Central controller and through-type detection device

Abstract

The utility model discloses a central controller and a through-type detection device. The central controller comprises a shell and a host arranged in the shell. The host comprises a case and a plurality of circuit boards arranged in the case; the case is hollow and is provided with a first ventilation opening and a second ventilation opening which penetrate through the interior; the shell is provided with an air inlet and an air outlet, the first ventilation opening is communicated with the air inlet, and the second ventilation opening is communicated with the air outlet. The central controller provided by the utility model is used for discharging airflow entering the first ventilation opening out of the case through the second ventilation opening after passing through the plurality of circuit boards. According to the central controller provided by the utility model, the heat generated and gathered by each circuit board in the case is effectively reduced, the adverse phenomenon of carbonization or burnout of each circuit board due to untimely heat dissipation is avoided, the service life of the central controller is prolonged, and the sensitivity and reliability of the through-type detection device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of security inspection equipment, in particular to a central controller and a pass-through detection device. Background Art

[0002] A pass-through detection device can detect whether a person is carrying metal objects, such as a metal detection door. When the metal objects carried by a person exceed the pre-set parameter value based on weight, quantity or shape, the pass-through detection device will alarm. Pass-through detection devices are widely used and are commonly seen in public places with large crowds such as airports, stations and large conferences. During frequent use, the circuit boards in its central controller will inevitably generate a lot of heat, which will cause the circuit boards to carbonize or even burn over time, seriously affecting the sensitivity and reliability of the pass-through detection device. Utility Model Content

[0003] In view of the above problems, an object of the embodiments of the present utility model is to provide a central controller and a pass-through detection device.

[0004] In a first aspect, an embodiment of the utility model provides a central controller, comprising: a housing and a host disposed in the housing, wherein the housing comprises a frame structure, and the host is disposed in the frame structure;

[0005] The host comprises a chassis and a plurality of circuit boards arranged in the chassis; the chassis is hollow and is provided with a first vent and a second vent that penetrate the interior;

[0006] The housing is provided with an air inlet and an air outlet, the first air outlet is communicated with the air inlet, and the second air outlet is communicated with the air outlet.

[0007] In one embodiment, the first vent is opposite to the air inlet, and / or the second vent is opposite to the air outlet.

[0008] In one embodiment, the host is arranged along a first axis; the housing includes a first side surface and a second side surface that are opposite to each other, and a line between a center of the first side surface and a center of the second side surface coincides with the first axis.

[0009] In one embodiment, the chassis includes a first section and a second section; a first end of the first section is connected to a first end of the second section, and the first section is connected to the second section;

[0010] The first vent is disposed at the second end of the first section;

[0011] The second vent is disposed at the second end of the second section; and the height of the second vent is higher than that of the first vent.

[0012] In one embodiment, the host further comprises: a first fan assembly;

[0013] The first fan assembly is disposed at the first vent and faces the air inlet of the housing.

[0014] In one embodiment, the host further comprises: a second fan assembly;

[0015] The second fan assembly is disposed at a position where the first section and the second section are connected, and faces the air outlet on the outer shell; or, the second fan assembly is disposed at a second vent of the second section, and faces the air outlet on the outer shell.

[0016] In one embodiment, the plurality of circuit boards include: a first circuit board and a second circuit board; the heat generated by the first circuit board during operation is higher than the heat generated by the second circuit board;

[0017] The first circuit board is disposed at a position closer to the center of the first vent than the second circuit board is disposed.

[0018] In one embodiment, the plurality of circuit boards are located in the first section; and there is a gap between the circuit boards that are adjacently arranged in a direction perpendicular to the bottom of the housing.

[0019] In one embodiment, the first circuit board includes: a transmitting board and an operational amplifier module; the second circuit board includes: a baseband board and a receiving board;

[0020] The transmitting board, the operational amplifier module, the baseband board and the receiving board are arranged in the first section;

[0021] The operational amplifier module and the transmitting board are stacked up and down;

[0022] The receiving board is adjacent to and parallel to the transmitting board, and there is a gap between the receiving board and the bottom of the chassis; the baseband board is arranged above the transmitting board and the receiving board, and there is a gap between the baseband board and the transmitting board and the receiving board;

[0023] The distances between the operational amplifier module and the transmitting board and the center of the first fan assembly in the horizontal direction are both smaller than the distance between the receiving board and the center of the first fan assembly in the horizontal direction;

[0024] The distances between the operational amplifier module and the transmitting board and the center of the first fan assembly in the vertical direction are both smaller than the distance between the baseband board and the center of the first fan assembly in the vertical direction.

