| NUCTECH COMPANY LIMITED Patent applications |
| Patent application number | Title | Published |
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| 20130094625 | X RAY SOURCE GRATING STEPPING IMAGING SYSTEM AND IMAGE METHOD - An X-ray imaging system comprising: an X-ray source, a source grating, a fixed grating module and an X-ray detector, which are successively positioned in the propagation direction of X-ray; an object to be detected is positioned between the source grating and the fixed gating module; said source grating can perform stepping movement in a direction perpendicular to the optical path and grating stripes; wherein the system further comprises a computer workstation for controlling said X-ray source, source grating and X-ray detector so as to perform the following processes: the source grating performs stepping movement in at least one period thereof; at each stepping step, the X-ray source emits X-ray to the object to be detected, and the detector receives the X-ray at the same time; wherein after at least one period of stepping and data acquisition, the light intensity of X-ray at each pixel point on the detector is represented as a light intensity curve; the light intensity curve at each pixel point on the detector is compared with a light intensity curve in the absence of the object to be detected, a pixel value of each pixel point is calculated from change in said light intensity curve; an image of the detected object is reconstructed according to the calculated pixel value. | 04-18-2013 |
| 20130026383 | Method for Imaging Object Using Photoneutron Transmission and Detector Arrays Using the Same - A method for imaging an object by means of photoneutron transmission is provided, which comprises the steps of: collimating the photoneutron rays passing through the object by means of a neutron collimator so as to determine the position information of the photoneutron rays based on the position of the neutron collimator; detecting the collimated photoneutron ray beams by means of a detector module, wherein the detector module includes a neutron moderator and at least one thermal neutron detector located within the neutron moderator, wherein the neutron moderator converts the photoneutrons into thermal neutrons, and wherein the thermal neutron detector measures the thermal neutrons so as to obtain attenuation information of the photoneutron ray beams upon passing through the object; and integrating the position information and the attenuation information so as to form an image of the corresponding part of the object. The method determines the position of the photoneutron rays based on the position of a neutron collimator, so as to overcome the problem of incapability of imaging due to loss of position information of the photoneutrons during moderation thereof. The method also images the object by arranging detector module arrays. | 01-31-2013 |
| 20130009068 | RADIATION DETECTOR, IMAGING DEVICE AND ELECTRODE STRUCTURE THEREOF, AND METHOD FOR ACQUIRING AN IMAGE - The present invention discloses a radiation detector, an imaging device and an electrode structure thereof, and a method for acquiring an image. The radiation detector comprises: a radiation sensitive film, a top electrode on the radiation sensitive film, and an array of pixel units electrically coupled to the radiation sensitive film. Each pixel unit comprises: a pixel electrode (which is configured to collect a charge signal in a pixel area of the radiation sensitive film), a storage capacitor, a reset transistor, a buffer transistor, a column strobe transistor, and a row strobe transistor. The column strobe transistor and the row strobe transistor are connected in series between the buffer transistor and the signal line, and transfer the voltage signal of the corresponding pixel unit in response to a column strobe signal and a row strobe signal. The radiation detector may be used for, for example, X-ray digital imaging. | 01-10-2013 |
| 20120326024 | Detection Method for an Ion Migration Spectrum and an Ion Migration Spectrometer Using the Same Method - A detection apparatus and method for an ion migration spectrum include acquiring an ion migration spectrum of pure carrier gas and an ion migration spectrum of carrier gas containing a test substance sample and performing differential process on the ion migration spectrum of the pure carrier gas and the ion migration spectrum of the carrier gas containing the test substance sample to acquire a differential spectrum. The value of a characteristic peak of the differential spectrum represents properties of the sample of substances. The method avoids interferences on the migration spectrum from interference sources of the apparatus itself, thereby improving detection sensitivity and accuracy of the ion migration spectrum, and migration spectrum shift caused by variations in the environmental conditions can be found and corrected through the differential process on the migration spectrum of the pure carrier gas, thereby achieving self-stableness and self-correction of the ion migration spectrometer. | 12-27-2012 |
