Detection device

Abstract

The embodiment of the utility model provides a detection device, and relates to the technical field of wireless charging, the detection device comprises a detection platform, a lifting assembly, a receiving assembly and a detection assembly, a detection area is formed on the detection platform, and the detection area is used for placing a to-be-detected product; the lifting assembly is installed on the detection platform and provided with a supporting block located above the detection area, the supporting block can move close to or away from the detection area in the vertical direction, and a pressing face is formed at the bottom of the supporting block. The receiving assembly is mounted on the supporting block and comprises a receiving coil, and the receiving coil is used for receiving a magnetic field generated by the to-be-detected product; the detection assembly comprises a first driving unit and a shielding piece, the shielding piece comprises a shielding part arranged below the receiving coil, and the first driving unit is in driving connection with the shielding piece and is used for driving the shielding piece to move, so that the shielding part is at least partially overlapped or staggered with the receiving coil in the axial direction of the receiving coil, and the detection efficiency and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless charging, in particular to a detection device. BACKGROUND

[0002] Currently, when metal foreign matter detection is performed on a wireless charging product, a person manually places metal foreign matter in a product detection area during testing. The placement position cannot be guaranteed to be consistent each time, and manual operation has the risk of missed detection, is low in efficiency, and in the detection process, the product to be detected is also prone to movement, thereby resulting in low detection accuracy. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide a detection device, aiming to improve the efficiency and accuracy of existing metal foreign matter detection.

[0004] In one aspect, the present application provides a detection device, comprising:

[0005] A detection platform, wherein a detection area is formed on the detection platform, and the detection area is used for placing a product to be detected;

[0006] A lifting assembly, wherein the lifting assembly is installed on the detection platform, and the lifting assembly has a support block located above the detection area, the support block is movable in the up-down direction to approach or move away from the detection area, the bottom of the support block forms a pressing surface, and the pressing surface is used for pressing the product to be detected during detection;

[0007] A receiving assembly, wherein the receiving assembly is installed on the support block, the receiving assembly comprises a receiving coil, and the receiving coil is used for receiving a magnetic field generated by the product to be detected; and

[0008] A detection assembly, comprising a first driving unit and a shielding piece, wherein the shielding piece comprises a shielding portion arranged below the receiving coil, the shielding piece is movable in the radial direction of the receiving coil, the first driving unit is drivingly connected to the shielding piece, and the first driving unit is used for driving the shielding piece to move, so that the shielding portion at least partially overlaps or is misaligned with the receiving coil in the axial direction of the receiving coil.

[0009] In some embodiments, the receiving coil has a receiving surface facing the detection area, and the shielding portion has an exposed position and a shielding position formed by movement thereof;

[0010] When the shielding portion is located at the exposed position, the shielding portion is misaligned with the receiving surface of the receiving coil in the axial direction thereof;

[0011] When the shielding portion is located at the shielding position, at least two-thirds of the receiving surface of the receiving coil overlaps the shielding portion in the axial direction of the receiving coil.

[0012] In some embodiments, the receiving assembly further comprises a mounting base having an upper end face and a lower end face oppositely arranged in the up-down direction, and a plurality of side faces connecting the upper end face and the lower end face;

[0013] The receiving coil is mounted on the lower end face of the mounting base, and the shielding member is mounted on the mounting base.

[0014] In some embodiments, the shielding member further comprises a connecting portion connected with the shielding portion;

[0015] The mounting base is formed with a mounting cavity, and the side faces of the mounting base are formed with through holes communicating with the mounting cavity;

[0016] The first driving unit comprises a first driving cylinder, the first driving cylinder comprises a main body and a driving shaft, the main body is mounted in the mounting cavity, the driving shaft is movably arranged in the through hole and extends along the radial direction of the receiving coil, and the connecting portion of the shielding member is fixedly mounted on the part of the driving shaft outside the mounting cavity.

[0017] In some embodiments, the receiving assembly further comprises a cover body mounted on the mounting base and covering the receiving surface of the receiving coil;

[0018] The cover body is arranged in a spaced manner with the receiving surface to define a guide channel arranged with an open end, and the open end of the guide channel corresponds to the shielding portion to allow the shielding portion to enter and exit.

[0019] In some embodiments, the receiving assembly further comprises a second driving unit mounted on the support block and drivingly connected with the mounting base to drive the mounting base to move in the axial direction of the receiving coil.

[0020] In some embodiments, the shielding portion is made of metal.

