373results about How to "Quick detection" patented technology

The invention discloses a binocular visible light camera and thermal infrared camera-based target identification method. The method comprises the steps of calibrating internal and external parametersof two cameras of a binocular visible light camera through a position relationship between an image collected by the binocular visible light camera and a pseudo-random array stereoscopic target in a world coordinate system, and obtaining a rotation and translation matrix position relationship, between world coordinate systems, of the two cameras; according to an image collected by a thermal infrared camera, calibrating internal and external parameters of the thermal infrared camera; calibrating a position relationship between the binocular visible light camera and the thermal infrared camera;performing binocular stereoscopic visual matching on the images collected by the two cameras of the binocular visible light camera by adopting a sift feature detection algorithm, and calculating a visible light binocular three-dimensional point cloud according to a matching result; performing information fusion on temperature information of the thermal infrared camera and the three-dimensional point cloud of the binocular visible light camera; and inputting an information fusion result to a trained deep neural network for performing target identification.

The invention discloses a Doppler anemometer laser radar structure and detecting method based on F-P etalon, which is characterized by the following: the optical path contains Nd: YAG laser to output two beams of laser, wherein one beam is launched towards sky through two-dimensional scanning unit of plane reflector; the other beam laser intersects the input end of two-in-one optical fiber coupler through optical fiber; the optical fiber receiving port is loaded at the focus point of telescope cylinder with the optical fiber intersecting the input end of two-in-one optical fiber coupler; the output end of two-in-one optical fiber coupler connects collimating mirror through optical fiber, whose optical path loads color filter, beam splitting piece at 4:1 transparent-reflect rate, F-P etalon; one rectangle reflecting lens is set in the reflecting optical path of transparent optical path and beam splitting piece of etalon separately with one photon count detector setting on two sides of reflecting surface of each rectangle reflecting lens; the output end of photon count detector intersects data gathering and disposing equipment; the invention adopts double-brink technology to detect the layout of tropospheric atmospheric wind field directly.

The invention relates to a detection method and device of internal leakage of a hydraulic valve and belongs to the technical field of leakage detection. The detection method of the internal leakage of the hydraulic valve comprises the following steps of: adopting a combined manner of a hydraulic oil cylinder and a displacement sensor, connecting the hydraulic oil cylinder and a tested hydraulic valve with a test pipeline, converting and calculating the leakage volume of the tested hydraulic valve in a certain period of time by detecting the displacement of a piston of the hydraulic oil cylinder, and detecting the internal leakage of the hydraulic valve. The detection device of the internal leakage of the hydraulic valve comprises an experiment bench, a bidirectional-unidirectional magnetic exchange valve, a magnetic exchange valve and the hydraulic oil cylinder, wherein the test pipeline is arranged on the experiment bench and connected with the bidirectional-unidirectional magnetic exchange valve and the magnetic exchange valve, the hydraulic oil cylinder is connected with the test pipeline, a piston rod of the hydraulic oil cylinder is connected with the displacement sensor, and an tested hydraulic valve interface is arranged on the test pipeline. The detection apparatus of the internal leakage of the hydraulic valve has the advantages of simple structure, quick detection, lower cost, higher precision and high working efficiency. The method and the device are suitable for testing of pressure valves, direction valves, multipath valves, flow valves and the like.

A liquid chromatograph mass spectrometer comprises: a pump; a sample injector; a plurality of separation columns, including a first separation column and a second separation column; and mass spectrometer. The liquid chromatograph mass spectrometer further comprises: a plurality of trap columns for retaining a sample component separated by the first separation column; a first switching valve for switching between one of the plurality of trap columns and another one of the plurality of trap columns at regular time intervals in such a way that when the one of the plurality of trap columns is connected to the first separation column, the another one of the plurality of trap columns is connected to the pump, and vice versa; and a second switching valve for, when a trap column is connected to the pump, further connecting the trap column to the second separation column after connecting the trap column to solution discharging means during a predetermined initial time period, the second separation column being connected to the mass spectrometer and capable of separating the sample component in a shorter time than the first separation column.

