Portable terahertz security inspection equipment

Abstract

A portable terahertz security inspection device is disclosed, comprising: a carrier body; a terahertz transmitting device, which is arranged on the carrier body and comprises a terahertz signal source and a transmitting unit connected to the terahertz signal source for transmitting terahertz waves; a terahertz detector, which is arranged on the carrier body and is used to receive terahertz waves reflected by an object to be inspected; a data acquisition and processing system, which is arranged on the carrier body and is connected to the terahertz detector to receive scanning data of the object to be inspected from the terahertz detector and generate a terahertz image; and a display device, which is connected to the data acquisition and processing system and is used to receive and display the terahertz image from the data acquisition and processing system. The portable terahertz security inspection device does not need to be equipped with a mechanical scanning system, so that the volume and weight of the terahertz security inspection device can be greatly reduced, so that the security personnel can manually move the device to complete the scanning of the imaging area.

Description

Technical Field

[0001] The present disclosure relates to the field of security inspection technology, and in particular to a portable terahertz security inspection device. Background Art

[0002] As the international situation becomes increasingly turbulent, traditional security inspection methods have gradually failed to meet the needs, especially in the field of human security inspection. The mode of metal detectors combined with manual searches is currently the most widely used human security inspection method, but this mode often has a high false alarm rate, low efficiency, and is easily detected and evaded by dangerous elements. Terahertz waves are electromagnetic waves with a frequency of 0.1 to 10 THz (wavelength 30 μm to 3 mm). Like millimeter waves and infrared rays on both sides of its spectrum, terahertz waves can discover new technologies in detection and imaging, thereby realizing many important applications in security inspection, medical diagnosis, non-destructive testing, inspection and quarantine, etc. Especially in human security inspection, the photon energy of terahertz waves is much lower than that of X-rays, so it will not cause ionizing radiation damage to the human body, and its wavelength is shorter than that of millimeter waves, so higher resolution imaging effects can be obtained. Terahertz imaging technology has become one of the most promising human security inspection solutions at present, and has attracted widespread attention from many scientific research institutions and security inspection manufacturers at home and abroad.

[0003] Existing terahertz security inspection equipment usually relies on mechanical scanning to obtain a whole human body image output. For example, patent CN204882899 describes an optical path structure of a human body security inspection instrument, the core of which is a drum-type multi-faceted reflective rotating mirror, which cooperates with many electric, mechanical and optical elements to scan and image the human body. Patent CN105044017A describes another fixed terahertz scanning imaging device, which uses two wedge-shaped reflectors to swing and rotate in multiple dimensions to scan the human body. These devices are large in size, heavy in body, complex in structure, and have high energy consumption. Some also require additional cooling and heat dissipation systems. In actual use, these security inspection devices can only be installed in a fixed position in advance, and the security personnel guide the inspected objects to pass through along a specific route in turn. Some devices also require the inspected objects to stand and wait at a specific position so that they can complete the scan, thereby limiting the security inspection rate and increasing the risk of congestion. In addition, these devices can often only obtain human body images under some fixed viewing angles, but are powerless for the more concealed parts such as the armpits, crotch, and soles of the feet, which are most likely to hide contraband. In addition, in order to obtain a terahertz image that can include the entire human body at a smaller scanning angle, it is usually required that the imaging position cannot be too close to the device. This limits the improvement of imaging resolution and also sharply reduces the terahertz waves that the detector can receive, resulting in problems such as blurred images and low detection sensitivity. Summary of the invention

[0004] The purpose of the present disclosure is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0005] According to an embodiment of the present disclosure, a portable terahertz security inspection device is provided, comprising:

[0006] Bearing body;

[0007] A terahertz transmitting device is arranged on the carrier body and comprises a terahertz signal source and a transmitting unit connected to the terahertz signal source for transmitting terahertz waves;

[0008] A terahertz detector, arranged on the carrier body, for receiving the terahertz wave reflected by the detected object;

[0009] a data acquisition and processing system, which is disposed on the carrier and connected to the terahertz detector to receive scanning data of the detected object from the terahertz detector and generate a terahertz image; and

[0010] The display device is connected to the data acquisition and processing system and is used to receive and display the terahertz image from the data acquisition and processing system.

