WO2021169040A1 - Filter device of adjustable pulsed ray source and portable x-ray inspection device - Google Patents
Filter device of adjustable pulsed ray source and portable x-ray inspection device Download PDFInfo
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- WO2021169040A1 WO2021169040A1 PCT/CN2020/089190 CN2020089190W WO2021169040A1 WO 2021169040 A1 WO2021169040 A1 WO 2021169040A1 CN 2020089190 W CN2020089190 W CN 2020089190W WO 2021169040 A1 WO2021169040 A1 WO 2021169040A1
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- WIPO (PCT)
- Prior art keywords
- filter
- ray source
- ray
- filter device
- pulsed
- Prior art date
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- 238000007689 inspection Methods 0.000 title claims abstract description 23
- 238000003384 imaging method Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 5
- 239000011133 lead Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 19
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005865 ionizing radiation Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 150000002843 nonmetals Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007635 classification algorithm Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/10—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being confined in a container, e.g. in a luggage X-ray scanners
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
Definitions
- the utility model belongs to security inspection equipment, in particular to a filter device of an adjustable pulse type ray source and a portable X-ray inspection device.
- a filter device of an adjustable pulsed ray source and a portable X-ray inspection device are provided to solve the problems involved in the above-mentioned background art.
- the utility model provides a filter device for an adjustable pulsed ray source, which comprises a filter and a fixing member for supporting and fixing the filter and installed at the beam exit of the ray source, and the filter can be Rotate along the pin before the beam exit, and filter low-energy rays through the rotation of the filter to form dual-energy rays.
- the filtering device includes: a fixed ring fixedly installed at the beam exit of the ray source, a supporting fixing member rotatably connected with the fixed ring via a pin, and a filtering fixedly installed in the supporting fixing member Pieces.
- one end of the pin shaft is connected with the servo motor.
- the filter is a cylinder made of one of lead, tungsten, copper, iron, antimony, and nickel.
- the fixed ring and the radiation source are connected in a detachable connection manner.
- the utility model also provides an adjustable pulse type flat-panel portable X-ray inspection device using the filter device, which includes four parts: a ray source, a filter device, a detector, and a control device.
- the ray source is a tunable pulsed ray source, which can emit at least two types of high-energy rays and low-energy rays;
- the filter device is installed in front of the beam exit of the ray source. It includes a filter, and a fixing member for supporting and fixing the filter, and the fixing member can rotate along the pin at the beam exit and pass Rotation of the filter to filter low-energy rays;
- Detector capable of receiving image data of high-energy rays and low-energy rays
- the control device is a portable notebook computer, which is connected to the pulsed ray source, the filter device and the detector with signals, and controls the beam emission and imaging of the pulsed ray source.
- the ray source is one or a combination of any number of ionizing radiation sources of gamma radiation and X-rays.
- the signal connection is to respectively connect the pulsed ray source and the flat panel detector through a cable, or connect through a wireless communication signal.
- one end of the pin shaft is connected with the servo motor.
- the filter is a cylinder made of one of lead, tungsten, copper, iron, antimony, and nickel.
- the fixed ring and the radiation source are connected in a detachable manner.
- the utility model relates to an adjustable pulse-type flat-panel portable X-ray inspection device.
- a pulse-type X-ray source and a flat-panel detector By adopting a pulse-type X-ray source and a flat-panel detector, an X-ray transmission imaging method is applied.
- the imaging principle is to control the pulse number and the pulse number of the pulse-type X-ray source.
- the filter device at the front end of the X-ray source allows two X-rays of different energy to perform transmission imaging of the same object under inspection, and then perform algorithmic processing on the two imaging signals of different energy to obtain the equivalent atomic number of the object to be inspected , So as to realize the material identification and complete the inspection of objects including luggage, parcels or mail.
- Figure 1 is a schematic diagram of the structure of the utility model.
- Figure 2 is a schematic diagram of the structure of the filter device of the present invention.
- Figure 3 is a schematic diagram of the structure of each material step tool in the present invention.
- the reference numerals are: X-ray source 1, filter device 2, flat panel detector 3, cable 4, notebook computer 5, fixed ring 6, filter 7, fixed piece 8, pin 9.
- a filter device for an adjustable pulsed ray source includes: a filter 7 and a fixing member for supporting and fixing the filter 7, and installed at the beam exit of the ray source 1. 8, and the filter 7 can be rotated along the pin 9 before the beam exit, and low-energy rays are filtered through the rotation of the filter 7 to form dual-energy rays.
- the filter 7 rotates to a position close to the fixed ring 6, the filter 7 is on the X-ray optical path, and the low-energy part of the X beam emitted by the X-ray source 1 will be filtered by the filter 7, and the flat panel detector 3 receives it. It is high-energy data; when the filter 7 is in the position shown in Figure 2, the flat-panel detector receives a low-energy image, forming dual-energy rays.
