CN217878900U - Active terahertz imaging human body security check instrument - Google Patents
Active terahertz imaging human body security check instrument Download PDFInfo
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- CN217878900U CN217878900U CN202221354424.4U CN202221354424U CN217878900U CN 217878900 U CN217878900 U CN 217878900U CN 202221354424 U CN202221354424 U CN 202221354424U CN 217878900 U CN217878900 U CN 217878900U
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Abstract
The utility model provides an active terahertz imaging human body security check instrument, which comprises a main body supporting frame and a section aluminum frame, wherein the section aluminum frame is arranged inside the main body supporting frame, and a terahertz solid source, a motion scanning system, a terahertz imaging system and a system computer are arranged on the section aluminum frame; terahertz imaging system is connected with the signal input part of system's computer now for receive by the terahertz optical signal who is examined the object reflection, motion scanning system's input is connected with the output of system's computer, system's computer is used for giving motion scanning system output control signal, the utility model discloses an active terahertz security check appearance is through transmission and receiving terahertz light now, and the signal to noise ratio of signal is high, and image resolution is higher, and the imaging effect is more clear, and is low in order to solve current security check equipment imaging definition, and the false alarm rate is higher, easily causes bodily injury, the problem that wastes time and energy during the security check.
Description
Technical Field
The utility model relates to a terahertz is safety inspection appearance technical field now, especially relates to for an active terahertz is imaging human safety inspection appearance now.
Background
THz waves refer to electromagnetic radiation having a frequency in the range of 0.1 to 10THz (wavelength 3000 to 30 microns). The wavelength band of which lies in a rather broad range of electromagnetic radiation between microwave and infrared light. This spectrum, which encompasses a spectrum from a portion of the millimeter wave band (about 0.1 THz) to the far infrared (about 25 THz), is a very important spectrum in condensed state physics research because it contains many important energy levels that determine the properties of a material. The photon energy of the terahertz light is only meV (millielectron volt), so that the terahertz light is completely harmless to a human body, is a green waveband, and can penetrate through clothes by utilizing an active terahertz light source to realize active imaging detection on the human body.
The prior domestic security inspection mode mainly adopts separation inspection of people and goods, and the goods are inspected by X-ray, so that explosives, drugs and liquid are difficult to be effectively identified; the human body detection mainly comprises metal detection, body searching and unpacking inspection, and is time-consuming and labor-consuming. The ionizing radiation of X-rays in the traditional security check mode is very large, and although goods can be effectively checked, the X-ray security check method has great harm to human bodies and cannot be used for human body security check. Use metal detector to carry out security check then can only specific metal object to inspect to the human body, and the wrong report rate is higher, and the most traditional mode of searching for one's body causes the infringement easily to individual privacy and the cost of labor is high, wastes time and energy during the security check.
The existing terahertz security inspection mode mainly comprises passive terahertz security inspection, and the passive terahertz security inspection principle is that imaging is carried out by using weak terahertz radiation signals emitted by a human body or an object, so that the signal-to-noise ratio of the signals is low, and the imaging definition is very low.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing an active terahertz is human security check appearance of formation of image now, then through transmission and receiving terahertz light through active terahertz security check appearance now, the signal to noise ratio of signal is high, and image resolution is higher, and the imaging effect is more clear to it is low to solve current security check equipment imaging definition, and the misstatement rate is higher, easily causes bodily injury, the problem that wastes time and energy during security check.
In order to achieve the above purpose, the present invention is realized by the following technical solution: an active terahertz imaging human body security check instrument comprises a main body supporting frame and a shaped aluminum frame, wherein the shaped aluminum frame is arranged inside the main body supporting frame, and a terahertz solid source, a motion scanning system, a terahertz imaging system and a system computer are mounted on the shaped aluminum frame;
the terahertz imaging system is connected with a signal input end of a system computer and used for receiving terahertz optical signals reflected by an object to be detected, the input end of the motion scanning system is connected with an output end of the system computer, the system computer is used for outputting control signals to the motion scanning system, and the motion scanning system is used for driving the terahertz imaging system to move up and down.
Furthermore, the terahertz imaging system comprises a light processing module and an imaging module, wherein the output end of the light processing module is connected with the input end of the imaging module.
Furthermore, the light processing module comprises a light amplifying unit, a light shaping unit and a light receiving unit, wherein the output end of the light amplifying unit is connected with the input end of the light shaping unit, the output end of the light shaping unit is connected with the input end of the light receiving unit, and the output end of the light receiving unit is connected with the input end of the imaging module.