| 20120288066 | SCANNING DEVICE USING RADIATION BEAM FOR BACKSCATTER IMAGING AND METHOD THEREOF - Disclosed is a scanning device using radiation beam for backscatter imaging. The scanning device includes a radiation source; a stationary shield plate and a rotary shield body positioned respectively between the radiation source and the subject to be scanned, wherein the stationary shield plate is fixed relative to the radiation source, and the rotary shield body is rotatable relative to the stationary shield plate. The ray passing area permitting the rays from the radiation source to pass through the stationary shield plate is provided on the stationary shield plate, and ray incidence area and ray exit area are respectively provided on the rotary shield body. During the process of the rotating and scanning of the rotary shield body, the ray passing area of the stationary shield plate intersects consecutively with the ray incidence area and the ray exit area of the rotary shield body to form scanning collimation holes. Further, a scanning method using radiation beam for backscatter imaging is also provided. | 11-15-2012 |
| 20120247332 | PRE-CONCENTRATION DEVICE AND METHOD FOR ION MOBILITY DETECTION APPARATUS - The present invention relates to a pre-concentration device and method for an ion mobility detection apparatus. According to an aspect of the invention, there is provided a pre-concentration device comprising: a collecting passage configured to collect a gas mixture including substances to be detected: a sieve provided, in a deploy state, within the collecting passage and configured to separate the substances from the gas mixture, the separated substances being absorbed to the sieve; at least one desorption unit configured to desorb the substances that have been absorbed to the sieve, the sieve being received in a wound state in the desorption unit; and a driving device configured to drive movement of the sieve between an absorption position in which the substances are absorbed to the sieve in the collecting passage, and a desorption position in which the substances are desorbed from the sieve in the at least one desorption unit. | 10-04-2012 |
| 20120200416 | Portable Monitoring Device For Radioactive Substance - A portable radioactive substance monitoring device comprises an elongated cylindrical housing and a base. The housing has a longitudinal axis along a length direction thereof, and contains a hollow section within which are provided: a detector for monitoring radioactive substances; a circuitry connected to the detector for processing detection signals from the detector; and an alarm connected to the circuitry, for sending alarm signals upon detection of the radioactive substances. The housing at a lower end thereof is detachably connected to the base. The device is compact and delicate in structure, and thereby can be carried and used conveniently. | 08-09-2012 |
| 20120168617 | SAMPLING DEVICE FOR ION MIGRATION SPECTROMETER AND METHOD FOR USING THE SAME, AND ION MIGRATION SPECTROMETER - The present invention discloses a sampling device for an ion migration spectrometer (IMS), comprising: an inner sleeve part, inside of which an inner cavity is defined, one end of the inner sleeve part is connected with an inlet of an migration pipe via an inner-layer channel, and the other end of the inner sleeve part is configured with an inner end cap having an inner opening; and an outer sleeve part, which is configured as an eccentric sleeve that is coaxial with the inner sleeve part and able to rotate with respect to the inner sleeve part, so as to form a sleeve cavity between the inner sleeve part and the outer sleeve part, wherein one end of the outer sleeve part is configured with at least one connecting opening that is selectively connected with the inner-layer channel, and the other end of the outer sleeve part is configured with an outer end cap, on which a first outer opening selectively connected with the inner opening and a second outer opening selectively connected with the sleeve cavity are configured, wherein the outer end cap is configured to be able to rotate between a first location and a second location with respect to the inner end cap, so as to selectively introduce a sample to be detected into the inner-layer channel via one of the inner cavity and the sleeve cavity. Moreover, the present invention further relates to a method for solid and gas sampling by using the above sampling device. | 07-05-2012 |
| 20120138783 | ION MOBILITY SPECTROMETER AND METHOD FOR IMPROVING THE DETECTION SENSITIVITY THEREOF - The present invention relates to a method of improving detection sensitivity of an ion mobility spectrometer, comprising: inserting a sample into a sample receiving device of the ion mobility spectrometer; triggering an operation of spectra acquisition through an optocoupler; when the number of the acquired spectra reaches the level required to contain enough information for accurate detection of explosives with relatively high vapor pressure, adding a dopant instantly to the ionization region by controlling the ON/OFF-state of an electromagnetic valve; when the number of the acquired spectra reaches the level required to contain enough information for accurate detection of explosives with relatively low vapor pressure, stopping the acquisition operation, and turning off the electromagnetic valve so as to stop adding the dopant to the ionization region; analyzing all of the acquired spectra to obtain the detection result. The addition time of the dopant is controlled such that the dopant can take effect on the detection of some explosives with relatively low vapor pressure while the explosives which can be detected with higher sensitivity when no dopant is added can be analyzed in the case that the dopant concentration is very low, thereby achieving the optimal detection performance of the apparatus by taking account of its response to various explosives. | 06-07-2012 |
