CN218567632U - Coil structure of through type detector and through type detector - Google Patents
Coil structure of through type detector and through type detector Download PDFInfo
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- CN218567632U CN218567632U CN202221763412.7U CN202221763412U CN218567632U CN 218567632 U CN218567632 U CN 218567632U CN 202221763412 U CN202221763412 U CN 202221763412U CN 218567632 U CN218567632 U CN 218567632U
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Abstract
The utility model discloses a coil structure of a through type detector and a through type detector, wherein the coil structure comprises a transmitting coil group with two opposite sides, and a middle channel is formed between the transmitting coil group and the transmitting coil group for passing through a measured object; each single-side transmitting coil group of the double-side transmitting coil group comprises an upper coil and a lower coil; the normal directions of the upper coil and the lower coil of the unilateral transmitting coil set are opposite at the same moment, the normal directions of the two upper coils of the bilateral transmitting coil set are opposite at the same moment, and the normal directions of the two lower coils of the bilateral transmitting coil set are opposite at the same moment; in the three-dimensional space of the middle channel, a part of area covers the electromagnetic waves emitted by the unilateral emission coil group, a part of area covers the electromagnetic waves emitted by the bilateral emission coil group, and electromagnetic fields in the directions of x, y and z are formed in the middle channel. The utility model provides high through type detector's detection reliability reduces the condition of leaking judgement.
Description
Technical Field
The utility model relates to a through type detector technical field especially relates to a coil structure and through type detector of through type detector.
Background
The detector is widely applied to various fields, and in order to prevent workers from carrying metal panels or waste materials produced in a factory to go out in a metal processing factory or a raw material smelting factory, the installation of a through type detector is usually selected to detect the workers; in some institutional units, examinations and other occasions, the pass-through detector is also installed to forbid the relevant people to take the mobile phone in and out. In the use occasion of the through type detector, a large amount of rapid people flow determines that the detection effect of the detector must be efficient and reliable, however, in the existing traditional detection technology, coils are respectively arranged in door plates on two sides of the through type detector, magnetic lines of force in the detector are distributed from one door plate to the other door plate and basically along the horizontal direction, when a detected person carries a metal panel or a mobile phone, the maximum section of the metal panel or the mobile phone is kept parallel to the horizontal magnetic line of force in the process of passing through the through type detector, at this time, the section of the metal panel or the mobile phone passing through the horizontal magnetic line of force is very small due to the side edge, the passing through magnetic line of force is less, so the generated eddy current effect is less, the detected eddy current signal is weaker, the detector is possibly subjected to a missing judgment phenomenon, and the reliability of the detection result is greatly reduced, namely, the traditional through type detector cannot ensure that the detection can be detected under any posture of the metal panel or the mobile phone.
SUMMERY OF THE UTILITY MODEL
The utility model provides a coil structure and through type detector of through type detector improves the detection reliability of through type detector, reduces the condition of lou judging.
On one hand, the utility model provides a coil structure of through type detector, which is characterized in that the coil structure comprises a transmitting coil group with two opposite sides, and a middle channel is formed between the transmitting coil group and the transmitting coil group for passing through the detected object;
each single-side transmitting coil group of the double-side transmitting coil group comprises an upper coil and a lower coil; the normal directions of the upper coil and the lower coil of the unilateral transmitting coil set are opposite at the same moment, the normal directions of the two upper coils of the bilateral transmitting coil set are opposite at the same moment, and the normal directions of the two lower coils of the bilateral transmitting coil set are opposite at the same moment;
in the three-dimensional space of the middle channel, a part of area covers the electromagnetic waves emitted by the unilateral emission coil group, and a part of area covers the electromagnetic waves emitted by the bilateral emission coil group, so that electromagnetic fields in the x direction, the y direction and the z direction are formed.
