WO2016197278A1 - Active terahertz human body security system device and adjustment method - Google Patents
Active terahertz human body security system device and adjustment method Download PDFInfo
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- WO2016197278A1 WO2016197278A1 PCT/CN2015/000578 CN2015000578W WO2016197278A1 WO 2016197278 A1 WO2016197278 A1 WO 2016197278A1 CN 2015000578 W CN2015000578 W CN 2015000578W WO 2016197278 A1 WO2016197278 A1 WO 2016197278A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
Definitions
- the invention relates to an electromagnetic wave imaging technology, in particular to an active terahertz human body security system device and an adjustment method.
- terahertz imaging does not achieve imaging of devices such as visible or infrared CCD cameras, so most terahertz imaging uses a multi-probe imaging mode. This imaging mode is costly, thus limiting its wide application in security inspections and the like. Based on the current demand for low cost, high resolution, large viewing angle, and fast imaging, the present invention designs an active terahertz human body security system device and an adjustment method.
- the invention is directed to the problem of the current terahertz imaging device lacking low cost, high resolution, large viewing angle and fast imaging speed, and proposes an active terahertz human body security system device and an adjustment method using a terahertz source and a terahertz
- the transmission waveguide uniformly illuminates the target person, and adopts a terahertz plane mirror, a terahertz focusing mirror, a terahertz detector and an image analysis processing module, and controls the oscillating axis and the angle adjustment axis of the terahertz plane mirror, thereby realizing Fast scan imaging of the target person.
- an active terahertz human body security system device including a target person, a terahertz plane mirror, a terahertz focusing mirror, a terahertz detector, an image analysis processing module, a jet loading device Position, target automatic sensing device, baffle, device housing, background plate, terahertz source high-speed galvanometer and terahertz transmission waveguide, terahertz detector is located at the focus of the terahertz focusing mirror, the jet device is located above the target person, the target person There is a target automatic sensing device next to it.
- the background plate is located on the back of the target person.
- the baffle is located between the target person and the detecting device.
- the baffle can transmit terahertz to block visible light.
- the terahertz transmission waveguide has multiple output ports behind the baffle.
- the terahertz source passes through the high-speed galvanometer and then passes through the terahertz transmission waveguide to uniformly illuminate the target person from different angles.
- the terahertz plane mirror swings horizontally from side to side or vertically up and down to single-row the target person. Or a single-column scan, the terahertz wave reflected by the target person is collected and reflected to the terahertz focusing mirror, and is focused by the terahertz focusing mirror to enter the terahertz detector.
- the terahertz detector inputs the signal into the image analysis processing module to obtain a clear and intuitive human body. Image, all parts are placed inside the enclosure housing.
- the terahertz planar mirror is a plane mirror whose surface is made of a metal material and can realize high reflection of terahertz waves.
- the terahertz focusing mirror is a parabolic mirror or an ellipsoidal mirror whose surface is made of a metal material and can simultaneously achieve terahertz wave reflection and terahertz wave focusing.
- the baffle is selected to transmit a Teflon or polyethylene material that blocks terahertz from visible light.
- the background plate is made of a material that can absorb terahertz waves, and is used to reduce background noise during terahertz human body security inspection.
- the method for adjusting the active terahertz human body security system device when the target person stands at the designated position, when the target automatic sensing device senses the object to be tested, the jet device sprays dry cold air to the target person, and blows away the target The dust and moisture around the character, and the temperature of the surface of the target person is lowered, and the signal-to-noise ratio of the target detected by the sensor is increased.
- the terahertz wave radiated by the terahertz source is diffusely reflected in the terahertz transmission waveguide, and the The output port uniformly illuminates the target person 1, and the terahertz plane mirror swings horizontally to the left or right or vertically up and down to scan the target person in a single row or a single column, and the terahertz wave collection of the diffuse reflection of the human body is respectively reflected on the terahertz focusing mirror.
- the terahertz detector is input, and the terahertz detector inputs the signal into the image analysis processing module to obtain a clear and intuitive human body image.
- the invention has the beneficial effects that the invention is an active terahertz human body security system device and an adjustment method, and the device is simple and easy to operate.
- the invention is an active terahertz human body security system device and an adjustment method, and the device is simple and easy to operate.
- the illumination of the terahertz source by applying the illumination of the terahertz source, the signal intensity collected in the later stage is enhanced, and the recognition rate of the image is improved.
