Metal detection device and security check door

Abstract

The utility model discloses a metal detection device and a security check door, and belongs to the technical field of security check equipment. The security check door comprises a metal detection device. The metal detection device comprises a pedal piece, a coil supporting frame, a transmitting coil and a receiving coil. The coil supporting frame is arranged below the pedal piece, and the transmitting coil and the receiving coil are arranged on the coil supporting frame; the transmitting coil is continuously wound to form a first annular transmitting part and a second annular transmitting part which are arranged side by side, and the winding directions of the first annular transmitting part and the second annular transmitting part are the same, so that the directions of a first magnetic field formed by the first annular transmitting part and a second magnetic field formed by the second annular transmitting part are the same; a first area enclosed by the first annular transmitting part and a second area enclosed by the second annular transmitting part are respectively provided with a receiving coil. According to the metal detection device, the detection accuracy of the foot position of the detected person is high, so that the missed detection probability of the metal contraband is low.

Description

Technical Field

[0001] This application belongs to the technical field of security inspection equipment, and particularly relates to a metal detection device and a security door. Background Art

[0002] With the continuous development of society and the increasing improvement of security requirements, as an important security inspection device, security inspection equipment is more and more widely used in public places. Its main function is to detect metal objects to ensure that the items carried by personnel do not contain metal contraband, so as to maintain public safety and order.

[0003] However, in traditional security inspection equipment, the components for detecting metal objects are usually relatively far from the feet of the person being inspected. Therefore, the detection accuracy of the feet of the person being inspected is not high, resulting in a relatively high probability of missed detection of metal contraband. Utility Model Content

[0004] The purpose of the embodiments of this application is to provide a metal detection device and a security door, which can solve the problem of relatively high probability of missed detection of metal contraband in related technologies.

[0005] The embodiments of this application provide a metal detection device, including a foot pedal, a coil support frame, a transmitting coil, and a receiving coil;

[0006] The coil support frame is arranged below the foot pedal, and both the transmitting coil and the receiving coil are arranged on the coil support frame;

[0007] The transmitting coil is continuously wound to form a first annular transmitting part and a second annular transmitting part arranged side by side, and the winding directions of the first annular transmitting part and the second annular transmitting part are the same, so that the directions of the first magnetic field formed by the first annular transmitting part and the second magnetic field formed by the second annular transmitting part are the same;

[0008] The receiving coil is provided in each of the first area surrounded by the first annular transmitting part and the second area surrounded by the second annular transmitting part.

[0009] In a second aspect, the embodiments of this application provide a security door, which includes a door body and the metal detection device described above, and the metal detection device is connected to the door body.

[0010] In the embodiment of the present application, when the person to be inspected steps on the foot pedal, if there is a metal object at the foot position, the metal object will affect at least one of the first magnetic field and the second magnetic field, so that the signal received by the receiving coil in the first area and / or the signal received by the receiving coil in the second area changes. Furthermore, according to the change in the signal received by at least one of the receiving coil in the first area and the receiving coil in the second area, it can be determined whether there is a metal object at the foot position of the person to be inspected. It can be seen that the metal detection device provided in the embodiment of the present application can detect whether there is a metal object at the foot position of the person to be inspected, and the foot of the person to be inspected directly steps on the metal detection device. Therefore, the metal detection device provided in the embodiment of the present application has a high detection accuracy for the foot position of the person to be inspected, and further reduces the probability of missed detection of metal contraband. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is one of the layout methods of the transmitting coil and the receiving coil disclosed in the embodiment of the present application;

[0012] Figure 2 is the second layout method of the transmitting coil and the receiving coil disclosed in the embodiment of the present application;

[0013] Figure 3 is a partial structural schematic diagram of the metal detection device disclosed in the embodiment of the present application;

[0014] Figure 4 is Figure 3 the enlarged view of part N of

[0015] Figure 5 is the structural schematic diagram of the adjustment mechanism disclosed in the embodiment of the present application;

[0016] Figure 6 is the explosion schematic diagram of the metal detection device disclosed in the embodiment of the present application;

[0017] Figure 7 is Figure 6 the enlarged view of part P of

[0018] Figure 8 is the structural schematic diagram of the metal detection device disclosed in the embodiment of the present application;

[0019] Figure 9 is Figure 8 the enlarged view of part Q of

[0020] Figure 10 is the structural schematic diagram of the foot pedal disclosed in the embodiment of the present application;

[0021] Figure 11 is the schematic diagram of the setting method of the first positioning tooling and the second positioning tooling disclosed in the embodiment of the present application;

[0022] Figure 12 is Figure 11 an enlarged view of the R part;

[0023] Figure 13 is a schematic structural diagram of the security door disclosed in the embodiment of the present application.

