129results about How to "Realize non-contact detection" patented technology

The invention relates to a fast scanning method of pipeline drawbacks and a non-destructive detection device, which is more particularly suitable for fast scanning and non-destructive detection of drawbacks of the pipelines with insulation. The invention is composed of a guided wave sensor, a transmitting module, a receiving module, a signal generating module, a power amplifying module, a signal processing module, an A/D conversion module and an built-in computer system. The invention is suitable for comprehensive detection of drawbacks of pipelines with different diameters, detection of long distance pipelines, and detection of pipelines in inaccessible places. The invention has the advantages of fast and large-scale detection ability without contact, high efficiency; overcoming a plurality of limitations of the conventional non-destructive detection method; overcoming the restriction conditions of oil pollution, fouling, bending or heat insulation protective layer, judging and locating the drawbacks of the pipelines, reducing the maintenance range, avoiding unnecessary disassembly and replacement, reducing the intensity of artificial detection, and saving the human and material resource. In addition, the invention can achieve on-line monitoring, and evaluate the health condition of the element or predicts the service life of the element.

The invention discloses a secondary-projection-algorithm-based on-line non-contact contour detection system and method of an intermediate-thick plate. In the system, an area array CMOS (Complementary Metal-Oxide-Semiconductor) camera is used for acquiring an image of linear laser entering a band steel surface of the intermediate-thick plate; the shot image is processed by utilizing the secondary projection algorithm to precisely extract the longitudinal position coordinate of a laser line and the end point position coordinate of the laser line from the image; height information of the surface of the intermediate-thick plate can be calculated through the longitudinal position coordinate of the laser line; the space position coordinate of the edge of a band steel to be detected can be determined according to the height information of the surface of the intermediate-thick plate and the end point position coordinate of the laser line by virtue of vision calibration of the camera; a contour curve of the band steel of the intermediate-thick plate can be obtained after the speed data of the band steel, which is measured by a laser Doppler velocimetry, is processed by a computer. Through adoption of the system and method disclosed by the invention, on-line non-contact type high-speed detection of the contours of two sides of the band steel of the intermediate-thick plate is realized and on-line non-contact type high-speed detection of the contours of the head and the tail of the band steel of the intermediate-thick plate is realized.

The invention discloses a detecting and imaging method and a detecting and imaging device based on broadband magnetic wave reflection path parameter identification. According to the method, broadband magnetic wave is taken as a carrier, a path through which magnetic wave reflection passes is used as a reflection channel, and electromagnetic parameter characteristics of different materials is utilized, so that the internal distribution characteristics of a detected object can be identified through inversion and fusion on transfer functions and various variable forms and lossless detection and imaging can be realized. The device comprises a detection front end for detecting generation of signals, microwave transmission and reflection magnetic wave receiving, and a signal processing back end for controlling the setting of parameters, processing of receiving signals, inversion and fusion of a magnetic wave reflection path and imaging display, wherein the detection front end and the signal processing back end are connected in a wire/wireless manner, and by using software processing, the detection accuracy is improved, and the miniaturization of the equipment is conveniently realized. According to the embodiment of the invention, coupling agents, strong magnetic fields, radioactive sources and radio frequency radiation are not needed; the method and the device have the advantages of non-contact form, high accuracy, low cost and the like, and have wide application prospect in the fields of underground pipeline detection, road and bridge detection, industry and agriculture, medicines and the like.

The invention discloses an omnidirectional A0 modal Lamb wave electromagnetic acoustic sensor, and belongs to the field of ultrasonic non-destructive testing. A double-layer spiral inflection coil structure is integrated in a flexible circuit board, and the omnidirectional A0 modal Lamb wave electromagnetic acoustic sensor is designed and developed to excite single A0 modal Lamb waves in an aluminum plate. The developed electromagnetic acoustic sensor is verified by experiments, the single A0 modal Lamb waves can be excited in the aluminum plate, defects in the aluminum plate are detected by the sensor, and positioning precision is high. The developed electromagnetic acoustic sensor has fine frequency response characteristics according to verification by scanning frequency experiments, and the developed electromagnetic acoustic sensor has fine omnidirectional characteristics according to verification by omnidirectional characteristic testing experiments. By the aid of the developed omnidirectional A0 modal Lamb wave electromagnetic acoustic sensor and an array combination imaging algorithm thereof, wide-range and high-efficiency defect imaging of a plate structure can be realized, and the sensor has great application values and potentials in the field of health monitoring and non-destructive evaluation for the plate structure.