- the motor automatic mode is adopted in this embodiment, and a small servo motor is connected to one end of the pin shaft 9. The rotation of the small servo motor drives the filter 7 and its fixing member 8 to surround The pin 9 rotates.
- the filter 7 adopts a material of aluminum, lead, tungsten, copper, iron, antimony, nickel and other metals, a metal material alloy, or many of them.
- a foil made of an alloy of two metal materials can be determined according to the actual situation.
- the fixed ring and the radiation source are connected in a detachable connection manner. It is convenient to install the filter device and improve portability.
- an adjustable pulse type flat-panel portable X-ray inspection device includes: a pulse adjustable X-ray source 1, a filter device 2, a flat panel detector 3, a cable 4, and a portable notebook computer 5.
- the portable notebook computer 5 is respectively connected with the pulsed X-ray source 1 and the flat-panel detector through the cable 4, and the pulsed adjustable X-ray source 1 is controlled by software to emit beams and imaging.
- the filter device is fixed in front of the beam exit of the ray source by a fixing ring 6, and the filter 7 and its fixing member 8 can rotate around the pin 9.
- the filter 7 When the filter 7 rotates to a position close to the fixed ring 6, the filter 7 is on the X-ray optical path, and the low-energy part of the X beam emitted by the X-ray source 1 will be filtered by the filter 7, and the flat panel detector 3 receives it. It is high-energy data; when the filter 7 is in the position shown in Figure 2, the flat-panel detector receives a low-energy image. As shown in FIG. 2, the lifting and lowering of the filter 7 is completed manually.
- the automatic motor mode is adopted, and a small servo motor is connected to one end of the pin shaft 9.
- the rotation of the small servo motor drives the filter 7 and its fixing member 8 to rotate around the pin shaft 9 .
- the radiation source in the present invention can be gamma radiation, X-ray or any number of ionizing radiation sources.
- X-ray transmission, X-ray backscatter, X-ray CT, etc. form a pulsed cone beam; the detector is a flat-panel detector.
- the signal connection between the pulse-tunable X-ray source 1, the filter device 2, the flat-panel detector 3, and the portable notebook computer 5 is not limited to connecting the pulse-type ray source and the flat-panel detector through cables. Can be connected via wireless communication signals.
- Step 1 First lift up the filter device 2 in front of the X-ray source 1's beam exit, set the single exposure pulse number N 1 of the pulse X-ray machine, and collect the X-ray light intensity I ol , if you remember the lifted state
- the attenuation coefficient of the filter device is A 1 , then the radiation dose I ol of a single exposure at this time is proportional to N 1 ⁇ (1-A 1 );
- Step 2 Put down the filter device before the beam exit of X-ray source 1, Set a different pulse X-ray machine single exposure pulse number N 2 , the collected X-ray light intensity I oh , if the attenuation coefficient of the filter device in the down state is A_2, and A 2 > A 1.
- the filter device filters a part of low-energy X-rays
- the average energy of X-rays in step 2 is higher than the average energy of X-rays in step 1.
- the state of step 1 is also referred to as low energy
- the state of step 2 is high energy.
- Carry out material calibration first lift the filter device in front of the X-ray source 1's beam exit, set the pulse number N 1 of the X-ray machine, and place a step-thick material test body (shape) between the X-ray source 1 and the flat panel detector. Refer to Figure 3) to obtain the low-energy projection data of each material; then put down the filter device in front of the X-ray source 1 and set the pulse number A_2 of the X-ray machine to obtain the high-energy projection data of each material.
- the method of lifting and lowering the filter device can be done manually or by a servo motor installed on the filter device, which is automatically controlled by software.
- Use a T ⁇ T Gaussian filter (T 5 in the embodiment) to smooth the area data, and calculate the average value of each area to obtain low-energy imaging data I l and high-energy imaging data I h for each material step.
- I h I oh ⁇ exp(- ⁇ h l ),
- I h I ol ⁇ exp(- ⁇ l l ),
- a n is the coefficient of the fitting polynomial
- I h and I l are the light intensity of the high and low energy X-rays incident on the detector
- I oh and I ol are the output light intensity of the high and low energy X-ray sources, respectively
- ⁇ h and ⁇ l is the linear attenuation coefficient of the same substance at high and low energies
- l is the thickness of the substance along the path of radiation.
- the actual X-ray source 1 emits multi-chromatograms.