[0024] Explanation of reference numerals:

[0025] 110 - foot pedal, 111 - detection part, 1111 - first foot pedal area, 1112 - second foot pedal area, 112 - guiding part, 1121 - first guiding inclined surface, 113 - second guiding part, 1131 - second guiding inclined surface, 120 - coil support frame, 121 - avoidance hole, 130 - skeleton, 141 - support leg, 142 - first support leg, 143 - second support leg, 150 - first gap, 161 - first winding part, 162 - second winding part, 163 - third winding part, 164 - fourth winding part, 165 - fifth winding part, 166 - sixth winding part, 167 - seventh winding part, 168 - eighth winding part, 169 - ninth winding part, 1610 - tenth winding part, 1611 - eleventh winding part, 1612 - twelfth winding part;

[0026] 200 - transmitting coil, 210 - first annular transmitting part, 211 - first area, 220 - second annular transmitting part, 221 - second area, 230 - third annular transmitting part;

[0027] 311 - receiving coil, 3111 - sub - area, 312 - first receiving coil, 313 - second receiving coil;

[0028] 400 - adjustment mechanism, 410 - mounting base, 420 - screw, 421 - limiting part, 430 - sliding part, 431 - clamping groove, 440 - locking part;

[0029] 510 - first positioning tooling, 520 - second positioning tooling;

[0030] 600 - door body. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0032] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0033] The following will combine the accompanying drawings and, through specific embodiments and their application scenarios, elaborate in detail on the metal detection device and security door provided by the embodiments of this application.

[0034] Please refer to Figures 1 to 13 As shown, an embodiment of this application provides a metal detection device, which includes a foot pedal 110, a coil support frame 120, a transmitting coil 200, and a receiving coil 311.

[0035] Specifically, the coil support frame 120 is disposed below the foot pedal 110, and both the transmitting coil 200 and the receiving coil 311 are disposed on the coil support frame 120. The coil support frame 120 provides an installation foundation for the installation of the transmitting coil 200 and the receiving coil 311, so that the stability of both the transmitting coil 200 and the receiving coil 311 is relatively good.

[0036] Refer to Figures 1 to 3 As shown, the transmitting coil 200 is continuously wound to form a first annular transmitting portion 210 and a second annular transmitting portion 220 arranged side by side, and the winding directions of the first annular transmitting portion 210 and the second annular transmitting portion 220 are the same, so that the directions of the first magnetic field formed by the first annular transmitting portion 210 and the second magnetic field formed by the second annular transmitting portion 220 are the same. Optionally, the transmitting coil 200 is made of a core wire, for example. When a current is passed through the core wire, the winding directions of the first annular transmitting portion 210 and the second annular transmitting portion 220 are the same, so that the corresponding current directions of the two are the same, and further the directions of the first magnetic field formed by the first annular transmitting portion 210 and the second magnetic field formed by the second annular transmitting portion 220 are the same. Figures 1 to 2 In [description], the winding directions of both the first annular transmitting portion 210 and the second annular transmitting portion 220 are counterclockwise.

[0037] A receiving coil 311 is provided in each of the first region 211 enclosed by the first annular transmitting portion 210 and the second region 221 enclosed by the second annular transmitting portion 220. Exemplarily, when a receiving coil 311 is provided in the first region 211, the contour line of the orthographic projection of the first annular transmitting portion 210 along the first projection direction is located outside the contour line of the orthographic projection of the receiving coil 311 along the first projection direction, and the first projection direction coincides with the axial center line of the first annular transmitting portion 210. When a receiving coil 311 is provided in the second region 221, the contour line of the orthographic projection of the second annular transmitting portion 220 along the second projection direction is located outside the contour line of the orthographic projection of the receiving coil 311 along the second projection direction, and the second projection direction coincides with the axial center line of the second annular transmitting portion 220. It should be noted that the various parts of the first annular transmitting portion 210 may be in the same plane or in different planes. Similarly, the various parts of the second annular transmitting portion 220 may be in the same plane or in different planes, and the receiving coil 311 may be wholly provided in the first region 211 or the second region 221, or may be partly provided in the first region 211 or the second region 221.

[0038] In the embodiment of the present application, when the person to be examined steps on the foot pedal 110, if there is a metal object at the foot position, the metal object will affect at least one of the first magnetic field and the second magnetic field, so that the signal received by the receiving coil 311 in the first region 211 and / or the signal received by the receiving coil 311 in the second region 221 changes. Furthermore, according to the change in the signal received by at least one of the receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221, it can be determined whether there is a metal object at the foot position of the person to be examined. It can be seen that the metal detection device provided in the embodiment of the present application can detect whether there is a metal object at the foot position of the person to be examined, and the feet of the person to be examined directly step on the metal detection device. Therefore, the detection accuracy of the metal detection device provided in the embodiment of the present application for the foot position of the person to be examined is relatively high, and the probability of missed detection of metal contraband is relatively low.

[0039] Optionally, as shown in Figure 1 and Figure 2 the foot pedal 110 is provided with a first foot region 1111 and a second foot region 1112. The first foot region 1111 corresponds to the position of the first annular transmitting portion 210, and the second foot region 1112 corresponds to the position of the second annular transmitting portion 220, for example.