The invention discloses a short tube flexible gear harmonic reducer of a rigid wheel tooth dip angle and a transmission rigidity testing device thereof, and relates to the technical field of harmonic reducers. According to the invention, the deflection of the flexible wheel gear teeth is caused by the reduction of the axial size of the short tube flexible gear harmonic reducer, so as to realize the reduction of the surface area between the rigid wheel gear teeth and the flexible wheel gear teeth, and to realize the lowering of the transmission rigidity; the problem of complicated operating process of the existing harmonic drive rigidity experiment testing device is solved; and the length diameter ratio of a soft wheel is 1/4 to 3/5 of a short tube wheel, the inner wheel of the rigid wheel with a dip angle is the wheel teeth with the dip angle alpha along the rigid wheel axial direction, and the deflection direction and the field angle direction of the soft wheel on a long shaft are coincident. The transmission rigidity testing device of the short tube flexible gear harmonic reducer implements current control namely torque control through a computer and a servo driver, and the harmonic drive output end realizes continuous loading unloading; and the harmonic drive rigidity of the short tube soft wheel is obtained, and the transmission rigidity is serially, rapidly accurately obtained.

The invention discloses a measurement system and method for detecting the orientation and the size of an underwater target on the basis of a laser sound source. According to the measurement system and method, the sound source is generated through lasers, laser energy is converted into sound wave energy, an acousto-optical coupling interference type optical fiber hydrophone array serves as a receiving sensor, the defects that in the optical measurement process, optical waves which are used are large in attenuation and the measuring distance is short are overcome, the defects of a sonar sensor in traditional acoustics detection are overcome, and the advantages that mobility and flexibility are high are achieved. Meanwhile, a sound source signal is generated through a laser-induced sound system, and generated sound signals have the advantages of being high in sound pressure level, wide in frequency spectrum, capable of conducting non-contact type control, and the like. An acousto-optical coupling interference type optical fiber hydrophone is used as the acoustic signal sensor, and the acoustic signal sensor has the advantages of being capable of detecting underwater acoustic signals in the non-contact mode, high in mobility, small in size, flexible in structural design, and the like.

The invention relates to a laser-displacement-sensor-based journal axle center measurement apparatus, and measurement and calibration methods thereof. The measurement apparatus comprises a measurement rack and two laser displacement sensors; and the two laser displacement sensors are installed on two intersected planes of the measurement rack respectively. The measurement rack is arranged nearby a journal of an axis component, so that a plane formed by intersection of two laser radiation lines is perpendicular to the axial central line of the journal. On the basis of the structure, the laser radiation lines of the two laser displacement sensors are fixed relative to the angel of the measurement rack; coordinates, relative to the measurement rack, of two light spot points of the laser radiation lines on the journal surface are obtained according to measurement values of the laser displacement sensors; on the premise that the diameter of the journal is known and the circular degree deviation can be ignored, position information of the axle center of the journal relative to the measurement rack is calculated based on the coordinates of the two light spot points; and a coordinate system is calculated by using a pin gauge. Therefore, problems existing in the existing image, contact type measurement head and pneumatic gauging methods can be solved; and industrial on-line measurement and application are realized conveniently.

The invention provides a method and terminal equipment of power equipment fault detection and repair. The method and the terminal equipment are suitable for use in the technical field of power systems. The method includes: according to normal running information of power equipment and running information of the preset-area power equipment, judging whether the preset-area power equipment is faulty;if yes, obtaining fault information and a fault location of the preset-area power equipment; determining to-be-selected repair personnel according to repair records of all repair personnel and the fault information; determining the target repair personnel according to locations of the to-be-selected repair personnel and the fault location; judging whether repair scores of the target repair personnel are higher than a preset scoring threshold value; and if yes, sending a repair notification to the target repair personnel, wherein the repair notification carries the fault information and the fault location. The power equipment can be conveniently and quickly detected, the matching service personnel can be found to repair the faulty power equipment, and a repair success rate can be increased.

