46results about How to "Meet detection needs" patented technology

The invention discloses a portable Terahertz remote sensing detector and a remote detection method. The detector comprises a signal generating device, a detector, a processor and an imaging display device, wherein the signal generating device comprises a Terahertz wave radiation source, a broadband tunable laser and a plasma generator; and the detector comprises a receiving element, a detecting element and a signal modulation circuit. The detection method comprises the following steps of: 1, dividing scanning subregions and pixel points and encoding scanning output frequencies of various scanning subregions; 2, arranging an assembly and generating a remote detection signal; 3, performing two-dimensional scanning; and 4, performing signal analysis processing, namely rapidly imaging and generating a Terahertz wave image with frequency spectrum characteristics, identifying a material type of a tested object, generating a charge coupled device (CCD) image and identifying the shape of the tested object. The detector is reasonable in design, easy to operate, flexible in detection mode, wide in application range and good in detection effect, and can fulfill the aims of rapidly imaging and remotely detecting by combining THz and induced fluorescence spectrum analysis with space imaging.

The invention discloses an unmanned aerial vehicle life detection method and system based on a multi-source sensor. The method comprises the steps that S1, an unmanned aerial vehicle carries a multi-source sensor to detect and search a target area, and the multi-source sensor comprises a radar sensor used for detecting a radar image, a visible light image sensor used for collecting a visible lightimage and an infrared thermal image sensor used for collecting an infrared image; S2, signals detected by the sensors are received and fused, and an area with a life detection target in the target area is obtained according to a fusion result; The system comprises a detection search module and a multi-source information fusion module. Rapid and accurate life detection within a large range can beachieved based on the unmanned aerial vehicle, the application range is wide, and flexibility and environmental adaptability are high.

The invention provides a picosecond balance pulse signal generator. The picosecond balance pulse signal generator comprises a pulse signal generation circuit, a first shaping circuit and a second shaping circuit. The pulse signal generation circuit comprises an avalanche triode pulse generation circuit which is formed by two cascaded avalanche triodes and used for generating a bipolar nanosecond balance pulse signal by an inputted negative polarity trigger pulse signal via triggering. The front end of the first shaping circuit is electrically connected with the pulse signal generation circuit and used for shaping the nanosecond balance pulse signal so that a picosecond pulse signal is generated. The front end of the second shaping circuit is electrically connected with the first shaping circuit and used for shaping trailing and overshoot of the picosecond pulse signal. The high-amplitude picosecond balance pulse signal generator is simple in structure and small and exquisite in circuit structure, and the generated balance pulse waveform is great in symmetry, small in trailing and high in amplitude so that the picosecond balance pulse signal generator can be applied to a pulse type ultra wide band radar system, and detection requirements of the pulse type radar system for different depth and resolution can be met.

The invention discloses a laser radar scanning method and a laser radar. The laser radar scanning method comprises the following steps that: according to a preset time interval, alternately emitting anear-frame light beam and a far-frame light beam, wherein the near-frame light beam has first field-of-view width A1 and first pulse frequency F1, the far-frame light beam has second field-of-view width A2 and second pulse frequency F2, A1 is greater than A2, and F1 is greater than F2. By use of the technical scheme provided by the embodiment of the invention, the near-frame light beam and the far-frame light beam are alternately emitted, different field-of-view widths and pulse frequencies can be used for meeting the detection requirements of different detection distances, and meanwhile, thescanning method is simple and is favorable for lowering requirements on production debugging.

The invention discloses a close distance visual blind area human body detection method. A hardware system comprises a main control end and detection terminals, a wireless communication network is formed and deployed on a service object or an adjacent area totally or partially, at least one detection terminal comprises a human body detection sensor module, the main control end receives detection data sent by the detection terminals through wireless communication modules of the detection terminals through wireless communication modules of the main control end, and detection results are shown on showing modules after the data are processed. Functions of the main control end and the detection terminals can be integrated, detection capacity and energy consumption are improved further, and wireless communication modes of the method are replaced by wired communication modes totally or partially. The invention further discloses a detection device manufactured according to the method. The detection device adopts a ZigBee chip and uses a light-emitting diode (LED) lamp and a horn to show the detection results. The invention further discloses a deploying method of one electricity-saving working mode and two kinds of detection terminals and a detection data analysis method.

The invention provides a joule-level three-wavelength tunable single-frequency pulse laser which comprises a seed laser module, an oscillator, a multi-stage amplifier, a nonlinear conversion module and a three-wavelength and three-beam output switching module. According to the invention, hundred-hertz single-frequency pulse output with the total energy of 1064 nm, 532 nm and 355 nm as the joule level can be realized; the pulse laser can be used for satellite-borne hyperspectral laser radar to quantitatively obtain multi-parameter information of cloud-aerosol; the pulse laser can be used for asatellite-borne wind measurement laser radar to obtain global atmospheric wind field information at the height of 3 to 30 km; and the joule-level single-frequency pulse amplification problem, the single-frequency pulse high-efficiency frequency multiplication problem, the three-wavelength and three-beam switching problem and the three-wavelength energy tuning problem are mainly solved.

