Abstract: A trace detector is disclosed. The trace detector comprises: a desorption chamber defining a desorption region, and the desorption chamber has a housing. The housing has a sample feeding port for introducing a substance to be detected into the desorption chamber and a gas discharge port for discharging gas entraining the sample from the desorption chamber. A controller is used for controlling the trace detector in such a manner that the sample feeding port and the gas discharge port are in fluid communication with the desorption chamber during pre-concentration process of the trace detector, thereby continuously feeding and collecting the sample. With the above manner, data collecting, processing and analyzing processes may be performed by the trace detector throughout the sample feeding process and the gas pre-concentrating process.

Abstract: 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 c

Abstract: Electrostatic discharge (ESD) protection circuit including a first silicon controlled rectifier (SCR) and a trigger circuit; the trigger circuit including a first MOS transistor and a second transistor, triggering the first SCR and providing a second SCR shunt with the first SCR during ESD.

Abstract: 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.

Abstract: An electronic device enclosure includes a main enclosure, a cable holding device received in the main enclosure, and a cable which held by the cable holding device in different orientations. A first positioning slot and a second positioning slot are defined in the cable holding device. The cable is guided out of the cable holding device in one or more predetermined directions.

Abstract: 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 fi

Abstract: Disclosed is an ion mobility spectrometer (IMS) detection method using dopants. The ion mobility spectrometer comprises a sample feeding device, a drift tube and a gas passage system communicated therewith. The gas passage system comprises a pump, a filtering device, a gas inlet and a gas outlet provided on the drift tube for providing clean gas used as the drift gas and the sample carrier gas. The detection method comprises: providing a sampling substrate for sample collection; combining the dopants with the sampling substrate; collecting the sample using the sampling substrate combined with the dopants; and introducing the sampling substrate that has collected the sample into the sample feeding port of the ion mobility spectrometer for detection. With this method, it is unnecessary to provide an independent dopant gas passage, thereby simplifying the structure of the instrument and meanwhile, making it easier and more accurate to control the amount of the dopants required for detection.

Abstract: An electronic device includes a computer, a backboard, a circuit board attached to the backboard, and a supporting base attached to the top surface of the circuit board. The computer case includes a bottom plate. The backboard is attached to the bottom plate. The backboard and the supporting base engage with the circuit board, and the backboard is located between the bottom plate and the circuit board, to prevent the circuit board from contacting the bottom plate.

Abstract: Disclosed is an ion source comprising a plate-shaped source body which has radioactivity on its both sides and allows positive and negative ions to penetrate through the source body. The present invention gives beneficial effects. First, the ion source structure can improve the ionization efficiency of sample molecules, and the generated sample ions have a centralized distribution within a flat space on both sides of the source body. Such distribution of ion cloud facilitates to improve the IMS sensitivity. Meanwhile, the source body of the present invention has a transmittance in itself. Thus, positive and negative ions generated on both sides of the source body can penetrate through the source body and be separated to the both sides of the source body. In this way, it is possible to improve the utilization efficiency of ions.

Abstract: 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 c

Abstract: 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.

Abstract: The present invention provides a method and system of material identification using binocular steroscopic and multi-energy transmission image. With the method, any obstacle that dominates the ray absorption can be peeled off from the objects that overlap in the direction of a ray beam. The object that is unobvious due to a relatively small amount of ray absorption will thus stand out, and the material property of the object, such as organic, mixture, metal and the like can be identified. This method lays a fundament for automatic identification of harmful objects, such as explosive, drugs, etc., concealed in a freight container.

Abstract: A hand-held sampling apparatus used for an ion mobility spectrometer and method of obtaining a sample are provided to prevent deformation of sampling wipes when detecting explosives and drugs. The apparatus has a body comprising a handle in the rear portion and a wiping sampling mechanism in the front portion, with a wiping surface located on its underside. The sampling wipe can be in full contact with the surface of the object during wiping to improve wiping efficiency. Correspondingly, a smaller sample inlet port can be disposed on the analyzer so as to save a large amount of sampling wipes. and meanwhile avoid sampling wipes from deformation and folds hard to restore, thereby ensuring subsequent sample insertion operation, enhancing the efficiency of both sample collection and sample injection and improving the detection performance for the analytes to be detected.

