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 provides a YOLOV3-based smoke and fire automatic detection and early warning method. The method comprises the steps of S1, constructing a sample set of a training detection model; S2, establishing a deep learning target detection network architecture based on YOLOV3; S3, configuring training parameters, and training a detection model; S4, acquiring to-be-detected image information; acquiring image frames of an on-site video picture from monitoring equipment on a to-be-detected site, and processing frame-by-frame images by utilizing an image preprocessing method; S5, detecting smoke and flame targets, and sending the video image frames processed in the step S4 into a pre-trained detection model in the step S3 for target detection, and outputting a detection result; S6, carrying out post-processing on a detection result; and S7, continuously analyzing the detection results of the multiple frames of images, confirming that the target is valid and outputting an alarm. According to the YOLOV3-based smoke and fire automatic detection and early warning method, second-level detection and alarm can be realized, the fire early warning time is greatly shortened, timely notification and timely rescue are realized, and fire spreading is effectively prevented.

The invention discloses a full-optical laser ultrasonic measuring method for internal defects of a material. The method comprises the following steps: firstly, measuring the two-dimensional position and the size of the internal defect of a measured object on an x-y plane, and subsequently measuring the depth of the internal defect of the measured object in the z direction. By adopting the method, the three-dimensional position and the size information of the internal defect can be obtained by scanning, and the method is high in precision and efficiency, and is applicable to non-destructive detection on various materials.

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 relates to a system for detecting defects of fabric gray cloth quickly and automatically on line, which comprises a charge coupled device (CCD) camera, a computer with an image acquisition card and a stream line operation platform, wherein the stream line operation platform comprises a shielding device, two gray cloth clamp grooves and a cloth guiding rail; the CCD camera is fixed on the shielding device above the gray cloth, a lens is embedded into the shielding device, and a viewing field is aligned with the surface of the gray cloth; and a group of light-emitting diode (LED) light sources are fixed to the inner side of the bottom surface of the stream line operation platform and are arranged on the lower side of the gray cloth. In the system, the acquisition, processing and characteristic extraction of fabric gray cloth images and the judgment and control of image data are performed by the computer, so that a final result is sent to an alarm engine bell by output equipment, and the classification and statistics of the defects of the fabric gray cloth are performed. Therefore, the automated, objective, non-contact, high-accuracy and quick detection of the defects of the fabric gray cloth 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 spherical hinge movement direction measuring method based on a spherical capacitor. The existing spherical hinge degree-of-freedom testing method needs construction of a complex system, and the related technology is not mature. An absolute rotary encoder measures the angle at which an output rod rotates around the axis thereof; the forward included angle between the output rod and a vertical shaft is solved according to the effective overlap area between a first spherical crown-shaped sensing capacitor electrode at the bottom of a ball head and a second spherical crown-shaped sensing capacitor electrode at the bottom of a ball socket; and the included angle between the projection of the output rod on the horizontal plane and a horizontal shaft is solved according to a fourth spherical crown-shaped capacitor electrode with the largest capacitance, capacitance change between the fourth spherical crown-shaped capacitor electrode and a corresponding third spherical crown-shaped capacitor electrode, and the serial numbers of arc sensing capacitor electrodes of which the capacitances are not equal to zero. According to the method, the three degrees of freedom of movement of a spherical hinge are solved based on the principle in which the change of area between polar plates of a spherical capacitor causes change of output capacitance. The algorithm is simple.

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 crack defect detection method of an EL test of a polycrystalline silicon solar cell. The detection method is applicable to industrial production solar cell sites. The detection method comprises the steps that collected images are preprocessed, global threshold segmentation and opening operation and closing operation of morphology are conducted to suppress interference ofa non-processing area; then median filtering and guide filtering are conducted to remove image noise; a probe area is extracted through threshold differentiation and feature extraction, the probe areaand an area formed after threshold segmentation are subjected to complementary operation, the probe area is eliminated, and the area to be detected is remained; the smoothed images are subjected to Fourier transformation; the probe area and the area subjected to Fourier transformation are eliminated, intersection is conducted to obtain the area to be detected, lines of the area to be detected areextracted, and then whether or not the lines are cracks is judged according to the attribute of the lines. The crack defect detection method achieves non-contact detection, improves the detection quality and efficiency, effectively lowers the debris rate of the detection process, and can effectively achieve on-line automation of detection.