In the scheme, part of the area covers the electromagnetic field emitted by the unilateral emitting coil group, and the position of the bilateral emitting coil group is staggered, so that one unilateral emitting coil group part has no electromagnetic wave emission source, and the electromagnetic wave emitted by the other unilateral emitting coil corresponding to the unilateral emitting coil group part generates horizontal magnetic lines of force of an x axis under the condition of no influence of other emission sources, namely the normal direction of the bilateral emitting coil group; the electromagnetic field emitted by the bilateral emission coil group is covered in a partial area, and the normal directions of the upper coils of the bilateral emission coil group are opposite at the same moment, the normal directions of the lower coils of the bilateral emission coil group are opposite at the same moment, and the directions of the magnetic induction lines generated by the same horizontal bilateral emission coil are opposite, so that the magnetic force line in the middle of the channel deflects to the direction parallel to the y axis, namely the direction of a measured object passing through the channel; and part of the area covers the electromagnetic field emitted by the bilateral emission coil group, so that magnetic lines of force between the upper coil and the lower coil of the bilateral emission coil group are extruded and deformed, and the normal directions of the upper coil and the lower coil of the unilateral emission coil group are opposite at the same moment, and the extruded and deformed magnetic lines of force enter the lower coil to form an annular magnetic field, thereby generating a magnetic field in the z-axis direction. Therefore, when the maximum section of the metal plate or the mobile phone can pass through more magnetic lines in any directions of x, y and z, a stronger eddy current signal is generated, so that the reliability of detecting the metal plate or the mobile phone by using the coil structure is improved, and the missing judgment is avoided.
As an improvement of the above scheme, the two upper coils of the bilateral transmitting coil group have the same coil shape, and the coil centers are different; and/or the two lower coils of the bilateral transmission coil group have the same coil shape and different coil centers.
In the scheme, the two upper coils of the double-side transmitting coil set are identical in shape, the two upper coils are partially overlapped due to different coil centers, the coils of the overlapped part provide the partial area of the middle channel covered by the electromagnetic waves transmitted by the double-side transmitting coil set, and the coils of the non-overlapped part provide the partial area of the middle channel covered by the electromagnetic waves transmitted by the single-side transmitting coil set. The two lower coils of the bilateral transmitting coil set have the same structure.
As an improvement of the above scheme, the two upper coils of the bilateral transmission coil group have different coil shapes; and/or the coil shapes of the two lower coils are different.
In the scheme, the two upper coils of the double-side transmitting coil set are different in shape, so that the two upper coils are partially overlapped, the coils of the overlapped part provide the partial area of the middle channel covered by the electromagnetic waves transmitted by the double-side transmitting coil set, and the coils of the non-overlapped part provide the partial area of the middle channel covered by the electromagnetic waves transmitted by the single-side transmitting coil set. The two lower coils of the bilateral transmission coil set have the same principle.
As an improvement of the scheme, at least two sets of bilateral transmitting coil sets are arranged. In this scheme, two unilateral transmitting coil group that set up relatively are bilateral transmitting coil group, set up the bilateral transmitting coil group of multiunit and be when being in order to detect the testee, it is more accurate from the detection position angle to say, and the magnetic field in the three direction of x, y, z that distributes on the follow intermediate channel is more, and the magnetic line of force that passes the biggest sectional area of testee is more, and the eddy current signal that produces is stronger, and then the sensitivity of detecting the testee is higher.
As an improvement of the scheme, the coil positions of at least two groups of the bilateral transmitting coil groups are staggered. In the scheme, the coil positions are staggered, so that the width of the z-axis electromagnetic field can be further increased, namely the width of the detection induction area of the detected object is increased, and the detection reliability of the detected object is improved.
As an improvement of the above solution, the transmitting coil unit structure composed of the double-sided or single-sided upper coil and the lower coil is provided with coils at the upper part and/or the bottom part, respectively, and the frequency of the coils is different from that of the transmitting coil unit structure. In the scheme, the different frequencies are set to prevent the detected object from detecting the position cluster area and strengthen the magnetic fields distributed on the middle channel in the x direction, the y direction and the z direction.
As an improvement of the above solution, it is characterized in that the upper coil and the lower coil may or may not be electrically connected.
