105results about How to "Fast time response" patented technology

The invention discloses a multi-layer scintillation detector and a measurement method for high-energy proton and neutron energy spectrum measurement. The sensitive volume of the detector is formed by wrapping a scintillant with another scintillant; an interlayer is arranged between the inner layer scintillant and the outer layer scintillant; two photomultipliers are arranged on the two sides of the scintillants, and correspond to the two scintillants respectively; the interlayer is provided with a window in a position corresponding to the inner layer photomultiplier; the scintillants are pressure-welded and fixed by a housing; and the photomultipliers are fixed on the housing by photomultiplier bases. The detector can be used for the high-energy proton and neutron energy spectrum measurement under a charged particle, neutron and gamma ray complicated mixing field.

It is a positron annihilation lifetime spectroscopy measurement spectrometer, which is characteristic of the positron annihilation lifetime spectroscopy using lanthanum chloride crystals as the scintillator detector. The lanthanum chloride crystals not only have fast response time, but also have more superior energy resolution than the BaF2 crystals. Therefore, it can use the energy window to select circuit, and restrict the signals from the start and stop road detectors in a very narrow energy range, and it can effectively exclude the effect of gamma radiation on the measurement process of other sources (sample materials, environment, etc.), greatly reducing the lifetime spectrum ending, and it enables the spectrometer detector to maintain fast response time, and meanwhile has better energy resolution, which can process the positron annihilation lifetime spectroscopy measurement under the strong gamma-ray interfere, in order to extract positron annihilation lifetime spectroscopy effective information.

The invention provides a vacuum ultraviolet spectroscopy detecting device, which belongs to the field of spectrum analysis. The device includes: an entrance slit (2), a concave grating (3), a optical fiber array (4) and a flat plate detector (5). The entrance slit (2) and concave grating (3) are fixed in the vacuum cavity (1), one head face of the optical fiber array (4) coincides with the Rowland circle determined by the entrance slit (2) and the concave grating (3). The head face of the optical fiber array (4) is painted with fluorescent substance which can transform vacuum ultraviolet light into visible light, the other end face bifurcates into a number of sub-optical fiber arrays, and the end face of the sub-optical fiber array is a plain face and is connected with one flat plate detector (5). The device can measure vacuum ultraviolet spectroscopy within a certain range of wavelength simultaneously, and achieve the optical spectrum and pixel resolution of glancing incidence grating vacuum ultraviolet spectrometer, the testing time responses well and the device has high sensitivity; the moveable component is not needed in the vacuum cavity, and the structure is simple and reliable.

With two time sprays controls straight spurts executes the gasoline engine to reduce fire burning the method, this method through carries on in the cylinder two time fuel injection, forms the thick thin different lamination mixture air, first causes rich mixture kcarburettork the spontaneous combustion fire. Adjusts the time and the proportion which two time blows may control the lamination carburetion the time and the density, thus may adjust and control the HCCI burning the fire time and the reduction catches fire; At the same time, because has formed district order burning, thus may control, accurate. Indicated on the real engine experiment that, this method may enhance gasoline engine HCCI the burning stability, example NOx discharges is 0~230ppm, the comparatively same compound under gasoline engine reduces NOx to discharge above 95%, the non- carbon smoke discharges, the fuel oil consumption rate achieves the diesel engine level.

The invention relates to a method immunoassay by utilizing zinc oxide quantum dots. Horse radish peroxidase is assembled on an upper layer of quantum dots and then an antibody is assembled on an outer layer. Meanwhile, a zinc oxide nanometer rod grows on a golden electrode, andan antibody is also assembled on the zinc oxide nanometer rod. An antigen to be measured and the antibody on the quantum dots are combined with the antibody on the zinc oxide nanometer rod through specific combination of the antibody and the antigen, a very small amount of antigens is used for connecting the quantum dots assembled with a large amount of horse radish peroxidase to the golden electrode of the zinc oxide nanometer rod, electrochemical response of catalytic action of the horse radish peroxidase to peroxide is detected, and then the relationship of antigen concentration and electrochemical signals of catalytic action of the horse radish peroxidase to peroxide is established. The detection method makes antigen with very low concentration generate obvious electrochemical catalytic signals, and plays a role of signal amplification. The invention has important implications in the aspects of early detection of diseases in medical field.