- the axis of the plane mirror and the angle adjustment axis enable high-resolution, fast scanning imaging of the target person; the device is suitable for microwave, terahertz, and infrared waves.
- FIG. 1 is a schematic structural view of an active terahertz human body security inspection system device according to the present invention.
- Figure 1 is a schematic diagram showing the structure of the active terahertz human body security system device, by target person 1, terahertz plane mirror 2, terahertz focusing mirror 3, terahertz detector 4, image analysis processing module 5, jet device 6, Target automatic sensing device 7 (uvwx-lqtk), baffle 8 (pmqt-onrs), device housing 9 (abcd-efgh), background board 10 (daeh-jilk), terahertz source 11, high speed galvanometer 12 and terahertz
- the transmission waveguide 13 (including four ports A, B, C, and D) is composed.
- the jet device 6 sprays dry cold air to the target person 1, blows off the dust and moisture attached to the target person 1, and lowers the temperature of the target person's surface, making the sensor easier to detect, thereby increasing the contrast, thereby obtaining A clearer picture of the human body.
- the purpose of the target automatic sensing device 7 is that when the target person 1 is located at the designated position, the target automatic sensing device senses that the other devices are in the ready working state.
- the baffle 8 can be selected from Teflon, polyethylene, etc., which transmits terahertz to block visible light, and is used to isolate the target person 1 from the rear detecting device.
- the device casing 9 may be made of a metal material having a certain hardness such as stainless steel or alloy for protecting the entire system.
- the background plate 10 is a material that absorbs terahertz waves and is used to reduce background noise during terahertz human body security.
- the terahertz source 11 is first passed through the high speed galvanometer 12 and then output through the terahertz transmission waveguide 13 for eliminating the coherence of the terahertz wave, thereby facilitating the obtaining of the polarization terahertz waves.
- the terahertz transmission waveguide 13 is a pipe for diffusing reflection of the terahertz wave radiated from the terahertz source, and is divided into four ports (or more ports, which can adjust the number and position of the port according to actual needs) from different angles. The target person is evenly illuminated.
- the terahertz plane mirror 2 swings horizontally left and right to perform a single line scan on the target person 1 (or a vertical scan of the target person 1 by vertical up and down swing), and collects and reflects the terahertz wave reflected by the target person 1 to the terahertz focusing mirror 3, After being focused by the terahertz focusing mirror 3, it enters the terahertz detector 4, and finally the signal is input to the image analysis processing module 5 to obtain a clear and intuitive human body image.
- the target person takes an adult as an example.
- the terahertz plane mirror is a silver-plated plane mirror.
- the terahertz focusing mirror uses a parabolic silver mirror as an example.
- the terahertz source has a center frequency of 94G.
- the terahertz source is taken as an example.
- the terahertz transmission waveguide is exemplified by the material aluminum.
- the microwave and infrared waves in other bands are the same as the above-mentioned implementation method, and only all the devices need to be replaced with the corresponding devices for the corresponding band.
- the height of the scanning target plate is set to 2 meters and the width is 1 meter according to the size of a normal adult (the volume is about 180 cm * 60 cm * 30 cm).
- the specific adjustment process is as follows: when the person stands at the designated position, the target automatic sensing device 7 senses that the other devices are in the ready-to-work state, and then the upper jet device 6 ejects dry cold air and blows away the target person 1 around. Dust and moisture make the temperature of the target person's surface drop a little, making the sensor easier to detect, and it is easy to increase the contrast, resulting in a clearer image of the human body.
- the terahertz wave radiated by the terahertz source 11 is diffusely reflected in the terahertz transmission waveguide 13, and the target person 1 is uniformly irradiated through the four ports A, B, C, and D behind the baffle, and the terahertz wave is targeted.
- the body surface After the body surface is reflected out, it reaches the plane mirror 2 (the silver film plane mirror with a diameter of 40cm), and the plane mirror 2 swings horizontally to the left and right for a single line scan.
- the single line scan width is 1 meter (or the vertical up and down swing to the target person 1 Simultaneously, a single column scan is performed, and the width of the single column scan is 2 meters.
- the plane mirror 2 is rotated again to continue the scanning of the next row or the next column until the area of the entire target plate is scanned.
- the terahertz waves in different directions of the diffuse reflection of the human body are continuously collected and reflected to the terahertz focusing mirror 3 (parabolic silver mirror with a focal length of 50 cm), and then focused into the terahertz detector 4, and finally the signal is input to the image analysis processing module 5 Get a clear and intuitive image of the human body. Since terahertz waves can pass through the fabric, and metal products such as knives can block the propagation of terahertz waves, the human body image obtained by scanning can directly determine whether the person carries dangerous goods.