The invention relates to a fast detection method for rape water demand information. According to the method, a near infrared hyperspectral imaging device is adopted, wherein the near infrared hyperspectral imaging device comprises a light box, a halogen lamp light source, a controller, a computer, a near infrared camera, a spectrograph, a lens, Y branch linear lamps and an electrical control displacement table. The near infrared hyperspectral imaging device is used for acquiring the hyperspectral data cube of a rape leaf; target and background difference in hyperspectral images under different wavelengths is compared; a 970-nm image with larger background difference is adopted for target background partition; the optimal wavelength of rape water content is abstracted; major constituent image data in 720 nm, 960 nm and 1450 nm positions is abstracted through ENVI software; grayness, texture and reflection strength distribution characteristic space for a major constituent image is established; a rape water content predictive model is established according to leaf water content data on the basis of the partial least square method; and rape water demand and irrigation reference information is given by referring to control group samples and real-time environment humiture data of standard management. Therefore, fast nondestructive detection of rape water demand information is realized.

The invention relates to a cooperative cloud control-based multi-unmanned-ship fleet cooperative control system and method. The method comprises the following steps: building cloud-shore connection through a shore-based control system and a cooperative cloud control system, and enabling the shore-based control system to communicate with the cooperative cloud control system based on the cloud-shoreconnection, so as to acquire control information of the shore-based control system for an unmanned ship fleet and unmanned ship fleet state information; and building cloud-ship connection through thecooperative cloud control system and the unmanned ship formation, and sending a control instruction of the cooperative cloud control system for the unmanned ship fleet based on the cloud-ship connection, so as to acquire state information of the unmanned ship fleet. According to the cooperative cloud control-based multi-unmanned-ship fleet cooperative control method disclosed by the invention, based on the cooperative cloud control system, a distributed calculation method is adopted, multiple cloud servers are called, and effective resources are fully used, so that the calculation capacity isimproved; the precision and the timeliness of unmanned ship fleet scheduling control are improved; collision of the unmanned ship fleet is effectively prevented; and furthermore, multiple unmanned ships work at the same time, so that the working speed and the working efficiency are improved.

The invention discloses a method for measuring atmospheric horizontal visibility based on a CCD (Charge Coupled Device) laser radar. The method involves the following devices: a laser transmitting part, an optical receiving part and a data collecting part, wherein the laser transmitting part comprises a laser device and a collimator; the optical receiving part mainly comprises a CCD camera and an optical filter, and the optical filter is positioned in front of a lens of the CCD camera; the data collecting part comprises a computer, and the CCD camera is in communication connection with the computer; and the laser device is used for transmitting laser to the atmospheric air horizontally, a laser path is free from blocking objects, a micro angle is formed between the CCD camera and the laser device, laser echo signals are fully received by the CCD camera, and the atmospheric horizontal visibility can be obtained after laser echo images are collected and processed by the computer. According to the invention, the devices involved in the method can continuously work day and night and have the advantages of high detecting speed, simple structure, small size, light weight, convenience for carrying and moving and wide application prospect.

The invention discloses an apparatus and a method for testing the power spectral density of a frequency noise of a laser based on a fiber resonator. The apparatus comprises a laser, a phase modulator, a fiber resonator, a photoelectric detector, a spectrum analyzer, a lock-in amplifier and a servo controller. The laser, the phase modulator, the fiber resonator, the photoelectric detector, the lock-in amplifier and the servo controller are connected in serial, wherein the servo controller is connected to the fiber resonator and the photoelectric detector is connected to the spectrum analyzer. The frequency noise of the laser is converted to amplitude fluctuation through the fiber resonator and the power spectral density of the frequency noise of the laser is tested on the spectrum analyzer. The apparatus has high sensitivity, prevents the influence of the laser intensity noise, detects fast fluctuation of the frequency noise, can be combined with frequency noise inhibition of a resonator optic gyroscope, inhibits laser-frequency noise effectively, improves detection precision of the resonator optic gyroscope, and has important scientific significance and application value.