[0025] In one embodiment, a slope surface or an arc-shaped transition surface is further provided at the position where the first section and the second section are connected.

[0026] In a second aspect, an embodiment of the utility model provides a pass-through detection device, comprising a first door panel, a second door panel and a central controller as described above;

[0027] Two sides of the central controller are connected to the first door panel and the second door panel respectively.

[0028] In one embodiment, the chassis is made of magnetic field shielding material.

[0029] The above-mentioned central controller and pass-through detection device provided by the embodiment of the utility model, the central controller can be applied to the pass-through detection device, the interior of the chassis is hollow, and is provided with a first vent and a second vent for air inlet and outlet. The airflow entering the chassis through the first vent continuously takes away the heat generated by each circuit board, and is discharged from the chassis through the second vent. The central controller provided by the embodiment of the utility model integrates multiple circuit boards in a chassis to dissipate heat from the chassis. The heat dissipating airflow will concentrate and pass through the chassis, so that the heat dissipation efficiency is higher, which effectively reduces the heat generated by each circuit board in the chassis, avoids carbonization or burning of each circuit board due to untimely heat dissipation, improves the service life of the central controller, and improves the sensitivity and reliability of the pass-through detection device.

[0030] Furthermore, the plurality of circuit boards are arranged adjacent to each other with intervals therebetween so as to form an air flow channel, thereby making the air flow smoother and improving the heat dissipation efficiency.

[0031] Furthermore, the transmitting board and operational amplifier module, which generate relatively high heat during operation, are arranged at the center position close to the first ventilation port, where the air flow rate is the largest and is more conducive to heat dissipation; for the baseband board and receiving board, which generate relatively low heat, they are arranged in the upper and lower areas close to the center position of the first ventilation port, which can meet their heat dissipation requirements.

[0032] Furthermore, a slope surface or an arc-shaped transition surface is provided at the connection between the first section and the second section of the chassis, so that after the hot air flow passes through multiple circuit boards, it can flow more smoothly to the second fan assembly through the action of the slope surface or the arc-shaped transition surface, and then be discharged from the chassis.

[0033] Furthermore, when the central controller is applied to the through-type detection device, the chassis uses magnetic field shielding materials to prevent the circuit board from interfering with the magnetic field formed when the through-type detection device is working.

[0034] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 This is a schematic diagram of the overall structure of the central controller in the embodiment of the utility model;

[0037] Figure 2 An exploded view of the internal components of the central controller in the embodiment of the utility model;

[0038] Figure 3 An exploded view of the frame structure in the embodiment of the utility model;

[0039] Figure 4 This is a diagram showing the position relationship between the host and the frame structure in the embodiment of the utility model;

[0040] Figure 5 This is a schematic cross-sectional structure diagram of the host in the embodiment of the utility model;

[0041] Figure 6 This is a schematic cross-sectional structure diagram of a central controller in an embodiment of the utility model;

[0042] Figure 7 It is a schematic structural diagram of a through-type detection device in an embodiment of the utility model.

[0043] Description of reference numerals:

[0044] 1. Shell; 2. Host; 3. Frame structure; 4. First skin; 5. Second skin; 6. Third skin; 7. Display screen; 8. First fan assembly; 9. Second fan assembly;

[0045] 21. chassis; 22. baseband board; 23. transmitting board; 24. receiving board; 25. operational amplifier module; 211. first section; 212. second section; 2111. slope surface; 213. first vent; 214. second vent;

[0046] 31. first frame; 32. second frame; 33. connecting rod;

[0047] 41, air outlet; 61, air inlet;

[0048] 10. Central controller; 11. First door panel; 12. Second door panel. DETAILED DESCRIPTION

[0049] This embodiment provides a central controller and a pass-through detection device. Although the drawings show exemplary embodiments of the present disclosure, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] The utility model embodiment provides a central controller 10, referring to Figure 1 , Figure 2 , Figure 4 As shown, it includes: a shell 1 and a host 2 arranged in the shell 1.