| 20120085909 | MILLIMETER-WAVE INSPECTION APPARATUS - The present invention discloses a millimeter-wave inspection apparatus. The millimeter-wave inspection apparatus comprises: optics devices, configured to receive millimeter-wave energy radiated from an object to be inspected and focus the received millimeter-wave energy; a radiometer receiving device configured to receive the focused millimeter-wave energy and transform the millimeter-wave energy into electrical signal; and an imaging device configured to generate a temperature image of the object to be inspected based on the electrical signal. Compared with the prior art, the millimeter-wave inspection apparatus of the present invention has a simple and compact structure; it would not be harmful to the human health by employing the passive millimeter-wave human body security inspection technology. With the above configuration, the contraband items to be concealed within the human clothing can be efficiently and effectively detected. | 04-12-2012 |
| 20120068078 | RADIATION DETECTOR, IMAGING DEVICE AND ELECTRODE STRUCTURE THEREOF, AND METHOD FOR ACQUIRING AN IMAGE - The present invention discloses a radiation detector, an imaging device and an electrode structure thereof, and a method for acquiring an image. The radiation detector comprises: a radiation sensitive film, a top electrode on the radiation sensitive film, and an array of pixel units electrically coupled to the radiation sensitive film, wherein each pixel unit comprises: a pixel electrode, which is configured to collect a charge signal in a pixel area of the radiation sensitive film; a storage capacitor, which is connected to the pixel electrode, and is configured to store the charge signal collected by the pixel electrode; a reset transistor, which is connected to the pixel electrode, and is configured to clear the charge in the storage capacitor; a buffer transistor, which is connected to the pixel electrode, and is configured to convert the charge signal on the pixel electrode into a voltage signal and transfer the voltage signal to a signal line; a column strobe transistor, which is configured to select a predetermined column of pixel electrodes; and a row strobe transistor, which is configured to select a predetermined row of pixel electrodes, wherein, the column strobe transistor and the row strobe transistor are connected in series between the buffer transistor and the signal line, and transfer the voltage signal of the corresponding pixel unit in response to a column strobe signal and a row strobe signal. The radiation detector may be used for, for example, X-ray digital imaging. | 03-22-2012 |
| 20120014579 | CT DEVICE AND METHOD BASED ON MOTION COMPENSATION - A CT device and method based on motion compensation are proposed. The present invention obtains motion parameters of a target object by using a stereo-vision-based motion measurement system, and then implements motion compensation through the technology based on reconstructed image matrix transformation, thereby obtaining a clear 2D/3D CT image while eliminating motion artifacts. The present invention can effectively eliminate motion artifacts caused by the scanned object's own motions in the CT scanning, and can be easily embedded into the existing CT scanning equipments. The present invention can improve quality of the CT images, and is especially important for CT imaging of some special groups of people that can not control their own motions, such as Parkinson's patients, infants, living mouse and so on. It can also improve ultra-high-resolution imaging of human body. | 01-19-2012 |
| 20110114837 | ION MOBILITY SPECTROMETER - Disclosed is an ion mobility spectrometer. The ion mobility spectrometer comprises a sample injector ( | 05-19-2011 |
| 20110096886 | Method and System for Detecting Special Nuclear Materials - A method and system for detecting special nuclear materials are disclosed. Said method and system detect the special nuclear materials by making use of the photofission characteristic and thermal neutron induced fission characteristic thereof. In one preferred embodiment, the high density and/or high atomic number region in the object to be detected is also detected first as a suspicious region. | 04-28-2011 |
| 20100269930 | Device for Intermittently Jetting Gas - A device for intermittently jetting gas includes a gas source, a gas conduit with one end being communicated with the gas source and the other end being in communication with a nozzle, a rotary disc and a motor, the disc being mounted on a rotating shaft of the motor for rotating along with the shaft, wherein the rotary disc is provided with at least one opening through which a gas in the gas conduit is jetted when the opening is aligned with the outlet of the gas conduit. The device can freely adjust the gas jetting frequency by adjusting the rotation speed of the motor, and thus increase the gas jetting frequency and effectively flow off the suspicious particles carried in the human clothes. | 10-28-2010 |