The invention relates to a tape measure scale on-line automatic detecting system based on image processing and a method thereof; the system forms a main framework by a CCD video camera, two light source devices (including a direct annular epi-illuminating light source and a side LED light source), a computer equipped with an image capture card, an operating platform provided with a neck and a shielding device, and an alarm bell. The method acquires production line moving tape measure surface images by using the CCD video camera, judges whether the scale, marks and figures on the surface of the tape measure are completely accurate by the computer processing, and further monitors by using the alarm bell. The utility system can automatically check the printing quality of the surface of the tape measure in real time, and has high detecting precision and good accuracy.

A method for detecting twelve types of narcotic drugs by utilizing TH2 technique includes preparing narcotic drugs standard sample; applying TH2 detection technique to carry out detection on said standard samples and setting up standard fingerprint chart bank; utilizing standard set-up fingerprint chart bank to carry out detection on unknown matter including six types of morphine narcotic drugs, three types of ice narcotic drugs, two types of drugs controlled by the state and one type of new narcotic drugs.

The invention discloses a medium or heavy steel plate morphology detection system based on a controllable symmetrical double-line laser angle, and a method thereof. A sensor cabinet is internally provided with two planar array CMOS cameras in an equal-height plane. Each planar array CMOS camera is provided with a camera lens and furthermore is fixed on a bracket through a mounting device. Two sides of the planar array CMOS camera are respectively provided with a linear laser source. A pulse speed testing velocimeter is fixed at the side of a conveyor belt. The to-be-measured medium or heavy steel plate is placed on the conveyor belt. The to-be-measured medium or heavy steel plate is provided with the laser ray overlapping area of the symmetrical linear laser sources. Correlation is formed between a photoelectric switch transmitter and a photoelectric switch receiver. The sensor cabinet is placed on a bracket. A detecting device is controlled by a control device. According to the medium or heavy steel plate morphology detection system, simple calibration method is realized in detecting by two symmetrical linear laser sources, and furthermore high detection resolution and high precision are realized. The detecting system with two symmetrical linear laser sources is adopted, thereby realizing large incident angle of the linear laser, preventing detection inflection point failure, reducing drift and ensuring accurate and reliable result.

The invention discloses a fire source positioning method and system based on a SLAM technology and image identification. The method comprises the following steps of S1, constructing a real-time map and storing the map by an autonomous mobile robot through data returned by a laser radar and through combining with an SLAM algorithm; and S2, based on the established real-time map, carrying out autonomous travelling, capturing images through a camera and carrying out fire source identification and positioning; when the fire source identification and positioning are performed, firstly, carrying outHSV conversion on the images, processing the images in RGB and HSV spaces, and setting a threshold value to analyze a color so as to obtain an exact area of a similar fire source object; secondly, through determining whether smoke is generated, and a fire source temperature is reached, distinguishing an object with a color characteristic similar to the fire source and identifying the fire source;and finally, marking a center of the fire source in the image, carrying out inverse perspective processing on the image, converting an image coordinate into a real world coordinate, and determining the position and the distance of the fire source. In the invention, fire source identification precision is improved and the position of the fire source is determined.

The invention provides a metal wire rope on-line monitoring method and device. The monitoring device comprises an in-situ monitoring terminal comprising a communication module, a monitoring signal generation module, an electromagnetic push-pull dipole type signal emission probe, a magnetosensitive signal reception probe, a received signal preprocessing module, a motion scanning module, a controller, a memory and a power supply, and a remote monitoring terminal comprising a communication module, a flaw analysis module, an imaging display module, a man-machine interaction module, a processor, a memory and a power supply. The method utilizes a magnetic signal as an information carrier, actively emits a wideband alternating magnetic field excitation signal, utilizes an array magnetosensitive element to acquire two dimensional and three dimensional induced magnetic fields and a spatial distribution case of a metal wire rope under magnetic field signal excitation, can reversely deduce the physical characteristic parameter spatial distribution case of the metal wire rope and realizes a nondestructive test and damage localization of the metal wire rope under the condition of non-contact. The method and device have the advantages of high precision, high reliability, networking and intelligentization.