On the other hand, the utility model provides a through type detector, including the major structure, be equipped with the host computer in the major structure and be used for the coil structure of through type detector with it links to each other, characterized in that, the coil structure includes the relative transmitting coil group that sets up in bilateral, forms the intermediate channel between the two and is used for passing through the testee;
each single-side transmitting coil group of the double-side transmitting coil group comprises an upper coil and a lower coil; the normal directions of the upper coil and the lower coil of the unilateral transmitting coil set are opposite at the same moment, the normal directions of the upper coil and the lower coil of the bilateral transmitting coil set are opposite at the same moment, and the normal directions of the lower coil of the bilateral transmitting coil set are opposite at the same moment;
in the three-dimensional space of the middle channel, a part of area covers the electromagnetic field emitted by the unilateral emission coil group, and a part of area covers the electromagnetic field emitted by the bilateral emission coil group, so that electromagnetic fields in the directions of x, y and z are formed.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses in the intermediate passage of detector, electric current in the coil is alternating current, the upper portion coil and the lower part coil normal direction of same transmitting coil are opposite at same moment, the upper portion coil of two transmitting coils and the normal direction of lower part coil are opposite at same moment, the lower part coil is around the normal direction of direction and is opposite at same moment, in the three-dimensional space of intermediate passage, there is some region to have bilateral transmitting coil to cover, some region only has unilateral transmitting coil to cover, can produce x in the detection area, y, the electromagnetic field of the three direction of z, utilize transmitting coil group to detect the metal panel through the security inspection passageway with different posture of putting in proper order with the syntropy magnetic field that produces in bilateral transmitting coil coverage area and produce in unilateral transmitting coil coverage area, simultaneously, utilize the syntropy magnetic field condition, solve metal panel or cell-phone and be on a parallel with transmitting coil and difficult problem that detects when passing through in the security inspection passageway under the condition, utilize the magnetic field condition of dispersing, the problem of difficult detection when solving metal panel or cell-phone and passing through the security inspection passageway under the magnetic field condition smoothly, the mutual complementation of metal panel, the reliability of metal detector has been improved effectively, the missing phenomenon of the detection is carried out.
Drawings
Fig. 1 is a schematic diagram of a first example of a coil structure of a pass-through detector according to the present invention;
fig. 2 is a front view of a first example of a coil structure of a pass-through detector of the present invention;
fig. 3 is a top view of a first example of a coil structure of a pass-through detector of the present invention;
fig. 4 is a bottom view of a first example of a coil structure of a pass-through detector of the present invention;
fig. 5 is a left side view of a first example of a coil structure of a pass-through detector of the present invention;
fig. 6 is a schematic diagram of a second example of a coil structure of a pass-through detector according to the present invention;
fig. 7 is a schematic diagram of a third example of a coil structure of a pass-through detector according to the present invention;
fig. 8 is a schematic diagram of a fourth example of a coil structure of a pass-through detector according to the present invention;
fig. 9 is a schematic diagram of a fifth example of a coil structure of a pass-through detector according to the present invention;
fig. 10 is a schematic diagram of a sixth example of a coil structure of a pass-through detector according to the present invention;
fig. 11 is a schematic diagram of a seventh example of a coil structure of the pass-through detector of the present invention;
fig. 12 is a schematic diagram of an eighth example of the coil structure of the through type probe according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The coil structure for the through type detector according to various embodiments of the present invention includes a transmitting coil 1, a transmitting coil 2, and a receiving coil (not shown). The transmitting coil 1 and the transmitting coil 2 are respectively connected with the receiving coil in an electromagnetic coupling mode. The transmitting coil 1 and the transmitting coil 2 are respectively located on two sides of a door panel of the through type detector 300 and are oppositely arranged, and a middle channel is formed between the transmitting coil 1 and the door panel and used for passing through a measured object. Coil currents of the transmitting coil sets 1 and 2 are alternating currents, and when excitation signals are sent through the transmitting coils, the receiving coils can generate induction signals. The current in the transmitting coil group is alternating current, and the voltage value induced by the receiving coil is used for detecting the object to be detected.
All embodiments of the coil structure of the pass-through detector and the pass-through detector formed therefrom comply with the following rules:
in terms of the coil shape and size rules, the sizes of the transmitting coil 1 and the transmitting coil 2 may be equal or unequal.
In terms of the number of turns, the number of turns of the transmitting coil 1 and the number of turns of the transmitting coil 2 may be equal or may not be equal.
In terms of the position rule, the center positions of the transmitting coil 1 and the transmitting coil 2 may or may not coincide with each other after being rotated by 180 degrees along the z-axis.
In terms of wiring rules, there may or may not be actual electrical connections between different transmit coils within the same transmit coil assembly.
Referring to fig. 1, fig. 1 is a schematic diagram of a first example of a coil structure of a through-type detector according to the present invention. The transmitting coil 1 of the coil structure of the through type detector comprises a unilateral transmitting coil group consisting of an upper coil 11 and a lower coil 12, wherein the upper coil 11 and the lower coil 12 are forward and reverse wound coils made of the same wire. The transmitting coil 2 is another single-side transmitting coil group consisting of an upper coil 21 and a lower coil 22, and the upper coil 21 and the lower coil 22 are forward and reverse wound coils made of the same wire. The transmitting coil 1 and the transmitting coil 2 form a bilateral transmitting coil, the shape and the size of the two coils are the same, and the centers of the bilateral coils are not overlapped.