The invention discloses an online control method for the finish rolling temperature of precision rolling strip steel and belongs to the field of temperature control of rolling processes. The second flow regulating variable or the cooling water flow regulating variable between machine frames is subjected to online optimization through a quadratic programming optimization algorithm, and the deviation between a calculated value and a target value of the finish rolling temperature is reduced. The method comprises the steps that a plurality of control points are generated on the strip steel in the length direction according to a control period; the deviation between the calculated value and the measured value of the finish rolling temperature of all the control points is calculated according to information of all the control points and the measured value of a pyrometer at a precision rolling outlet; a temperature calculating model is corrected according to the deviation, and the calculation precision is improved, at the same time, the deviation between the calculated value and the target value of the finish rolling temperature of all the control points is calculated; and according to the deviation value between the temperature calculated value and the target value, the second flow regulating variable or the cooling water flow regulating variable between the machine frames of all the control points is subjected to online optimization through the quadratic programming optimization algorithm, and the finish rolling temperatures of all the control points are made to meet the control requirements. By means of the method, the control precision of the finish rolling temperature of the strip steel is improved, the uniformity of the total-length temperature of the strip steel is guaranteed, and the finished product quality requirements are met.

The invention relates to a gas scintillation based fission neutron detector. The detector comprises a detector barrel, an entrance window hermetically arranged at the front end face of the detector barrel, an exit window hermetically arranged at the rear end face of the detector barrel, two quartz windows arranged at two lateral surfaces of the detector barrel, at least two target stands fixed in the detector barrel, fission targets suspended on the corresponding target stands, two photoelectric detectors arranged outside the two quartz windows respectively, a charging tool communicated with the detector barrel, and scintillation gas filled in a barrel core; and the scintillation gas adopts inert gas or nitrogen. The gas scintillation based fission neutron detector solves the technical problems of low neutron / gamma resolving power and low neutron sensitivity in the conventional neutron detector, and has the advantages of smooth fast neutron energy response and quick time response.

The invention relates to a satellite-borne pulsar X-ray spectrometer which comprises a combined X-ray capillary optical lens and an X-ray energy detector, wherein the combined X-ray capillary optical lens is used for converging X-rays which income in parallel or nearly in parallel to a focus of the lens. The combined X-ray capillary optical lens is composed of a plurality of capillary optical lenses. The X-ray energy detector is used for converting an X-ray light signal to an electric signal and is installed at a position of the focus of the combined X-ray capillary optical lens. The surface of the X-ray energy detector is perpendicular to an optical axis of the combined X-ray capillary optical lens.

The invention relates to a hypersonic PLIF (Plane Laser Induced Fluorescence) wind tunnel experiment method based on acetone tracer. A hypersonic PLIF imaging diagnosis system based on acetone tracerincludes a laser source system, a sheet-shaped light beam shaping system, a PLIF image detection system and an acetone tracer supply system, and is characterized by taking the acetone as tracing particles, performing particle emission in the vacuum environment of a conventional hypersonic wind tunnel, obtaining a fluorescence signal of the acetone in the hypersonic flow field, applying the PLIF measurement technique to obtain a two-dimensional image of the hypersonic flow field.