- multi-chromatographic X-rays there are:
- I L ⁇ 0 Em S L (E) ⁇ exp( ⁇ s - ⁇ (E,S)sds)dE
- I H ⁇ 0 Em S H (E) ⁇ exp( ⁇ s - ⁇ (E,S)sds)dE
- n generally takes 3
- a n is the corresponding constant, the calculated R values are relatively constant.
- the data of the curve is saved in the substance classification file of the supporting software of the portable X-ray inspection device.
- the substance classification file does not need to be regenerated before each shooting; the substance classification file needs to be regenerated only when the device is not used for a long time or when the device is used too frequently, which causes the emission spectrum of the X-ray source 1 to drift or change.
- Photograph the object to be detected place the object to be detected between the flat panel detector and the ray source, first lift the filter device, emit low-energy X-ray pulses, and collect the low-energy data of the object to be measured; then lower the filter device to collect High-energy data of the measured object.
- the dual energy R value of the object to be measured is calculated, and the substance areas with different R values are given different colors for display.
- the specific steps are: lift the filter device 2 at the beam exit of the X-ray source 1, place the object to be detected between the flat panel detector 3 and the pulse-tunable X-ray source 1, operate the software in the portable notebook computer 5, and set
- the pulse X-ray source 1 has a single exposure pulse number N1 and starts to emit beams.
- the flat-panel detector 3 will receive X-rays, convert them into digital images and send them to the portable notebook computer 5. This image is a low-energy image of the object to be measured .
- the filter device 2 at the beam exit of the X-ray source 1 is put down, the single exposure pulse number N2 of the pulsed X-ray source 1 is set and the beam is emitted, and the flat panel detector 3 receives the high-energy image data of the object to be measured.
- the low-energy and high-energy two images are processed by the substance classification algorithm in the software to generate dual-energy images that can distinguish inorganic substances, mixtures and organic substances by color. Different R corresponds to different equivalent atomic numbers, and lower equivalent atomic numbers have lower R values.
- substances with relatively low equivalent atomic numbers are displayed in orange, and the equivalent atomic number is displayed.
- Medium substances usually aluminum, water, glass and other light metals and heavy non-metals, generally R is between 1.3 and 1.5
- substances with higher equivalent atomic numbers usually metals such as iron, steel, copper, etc.
- R is between 1.6 and 1.9
- the display brightness is determined according to the gray value of the pixel, so that the user of the device can directly observe the material of the inspected item (ie, equivalent atom) on the software interface. Ordinal).
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- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- High Energy & Nuclear Physics (AREA)
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Abstract
Description
Claims (10)
- 一种可调脉冲式射线源的滤波装置,包括,滤波片和用于支撑固定所述滤波片、安装在所述射线源的出束口处的固定件,其特征在于:所述滤波片可沿着销轴在出束口前旋转,通过滤波片的转动过滤低能射线,形成双能射线。An adjustable pulsed ray source filter device, comprising: a filter and a fixing member for supporting and fixing the filter and installed at the beam exit of the ray source, characterized in that: the filter can be Rotate along the pin before the beam exit, and filter low-energy rays through the rotation of the filter to form dual-energy rays.
- 根据权利要求1所述的可调脉冲式射线源的滤波装置,其特征在于,所述滤波装置包括:固定安装在射线源出束口的固定环,与所述固定环通过销轴转动连接的支撑固定件,以及固定安装在所述支撑固定件内的滤波件。The filter device of the adjustable pulse ray source according to claim 1, wherein the filter device comprises: a fixed ring fixedly installed at the beam outlet of the ray source, and a fixed ring rotatably connected with the fixed ring through a pin. A supporting fixing piece, and a filter fixedly installed in the supporting fixing piece.
- 根据权利要求2所述的可调脉冲式射线源的滤波装置,其特征在于,所述销轴一端与伺服电机相连接。The filter device of the adjustable pulse ray source according to claim 2, wherein one end of the pin shaft is connected with a servo motor.
- 根据权利要求2所述的可调脉冲式射线源的滤波装置,其特征在于,所述滤波片采用铝、铅、钨、铜、铁、锑、镍中的一种材料制成的箔片。The filter device of the adjustable pulsed radiation source according to claim 2, wherein the filter is a foil made of one of aluminum, lead, tungsten, copper, iron, antimony, and nickel.
- 根据权利要求2所述的可调脉冲式射线源的滤波装置,其特征在于,所述固定环与射线源之间采用可拆卸的连接方式连接。The filter device for an adjustable pulsed ray source according to claim 2, wherein the fixed ring and the ray source are connected in a detachable connection manner.