[0051] The host 2 includes a chassis 21 and a plurality of circuit boards disposed in the chassis 21. The chassis 21 is hollow and is provided with a first vent 213 and a second vent 214 that penetrate the interior.

[0052] An air inlet 61 and an air outlet 41 are provided on the housing 1 . The first air vent 213 is communicated with the air inlet 61 , and the second air vent 214 is communicated with the air outlet 41 .

[0053] The central controller 10 provided in the embodiment of the utility model can be applied to equipment such as pass-through detection devices and baggage inspection equipment during specific implementation. Such equipment usually generates a large amount of heat due to the usage scenarios, and requires a good heat dissipation design to ensure its reliability and service life.

[0054] The circuit board may be provided with a processor and various related electronic components. If the central controller 10 is applied to a through-type detection device, the circuit board may control the operation of the transmitting coil of the through-type detection device, receive the induction signal of the receiving coil, and identify the target object based on the induction signal. An air duct is provided in the chassis 21, and the two ends of the air duct are respectively connected to the outside of the chassis 21 through the first vent 213 and the second vent 214. The first vent 213 and the second vent 214 may have a variety of design forms, for example, one is a form of directly connecting front and back or left and right in the horizontal direction. Another example is a form of directly connecting up and down in the vertical direction. Another example may be that the first vent 213 and the second vent 214 are in two different directions, one in the horizontal direction and the other in the vertical direction, and they are connected to each other. The corresponding chassis 21 may have a variety of structural forms.

[0055] Reference Figure 2 In the example shown, the first vent 213 is arranged in the horizontal direction, the second vent 214 is arranged in the vertical direction, and the chassis 21 is L-shaped as a whole. Of course, the embodiment of the utility model is not limited to this structural form. Figure 2 This is just an example of one situation.

[0056] In addition, the first vent 213 is connected to the air inlet 61, and the first vent 213 can be directly arranged opposite to the air inlet 61 for communication, or the first vent 213 and the air inlet 61 can be connected through other structures. Similarly, the second vent 214 is directly arranged opposite to the air outlet 41 for communication, or the second vent 214 and the air outlet 41 can be connected through other structures.

[0057] When the central controller 10 is working, the external airflow enters the chassis 21 through the air inlet 61 and the first vent 213, and the airflow flows through multiple circuit boards, continuously taking away the heat generated by the circuit boards, and finally discharges from the chassis 21 through the second vent 214 and the air outlet 41. By setting the above structure in the chassis 21, the airflow can be concentrated through the chassis 21 to dissipate heat for multiple circuit boards, thereby enhancing the effect of continuously taking away the heat emitted by the circuit boards through the airflow, effectively reducing the temperature of the circuit boards themselves, ensuring that the circuit boards are in the normal working temperature range, and improving the reliability of the operation of the central controller 10 and extending the service life.

[0058] Further, the first vent 213 is opposite to the air inlet 61. And / or, the second vent 214 is opposite to the air outlet 41. The protection scope of the present application includes the following three types: The first type: the first vent 213 is opposite to the air inlet 61. The second type: the second vent 214 is opposite to the air outlet 41. The third type: the first vent 213 is opposite to the air inlet 61, and the second vent 214 is opposite to the air outlet 41. All the following with the words "and / or" adopt the above protection method.

[0059] The above-mentioned “relative” can be, for example, that the first vent 213 and the air inlet 61 are completely opposite to each other, or that there is a slight deviation between the first vent 213 and the air inlet 61, that is, partially opposite to each other. Similarly, the second vent 214 and the air outlet 41 can also be completely opposite to each other, or that there is a slight deviation between the second vent 214 and the air outlet 41, that is, partially opposite to each other.

[0060] Further, refer to Figure 2 As shown, the host 2 can be arranged along the direction of the first axis. The housing 1 includes a first side surface and a second side surface opposite to each other, and the line between the center of the first side surface and the center of the second side surface coincides with the first axis. The first axis can be seen in Figure 2 The axis is shown by the dashed line.