[0040] During the specific use process, the feet of the person to be examined step on the first foot area 1111 and the second foot area 1112 respectively. That is to say, the feet of the person to be examined are respectively in the first magnetic field and the second magnetic field. Taking the foot of the person to be examined in the first foot area 1111 carrying a metal object and the receiving coil 311 being provided in the first area 211 as an example, the metal object in the first magnetic field can induce a secondary field. Correspondingly, the receiving coil 311 in the first area 211 will generate an induction signal for the secondary field of the metal object in addition to generating an induction signal for the first magnetic field, so that the induction signal generated by the receiving coil 311 in the first area 211 changes, and this change can indicate the presence of a metal object. More specifically, when the change amplitude of the induction signal reaches a preset threshold, it is determined that a metal object appears.

[0041] Optionally, the first area 211 and the second area 221 are both rectangular areas, for example.

[0042] In another embodiment, the coil support frame 120 is provided with a plurality of winding parts, and the transmitting coil 200 is cross-wound continuously on the plurality of winding parts to form a first annular transmitting part 210 and a second annular transmitting part 220.

[0043] In this embodiment, each winding part protrudes, so that the transmitting coil 200 can be supported more stably, and the stability of the transmitting coil 200 is better. In addition, with the help of the winding parts, the time consumed in finding the winding path can be saved, so that the winding of the transmitting coil 200 is more convenient and the winding efficiency of the transmitting coil 200 is higher. Optionally, the winding part can be a convex column.

[0044] In other alternative embodiments, the coil support frame 120 may not be provided with a plurality of winding parts. At this time, the coil support frame 120 can be provided with a continuous winding groove, and the transmitting coil 200 is cross-wound continuously in the winding groove.

[0045] In another embodiment, refer to Figures 1 to 3As shown, the transmitting coil 200 is continuously wound to form a first annular transmitting portion 210, a third annular transmitting portion 230, and a second annular transmitting portion 220 that are arranged side by side. The third annular transmitting portion 230 is located between the first annular transmitting portion 210 and the second annular transmitting portion 220. When receiving coils 311 are provided in both the first region 211 and the second region 221, with such an arrangement, the distance between the portion of the first annular transmitting portion 210 close to the second annular transmitting portion 220 and the receiving coil 311 in the first region 211 can be made smaller, and the distance between the portion of the second annular transmitting portion 220 close to the first annular transmitting portion 210 and the receiving coil 311 in the second region 221 can be made smaller. As a result, the magnetic field intensity at the position of the receiving coil 311 in the first region 211 and the position of the receiving coil 311 in the second region 221 is relatively strong. Furthermore, the reliability of signal transmission between the transmitting coil 200 and the receiving coil 311 is better, energy waste is reduced, and energy utilization efficiency is improved. Optionally, the region enclosed by the third annular transmitting portion 230 is, for example, a rectangular region.

[0046] In other alternative embodiments, the third annular transmitting portion 230 may not be provided. In this case, the opposing portions of the first annular transmitting portion 210 and the second annular transmitting portion 220 are, for example, in contact with each other.

[0047] In an alternative embodiment, referring to Figure 3 As shown, the multiple winding portions in the foregoing text, for example, include a first winding portion 161, a second winding portion 162, a third winding portion 163, a fourth winding portion 164, a fifth winding portion 165, a sixth winding portion 166, a seventh winding portion 167, an eighth winding portion 168, a ninth winding portion 169, a tenth winding portion 1610, an eleventh winding portion 1611, and a twelfth winding portion 1612. Among them, the first winding portion 161, the second winding portion 162, the eleventh winding portion 1611, and the twelfth winding portion 1612 are arranged at intervals along the circumferential direction of the second annular transmitting portion 220. The third winding portion 163, the fourth winding portion 164, the ninth winding portion 169, and the tenth winding portion 1610 are arranged at intervals along the circumferential direction of the third annular transmitting portion 230. The fifth winding portion 165, the sixth winding portion 166, the seventh winding portion 167, and the eighth winding portion 168 are arranged at intervals along the circumferential direction of the first annular transmitting portion 210. Moreover, the first winding portion 161, the second winding portion 162, the tenth winding portion 1610, the ninth winding portion 169, the fifth winding portion 165, and the sixth winding portion 166 are, for example, all arranged in sequence along a first straight line. The seventh winding portion 167, the eighth winding portion 168, the fourth winding portion 164, the third winding portion 163, the eleventh winding portion 1611, and the twelfth winding portion 1612 are, for example, all arranged in sequence along a second straight line. And the first straight line and the second straight line are, for example, parallel to each other.

[0048] During the specific use process, the core wire of the transmitting coil 200 successively bypasses the first winding part 161, the second winding part 162, the third winding part 163, the fourth winding part 164, the fifth winding part 165, the sixth winding part 166, the seventh winding part 167, the eighth winding part 168, the ninth winding part 169, the tenth winding part 1610, the eleventh winding part 1611, and the twelfth winding part 1612, thereby forming the first annular transmitting part 210, the second annular transmitting part 220, and the third annular transmitting part 230. Moreover, the part of the core wire between the second winding part 162 and the third winding part 163 intersects with the part of the core wire between the tenth winding part 1610 and the eleventh winding part 1611. Meanwhile, the part of the core wire between the fourth winding part 164 and the fifth winding part 165 intersects with the part of the core wire between the eighth winding part 168 and the ninth winding part 169.