- 一种应用权利要求1~5任一项所述的滤波装置的可调脉冲式平板便携式X射线检查装置,其特征在于,包括:An adjustable pulse type flat-panel portable X-ray inspection device using the filter device of any one of claims 1 to 5, characterized in that it comprises:射线源,为可调脉冲式射线源,能够发射不同脉冲数量、呈锥形状的X射线;The ray source is a tunable pulsed ray source, which can emit X-rays with different pulse numbers and cone shapes;滤波装置,安装在所述射线源的出束口前,其包括滤波片,和用于支撑固定所述滤波片的固定件,且所述固定件可沿着销轴在出束口旋转,通过滤波片的转动过滤低能射线;The filter device is installed in front of the beam exit of the ray source. It includes a filter, and a fixing member for supporting and fixing the filter, and the fixing member can rotate along the pin at the beam exit and pass through Rotation of the filter to filter low-energy rays;探测器,能够接收高能射线和低能射线的图像数据;Detector, capable of receiving image data of high-energy rays and low-energy rays;控制装置,为便携式笔记本电脑,与所述脉冲式射线源、所述滤波装置和探测器之间信号连接,并控制所述脉冲式射线源的出束及成像。The control device is a portable notebook computer, which is connected to the pulsed ray source, the filter device and the detector with signals, and controls the beam emission and imaging of the pulsed ray source.
- 根据权利要求6所述的可调脉冲式平板便携式X射线检查装置,其特征在于,所述信号连接为通过电缆分别将脉冲式射线源和平板探测器相连接,或通过无线通讯信号连接。The adjustable pulse-type flat-panel portable X-ray inspection device according to claim 6, wherein the signal connection is to respectively connect the pulse-type ray source and the flat-panel detector through a cable, or connect through a wireless communication signal.
- 根据权利要求6所述的可调脉冲式平板便携式X射线检查装置,其特征在于,所述销轴一端与伺服电机相连接。The adjustable pulse type flat-panel portable X-ray inspection device according to claim 6, wherein one end of the pin shaft is connected with a servo motor.
- 根据权利要求6所述的可调脉冲式平板便携式X射线检查装置,其特征在于,所述滤波片铝、铅、钨、铜、铁、锑、镍中的一种材料制成的箔片。The adjustable pulse flat-panel portable X-ray inspection device according to claim 6, wherein the filter is a foil made of one of aluminum, lead, tungsten, copper, iron, antimony, and nickel.
- 根据权利要求6所述的可调脉冲式平板便携式X射线检查装置,其特征在于,所述固定环与射线源之间采用可拆卸的方式连接。The adjustable pulse type flat-panel portable X-ray inspection device according to claim 6, wherein the fixed ring and the radiation source are connected in a detachable manner.
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CN202020201559.1U CN211785227U (en) | 2020-02-24 | 2020-02-24 | Filter device of adjustable pulse type ray source and portable X-ray inspection device |
CN202020201559.1 | 2020-02-24 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4399550A (en) * | 1981-02-27 | 1983-08-16 | General Electric Company | Spinning filter for X-ray apparatus |
CN103099633A (en) * | 2011-11-14 | 2013-05-15 | 三星电子株式会社 | Computed tomography apparatus and control method for the same |
KR20190060052A (en) * | 2017-11-24 | 2019-06-03 | 주식회사 레이 | Computerized Tomography Apparatus of Dual Energy Type Having Linear Actuator |
CN110448320A (en) * | 2019-08-01 | 2019-11-15 | 新里程医用加速器(无锡)有限公司 | For the bulb tube component of CBCT system and the method for reconstructing of dual intensity three-dimensional volumetric images |
CN111077171A (en) * | 2020-02-24 | 2020-04-28 | 南京全设智能科技有限公司 | Adjustable pulse type flat portable X-ray inspection device and dual-energy material distinguishing method thereof |
-
2020
- 2020-02-24 CN CN202020201559.1U patent/CN211785227U/en active Active
- 2020-05-08 WO PCT/CN2020/089190 patent/WO2021169040A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4399550A (en) * | 1981-02-27 | 1983-08-16 | General Electric Company | Spinning filter for X-ray apparatus |
CN103099633A (en) * | 2011-11-14 | 2013-05-15 | 三星电子株式会社 | Computed tomography apparatus and control method for the same |
KR20190060052A (en) * | 2017-11-24 | 2019-06-03 | 주식회사 레이 | Computerized Tomography Apparatus of Dual Energy Type Having Linear Actuator |
CN110448320A (en) * | 2019-08-01 | 2019-11-15 | 新里程医用加速器(无锡)有限公司 | For the bulb tube component of CBCT system and the method for reconstructing of dual intensity three-dimensional volumetric images |
CN111077171A (en) * | 2020-02-24 | 2020-04-28 | 南京全设智能科技有限公司 | Adjustable pulse type flat portable X-ray inspection device and dual-energy material distinguishing method thereof |
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