[0061] In a specific implementation, for example, in the scenario where the central controller 10 is used as a pass-through detection device, the first side surface and the second side surface can be two side surfaces of the housing 1 located at the front and rear sides respectively along the detection channel direction of the pass-through detection device. The first axis is, for example, the center line of the host 2, and the first axis coincides with the line connecting the center of the first side surface and the center of the second side surface. On the one hand, the host 2 can be centered relative to the two door panels of the pass-through detection device, that is, it is set in the central position of the central controller 10. This setting can ensure that the transmission signals and receiving signals of the door panels on both sides of the pass-through detection device can be connected to the host 2 through signal lines of the same length, so that the respective loss levels are basically the same, and the signal strength of the door panels on both sides is basically consistent. On the other hand, the host 2 is set in the central position of the central controller 10. From the perspective of weight distribution, the two door panels of the pass-through detection device are also more symmetrical, ensuring the mechanical stability of the pass-through detection device.

[0062] Reference Figure 4 As shown, the host 2 can be placed in the central position of the central controller 10 and arranged along the direction of the first axis.

[0063] On the first side and the second side, corresponding functional elements can be arranged according to requirements, such as a cover, a display screen, a warning light, etc. The cover can be a wooden board, which can not only reduce the overall weight of the pass-through detection device, but also play a role in moisture-proof and heat-insulating the chassis 21, thereby ensuring the normal operation of the host 2.

[0064] Specifically, refer to Figure 2 As shown, the first side surface is the surface where the third skin 6 is located, and the second side surface is the surface where the display screen 7 is located. Or conversely, the second side surface is the surface where the third skin 6 is located, and the first side surface is the surface where the display screen 7 is located.

[0065] In one embodiment, referring to Figure 4 , 5 and 6, the chassis 21 of the host 2 includes a first section 211 and a second section 212, the first end of the first section 211 is connected to the first end of the second section 212, and the first section 211 and the second section 212 are connected, so that the first section 211 and the second section 212 are in a through hollow structure.

[0066] The first section 211 may be horizontal or inclined at a certain angle to the horizontal direction. The second section 212 may be vertical or inclined at a certain angle to the vertical direction. The embodiment of the utility model does not limit its specific form. Figure 4-6 In the figure, the first section 211 is horizontally arranged and the second section 212 is vertically arranged, but the above figure is only an example.

[0067] A first vent 213 is disposed on the second end of the first section 211, and a second vent 214 is disposed on the second end of the second section 212, and the height of the second vent 214 is higher than the first vent 213. Since the airflow carrying hot air tends to rise, in this embodiment, the height of the second vent 214 is higher than the first vent 213, so that the hot airflow can be discharged more smoothly and the heat dissipation efficiency is improved.

[0068] The first section 211 and the second section 212 can be formed by being separated and then connected (for example, by welding), or the first section 211 and the second section 212 can be formed in one piece. If the first section 211 is arranged horizontally and the second section 212 is arranged vertically, the height of the second vent 214 is higher than the height of the first vent 213. It can be understood that the first section 211 is inclined at a certain angle relative to the horizontal direction and the second section 212 is arranged vertically; or the first section 211 is arranged horizontally and the second section 212 is inclined at a certain angle relative to the vertical direction; or the first section 211 is inclined at a certain angle relative to the horizontal direction and the second section 212 is inclined at a certain angle relative to the vertical direction. These specific methods can make the height of the second vent 214 higher than the height of the first vent 213.

[0069] In one embodiment, the chassis 21 further includes: a first fan assembly 8 , which is disposed at the first vent 213 and faces the air inlet 61 on the housing 1 .

[0070] The first fan assembly 8 is used to draw external airflow into the chassis 21. The first fan assembly 8 is arranged at the first vent 213. For example, the first fan assembly 8 is arranged at the first vent 213 at the second end of the first section 211. Specifically, the first fan assembly 8 can be a chassis-related structure that is clamped to the periphery of the first vent 213 and is located in the first vent 213, or completely covers the first vent 213, or partially covers the first vent 213. Alternatively, the first fan assembly 8 can also be opposite to the first vent 213 and located in the first section 211.

[0071] The first fan assembly 8 faces the air inlet 61 on the housing 1, for example, the air inlet end of the first fan assembly 8 is completely opposite or partially opposite to the air inlet 61. Figure 2 and Figure 6 In the example shown, further, the first fan assembly 8 faces the air inlet 61 on the third skin 6 .