Further, the motion scanning system comprises a motion output unit, the motion output unit is set to be a single-shaft transmission motor, and the single-shaft transmission motor is used for realizing vertical reciprocating scanning motion.
Further, the imaging module is configured as a 340GHz focal plane line array camera.
Furthermore, a front cover panel is arranged on the front side of the main body supporting frame, and the front cover panel is made of high-density polyethylene.
The utility model has the advantages that: the active terahertz imaging human body security check instrument has the advantages of small volume, compact structure, light overall weight, convenient movement, high system imaging speed, complete scanning and imaging of a human body only needing 2 seconds, high imaging precision and imaging resolution ratio reaching 3mm; the active terahertz security check instrument transmits and receives terahertz light, the signal-to-noise ratio of signals is high, the image resolution is higher, the imaging effect is clearer, the 340GHz terahertz solid source is small in size, the 340GHz terahertz solid source is very suitable for being used as a light source of the active terahertz security check instrument in terms of product volume and easiness in operation, the clearer imaging effect can be achieved, and the active terahertz human body security check instrument using the 340GHz solid source as the light source can achieve the ideal human body imaging effect by combining the image processing and other technologies.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a rear side axial view of the present invention;
FIG. 2 is a front side axial view of the present invention;
fig. 3 is a schematic block diagram of the present invention.
In the figure: 1. a main body support frame; 2. a terahertz solid source; 3. a motion scanning system; 4. a system computer; 5. a profiled aluminum frame; 6. a housing front panel; 7. a light processing module; 8. an imaging module.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1-3, an active terahertz imaging human body security inspection instrument includes a main body support frame 1 and a shaped aluminum frame 5, wherein the shaped aluminum frame 5 is disposed inside the main body support frame 1, the shaped aluminum frame 5 is convenient to mount and fix internal optical components, and aluminum materials are adopted to ensure the structural strength and make the overall weight lighter; the front side of main part carriage 1 is provided with dustcoat front panel 6, dustcoat front panel 6 sets up to the high density polyethylene material, and the loss of high density polyethylene to terahertz light is very little, makes the security check appearance more pleasing to the eye when can guaranteeing the system performance.
The terahertz solid source 2, the motion scanning system 3, the terahertz imaging system and the system computer 4 are installed on the aluminum frame 5; the terahertz solid source 2 adopts a 0.34 terahertz solid frequency doubling source, and is small in size and stable in output. The power of 340GHz electromagnetic waves emitted to the target object by the terahertz solid source 2 is not less than 10mW, and the high-resolution detection of the target object can be realized at a distance of 80-120 cm. The scanning imaging time is about 2 seconds, the signal to noise ratio is greatly increased due to the adoption of active emission, the resolution ratio can reach 3 millimeters, and more precise imaging is helpful for better contraband confirmation.
The terahertz imaging system is connected with a signal input end of the system computer 4 and used for receiving terahertz optical signals reflected by an object to be detected, an input end of the motion scanning system 3 is connected with an output end of the system computer 4, the system computer 4 is used for outputting control signals to the motion scanning system 3, and the motion scanning system 3 is used for driving the terahertz imaging system to move up and down.
The terahertz imaging system comprises a light processing module 7 and an imaging module 8, wherein the output end of the light processing module 7 is connected with the input end of the imaging module 8.
The light processing module 7 comprises a light amplifying unit, a light shaping unit and a light receiving unit, wherein the output end of the light amplifying unit is connected with the input end of the light shaping unit, the output end of the light shaping unit is connected with the input end of the light receiving unit, and the output end of the light receiving unit is connected with the input end of the imaging module 8. The light amplifying unit, the light shaping unit and the light receiving unit adopt the condensing mirrors with different sizes and focal lengths.