| 20100028099 | Trailer System for Inspecting Vehicles and Inspection System Having the Same - The present invention discloses a trailer system for inspecting a vehicle inspection, comprising: a trailer having a vehicle body, the trailer bearing a vehicle to be inspected; a turning plate mechanism rotatably provided on an upper surface of the trailer for abutting against wheels of the vehicle to be inspected halting on the trailer; and a turning plate rotation driving mechanism provided on the trailer for driving the turning plate to turn toward the upper surface of the trailer. The trailer system can trail vehicle with various loads passing through an inspection system such as a scanning passage, while bearing heavy load, maintaining the strength and rigidity thereof without damaging the vehicle to be inspected. In addition, the present invention further discloses a radiation imaging inspection system having the same. | 02-04-2010 |
| 20090323894 | DEVICE AND METHOD FOR REAL-TIME MARK OF SUBSTANCE IDENTIFICATION SYSTEM - Disclosed are a method and a device for real-time mark for a high-energy X-ray dual-energy imaging container inspection system in the radiation imaging field. The method comprises the steps of emitting a first main beam of rays and a first auxiliary beam of rays having a first energy, and a second main beam of rays and a second auxiliary beam of rays having a second energy; causing the first and second main beams of rays transmitting through the article to be inspected; causing the first and second auxiliary beams of rays transmitting through at least one real-time mark material block; collecting values of the first and second main beams of rays that have transmitted through the article to be inspected as dual-energy data; collecting values of the first and second auxiliary beams of rays that have transmitted through the real-time mark material block as adjustment parameters; adjusting the set of classification parameters based on the adjustment parameters; and identifying the substance according to the dual-energy data based on adjusted classification parameters. The method according to the invention simplifies the mark procedure for a substance identification subsystem in a high-energy dual-energy system while improves the stability of the material differentiation result of the system. | 12-31-2009 |
| 20090320620 | DOOR-TYPE PASSENGER SECURITY INSPECTION APPARATUS AND METHOD FOR DETECTING CONTRABAND ARTICLES SUCH AS NARCOTIC DRUGS, EXPLOSIVES - The present invention discloses a door-type passenger security inspection apparatus comprising: an air source supplying an air flow; a spraying device for spraying the air flow onto the body and clothes of a passenger being inspected; an air-spray moving device for moving the spraying device; a collecting device for collecting suspicious particles of contraband articles separated from the body and the clothes of the passenger; and a detecting device for detecting the suspicious particles of contraband articles collected by the collecting device. Further, the present invention also provides a method for passenger security inspection on prohibited-articles. With the technical solution of the present inventions contraband articles such as narcotic drugs and explosives may be detected reliably and effectively. Thus, aiming at the requirements of anti terror, the present invention is able to ensure the security of persons and facilities at important occasions, such as airports, stations, national defenses public security, fire protection, anti-terror, customs, environmental protection, scientific research. | 12-31-2009 |
| 20090309013 | Electrode structure for drift tube in ion mobility spectrometer - Disclosed is an electrode structure for a drift tube in IMS comprising a ring electrode, for each of two surfaces of the ring electrode, at least a part adjacent to the inner radius is formed into a cone, and the angles formed between the cones and the axis of the ring electrode are different from each other. The electrode structure of the present invention can alleviate, even eliminate, the accumulation of space charges in the drift tube. Such structure is particularly suitable when the electric field in the drift tube is low in strength or a great number of ions pass through. Meanwhile, the structure allows a significant decrease in the size of the outer radius of the electrode, while the inner radius remains constant. In this way, it is possible to effectively reduce the outline size of the drift tube and thus make the IMS compact. | 12-17-2009 |
| 20090278039 | Detection Method for an Ion Migration Spectrum and an Ion Migration Spectrometer Using the Same Method - This invention discloses a detection method for an ion migration spectrum which comprises: acquiring an ion migration spectrum of pure carrier gas and an ion migration spectrum of carrier gas containing a test substance sample; and performing differential process on the ion migration spectrum of said pure carrier gas and the ion migration spectrum of the carrier gas containing the test substance sample to acquire a differential spectrum, wherein the value of a characteristic peak of said differential spectrum represents properties of said sample of substances, said method avoids interferences on the migration spectrum from interference sources of the apparatus itself, thereby improving detection sensitivity and accuracy of the ion migration spectrum; and migration spectrum shift caused by variations in the environmental conditions can be found and corrected through the differential process on the migration spectrum of the pure carrier gas, thereby achieving self-stableness and self-correction of the ion migration spectrometer. This invention further discloses an ion migration spectrum detector and an ion migration spectrometer using said method. | 11-12-2009 |