Abstract: A security inspection door comprising a narcotic drug/explosive detecting subsystem, a radioactive substance detecting subsystem and a metal detecting subsystem which are provided in a tank body is disclosed, wherein electromagnetic radiation shields are respectively provided around the three detecting subsystems, so that they are isolated from one another and are not interfered with one another. The three detecting subsystems are combined together to form a novel security inspection door, so the narcotic drugs/the explosives, the radioactive substances and the dangerous metal articles can be detected at the same time. Further, electromagnetic radiation shields are respectively provided around the three detecting subsystems, so that the three detecting subsystems are isolated from one another and are not interfered with one another, and thus, the inspection reliability and the inspection accuracy are improved.

Abstract: An arm-folding mechanism for use in a vehicle-mounted radiation imaging system. The vehicle includes a vehicle body behind a driving cab. The vehicle body includes a generator cabin and a control cabin. The arm-folding mechanism includes a vertical detection arm, a main arm frame, and a hinged mechanism hingedly connecting the vertical detection arm with the main arm frame. The hinged mechanism includes: a first connection arrangement having a free end and a fixed end fixedly connected with or integral with the main arm frame; a second connection arrangement fixedly connected with the vertical detection arm; and an intermediate arrangement connecting the first connection arrangement with the second connection arrangement so that the vertical detection arm can rotate relative to the main arm frame. The bottom of the first connection arrangement is at the same level as or above the bottom of the main arm frame.

Abstract: Thermal responsive compositions for treating bone diseases are provided. The thermal responsive composition for treating bone diseases includes a bone growth factor and a biodegradable copolymer. The biodegradable copolymer has a structure of Formula (I) or Formula (II): A-B-BOX-B-A??(Formula I) and B-A-B-(BOX-B-A-B)n-BOX-B-A-B??Formula (II), wherein, A includes a hydrophilic polyethylene glycol polymer, B includes a hydrophobic polyester polymer, BOX is a bifunctional group monomer of 2,2?-Bis(2-oxazoline) and used for coupling the blocks A-B or B-A-B, and n is an integer and the same or more than 0.

Abstract: In a device for detecting and identifying a radioactive material, a coincidence device is configured to receive the first pulse signals and the second pulse signals from a first second detectors; a multi-channel analyzer is configured to receive the second pulse signals, count said second pulses and generate the energy spectrum of the gamma rays according to the counted second pulses, when the first pulse signals and the second pulse signals are both valid; a linear gate is configured to receive coincidence signals and being turned on, when the output signals of the coincidence device are valid, to allow the multi-channel analyzer to count the second pulses; and a determination device is configured to determine the type of the radioactive material emitting the gamma rays according to the generated energy spectrum and determine whether a radiation exists or not.

Abstract: An array-based ion storage system includes an ion generation section, and an ion storage section having a first end electrode coupled to the ion generation section and having multiple holes, a second end electrode having multiple holes, an intermediate electrode having multiple holes, a first insulator formed as a ring between the first end electrode and the intermediate electrode, and a second insulator formed as a ring between the intermediate electrode and the second end electrode. The ion storage section can be made thinner to facilitate consistency in ion extraction and reduce the spread of an ion mobility spectrum peak. The insulators have a big hole, and the ions cannot bump onto the insulation material during ion vibration or thermal movement in the storage space. Therefore, charge transfer and accumulation at the insulator and the subsequent discharge will not occur, suppressing instability of storage and loss of ions.

Abstract: Disclosed is an ion mobility spectrometer (IMS) detection method using dopants. The ion mobility spectrometer comprises a sample feeding device, a drift tube and a gas passage system communicated therewith. The gas passage system comprises a pump, a filtering device, a gas inlet and a gas outlet provided on the drift tube for providing clean gas used as the drift gas and the sample carrier gas. The detection method comprises: providing a sampling substrate for sample collection; combining the dopants with the sampling substrate; collecting the sample using the sampling substrate combined with the dopants; and introducing the sampling substrate that has collected the sample into the sample feeding port of the ion mobility spectrometer for detection. With this method, it is unnecessary to provide an independent dopant gas passage, thereby simplifying the structure of the instrument and meanwhile, making it easier and more accurate to control the amount of the dopants required for detection.

Abstract: The present invention discloses a sampling component comprising a sampling body that can be electrically heated and the outer surface of which has a wiping sampling area; and an insulated handle that is connected with one longitudinal end of the sampling body. The sampling component according to the present invention contacts directly the contacts of an external power supply after being disposed in a analysis chamber, the power supply is turned on to heat the sampling body so as to realize sample pyrolysis, and the power is turned off immediately after the sampling component is taken away. Thus, the power supply of the sampler can work discontinuously so that the power consumption of the system is reduced, meanwhile, the system malfunction caused by a long-term work of the sampling device under a high temperature can be avoided. The present invention further discloses a sampling device having said sampling component and an ion mobility spectrometer having the sampling device.