Coil structure of a through-type probe and through-type probe

Abstract

The application discloses a coil structure of a through-type detector and the through-type detector, wherein the coil structure comprises double-side opposite transmission coil groups, and an intermediate channel is formed between the two groups for passing through a measured object; one single-side transmission coil group comprises a matrix structure of at least two rows of coils and at least two columns of coils, one row of coils comprises at least two coils, and one column of coils comprises at least two coils; the normal directions of two adjacent coils in a horizontal direction are opposite at the same time, and the normal directions of two adjacent coils in a vertical direction are opposite at the same time; in a three-dimensional space of the intermediate channel, the normal directions of the coils of the double-side transmission coil groups in some regions are opposite, and the normal directions of the coils of the double-side transmission coil groups in some regions are the same, and electromagnetic fields in x, y and z directions are formed. The application improves the detection reliability of the through-type detector and reduces the missed judgment condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of through-type detector, in particular to a coil structure of through-type detector and the through-type detector. BACKGROUND

[0002] The detector is widely used in various fields. In order to prevent workers from carrying metal panels or waste produced in the factory out of the factory, a through-type detector is usually installed to detect the workers in the metal processing factory or raw material smelting factory. In some government units, examinations and other occasions, a through-type detector is also installed to prevent relevant personnel from carrying mobile phones in and out. In the use occasions of the through-type detector, a large number 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 arranged in the door plates on both sides of the through-type detector. The magnetic lines of force inside the detector are distributed from one door plate to the other door plate basically along the horizontal direction. When the detected person carries a metal panel or a mobile phone, the maximum cross section of the metal panel or the mobile phone is kept parallel to the horizontal magnetic force line direction during the through-type detector process. At this time, the cross section of the metal panel or the mobile phone passing through the horizontal magnetic force line is very small, and the magnetic force line passing through is less. Therefore, the eddy current effect is small, and the eddy current signal detected is weak. This may lead to the phenomenon of missed judgment of the detector, and the reliability of the detection result is greatly reduced. That is, the traditional through-type detector cannot guarantee that the metal panel or the mobile phone can be detected in any posture. SUMMARY

[0003] The present application provides a coil structure of through-type detector and a through-type detector, which improves the detection reliability of the through-type detector and reduces the missed judgment.

[0004] In one aspect, the present application provides a coil structure of through-type detector, characterized in that it comprises: a pair of bilateral opposite transmission coil groups, and an intermediate channel formed between the two for passing the detected object.

[0005] One of the unilateral transmission coil groups comprises a matrix structure of at least two rows of coils and at least two columns of coils. One row of coils comprises at least two coils, and one column of coils comprises at least two coils. The normal directions of the adjacent two coils in the horizontal direction are opposite at the same time, and the normal directions of the adjacent two coils in the vertical direction are opposite at the same time.

[0006] In the three-dimensional space of the intermediate channel, the normal directions of the coils of the bilateral transmission coil groups in some areas are opposite, and the normal directions of the coils of the bilateral transmission coil groups in some areas are the same, forming electromagnetic fields in x, y and z directions.

[0007] In the scheme, one single-side transmitting coil group has a matrix coil layout. Since the normal directions of two adjacent coils in the single-side transmitting coil group in the horizontal direction are opposite at the same time, the normal directions of the other single-side transmitting coil group are respectively opposite to the normal directions of the two adjacent coils in the horizontal direction, and one is the same direction and the other is the opposite direction at the same time; the same direction generates the horizontal magnetic force line of the x-axis, and the opposite direction generates the horizontal magnetic force line of the y-axis.

[0008] The normal directions of the other single-side transmitting coil group are respectively opposite to the normal directions of the two adjacent coils in the horizontal direction, and one is the same direction and the other is the opposite direction at the same time; the normal directions of the other single-side transmitting coil group are respectively opposite to the normal directions of the two adjacent coils in the vertical direction, and both are the same direction or the opposite direction at the same time; the same direction of the normal directions of the double-side transmitting coils in one column and the opposite direction of the normal directions of the double-side transmitting coils in another column, because the normal directions of the two adjacent coils in the vertical direction of the single-side transmitting coil group are opposite at the same time, thus the magnetic force lines of the upper and lower coils in the column with the opposite direction of the normal directions of the double-side transmitting coils form a ring magnetic field, and the double-side ring magnetic fields are relatively pressed on the z-axis and offset, generating the magnetic force line in the z-axis direction.

[0009] Therefore, when the maximum cross section of the metal plate or the mobile phone can pass through more magnetic force lines in any direction of the x, y and z directions, a stronger eddy current signal is generated, thereby improving the reliability of the coil structure in detecting the metal thin plate or the mobile phone and avoiding missed judgment.