[0049] More specifically, referring to Figure 1 and Figure 2 shown, the core wire of the transmitting coil 200 is wound successively, for example, along the directions shown by arrow line A, arrow line B, arrow line C, arrow line D, arrow line E, arrow line F, arrow line G, arrow line H, arrow line I, arrow line J, arrow line K, arrow line L, and arrow line M. And the core wire of the transmitting coil 200 can be wound cyclically along the above directions. That is to say, after the previous winding is completed, it is wound again along the direction shown by arrow line A. Of course, the core wire of the transmitting coil 200 can also be wound once along the above directions.

[0050] In another embodiment, referring to Figure 2 shown, at least two receiving coils 311 are provided in both the first region 211 and the second region 221, including the first receiving coil 312 and the second receiving coil 313. The two same-polarity ends of the first receiving coil 312 and the second receiving coil 313 located in the first region 211 are electrically connected, and the two same-polarity ends of the first receiving coil 312 and the second receiving coil 313 located in the second region 221 are electrically connected.

[0051] Optionally, the other two same-polarity ends of the first receiving coil 312 and the second receiving coil 313 located in the first region 211 are, for example, both electrically connected to the signal receiving end of the data processing device, and the other two same-polarity ends of the first receiving coil 312 and the second receiving coil 313 located in the second region 221 are, for example, both electrically connected to the signal receiving end of the data processing device.

[0052] In addition, the positive terminal of the first receiving coil 312 is electrically connected to the positive terminal of the second receiving coil 313, for example, to electrically connect the two same-polarity terminals of the first receiving coil 312 and the second receiving coil 313. Correspondingly, the negative terminal of the first receiving coil 312 and the negative terminal of the second receiving coil 313 are both electrically connected to the signal receiving end of the data processing device, for example, to electrically connect the other two same-polarity terminals of the first receiving coil 312 and the second receiving coil 313 to the signal receiving end of the data processing device. Of course, the negative terminal of the first receiving coil 312 can also be electrically connected to the negative terminal of the second receiving coil 313, and correspondingly, the positive terminal of the first receiving coil 312 and the positive terminal of the second receiving coil 313 are both electrically connected to the signal receiving end of the data processing device.

[0053] During the specific use process, the first receiving coil 312 and the second receiving coil 313 in the first area 211 respectively generate two input signals, and the data processing device processes these two input signals to give the result of whether there is a metal object in the first area 211 or not. Similarly, the first receiving coil 312 and the second receiving coil 313 in the second area 221 also respectively generate two input signals, and the data processing device processes these two input signals to give the result of whether there is a metal object in the second area 221 or not.

[0054] In this embodiment, by means of the first receiving coil 312 and the second receiving coil 313 in the first area 211, it can be determined whether there is a metal object in the first area 211. By means of the first receiving coil 312 and the second receiving coil 313 in the second area 221, it can be determined whether there is a metal object in the second area 221. The first area 211 and the second area 221 respectively correspond to the feet of the person to be inspected, so that it can be determined whether the metal object is specifically on the left foot or the right foot of the person to be inspected.

[0055] Optionally, the first receiving coil 312 and the second receiving coil 313 are differentially connected, for example. In other words, the data processing device has a differential circuit, and the first receiving coil 312 and the second receiving coil 313 are both connected to the differential circuit. During the specific use process, the first receiving coil 312 inputs a first input value to the data processing device, the second receiving coil 313 inputs a second input value to the data processing device, the data processing device takes the difference between the first input value and the second input value, and analyzes and processes the difference to give the result of whether there is a metal object or not.

[0056] In another embodiment, a receiving coil 311 is provided in each of the first region 211 and the second region 221, and each receiving coil 311 is wound to form one or more sub-regions 3111. The receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221 are electrically connected at two same-polarity ends. Correspondingly, the other two same-polarity ends of the receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221 are both electrically connected to the signal receiving end of the data processing device, for example.

[0057] During the specific use process, the receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221 respectively generate two input signals, and the data processing device processes these two input signals to give a result of the presence or absence of a metal object.

[0058] Optionally, the receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221 are, for example, differentially connected. In other words, the data processing device has a differential circuit, and the receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221 are both connected to the differential circuit. During the specific use process, the receiving coil 311 in the first region 211 inputs a first input value to the data processing device, and the receiving coil 311 in the second region 221 inputs a second input value to the data processing device. The data processing device takes the difference between the first input value and the second input value, and analyzes and processes the difference to give a result of the presence or absence of a metal object.

[0059] Optionally, the sub-region 3111 is, for example, a rectangular region, and Figure 1 in, the receiving coil 311 in the first region 211 and the receiving coil 311 in the second region 221 are both wound to form a sub-region 3111.

[0060] Optionally, each receiving coil 311 is, for example, wound cross-continuously to form a plurality of sub-regions 3111. The sub-regions 3111 are, for example, arranged side by side, and the core wires corresponding to two adjacent sub-regions 3111 cross at their connection positions.