A rectangular coordinate system is established as shown in fig. 1, with the transmitter coils 1 and 2 parallel to the y-axis. Referring to fig. 5, where the transmitting coil 1 is close to the negative direction of the y-axis, the transmitting coil 2 is close to the positive direction of the y-axis, the transmitting coil 1 and the transmitting coil 2 are staggered and not overlapped, and in the three-dimensional space of the middle channel, there is a part of area covered by the double-sided transmitting coil, and a part of area is covered by the single-sided transmitting coil only. The upper coil 11 of the transmitting coil is wound anticlockwise when viewed along the positive direction of the x axis, the lower coil 12 of the transmitting coil is wound clockwise, the upper coil 21 of the transmitting coil is wound clockwise, the lower coil 22 of the transmitting coil is wound anticlockwise, and the right-hand rule shows that the magnetic induction lines generated by the upper coil 21 are parallel along the positive direction of the x axis, the magnetic induction lines generated by the upper coil 11 are parallel along the negative direction of the x axis, the magnetic induction lines generated by the lower coil 22 are parallel along the negative direction of the x axis, and the magnetic induction lines generated by the lower coil 12 are parallel along the positive direction of the x axis.
Referring to fig. 2, fig. 2 is a front view of a first example of a coil structure of a through-type detector according to the present invention, in which the directions of magnetic induction lines generated by the upper coil and the lower coil are opposite, and the magnetic induction lines are deflected in the direction parallel to the z-axis in the middle of the channel, so that a magnetic field in the z-axis direction is generated in this region.
Referring to fig. 3, fig. 3 is a top view of a first example of a coil structure of a through-type detector according to the present invention, in a detector channel, for only a single-side transmitting coil coverage area generated by coil dislocation, a magnetic field in the x-axis direction is generated in the area due to only the single-side transmitting coil; in the coverage area of the double-side transmitting coil, the directions of magnetic induction lines generated by the transmitting coils on two sides of the same horizontal plane are opposite, and the magnetic induction lines in the middle of the channel deflect towards the direction parallel to the y axis, so that a magnetic field in the direction of the y axis is generated in the coverage area.
Referring to fig. 4, fig. 4 is a bottom view of a first example of a coil structure of a through-type detector according to the present invention, in a channel of the detector, for a region covered by only one-sided transmitting coil, since only one-sided transmitting coil acts, a magnetic field in the x-axis direction is generated in the region; in the coverage area of the double-side transmitting coil, the directions of magnetic induction lines generated by the transmitting coils on two sides of the same horizontal plane are opposite, and the magnetic induction lines deflect towards the direction parallel to the y axis in the middle of the channel, so that a magnetic field in the direction of the y axis is generated in the coverage area.
Referring to fig. 5, fig. 5 is a left side view of a first example of the coil structure of the through type detector of the present invention, and the positions of the transmitting coil 1 and the transmitting coil 2 in the door panel of the detector are not completely overlapped when viewed from the positive direction of the x-axis.
Because the magnetic fields in the x, y and z directions exist in the middle of the channel, the maximum sectional area of the metal plate and the mobile phone to be measured can generate an effective eddy magnetic field no matter the metal plate and the mobile phone pass through the detector in any posture, the detection rate of the measured object is greatly improved, and the reliability of the pass-through detector is improved.
In terms of the winding rule, along the positive direction of the x axis, the upper coil 11 of the transmitting coil can adopt a clockwise or counterclockwise winding method, if the upper coil 11 of the transmitting coil adopts a clockwise winding method, the lower coil 12 of the transmitting coil adopts a counterclockwise winding method, the upper coil 21 of the transmitting coil adopts a counterclockwise winding method, and the lower coil 22 of the transmitting coil adopts a clockwise winding method; if the upper coil 11 of the transmitter coil is wound counterclockwise, the lower coil 12 of the transmitter coil is wound clockwise, the upper coil 21 of the transmitter coil is wound clockwise, and the lower coil 22 of the transmitter coil is wound counterclockwise.
The arrangement of the transmitter coils 1 and 2 can be designed in a variety of ways.
Referring to fig. 6, fig. 6 is a schematic diagram of a second example of a coil structure of a through-type detector according to the present invention. The difference between the second embodiment and the first embodiment is only a mirror image of the offset position of the transmit coil arrangement. Referring to fig. 5, the transmitting coil 1 of the present embodiment is close to the positive y-axis direction, and the transmitting coil 2 of the present embodiment is close to the negative y-axis direction.