[0011] In some embodiments, the portable terahertz security inspection device further includes a distance sensor disposed on the carrier body, wherein the distance sensor is suitable for sensing the distance between the detected object and the portable terahertz security inspection device, and the distance sensor is connected to the data acquisition and processing system.

[0012] In some embodiments, the data acquisition and processing system includes a data acquisition module for receiving scanning data of the detected object from the terahertz detector, a data processing module for generating a terahertz image for the scanning data, and an image processing module for identifying suspicious objects in the generated terahertz image.

[0013] In some embodiments, the portable terahertz security inspection equipment further includes an alarm device, which is connected to the image processing module so as to sound an alarm when the image processing module identifies a suspicious object in the terahertz image.

[0014] In some embodiments, the portable terahertz security inspection equipment further includes an image acquisition system disposed on the carrier body, and the image acquisition system is connected to the display device.

[0015] In some embodiments, the display device includes a display screen, which includes a first display area suitable for displaying the terahertz image and a second display area suitable for displaying the image acquired by the image acquisition system.

[0016] In some embodiments, a power supply device suitable for supplying power to the portable terahertz security inspection device is also provided on the carrier body.

[0017] In some embodiments, a control switch for controlling the working state of the portable terahertz security inspection device is also provided on the carrier body.

[0018] In some embodiments, the carrier body is a box-type structure, the data acquisition and processing system is located inside the carrier body, the terahertz transmitting device is located on the top wall of the carrier body, and the terahertz detector includes a terahertz lens arranged on the first side wall of the carrier body and a terahertz detection chip connected to the terahertz lens, and the terahertz detection chip is connected to the data acquisition and processing system.

[0019] In some embodiments, the terahertz detector further includes an adjustment flange for adjusting the focal length of the terahertz lens.

[0020] In some embodiments, the display device includes a display base on a second side wall of the carrier body adjacent to a first side wall of the carrier body on which the terahertz lens is installed, the display base is pivotally connected to the carrier body, and the display screen is arranged on a side of the display base close to the carrier body.

[0021] In some embodiments, the portable terahertz security inspection device further includes a handheld portion disposed on a third side wall of the carrying body opposite to the second side wall.

[0022] In some embodiments, the carrier body is a plate-like structure.

[0023] In some embodiments, there are multiple transmitting units, the multiple transmitting units and the terahertz detector are all located on the first side of the carrier body, and the multiple transmitting units are arranged around the terahertz detector.

[0024] In some embodiments, the display device is disposed on a second side of the carrier body opposite to the first side.

[0025] In some embodiments, the portable terahertz security inspection device further includes a handheld portion connected to one end of the carrier body.

[0026] The portable terahertz security inspection equipment described in the various embodiments of the present disclosure does not need to be equipped with a mechanical scanning system, so the volume and weight of the terahertz security inspection equipment can be greatly reduced, so that the security personnel can manually move the equipment to complete the scanning of the imaging area. Since the equipment is easy to move, it can perform local imaging of characteristic areas and any angles, greatly improving the flexibility and practicality of terahertz imaging technology, and the equipment can be used to focus on the parts where contraband may be hidden, thereby improving the accuracy of security inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a working schematic diagram of a portable terahertz imaging security inspection device according to an exemplary embodiment of the present disclosure.

[0028] Figure 2 It is a three-dimensional schematic diagram of a portable terahertz imaging security inspection device according to an exemplary embodiment of the present disclosure.

[0029] Figure 3 yes Figure 2 Another stereoscopic schematic diagram of the portable terahertz imaging security inspection device is shown.

[0030] Figure 4 yes Figure 2 The schematic diagram of the structure of the portable terahertz imaging security inspection equipment is shown.

[0031] Figure 5 It is a three-dimensional schematic diagram of a portable terahertz imaging security inspection device according to another exemplary embodiment of the present disclosure.

[0032] Figure 6 yes Figure 5 Another stereoscopic schematic diagram of the portable terahertz imaging security inspection device is shown.

[0033] Figure 7 yes Figure 5 The schematic diagram of the structure of the portable terahertz imaging security inspection equipment is shown. DETAILED DESCRIPTION

[0034] Although the present disclosure will be fully described with reference to the accompanying drawings containing preferred embodiments of the present disclosure, it should be understood before this description that a person of ordinary skill in the art can modify the disclosure described herein while obtaining the technical effects of the present disclosure. Therefore, it should be understood that the above description is a broad disclosure to a person of ordinary skill in the art, and its content is not intended to limit the exemplary embodiments described in the present disclosure.

