The embodiment of the application discloses a compound detection device. The compound detection device comprises a detecting unit, a signal processing unit and an imaging unit; the detecting unit comprises a plastic scintillator, an inorganic scintillation crystal array and a photoelectric converter array in sequence; the plastic scintillator is used for receiving a radioactive ray sent by a target sample and generating a corresponding first visible light signal; the inorganic scintillation crystal array is used for receiving the radioactive ray sent by a target sample and generating a corresponding second visible light signal; the photoelectric converter array is used for separately converting the first visible light signal and the second visible light signal into a first electrical signal and a second electrical signal; the signal processing unit is used for processing the first electrical signal and the second electrical signal to determine the type of the radioactive ray; and, theimaging unit is used for imaging the target sample according to the signal processing result of the signal processing unit. By adoption of compound detection device provided by the embodiment of the application, the beta ray and the high-energy gamma ray can be detected at the same time.

Compound detection device

A wireless power transfer system ( 1 ) includes a primary coil ( 2 ) for generating an oscillating electromagnetic field for wirelessly transferring power to a secondary coil. The system also includes emitting coils ( 6 ) arranged to generate an electromagnetic field for exciting a nuclear quadrupole resonance in the biological material of an animal ( 7 ) exposed to the electromagnetic field generated by the emitting coils. The system also includes detecting coils ( 6 ) for detecting the absorption and/or emission of electromagnetic radiation by and/or from the excitation of the nuclear quadrupole resonance. The system is arranged, when the detecting coils detect the absorption or emission of electromagnetic radiation, to prevent the primary coil from generating, or to cause the primary coil to reduce the amplitude of, the oscillating electromagnetic field.

Wireless power transfer system

The present invention relates to an RF coil system for nuclear quadrupole resonance detection. The system comprises a transmitting coil, a receiving coil, a matching circuit and a coil frame. The transmitting coil is formed by transmitting coil units, and a Helmholtz coil is formed by each two adjacent transmitting coil units. The receiving coil is formed by receiving coil units, and an even number of the receiving coil units are arranged between each two transmitting coil units, and the receiving coil units between two transmitting coil units are symmetrically placed relative to the symmetrical center planes of the two transmitting coil units are in reverse connection to eliminate the coupling between the transmitting coil and the receiving coil. The transmitting coil, the receiving coil and the matching circuit are fixed on the coil frame. The distance between the receiving coil units is determined according to the time of detecting a sample to be detected for one time and a conveying belt speed, and the time that the conveying belt passes the receiving coil is the time needed in the detection of a mail for one time. According to the system, the device can sensitively and accurately detect an article.

RF coil system for nuclear quadrupole resonance detection

The invention provides a detector for positive electron emission imaging equipment, and positive electron emission imaging equipment. The detector is provided with an upper end surface and a lower endsurface, and includes multiple layers of detector modules arranged in a height direction up and down, wherein each layer of detector module includes a layer of scintillation crystal module and a layer of photosensor array which is coupled by a plurality of photosensors in the length and width directions; the scintillation crystal module is a scintillation crystal array coupled by a plurality of scintillation crystals in the length and width directions; the photosensor array is coupled to a lower end surface of the scintillation crystal module for detecting visible photons which are generatedduring the reaction process of light gamma photons and the scintillation crystal module; a layer of photosensor array is arranged between every two layers of scintillation crystal arrays in the multiple layers of detector modules arranged up and down; a scintillation crystal array is arranged between every two layers of photosensor arrays; and the gamma photons enters from the upper end surface, and the upper end surface is the upper surface of the scintillation crystal module located at the uppermost layer. The detector for positive electron emission imaging equipment has the advantages of high positioning capability for gamma photons, high time resolution, high sensitivity, and high spatial resolution.

Detector for positive electron emission imaging equipment, and positive electron emission imaging equipment

The invention relates to a channel-type parcel security inspection machine based on nuclear quadrupole moment resonance technology. The security inspection machine comprises an electronic component, a transmission component, a structural framework, an excitation and receiving coil assembly, a shielding assembly and an alarm component. The shielding assembly comprises an electronic shielding body and a double-layer shielding body. The double-layer shielding body comprises an inner-layer shielding cover and an outer-layer shielding housing. The outer-layer shielding housing is formed by a machine housing, a roller wrapping head, and an outer-layer conductive rubber curtain. The inner-layer shielding cover is formed by a metal cover, an elastic conductive spring sheet and an inner-layer conductive rubber curtain. The electronic shielding body shields the electronic component, and each surface thereof is provided with radiating holes. The omnibearing shielding of the channel-type inspection device is realized based on the nuclear quadrupole moment resonance technology, and the channel-type parcel security inspection machine provides good foundation for realizing good detection index of the nuclear quadrupole moment resonance technology.