Referring to fig. 7, fig. 7 is a schematic diagram of a third example of the coil structure of the through-type detector of the present invention. The difference between the third embodiment and the first embodiment is that the coil shapes and sizes of the transmitting coil 1 and the transmitting coil 2 in the present embodiment are different, and the centers of the two coils do not coincide. Optionally, the center of the transmitting coil 1 is deviated to the negative direction of the y axis relative to the center of the door panel of the detector, the center of the transmitting coil 2 coincides with the center of the door panel of the detector, and the coil shapes and sizes of the transmitting coil 1 and the transmitting coil 2 are different.
Referring to fig. 8, fig. 8 is a schematic diagram of a fourth example of the coil structure of the through-type detector of the present invention. The difference between the fourth embodiment and the first embodiment is that the coil shapes and sizes of the transmitting coil 1 and the transmitting coil 2 in the present embodiment are different, and the centers of the two coils are overlapped. In the embodiment, the center of the transmitting coil 1 coincides with the center of the detector door panel, the center of the transmitting coil 2 coincides with the center of the detector door panel, and the transmitting coil 1 and the transmitting coil 2 are different in size.
Referring to fig. 9, fig. 9 is a schematic diagram of a fifth example of the coil structure of the through type detector of the present invention. The difference between the fifth embodiment and the first embodiment is only that: there is no actual electrical connection between the upper coil 11 and the transmitter coil lower coil 12, and there is no actual electrical connection between the upper coil 21 and the transmitter coil lower coil 22 in this embodiment.
Referring to fig. 10, fig. 10 is a schematic diagram of a sixth example of the coil structure of the pass-through detector of the present invention. The difference between the sixth embodiment and the first embodiment is only that: the number of sets of the bilateral transmitting coil sets in this embodiment can be set as required, wherein the transmitting coil 1 and the transmitting coil 2 are a set.
There are two pairs of transmit coil sets in this example, i.e. there are two transmit coils 1 and two transmit coils 2.
Referring to fig. 11, fig. 11 is a schematic diagram of a seventh example of the coil structure of the through-type detector of the present invention. The seventh example differs from the sixth example only in that: the coil positions of the two bilateral transmitting coil groups are staggered. In the present embodiment, there are two sets of bilateral transmitter coils, that is, there are one set of bilateral transmitter coils 1 and 2 and one set of bilateral transmitter coils 1 'and 2', and meanwhile, the positions of the transmitter coils 1 and 1 'are staggered, and the positions of the transmitter coils 2 and 2' are staggered.
Referring to fig. 12, fig. 12 is a schematic diagram of an eighth example of the coil structure of the through-type detector of the present invention. The difference between the first embodiment and the second embodiment is only that: in addition to the transmitting coil 1 and the transmitting coil 2, the present embodiment also includes a transmitting coil 3, a transmitting coil 4, a transmitting coil 5, and a transmitting coil 6 having different coil structures in other regions.
In addition to the transmitter coil 1 and the transmitter coil 2, other configurations of transmitter coils may be present in the detector.
In another aspect, the ninth embodiment provides a through-type detector, which includes a detector housing, and a transmitting coil set, a receiving coil and a host mounted on the controller housing, wherein a security inspection channel is disposed in the middle of the detector housing, the transmitting coil 1 and the transmitting coil 2 of the transmitting coil set are respectively disposed on two sides of the security inspection channel, the transmitting coil set and the receiving coil are connected in an electromagnetic coupling manner, and both the transmitting coil set and the receiving coil are electrically connected to the host, wherein the current of the coils in the transmitting coil set is an alternating current, the winding normal directions of the coils of the upper coil 11 and the lower coil 12 of the transmitting coil 1 are opposite at the same time, the winding normal directions of the coils of the upper coil 21 and the lower coil 22 of the transmitting coil 2 are opposite at the same time, the winding normal directions of the coils of the upper coil 11 and the upper coil 21 are opposite at the same time, the winding normal directions of the coils of the lower coil 12 and the lower coil 22 are opposite at the same time, and in a three-dimensional space of the middle channel, a partial area is covered by a single-sided transmitting coil, and three-sided electromagnetic fields in the x-z direction, the y-z-direction are formed in the detection area.
The pass-through detector includes a coil structure, and the detailed description thereof is omitted with reference to the first to eighth embodiments.