- the human body can diffusely reflect the light waves of the microwave, terahertz wave, and infrared waves, when the light source of these bands is applied to the human body, the light of these bands can pass through the clothes and can be diffused and reflected by the human body, but it is replaced by a metal knife or gasoline. Dangerous goods block their spread, so they can eventually be distinguished from the human body by imaging. Therefore, the device is applicable to microwaves, terahertz waves, and infrared waves.
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Abstract
An active terahertz human body security system device and adjustment method, comprising a target person (1), a terahertz plane mirror (3), a terahertz focusing mirror (2), a terahertz detector (4), an image analysis processing module (5), a jetting device (6), a target auto-sensing device (7), a shield panel (8), a device housing (9), a back panel (10), a terahertz source (11), a high speed galvanometer (12) and a terahertz transmission waveguide (13). A terahertz wave radiated from the terahertz source (11) undergoes terahertz decoherence via the high speed galvanometer (12), enters the terahertz transmission waveguide (13) and is divided among a plurality of ports, whereby the target person (1) is uniformly irradiated from different angles. A body surface of the target person (1) reflects the terahertz wave uniformly radiated thereupon, and an oscillation axis and an angle adjustment axis of the terahertz plane mirror (3) are controlled to realize fast scanning and imaging of the target person (1). An oscillation angle and a rotation angle are set according to actual experimental conditions. The device is simple and easy to operate, and the method is applicable to microwaves, terahertz waves and far-infrared waves.
Description
本发明涉及一种电磁波成像技术，特别涉及一种主动式太赫兹人体安检***装置及调整方法。The invention relates to an electromagnetic wave imaging technology, in particular to an active terahertz human body security system device and an adjustment method.
太赫兹波是频率在0.1到10THz(1THz＝1013Hz)范围的电磁波。太赫兹波同其相邻两侧的红外和微波一样，在探测和光斑成像等方面能够发掘全新的技术，从而实现在材料、微电子、医学诊断、大气与环境监测、生物检测和通讯等诸多方面的应用。太赫兹科学和技术已经成为21世纪最有前途的研究方向之一。且1THz的光子能量仅为4.1meV，与X射线相比，太赫兹波不会造成活体组织细胞的损伤，因此太赫兹波可适用于机场等地的安全检查。The terahertz wave is an electromagnetic wave having a frequency in the range of 0.1 to 10 THz (1 THz = 10 13 Hz). Like the infrared and microwave on its adjacent sides, terahertz waves can discover new technologies in detection and spot imaging, enabling materials, microelectronics, medical diagnostics, atmospheric and environmental monitoring, biometrics and communications. Aspect of the application. Terahertz science and technology has become one of the most promising research directions in the 21st century. And the photon energy of 1THz is only 4.1meV. Compared with X-rays, terahertz waves do not cause damage to living tissue cells, so terahertz waves can be used for security inspections in airports and other places.
目前，机场等地的重要进出口多数采用X光机对旅客的行李进行检查，以及配合使用手持式金属探测器对旅客进行安全检查。这种安检方法需要安检人员手持金属探测器在旅客身上滑扫，费时费力，且X光机对人体具有一定的危险性。而太赫兹波具有穿透能力强、光子能量低等优点，因此太赫兹实时成像扫描技术在安全检查方面有着巨大的应用前景。At present, most of the important import and export of airports and other places use X-ray machines to check passengers' baggage, and use hand-held metal detectors to conduct passengers' safety inspections. This kind of security inspection method requires the security personnel to slide the metal detector on the passenger, which is time-consuming and laborious, and the X-ray machine has certain danger to the human body. While terahertz waves have the advantages of strong penetrating power and low photon energy, terahertz real-time imaging scanning technology has great application prospects in security inspection.
总的来说，受加工工艺的限制，太赫兹成像还达不到可见光或红外波段CCD相机之类设备的成像效果，因此大多数太赫兹成像是采用多探头成像模式。这种成像模式成本高昂，因而限制了其在安检等方面的广泛应用。基于目前这种低成本、高分辨率、大视角、快速成像的需求，本发明设计了一种主动式太赫兹人体安检***装置及调整方法。In general, due to processing limitations, terahertz imaging does not achieve imaging of devices such as visible or infrared CCD cameras, so most terahertz imaging uses a multi-probe imaging mode. This imaging mode is costly, thus limiting its wide application in security inspections and the like. Based on the current demand for low cost, high resolution, large viewing angle, and fast imaging, the present invention designs an active terahertz human body security system device and an adjustment method.