[0021] In some embodiments, the lifting assembly further comprises a third driving cylinder mounted on the detection platform, and the third driving cylinder is drivingly connected with the support block to drive the support block to move in the up-down direction.

[0022] In some embodiments, the detection device further comprises a control device communicatively connected with the first driving unit and the third driving cylinder, and the control device is further configured to be communicatively connected with the product to be detected to control the product to be detected to generate a magnetic field.

[0023] In some embodiments, the detection area is further provided with a positioning mold for positioning and placing the product to be detected.

[0024] In the embodiment of the present application, the pressing surface is formed at the bottom of the support block. During the detection of the product to be detected, the support block first moves downward, and the product to be detected is pressed by the pressing surface, so as to prevent the product to be detected from moving. The receiving coil moves to the upper side of the product to be detected together with the support block, and the distance between the receiving coil and the product to be detected is controlled within a preset range. At the same time, the product to be detected generates a magnetic field, and the receiving coil receives the magnetic field generated by the product to be detected. Then, the first driving unit drives the shielding member to move, so that the shielding part at least partially overlaps with the receiving coil in the axial direction of the receiving coil, so as to shield the receiving coil. The automatic metal foreign matter detection is realized. Compared with the manual detection scheme, the detection effect is higher. In the detection process, the pressing surface can press the product to be detected, so as to improve the detection accuracy. Moreover, the driving stroke of the first driving unit is controllable, and the placement position of the shielding member can be placed more accurately compared with the manual placement scheme. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is the front view of the first embodiment of the detection device provided by the present application;

[0027] Figure 2 is Figure 1 is the enlarged view of A in FIG. 1;

[0028] Figure 3 is the perspective view of the first embodiment of the receiving assembly and the detection assembly in the present application;

[0029] Figure 4 is Figure 3 is the enlarged view of B in FIG. 2;

[0030] Figure 5 is the perspective view of the second embodiment of the receiving assembly and the detection assembly in the present application;

[0031] Figure 6 is Figure 5 is the enlarged view of C in FIG. 3;

[0032] Figure 7 is the enlarged view of the third embodiment of the receiving assembly and the detection assembly in the present application;

[0033] Figure 8 For Figure 3 The structural schematic diagram under the assembly of the receiving component and the detecting component in the receiving component and the detecting component.

[0034] Main element symbol explanation:

[0035] Reference Name Reference Name 100 Detection device 10 Detection platform 11 Detection area 20 Lifting assembly 21 Support block 22 Pressing surface 23 Third driving cylinder 30 Receiving assembly 31 Receiving coil 32 Receiving surface 33 Second driving unit 34 Mounting seat 35 Lower end surface of mounting seat 36 Side surface of mounting seat 37 Cover body 38 Guiding channel 40 Detection assembly 41 First driving unit 42 Shielding member 43 Shielding part 44 Connecting part 45 Driving shaft 1 Product to be detected 12 Positioning mold DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “plurality” is two or more, unless otherwise specifically limited.

[0038] “A and / or B” includes the following three combinations: only A, only B, and a combination of A and B.

[0039] The use of “adapted for” or “configured for” in the present application means open and inclusive language that does not exclude devices adapted for or configured for performing additional tasks or steps. In addition, the use of “based on” means open and inclusive, because the process, step, calculation or other action “based on” one or more stated conditions or values can be based on additional conditions or values beyond those stated in practice.

[0040] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. Details are set forth in the following description for purpose of explanation. It should be appreciated that one of ordinary skill in the art will realize that the application can be practiced without the use of these specific details. In other instances, well-known structures and processes are not elaborated as they would be appreciated reported by those with skill in the art. Thus, the present application is not intended to be limited by the

[0041] At present, when metal foreign matter detection is performed on a wireless charging product, a person usually places metal foreign matter in a product detection area during testing. The placement position cannot be guaranteed to be consistent each time, and manual operation has the risk of missed detection, is low in efficiency, and during the detection process, the product to be detected is also prone to movement, thereby resulting in low detection accuracy.