The invention discloses a photonic crystal T-shaped waveguide-based right-angle output magneto-optical modulator which comprises a photonic crystal T-shaped waveguide with a TE forbidden band. The modulator further comprises an input end (1), two output ends (2, 3), a background silicon dielectric cylinder (4), isosceles right triangle defect dielectric cylinders (5), a defect dielectric cylinder (6), an electromagnet (7) for supplying an offset magnetic field, a modulation power supply (9) and a modulating signal (10), wherein the input end (1) is arranged at the left end of the photonic crystal T-shaped waveguide; the output ends (2, 3) are respectively located at the right end and upper end of the photonic crystal T-shaped waveguide; the defect dielectric cylinder (6) is located at a central interaction of the T-shaped waveguide; four isosceles right triangle defect dielectric cylinders (5) are respectively located at the four corners of the interaction of the T-shaped waveguide; the photonic crystal T-shaped waveguide is used for inputting the TE carrier light through the port (1) and then outputting the amplitude modulating light from the port (3). The invention provides a right-angle output magneto-optical modulator capable of efficiently realizing the photonic crystal T-shaped waveguide.

The invention discloses a portable infrared thermometer for continuous monitoring and a temperature compensation method thereof. The portable infrared thermometer for continuous monitoring comprises two parts: a hardware structure and a temperature compensation algorithm. The hardware structure comprises two infrared sensors that are in near-far staggered placement relative to a thermometer main body, a master control circuit, a power module, a bluetooth transmission unit and other accessories. The longitudinal distance difference between the two infrared sensors is 2mm-8mm, and the distance between the left and the right is 5mm-15mm. The temperature compensation algorithm is mainly directed at the error caused by measuring distance, and determines a temperature correction value according to the measured value of the infrared sensors and the difference of two fore-and-aft staggered sensors. The portable infrared thermometer for continuous monitoring provided by the invention has the function of non-contact continuous measurement of human body temperature, by means of unique two-sensor staggered arrangement and corresponding algorithm correction, the error between the obtained temperature and actual temperature is less than 0.1DEG C, thus meeting the demand of medical temperature measurement. At the same time, the portable infrared thermometer for continuous monitoring also has the advantages of portability and small size, fast temperature measurement, continuous monitoring, and simple structure, etc.

The invention relates to a fault diagnosis method based on CNN and RNN fusion. The method can be used for ship real-time fault diagnosis. The method comprises the following steps: firstly, establishing a correlation matrix between ship characteristic parameters by utilizing historical ship data; the correlation matrix can represent the relationship between attributes; then adding multi-sensor original data in a sliding window acquisition window for correlation processing, taking the processed multivariable time sequence as the input of a convolutional neural network, automatically extracting fault features by the convolutional neural network, and finally, recombining the extracted feature vectors as the input of a recurrent neural network for fault classification. Experimental results showthat the method does not need to manually extract data features, and is high in fault diagnosis accuracy and short in response time. The advancement of the method is mainly reflected in that the method has a good effect in ship fault diagnosis and classification, is quick in time response, and can meet the use requirements of ship fault real-time diagnosis.

The invention discloses a large-scale sparse array antenna efficient comprehensive method based on adaptive probability learning, and solves the problems of poor radiation characteristics and low efficiency caused by poor gradient density distribution of antenna units in an array aperture and high side lobe of a directional diagram in large-scale array antenna sparse array synthesis. According tothe method, the layout of a sparse array is combined with selection probability estimation of antenna units, an array comprehensive problem is combined with optimization of an adaptive probability learning model, and the method comprises the implementation steps of randomly initializing antenna array element distribution, and constructing an initial probability estimation model; rapidly calculating a far-field directional diagram through the excitation coefficient by means of fast Fourier transform; generating a new solution to participate in competition according to the probability model based on a probability learning strategy; adjusting a far-field directional diagram; array element excitation is obtained through fast Fourier transform, and updating the probability model. When the target function requirement is met or the maximum iteration frequency is reached, the optimal sparse array scheme is output, and the comprehensive problem of the large sparse array antenna is solved.