[0010] Preferably, the other single-side transmitting coil group comprises a matrix structure of at least two rows of coils and one column of coils, and one row of coils is one coil, and the normal directions of the two adjacent coils are opposite at the same time.

[0011] Preferably, the other single-side transmitting coil group comprises a matrix structure of one row of coils and at least two columns of coils, and one column of coils is one coil, and the normal directions of the two adjacent coils are opposite at the same time.

[0012] As an improvement of the above scheme, the upper and / or bottom of the double-side or single-side transmitting coil group is respectively provided with a coil.

[0013] Preferably, the magnetic induction lines of the plurality of adjacent transmitting coils are in the same direction, which is equivalent to one transmitting coil.

[0014] As an improvement of the above scheme, the coils of the single-side and / or double-side transmitting coil group are electrically connected or disconnected.

[0015] In another aspect, the present application provides a through-type detector, comprising a main body structure, a main machine and a coil structure for the through-type detector connected to the main machine in the main body structure, characterized in that the coil structure comprises two opposite transmitting coil groups forming an intermediate channel for the detected object.

[0016] One of the single-side transmitting coil groups comprises a matrix structure of at least two rows of coils and at least two columns of coils, one row of coils comprises at least two coils, and one column of coils comprises at least two coils; the normal directions of two adjacent coils in the horizontal direction are opposite at the same time, and the normal directions of two adjacent coils in the vertical direction are opposite at the same time.

[0017] In the three-dimensional space of the intermediate channel, the normal directions of the coils of the two opposite transmitting coil groups in some areas are opposite, and the normal directions of the coils of the two opposite transmitting coil groups in some areas are the same, forming electromagnetic fields in x, y and z directions.

[0018] Compared with the prior art, the present application has the following beneficial effects: in the intermediate channel of the detector, the current in the coil is alternating current, the single-side transmitting coil group is a block structure, the single-side transmitting coil group is composed of different transmitting coil blocks, the left and right two opposite transmitting coil groups have different structures, in the single-side transmitting coil group, the normal directions of the winding directions of the adjacent transmitting coil blocks in the horizontal direction are opposite at the same time, and the normal directions of the winding directions of the adjacent transmitting coil blocks in the vertical direction are opposite at the same time, in the three-dimensional space of the intermediate channel, there are some areas where the normal directions of the winding directions of the left and right transmitting groups are opposite in the area, and some areas where the normal directions of the winding directions of the left and right transmitting groups are the same in the area, forming electromagnetic fields in x, y and z directions in the detection area, and using the divergent magnetic field generated in the area where the normal directions of the winding directions of the left and right transmitting groups are opposite and the same direction magnetic field generated in the area where the normal directions of the winding directions of the left and right transmitting groups are the same, the metal panel passing through the security channel in different poses is detected. At the same time, under the condition of the same direction magnetic field, the problem that it is difficult to detect the metal panel parallel to the transmitting coil when passing through the security channel under the condition of the divergent magnetic field is solved, and under the condition of the divergent magnetic field, the problem that it is difficult to detect the metal panel perpendicular to the transmitting coil when passing through the security channel under the condition of the same direction magnetic field is solved, the two are complementary, greatly improving the reliability of metal detection, effectively avoiding the missed detection and wrong detection of the through-type detector, and ensuring the smooth progress of security work. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the coil structure of the through-type detector of the present application;

[0020] Figure 2 is a first cross-sectional front view of the first example of the coil structure of the through-type detector of the present application;

[0021] Figure 3 is a second cross-sectional front view of a first example of a coil structure of a through-type probe according to the present application;

[0022] Figure 4 is a third cross-sectional front view of a first example of a coil structure of a through-type probe according to the present application;

[0023] Figure 5 is a top view of a first example of a coil structure of a through-type probe according to the present application;

[0024] Figure 6 is a bottom view of a first example of a coil structure of a through-type probe according to the present application;

[0025] Figure 7 is a schematic diagram of a total magnetic field of a first example of a coil structure of a through-type probe according to the present application;

[0026] Figure 8 is a schematic diagram of a second example of a coil structure of a through-type probe according to the present application;

[0027] Figure 9 is a schematic diagram of a third example of a coil structure of a through-type probe according to the present application;

[0028] Figure 10 is a schematic diagram of a fourth example of a coil structure of a through-type probe according to the present application;

[0029] Figure 11 is a schematic diagram of a fifth example of a coil structure of a through-type probe according to the present application;

[0030] Figure 12 is a schematic diagram of a sixth example of a coil structure of a through-type probe according to the present application;

[0031] Figure 13 is a schematic diagram of a seventh example of a coil structure of a through-type probe according to the present application;

[0032] Figure 14 is a schematic diagram of an eighth example of a coil structure of a through-type probe according to the present application;

[0033] Figure 15 is a schematic diagram of a ninth example of a coil structure of a through-type probe according to the present application. DETAILED DESCRIPTION

[0034] 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.

