fixed end or the second fixed end to select to establish a connection between the RF module and the detection antenna or the communication antenna.

9. The electronic device according to claim 1, characterized in that: The at least one circle of metal coil includes a feeding end and a grounding end. The selection switch is electrically connected between the feeding end of the detection antenna, the communication antenna and the radio frequency module. The grounding end is used for grounding.

10. The electronic device according to claim 1, characterized in that: The electronic device further includes an NFC antenna, the NFC antenna includes a plurality of NFC coils, and the at least one metal coil included in the detection antenna is at least one of the NFC coils.

11. The electronic device according to claim 10, characterized in that: The at least one metal coil included in the detection antenna is at least one coil between a first target position and a second target position in the NFC coil, the first target position is used to be electrically connected to the selection switch and serve as a feeding end, and the second target position is used to be grounded and serve as a grounding end.

12. The electronic device according to claim 1, characterized in that: The electronic device further includes an NFC antenna, which includes a multi-turn NFC coil, and a gap is provided between two adjacent turns of the coil, and at least one turn of the metal coil included in the detection antenna is located in the gap between the multi-turn NFC coil.

13. The electronic device according to claim 2, characterized in that: The preset frequency band is a WiFi frequency band, and the preset frequency range is 1 GHz to 10 GHz.

14. The electronic device according to claim 13, characterized in that: The radio frequency module includes a WiFi receiving module.

15. The electronic device according to any one of claims 1 to 14, characterized in that: The electronic device further includes a controller, the controller is connected to the RF module and the selection switch, and the controller is used to control the selection switch to establish a connection between the RF module and the detection antenna in response to a detection start operation; When the RF module receives the electromagnetic wave signal within the preset frequency range transmitted by the detection antenna, it demodulates the electromagnetic wave signal within the preset frequency range to obtain a demodulated signal. The controller is used to receive the demodulated signal and determine whether a specific object is detected based on the demodulated signal.

16. The electronic device according to claim 15, characterized in that: The controller determines each frequency band and the signal strength corresponding to each frequency band according to the demodulated signal, determines the frequency band with the largest signal strength, and determines that a specific object is detected when the frequency band with the largest signal strength is determined to be the target frequency band.

17. The electronic device according to claim 16, characterized in that: The target frequency band is a WiFi frequency band.

18. The electronic device according to claim 15, characterized in that: The controller is also used to control the selection switch to establish a connection between the RF module and the communication antenna in response to the detection closing operation, so that the RF module receives and / or transmits electromagnetic wave signals of a preset frequency band through the communication antenna to realize the communication function of the preset frequency band.

19. A method for detecting an object, characterized in that: The object detection method is applied to the electronic device according to any one of claims 1 to 18, and the object detection method comprises: In response to the detection start operation, controlling the selection switch to establish a connection between the radio frequency module and the detection antenna; and The radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to perform object detection.

20. The object detection method according to claim 19, characterized in that: The radio frequency module receives electromagnetic wave signals within a preset frequency range through the detection antenna to detect objects, including: When the radio frequency module receives an electromagnetic wave signal within a preset frequency range through the detection antenna, the electromagnetic wave signal within the preset frequency range is processed at least by the radio frequency module to obtain a processed signal, and the processed signal is used for object detection.

21. The object detection method according to claim 20, characterized in that: The at least one radio frequency module processes the electromagnetic wave signal within the preset frequency range to obtain a processed signal, wherein the processed signal is used for object detection, including: Demodulating the electromagnetic wave signal within the preset frequency range by the radio frequency module to obtain a demodulated signal; It is determined whether a specific object is detected based on the demodulated signal.

22. The object detection method according to claim 21, characterized in that: The step of determining whether a specific object is detected according to the demodulated signal comprises: Determine each frequency band and the signal strength corresponding to each frequency band according to the demodulated signal, and determine the frequency band with the largest signal strength; and When it is determined that the frequency band with the largest signal strength is the target frequency band, it is determined that the specific object is detected.

23. The object detection method according to claim 22, characterized in that: The target frequency band is a WiFi frequency band.

24. The object detection method according to claim 22, characterized in that: The method further comprises: In response to the detection closing operation, the control selection switch establishes an electrical connection between the radio frequency module and the communication antenna to realize the communication function of the preset frequency band.

25. The object detection method according to claim 24, characterized in that: The preset frequency band is the WiFi frequency band.

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