227 results about "Camera obscura" patented technology

The invention discloses a pipe online defect detection method and system, and relates to the technical field of image detection. The detection method comprises the following steps: placing a to-be-detected pipe in a dark box environment, irradiating the to-be-detected pipe in a rotating state through a light source, displaying a pipe projection on a projection surface, and setting a detection line at the upper end of the projection surface; comparing the detection line with a set reference line in real time, and marking a suspected warping area according to the local offset; performing three-dimensional image reconstruction on the suspected warping area to generate a simulation three-dimensional point cloud model; the method is technically characterized in that preliminary judgment passes through a grading strategy of'rapid screening-precise reinspection ', and the detection speed and precision are balanced; by means of the optical path principle and threshold value comparison, positioning operation of the whole-surface suspected warping area can be rapidly completed, only data of a local area (suspected warping area operation) is analyzed, the hardware cost and energy consumption are greatly reduced, and the high-speed online detection requirement is met.

The invention discloses a diffuse transmission spectrum nondestructive testing method and a portable device for large thick-peel melons and fruits, belongs to the field of nondestructive testing of fruit quality, and provides a real-time and portable internal quality nondestructive testing method and device suitable for the large thick-peel melons and fruits. The system comprises a camera obscura, a shading sucker, an annular shading sponge, a light source module, a spectrum detection module, a collimating lens, an optical fiber, a Raspberry Pi controller and a touch screen. During working, the halogen light source emits a focused light beam to penetrate through melons and fruits, the focused light beam is converted into an electric signal by the spectrum detection module after being scattered and transmitted, and the Raspberry Pi analyzes in real time to obtain and display indexes such as hardness, pH, soluble solids and the like. A 220V industrial power supply is adopted to drive a high-power light source, a cooling fan and a shading sucker structure are combined to reduce environmental interference, and an annular shading sponge ensures that a light path is closed. An integrated portable device of a high-power light source is realized, and the device can be used for on-site rapid nondestructive detection of key quality indexes of large thick-peel melons and fruits such as Hami melons and the like.

The invention relates to a soil greenhouse gas emission flux detection experiment system, and belongs to the field of air pollution detection. The experimental system is used for detecting soil greenhouse gas emission flux in a potted plant and comprises a gas analysis device, a static camera bellows and a gas collection device, the static camera bellows and the gas collection device correspond to the potted plant, and the static camera bellows is used for collecting greenhouse gas emitted from the potted plant in a closed mode. A greenhouse gas sample in the static camera obscura is collected into the gas analysis device through the gas collection device, and a soil turning mechanism is arranged in the static camera obscura. The experimental system is used for performing pre-experiment on potted plants without applying soil amendments, then applying different soil amendments to the potted plants with consistent detection results, performing formal soil greenhouse gas emission flux detection experiment, and uniformly distributing the soil amendments through the soil turning mechanism, so that experimental errors are reduced, and the experimental efficiency is improved. The detection precision of the greenhouse gas emission flux of the soil under the application of different soil amendments is improved.

The invention discloses a seed vigor detection device based on a polarization spectrum technology, which comprises a large-stroke electric control mobile platform, a black paperboard, a seed sample, a halogen light source, a polarizer, a lens, a hyperspectral sorter, an analyzer and a computer, and all the parts are arranged in a camera obscura; the light emitted by the halogen light source is reflected by the polarizer and the seed sample, reaches the lens and is captured by the hyperspectral sorter; the invention also provides a detection method which comprises the following steps: firstly, collecting spectral data; carrying out image analysis; preprocessing the polarization spectrum data, performing competitive adaptive reweighting algorithm dimension reduction, and selecting a characteristic wavelength; finally, establishing a seed vigor detection model, fusing ideal modeling methods by adopting Blending ensemble learning, and carrying out hybrid modeling on the grain seeds; the polarization hyperspectral technology is introduced into the field of seed vigor detection, the seed vigor detection precision is improved, and rapid and nondestructive detection of the soybean seed vigor is achieved.

The invention relates to the technical field of magnetic material detection, in particular to a neodymium iron boron magnet surface defect detection method and system.The method comprises the steps that a closed camera obscura type image acquisition platform is built, and an annular uniform light source, an industrial camera and an objective table are arranged in the closed camera obscura type image acquisition platform; placing the neodymium-iron-boron magnet on an objective table, then controlling the objective table to move according to a set path, and triggering an industrial camera at each acquisition point to shoot a magnet surface image to obtain neodymium-iron-boron magnet surface image data; carrying out data preprocessing on the obtained neodymium iron boron magnet surface image data; extracting surface image features of the neodymium-iron-boron magnet based on a gray-level co-occurrence matrix after data preprocessing is completed; after feature extraction is completed, a neodymium iron boron magnet surface defect detection model based on deep learning is constructed and trained, and after training is completed, neodymium iron boron magnet surface defect detection is conducted. According to the method, the surface defects of the neodymium-iron-boron magnet are accurately detected through a method of combining image detection with machine learning, the product quality is guaranteed, and the automation level of detection is improved.