The invention relates to a band sawing machine constant power sawing control method and an intelligent band sawing machine thereof; the intelligent band sawing machine comprises a control system, a saw frame system, a feeding system and a clamp mechanism; a rotary encoder is arranged on a rotary shaft of a driven saw wheel, and rotary speed of the driven saw wheel is detected in real time; a power sensor detects a frequency converter feedback current, and the current value is sent to a lower computer through the rotary encoder; the lower computer collects the rotary speed and torque data of a main motor, uses a feeding flow valve control motor to adjust the opening of the feeding flow valve, thus changing lifting speed of an oil cylinder piston rod; the lower computer can adjust the pressure of an electric-hydraulic proportional overflow valve through sensor feedbacks, thus controlling tensile force of a tensioning oil cylinder. The power of the driving main motor is fully used, sawing condition influences on the saw blade life and different material feeding force limit conditions are considered, thus realizing intelligent sawing of the band sawing machine, and effectively prolonging fatigue life of the saw blade.

The invention provides a multisectional infrared-band gas detection apparatus and method, belonging to the technical field of optical detection of gas. In the prior art, detection of different gases needs different infrared sensors, which leads to high cost of apparatuses, inconvenience of usage and limited varieties of gases for detection. The multisectional infrared-band gas detection apparatus employs a plurality of bandpass filters and an empty window; the bandpass filters and the empty window are distributed on the periphery of a rotating disk at an equal angle; all the bandpass filters have equal pass bands which are successively distributed in the infrared band; the rotating disk carries out stepped rotation, and the plurality of bandpass filters successively pass a position located between an infrared lens and an infrared photoelectric device; the infrared photoelectric device sequentially transmits a plurality of detection pulses to a signal integration circuit for packing so as to obtain an infrared radiation sequence of to-be-detected gases; the infrared radiation sequence is transmitted to an analysis and processing unit for determination of the varieties of the to-be-detected gases according to the characteristic radiation sequence databases of a variety of gases; and a displaying and alarming unit carries out displaying and alarming.

The invention discloses a non-contact type pollutant concentration diffusion detection system and method. A device part comprises a water-groove still water simulation device, a jet flow simulation device and a camera. The water-groove still water simulation device comprises a water storage box, an experiment water groove, a first constant-flow pump, a first flow guiding channel, a second flow guiding channel, a third flow guiding channel, an overflow channel, a valve, a flow weir plate, a support, a waste liquid collecting box, a water barrel and an LGY-II propeller-type current meter. The jet flow simulation device comprises a liquid storage box, a fourth flow guiding channel, a rotor flow meter, a flow control valve, a T-type porous diffusion device and a jet flow pipe. The non-contact type pollutant concentration diffusion detection system is simple and reasonable in structure, high in generality, convenient to maintain and capable of simulating the concentration diffusion of water body pollution under external conditions; a low-cost free-pollution chemiluminescence reagent is used for replacing an existing fluorescent solution to determine the concentration field of pollutant discharging, the requirement of the device is lowered, and energy is saved.

The invention relates to a microwave thermal imaging non-destructive detection system based on matrix decomposition, comprising a microwave excitation device and a thermal imaging monitoring device; the microwave excitation device includes a microwave signal generator, a microwave signal amplifier, a microwave excitation sensor and a wave-absorbing material; the thermal imaging monitoring device includes A thermal imager, a data acquisition and processing device; the data acquisition and processing device is respectively connected with the microwave signal generator and the thermal imager, so as to obtain the temperature change data of the measured object. The microwave thermal imaging non-destructive testing system based on matrix decomposition can solve the problem of rapid imaging and separation of different types of defects, highlight the feature extraction of thermal spatial patterns in the defect range, and solve the problem that adjacent defects cannot be located and separated due to temperature aliasing and the damage area of ​​subsurface defects It is difficult to effectively quantify the problem; solve the problem of automatic separation of defects, and can quickly image the impact defects and damage areas of different energies.