Use the utility model discloses a coil structure for detector founds through type detector, can effectively solve the higher problem of the rate of missing reporting that exists in the through type detector, greatly promotes through type detector's reliability and detection efficiency.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (16)
1. The coil structure of the through type detector is characterized by comprising transmitting coil groups which are oppositely arranged on two sides, and a middle channel is formed between the transmitting coil groups and the transmitting coil groups for passing through a measured object;
each single-side transmitting coil group of the double-side transmitting coil group comprises an upper coil and a lower coil; the normal directions of the upper coil and the lower coil of the unilateral transmitting coil set are opposite at the same moment, the normal directions of the two upper coils of the bilateral transmitting coil set are opposite at the same moment, and the normal directions of the two lower coils of the bilateral transmitting coil set are opposite at the same moment.
2. A coil structure of a pass-through detector as set forth in claim 1, wherein in the three-dimensional space of the middle channel, a part of the area covers the electromagnetic waves emitted by the single-side transmitting coil set, and a part of the area covers the electromagnetic waves emitted by the double-side transmitting coil set, so as to form electromagnetic fields in the x, y and z directions.
3. The coil structure of a pass-through detector as claimed in claim 1, wherein the two upper coils of said bilateral transmission coil set have the same coil shape and different coil centers; and/or the two lower coils of the bilateral transmission coil group have the same coil shape and different coil centers.
4. The coil structure of a pass-through detector as claimed in claim 1, wherein the two upper coils of said bilateral transmission coil set have different coil shapes; and/or the coil shapes of the two lower coils are different.
5. A coil configuration for a pass-through detector as claimed in claim 1, wherein at least two sets of said sets of bilateral transmit coils are provided.
6. A coil structure of a pass-through detector as set forth in claim 5, wherein the coil positions of at least two of said sets of bilateral transmission coils are staggered.
7. A coil structure of a pass-through detector according to claim 1, wherein the upper coil and the lower coil of the double-side or single-side form a transmission coil unit structure, and coils having different frequencies are respectively disposed at the upper and/or lower portions of the transmission coil unit structure.
8. A coil structure of a transit-type probe according to any one of claims 1 to 7, wherein the upper coil and the lower coil are connected or disconnected.
9. A through type detector comprises a main body structure, wherein a host and a coil structure connected with the host and used for the through type detector are arranged in the main body structure;
each single-side transmitting coil group of the double-side transmitting coil group comprises an upper coil and a lower coil; the normal directions of the upper coil and the lower coil of the unilateral transmitting coil set are opposite at the same moment, the normal directions of the two upper coils of the bilateral transmitting coil set are opposite at the same moment, and the normal directions of the two lower coils of the bilateral transmitting coil set are opposite at the same moment.
10. A pass-through detector as claimed in claim 9, wherein in the three-dimensional space of the middle channel, a part of the area covers the electromagnetic waves emitted by the single-side transmitting coil set, and a part of the area covers the electromagnetic waves emitted by the double-side transmitting coil set, so that electromagnetic fields in the x, y and z directions are formed.
11. A pass-through detector as claimed in claim 9, wherein the two upper coils of the bilateral transmission coil set are identical in coil shape and different in coil center; and/or the two lower coils of the bilateral transmission coil group have the same coil shape and different coil centers.
12. A pass-through detector as claimed in claim 9, wherein the two upper coils of the bilateral transmission coil set differ in coil shape; and/or the coil shapes of the two lower coils are different.
13. A pass-through detector as claimed in claim 9, wherein at least two sets of said sets of bilateral transmit coils are provided.
14. A pass-through detector as claimed in claim 13, wherein the coil positions of at least two of said sets of bilateral transmit coils are staggered.
15. A transit probe according to claim 9, wherein the double or single sided upper and lower coils form a transmit coil unit structure, the upper and/or lower portion of which is provided with a coil, respectively, having a frequency different from the frequency of the transmit coil unit structure.
16. A pass-through detector as claimed in any one of claims 9 to 15, wherein said upper coil and said lower coil are connected or disconnected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221085589 | 2022-05-06 | ||
| CN2022210855896 | 2022-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218567632U true CN218567632U (en) | 2023-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221763412.7U Active CN218567632U (en) | 2022-05-06 | 2022-07-06 | Coil structure of through type detector and through type detector |
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| Country | Link |
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| CN (1) | CN218567632U (en) |
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- 2022-07-06 CN CN202221763412.7U patent/CN218567632U/en active Active
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