Specifically, when the terahertz light is actually operated, the terahertz light is converted into terahertz light with a width reaching the width capable of scanning a human body through the terahertz light amplifying unit, the terahertz light is subjected to energy concentration through the light shaping unit, the terahertz light is irradiated onto an object to be detected, the returned terahertz light is received by the light receiving unit, the received light is collected and imaged by the imaging module 8, as the laser output by the terahertz solid source 2 and the image received by the terahertz camera are continuous, and the terahertz imaging system is completely fixed on the motion scanning system 3, the motion scanning system 3 is subjected to rapid vertical scanning movement, and finally the data are transmitted to the system computer 4, a complete human body scanning image can be formed in the system computer 4, the motion scanning system 3 comprises a motion output unit which is set as a single-shaft transmission motor which is used for realizing vertical reciprocating scanning movement, the positioning accuracy is high, and after the data are communicated with the system computer 4, the imaging module 8 is controlled by the system computer 4, the imaging module 8 is set as a 340GHz focal plane camera array, the 340GHz focal plane line array camera is a terahertz camera, and the 128-line array camera is set as a 128-line terahertz focal plane camera, and 32 line receiving units are arranged in a total.
Referring to fig. 3, in particular, the principle of the security check device in practical application is as follows: the terahertz imaging system is connected with a signal input end of a system computer 4 and used for receiving terahertz optical signals reflected by an object to be detected, the motion scanning system 3 needs a motion control system module for control, the input end of the motion control system is connected with the output end of the system computer 4, the output end of the motion control system is connected with the motion scanning system 3, the system computer 4 sends an instruction, the motion scanning system 3 is controlled to operate through a relay of the motion control system, meanwhile, the terahertz imaging system receives the terahertz optical signals and inputs images into the system computer 4 to form finished human body terahertz security inspection images, and the system computer 4 distinguishes the images and prompts a security inspector to perform next processing.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An active terahertz imaging human body security check instrument is characterized by comprising a main body supporting frame (1) and a type aluminum frame (5), wherein the type aluminum frame (5) is arranged inside the main body supporting frame (1), and a terahertz solid source (2), a motion scanning system (3), a terahertz imaging system and a system computer (4) are installed on the type aluminum frame (5);
the terahertz imaging system is connected with a signal input end of a system computer (4) and used for receiving terahertz optical signals reflected by a detected object, an input end of the motion scanning system (3) is connected with an output end of the system computer (4), the system computer (4) is used for outputting control signals to the motion scanning system (3), and the motion scanning system (3) is used for driving the terahertz imaging system to move up and down.
2. The active terahertz imaging human body security inspection instrument according to claim 1, characterized in that: the terahertz imaging system comprises a light processing module (7) and an imaging module (8), wherein the output end of the light processing module (7) is connected with the input end of the imaging module (8).
3. The active terahertz imaging human body security inspection instrument according to claim 2, characterized in that: the light processing module (7) comprises a light amplifying unit, a light shaping unit and a light receiving unit, wherein the output end of the light amplifying unit is connected with the input end of the light shaping unit, the output end of the light shaping unit is connected with the input end of the light receiving unit, and the output end of the light receiving unit is connected with the input end of the imaging module (8).
4. The active terahertz imaging human body security inspection instrument according to claim 1, characterized in that: the motion scanning system (3) comprises a motion output unit, the motion output unit is a single-shaft transmission motor, and the single-shaft transmission motor is used for realizing vertical reciprocating scanning motion.
5. The active terahertz imaging human body security inspection instrument according to claim 2, characterized in that: the imaging module (8) is arranged as a 340GHz focal plane line array camera.
6. The active terahertz imaging human body security inspection instrument according to claim 1, characterized in that: the front side of the main body supporting frame (1) is provided with an outer cover front panel (6), and the outer cover front panel (6) is made of high-density polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221354424.4U CN217878900U (en) | 2022-06-01 | 2022-06-01 | Active terahertz imaging human body security check instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221354424.4U CN217878900U (en) | 2022-06-01 | 2022-06-01 | Active terahertz imaging human body security check instrument |
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| Publication Number | Publication Date |
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| CN217878900U true CN217878900U (en) | 2022-11-22 |
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|---|---|---|---|
| CN202221354424.4U Active CN217878900U (en) | 2022-06-01 | 2022-06-01 | Active terahertz imaging human body security check instrument |
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| CN (1) | CN217878900U (en) |
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- 2022-06-01 CN CN202221354424.4U patent/CN217878900U/en active Active
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Address after: 230000, 1st Floor, Building 1, Zhongke University Alumni Innovation Park, Luyang Industrial Park, Luyang District, Hefei City, Anhui Province Patentee after: Anhui Zhongke Terahertz Technology Co.,Ltd. Address before: 230000 1st floor, building 2, Xinglu science and Technology Industrial Park, Luyang Economic Development Zone, Hefei, Anhui Province Patentee before: Anhui Zhongke Terahertz Technology Co.,Ltd. |