The invention relates to the technical field of artificial intelligence monitoring, in particular to a bid evaluation site multi-modal behavior compliance monitoring method and system, and the method comprises the following steps: deploying an array microphone and a high-definition camera in a bid evaluation room, and synchronously collecting the sound and image data of bid evaluation experts and workers; meanwhile, personnel position information is collected in real time through a Bluetooth low-power-consumption or ultra-wideband tag; the bid evaluation method has the beneficial effects that sensitive languages, private communication, file or storage medium transmission, illegal use of electronic equipment, unauthorized leaving and other behaviors of judges and workers are recognized in real time in the bid evaluation process, and risk early warning or forced intervention is generated in real time, so that hidden dangers of camera obscura operation and serial fraud are eliminated. Meanwhile, the invention also aims to automatically store traceable audio and video evidence and behavior logs and provide reliable support for subsequent auditing and law enforcement evidence collection, so that the openness, justice and compliance levels of bid evaluation activities are comprehensively improved.

The invention relates to the technical field of petrochemical instrument measurement, in particular to a non-contact tension ring size measuring device and method, and the device comprises a camera obscura, a light source, a slit, a sliding rail with scales, a vertical horizontal hanging rod, an adjustable hanging line, a horizontal movable tension ring clamp and a movable coordinate paper clamp, a projection of the tension ring is formed on the coordinate paper. The actual diameter of the tension ring is obtained through the similar triangle relation; and evaluating the roundness through the multi-axial projection diameter difference. The device is simple in structure, low in cost and accurate in measurement, and can replace an expensive imager to be used for non-contact measurement of the outer diameter of the platinum ring.

The invention discloses a multi-dimensional spectrum detection device based on combination of a transmission surface and a scattering surface, and belongs to the technical field of spectrum detection.The device comprises a camera obscura, a light source part, a detection part and a sample pool, the detection part and the sample pool are arranged in the camera obscura, the light source part comprises a light source and an angle fixing base, and the light source is connected to the angle fixing base through an optical fiber; an achromatic collimator is arranged on the end surface of the angle fixing seat and is arranged below the sample pool; the detection part comprises an emergent light detector arranged right above the midpoint of the sample cell and a plurality of scattered light detectors arranged on the side surface of the sample cell, and the emergent light detector collects transmission light spots generated after the sample is irradiated and obtains transmission information; the scattered light detector collects scattered light spots generated after the sample is irradiated and obtains a scattered spectrum image. According to the invention, the limitation of a single detection mode is effectively reduced, the distribution characteristics of scattered light at different angles and background information of transmission light are utilized to form complementary calibration, and the spectral quantitative analysis precision of the substance component content is improved.

The invention provides a printed matter online detection device, and relates to the technical field of new material detection. The printed matter on-line detection device comprises a visual detection mechanism connected to the inner top of a detection camera obscura; the positioning box is connected to the upper belt surface of the belt conveyor so as to transport the positioning box to a detection position, the detection position directly faces the visual detection mechanism, the positioning box comprises a box body and a rubber plate, the top of the box body is provided with an opening, the rubber plate is connected to the opening so as to form a deformable cavity with the box body, and when the air pressure of the deformable cavity is increased, the rubber plate protrudes to enable the rubber plate to be in contact with the deformable cavity. And when the air pressure of the deformable cavity is reduced, the rubber plate is sunken. According to the method, the coating is subjected to tensile stress when the brush electronic tag adopting the nano coating technology is bent upwards and is subjected to compressive stress when the brush electronic tag is bent downwards, the visual detection mechanism can capture the problems of coating microcrack propagation paths, interface layering tendency and the like caused by the stress, and failure mechanism analysis of the nano coating under the bending working condition is achieved.

The invention discloses a granular fertilizer flow sensing device machine and a control system and a control method thereof. The granular fertilizer flow sensing device comprises a camera obscura shell, an industrial camera, an LED lamp, a black background plate and a core controller; the core controller adopts an improved YOLOv5s-seg model to carry out segmentation detection on a granular fertilizer image collected by the industrial camera, mask contour information is extracted, and the real-time fertilizer discharge flow is calculated according to the mask contour information. The control system comprises the sensing device, a fertilizer box, a Hall speed measurement module, an aperture type fertilizer feeding device and a microprocessor; and the microprocessor drives the aperture type fertilizer feeding device to adjust the opening degree of the fertilizer feeding port through a fuzzy PID controller algorithm based on the target fertilizer feeding flow and the real-time fertilizer feeding flow. Through high-precision visual sensing, advanced image processing and closed-loop control, precise monitoring and precise regulation and control of the flow of the granular fertilizer are realized, and the fertilization uniformity and the fertilizer utilization rate are improved. The precise fertilizing device is mainly used for precise fertilizing operation of the centrifugal fertilizer distributor.