发明内容Summary of the invention
本发明是针对目前缺少低成本、高分辨率、大视角、成像速度快的太赫兹成像装置的问题，提出了一种主动式太赫兹人体安检***装置及调整方法，采用太赫兹源和太赫兹传输波导对目标人物进行均匀照射，并采用太赫兹平面反射镜，太赫兹聚焦镜，太赫兹探测器和图像分析处理模块，通过控制太赫兹平面反射镜的摆动轴和角度调节轴，从而实现对目标人物的快速扫描成像。The invention is directed to the problem of the current terahertz imaging device lacking low cost, high resolution, large viewing angle and fast imaging speed, and proposes an active terahertz human body security system device and an adjustment method using a terahertz source and a terahertz The transmission waveguide uniformly illuminates the target person, and adopts a terahertz plane mirror, a terahertz focusing mirror, a terahertz detector and an image analysis processing module, and controls the oscillating axis and the angle adjustment axis of the terahertz plane mirror, thereby realizing Fast scan imaging of the target person.
本发明的技术方案为：一种主动式太赫兹人体安检***装置，包括目标人物，太赫兹平面反射镜，太赫兹聚焦镜，太赫兹探测器，图像分析处理模块，喷气装
置，目标自动感应装置，挡板，装置外壳，背景板，太赫兹源高速振镜以及太赫兹传输波导，太赫兹探测器位于太赫兹聚焦镜焦点处，喷气装置位于目标人物的上面，目标人物的旁边有目标自动感应装置，背景板位于目标人物的后背，挡板位于目标人物与探测装置之间，挡板可透射太赫兹阻挡可见光，太赫兹传输波导多个输出端口位于挡板后面的四个角上，太赫兹源先通过高速振镜，再通过太赫兹传输波导输出，从不同角度对目标人物进行均匀照射，太赫兹平面反射镜水平左右摆动或竖直上下摆动对目标人物进行单行或单列扫描，将目标人物反射出的太赫兹波收集反射至太赫兹聚焦镜，经太赫兹聚焦镜聚焦后进入太赫兹探测器，太赫兹探测器将信号输入图像分析处理模块得到清晰直观的人体图像，所有部件置于封闭装置外壳内。The technical solution of the invention is: an active terahertz human body security system device, including a target person, a terahertz plane mirror, a terahertz focusing mirror, a terahertz detector, an image analysis processing module, a jet loading device
Position, target automatic sensing device, baffle, device housing, background plate, terahertz source high-speed galvanometer and terahertz transmission waveguide, terahertz detector is located at the focus of the terahertz focusing mirror, the jet device is located above the target person, the target person There is a target automatic sensing device next to it. The background plate is located on the back of the target person. The baffle is located between the target person and the detecting device. The baffle can transmit terahertz to block visible light. The terahertz transmission waveguide has multiple output ports behind the baffle. At the four corners, the terahertz source passes through the high-speed galvanometer and then passes through the terahertz transmission waveguide to uniformly illuminate the target person from different angles. The terahertz plane mirror swings horizontally from side to side or vertically up and down to single-row the target person. Or a single-column scan, the terahertz wave reflected by the target person is collected and reflected to the terahertz focusing mirror, and is focused by the terahertz focusing mirror to enter the terahertz detector. The terahertz detector inputs the signal into the image analysis processing module to obtain a clear and intuitive human body. Image, all parts are placed inside the enclosure housing.
所述太赫兹平面反射镜，是表面为金属材料的可实现太赫兹波高反射的平面镜。The terahertz planar mirror is a plane mirror whose surface is made of a metal material and can realize high reflection of terahertz waves.
所述太赫兹聚焦镜，是表面为金属材料的可同时实现太赫兹波高反射和太赫兹波聚焦的抛物面镜或者椭球镜。The terahertz focusing mirror is a parabolic mirror or an ellipsoidal mirror whose surface is made of a metal material and can simultaneously achieve terahertz wave reflection and terahertz wave focusing.
所述挡板选可以透射太赫兹阻挡可见光的特氟龙或聚乙烯材料。The baffle is selected to transmit a Teflon or polyethylene material that blocks terahertz from visible light.
所述背景板选用可吸收太赫兹波的材料，用于减小太赫兹人体安检时的背景噪声。The background plate is made of a material that can absorb terahertz waves, and is used to reduce background noise during terahertz human body security inspection.