[0061] In other alternative embodiments, the first receiving coil 312 may still be in the first region 211, while the second receiving coil 313 may be in the second region 221, and the first receiving coil 312 in the first region 211 and the second receiving coil 313 in the second region 221 are differentially connected. In this case, with the first receiving coil 312 and the second receiving coil 313, it is only possible to determine that there is a metal object at the foot position of the person to be inspected, but it is impossible to determine whether the metal object is on the left foot or the right foot of the person to be inspected. Specifically,Figure 1 The receiving coil 311 in the first region 211 is, for example, the first receiving coil 312, and the receiving coil 311 in the second region 221 is, for example, the second receiving coil 313.

[0062] In another embodiment, the metal detection device further includes an adjustment mechanism 400, and at least one of the first annular transmitting part 210 and the second annular transmitting part 220 is connected to the adjustment mechanism 400. Optionally, for example, two adjustment mechanisms 400 are provided, and the two adjustment mechanisms 400 are respectively connected to the first annular transmitting part 210 and the second annular transmitting part 220. One adjustment mechanism 400 can also be provided and the adjustment mechanism 400 is connected to the first annular transmitting part 210 or the second annular transmitting part 220. Of course, the first annular transmitting part 210 and the second annular transmitting part 220 can also each correspond to at least two adjustment mechanisms 400. In this case, the first annular transmitting part 210 and the second annular transmitting part 220 are both connected to their respective corresponding adjustment mechanisms 400.

[0063] The adjustment mechanism 400 is used to drive a part of the first annular transmitting part 210 or a part of the second annular transmitting part 220 to move in a direction close to or away from its own axial center line, so that the initial signal value received by the receiving coil 311 is within a preset range. When the initial signal value received by the receiving coil 311 is within the preset range, when the signal value of the receiving coil 311 changes, the change amplitude of the signal value of the receiving coil 311 can be more conveniently obtained, thereby reducing the processing difficulty of the signal value of the receiving coil 311. In addition, when the two same-polarity ends of the first receiving coil 312 and the second receiving coil 313 in the first region 211 are electrically connected, and the two same-polarity ends of the first receiving coil 312 and the second receiving coil 313 in the second region 221 are electrically connected, the adjustment mechanism 400 can bring a better adjustment effect. Specifically, when the receiving coil 311 includes the first receiving coil 312 and the second receiving coil 313 described above, with the help of the adjustment mechanism 400, the initial signal value received by at least one of the first receiving coil 312 and the second receiving coil 313 can be more conveniently and quickly adjusted to within the preset range, so that the difference between the initial signal value of the first receiving coil 312 and the initial signal value of the second receiving coil 313 can be more conveniently and quickly controlled within the range required by the differential circuit. Specifically, for example, the difference between the initial signal value of the first receiving coil 312 and the initial signal value of the second receiving coil 313 is adjusted to zero.

[0064] In other alternative embodiments, the metal detection device may not include the adjustment mechanism 400.

[0065] In a further embodiment, refer to Figures 4 to 7As shown, the adjustment mechanism 400 includes a mounting base 410, a screw 420, and a sliding member 430. The screw 420 is rotatably disposed on the mounting base 410. The sliding member 430 is slidably engaged with the mounting base 410 in a first direction. The sliding member 430 is sleeved on the screw 420 and is threadedly connected to the screw 420, and the sliding member 430 is connected to a part of the first annular emission portion 210 or a part of the second annular emission portion 220.

[0066] Among them, in the adjustment mechanism 400 connected to the first annular emission portion 210, the first direction intersects the axial center line of the first annular emission portion 210. Optionally, for example, the two are perpendicular. In the adjustment mechanism 400 connected to the second annular emission portion 220, the first direction intersects the axial center line of the second annular emission portion 220. Optionally, for example, the two are perpendicular.

[0067] In this embodiment, manually rotating the screw 420 can drive the sliding member 430 to slide in the first direction. This operation method is less affected by external interference, and the structure of the screw 420 is relatively simple and the cost is low, so that the overall structure of the adjustment mechanism 400 is relatively simple and the cost is low.

[0068] During the specific use process, when the sliding member 430 connected to the first annular emission portion 210 slides in the first direction, it will drive a part of the first annular emission portion 210 to move in a direction close to or away from the axial center line of the first annular emission portion 210 itself. When the sliding member 430 connected to the second annular emission portion 220 slides in the first direction, it will drive a part of the second annular emission portion 220 to move in a direction close to or away from the axial center line of the second annular emission portion 220 itself.

[0069] Optionally, referring to Figure 5 As shown, the sliding member 430 is provided with a card slot 431, for example. By making the sliding member 430 be snap-fitted with a part of the first annular emission portion 210 or a part of the second annular emission portion 220, the connection between the sliding member 430 and a part of the first annular emission portion 210 or a part of the second annular emission portion 220 is realized.

[0070] In other optional embodiments, the adjustment mechanism 400 includes an electric driving member, for example. The electric driving member is connected to the sliding member 430 to drive the sliding member 430 to slide in the first direction.