[0035] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0036] According to the general inventive concept of the present disclosure, there is provided a portable terahertz security inspection device, comprising: a carrying body; a terahertz transmitting device, which is arranged on the carrying body and comprises a terahertz signal source and a transmitting unit connected to the terahertz signal source for transmitting terahertz waves; a terahertz detector, which is arranged on the carrying body and is used to receive terahertz waves reflected by an object to be inspected; a data acquisition and processing system, which is arranged on the carrying body and is connected to the terahertz detector to receive scanning data of the object to be inspected from the terahertz detector and generate a terahertz image; and a display device, which is connected to the data acquisition and processing system and is used to receive and display the terahertz image from the data acquisition and processing system.

[0037] Example 1

[0038] like Figures 1 to 4 As shown, a portable terahertz security inspection device according to an exemplary embodiment of the present disclosure includes a carrying body 1 in a box-like structure, a terahertz transmitting device 2, a terahertz detector 3, a data acquisition and processing system 4, and a display device 5. The terahertz transmitting device 2 is arranged on the top wall of the carrying body 1, and includes a terahertz signal source 21 and a horn antenna 22 connected to the terahertz signal source 21, which is used to send terahertz waves and shape the emitted terahertz waves. The horn antenna 22 is emitted in a direction forward and downward, and forms a specific angle with the horizontal direction, so that at the working distance, the emitted terahertz waves can be irradiated on the object to be inspected, and the primary reflection energy of the reflected signal can be received by the terahertz detector 3. The terahertz detector 3 includes a terahertz lens 31 arranged on the first side wall of the box-like structure and a terahertz detection chip 32 connected to the terahertz lens 31. The data acquisition and processing system 4 is located inside the carrying body 1, and is connected to the terahertz detection chip 32 to receive the scanning data of the object to be inspected from the terahertz detector 3 and generate a terahertz image. The display device 5 is connected to the data acquisition and processing system 4 and is used for receiving and displaying the terahertz image from the data acquisition and processing system 4 .

[0039] The portable terahertz security inspection equipment provided by the present disclosure does not need to be equipped with an internal scanning device, but relies on the security personnel to manually move the carrier body 1 to complete the scanning of the imaging area. This method can greatly reduce the volume and weight of the terahertz security inspection equipment, reduce the equipment production cost, reduce energy consumption, and save space. More importantly, due to the convenience of mobility, the device can perform local imaging of characteristic areas and any angles, greatly improving the flexibility and practicality of terahertz imaging technology, and perfectly solving the problem of insufficient local resolution of terahertz images. In addition, the device can be used to focus on the areas where contraband may be hidden, thereby improving the accuracy of security inspections.

[0040] like Figure 2 and Figure 4 As shown, in an exemplary embodiment, the portable millimeter wave security inspection device further includes a distance sensor 7 disposed on the carrier body 1, the distance sensor being suitable for sensing the distance between the detected object and the portable terahertz security inspection device, and the distance sensor 7 is connected to the data acquisition and processing system 4 and transmits the detected electrical signal to the data acquisition and processing system 4. Here, the distance sensor 7 includes but is not limited to infrared, ultrasonic and microwave distance sensors.

[0041] like Figure 1 and Figure 4 As shown, in an exemplary embodiment, the data acquisition and processing system 4 includes a data acquisition module 41 and a data processing module 42. The data acquisition module 41 receives the electrical signals transmitted from the terahertz detection chip 10 and the distance sensor 7, and converts them into digital signals and transmits them to the data processing module 42. The data processing module 42 is the calculation and control center of the entire portable terahertz security inspection device, which is mainly used to pre-process the signals collected by the terahertz detection chip 10, and calculate the distance between the device and the object to be measured according to the signals collected by the distance sensor 7, and compensate and optimize the pre-processed signals in combination with the imaging distance, and convert the optimized signals into image information and transmit them to the display device 5 for output.