[0072] In this embodiment, by arranging the first fan assembly 8 near the air inlet 61 , it can be ensured that sufficient airflow is sucked in from the outside to dissipate heat from the chassis 21 .

[0073] In one embodiment, the chassis 21 is further provided with a second fan assembly 9 . The second fan assembly 9 is used to discharge the hot air flow in the chassis 21 .

[0074] The second fan assembly 9 can be arranged in two structural ways. One is that the second fan assembly 9 is arranged at the position where the first section 211 and the second section 212 are connected, and faces the air outlet 41 of the housing 1. For example, referring to Figure 2 and Figure 6 In the example shown, the second fan assembly 9 faces the air outlet 41 on the first skin 4 of the housing 1. With respect to the second fan assembly 9 facing the air outlet 41, for example, the air outlet end of the second fan assembly 9 is completely or partially opposite to the air outlet 41.

[0075] Reference Figure 5 As shown, the second fan assembly 9 is, for example, installed on the upper end surface of the first section 211, opposite to the air outlet 41. In this arrangement, the second fan assembly 9 is not arranged close to the air outlet 41 because the first section 211 is located below the second fan assembly 9, which can provide better support for the second fan assembly 9. The second fan assembly 9 can be better arranged on the housing of the first section 211 and fixed, so as to avoid the second fan assembly 9 from falling off due to loose installation, thereby ensuring the reliability of the overall structure.

[0076] Alternatively, another method is that the second fan assembly 9 is disposed at the second vent 214 of the second section 212 and faces the air outlet 41 on the housing 1. In a specific implementation, one method is, for example, to clamp the second fan assembly 9 to the shell around the second vent 214, and fix the second fan assembly 9 to the shell at the second vent 214 of the second section 212 by means of a card slot or other fixing structural parts. At this time, the second fan assembly 9 can be located in the second vent 214, or completely cover the second vent 214, or partially cover the second vent 214. Another method is, for example, that the second fan assembly 9 is opposite to the second vent 214 and is installed on the upper inner wall of the second section 212.

[0077] In one embodiment, a plurality of circuit boards in the chassis 21 are located in the first section 211 , and there is a gap between the adjacent circuit boards along a direction perpendicular to the bottom of the housing 1 so as to form an air flow channel.

[0078] The direction perpendicular to the bottom of the housing 1 is, for example, the vertical direction. Figure 5 As shown, in the vertical direction, there are gaps between the operational amplifier module 25 and the transmitting board 23 located above it, and between the receiving board 24 and the baseband board 22 located above it, so as to form an air flow channel in the horizontal direction.

[0079] In one embodiment, the plurality of circuit boards can be divided into two categories according to the heat generation: a first circuit board and a second circuit board, and the heat generation of the first circuit board during operation is higher than that of the second circuit board. In order to improve the heat dissipation efficiency, the first circuit board is arranged at a position closer to the center of the first vent 213 than the position of the second circuit board, that is, the air volume at the position where the first circuit board is located is larger, so that most of the airflow entering the chassis 21 first passes through the first circuit board, thereby improving the overall heat dissipation efficiency.

[0080] For example, the first circuit board includes a transmitting board 23 and an operational amplifier module 25, and the second circuit board includes a baseband board 22 and a receiving board 24. The baseband board 22 is used to generate a sinusoidal signal. The operational amplifier module 25 receives the sinusoidal signal and transmits it to the transmitting board 23 after amplification. The transmitting board 23 receives the amplified sinusoidal signal to drive the transmitting coil in the through-type detection device. The receiving board 24 is used to receive the feedback signal of the receiving coil in the through-type detection device. The transmitting board 23, the operational amplifier module 25, the baseband board 22 and the receiving board 24 are arranged in the first section 211. The operational amplifier module 25 and the transmitting board 23 are stacked up and down, the receiving board 24 is adjacent to and parallel to the transmitting board 23, and the receiving board 24 is spaced apart from the bottom of the chassis 21. The baseband board 22 is arranged above the transmitting board 23 and the receiving board 24, and there is a gap between the baseband board 22 and the transmitting board 23 and the receiving board 24.

[0081] The distances between the operational amplifier module 25 and the transmitting board 23 and the center of the first fan assembly 8 in the horizontal direction are both smaller than the distances between the receiving board 24 and the center of the first fan assembly 8 in the horizontal direction. The distances between the operational amplifier module 25 and the transmitting board 23 and the center of the first fan assembly 8 in the vertical direction are both smaller than the distances between the baseband board 22 and the center of the first fan assembly 8 in the vertical direction.