The invention relates to a circuit breaker contact temperature-rise detection method based on GIS casing body temperature measurement. The method comprises the steps that 1) the ambient temperature, internal pressure and load current of a GIS circuit breaker under a working condition are acquired; 2) a three-dimensional space multi-physics coupling model of contact heating in the GIS circuit breaker is established to acquire the function relationship between the internal contact temperature rise delta T of the GIS circuit breaker under the current working condition and the maximum temperaturerise delta Tw of a temperature rise sensitive area corresponding to the internal contact on the external surface of the casing body, wherein the function relationship is delta T=f (I0, T0, P0, delta Tw), I0 is the load current, T0 is the ambient temperature and P0 is the internal pressure; 3) the temperature rise distribution of the external surface of the GIS circuit breaker casing body under theworking condition is acquired, and the maximum temperature rise of all temperature rise sensitive areas on the outer surface of the GIS casing body is recorded; and 4) the temperature rise of the internal contact of the GIS circuit breaker is calculated under the working condition is calculated based on the function relationship. Compared with the prior art, the method provided by the invention has the advantages of high accuracy, high security and the like.

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 provides a workpiece quality detection method for multiple cameras. According to the method, the applied detecting mechanisms include a plurality of cameras, detecting and control systems, workpieces and working platforms; and the method is characterized by comprising the following steps: installing cameras in the detecting mechanisms, transferring the workpieces into shooting view areas of the cameras in the detecting mechanisms; acquiring the images of the workpieces from the cameras in the detecting mechanism; transmitting the images of the workpieces into the detecting and control systems through the cameras in the detecting mechanism; and processing the received images of the workpieces through the detecting and control systems in the detecting mechanism. The workpiece quality detecting method has the advantages that the multi-angle detecting and multi-view detecting in the workpiece quality detecting are achieved; the method is not only applied to detecting the quality of a common workpiece, but also meets the requirements on quality detecting of certain workpieces made of special materials and having relatively high overall dimension, thereby improving the working efficiency and the detecting precision on the workpiece quality detecting, and achieving wide application.

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 nondestructive testing system based on matrix decomposition. The nondestructive testing system comprises a microwave excitation device and a thermal imaging monitoring device, wherein the microwave excitation device comprises a microwave signal generator, a microwave signal amplifier, a microwave excitation sensor and a wave-absorbing material;the thermal imaging monitoring device comprises a thermal imager and a data acquisition and processing device; and the data acquisition and processing device is connected with the microwave signal generator and the thermal imager, so that temperature variation data of a measured objected is obtained. The microwave thermal imaging nondestructive testing system based on the matrix decomposition canbe used for solving the problems that fast imaging and separation are carried out on different types of defects, thermal spatial pattern feature extraction in a defect range is highlighted, an adjacent defect cannot be located and separated due to temperature aliasing and subsurface defect damage area is difficult to quantify effectively; and the problem of automatic separation on defects is solved, and fast imaging can be carried out on impact defect and damage area with different energy.

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 fatigue driving detection-oriented steering wheel operation feature extraction method. The method includes the following steps that: statistical analysis and comparison are performed on driver fatigue sample variables; the significance of difference of fatigue discrimination indexes under different fatigue levels is tested according to analysis results, and significance indexes are selected to construct fatigue discrimination indexes; with the classification performance of a support vector machine algorithm adopted as evaluation criteria, and a sequential floating forward selection algorithm adopted as a search strategy, a fatigue discrimination index approximate optimal selection algorithm is established, and an index system of driver fatigue state detection is established; with the index system of the driver fatigue state detection obtained through screening adopted as input, a driver fatigue state detection model can be built based on the support vector machine algorithm; and a driver fatigue state detection model considering individual difference and a fatigue detection model in lane deviation of vehicles are built based on the support vector machine algorithm. The method is suitable for generalization ability of different drivers and different operation states and can improve the recognition accuracy of the fatigue detection model.

The present invention relates to a constant power saw cutting control device of a band sawing machine. The prior control device can not adjust the saw cutting feeding speed according to the change of saw cutting load. The constant power saw cutting control device of band sawing machine comprises a displacement sensor, a tension displacement sensor, a control circuit and a proportional reversing valve. The feeding displacement sensor is disposed in a hydraulic cylinder of a band sawing machine; the tension displacement sensor is disposed in a tension hydraulic cylinder of the band sawing machine; a signal output end of the feeding displacement sensor and a signal output end of the tension displacement sensor are respectively connected to a A / D sampling module in a control circuit; a signal output end of the control circuit is connected to a signal input end of the proportional reversing valve. In the present invention, the non-contact detection to the saw cutting load of a band saw blade is realized; and real-time feedback of the saw cutting load received by the band saw blade is realized during the saw cutting procedure; the practicability and reliability are both better than the practicability and reliability of direct detection.