The invention discloses a smart home reading lamp test camera obscura and a use method thereof, and belongs to the technical field of reading lamp test. A smart home reading lamp test camera obscura comprises a box body with an opening formed in the upper end, and further comprises two box covers which slide on the two sides of the box body respectively, and the box body is provided with an opening and closing assembly used for driving the two box covers to move oppositely; the wire passing hole comprises two arc-shaped grooves, and the two arc-shaped grooves are formed in the sides, close to each other, of the two box covers respectively; the wire tightening assembly is arranged on the box cover and used for tightening a connecting wire of the reading lamp; the guide frame is connected with the inner wall of the box body through a connecting block; reading lamps of different sizes can be rapidly placed and tested, and the testing efficiency is improved; and the light performance of the reading lamp can be tested from different positions in the camera obscura only through one illuminometer light sensing device, so that the overall luminous flux of the reading lamp test is realized, and the accuracy of the test result is improved.

The invention discloses ceramic surface roughness detection equipment, and relates to the field of ceramic surface detection devices.The ceramic surface roughness detection equipment comprises a fixing frame, a workbench is fixed to the fixing frame, a displayer is installed on the workbench, an air cylinder is further fixed to the workbench, a carrying table is arranged above the workbench, and a camera obscura is fixed to the left side of the workbench; and the limiting mechanism is used for clamping and limiting the ceramic plate. According to the ceramic surface roughness detection equipment, the detection mechanism with the laser irradiation range adjustment function is adopted, the width of a ceramic plate can be automatically adapted to adjust the laser detection range in the ceramic plate detection process, it is guaranteed that the laser detection range is automatically matched with the width of the ceramic plate, and it is guaranteed that light spots completely cover the surface of the to-be-detected ceramic plate; the reflection interference caused by the fact that laser overflows to a carrier (such as a metal or glass carrier) is avoided, the signal-to-noise ratio (SNR) of scattered signals is improved by 40% or above, the Ra measurement error is controlled within + / -2%, and the accuracy of detection data is effectively guaranteed.

The invention discloses a disease prediction system and a disease prediction method based on urine image recognition, which are used for analyzing the physical properties of a urine sample by measuring the optical properties (such as reflectivity, polarization state and the like) of the urine sample by using a polarized light technology so as to realize the prediction and early detection of diseases. The light source module achieves time-sharing excitation through LED sets arranged in an annular array, mirror reflection components are separated in real time based on a polarization filter in a reflection suppression mode, a light source is directly driven to close a decision, a real-time closed loop from optical perception to light source control is formed, and dynamic liquid level reflection noise is eliminated from the source. The image acquisition module is combined with an ambient light differential compensation mechanism, and the angle of a polarization filter and a light source is cooperatively calibrated, so that the system stably works under a non-camera obscura condition; the control module dynamically adjusts the detection frequency based on the liquid level curvature change rate, the urine image color fidelity and the disease prediction accuracy are improved, meanwhile, user operation inclination tolerance is compatible, and the use reliability is improved.

The invention discloses a method and a device for testing the horizontal resolution of a mining camera, and belongs to the technical field of camera performance evaluation and test.The testing method comprises the following steps: electrically starting, and aligning a to-be-tested mining camera with a test graphic card in a camera obscura; configuring automatic testing software, and starting testing after configuration is completed; adjusting the brightness of the light source to enable the illuminance in the camera obscura to reach a specified value, and monitoring the illuminance by using an illuminance sensor; the mine camera is started, the tested mine camera is focused on the test graphic card, and the camera shoots and collects an image of the test graphic card after focusing is completed; analyzing and processing the acquired image, and calculating to obtain a horizontal decomposition force of the camera under a specified illumination condition; and repeatedly adjusting the brightness of the light source, obtaining and analyzing a complete data set, and outputting a test report. The device is suitable for testing the horizontal decomposition force of the mining camera in the low-illumination environment, can accurately measure the horizontal decomposition force of the camera in the actual use environment of a mine, and makes up for the defects in the prior art.