[0042] For this purpose, please refer to Figure 1 , Figure 2 , Figure 7 and 8 , the application provides a detection device 100, which comprises a detection platform 10, a lifting assembly 20, a receiving assembly 30 and a detection assembly 40. The detection platform 10 is formed with a detection area 11 for placing a product to be detected 1. The lifting assembly 20 is installed on the detection platform 10 and has a support block 21 located above the detection area 11. The support block 21 can move towards and away from the detection area 11 in the up-down direction. The bottom of the support block 21 forms a pressing surface 22 for pressing the product to be detected 1 during detection. The receiving assembly 30 is installed on the support block 21 and comprises a receiving coil 31 for receiving a magnetic field generated by the product to be detected 1. The detection assembly 40 comprises a first driving unit 41 and a shielding piece 42. The shielding piece 42 comprises a shielding portion 43 arranged below the receiving coil 31. The shielding piece 42 can move in the radial direction of the receiving coil 31. The first driving unit 41 is drivingly connected to the shielding piece 42 and is configured to drive the shielding piece 42 to move so that the shielding portion 43 at least partially overlaps or is misaligned with the receiving coil 31 in the axial direction of the receiving coil 31.

[0043] It should be noted that the specific implementation form of the lifting assembly 20 is not limited, which can be in the form of a lifting cylinder, or in the form of a lifting motor, etc., which is not limited here. The position of the receiving coil 31 mounted on the support block 21 is not limited, which can be on the top, side, etc. of the support block 21, as long as it can be kept within a predetermined distance range with the product to be detected 1 when the pressing surface 22 presses the product to be detected 1, which is not limited here.

[0044] In the actual detection process, the detection personnel places the product to be detected 1 on the detection platform 10. At this time, the support block 21 moves downward first, and the product to be detected 1 is pressed by the pressing surface 22, so as to prevent it from moving, and the receiving coil 31 moves to the upper side of the product to be detected 1 together with the support block 21, and the distance between the receiving coil 31 and the product to be detected 1 is controlled within a predetermined range. At the same time, the product to be detected 1 generates a magnetic field, and the receiving coil 31 receives the magnetic field generated by the product to be detected 1. Then, the first driving unit 41 drives the shielding piece 42 to move, so that the shielding part 43 at least partially overlaps with the receiving coil 31 in the axial direction of the receiving coil 31, thereby shielding the receiving coil 31, and realizing automatic metal foreign matter detection. Compared with the manual detection scheme, the detection effect is higher, and in the detection process, the pressing surface 22 can press the product to be detected 1, thereby improving the detection accuracy. Moreover, the driving stroke of the first driving unit 41 is controllable, and compared with the manual placement scheme, the placement position of the shielding object can be placed more accurately.

[0045] It should be noted that in other embodiments, the detection device 100 can also automatically realize charging detection. Specifically, during detection, the product to be detected 1 can be communicatively connected with the detection device 100. When charging detection is needed, the product to be detected 1 is sent with a corresponding signal. At this time, the product to be detected 1 generates a magnetic field, and the receiving coil 31 receives the magnetic field to perform charging detection on the product to be detected 1. Correspondingly, at this time, the shielding piece 42 is arranged in a staggered manner with the receiving coil 31 in the axial direction of the receiving coil 31, thereby avoiding the shielding of the receiving coil 31 by the shielding piece 42, which affects the charging detection effect. After the charging detection is completed, the first driving unit 41 drives the shielding piece 42 to move, so that the shielding part 43 at least partially overlaps with the receiving coil 31 in the axial direction of the receiving coil 31, thereby performing metal foreign matter detection.

[0046] Specifically, in further embodiments, the receiving coil 31 has a receiving surface 32 facing the detection area 11, and the shielding part 43 has a revealed position and a shielding position formed by movement thereof; when the shielding part 43 is in the revealed position, the shielding part 43 is misaligned with the receiving surface 32 of the receiving coil 31 in the axial direction thereof; when the shielding part 43 is in the shielding position, at least two-thirds of the receiving surface 32 of the receiving coil 31 overlaps the shielding part 43 in the axial direction of the receiving coil 31.

[0047] In the technical scheme of the embodiments, when the shielding part 43 is in the revealed position, the shielding part 43 is misaligned with the receiving surface 32 of the receiving coil 31 in the axial direction thereof, so that the shielding part 43 does not shield the receiving surface 32 of the receiving coil 31, and the detection device 100 can perform charging detection; when metal foreign matter detection is required, the first driving unit 41 drives the shielding part 43 to move from the revealed position to the shielding position, and when the shielding part 43 is in the shielding position, at least two-thirds of the receiving surface 32 of the receiving coil 31 overlaps the shielding part 43 in the axial direction of the receiving coil 31, so that corresponding detection data is obtained to determine whether the emission end of the product to be detected 1 is qualified.