| 20090271068 | Detection Apparatus - A detection apparatus comprises a freely-movable integral framework provided with front wheels and rear wheels, characterized in that, a control portion and a scan portion, and a driving mechanism driving said framework to move are provided on said framework, wherein said framework is provided with a first interface for connecting to external power, so that said detection apparatus is driven by external power via the driving mechanism to perform detection while conducting detection on site, and wherein the semitrailer for mounting the framework is provided with a second interface connectable to a traction apparatus so as to connect the detection apparatus and the traction apparatus while carrying out site-changing transportation. Said detection apparatus is not affected by the alteration of the emission standards, has low failure rate and maintenance cost, has zero emission in the detection state, and is pollution-free. | 10-29-2009 |
| 20090266181 | Hand-Held Swipe Sampling Device - The present invention relates to a hand-held swipe sampling device which can continuously supply sampling swabs. The swipe sampling device comprises a hand-held portion and a swipe sampling portion, wherein the hand grip portion is a rectangular housing in the interior of which contains a continuous sampling swab space, with a bottom cover provided on the underside of the sampling swab space, and a sampling swab outlet provided at an upper end of one side of the sampling swab space; a front end face of the swipe sampling portion configured as an accurate swipe sampling surface and provided with a sampling swab cutter. The sampling device according to the present invention is designed in a manner that continuous folded sampling swabs can be mounted and used in the sampling device such that the device can be used for many times after each mounting of the sampling swabs, thereby simplifying the mounting operations, reducing the contamination opportunities and facilitating the storage of the sampling swabs. | 10-29-2009 |
| 20090252289 | Integrated System and Integrating Method for Radioactive Material Detection and X-ray Radiation Imaging - The present invention relates to the fields of radioactive material detection and X-ray radiation imaging inspection, and provides a system and method for performing radioactive material detection and X-ray radiation imaging inspection simultaneously at the same place, thereby solving the problem that the two means have to be conducted separately, as in the prior art. The integrated system of the invention comprises: an X-ray NII system for performing X-ray radiation imaging inspection on the object under examination; a radiation monitor placed adjacent to the X-ray NII system device to detect the radioactive rays emitted by the object under examination; the radiation monitor sets, within the detection energy region thereof, a lower limit of detection to distinguish the energy region of the detected X-rays emitted by the X-ray detection device from the energy region of the radioactive rays emitted by the object under examination, and detects the energy in the energy region higher than said lower limit of detection. The present invention realizes a compact integration of the two devices, and greatly saves space and time resources. | 10-08-2009 |
| 20090166532 | DRIFT TUBE STRUCTURE FOR ION MOBILITY SPECTROMETER - A drift tube structure for ion mobility spectrometer is disclosed comprising electrode sheets and insulation parts arranged in alternation, with each electrode sheet being a mesh metal sheet having a radian or taper portion which is convexly curved toward an ion input. Further, the radian or taper portion of the electrode sheet has meshes of higher transparency. With the above structure of the present invention, an electric field having a periphery of uniform focusing center can be formed in the migration zone. The circular ring configuration of the electric field periphery can shield the migration electric field from any influence of external electric fields. The electrodes are each meshlike and have a circular hole at the center, thus they can focus and collect as many as possible ions that do not move along the central axis, and those ions moving along the central axis can pass through the electrodes transparently. | 07-02-2009 |
| 20080197293 | DIRECTION CORRECTING APPARATUS, METHOD THEREOF AND MOVABLE RADIATION INSPECTING SYSTEM - The present invention discloses direction correcting apparatus and method thereof for a movable radiation inspecting system having a moving device. The direction correcting apparatus comprises: a direction detecting device for detecting a moving direction of the moving device and generating a detecting signal indicating the moving direction; a direction control device for controlling the moving direction of the moving device; and a control unit for calculating a deviation value between the moving direction and the predetermined direction based on the detected signal received from the direction detecting device, and the direction control device is driven according to the deviation value to correct the moving direction to the predetermined direction. The direction correcting apparatus according to the present invention can automatically control the movable radiation inspecting system to move linearly in a predetermined direction during working, which enhances automatic control degree, and has a simple structure with installing easily and reduced cost. And it also does not influence the normal running of the inspecting system on a road while not inspecting. | 08-21-2008 |