[0035] The coil structure of the through-type detector according to various embodiments of the present application comprises 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 to the receiving coil in an electromagnetic coupling manner. The transmitting coil 1 and the transmitting coil 2 are respectively located on both sides of the door plate of the through-type detector 300 and oppositely arranged, and an intermediate passage for passing the measured object is formed between the two transmitting coils. The coil current of the transmitting coil group 1 and the transmitting coil group 2 is an alternating current. When an excitation signal is transmitted through the transmitting coil, an induced signal is generated in the receiving coil. The current in the transmitting coil group is an alternating current, and the induced voltage value of the receiving coil is used to detect the measured object.

[0036] The coil structure of the through-type detector and all embodiments of the through-type detector formed by the coil structure comply with the following rules:

[0037] In terms of the size of the coil shape, the size of the transmitting coil 1 and the transmitting coil 2 can be equal or unequal.

[0038] In terms of the number of turns, the number of turns of the transmitting coil 1 and the transmitting coil 2 can be equal or unequal.

[0039] In terms of the position, the center positions of the transmitting coil 1 and the transmitting coil 2 can coincide or not coincide after being rotated by 180 degrees along the z-axis.

[0040] In terms of the wiring, different transmitting coils in the same transmitting coil group can be actually electrically connected or not.

[0041] Reference Figure 1 , Figure 1 is a schematic diagram of the first embodiment of the coil structure of the through-type detector according to the present application. The transmitting coil group 1 and the transmitting coil group 2 of the coil structure of the through-type detector are different in structure, and the two groups form a double-side transmitting coil group. Each transmitting coil group is composed of different transmitting coil blocks. The transmitting coil group 1 is composed of a transmitting coil block 111 and a transmitting coil block 112 to form a single-side transmitting coil group. The transmitting coil group 2 is composed of a transmitting coil block 211, a transmitting coil block 212, a transmitting coil block 221, a transmitting coil block 222, a transmitting coil block 231 and a transmitting coil block 232 to form another single-side transmitting coil group. The single-side transmitting coil group is a coil wound in the same direction by the same wire (current), i.e., the coils are electrically connected.

[0042] As Figure 1The rectangular coordinate system is shown, the transmitting coil group 1 and the transmitting coil group 2 are parallel to the y-axis and the z-axis, perpendicular to the x-axis, and the transmitting coil block 111 is counterclockwise winding, the transmitting coil block 112 is clockwise winding, the transmitting coil block 211 is counterclockwise winding, the transmitting coil block 221 is clockwise winding, the transmitting coil block 231 is counterclockwise winding, the transmitting coil block 212 is clockwise winding, the transmitting coil block 222 is counterclockwise winding, and the transmitting coil block 232 is clockwise winding, according to the right-hand rule, the normal direction of the coil winding direction is the magnetic induction line direction, the magnetic induction lines generated by the transmitting coil block 112, the transmitting coil block 221, the transmitting coil block 212 and the transmitting coil block 232 are parallel along the positive direction of the x-axis, and the magnetic induction lines generated by the transmitting coil block 111, the transmitting coil block 211, the transmitting coil block 231 and the transmitting coil block 222 are parallel along the negative direction of the x-axis. In the single-side transmitting group, in the horizontal direction, the magnetic induction line directions generated by the transmitting coil block 211 and the transmitting coil block 221 are opposite at the same time, the magnetic induction line directions generated by the transmitting coil block 221 and the transmitting coil block 231 are opposite at the same time, the magnetic induction line directions generated by the transmitting coil block 212 and the transmitting coil block 222 are opposite at the same time, and the magnetic induction line directions generated by the transmitting coil block 222 and the transmitting coil block 232 are opposite at the same time; in the vertical direction, the magnetic induction line directions generated by the transmitting coil block 211 and the transmitting coil block 212 are opposite at the same time, the magnetic induction line directions generated by the transmitting coil block 221 and the transmitting coil block 222 are opposite at the same time, the magnetic induction line directions generated by the transmitting coil block 231 and the transmitting coil block 232 are opposite at the same time, and the magnetic induction line directions generated by the transmitting coil block 111 and the transmitting coil block 112 are opposite at the same time. In the three-dimensional space of the middle channel, the magnetic induction line directions generated by the coils in the area covered by the transmitting coil block 221 and the transmitting coil block 111 are opposite, the magnetic induction line directions generated by the coils in the area covered by the transmitting coil block 222 and the transmitting coil block 112 are opposite, the magnetic induction line directions generated by the coils in the area covered by the transmitting coil block 211 and the transmitting coil block 111 are the same, the magnetic induction line directions generated by the coils in the area covered by the transmitting coil block 212 and the transmitting coil block 112 are the same, the magnetic induction line directions generated by the coils in the area covered by the transmitting coil block 231 and the transmitting coil block 111 are the same, and the magnetic induction line directions generated by the coils in the area covered by the transmitting coil block 232 and the transmitting coil block 112 are the same.