This invention discloses one kind of area array radiation imagery installment which belongs to the radiation imagery survey technology scope, including two-dimensional radiation detector area array, two-dimensional radiation detector necessary electronic installment and empirical data gain system, gamma radiant installment, empirical data processing and picture reconstruction and display system, radiant and detector system relative position control and shifter apparatus. It has big effective survey area, short detecting time, and the detector dead time is short. It may withstand the high-frequency ray radiation, thus greatly reduces the scanning and the imagery time, enhance the system working efficiency. It also has characteristics of low cost, stable performance and convenient maintenance.

The invention discloses a fiber grating wavelength demodulating device based on a saturable absorption fiber. The device comprises a pumping source, a gain fiber, the saturable absorption fiber, a circulator, an annular cavity or linear cavity fiber laser formed by a fiber grating to be measured and a photoelectric detection system used for measuring the repetition frequency of lasers. By measuring the repetition frequency of the lasers, wavelength changes of the fiber grating to be measured are obtained through calculation, and wavelength demodulation is achieved. The fiber grating wavelength demodulating device based on the saturable absorption fiber avoids using spectral analysis equipment and thus lowers the wavelength demodulation cost. Meanwhile, an all-fiber demodulating system is obtained, the demodulating system is made to be small in size, easy to maintain and easy and convenient to use.

The invention relates to the field of environmental quality detection, in particular to a laser-induced fluorescence-based multichannel nitric oxide on-line monitoring system. The nitric oxide on-line monitoring system monitors the concentration of nitric oxide in the atmosphere on line through a TD-LIF (Thermal Decomposition Laser-Induced Fluorescence instrument); NO2 generated by decomposition of different nitric oxide components (NOy) at different temperatures can be directly detected at 532 nm through an LIF spectrum. The monitoring system disclosed by the invention is high in sensitivity, quick in time response and low in interference, is precise and stable, and has an important significance for the technical field of nitric oxide measurement.

The invention relates to a working method of an optical path switching interface mechanism for an optical fiber channel test of a relay protection device. According to the optical path switching interface mechanism, the power source end of a control module is connected with a control power source, the input end of the control module is connected with a button change-over switch, and the output end of the control module is connected with a driver module; an optical path switching module comprises two optomagnetic switches, four transmitting optical fiber interfaces and four receiving optical fiber interfaces, wherein the output end of the driver module is connected with the control ends of the two optomagnetic switches, and the input ends and the output ends of the two optomagnetic switches are connected with the corresponding transmitting optical fiber interfaces and the corresponding receiving optical fiber interfaces. The control module provides a control signal corresponding to the connected optical path switching module, a test instrument can be connected with the relay protection device or an optical power meter or an optical attenuator through the optical path switching interface mechanism, then the driver module drives the optical path switching module to carry out optical path switching of the interfaces, and therefore the normal running state and the testing state of a protection test and the optical fiber channel test can be achieved.

The invention discloses a photonic crystal T-shaped waveguide-based horizontal output magneto-optical modulator which comprises a photonic crystal T-shaped waveguide with a TE forbidden band. The modulator further comprises an input end (1), two output ends (2, 3), a background silicon dielectric cylinder (4), isosceles right triangle defect dielectric cylinders (5), a defect dielectric cylinder (6), an electromagnet (7) for supplying offset magnetic field, a modulation power supply (9) and a modulating signal (10), wherein the input end (1) is arranged at the left end of the photonic crystal T-shaped waveguide; the output ends (2, 3) are respectively located at the right end and upper end of the photonic crystal T-shaped waveguide and are arranged in a horizontal line; the defect dielectric cylinder (6) is located at a central interaction of the T-shaped waveguide; four isosceles right triangle defect dielectric cylinders (5) are respectively located at the four corners of the interaction of the T-shaped waveguide; the photonic crystal T-shaped waveguide is used for inputting the TE carrier light through the port (1) and then outputting the amplitude modulating light from the port (2). According to the invention, the TE carrier optical wave signal modulator can be efficiently realized.