The invention discloses a method for simultaneously detecting precise ball hinge ball-head eccentricity and ball arm space attitude. At present, the method for effectively measuring ball hinge ball-head eccentricity and ball arm space attitude is few. The method comprises the following steps: acquiring distance between an emitting point of an ultrasonic emitter and a receiving point of each of four ultrasonic receivers, decoupling an included angle between a bar arm central axis and an Z axle and the included angle between a projection line of the bar arm central axis on an XOY plane and a X axle through a geometric principle; detecting capacitance CG1 of a spherical-crown electrode G1 and the capacitance CG3 of the spherical-crown electrode G3 to obtain the differential capacitance therebetween; detecting capacitance CG2 of a spherical-crown electrode G2 and the capacitance CG4 of the spherical-crown electrode G4 to obtain the differential capacitance therebetween; detecting the capacitance CD1 of the spherical-crown electrode D1 and the capacitance C2 of the spherical-crown electrode D2 to obtain the differential capacitance therebetween; and obtaining X, Y and Z values of the ball eccentricity. The ball arm space attitude of the ball hinge is acquired in real time based on the ultrasonic ranging principle, and the eccentricity of ball head of the ball hinge ball-head can beaccurately acquired based on the spherical capacitance principle.

The invention discloses a static magnetic characteristic measuring apparatus, comprising a detection module, a control module and an operation module, wherein the detection module comprises an N-shaped magnet, an excitation coil wound on the magnet and a Hall element placed at one end of the magnet; the control module comprises a programmable logic controller (PLC), an A/D converter, an excitation power supply, a relay and a switching power supply; the PLC is electrically connected with the A/D converter; the coil of the relay is electrically connected with the PLC; the ports of the relay arerespectively electrically connected with the excitation coil and the excitation power supply; the output end of the Hall element is electrically connected with the input end of the A/D converter; thepower supply end of the Hall element is electrically connected with the switching power supply; and the operation module comprises an industrial computer electrically connected with the control module. The measuring apparatus dispenses with demagnetization during measuring, thus realizing continuous measurement of the magnetic characteristic parameters and improving the efficiency of measurement.

The invention relates to an electromagnetic ultrasonic non-contact automatic detector for welding seams of bottom plates of storage tanks. The detector comprises a body, a non-destructive detecting mechanism, a cleaning mechanism, a positioning structure, a control mechanism, a visual monitoring structure and a data processor, wherein driving wheels are arranged at two sides of the body; a pan/tilt camera and a laser radar of the positioning mechanism are arranged at the front end of the top of the body; a camera of the visual monitoring structure is arranged at the bottom of the body; doubleguide rails are also arranged at the bottom of the body; an electromagnetic ultrasonic probe of the non-destructive detecting mechanism is arranged at the lower end of a probe landing gear; the probelanding gear is arranged on a vertical lifting mechanism; the vertical lifting mechanism is fixed on a first right-angle sliding table; the first right-angle sliding table is slidably connected with the double guide rails; a cleaning fan of the cleaning mechanism is arranged through a second right-angle sliding table; the second right-angle sliding table is slidably connected with the double guiderails; and a cleaning brush and the electromagnetic ultrasonic probe are arranged front and back along the double guide rails. By means of the detector disclosed by the invention, after being cleanedby the cleaning brush, a welding seam can be detected by the electromagnetic ultrasonic probe; and the non-contact detection can be realized.

The invention discloses a luteinizing hormone test strip analyzer, which includes a reagent card and a detection pen; the detection pen includes a casing, a light-shielding cavity arranged in the casing, and a photoelectric detection system for judging the depth of the color, An insertion port is provided on the casing of the detection pen, and when the reagent card is inserted into the detection pen through the insertion port, the detection window is correspondingly inserted into the light-shielding cavity. It uses the photoelectric detection system to collect the reflected light in the process of changing the color of the test strip, converts the optical signal into a digital electrical signal, and automatically judges the detection result according to the threshold value comparison, thereby improving the accuracy and efficiency of the measurement result, and realizing Non-contact detection avoids contamination of the detection pen. At the same time, the reagent card and the detection pen are designed separately so that the detection pen can be recycled, which not only saves the detection cost, but also makes the detection result more accurate.