[0082] Reference Figure 5 and Figure 6 As shown, from the horizontal direction, the stacked operational amplifier module 25 and the transmitting board 23 are closer to the center of the first fan assembly 8, while the receiving board 24 is slightly farther from the center of the first fan assembly 8. From the vertical direction, the operational amplifier module 25 and the transmitting board 23 are closer to the central axis of the first fan assembly 8 relative to the baseband board 22. The baseband board 22 is slightly farther from the central axis of the first fan assembly 8.

[0083] exist Figure 5 In the embodiment, the operational amplifier module 25 is located below the launch board 23. In another embodiment, the operational amplifier module 25 may also be located above the launch board 23. The embodiments of the present utility model are not limited to any specific structural mode.

[0084] Since the operational amplifier module 25 and the launch board 23 have a large amount of heat dissipation, the operational amplifier module 25 and the launch board 23 are elevated so that they are located just above or below the exhaust center of the first fan assembly 8. The air volume here is large, which can accelerate heat dissipation.

[0085] Since the heat dissipation of the receiving board 24 and the baseband board 22 is relatively small, the receiving board 24 and the baseband board 22 are also arranged in the upper and lower areas of the exhaust center of the first fan assembly 8, that is, in the height direction, the baseband board 22 can be arranged close to the central axis of the first fan assembly 8 to ensure the heat dissipation requirements. However, from the horizontal direction, since the heat dissipation of the receiving board 24 is small compared with the heat generated by the operational amplifier module 25 and the transmitting board 23, it can be arranged at a position slightly farther from the first fan assembly 8 relative to the operational amplifier module 25 and the transmitting board 23, so as to meet the overall heat dissipation requirements of these circuit boards and accelerate the heat dissipation.

[0086] In one embodiment, referring to Figure 5 As shown, a slope surface 2111 or an arcuate transition surface (not shown in the figure) is further provided at the position where the first section 211 and the second section 212 are connected. When the airflow drawn from the outside by the first fan assembly 8 into the chassis 21 passes through a plurality of circuit boards, the hot airflow encounters less resistance when passing through the slope surface 2111 or the arcuate transition surface, and can be more smoothly directed to the second fan assembly 9 above to be discharged from the chassis 21.

[0087] When the central controller 10 is working, the first fan assembly 8 draws air into the chassis 21 from the air inlet 61. Under the action of the second fan assembly 9, the airflow further passes through the operational amplifier module 25, the transmitting board 23, the receiving board 24 and the baseband board 22, and is finally discharged from the chassis 21 through the air outlet 41.

[0088] Specifically, refer to Figure 2 As shown, the housing 1 of the central controller 10 includes a frame structure 3, a first skin 4 arranged on the top surface of the frame structure 3, a second skin 5 arranged on the bottom surface of the frame structure 3, a third skin 6 arranged on the first side surface, and a display screen 7 arranged on the second side surface.

[0089] The first skin 4 , the second skin 5 , and the third skin 6 can be made of wood.

[0090] Reference Figure 2 As shown, the air inlet 61 is arranged on the third skin 6 of the first side, and the display screen 7 is arranged on the opposite second side. This separate arrangement leaves enough space for the display screen 7 to meet the needs of electronic information display of the equipment using the central controller 10, while also ensuring that the appearance of the central controller 10 is simple and beautiful.

[0091] Reference Figure 3As shown, the frame structure 3 includes a first frame 31, a second frame 32 and a plurality of connecting rods 33, wherein the first end of the connecting rod 33 is connected to the first frame 31, and the second end of the connecting rod 33 is connected to the second frame 32. The connection between the connecting rod 33 and the first frame 31 (or the second frame 32) may be, for example, screw or bolt connection, welding, clamping, etc., which is not limited in the embodiment of the utility model. The chassis 21 may be fixed to the plurality of connecting rods 33 by screws.

[0092] Based on the same utility model concept, the utility model embodiment also provides a through-type detection device, the structure of which refers to Figure 7 As shown, it includes a first door panel 11, a second door panel 12 and a central controller 10 provided in the above embodiment, and two sides of the central controller 10 are connected to the first door panel 11 and the second door panel 12 respectively.