[0042] like Figure 1 As shown, in an exemplary embodiment, the data acquisition and processing system 4 also includes an image processing module 43 connected to the data processing module 42 and an alarm device 11 connected to the image processing module 43. The image processing module 43 is suitable for judging the generated terahertz image against an internal database, and issuing an alarm when it is judged that there are suspicious objects in the generated terahertz image. For example, an intuitive judgment result can be given on the display device 5 by using text display, image annotation, etc.

[0043] like Figure 2 and Figure 4As shown, in an exemplary embodiment, the portable millimeter wave security inspection device also includes an image acquisition system 8 arranged on the carrier body 1, and the image acquisition system 8 is connected to the display device 5. The image acquisition system 8 can realize real-time imaging of visible light and provide image information of the inspected object for comparison with the terahertz image for user reference.

[0044] In an exemplary embodiment not shown, the display device 5 includes a display screen 52, which includes a first display area suitable for displaying a terahertz image and a second display area suitable for displaying an image captured by the image acquisition system 8, so that the user can compare the image captured by the image acquisition system with the terahertz image.

[0045] like Figure 2 and Figure 4 As shown, in an exemplary embodiment, the portable millimeter wave security inspection device further includes an adjustment flange 33 for adjusting the focal length of the terahertz lens 31, so as to adjust the imaging distance by adjusting the flange 33, realize manual or automatic focusing function, and enhance the collection efficiency of the terahertz wave to be measured. The adjustment flange 33 can be automatically calibrated by manually adjusting the terahertz lens 31, or by using the distance parameter measured by the distance sensor 7.

[0046] In some embodiments not shown in the present disclosure, the portable millimeter wave security inspection device may also have an anti-shake processing function to avoid image blurring, distortion and other problems caused by the shaking of the user's hands. In addition, in some embodiments not shown in the present disclosure, the portable millimeter wave security inspection device may also have a motion compensation function to reduce the image quality degradation caused by the movement of the detected object. Both of the above functions can be achieved through appropriate data processing algorithms combined with real-time distance sensing information.

[0047] like Figure 2 and Figure 4 As shown, in an exemplary embodiment, the display device 5 includes a display base 51 on a second side wall adjacent to a first side wall of the carrier body 1 on which the terahertz lens 31 is installed, the display base 51 is pivotally connected to the carrier body 1, and a display screen 52 is arranged on a side of the display base 51 close to the carrier body 1. In this way, when the portable millimeter wave security inspection device is not in operation, the display device 5 can be placed against the carrier body 1, and when in operation, the display device can be pivoted to a suitable position for the user to view.

[0048] It should be noted that those skilled in the art should understand that in some other embodiments of the present disclosure, the display device 5 may not be provided. In this case, the terahertz image and the image captured by the image acquisition system 8 can be transmitted to an external display device for output via a wired network or wireless transmission.

[0049] like Figure 2 and Figure 4 As shown, in an exemplary embodiment, the portable millimeter wave security inspection device further includes a handheld portion 6 disposed on a third side wall of the carrier body 1 opposite to the second side wall. It should be noted that those skilled in the art should understand that in some other embodiments of the present disclosure, the handheld portion 6 may also be disposed at other positions, or may be connected by a soft connection, so that the angle, position, and tightness of the handheld portion 6 may be arbitrarily adjusted to facilitate the use of the user.

[0050] like Figure 2 and Figure 4 As shown, in an exemplary embodiment, a power supply device 9 suitable for supplying power to the portable terahertz security inspection device is also provided on the carrier body 1. The power supply device 9 is usually composed of a rechargeable battery, so as to be used outdoors or in special circumstances, so that the portable millimeter wave security inspection device has good adaptability to special environments such as forests and deserts.

[0051] like Figure 4 As shown, in an exemplary embodiment, a control switch 10 for controlling the working state of the portable terahertz security inspection device is also provided on the carrier body 1. The control switch 10 is used to realize external control of the terahertz transmitting device 2, the terahertz detection chip 33, the display device 5, etc., and can also be used to adjust image effects, switch device working modes, etc. When necessary, the terahertz transmitting device 2 and the terahertz detection chip 33 are turned off through internal signals to prevent the device from being damaged by abnormal factors, etc.