[0071] In another embodiment, referring to Figure 5As shown, one end of the screw 420 is provided with a limiting portion 421, and the other end passes through the mounting seat 410. The limiting portion 421 can be in limiting cooperation with the mounting seat 410 in the axial direction of the screw 420. The adjusting mechanism 400 further includes a locking member 440. Optionally, the locking member 440 is, for example, a nut. The locking member 440 and the limiting portion 421 are respectively located on the opposite sides of the mounting seat 410. The locking member 440 is sleeved on the screw 420 and is threadedly connected to the screw 420. The locking member 440 can abut against or separate from the mounting seat 410 to lock or unlock the screw 420.

[0072] In this embodiment, when the locking member 440 abuts against the mounting seat 410, the locking member 440 and the limiting portion 421 cooperate together to lock the position of the screw 420 in its own axial direction, so that the screw 420 cannot move along its own axial direction, and further prevent the sliding member 430 from moving along the axial direction of the screw 420 with the screw 420.

[0073] In other alternative embodiments, the adjusting mechanism 400 may not include the locking member 440 either.

[0074] In another embodiment, refer to Figures 6 to 9 As shown, the metal detection device further includes a framework 130, and the framework 130 is used to connect with the door body 600 of the security inspection door. The foot pedal 110, the framework 130, and the coil support frame 120 are all used to support on the ground surface, and the ground surface is, for example, the ground. The foot pedal 110 is used to enclose a receiving cavity with the ground surface. At least part of the framework 130 and the coil support frame 120 are arranged in the receiving cavity, and there is a gap between at least one of the framework 130 and the coil support frame 120 and the foot pedal 110. With such a setting, when the foot pedal 110 shakes, due to the existence of the gap, at least one of the framework 130 and the coil support frame 120 will not shake with the foot pedal 110, thereby alleviating the interference of the shaking of the foot pedal 110 to at least one of the framework 130 and the coil support frame 120.

[0075] Specifically, there is a gap between the framework 130 and the coil support frame 120, and for the convenience of distinction, this gap is defined as the first gap 150. The specific position of the first gap 150 refers to Figure 9 As shown, the first gap 150 specifically refers to the gap in the height direction of the foot pedal 110.

[0076] In other alternative embodiments, the foot pedal 110 may also be in contact with both the framework 130 and the coil support frame 120.

[0077] In another embodiment, there is a gap, for example, between the framework 130 and the coil support frame 120. For the convenience of distinction, this gap is defined as the second gap, which specifically refers to the gap in the height direction of the foot pedal 110. In this way, when the framework 130 shakes, the coil support frame 120 will not shake along with the framework 130, thereby eliminating the interference of the shaking of the framework 130 on the coil support frame 120. Of course, in other alternative embodiments, the framework 130 and the coil support frame 120 may also be in contact with each other.

[0078] In an alternative embodiment, the framework 130 is, for example, an annular structure, and the coil support frame 120 is, for example, arranged in the cavity of the framework 130. With such an arrangement, the vacant space in the center of the framework 130 is utilized, making the overall metal detection device relatively compact and having a high space utilization rate.

[0079] In another embodiment, referring to Figure 10 As shown, the foot pedal 110 is provided with support legs 141, and the coil support frame 120 is provided with avoidance holes 121. The support legs 141 pass through the avoidance holes 121 and are used to support on the base surface. The arrangement of the support legs 141 increases the contact area between the foot pedal 110 and the base surface, thereby making the foot pedal 110 have better stability.

[0080] In other alternative embodiments, the foot pedal 110 may not include the support legs 141.

[0081] In an alternative embodiment, the foot pedal 110 includes, for example, a detection part 111, a first guiding part 112, and a second guiding part 113. The first guiding part 112 and the second guiding part 113 are respectively arranged on two opposite sides of the detection part 111. The coil support frame 120 and the framework 130 are, for example, both located below the detection part 111, and the detection part 111 has the first foot area 1111 and the second foot area 1112 as described above. The first guiding part 112, the second guiding part 113, the detection part 111, and the base surface together enclose the accommodation cavity as described above. The first guiding part 112 has a first guiding inclined surface 1121, and the second guiding part 113 has a second guiding inclined surface 1131. Referring to Figure 8 As shown, the inclination directions of the first guiding inclined surface 1121 and the second guiding inclined surface 1131 are opposite, and the distance between the top ends of the first guiding inclined surface 1121 and the second guiding inclined surface 1131 is less than the distance between the bottom ends of the first guiding inclined surface 1121 and the second guiding inclined surface 1131.

[0082] In this embodiment, due to the existence of the first guiding inclined surface 1121 and the second guiding inclined surface 1131, the person to be detected can step on and off the foot pedal 110 more conveniently, making the use of the metal detection device more convenient.

[0083] In another embodiment, the metal detection device further includes a first positioning tooling 510 and a second positioning tooling 520. The number of the support legs 141 is at least two, including a first support leg 142 and a second support leg 143. The first positioning tooling 510 and the second positioning tooling 520 are respectively disposed on two opposite sides of the coil support frame 120. The first positioning tooling 510 sequentially passes through the skeleton 130 and the first support leg 142 and extends into the coil support frame 120. The second positioning tooling 520 sequentially passes through the skeleton 130 and the second support leg 143 and extends into the coil support frame 120. The first positioning tooling 510 is in limit fit with the skeleton 130, the first support leg 142, and the coil support frame 120 in the passing direction of the first positioning tooling 510. The second positioning tooling 520 is in limit fit with the skeleton 130, the second support leg 143, and the coil support frame 120 in the passing direction of the second positioning tooling 520, so as to clamp the skeleton 130, the footrest 110, and the coil support frame 120 between the first positioning tooling 510 and the second positioning tooling 520.