The invention relates to a preformed eccentric post for checking the a-fetoprotein alloplasm of liver cancer, wherein said eccentric post is formed by upper separating tube and lower collecting tube; the separating tube contains affinity medium of coupled small lentils agglutinin (LCA); the bottom of separating tube is one filter cloth; the lower collecting tube contains buffer solution; said LCA can combine the a-fetoprotein alloplasm sugar chain. The invention also provides a relative chemical lighting testing agent box of said preformed eccentric post and an enzyme couple immunity quantitative testing agent box with preformed eccentric post, and relative preparation and application. Said agent box can quickly and simply test the content of a-fetoprotein alloplasm, to diagnose liver cancer.

The invention relates to a rapid original position testing method of foundation bearing capacity and deformation modulus, which comprises the following step: a steel ball whose weight is m is lifted to a certain height by a tripod and freely falls, and then the depth delta that the steel ball is compacted to press into the ground is tested. The test is repeated three times or more in a same field, the falling height of each time is different, and the indentation depth values of different depth indentations which are formed when the steel ball falls in each time are correspondingly tested, then the ultimate bearing capacity and the deformation modulus of foundation soil are calculated through the contact mechanical basic theory. The rapid original position testing method is an economical, rapid, convenient and accurate original position testing method, and is capable of rapidly screening the foundation bearing capacity of a large area site.

The invention discloses a method for detecting and repairing satellite navigation signal carrier cycle clips assisted by doppler frequency offset. A doppler frequency offset measurement value reproduced by a navigation receiver is utilized to detect and repair the cycle clips on carrier phase measurement in an assistant mode. A feasible scheme is provided for position calculation by utilizing a cycle-clip-free carrier phase measurement value in real-time positioning. In the k+1 epoch, the phase difference residual between epochs is calculated out by means of satellite carrier phase measurement values, doppler frequency offset measurement values and nominal sampling interval and accumulation cycle clips provided by a current-epoch navigation receiver and a k-epoch navigation receiver. The phase difference residual between the epochs is compared with a mean value of the phase difference residual between the epochs. When an absolute value of the difference between the phase difference residual between the epochs and the mean value of the phase difference residual between the epochs is larger than a detection threshold of the cycle clips, the cycle clips exist in a carrier phase, and an integer closest to the difference is taken to serve as a cycle clip value to repair the cycle clips of the carrier phase. By means of the method, the detection and the reparation of the satellite navigation signal carrier cycle clips can be quickly achieved in real time.

The invention provides an electronic device with ranging function, comprising at least one laser transmitting tube, two image pickup units and a control unit, wherein a laser beam emitted by the laser transmitting tube forms a light spot on an obstacle; each image pickup unit is respectively used for an image, and the image comprises the image of the light spot; the control unit is used for controlling the start of the laser transmitting tube and the image pickup units and analyzing the image obtained by each image pickup unit so as to identify the light spot icon in each image, determine theposition of the light spot icon in each image, determine the vertical distance from the light spot icon to the lens axis of each image pickup unit according to the position of the light spot icon, calculate the distance of the obstacle, and carry out corresponding operation according to the execution distance of the obstacle. The invention also provides a corresponding ranging system and a corresponding ranging method.

The invention provides a non-contact and multi-point measurement method for measuring the internal diameter of a circular hole. The method comprises the steps of constructing a three-sensor/four-sensor constant-value comparison and measurement head; adjusting the measurement optical axis of a laser displacement sensor and meeting preset conditions before measurement and after measurement respectively; and acquiring the radius of a to-be-measured circular hole. According to the technical scheme of the invention, the non-contact constant-value comparison and measurement method is adopted, and a non-contact measurement head is kept far away from the surface of a to-be-measured object. The measurement safety is improved. When the aperture of an inner hole on a workpiece is measured, the measurement head is placed in the to-be-measured hole to complete the measurement. Therefore, the centering or adjusting operation is avoided, and the measurement efficiency is greatly improved.