[0043] Please refer to Figure 2 , Figure 2is the first cross-sectional front view of the first example of the coil structure of the through-type probe of the present application, which is a front view of the cross-sectional area covered by the transmitting coil block 211, the transmitting coil block 212, the transmitting coil block 111 and the transmitting coil block 112. The magnetic induction lines generated by the transmitting coil block 211 and the transmitting coil block 111 are both parallel to the negative direction of the x-axis, and under the joint action of the two transmitting coils, part of the magnetic induction lines pass through the transmitting coil block 111 and the transmitting coil block 211 along the negative direction of the x-axis, forming a magnetic field in the x-axis direction; the magnetic induction lines generated by the transmitting coil block 212 and the transmitting coil block 112 are both parallel to the positive direction of the x-axis, and under the joint action of the two transmitting coils, part of the magnetic induction lines pass through the transmitting coil block 212 and the transmitting coil block 112 along the positive direction of the x-axis, forming a magnetic field in the x-axis direction. According to the right-hand rule, the current at the upper end of the transmitting coil block 211, the lower end of the transmitting coil block 212, the upper end of the transmitting coil block 111 and the lower end of the transmitting coil block 112 is perpendicular to the paper and inward, forming a ring-shaped magnetic field around these line segments, and the magnetic induction lines are in the clockwise direction, forming a magnetic field in the z-axis direction at the area where the magnetic induction lines are tangent to the z-axis parallel straight line; the current at the lower end of the transmitting coil block 211, the upper end of the transmitting coil block 212, the lower end of the transmitting coil block 111 and the upper end of the transmitting coil block 112 is perpendicular to the paper and outward, forming a ring-shaped magnetic field around these line segments, and the magnetic induction lines are in the counterclockwise direction, forming a magnetic field in the z-axis direction at the area where the magnetic induction lines are tangent to the z-axis parallel straight line. Therefore, there are magnetic fields in the x-axis and z-axis directions in this area.

[0044] Please refer to Figure 3 , Figure 3 is the second cross-sectional front view of the first example of the coil structure of the through-type probe of the present application, which is a front view of the cross-sectional area covered by the transmitting coil block 221, the transmitting coil block 222, the transmitting coil block 111 and the transmitting coil block 112. The magnetic induction lines generated by the transmitting coil block 221 are parallel to the positive direction of the x-axis, the magnetic induction lines generated by the transmitting coil block 111 are parallel to the negative direction of the x-axis, the magnetic induction lines generated by the transmitting coil block 222 are parallel to the negative direction of the x-axis, and the magnetic induction lines generated by the transmitting coil block 112 are parallel to the positive direction of the x-axis. Since the directions of the magnetic induction lines generated by the transmitting coil block 221 and the transmitting coil block 111 are opposite, under the action of the two transmitting coils, the magnetic induction lines are deflected to the z-axis parallel direction, forming a magnetic field in the z-axis direction, and since the directions of the magnetic induction lines generated by the transmitting coil block 222 and the transmitting coil block 112 are opposite, under the action of the two transmitting coils, a magnetic field in the z-axis direction is also formed. Therefore, there is a magnetic field in the z-axis direction in this area.

[0045] Please refer to Figure 4 , Figure 4is the third sectional front view of the first example of the coil structure of the through type probe of the present application, which is the front view of the sectional area covered by the transmitting coil block 231, the transmitting coil block 232, the transmitting coil block 111 and the transmitting coil block 112. The magnetic induction lines generated by the transmitting coil block 231 and the transmitting coil block 111 are parallel along the negative direction of the x axis, and under the joint action of the two transmitting coils, part of the magnetic induction lines pass through the transmitting coil block 111 and the transmitting coil block 231 along the negative direction of the x axis, forming a magnetic field in the x axis direction. The magnetic induction lines generated by the transmitting coil block 232 and the transmitting coil block 112 are parallel along the positive direction of the x axis, and under the joint action of the two transmitting coils, part of the magnetic induction lines pass through the transmitting coil block 232 and the transmitting coil block 112 along the positive direction of the x axis, forming a magnetic field in the x axis direction. According to the right-hand rule, the current at the upper end of the transmitting coil block 231, the lower end of the transmitting coil block 232, the upper end of the transmitting coil block 111 and the lower end of the transmitting coil block 112 is perpendicular to the paper and inward, forming a ring-shaped magnetic field around these line segments, and the magnetic induction lines are along the clockwise direction, and in the area where the magnetic induction lines are tangent to the z axis parallel straight line, a magnetic field in the z axis direction is formed. In the area where the magnetic induction lines are tangent to the z axis parallel straight line, a magnetic field in the z axis direction is formed. Therefore, in this area, there are magnetic fields in the x axis and z axis directions.

