Patent application number | Description | Published |
20090065698 | CONTROL UNIT AND CONTROL METHOD FOR RADIATION SOURCE AND RADIATION INSPECTION SYSTEM AND METHOD THEREOF - A radiation inspection system is disclosed. The radiation inspection system comprises: an inspection passage through which a moving object under inspection can pass, a radiation source disposed on a side of the inspection passage for emitting radiation, an array of detectors disposed on the other side of the inspection passage opposite to the radiation source for receiving the radiation emitted from the radiation source, a detector for detecting the moving object, and a controller for receiving a signal from the detector and controlling the radiation source to emit radiation when the detector detects the moving object for radiation imaging and inspection of the moving object. According to the radiation inspection system, the controller can control the radiation source to automatically emit radiation beam based on the detection signal from the detector for inspecting the moving object. As a result, inspection efficiency is improved, safety is increased, and misoperation of the radiation source is eliminated. | 03-12-2009 |
20090166539 | MULTICHANNEL ANALYZER AND METHOD FOR REAL-TIME CORRECTION OF PEAK SHIFT - The invention provides a multichannel analyzer for use in a multichannel spectrometer, which comprises a standard spectrum calibrator for obtaining energy calibration parameters of said multichannel spectrometer; an environment background spectrum calibrator for obtaining parameters of a current and a previous environment background spectrum; a peak shift detector for analyzing the parameters of the current and previous environment background spectrum to determine whether a peak shift occurs between them and to determine a correction coefficient of the peak shift; and a parameter corrector for correcting the energy calibration parameters of said multichannel spectrometer using said peak shift correction coefficient. The invention also provides a method for correcting a peak shift of a multichannel spectrometer adapted in the multichannel analyzer. The method for correcting and the multichannel analyzer can correct and monitor the peak shift of the multichannel spectrometer in real time. | 07-02-2009 |
20090166540 | DEVICE AND METHOD FOR DETECTING ORIENTATION OF RADIOACTIVE MATERIAL - Disclosed is a device for detecting orientation of a radioactive material to determine presence and position of the radioactive material, comprising: at least one first radiation detector; at least one second radiation detector, each of said at least one second radiation detector and each of said at least one first radiation detector being arranged side by side and in pairs, detection surfaces of said first and second radiation detector being in the same plane to receive radiation from the same direction in the same manner and to generate a first detection signal and a second detection signal, respectively; a shielding plate, said shielding plate being arranged between said first radiation detector and said second radiation detector arranged in a pair and extending forward beyond said detection surfaces; and a determination device for receiving the first and second detection signals from said first and second radiation detector, and determining whether a radioactive material exists or not according to said first and second detection signals and simultaneously determining the orientation of the radioactive material according to the difference between said first detection signal and said second detection signal. Also disclosed is a method for detecting orientation of a radioactive material. | 07-02-2009 |
20090166542 | RADIATION DETECTION SYSTEM USING A MULTICHANNEL SPECTROMETER AND METHOD THEREOF - A data processing device for processing a reference background spectrum and a measurement spectrum of a radioactive material represented by a multichannel spectrum to acquire energy region information of detected gamma rays is provided, said data processing device comprising: energy region dividing means for degenerating said multichannel spectrum into a degenerated spectrum of limited channels, each degenerated spectrum representing an energy region; degenerated spectrum calculating means for calculating a background degenerated spectrum and measurement degenerated spectrum based on said background spectrum and said measurement spectrum corresponding to said degenerated spectrum of limited channels respectively; energy ratio calculating means for calculating a energy ratio based on the calculated background degenerated spectrum and measurement degenerated spectrum; peak-detection means, for searching a peak value in the calculated energy ratios; energy region determining means for determining a corresponding energy region of said gamma rays based on the searched peak value in the energy ratios. A corresponding radiation detection method and a radiation detection system employing the data processing device are also provided. | 07-02-2009 |
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 |
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 |
20090316136 | METHOD AND SYSTEM FOR IDENTIFYING MOVING OBJECT, AND METHOD AND SYSTEM FOR INSPECTING MOVING OBJECT BY RADIATION IMAGING - Disclosed is a method for identifying a moving object, comprising: a driving-in step of moving a moving object into a passage, a velocity measuring step of measuring a moving velocity of the moving object, a light beam emitting step of emitting light beams from one side of the passage, a light beam receiving step of receiving the light beams not shielded by the moving object at other side of the passage, a profile determining step of determining a profile of at least one portion of the moving object based on the received light beams and the measured moving velocity of the moving object, and an identifying step of determining type of the moving object by comprising the profile of the at least one portion of the moving object with information of moving objects stored previously. The method and the system according to the present invention can adopt corresponding scanning controlling manners for different vehicles, so that inspection information of inspected vehicles is complete, inspection images are of high quality, and radiation dose received by drivers are minimal. | 12-24-2009 |