The invention provides a structural damage assessment method based on an ultrasonic guided-wave drive/sensing array. The structural damage assessment method comprises the following steps: firstly, pre-arranging or bonding ultrasonic guided-wave sensing units on the surface of a structure to be tested to form an ultrasonic guided-wave sensing array, exciting the various ultrasonic guided-wave sensing units in turns to generate ultrasonic guided-wave signals, and receiving the reflected guided-wave signals of the internal damages/boundaries of the structure to be tested through the ultrasonic guided-wave sensing array; then carrying out chromatic dispersion removal processing on the reflected guided-wave signals, globally imaging the structure to be tested by virtue of a phased array imaging algorithm, and locating a damage area; finally, carrying out accurate quantitative analysis on damages in the damage area by virtue of a reverse time migration imaging technology based on a multiple signal classification method with regard to the damage area and on the basis of the reflected guided-wave signals. The method realizes rapid and accurate location and assessment on damages in large structures, the exploration capacity is greatly improved, and the needed labour and maintenance expense are also reduced.

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 an electromagnetic radiation detection device and method for potential fire danger of a mine and belongs to a fire detection device and method. According to the electromagnetic radiation detection device and method, electromagnetic radiation signals generated in the temperature rising or burning process of a coal body are detected and analyzed, and then the potential fire danger of the mine is detected. The detection device comprises a perpendicular directionally receiving antenna set and a monitoring host. The detection method includes the steps that the effective receiving direction of the perpendicular directionally receiving antenna set faces a detection area, the value and the main direction of electromagnetic radiation are measured and calculated; a crossed position of main directions of different measuring points is a potential fire danger area; it is judged that fire danger exists in the area according to the average value of electromagnetic radiation indexes in the potential danger area or a dynamic change trend of the electromagnetic radiation indexes in multiple measurements in a critical value mode and a dynamic change trend mode when the electromagnetic radiation indexes or the dynamic change trend exceeds a corresponding critical value. Through the electromagnetic radiation detection device and method, potential fire risks and the potential fire danger area can be detected in time and space; the electromagnetic radiation detection device and method have the advantages of being efficient, fast and convenient.

The invention belongs to the field of immuno-chromatographic detection, and in particular relates to a quantitative detection and computation method based on the fluorescence immuno-chromatographic technology, comprising the following steps: inserting a fluorescence immunostrip dripped with a sample solution to be detected into a fluorescence immunoassay instrument, and sequentially performing irradiation with an LED light source, optical filtering processing with an optical filter, detection with a photoelectric detector, electrical signal processing, AD conversion processing, baseline correction, L-M algorithm processing, area computation and concentration computation. The quantitative detection and computation method stresses on signal reconstruction by using an algorithm, eliminates influence of noise and various interferences, ensures the signal processing course undistorted, and can obtain high-precision and low-error results, thereby quickly, conveniently and accurately determining the concentration result.

The invention provides a giant magneto-impedance effect biosensor for detecting serum tumor markers. The biosensor consists of a giant magneto-impedance effect sensor positioned on a glass substrate, an insulated layer, an Au film, a biologically sensitive film, a magnetic tag and a signal acquisition system, wherein the giant magneto-impedance effect sensor consists of the NiFe/Cu/NiFe multi-layer film on the glass substrate and is made by the microelectromechanical system (MEMS) technology; the insulated layer is the aluminum oxide layer, the Au film is the splashed Cr/Au film, and the biologically sensitive film is the self-assembled film with nano-level thickness and can be connected with various monoclonal antibodies; and the magnetic tag is streptavidin-modified magnetic nano particles or magnetic beads consisting of magnetic nano particles and can be combined with biotin-modified monoclonal antibodies or polyclonal antibodies. Based on the detection principle of a double-antibody sandwich method, the sensor has a high detection sensitivity and can detect the antigens of which the content of serum tumor markers is as high as 1ng/ml.