所述主动式太赫兹人体安检***装置的调整方法，目标人物站到指定位置时，目标自动感应装置感应到有待测物体时，喷气装置向目标人物喷出干燥冷空气，吹走附着在目标人物周围的灰尘及水汽，且让目标人物表面的温度下降，提高传感器检测目标物的信噪比，太赫兹源辐射出的太赫兹波在太赫兹传输波导内漫反射，通过挡板后的多个输出端口对目标人物1进行均匀照射，太赫兹平面反射镜水平左右摆动或竖直上下摆动对目标人物进行单行或单列扫描，将人体漫反射的太赫兹波收集分别反射至太赫兹聚焦镜上，聚焦后进入太赫兹探测器，太赫兹探测器将信号输入图像分析处理模块得到清晰直观的人体图像。The method for adjusting the active terahertz human body security system device, when the target person stands at the designated position, when the target automatic sensing device senses the object to be tested, the jet device sprays dry cold air to the target person, and blows away the target The dust and moisture around the character, and the temperature of the surface of the target person is lowered, and the signal-to-noise ratio of the target detected by the sensor is increased. The terahertz wave radiated by the terahertz source is diffusely reflected in the terahertz transmission waveguide, and the The output port uniformly illuminates the target person 1, and the terahertz plane mirror swings horizontally to the left or right or vertically up and down to scan the target person in a single row or a single column, and the terahertz wave collection of the diffuse reflection of the human body is respectively reflected on the terahertz focusing mirror. After focusing, the terahertz detector is input, and the terahertz detector inputs the signal into the image analysis processing module to obtain a clear and intuitive human body image.
本发明的有益效果在于：本发明是一种主动式太赫兹人体安检***装置及调整方法，装置简单，容易操作。在实际操作过程中，通过外加太赫兹光源的照射，增强后期收集的信号强度，提高图像的识别率。另外，操作中只需要依据实际实验情况设定好太赫兹平面反射镜的摆动角度以及每次的旋转角度，通过控制太赫
兹平面反射镜的摆动轴和角度调节轴，从而实现对目标人物的高分辨率、快速扫描成像；该装置对于微波，太赫兹波，红外波均适用。The invention has the beneficial effects that the invention is an active terahertz human body security system device and an adjustment method, and the device is simple and easy to operate. In the actual operation process, by applying the illumination of the terahertz source, the signal intensity collected in the later stage is enhanced, and the recognition rate of the image is improved. In addition, in operation, it is only necessary to set the swing angle of the terahertz plane mirror and the angle of each rotation according to the actual experimental conditions, by controlling the terahertz
The axis of the plane mirror and the angle adjustment axis enable high-resolution, fast scanning imaging of the target person; the device is suitable for microwave, terahertz, and infrared waves.
图1为本发明主动式太赫兹人体安检***装置结构示意图。1 is a schematic structural view of an active terahertz human body security inspection system device according to the present invention.
如图1所示主动式太赫兹人体安检***装置结构示意图，由目标人物1，太赫兹平面反射镜2，太赫兹聚焦镜3，太赫兹探测器4，图像分析处理模块5，喷气装置6，目标自动感应装置7(uvwx-lqtk)，挡板8(pmqt-onrs)，装置外壳9(abcd-efgh)，背景板10(daeh-jilk)，太赫兹源11，高速振镜12以及太赫兹传输波导13(包含A、B、C、D四个端口)组成。其中，喷气装置6向目标人物1喷出干燥冷空气，吹走附着在目标人物1周围的灰尘及水汽，让目标人物表面的温度下降一点，让传感器更容易检测到，便于增加对比度，从而得到更加清晰的人体图像。目标自动感应装置7的用途是当目标人物1位于指定位置时，目标自动感应装置感应后使其他设备均处于准备工作状态。挡板8可选特氟龙、聚乙烯等透射太赫兹阻挡可见光的材料，用于隔离目标人物1与后面的探测装置。装置外壳9可选不锈钢或合金等具有一定硬度的金属材料，用于保护整个***。背景板10，是一种吸收太赫兹波的材料，用于减小太赫兹人体安检时的背景噪声。太赫兹源11先通过高速振镜12，再通过太赫兹传输波导13输出，用于消除太赫兹波的相干性，便于得到各向偏振的太赫兹波。太赫兹传输波导13，是让太赫兹源辐射出的太赫兹波在内部实现漫反射的管道，分为四个端口(或者更多端口，可根据实际需要调整端口数目及位置)从不同角度对目标人物进行均匀照射。太赫兹平面反射镜2水平左右摆动对目标人物1进行单行扫描(或者竖直上下摆动对目标人物1进行单列扫描)，将目标人物1反射出的太赫兹波收集反射至太赫兹聚焦镜3，经太赫兹聚焦镜3聚焦后进入太赫兹探测器4，最后将信号输入图像分析处理模块5得到清晰直观的人体图像。