[0052] Example 2

[0053] This embodiment is basically the same as Embodiment 1. For the sake of brevity, in the description of this embodiment, the same technical features as those of Embodiment 1 are not described again, and only the differences between this embodiment and Embodiment 1 are described:

[0054] In this embodiment, if Figures 5 to 7 As shown, the carrier body 1 is a plate-like structure. There are multiple transmitting units 2 to enhance the brightness of the terahertz image and expand the imaging area; the multiple transmitting units 2 and the terahertz detector 3 are all located on the first side of the carrier body 1, and the multiple transmitting units 2 are arranged around the terahertz detector 3. The display device 5 is arranged on the second side of the carrier body 1 opposite to the first side. In this embodiment, since the terahertz lens 31 is omitted, it is convenient for the user to perform close-up detection of the object to be detected.

[0055] like Figures 5 to 7 As shown, the handheld portion of the portable millimeter wave security inspection device is arranged at one end of the carrying body 1 to facilitate the user to hold it in hand.

[0056] like Figures 5 to 7 As shown, the alarm device 11 of the portable millimeter wave security inspection equipment is a buzzer, which emits a sound alarm when it is determined that there are suspicious objects in the generated terahertz image.

[0057] When using the portable terahertz security inspection device, the user directs the device toward the inspected person or object, and scans and moves in a specific scanning mode until the scanning area can completely cover the area to be inspected. During the entire scanning process, the terahertz wave is generated by the terahertz signal source and shaped by the transmitting unit, and finally irradiates the inspected object with a specific irradiation angle and spot shape. When the terahertz wave irradiates the inspected object, it will be reflected, and the reflected terahertz wave will be received by the terahertz detector. The terahertz detector converts the received terahertz wave into an electrical signal and transmits it to the data acquisition and processing system. After receiving the signal from the terahertz detector, the data acquisition and processing module will analyze and calculate the signal, and finally convert the signal into image information output for the user to observe and judge the inspection results. The operator can turn off the portable device in time by controlling the switch when finishing use, thereby reducing energy loss and extending the life of the equipment.

[0058] It should be noted that, here, the terahertz signal source 21 includes but is not limited to an avalanche diode terahertz source (IMPPTT), a terahertz quantum cascade laser (QCL), a terahertz frequency doubling transmission link, etc. The number of terahertz signal sources 21 is not limited, and can be one or more. In addition, the spectrum components of the terahertz signal source 21 are not limited, and can be a wide-spectrum terahertz light source, or can include a single frequency source, or a combination of multiple different terahertz emission sources. The transmitting unit 22 is usually arranged in conjunction with the terahertz signal source 21, including but not limited to a horn antenna, a shaping lens, a reflector, etc.

[0059] The terahertz detector 3 is used to receive the terahertz waves reflected from the detected object and convert them into electrical signals to transmit to the data acquisition and processing system 4. It should be noted that the types and working principles of the terahertz detectors are not limited, including but not limited to terahertz focal plane radiation thermal detectors, terahertz pyroelectric detectors, heterodyne terahertz receiving links, etc. The arrangement of the detection units of the terahertz detector 3 includes but is not limited to a plane array, a linear array or other arrangements, such as a ring arrangement, a square arrangement, etc. The detection units of the terahertz wave detector include but are not limited to an imaging lens, a converging lens, a collecting antenna, etc.

[0060] According to the above-mentioned various embodiments of the portable terahertz security inspection equipment of the present disclosure, there is no need to be equipped with a mechanical scanning system, so that the volume and weight of the terahertz security inspection equipment can be greatly reduced, so that the security inspector can manually move the bearing body to complete the scanning of the imaging area. Since the portable terahertz security inspection equipment is easy to move, it can perform local imaging of characteristic areas and any angles, greatly improving the flexibility and practicality of terahertz imaging technology. In addition, the portable device can be used to focus on the parts where contraband may be hidden, thereby improving the accuracy of security inspection. The portable terahertz security inspection equipment can be used not only for human security inspection, but also for object detection. The portable device is applicable to items including but not limited to luggage, mail parcels, paper boxes and letters, etc., and can be widely used in various scenarios such as drug detection, smuggling inspection, inspection and quarantine. Especially in summer or some areas with hot climates, the clothes of the person being detected are usually less. In this case, it is generally not necessary to scan and image the entire human body, and the portable terahertz security inspection equipment can be used to quickly check the parts where contraband may be hidden, thereby improving the efficiency of security inspection. This portable terahertz security inspection equipment can also be used in situations where security requirements are relatively relaxed or in other similar situations.