The invention discloses a right-angle output double-way inverted optical clock signal generator with a photonic crystal T-type waveguide. The optical clock signal generator comprises the photonic crystal T-type waveguide with a TE forbidden band and further comprises one input end (1), two output ends (2 and 3), background silicon dielectric cylinders (4), isosceles right triangle defect dielectric cylinders (5), a defect dielectric cylinder (6), an electromagnet (7) providing a bias magnetic field and a rectangular wave current source (9). The left end of the photonic crystal T-type waveguide is the input end (1), the output ends (2 and 3) are located at the right end and the upper end of the photonic crystal T-type waveguide respectively, the defect dielectric cylinder (6) is located in the center intersection position of the T-type waveguide, and the four isosceles right triangle defect dielectric cylinders (5) are located at the four intersecting corners of the T-type waveguide respectively; TE carrier wave light is input through the port (1) of the photonic crystal T-type waveguide, and two ways of optical clock signals opposite in phase are output from the ports (2 and 3). The TE light double-way inverted optical clock signal generator can be obtained efficiently.

The invention relates to an optical path switching interface mechanism for a fiber channel test of a relay protection device. The power end of a control module is connected with a control power supply; the input end of the control module is connected with a button switching switch, and the output end is connected with a drive module; an optical path switching module comprises at least two photomagnetic switches and more than four optical fiber transmitting interfaces and optical fiber receiving interfaces; the output end of the drive module is respectively connected with the control ends of two photomagnetic switches; two input ends of the first photomagnetic switch K1 are respectively connected with the first optical fiber transmitting interface TX1 and the third optical fiber transmitting interface TX3, and two output ends are respectively connected with the second optical fiber transmitting interface TX2 and the fourth optical fiber transmitting interface TX4; two input ends of the second photomagnetic switch K2 are respectively connected with the second optical fiber receiving interface RX2 and the third optical fiber receiving interface RX3, and two output ends are respectively connected with the first optical fiber receiving interface RX1 and the fourth optical fiber receiving interface RX4. The invention is convenient to complete the protection test and the optical fiber channel test work through the optical path switching of multiple interfaces.

The invention discloses a security patrol robot for a closed park. The security patrol robot comprises a moving module, and a detection module, a control module, an execution module and a power supply module which are assembled on the moving module, wherein the control module comprises a main control computer in communication connection with a power system, an inertial navigation device in communication connection with the main control computer and a wireless communication mechanism, the main control computer is in communication connection with a remote control end through the wireless communication mechanism, the detection module comprises a camera and a laser radar which are used for collecting pictures, a smoke sensor used for detecting smoke information and a toxic gas sensor used for detecting toxic gas. Compared with a crawler-type mobile chassis, a wheel-type mobile chassis has the advantages of high speed, high efficiency, low motion noise and high flexibility, and can normally operate in an uneven ground working environment; and the camera, the laser radar, the smoke sensor and the poison gas sensor are matched for use, so that security patrol can be effectively carried out in the closed park.

The invention relates to a photomultiplier pinhole detector, which mainly comprises a frame and a power source, wherein the frame is provided with a shading light anti-scuff bracket, the upper side of which is provided with a light box; the light box is internally provided with an ultraviolet tube; a detecting zone is arranged between the shading light anti-scuff bracket and the light box; the lower side of the shading light anti-scuff bracket is a main box body which is fixed on the frame; the main box body is internally provided with a camera bellows, the upper part of which is provided with a light inlet opening; an organic glass dust-free cover board is arranged on the light inlet opening; and the inner wall of the camera bellows is provided with a reflecting layer and the camera bellows is internally provided with a photomultiplier which is provided with a positive pole output. The photomultiplier pinhole detector obtained by the invention fast and intelligently detects pinholes on a production line by adopting a photoelectricity combination means, has very high detecting precision and detecting efficiency, and can effectively overcome subjectivity quality affirmation of detecting professionals which is carried out by experiments.