Figure 1 is a schematic diagram showing the structure of the active terahertz human body security system device, by target person 1, terahertz plane mirror 2, terahertz focusing mirror 3, terahertz detector 4, image analysis processing module 5, jet device 6, Target automatic sensing device 7 (uvwx-lqtk), baffle 8 (pmqt-onrs), device housing 9 (abcd-efgh), background board 10 (daeh-jilk), terahertz source 11, high speed galvanometer 12 and terahertz The transmission waveguide 13 (including four ports A, B, C, and D) is composed. Among them, the jet device 6 sprays dry cold air to the target person 1, blows off the dust and moisture attached to the target person 1, and lowers the temperature of the target person's surface, making the sensor easier to detect, thereby increasing the contrast, thereby obtaining A clearer picture of the human body. The purpose of the target automatic sensing device 7 is that when the target person 1 is located at the designated position, the target automatic sensing device senses that the other devices are in the ready working state. The baffle 8 can be selected from Teflon, polyethylene, etc., which transmits terahertz to block visible light, and is used to isolate the target person 1 from the rear detecting device. The device casing 9 may be made of a metal material having a certain hardness such as stainless steel or alloy for protecting the entire system. The background plate 10 is a material that absorbs terahertz waves and is used to reduce background noise during terahertz human body security. The terahertz source 11 is first passed through the high speed galvanometer 12 and then output through the terahertz transmission waveguide 13 for eliminating the coherence of the terahertz wave, thereby facilitating the obtaining of the polarization terahertz waves. The terahertz transmission waveguide 13 is a pipe for diffusing reflection of the terahertz wave radiated from the terahertz source, and is divided into four ports (or more ports, which can adjust the number and position of the port according to actual needs) from different angles. The target person is evenly illuminated. The terahertz plane mirror 2 swings horizontally left and right to perform a single line scan on the target person 1 (or a vertical scan of the target person 1 by vertical up and down swing), and collects and reflects the terahertz wave reflected by the target person 1 to the terahertz focusing mirror 3, After being focused by the terahertz focusing mirror 3, it enters the terahertz detector 4, and finally the signal is input to the image analysis processing module 5 to obtain a clear and intuitive human body image.
在下面的实例中，目标人物以一个成年人为例，太赫兹平面反射镜以镀银膜的平面反射镜为例，太赫兹聚焦镜以抛物面银镜为例，太赫兹源以中心频率为94G的太赫兹源为例，太赫兹传输波导以材料铝为例，其他波段的微波和红外波与上述实施方法一致，只需将所有器件换成对应波段适用的器件即可。
In the following example, the target person takes an adult as an example. The terahertz plane mirror is a silver-plated plane mirror. The terahertz focusing mirror uses a parabolic silver mirror as an example. The terahertz source has a center frequency of 94G. The terahertz source is taken as an example. The terahertz transmission waveguide is exemplified by the material aluminum. The microwave and infrared waves in other bands are the same as the above-mentioned implementation method, and only all the devices need to be replaced with the corresponding devices for the corresponding band.