[0046] Please refer to Figure 5 , Figure 5 is the top view of the first example of the coil structure of the through type probe of the present application. The magnetic induction lines generated by the transmitting coil block 231, the transmitting coil block 211 and the transmitting coil block 111 are parallel along the negative direction of the x axis, and the magnetic induction lines generated by the transmitting coil block 221 are parallel along the positive direction of the x axis. In the area covered by the transmitting coil block 231 and the transmitting coil block 111, the directions of the magnetic induction lines are the same, part of the magnetic induction lines pass through the transmitting coil block 111 and the transmitting coil block 231 along the negative direction of the x axis, forming a magnetic field in the x axis direction. In the area covered by the transmitting coil block 211 and the transmitting coil block 111, the directions of the magnetic induction lines are the same, part of the magnetic induction lines pass through the transmitting coil block 111 and the transmitting coil block 221 along the negative direction of the x axis, forming a magnetic field in the x axis direction. In the area covered by the transmitting coil block 221 and the transmitting coil block 111, the directions of the magnetic induction lines are opposite, the magnetic induction lines deflect towards the y axis parallel direction in the middle of the channel, and a magnetic field in the y axis direction is generated in this area. Therefore, in this area, there are magnetic fields in the x axis and y axis directions.

[0047] Please refer to Figure 6 , Figure 6is the bottom view of the first example of the coil structure of the through-type detector of the present application. The magnetic induction direction generated by the transmitting coil block 212, the transmitting coil block 232 and the transmitting coil block 112 are all parallel to the positive direction of the x-axis, the magnetic induction direction generated by the transmitting coil block 222 are all parallel to the negative direction of the x-axis, the magnetic induction directions generated by the transmitting coil block 212 and the transmitting coil block 112 are the same, part of the magnetic induction passes through the transmitting coil block 212 and the transmitting coil block 112 along the positive direction of the x-axis, forming the magnetic field in the x-axis direction. The magnetic induction directions generated by the transmitting coil block 232 and the transmitting coil block 112 are the same, part of the magnetic induction passes through the transmitting coil block 232 and the transmitting coil block 112 along the positive direction of the x-axis, forming the magnetic field in the x-axis direction. The magnetic induction directions generated by the transmitting coil block 222 and the transmitting coil block 112 are opposite, the magnetic induction deflects to the y-axis parallel direction in the middle of the channel, generating the magnetic field in the y-axis direction in this area. Therefore, the magnetic fields in the x-axis and y-axis directions exist in this area.

[0048] Please refer to Figure 7 , Figure 7 is the schematic diagram of the overall magnetic field of the first example of the coil structure of the through-type detector of the present application. Since the magnetic fields in the x, y and z-axis directions exist in the middle of the channel at the same time, the effective eddy current magnetic field can be generated for the measured object no matter in any posture through the detector, greatly improving the detection rate of the measured object and improving the reliability of the through-type detector.

[0049] On the winding rule, along the positive direction of the x-axis, each transmitting coil block can adopt the clockwise winding method or the counterclockwise winding method, but the normal direction of the coil winding direction of the adjacent transmitting coil blocks in the horizontal direction should be opposite at the same time, and the normal direction of the coil winding direction of the adjacent transmitting coil blocks in the vertical direction should be opposite at the same time.

[0050] The layout of the transmitting coil group 1 and the transmitting coil group 2 can have various design forms.