[0048] Moreover, the specific installation position of the shielding part 42 is not limited, and the shielding part 42 can be directly installed on the test platform or installed on the lifting assembly 20, etc., which is not limited herein; when metal foreign matter detection is performed, the distance between the receiving coil 31 and the product to be detected 1 is generally about 4 mm, and during detection, the shielding part 43 needs to be inserted into the gap of about 4 mm, so if the shielding part 42 is fixedly installed in the up-down direction relative to the test platform 10, the distance between the shielding part 42 and the product to be detected 1 in the up-down direction is too close, and the shielding part 43 is prone to interfere with the taking and placing of the product to be detected 1.

[0049] In further embodiments, the receiving assembly 30 further comprises a mounting seat 34, the mounting seat 34 is installed on the support block 21, the mounting seat 34 has an upper end face and a lower end face oppositely arranged in the up-down direction, and a plurality of side faces connecting the upper end face and the lower end face; the receiving coil 31 is installed on the lower end face 35 of the mounting seat, and the shielding part 42 is installed on the mounting seat 34.

[0050] In this way, when the support block 21 moves up and down, the mounting seat 34 can be driven to move up and down, so that the receiving coil 31 on the mounting seat 34 and the shielding piece 42 can also move up and down with the mounting seat 34, so that the distance between the receiving coil 31 and the shielding piece 42 and the product 1 to be detected in the detection area 11 in the up-down direction can be adjusted. When the product 1 to be detected needs to be taken or placed, the support block 21 can be driven to rise by the lifting assembly 20, and the shielding piece 42 also rises synchronously, thereby avoiding interference of the shielding piece 42 with the taking or placing of the product 1 to be detected.

[0051] Further, the specific implementation form of the first driving assembly is not limited, which can be in the form of a driving motor or in the form of a driving cylinder, etc., which is not limited here. The specific installation position of the first driving unit 41 is also not limited, which can be on the outer surface of the mounting seat 34 or in the mounting seat 34, etc., which is not limited here.

[0052] Please refer to Figure 3 and Figure 4 In further embodiments, the shielding piece 42 further comprises a connecting portion 44 connected with the shielding portion 43; the mounting seat 34 is formed with a mounting cavity, and the side surface 36 of the mounting seat is formed with a through hole communicating with the mounting cavity; the first driving unit 41 comprises a first driving cylinder, the first driving cylinder comprises a main body and a driving shaft 45, the main body is installed in the mounting cavity, the driving shaft 45 is movably arranged in the through hole and extends along the radial direction of the receiving coil 31, and the connecting portion 44 of the shielding piece 42 is fixedly installed on the part of the driving shaft 45 outside the mounting cavity.

[0053] In the technical scheme of the embodiment, by installing the main body in the mounting cavity, compared with the scheme of installing on the outer surface of the mounting seat 34, the overall size of the mounting seat 34 and the first driving unit 41 after assembly can be smaller, and interference of external objects on the driving of the first driving unit 41 can be avoided, the stability of the driving is improved, and in addition, the side surface 36 of the mounting seat is formed with a through hole communicating with the mounting cavity, and the driving shaft 45 is movably arranged in the through hole, compared with the scheme of bottom hole, the hole area can be smaller, the production and manufacturing cost is reduced, and in addition, the first driving unit 41 adopts the cylinder driving mode, the driving stroke is controllable, and the shielding portion 43 can be driven more accurately between the exposed position and the shielding position.

[0054] It is emphasized that the side surface 36 of the mounting seat is formed with a through hole communicating with the mounting cavity, which can be any one of a plurality of side surfaces connecting the upper end surface and the lower end surface, which is not limited here.

[0055] Specifically, under the driving of the first driving cylinder, the driving shaft 45 moves along the axial direction of the through hole, at this time, the connecting portion 44 moves along the axial direction of the through hole, and the shielding portion 43 moves between the exposed position and the shielding position.

[0056] It should be noted that, during the metal foreign matter detection process, the distance between the shielding portion 43 and the product to be detected 1 is close, and the shielding portion 43 is prone to deformation during movement, thereby scratching the product to be detected 1.

[0057] For this purpose, please refer to Figure 3 , 4 and 8, in further embodiments, the receiving assembly 30 further comprises a cover body 37, the cover body 37 is installed on the mounting seat 34, and covers the receiving surface 32 of the receiving coil 31; the cover body 37 is spaced apart from the receiving surface 32 to define a guide channel 38 with one end open, and the opening end of the guide channel 38 corresponds to the shielding portion 43 to allow the shielding portion 43 to enter and exit.