[0084] In this embodiment, by clamping the skeleton 130, the footrest 110, and the coil support frame 120 between the first positioning tooling 510 and the second positioning tooling 520, the positions of the skeleton 130, the footrest 110, and the coil support frame 120 can be positioned more conveniently and quickly, so that the installation of the metal detection device is more convenient.

[0085] As a specific implementation manner, for example, the passing direction of the first positioning tooling 510 coincides with the threading direction of the second positioning tooling 520, and this direction is defined as the first positioning direction for convenient description. In addition, when the first positioning tooling 510 passes through the skeleton 130 and the first support leg 142 and extends into the coil support frame 120, the first positioning tooling 510 can at least further position the positions of the skeleton 130, the footrest 110, and the coil support frame 120 in the second positioning direction. When the second positioning tooling 520 passes through the skeleton 130 and the second support leg 143 and extends into the coil support frame 120, the second positioning tooling 520 can also at least further position the positions of the skeleton 130, the footrest 110, and the coil support frame 120 in the second positioning direction. The second positioning direction is, for example, perpendicular to the first positioning direction, and the first positioning direction and the second positioning direction are, for example, both perpendicular to the height direction of the door body 600.

[0086] As a specific implementation manner, refer to Figure 11 and Figure 12As shown, the first positioning tooling 510 and the second positioning tooling 520 are both stepped structures, for example. The first positioning tooling 510 is provided with a first step portion, a second step portion, and a third step portion. The first step portion, the second step portion, and the third step portion are respectively in limit fit with the skeleton 130, the first support leg 142, and the coil support frame 120 in the threading direction of the first positioning tooling 510. The second positioning tooling 520 is provided with a fourth step portion, a fifth step portion, and a sixth step portion, for example. The fourth step portion, the fifth step portion, and the sixth step portion are respectively in limit fit with the skeleton 130, the second support leg 143, and the coil support frame 120 in the threading direction of the second positioning tooling 520.

[0087] As a specific implementation manner, refer to Figures 10 to 12 As shown, the skeleton 130 is provided with a first opening and a second opening, for example. The first support leg 142 is provided with a third opening, for example. The second support leg 143 is provided with a fourth opening, for example. The coil support frame 120 is provided with a fifth opening and a sixth opening, for example. The first opening, the second opening, the third opening, the fourth opening, the fifth opening, and the sixth opening are all arranged facing the base surface. The first positioning tooling 510 can be engaged or disengaged with the skeleton 130, the first support leg 142, and the coil support frame 120 respectively through the first opening, the third opening, and the fifth opening. The second positioning tooling 520 can be engaged or disengaged with the skeleton 130, the second support leg 143, and the coil support frame 120 respectively through the second opening, the fourth opening, and the sixth opening.

[0088] Of course, in other alternative embodiments, the metal detection device may not include the first positioning tooling 510 and the second positioning tooling 520, and the number of the support legs 141 may be only one.

[0089] In an alternative embodiment, the skeleton 130, the coil support frame 120, and the foot pedal 110 are all fixedly connected to the base surface, for example, to improve the stability of the skeleton 130, the coil support frame 120, and the foot pedal 110.

[0090] It should be noted that the "top", "bottom", and "lower" in the embodiments of the present application all refer to the directions when the metal detection device is arranged in the Figure 8 direction shown.

[0091] Please refer to Figure 13 As shown, in the embodiments of the present application, an X-ray security door is further provided, which includes a door body 600 and the metal detection device described above. The metal detection device is connected to the door body 600. The metal detection device described above has a high detection accuracy for the foot position of the person to be inspected. The X-ray security door in this embodiment includes the metal detection device described above, so its detection accuracy for the foot position of the person to be inspected is also high. Furthermore, the X-ray security door provided in this embodiment also has a low probability of missing detection of metal contraband.

[0092] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A metal detection device, characterized in that, It includes a foot pedal part (110), a coil support frame (120), a transmitting coil (200) and a receiving coil (311); The coil support frame (120) is arranged below the foot pedal part (110), and the transmitting coil (200) and the receiving coil (311) are both arranged on the coil support frame (120); The transmitting coil (200) is continuously wound to form a first annular transmitting part (210) and a second annular transmitting part (220) arranged side by side, and the winding directions of the first annular transmitting part (210) and the second annular transmitting part (220) are the same, so that the direction of the first magnetic field formed by the first annular transmitting part (210) and the direction of the second magnetic field formed by the second annular transmitting part (220) are the same; The receiving coil (311) is provided in each of the first area (211) surrounded by the first annular transmitting part (210) and the second area (221) surrounded by the second annular transmitting part (220).