[0051] Please refer to Figure 8 , Figure 8is a schematic diagram of a second example of the coil structure of the through-type probe of the present application. Embodiment two differs from embodiment one only in that the winding direction of the coils corresponding to each coil is opposite. Specifically, as viewed along the positive direction of the x-axis, the transmitting coil block 111 is counterclockwise winding, the transmitting coil block 112 is clockwise winding, the transmitting coil block 211 is clockwise winding, the transmitting coil block 221 is counterclockwise winding, the transmitting coil block 231 is clockwise winding, the transmitting coil block 212 is counterclockwise winding, the transmitting coil block 222 is clockwise winding, the transmitting coil block 232 is counterclockwise winding, the magnetic induction lines generated by the transmitting coil block 111, the transmitting coil block 221, the transmitting coil block 212 and the transmitting coil block 232 are parallel along the negative direction of the x-axis, and the magnetic induction lines generated by the transmitting coil block 112, the transmitting coil block 211, the transmitting coil block 231 and the transmitting coil block 222 are parallel along the negative direction of the x-axis. The magnetic induction lines in the area simultaneously covered by the transmitting coil block 221 and the transmitting coil block 111 and the area simultaneously covered by the transmitting coil block 222 and the transmitting coil block 112 are in the same direction, so a magnetic field in the x-axis direction is generated in these areas; the magnetic induction lines in the area simultaneously covered by the transmitting coil block 211 and the transmitting coil block 111, the area simultaneously covered by the transmitting coil block 212 and the transmitting coil block 112, the area simultaneously covered by the transmitting coil block 231 and the transmitting coil block 111 and the area simultaneously covered by the transmitting coil block 232 and the transmitting coil block 112 are in opposite directions, so a magnetic field in the y-axis and z-axis directions is generated in these areas, so magnetic fields in the x, y and z directions exist in the detection area.

[0052] Reference Figure 9 , Figure 9 is a schematic diagram of a third example of the coil structure of the through-type probe of the present application. Embodiment three differs from embodiment two only in that the positions of the double-side transmitting coil groups are mirror images. Specifically, the magnetic induction lines in the area simultaneously covered by the transmitting coil block 111 and the transmitting coil block 211, the area simultaneously covered by the transmitting coil block 111 and the transmitting coil block 231, the area simultaneously covered by the transmitting coil block 112 and the transmitting coil block 212 and the area simultaneously covered by the transmitting coil block 112 and the transmitting coil block 232 are in the same direction, and the magnetic induction lines in the area simultaneously covered by the transmitting coil block 111 and the transmitting coil block 221 and the area simultaneously covered by the transmitting coil block 112 and the transmitting coil block 222 are in opposite directions.

[0053] Reference Figure 10 , Figure 10is a schematic diagram of a fourth example of the coil structure of the through-type probe of the present application. The difference between embodiment four and embodiment two is that the transmitting coil group 2 is increased by one column of coil groups 241, 242. Specifically, the magnetic induction direction is the same in the area covered by the transmitting coil block 221 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 241 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 222 and the transmitting coil block 112 simultaneously, and the area covered by the transmitting coil block 242 and the transmitting coil block 112 simultaneously; and the magnetic induction direction is opposite in the area covered by the transmitting coil block 211 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 231 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 212 and the transmitting coil block 112 simultaneously, and the area covered by the transmitting coil block 232 and the transmitting coil block 112 simultaneously.

[0054] Reference Figure 11 , Figure 11 is a schematic diagram of a fifth example of the coil structure of the through-type probe of the present application. The difference between embodiment five and embodiment one is that the transmitting coil group 2 is increased by one row of coils 213, 223, 233. Specifically, the magnetic induction direction is the same in the area covered by the transmitting coil block 211 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 231 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 212 and the transmitting coil block 112 simultaneously, the area covered by the transmitting coil block 232 and the transmitting coil block 112 simultaneously, the area covered by the transmitting coil block 213 and the transmitting coil block 113 simultaneously, and the area covered by the transmitting coil block 233 and the transmitting coil block 113 simultaneously; and the magnetic induction direction is opposite in the area covered by the transmitting coil block 221 and the transmitting coil block 111 simultaneously, the area covered by the transmitting coil block 222 and the transmitting coil block 112 simultaneously, and the area covered by the transmitting coil block 223 and the transmitting coil block 113 simultaneously.

[0055] The number of blocks in the horizontal direction in the transmitting coil group 1 and the transmitting coil group 2 can be increased or decreased as needed.

[0056] The number of blocks in the vertical direction in the transmitting coil group 1 and the transmitting coil group 2 can be increased or decreased as needed.

[0057] Reference Figure 12 , Figure 12 is a schematic diagram of a sixth example of the coil structure of the through-type probe of the present application. The difference between embodiment six and embodiment one is that each coil in the double-side transmitting coil group is an independent coil, and there is no electrical connection.

[0058] The winding method and position of the transmitting coil group 1 and the transmitting coil group 2 are the same as the first example of the coil structure of the through-type probe of the present application, which will not be repeated here. For the transmitting coil group 1, there is no actual electrical connection between the transmitting coil block 111 and the transmitting coil block 112; for the transmitting coil group 2, there is no actual electrical connection between the transmitting coil block 211, the transmitting coil block 212, the transmitting coil block 221, the transmitting coil block 222, the transmitting coil block 231 and the transmitting coil block 232.