20100072385 | RADIOACTIVE MATERIAL DETECTING AND IDENTIFYING DEVICE AND METHOD - Disclosed is an device for detecting and identifying a radioactive material, comprising: a first detector including a detection surface and generating first pulse signals when gamma rays are incident onto said detection surface; a second detector generating second pulse signals and provided in the front of the detection surface of the first detector, so that the gamma rays entering the second detector directly enter the first detector after passing through the second detector; and an identification unit. The identification unit comprises: a coincidence device configured to receive the first pulse signals and the second pulse signals from said first detector and said second detector; a multi-channel analyzer configured to receive the second pulse signals from the said second detector, the multi-channel analyzer counting said second pulses and generating the energy spectrum of the gamma rays according to the counted second pulses, when said first pulse signals and said second pulse signals are both valid; and a determination device configured to determine the type of the radioactive material emitting the gamma rays according to the generated energy spectrum and to determine whether a radiation exists or not according to said first pulse signals or said second pulse signals. The present invention also provides a method for detecting and identifying a radioactive material. | 03-25-2010 |
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 |
20140185769 | BACK SCATTERNING INSPECTION SYSTEMS FOR HUMAN BODY - A human body back-scattering inspection system is disclosed. The system comprises a flying-spot forming unit configured to output beams of X-rays, a plurality of discrete detectors which are arranged vertically along a human body to be inspected, and a controlling unit coupled to the flying-spot forming unit and the plurality of detectors, and configured to generate a control signal to control the flying-spot forming unit and the plurality of detectors to perform a partition synchronous scan on the human body to be inspected vertically. The present disclosure utilizes the geometry property of the human body back-scattering inspection system, and proposes a multiple-point synchronous scan mechanism which largely accelerates the inspection of human body. | 07-03-2014 |
20140185770 | BACK-SCATTERING INSPECTION SYSTEMS AND METHODS FOR HUMAN BODY - Human body back-scattering inspection systems and methods are disclosed. In the invention, X-rays modulated by the flying-spot forming unit having spirally distributed flying-spots have a distribution having alternating peaks and valleys on the irradiated surface. In this way, scanning starting times can be precisely controlled to cause two devices to have scanning starting times that are different by a half of a cycle. That is, the beams outputted from one device are at maximum when the beams outputted from the other device are at minimum. In other words, even if the ray source of one device emits rays, it will not significantly affect imaging result of the other device. In such way, the two devices may emit rays and perform scanning at the same time, and thus the total scanning time is reduced. | 07-03-2014 |
20140185773 | HUMAN BODY SECURITY INSPECTION SYSTEM - A human body security inspection system including a plurality of ray emitting-detecting modules, which are configured to emit X-rays to the object to be inspected and to receive X-rays scattered from the object to be inspected, wherein the ray emitting-detecting modules form an enclosed region with respect to the object to be inspected and security inspection is implemented on the object in the enclosed region. | 07-03-2014 |
20140361187 | DETECTOR AND METHOD FOR SIMULTANEOUSLY DETECTING GAMMA RAY AND NEUTRON RAY USING SAME - The present invention discloses a detector. The detector includes a detector crystal, configured to detect incident rays therein; a plurality of moderator layers, configured to moderate neutrons entering the moderator layer; and a plurality of converter layers, configured to react with said moderated neutrons. The moderator layers and the converter layers are overlapped with each other, and the moderator layers and the converter layers are located outside the detector crystal. | 12-11-2014 |
20150025841 | METHOD AND DEVICE FOR PATROL INSPECTING AND POSITIONING A RADIOACTIVE SUBSTANCE - A method for patrol inspecting and locating a radioactive substance, comprising: providing a background radioactive intensity value of environment; collecting radioactive intensity values from a inspecting region by a detector at a plurality of sampling points on a patrol inspection route; calculating a radioactive intensity distribution in the inspecting region on basis of the collected radioactive intensity values and the background radioactive intensity value; and determining a position of the radioactive substance on basis of the radioactive intensity distribution. Furthermore, a device for patrol inspecting and locating a radioactive substance comprises: two or more detectors configured to collect radioactive intensity values from a inspecting region around a patrol inspection route, at each of a plurality of sampling points on the patrol inspection route; and a movable carrier configured to carry the detector and to move along the patrol inspection is route to pass by the sampling points. The method and device can obtain the position and the radioactive intensity distribution of the radioactive substance within the inspecting region on basis of the multiple-point observation on the patrol inspection route. | 01-22-2015 |
20150030205 | HUMAN BODY SECURITY INSPECTION METHOD AND SYSTEM - The present invention provides a human body security inspection method and system. The method comprises: retrieving in real-time scanning row or column image data of a personal to be inspected; transmitting in real-time the image data to an algorithm processing module and processing these image data by the module; automatically recognizing a suspicious matter by a suspicious matter automatic target recognition technique, after retrieving an image data of an entire scanning image of the personal; any of the following three inspection modes is selected, so as to perform a further processing on basis of the recognition result of the suspicious matter, (1) in a manner of automatic target recognition technique, (2) in a combination manner of the automatic target recognition technique and a privacy protection image; and (3) a combination manner of the automatic target recognition technique, a privacy protection image and human intervention. | 01-29-2015 |