主动式太赫兹安检***中，根据一个正常成年人的体型(体积约为180cm*60cm*30cm)设置了扫描目标板的高度为2米，宽度为1米。具体调节过程如下：当人站到指定位置时，目标自动感应装置7感应后使其他设备均处于准备工作状态，然后上方的喷气装置6喷出干燥冷空气，吹走附着在目标人物1周围的灰尘及水汽，让目标人物表面的温度下降一点，让传感器更容易检测到，便于增加对比度，从而得到更加清晰的人体图像。太赫兹源11辐射出的太赫兹波在太赫兹传输波导13内漫反射，通过挡板后的四个A、B、C、D四个端口对目标人物1进行均匀照射，太赫兹波被目标人物身体表面反射出后到达平面反射镜2(直径为40cm的银膜平面反射镜)，平面反射镜2水平左右摆动进行单行扫描，单行扫描宽度为1米(或者竖直上下摆动对目标人物1同时进行单列扫描，单列扫描宽度为2米)，单行或单列扫描后平面反射镜2再转动角度继续下一行或下一列的扫描，直至扫描完整个目标板的面积。最终将人体漫反射的不同方向的太赫兹波不断收集并反射至太赫兹聚焦镜3(焦距为50cm的抛物面银镜)，聚焦后进入太赫兹探测器4，最后将信号输入图像分析处理模块5得到清晰直观的人体图像。由于太赫兹波可以透过布料，而刀具等金属制品会阻碍太赫兹波的传播，故从扫描得到的人体图像就可直接判断此人是否携带危险品。In the active terahertz security system, the height of the scanning target plate is set to 2 meters and the width is 1 meter according to the size of a normal adult (the volume is about 180 cm * 60 cm * 30 cm). The specific adjustment process is as follows: when the person stands at the designated position, the target automatic sensing device 7 senses that the other devices are in the ready-to-work state, and then the upper jet device 6 ejects dry cold air and blows away the target person 1 around. Dust and moisture make the temperature of the target person's surface drop a little, making the sensor easier to detect, and it is easy to increase the contrast, resulting in a clearer image of the human body. The terahertz wave radiated by the terahertz source 11 is diffusely reflected in the terahertz transmission waveguide 13, and the target person 1 is uniformly irradiated through the four ports A, B, C, and D behind the baffle, and the terahertz wave is targeted. After the body surface is reflected out, it reaches the plane mirror 2 (the silver film plane mirror with a diameter of 40cm), and the plane mirror 2 swings horizontally to the left and right for a single line scan. The single line scan width is 1 meter (or the vertical up and down swing to the target person 1 Simultaneously, a single column scan is performed, and the width of the single column scan is 2 meters. After the single row or single column scan, the plane mirror 2 is rotated again to continue the scanning of the next row or the next column until the area of the entire target plate is scanned. Finally, the terahertz waves in different directions of the diffuse reflection of the human body are continuously collected and reflected to the terahertz focusing mirror 3 (parabolic silver mirror with a focal length of 50 cm), and then focused into the terahertz detector 4, and finally the signal is input to the image analysis processing module 5 Get a clear and intuitive image of the human body. Since terahertz waves can pass through the fabric, and metal products such as knives can block the propagation of terahertz waves, the human body image obtained by scanning can directly determine whether the person carries dangerous goods.
由于人体能漫反射微波、太赫兹波、红外波这些波段的光波，当外加这些波段的光源照射人体时，这些波段的光能透过衣物，可被人体漫反射，却被金属刀或汽油等危险品阻断其传播，所以最终可以通过成像与人体区分出来。因此，该装置对于微波，太赫兹波，红外波均适用。
Since the human body can diffusely reflect the light waves of the microwave, terahertz wave, and infrared waves, when the light source of these bands is applied to the human body, the light of these bands can pass through the clothes and can be diffused and reflected by the human body, but it is replaced by a metal knife or gasoline. Dangerous goods block their spread, so they can eventually be distinguished from the human body by imaging. Therefore, the device is applicable to microwaves, terahertz waves, and infrared waves.
Claims (6)
- 一种主动式太赫兹人体安检***装置，其特征在于，包括目标人物，太赫兹平面反射镜，太赫兹聚焦镜，太赫兹探测器，图像分析处理模块，喷气装置，目标自动感应装置，挡板，装置外壳，背景板，太赫兹源高速振镜以及太赫兹传输波导，太赫兹探测器位于太赫兹聚焦镜焦点处，喷气装置位于目标人物的上面，目标人物的旁边有目标自动感应装置，背景板位于目标人物的后背，挡板位于目标人物与探测装置之间，挡板可透射太赫兹阻挡可见光，太赫兹传输波导多个输出端口位于挡板后面的四个角上，太赫兹源先通过高速振镜，再通过太赫兹传输波导输出，从不同角度对目标人物进行均匀照射，太赫兹平面反射镜水平左右摆动或竖直上下摆动对目标人物进行单行或单列扫描，将目标人物反射出的太赫兹波收集反射至太赫兹聚焦镜，经太赫兹聚焦镜聚焦后进入太赫兹探测器，太赫兹探测器将信号输入图像分析处理模块得到清晰直观的人体图像，所有部件置于封闭装置外壳内。An active terahertz human body security system device, comprising: a target person, a terahertz plane mirror, a terahertz focusing mirror, a terahertz detector, an image analysis processing module, a jet device, a target automatic sensing device, a baffle , device housing, background plate, terahertz source high-speed galvanometer and terahertz transmission waveguide, terahertz detector is located at the focus of the terahertz focusing mirror, the jet device is located above the target person, and the target person is next to the target automatic sensing device, background The board is located on the back of the target person. The baffle is located between the target person and the detecting device. The baffle can transmit terahertz to block visible light. The terahertz transmission waveguide has multiple output ports located at the four corners behind the baffle. Through the high-speed galvanometer, and then through the terahertz transmission waveguide output, the target person is uniformly illuminated from different angles, and the terahertz plane mirror swings horizontally from left to right or vertically up and down to scan the target person in a single row or single column to reflect the target person. Terahertz wave collection reflection to terahertz focusing mirror, terahertz focusing mirror Coke into the terahertz detector, the detector signal is input terahertz image analysis processing module of the human body image obtained clear and intuitive, all of the components disposed within the housing closure means.