Channel-type parcel security inspection machine based on nuclear quadrupole moment resonance technology

The invention discloses a novel high-spatial-resolution PET detector module, and the module comprises a plurality of scintillators, wherein the two surfaces of each scintillator are provided with light guide layers in a pasted manner, the scintillators are overlapped together to form a layered structure, the height of the layered structure is not less than 30mm, and the thickness of each scintillator does not exceed 5mm. Two surfaces of each scintillator are correspondingly provided with one X-axis fiber layer and one Y-axis fiber layer in an attached manner. At least one end of each X-axis fiber layer is coupled to one linear array SiPM, at least one end of each Y-axis fiber layer is coupled to one linear array SiPM, and each linear array SiPM is connected with one reading circuit. The reading circuits corresponding to the scintillators read the position information and amplitude information of the scintillating events of the corresponding scintillators on the X-axis and Y-axis. The scintillating depth of gamma photons in the scintillators of the layered structure is calculated through the amplitude proportion of the X-axis signal sum to the Y-axis signal sum of the scintillatingevents of all scintillators in the layered structure.

Novel high-spatial-resolution PET detector module

The utility model relates to a planar weak coupling antenna applied to a nuclear quadrupole moment resonance detection system The planar weak coupling antenna comprises an emission antenna and a reception antenna The emission antenna and the reception antenna are arranged in order from outside to inside The emission antenna and the reception antenna are located in the same plane Mutual inductance between the emission antenna and the reception antenna is 0-10% of self-inductance of the reception antenna The reception antenna comprises a first reception antenna and a second reception antenna connected with the first reception antenna The first reception antenna and the second reception antenna are formed by wires through winding The wire winding direction of the first reception antenna is opposite to the wire winding direction of the second reception antenna Through design of the reception antenna and the emission antenna, a nuclear quadrupole moment resonance detection system equipped with the planar weak coupling antenna can work stable without electromagnetic shielding, space stray electromagnetic waves can be inhibited effectively, and a signal to noise ratio of an NQR signal is improved

Planar weak coupling antenna applied to nuclear quadrupole moment resonance detection system

The invention belongs to the field of gamma detectors and particularly relates to a novel gamma detector read-out module. The novel gamma detector read-out module comprises a scintillator, a one-dimensional optical fiber layer, two linear arrays SiPM and two high-time-solution application-specific integrated circuits ASIC, wherein a light guide layer is attached to the surface of the scintillator;the one-dimensional optical fiber layer is attached to the surface of the scintillator with the light guide layer, the two linear arrays SiPM are coupled to two ends of the optical fiber layer in a one-to-one correspondence manner and are connected with the two application-specific integrated circuits ASIC in a one-to-one correspondence manner; and two dimension position signals of a scintillating event are obtained by virtue of the two application-specific integrated circuits ASIC. According to another technical manner, the two high-time-solution application-specific integrated circuits ASICare replaced with two gravity center read-out circuits, and the two dimension position signals of the scintillating event can be obtained by virtue of the two gravity center read-out circuits. According to the novel gamma detector read-out module, the cost of a gamma detector is lowered.

Novel gamma detector read-out module

The invention relates to the camera imaging field and especially relates to a gamma-photon detector. The detector comprises a plurality of SiPM, a scintillator and a two-dimensional optical fiber layer, wherein photoconductive layers are attached to two surfaces of the scintillator. The two-dimensional optical fiber layer comprises two or more optical fiber layers. Two dimensions of the optical fiber layers of the two-dimensional optical fiber layer are separated and are flatly laid on two surfaces of the scintillator. Or the two dimensions of the optical fiber layers are mutually attached toany one surface of the scintillator. One end of each of the two dimensions of the optical fiber layers is coupled to the photoconductive layers of the contacted scintillator, and the other end is coupled to the SiPM of a linear array. The other SiPM is attached to a side surface of the scintillator so as to provide a trigger signal of photon counting. The detector has advantages of increasing a spatial resolution of the gamma detector and reducing camera cost.

Novel gamma-photon high spatial resolution detection device

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