The method prepares desired organic conjugate material photo crystal of three-dimensional non-linear by self-organizing growth of organic conjugate material, pumping laser incomes the photo crystal along [111] crystal orientation of the organic conjugate material photo crystal to excite third order non-linear effect of organic conjugate material so as to change photo band gap position of crystal, the photo band gap position can be changed by regulating pumping laser strength so tuning of response time up to fs order for the photo crystal in organic conjugate material is achieved. The device which comprises pumping light path, detecting light path and signal processing system is provided in the present invention.

The invention relates to a single-photon nanosecond time resolution detection system, and the system comprises an APD detection module which is used for carrying out the detection of an X-ray single-photon signal and outputting a detection signal; a pre-amplification module which is used for receiving the detection signal outputted by the APD detection module and carrying out the amplification and outputting of the detection signal; and a time measurement and reading module which is used for receiving the detection signal outputted by the pre-amplification module and a triggering signal comprising a start point, and is also used for measuring the time interval between a moment of receiving the detection signal to the start point, and outputting the time interval. The system achieves the high-efficiency detection of continuous X-ray photons after the triggering signal while improving the integration degree and flexibility of the system.

The invention discloses a time resolution fast response X ray detector, comprising a shell, a cathode, an anode, a coaxial output window and a high-voltage input connector. The anode is barrel-shaped, the bottom of the anode is of a smoothly beveled dense sieve pore structure, and a high-voltage resistant film is pasted on the external sidewall of the anode; the high-voltage resistant film is externally sleeved with the shell; and the anode, the high-voltage resistant film and the shell form a capacitance structure. The detector provided by the invention has the characteristics of fast time response, high-voltage resistance, small volume and steady work.

Provided is a valve timing adjustment system having improved control for achieving a target rotational phase. The valve timing adjustment system includes: a displacement mechanism unit that displaces a rotational phase of a camshaft relative to a crankshaft of an internal combustion engine; a locking mechanism unit that locks the rotational phase at an intermediate locked phase positioned within a displacement range of the rotational phase; a hydraulic pathway that hydraulically drives the displacement mechanism unit and the locking mechanism unit; and a control unit including a control system that controls operations of the hydraulic control valve. The control unit changes a temporal responsiveness of the control system based on a displacement force that displaces the rotational phase.

The invention relates to a traveling wave antenna plasma source which is composed of six loop antennas and placed outside a vacuum chamber. The first antenna at the front end is connected with a radio frequency source to serve as a power feed-in end, the four antennas in the middle are short-circuited to serve as coupling ends, and the antenna at the tail end is connected with a 50-ohm dummy load to serve as an absorption end. The radio frequency plasma source with high coupling efficiency and low reflection can be obtained, the coupling efficiency can reach 100%, and the reflection power can be reduced to zero.

The invention provides an intelligent design method of a microwave broadband supersurface absorber. According to the intelligent design method, a deep learning method is adopted, so that a user can select the absorption spectrum according to own requirements. The deep learning method is composed of an automatic coding network and a convolutional neural network. The two neural networks are combined, and an ensemble learning strategy is adopted. Intermediate layer implicit features of the automatic coding network are used as input of the convolutional neural network, and finally the convolutional neural network outputs structural parameters of the microwave absorber. According to the method, overfitting in deep learning training can be reduced to a great extent, so that the accuracy of the whole intelligent design can be greatly improved. The method has the advantages of fast time response, high accuracy, low cost and the like.

The invention provides a battery connection system for electric and / or hybrid vehicles. The invention refers a system for connecting and disconnecting batteries (1) from a propulsion engine (8) of anelectric and / or hybrid vehicle. At least one of a first or second main switches is implemented as semiconductor switching device (13) operated by a controller (15), to selectively connect and disconnect a battery (1) from a load (2), respectively through positive and negative high-voltage buses (10,11). The controller (15) is adapted for switching on and off the first and second switching devices,and to modulate the current flowing from the battery (1) to the load (2) to maintain the current below a limit for charging capacitance of the load and limiting inrush currents. Therefore, the pre-charging operation is carried out by the main switches, so that the use of a pre-charging circuit is avoided.