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

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.

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 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.

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 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.

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.