[0061] Those skilled in the art can understand that the embodiments described above are exemplary and can be improved by those skilled in the art. The structures described in various embodiments can be freely combined without causing conflicts in structure or principle.

[0062] After describing the preferred embodiments of the present disclosure in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the appended claims, and the present disclosure is not limited to the implementation methods of the exemplary embodiments listed in the specification.

Claims

1. A portable terahertz security inspection device, comprising: Bearing body; A terahertz transmitting device is arranged on the carrier body and comprises a terahertz signal source and a transmitting unit connected to the terahertz signal source for transmitting terahertz waves; A terahertz detector, arranged on the carrier body, for receiving terahertz waves reflected by the detected object, the terahertz detector comprising a terahertz lens, a terahertz detection chip connected to the terahertz lens, and an adjustment flange for adjusting the focal length of the terahertz lens; A data acquisition and processing system, which is arranged on the carrier body and connected to the terahertz detector to receive scanning data of the detected object from the terahertz detector and generate a terahertz image; A display device, connected to the data acquisition and processing system, for receiving and displaying the terahertz image from the data acquisition and processing system; as well as A distance sensor is arranged on the carrying body, the distance sensor is suitable for sensing the distance between the detected object and the portable terahertz security inspection device, and the distance sensor is connected to the data acquisition and processing system. Wherein, the pre-processed signal obtained by the terahertz detection chip is compensated and optimized based on the distance measured by the distance sensor, and the terahertz lens is automatically calibrated based on the distance measured by the distance sensor through the adjustment flange; Among them, the carrying body is a box-type structure, the terahertz lens is arranged on the first side wall of the carrying body, the display device is arranged on the second side wall of the carrying body adjacent to the first side wall, and the portable terahertz security inspection equipment also includes a handheld part arranged on the third side wall of the carrying body opposite to the second side wall.

2. The portable terahertz security inspection device according to claim 1, wherein: The data acquisition and processing system includes a data acquisition module for receiving scanning data of the detected object from the terahertz detector, a data processing module for generating a terahertz image for the scanning data, and an image processing module for identifying suspicious objects in the generated terahertz image.

3. The portable terahertz security inspection device according to claim 2, wherein: It also includes an alarm device, which is connected to the image processing module so that an alarm is issued when the image processing module identifies a suspicious object in the terahertz image.

4. The portable terahertz security inspection device according to claim 1, wherein: It also includes an image acquisition system arranged on the bearing body, and the image acquisition system is connected to the display device.

5. The portable terahertz security inspection device according to claim 4, wherein: The display device comprises a display screen, wherein the display screen comprises a first display area suitable for displaying the terahertz image and a second display area suitable for displaying the image acquired by the image acquisition system.

6. The portable terahertz security inspection device according to claim 1, wherein: The bearing body is also provided with a power supply device suitable for supplying power to the portable terahertz security inspection equipment.

7. The portable terahertz security inspection device according to claim 1, wherein: The carrying body is also provided with a control switch for controlling the working state of the portable terahertz security inspection device.

8. The portable terahertz security inspection device according to any one of claims 1 to 7, wherein: The carrier body is a box-type structure, the data acquisition and processing system is located inside the carrier body, the terahertz emission device is located on the top wall of the carrier body, and the terahertz detection chip is connected to the data acquisition and processing system.

9. The portable terahertz security inspection device according to claim 8, wherein: The display device comprises a display base on a second side wall of the carrier body adjacent to a first side wall of the carrier body on which the terahertz lens is installed, the display base is pivotally connected to the carrier body, and the display screen is arranged on a side of the display base close to the carrier body.

10. The portable terahertz security inspection device according to claim 9, wherein: The invention also includes a handle portion which is arranged on a third side wall of the carrying body opposite to the second side wall.

11. The portable terahertz security inspection device according to any one of claims 1 to 7, wherein: The bearing body is a plate-shaped structure.

12. The portable terahertz security inspection device according to claim 11, wherein: There are multiple transmitting units, and the multiple transmitting units and the terahertz detector are all located on the first side of the carrier body, and the multiple transmitting units are arranged around the terahertz detector.

13. The portable terahertz security inspection device according to claim 11, wherein: The invention also comprises a hand-held part connected to one end of the carrying body.

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