[0059] Please refer to Figure 13 , Figure 13 is a schematic diagram of the seventh example of the coil structure of the through-type probe of the present application. The difference between example seven and example six is only that if multiple adjacent transmitting coil blocks have the same magnetic induction line direction in the coil, they can be equivalent to one transmitting coil block. Specifically, the winding method and position of the transmitting coil block 111, the transmitting coil block 112, the transmitting coil block 212, the transmitting coil block 221, the transmitting coil block 222, the transmitting coil block 231 and the transmitting coil block 232 are the same as the sixth example of the coil structure of the through-type probe of the present application, which will not be repeated here. The transmitting coil block 211a and the transmitting coil block 211b have the same magnetic induction line direction, and their effect in the transmitting coil can be equivalent to one transmitting coil block 211. The transmitting coil block 211 has the same magnetic induction line direction as the transmitting coil block 211a and 211b, and in the horizontal direction, the magnetic induction line direction of the transmitting coil block 211 and the transmitting coil block 221 is opposite at the same time, and in the vertical direction, the magnetic induction line direction of the transmitting coil block 211 and the transmitting coil block 212 is opposite at the same time.

[0060] Please refer to Figure 14 , Figure 14 is a schematic diagram of the eighth example of the coil structure of the through-type probe of the present application. The difference between example eight and example one is only that the number of the transmitting coil group 1 and the transmitting coil group 2 can be set according to the needs. Specifically, the winding method and position of the transmitting coil group 1 and the transmitting coil group 2 are the same as the first example of the coil structure of the through-type probe of the present application, which will not be repeated here. This example has two transmitting coil groups, i.e. two transmitting coil group 1 and two transmitting coil group 2.

[0061] Please refer to Figure 15 , Figure 15 is a schematic diagram of the ninth example of the coil structure of the through-type probe of the present application. The difference between example nine and example one is only that in addition to the transmitting coil group 1 and the transmitting coil group 2, there can be other structure transmitting coil groups in the probe. Specifically, the winding method and position of the transmitting coil group 1 and the transmitting coil group 2 are the same as the first example of the coil structure of the through-type probe of the present application, which will not be repeated here. In addition to the transmitting coil group 1 and the transmitting coil group 2, there are also transmitting coil group 3, transmitting coil group 4, transmitting coil group 5 and transmitting coil group 6 with different coil structures in other areas.

[0062] In another aspect, embodiment ten provides a through-type detector, comprising a detector housing and a transmitting coil group, a receiving coil and a main machine mounted on the controller housing, a security channel is arranged in the middle of the detector housing, the transmitting coil group 1 and the transmitting coil group 2 of the transmitting coil group are arranged on the two sides of the security channel respectively, the transmitting coil group and the receiving coil are connected in an electromagnetic coupling manner, and the transmitting coil group and the receiving coil are electrically connected with the main machine. Wherein, the current of the coil in the transmitting coil group is alternating current, the single-side transmitting coil group is a block structure, the transmitting coil group 1 is composed of transmitting coil block 111 and transmitting coil block 112, the transmitting coil group 2 is composed of transmitting coil block 211, transmitting coil block 221, transmitting coil block 231, transmitting coil block 212, transmitting coil block 222 and transmitting coil block 232, the structure of the transmitting coil group 1 and the transmitting coil group 2 is different, for the transmitting coil group 1, the normal direction of the winding direction of the transmitting coil block 111 and the transmitting coil block 112 is opposite at the same time in the vertical direction, for the transmitting coil 2, in the horizontal direction, the normal direction of the winding direction of the transmitting coil block 211 and the transmitting coil block 221 is opposite at the same time, the normal direction of the winding direction of the transmitting coil block 221 and the transmitting coil block 231 is opposite at the same time, the normal direction of the winding direction of the transmitting coil block 212 and the transmitting coil block 222 is opposite at the same time, the normal direction of the winding direction of the transmitting coil block 222 and the transmitting coil block 232 is opposite at the same time; in the vertical direction, the normal direction of the winding direction of the transmitting coil block 211 and the transmitting coil block 212 is opposite at the same time, the normal direction of the winding direction of the transmitting coil block 221 and the transmitting coil block 222 is opposite at the same time, the normal direction of the winding direction of the transmitting coil block 231 and the transmitting coil block 232 is opposite at the same time. In the three-dimensional space of the middle channel, the normal direction of the winding direction of the coil in the area covered by the transmitting coil block 221 and the transmitting coil block 111 is opposite in this area, the normal direction of the winding direction of the coil in the area covered by the transmitting coil block 222 and the transmitting coil block 112 is opposite in this area, the normal direction of the winding direction of the coil in the area covered by the transmitting coil block 211 and the transmitting coil block 111 is the same in this area, the normal direction of the winding direction of the coil in the area covered by the transmitting coil block 231 and the transmitting coil block 111 is the same in this area, the normal direction of the winding direction of the coil in the area covered by the transmitting coil block 212 and the transmitting coil block 112 is the same in this area, the normal direction of the winding direction of the coil in the area covered by the transmitting coil block 232 and the transmitting coil block 112 is the same in this area, forming an electromagnetic field in x, y and z directions in the detection area.