2. The metal detection device according to claim 1, characterized in that The coil support frame (120) is provided with a plurality of winding parts, and the transmitting coil (200) is continuously wound across the plurality of winding parts to form the first annular transmitting part (210) and the second annular transmitting part (220).

3. The metal detection device according to claim 1, characterized in that, At least two receiving coils (311) are provided in each of the first area (211) and the second area (221), including a first receiving coil (312) and a second receiving coil (313). The two same-polarity ends of the first receiving coil (312) and the second receiving coil (313) located in the first area (211) are electrically connected, and the two same-polarity ends of the first receiving coil (312) and the second receiving coil (313) located in the second area (221) are electrically connected; Alternatively, one receiving coil (311) is provided in each of the first area (211) and the second area (221), and each receiving coil (311) is wound to form one or more sub-areas (3111). The two same-polarity ends of the receiving coil (311) located in the first area (211) and the receiving coil (311) located in the second area (221) are electrically connected.

4. The metal detection device according to claim 1, characterized in that, The transmitting coil (200) is continuously wound to form the first annular transmitting part (210), a third annular transmitting part (230) and the second annular transmitting part (220) arranged side by side, and the third annular transmitting part (230) is located between the first annular transmitting part (210) and the second annular transmitting part (220).

5. The metal detection device according to claim 1, characterized in that, The metal detection device further comprises an adjustment mechanism (400), wherein at least one of the first annular transmitting part (210) and the second annular transmitting part (220) is connected to the adjustment mechanism (400), and the adjustment mechanism (400) is used to drive a part of the first annular transmitting part (210) or a part of the second annular transmitting part (220) to move in a direction close to or away from its own axial center line, so that the initial signal value received by the receiving coil (311) is within a preset range.

6. The metal detection device according to claim 5, characterized in that, The adjustment mechanism (400) comprises a mounting seat (410), a screw rod (420) and a sliding member (430), wherein the screw rod (420) is rotatably mounted on the mounting seat (410), the sliding member (430) and the mounting seat (410) are slidably engaged along a first direction, the sliding member (430) is sleeved on the screw rod (420) and is threadedly connected to the screw rod (420), and the sliding member (430) is connected to a portion of the first annular emitting portion (210) or a portion of the second annular emitting portion (220); Wherein, in the adjustment mechanism (400) connected to the first annular emitting part (210), the first direction intersects with the axial center line of the first annular emitting part (210); and in the adjustment mechanism (400) connected to the second annular emitting part (220), the first direction intersects with the axial center line of the second annular emitting part (220).

7. The metal detection device according to claim 6, wherein One end of the screw rod (420) is provided with a limiting portion (421), and the other end passes through the mounting seat (410), and the limiting portion (421) can cooperate with the mounting seat (410) to limit the position in the axial direction of the screw rod (420); The adjustment mechanism (400) further includes a locking member (440), wherein the locking member (440) and the limiting portion (421) are respectively located on opposite sides of the mounting seat (410), and the locking member (440) is sleeved on the screw rod (420) and is threadedly connected to the screw rod (420). The locking member (440) can abut against or separate from the mounting seat (410) to lock or unlock the screw rod (420).

8. The metal detection device according to claim 1, characterized in that, The metal detection device further comprises a frame (130), the frame (130) being used to be connected to the door body (600) of the security door, the footrest (110), the frame (130) and the coil support frame (120) being used to be supported on a base surface, the footrest (110) being used to form an accommodating cavity with the base surface, and at least a portion of the frame (130) and the coil support frame (120) being provided in the accommodating cavity; There is a gap between at least one of the skeleton (130) and the coil support frame (120) and the pedal member (110), and / or there is a gap between the skeleton (130) and the coil support frame (120).

9. The metal detection device according to claim 8, characterized in that, The pedal member (110) is provided with support legs (141), the coil support frame (120) is provided with avoidance holes (121), and the support legs (141) pass through the avoidance holes (121) and are used to support on the base surface.

10. The metal detection device according to claim 9, characterized in that, The metal detection device further includes a first positioning tooling (510) and a second positioning tooling (520). The number of the support legs (141) is at least two, including a first support leg (142) and a second support leg (143). The first positioning tooling (510) and the second positioning tooling (520) are respectively arranged on two opposite sides of the coil support frame (120). The first positioning tooling (510) sequentially passes through the skeleton (130) and the first support leg (142) and extends into the coil support frame (120). The second positioning tooling (520) sequentially passes through the skeleton (130) and the second support leg (143) and extends into the coil support frame (120). Moreover, the first positioning tooling (510) is in limit fit with the skeleton (130), the first support leg (142), and the coil support frame (120) in the passing direction of the first positioning tooling (510), and the second positioning tooling (520) is in limit fit with the skeleton (130), the second support leg (143), and the coil support frame (120) in the passing direction of the second positioning tooling (520), so as to clamp the skeleton (130), the pedal member (110), and the coil support frame (120) between the first positioning tooling (510) and the second positioning tooling (520).

11. A security gate, characterized in that, It includes a door body (600) and the metal detection device according to any one of claims 1-10, and the metal detection device is connected to the door body (600).

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