The invention discloses a space radiation detection device and method. The space radiation detection device comprises a Si-CLLB detector and a control module; the Si-CLLB detector comprises a Si detector and a CLLB crystal detector which are sequentially arranged in the incident direction of radiation particles, the Si detector and the CLLB crystal detector are coupled, and the CLLB crystal detector comprises a CLLB crystal and a silicon photomultiplier; the control module is arranged on the Si-CLLB detector, the CLLB crystal detector outputs signal waveforms with different speed components under the condition of different radiation particles, and the control module is used for carrying out pulse signal processing on output signals of the CLLB crystal detector, distinguishing the radiationparticles and acquiring energy and flux of the radiation particles. According to the invention, the Si detector and the CLLB crystal detector are coupled to form the Si-CLLB detector, the energy resolution of the CLLB crystal is high and can reach 5-6%, the discrimination capability of radiation particles is significantly improved, particle discrimination and energy and flux measurement functionsare integrated, composite measurement can be carried out on charged particles, gamma rays and neutrons, and the detection requirements of different particles are met.

The invention provides a single-chip multi-colored photoelectric detector, which comprises a substrate, wherein a first absorption layer structure, a second absorption layer structure to an ith absorption layer structure to an Nth absorption layer structure are sequentially formed on the substrate from bottom to top, N is a positive integer larger than 1, and i is a positive integer larger than 1and smaller than or equal to N; each absorption layer structure is provided with a lower contact layer, an absorption layer and an upper contact layer, and the contact layers of the two adjacent absorption layer structures are shared; and the absorption wavelengths of the N absorption layers are gradually increased along a light incidence direction. Through the adoption of the structural design ofa multi-colored detector, multi-colored synchronous detection or selective bandpass detection in the short-wave infrared or visible short-wave spectrum range can be realized.

The invention discloses a bedrock fracture dominant channel detection method based on a high-density electrical method, and relates to the technical field of bedrock fracture research. The method comprises the following steps: monitoring instantaneous rock mass resistivity of each point in bedrock for multiple times in a monitoring period through a high-density electrical method instrument, calculating to obtain rock mass resistivity change rate of each point in the bedrock, and determining distribution points of fracture dominant channels according to distance and depth information corresponding to a peak point of the rock mass resistivity change rate; and finally, connecting the distribution points to obtain accurate fracture dominant channel form and spatial position information. The technical blank of field fracture dominant channel form detection is filled, the distributed conductivity meter is arranged in the observation well, the spatial position information of the fracture dominant channel is corrected through the depth corresponding to the peak point of the fluid conductivity change rate, and the accuracy of the fracture dominant channel detection result is ensured.

The invention provides a method for customizing an AFM probe based on FIB equipment and an atomic force microscope. The method comprises the following steps: providing FIB equipment, fixing a needle tip substrate and a cantilever beam substrate on a sample table, and placing the needle tip substrate and the cantilever beam substrate in a process chamber of the FIB equipment; cutting a needle tip with a required length from the needle tip substrate by utilizing focused ion beam etching, and etching a mounting surface at one end of the cantilever beam substrate by utilizing focused ion beam etching; placing one end of the needle tip on the mounting surface, and fixing one end of the needle tip and the mounting surface by utilizing focused ion beam deposition; and performing bombardment sharpening on the needle tip by utilizing focused ion beam etching so as to process the needle tip into a needle tip with a required size, thereby obtaining the required AFM probe. According to the preparation method of the AFM probe with the controllable needle point height and curvature radius, the FIB technology is utilized, the probe preparation flexibility is greatly improved, the method can be used for customizing AFM probes with various special parameters to meet different detection requirements, the preparation yield is increased, and the preparation cost is reduced.

The embodiment of the invention provides an atmosphere detection system. The atmospheric detection system comprises a near space floating platform, a connecting device, a nacelle and an in-situ detection load. The nacelle is connected with the near space floating platform through the connecting device. The in-situ detection load is installed in the nacelle to detect atmospheric environment parameters in the near space. By means of the structural arrangement, the atmospheric detection system can achieve in-situ detection of the near space atmospheric environment, and the detection precision of near space atmospheric environment detection is greatly improved. Meanwhile, the combination of the near space floating platform and the in-situ detection load is adopted for atmospheric detection, so that the cost of atmospheric detection can be reduced, and the efficiency-cost ratio is increased. In addition, the near space floating platform can start a detection function at different height positions, and the detection requirement of a near space atmospheric environment vertical structure can be met.