[0058] In the technical scheme of the embodiment, by providing the cover body 37, the cover body 37 is spaced apart from the receiving surface 32 of the receiving coil 31 to define a guide channel 38 with one end open, so that when the first driving unit 41 drives the shielding member 42 to move, the guide channel 38 can guide the shielding portion 43, and after the shielding portion 43 deforms, it can also be blocked by the cover body 37 to avoid scratching the product to be detected 1 by the shielding portion 43.

[0059] It is emphasized that the cover body 37 and the mounting seat 34 can be integrally formed, or can be separately provided and then detachably mounted using screws, buckles or the like, which is not limited here. In an embodiment, the cover body 37 is detachably mounted on the mounting seat 34 by screws. In this way, the installation of the receiving coil 31 is facilitated, and the opening end of the guide channel 38 corresponds to the shielding portion 43. Specifically, the through hole is formed in which side surface, and the opening end of the guide channel 38 corresponds to which side surface, so as to facilitate the shielding portion 43 to enter and exit the guide channel 38. The material of the cover body 37 should be a non-metal material, preferably a magnetic material, so as to avoid affecting the reception of the magnetic field by the receiving coil 31.

[0060] Further, the mounting seat 34 can be fixedly mounted on the support block 21, or can be movably mounted. Please refer to Figure 5 and Figure 6 In an embodiment, the receiving assembly 30 further comprises a second driving unit 33, which is mounted on the support block 21 and drivingly connected to the mounting seat 34 to drive the mounting seat 34 to move in the axial direction of the receiving coil 31.

[0061] In the technical scheme of the embodiment, after the pressing surface 22 of the support block 21 presses the product to be detected 1, the second driving unit 33 can drive the mounting seat 34 to move in the axial direction of the receiving coil 31, so as to drive the receiving coil 31 and the shielding part 43 to move in the axial direction of the receiving coil 31, thereby adjusting the distance between the receiving coil 31 and the product to be detected 1 to adapt to products to be detected 1 of different sizes.

[0062] In addition, in a further embodiment, the shielding part 43 is made of metal, so that the metal foreign matter detection of the product to be detected 1 is realized through the shielding of the shielding part 43.

[0063] It should be noted that the specific implementation form of the lifting assembly 20 is not limited, which can be a driving motor, can also be a driving cylinder, or even a manual driving mode, etc., which is not limited here.

[0064] Please refer to Figure 1 In an embodiment, the lifting assembly 20 further comprises a third driving cylinder 23, which is mounted on the detection platform 10 and drivingly connected to the support block 21 to drive the support block 21 to move in the up-down direction.

[0065] In the technical scheme of the embodiment, the third driving cylinder 23 is provided, so that under the driving of the third driving cylinder 23, the support block 21 is driven to move in the up-down direction, and the support block 21 drives the mounting seat 34 and the receiving coil 31 to move up and down together, thereby facilitating the detection personnel to take and place the product to be detected 1. Moreover, compared with other driving forms, the stability and stroke controllability of the driving cylinder are better, which can improve the stability in the detection process.

[0066] In a further embodiment, the detection device 100 further comprises a control device, which is communicatively connected to the first driving unit 41 and the third driving cylinder 23, and is further used to be communicatively connected to the product to be detected 1 to control the product to be detected 1 to generate a magnetic field.

[0067] Corresponding in the scheme of the embodiment, the detection personnel places the product 1 to be detected in the detection area 11 and connects the product 1 to be detected in communication with the control device. At this time, the control device first controls the third driving cylinder 23 to drive the support block 21 to descend to a specified position, and the pressing surface 22 of the support block 21 presses the upper end surface of the product 1 to be detected, so as to avoid the movement of the product 1 to be detected. Then, the second driving unit 33 drives the mounting seat 34 to move towards the product 1 to be detected, so that the distance between the receiving coil 31 and the product 1 to be detected is controlled to be about 4 mm, and the product 1 to be detected is controlled to generate a magnetic field to perform charging detection. After the charging detection is completed, the first driving unit 41 is controlled to drive the shielding part 43 to move, and metal foreign matter detection is performed, so as to automatically complete the charging detection and metal foreign matter detection of the product 1 to be detected.

[0068] Of course, in some embodiments, for the detection of a single product, the second driving unit 33 can also not be provided. By setting the positional relationship between the receiving coil 31 and the pressing surface 22, the receiving coil 31 is kept within a specific distance range from the upper end surface of the product when the pressing surface 22 presses the product, so that the position of the receiving coil 31 does not need to be adjusted again.