- 根据权利要求1所述主动式太赫兹人体安检***装置，其特征在于，所述太赫兹平面反射镜，是表面为金属材料的可实现太赫兹波高反射的平面镜。The active terahertz human body security system device according to claim 1, wherein the terahertz planar mirror is a plane mirror having a surface of a metal material and capable of realizing terahertz wave high reflection.
- 根据权利要求1所述主动式太赫兹人体安检***装置，其特征在于，所述太赫兹聚焦镜，是表面为金属材料的可同时实现太赫兹波高反射和太赫兹波聚焦的抛物面镜或者椭球镜。The active terahertz human body security system device according to claim 1, wherein the terahertz focusing mirror is a parabolic mirror or an ellipsoid whose surface is made of a metal material and can simultaneously achieve terahertz wave reflection and terahertz wave focusing. mirror.
- 根据权利要求1所述主动式太赫兹人体安检***装置，其特征在于，所述挡板选可以透射太赫兹阻挡可见光的特氟龙或聚乙烯材料。The active terahertz human body security system apparatus according to claim 1, wherein said baffle plate is adapted to transmit a Teflon or polyethylene material that blocks terahertz from visible light.
- 根据权利要求1所述主动式太赫兹人体安检***装置，其特征在于，所述背景板选用可吸收太赫兹波的材料，用于减小太赫兹人体安检时的背景噪声。The active terahertz human body security system device according to claim 1, wherein the background plate is made of a material capable of absorbing terahertz waves for reducing background noise during terahertz human body security.
- 根据权利要求1至5所述主动式太赫兹人体安检***装置的调整方法，其特征在于，目标人物站到指定位置时，目标自动感应装置感应到有待测物体时，喷气装置向目标人物喷出干燥冷空气，吹走附着在目标人物周围的灰尘及水汽，且让目标人物表面的温度下降，提高传感器检测目标物的信噪比，太赫兹源辐射出的太赫兹波在太赫兹传输波导内漫反射，通过挡板后的多个输出端口对目标人物1进行均匀照射，太赫兹平面反射镜水平左右摆动或竖直上下摆动对目标人物进行单行或单列扫描，将人体漫反射的太赫兹波收集分别反射至太赫兹聚焦镜上， 聚焦后进入太赫兹探测器，太赫兹探测器将信号输入图像分析处理模块得到清晰直观的人体图像。 The method for adjusting an active terahertz human body security system device according to any one of claims 1 to 5, characterized in that, when the target person stands at the designated position, when the target automatic sensing device senses the object to be measured, the jet device sprays the target person Dry and cool air, blow away the dust and moisture attached to the target person, and let the temperature of the target person's surface drop, improve the signal-to-noise ratio of the sensor detection target, and the terahertz source radiates the terahertz wave in the terahertz transmission waveguide. Diffuse reflection inside, through the multiple output ports behind the baffle to uniformly illuminate the target person 1, the terahertz plane mirror swings horizontally left or right or vertically up and down to scan the target person in a single row or single column, and the human body diffusely reflects the terahertz The wave collection is separately reflected onto the terahertz focusing mirror, After focusing, it enters the terahertz detector, and the terahertz detector inputs the signal into the image analysis processing module to obtain a clear and intuitive human body image.
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| CN111983706A (en) * | 2020-08-24 | 2020-11-24 | 北京航星机器制造有限公司 | Intelligent security check system and security check method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104932029A (en) | 2015-09-23 |
| CN104932029B (en) | 2017-07-18 |
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