The invention relates to a communication system based on an underwater mast, and solves the problem that the mast of the existing underwater vehicle cannot meet the detection requirement, and the underwater mast comprises a pitching shaft body, a cabin body and a double-axis servo system, the communication system comprises a data acquisition unit, a main control unit, a data transmission unit, a data storage unit and a ground remote control system, the data acquisition unit is used for acquiring data in the navigation process of an underwater vehicle; the main control unit is used for processing the acquired data, and calculating a preset pitch angle and a preset course angle, planning an underwater vehicle route, controlling navigation and controlling the double-axis servo system according to the processed data information; the data transmission unit is used for sending data processed by the main control unit and receiving data of the ground remote control system; and the data storage unit is used for storing data information. The communication system can meet the requirements for storage type concealment, low resistance and high water tightness of navigation of the unmanned underwater vehicle at the same time, and the real-time communication can be achieved.

The invention discloses a non-contact multi-scale crack identification method. The method comprises the following steps: (1) acquiring surface image data of a to-be-detected object; (2) converting theimage into a grayscale image; (3) performing threshold processing on the image to separate the crack from the background; (4) setting a local threshold value, processing the selected local area, andremoving stains in the background; (5) extracting independent cracks in the image; (6) performing noise point filtering on the independent cracks, and judging true cracks in the independent cracks; (7) assembling all the true cracks to obtain a final crack image; meanwhile, analyzing the geometrical characteristics of the cracks, and outputting the geometrical information of the cracks. The methodis ingenious in design and convenient to apply, non-contact real-time monitoring of cracks is achieved in mechanical research, and the crack behavior can be monitored in the loading process; meanwhile, automatic monitoring, detection and analysis of cracks in the engineering field can be achieved, and the problem that time and labor are consumed for crack monitoring in the engineering field is solved.

The invention discloses a high-altitude flat-plate-type meteorological parameter measuring system and method. The system comprises a circuit board and a wind speed and wind direction detecting module,an ambient temperature detecting module, a gas pressure detecting module, a circuit temperature control module and a main control unit which are arranged on the circuit board; the wind speed and winddirection detecting module comprises a resistance temperature sensor, a first heating device and a resistance-temperature converter, and the resistance temperature sensor comprises a plurality of thermal resistors circumferentially arranged around the first heating device; the circuit temperature control module comprises a circuit temperature sensor and a second heating device; the main control unit controls the second heating device to control the circuit temperature at the safe working temperature according to the circuit temperature detected by the circuit temperature sensor, and calculates the wind speed and the wind direction according to an ambient temperature value obtained by the ambient temperature detecting module, a gas pressure value obtained by the gas pressure detecting module and temperatures values of the thermal resistors. The size of the provided system is small, and integrated measurement of meteorological parameters can be stably and reliably conducted in a low temperature and low pressure environment.

The invention provides a polarization imaging system. The polarization imaging system comprises a front lens group, a filter element, a relay lens group and a photoelectric detector, wherein the relaylens group adopts a double-telecentric optical path, the front lens group and the filter element are respectively located at the object side of the relay lens group, the photoelectric detector is located at the image side of the relay lens group, the image plane of the front lens group coincides with the front focal plane of the relay lens group, and the filter element is located at the image plane position of the front lens group; and the target light is focused to the front focal plane of the relay lens group through the front lens group for primary imaging to form a first image, and the first image is subjected to secondary imaging at the photoelectric detector through twice Fourier transform of the relay lens group after invalid information of the first image is filtered by the lightfiltering element. According to the invention, the optical crosstalk can be reduced to a reasonable level, the energy concentration ratio of the target is improved, and the method has the characteristics of high signal-to-noise ratio, high degree of freedom and high spatial resolution. And meanwhile, the filters with different functions are switched at the image plane position of the front lens group, so that imaging in multiple modes can be realized.

The invention discloses a raindrop measuring method and a solid-state area array laser raindrop spectrometer, belongs to the field of rainfall measurement, and aims to solve the problems that the use environment is limited and the measurement accuracy of part of scenes is reduced due to the fact that a sampling area of an existing raindrop spectrometer cannot be adjusted and sensor transmitting and receiving ends are different. The solid-state area array laser radar sensor adopting the same transmitting-receiving end is provided, the sampling area can be adjusted within the measurement range of the sensor to meet the measurement requirements in different scenes, the size of the sensor can be effectively reduced through the sensor at the same transmitting-receiving end, installation, use and maintenance are facilitated, and the detection requirements of different scenes are met. Through the sensor, high-resolution three-dimensional point cloud data can be obtained, microscopic characteristic quantities of raindrops such as the axial ratio, the equivalent diameter, the volume and the speed can be obtained, a raindrop spectrum is calculated, and the raindrop spectrum is used for rainfall macroscopic characteristic quantities and fitting of a Z-I relation.