[0063] The through-type detector comprises a coil structure, and the specific embodiments refer to embodiments one to nine, which will not be repeated here.

[0064] The coil structure of the application is used for building a through type detector, which can effectively solve the problem of high false negative rate in the through type detector, and greatly improve the reliability and detection efficiency of the through type detector.

[0065] The above is the preferred embodiment of the application, it should be pointed out that, for those skilled in the art, without departing from the principles of the application, can make a number of improvements and refinements, these improvements and refinements are also considered to be within the scope of the application.

Claims

1. A coil structure of a magnetic field probe, characterized by comprising: The coil structure comprises: a pair of bilateral transmission coil groups arranged oppositely, forming a middle passage for passing through the measured object between the two groups; one of the single transmission coil groups comprises a matrix structure of at least two rows of coils and at least two columns of coils, the normal directions of two adjacent coils in the horizontal direction are opposite at the same time, and the normal directions of two adjacent coils in the vertical direction are opposite at the same time; the other single transmission coil group comprises a matrix structure of at least two rows of coils and one column of coils, one row of coils is one coil, and the normal directions of two adjacent coils are opposite at the same time; the current directions of the local adjacent coils of the single transmission coil are in the same direction; in the three-dimensional space of the middle passage, the normal directions of the coils of the bilateral transmission coil groups in some areas are opposite, and the normal directions of the coils of the bilateral transmission coil groups in some areas are the same, forming electromagnetic fields in x, y and z directions. the other single transmission coil group comprises a matrix structure of one row of coils and at least two columns of coils, one column of coils is one coil, and the normal directions of two adjacent coils are opposite at the same time. the upper part and / or the bottom part of the bilateral or single transmission coil group are respectively provided with coils.

2. The coil structure of a through-type probe according to claim 1, wherein a plurality of adjacent transmission coils with the same magnetic induction line direction are equivalent to one transmission coil.

3. The coil structure of a through-type probe according to claim 1, wherein the coils of any single transmission coil group are electrically connected or disconnected.

4. The through-type probe of claim 1, wherein the coil structure is formed by a plurality of turns of a wire wound around the probe body. The coil structure comprises:

5. The coil structure of a through-type probe according to any one of claims 1 to 4, wherein a pair of bilateral transmission coil groups arranged oppositely, forming a middle passage for passing through the measured object between the two groups; 6. A through-type probe comprising a main body structure, a main coil structure provided in the main body structure, and a coil structure for the through-type probe connected to the main coil structure, characterized by one of the single transmission coil groups comprises a matrix structure of at least two rows of coils and at least two columns of coils, the normal directions of two adjacent coils in the horizontal direction are opposite at the same time, and the normal directions of two adjacent coils in the vertical direction are opposite at the same time; the other single transmission coil group comprises a matrix structure of at least two rows of coils and one column of coils, one row of coils is one coil, and the normal directions of two adjacent coils are opposite at the same time; the current directions of the local adjacent coils of the single transmission coil are in the same direction; in the three-dimensional space of the middle passage, the normal directions of the coils of the bilateral transmission coil groups in some areas are opposite, and the normal directions of the coils of the bilateral transmission coil groups in some areas are the same, forming electromagnetic fields in x, y and z directions. the other single transmission coil group comprises a matrix structure of one row of coils and at least two columns of coils, one column of coils is one coil, and the normal directions of two adjacent coils are opposite at the same time.

7. The through-type probe according to claim 6, wherein the upper part and / or the bottom part of the bilateral or single transmission coil group are respectively provided with coils.

8. The through-type probe according to claim 6, wherein a plurality of adjacent transmission coils with the same magnetic induction line direction are equivalent to one transmission coil.

9. The through-type probe of claim 6, wherein the coils of any single transmission coil group are electrically connected or disconnected.

10. A through-probe according to any one of claims 6-9, characterized in that ​

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