[0093] When the above-mentioned through-type detection device is working, the circuit board in the central controller 10 controls the transmitting coil to generate a magnetic field. In order to avoid interference between the magnetic field and the circuit board in the central controller 10, the chassis 21 is made of magnetic field shielding material to prevent interference. Specifically, the magnetic field shielding material can be made of sheet metal or iron.

[0094] Obviously, those skilled in the art can make various changes to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications.

Claims

1. A central controller, characterized in that: include: A housing and a host disposed in the housing, wherein the housing comprises a frame structure, and the host is disposed in the frame structure; The host comprises a chassis and a plurality of circuit boards arranged in the chassis; the chassis is hollow and is provided with a first vent and a second vent that penetrate the interior; The housing is provided with an air inlet and an air outlet, the first air outlet is communicated with the air inlet, and the second air outlet is communicated with the air outlet.

2. The central controller according to claim 1, characterized in that: The first vent is opposite to the air inlet, and / or the second vent is opposite to the air outlet.

3. The central controller according to claim 1, characterized in that: The host is arranged along the direction of a first axis; the housing includes a first side surface and a second side surface that are opposite to each other, and a line connecting the center of the first side surface and the center of the second side surface coincides with the first axis.

4. The central controller according to claim 1, characterized in that: The chassis includes a first section and a second section; a first end of the first section is connected to a first end of the second section, and the first section is connected to the second section; The first vent is disposed at the second end of the first section; The second vent is disposed at the second end of the second section; and the height of the second vent is higher than that of the first vent.

5. The central controller according to claim 1, characterized in that: The host also includes: a first fan assembly; The first fan assembly is disposed at the first vent and faces the air inlet of the housing.

6. The central controller according to claim 4, characterized in that: The host also includes: a second fan assembly; The second fan assembly is disposed at a position where the first section and the second section are connected, and faces the air outlet on the outer shell; or, the second fan assembly is disposed at a second vent of the second section, and faces the air outlet on the outer shell.

7. The central controller according to any one of claims 1 to 6, characterized in that: The plurality of circuit boards include: a first circuit board and a second circuit board; the heat generated by the first circuit board during operation is higher than the heat generated by the second circuit board; The first circuit board is disposed at a position closer to the center of the first vent than the second circuit board is disposed.

8. The central controller according to claim 4 or 6, characterized in that: The plurality of circuit boards are located in the first section; and there is a gap between the circuit boards that are adjacently arranged in a direction perpendicular to the bottom of the housing.

9. The central controller according to claim 4 or 6, characterized in that: The host further includes: a first fan assembly; the first fan assembly is arranged at the first vent and faces the air inlet of the housing; the plurality of circuit boards include: a first circuit board and a second circuit board; the first circuit board generates more heat than the second circuit board during operation; the first circuit board is arranged at a position closer to the center of the first vent than the position of the second circuit board; The first circuit board includes: a transmitting board and an operational amplifier module; the second circuit board includes: a baseband board and a receiving board; The transmitting board, the operational amplifier module, the baseband board and the receiving board are arranged in the first section; The operational amplifier module and the transmitting board are stacked up and down; The receiving board is adjacent to and parallel to the transmitting board, and there is a gap between the receiving board and the bottom of the chassis; the baseband board is arranged above the transmitting board and the receiving board, and there is a gap between the baseband board and the transmitting board and the receiving board; The distances between the operational amplifier module and the transmitting board and the center of the first fan assembly in the horizontal direction are both smaller than the distance between the receiving board and the center of the first fan assembly in the horizontal direction; The distances between the operational amplifier module and the transmitting board and the center of the first fan assembly in the vertical direction are both smaller than the distance between the baseband board and the center of the first fan assembly in the vertical direction.

10. The central controller according to claim 4 or 6, characterized in that: A slope surface or an arc-shaped transition surface is also provided at the position where the first section and the second section are connected.

11. A through-type detection device, characterized in that: comprising a first door panel, a second door panel and a central controller as claimed in any one of claims 1 to 10; Two sides of the central controller are connected to the first door panel and the second door panel respectively.

12. The pass-through detection device according to claim 11, characterized in that: The chassis is made of magnetic field shielding material.

Images