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 provides an oxygen concentration responsive polymer photoluminescence coating. The coating consists of an oxygen concentration sensitive function layer and a matrix resin layer mixed with nanoparticles, wherein the oxygen concentration sensitive function layer is distributed on the surface of the matrix resin layer mixed with nanoparticles. The oxygen concentration sensitive functionlayer is prepared from a metal ruthenium complex (oxygen sensitive probe molecules). The oxygen sensitive probe molecules are distributed on the surface of the polymer resin coating in the form of chemical bond and / or physical interaction, and the surface has a coarse structure of micro-nano scale due to doping of nanoparticles. The coarse surface structure and the surface distribution form of the probe improve the dynamic contact efficiency of the probe and oxygen molecules, so that the change speed of fluorescence emission light intensity is increased when the probe molecules respond to thechange of oxygen concentration on the surface of the coating, and noncontact detection of change of oxygen concentration or air pressure on the surface of the coating is realized through change of fluorescence intensity or fluorescence life of the coating. The coating is simple to prepare, has reversible response to oxygen and can be reused for a long time.

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 body temperature detection system and method for simultaneously detecting multiple persons. The system comprises a data processing unit and a plurality of recognition and detection units; the data processing unit cooperates with the recognition and detection units to carry out the body temperature detection of a plurality of detected persons at the same time; each recognition and detection unit comprises a camera probe, an iris recognition probe, an infrared temperature measurement probe and an infrared distance measurement probe; the data processing unit comprises aprocessing module, an image acquisition module, a storage module, a display alarm module and a network communication module; the infrared temperature measurement probe is connected with a temperaturecompensation module; the camera probe is connected with the image acquisition module, and the processing module is connected with the image acquisition module, the iris recognition probe, the infrareddistance measurement probe, the storage module, the display alarm module and the network communication module. According to the invention, the system can automatically detect the body temperature ofa plurality of detected persons at the same time, and the technical problems that the detection persons are easily infected, the labor intensity of the detection persons is high, and false detection is easily caused are effectively solved.

The invention discloses an LH (luteinizing hormone) test strip analyzer. The LH test strip analyzer comprises a reagent card and a detecting pen, wherein the detecting pen comprises a casing, a shading chamber formed in the casing and a photoelectrical detecting system which is used for judging color shade, an insert port is formed in the casing of the detecting pen, and when the reagent card is inserted into the detecting pen through the insert port, a detecting window is inserted into the shading chamber correspondingly. Reflection rays in a color shade change process of the test strip are acquired by the photoelectrical detecting system, optical signals are converted into digital electrical signals, a detecting result is obtained by automatic judgement according to threshold comparison, so that the precision of the detecting result and the detecting efficiency are improved, non-contact detection is realized, and pollution to the detecting pen is avoided; besides, the reagent card and the detecting pen are designed in a split manner, accordingly, the detecting pen can be recycled, detecting cost is saved, and the detecting result is more accurate.

The invention relates to the field of application of magnetic sensors, and provides a key and a keyboard. The key comprises a base body, a rotating piece, a magnetic angle sensor fixedly arranged on the base body and a moving piece movably installed on the base body along a preset track. A pressing part of the key is located on the moving piece; the rotating piece is rotatably mounted on the base body, and the moving piece is in transmission connection with the rotating piece; the rotating piece is provided with a permanent magnet. The magnetic angle sensor is used for detecting rotation of the permanent magnet. The detection performance of the magnetic angle sensor is not easily influenced by environmental factors such as temperature, so that the detection result of the scheme for detecting the motion condition is not easily changed along with the temperature change, the consistency of the detection result of the scheme in different temperature environments is relatively good, and as the detection accuracy of the magnetic angle sensor is relatively good, when a plurality of keys of the scheme are adopted to detect the same magnetic field, the consistency of detection results is good, and when the keys of the scheme are applied to a keyboard, the performance consistency of the keys is good.

The invention discloses a ball hinge capable of measuring a spatial revolution angle and offset in three degrees of freedom. A traditional ball hinge is complex in angle measurement way and difficult to ensure high measurement precision. Two arc-shaped sliding blocks of the ball hinge disclosed by the invention are connected with a sliding slot of a ball head through a rolling pair; two pin shafts fixed on the two arc-shaped sliding blocks are supported in a pin shaft hole in a ball socket base respectively; a ball head connecting rod is fixed with the ball head, and a supporting hole of an output rod is supported on the ball head connecting rod; a capacitance electrode array is arranged at the bottom of the sliding slot; four second capacitance electrode groups are arranged on the pin shafts; four third capacitance electrode groups are arranged on the ball head connecting rod; and capacitance sensing electrode pairs are arranged on inner sides of the arc-shaped sliding blocks, the hole wall of the pin shaft hole of a ball socket and the hole wall of the supporting hole in the output rod. The ball hinge disclosed by the invention can realize non-contact type detection of the spatial revolution angle and offset of the ball hinge; and furthermore, an algorithm is simple, and the precision is high.