[0069] In addition, please refer to Figure 3 and Figure 5 , in order to further improve the stability in the detection process, the detection area 11 is also provided with a positioning mold 12, which is used for positioning the product 1 to be detected. In the technical scheme of the embodiment, by providing the positioning mold 12, the product 1 to be detected can be positioned and placed, and the positioning mold 12 can position the product 1 to be detected, so as to avoid movement during detection and improve the stability during detection.

[0070] Specifically, the positioning form of the positioning mold 12 is not limited, which can be in the form of positioning protrusions to cooperate with the holes or grooves on the product 1 to be detected for positioning, or in the form of positioning holes, etc., which is not limited here.

[0071] In further embodiments, the positioning mold 12 includes a positioning rib provided on the detection platform 10, which surrounds the outer periphery of the product 1 to be detected, so as to position the product 1 to be detected.

[0072] The detection device provided by the embodiments of the present application is described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above description should not be understood as a limitation on the present application.

Claims

1. A detection device, characterized in that, The application relates to a detection device, which comprises the following parts: a detection platform, wherein a detection area is formed on the detection platform, and the detection area is used for placing a product to be detected; a lifting assembly, wherein the lifting assembly is installed on the detection platform, and the lifting assembly has a supporting block above the detection area, the supporting block can move towards and away from the detection area in the up-down direction, the bottom of the supporting block forms a pressing surface, and the pressing surface is used for pressing the product to be detected during detection; a receiving assembly, wherein the receiving assembly is installed on the supporting block, the receiving assembly comprises a receiving coil, and the receiving coil is used for receiving a magnetic field generated by the product to be detected; and a detection assembly, wherein the detection assembly comprises a first driving unit and a shielding piece, the shielding piece comprises a shielding part arranged below the receiving coil, the shielding piece can move in the radial direction of the receiving coil, the first driving unit is drivingly connected with the shielding piece, and the first driving unit drives the shielding piece to move so that the shielding part at least partially overlaps or is misaligned with the receiving coil in the axial direction of the receiving coil. The receiving coil has a receiving surface facing the detection area, and the shielding part has an exposed position and a shielding position formed by movement; 2. The detection device of claim 1, wherein, when the shielding part is located at the exposed position, the shielding part is misaligned with the receiving surface of the receiving coil in the axial direction of the receiving coil; when the shielding part is located at the shielding position, at least two-thirds of the receiving surface of the receiving coil overlaps with the shielding part in the axial direction of the receiving coil. The receiving assembly further comprises a mounting seat, the mounting seat is installed on the supporting block, the mounting seat has an upper end surface and a lower end surface arranged oppositely in the up-down direction, and a plurality of side surfaces connecting the upper end surface and the lower end surface; 3. The detection device according to claim 1 or 2, characterized in that the receiving coil is installed on the lower end surface of the mounting seat, and the shielding piece is installed on the mounting seat. The shielding piece further comprises a connecting part connected with the shielding part; 4. The detection device of claim 3, wherein, the mounting seat has a mounting cavity formed therein, and the side surfaces of the mounting seat have through holes communicating with the mounting cavity; the first driving unit comprises a first driving cylinder, the first driving cylinder comprises a main body and a driving shaft, the main body is installed on the mounting cavity, the driving shaft is movably arranged in the through hole and extends along the radial direction of the receiving coil, and the connecting part of the shielding piece is fixedly installed on the part of the driving shaft located outside the mounting cavity. The receiving assembly further comprises a cover body, the cover body is installed on the mounting seat and covers the receiving surface of the receiving coil; 5. The detection device of claim 3, wherein, the cover body and the receiving surface of the receiving coil are arranged in a spaced manner to define a guide channel arranged in an open manner at one end, and the open end of the guide channel corresponds to the shielding part to allow the shielding part to enter and exit. The receiving assembly further comprises a second driving unit, the second driving unit is installed on the supporting block and drivingly connected with the mounting seat to drive the mounting seat to move in the axial direction of the receiving coil.

6. The detection device of claim 3, wherein, The shielding part is made of metal.

7. The detection device according to any one of claims 1 to 6, characterized in that ​ 8. The detection device according to any one of claims 1 to 6, characterized in that The lifting assembly further comprises a third driving cylinder mounted on the detection platform, which drives the support block to move up and down.

9. The detection device of claim 8, wherein, The detection device further comprises a control device in communication with the first driving unit and the third driving cylinder, and in communication with the product to be detected, so as to control the product to generate a magnetic field.

10. The detection device according to any one of claims 1 to 6, characterized in that The detection area is further provided with a positioning mold for positioning the product to be detected.

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