1. The name of the product of this design: Measuring darkroom (fast). 2. Purpose of this design product: to implement navigation antenna layout to simulate navigation constellations. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model relates to the technical field of customized cabinets, in particular to a customized cabinet with a private hidden space, which comprises a cabinet body, and further comprises two hidden boxes, a box door, a push rod, a limiting block, a mounting groove, a wedge-shaped block, a connecting rod and a reset spring, a second partition plate is arranged on the rear side in the cabinet body, and the two hidden boxes are symmetrically mounted on the left side and the right side of the second partition plate; a box door is installed on the front side of the camera bellows, a push rod is connected to the front side of the box door, one end of the push rod penetrates through the box door to be connected with the limiting block, an installation groove is formed in the position, corresponding to the push rod, of the front side of the camera bellows, and a wedge-shaped block is arranged in the installation groove. Private articles can be stored through the camera obscura so as to solve the problems that according to a common customized cabinet, the inner space of the cabinet is separated only through plates, the purpose of classified storage of the articles is achieved, but the utilization rate of the inner space of the cabinet is not high, and due to the lack of a hidden space structure, the space utilization rate of the cabinet is not high. And relatively private articles cannot be stored, so that the practicability of the customized cabinet is reduced.

The invention belongs to the technical field of magneto-optical Kerr microscopic imaging, and discloses a magneto-optical Kerr instrument sample correction device and a correction method thereof.The magneto-optical Kerr instrument sample correction device comprises a machine body, imaging equipment is installed in the machine body, a sample table is arranged below the imaging equipment, a protection assembly is installed in the machine body, and the protection assembly comprises a shading plate installed in the machine body; the shading plate is slidably connected with the machine body through a moving assembly, and shading curtains are installed on the two sides of the bottom of the shading plate and slidably connected with the shading plate through opening and closing assemblies. In the working process, a closed correction environment is formed through the shading plate and the two shading curtains, the problem that the measurement precision is reduced due to the fact that ambient light can be directly overlapped in the total light intensity received by the detector and the accuracy rate of sample correction is affected is solved, the accuracy rate of sample correction is improved, and compared with a traditional totally-closed camera obscura correction device, the measurement precision is improved. Cost of shading by adopting the shading curtain is greatly reduced, personnel can enter in real time, and the method is suitable for scenes needing frequent correction.

The invention belongs to the field of gold stamping detection, and provides a gold stamping detection device which comprises a detection table, transmission rollers are rotationally connected to the two ends of the interior of the detection table, a conveying belt is in transmission connection between the two transmission rollers, and a camera obscura is fixedly connected to the side face of the detection table through a second connecting rod. And an optical sensor is arranged at the inner top of the camera obscura. According to the gold stamping machine, the optical sensor is arranged, when the placing plate moves into the camera obscura, the optical sensor can accurately detect the color, the shape and the size of gold stamping and transmit a detection result into the processor, and the processor judges whether gold stamping is qualified or not, so that the accuracy of the detection result is greatly improved, and the influence of artificial factors is avoided; in the packaging and dust removing process, the conveying belt still drives other containing assemblies to move, and compared with the existing technology that the conveying belt stops moving and then dust removing is conducted, the device does not need to stop working, and the working efficiency is improved.

The invention provides a photomultiplier nonlinearity comparison and verification system, which relates to the technical field of photoelectric detection and comprises a computer module, an electric control module, a test device, a signal generation module and a test recording module which are integrally mounted on a mounting platform, the signal generation module is used for signal acquisition and management; the electric control module is used for managing a system power supply; the test device comprises a temperature control TEC, two LED light sources, two small-hole gratings, two first convergent lenses, a reflective mirror, a first beam splitter, a four-hole shading plate, an optical filter, an attenuation piece, a second beam splitter, a second convergent lens, a standard photomultiplier, a third convergent lens, a photomultiplier to be tested and a camera obscura which are arranged in sequence. According to the scheme, the relative nonlinearity index of the photomultiplier is finally analyzed by integrating a direct current method and a reference tube method, and the method is used for more conveniently evaluating the nonlinearity of the photomultiplier to be detected in practical application.

The utility model discloses an image device with shielding X-ray radiation, which comprises a shell, and a first camera obscura and a second camera obscura which are arranged in the shell and are connected up and down, a camera module and an objective table which are distributed up and down are arranged in the first camera obscura, and a flat panel detector which is positioned above the objective table and can move along the X-axis direction is arranged in the first camera obscura. An X-ray instrument which is located below the objective table and irradiates towards the objective table is arranged in the second camera obscura or at the bottom of the second camera obscura, the outer surfaces of the first camera obscura and the second camera obscura are wrapped with anti-radiation assemblies, and windows for X-rays to penetrate upwards are formed in the positions, corresponding to the objective table, of the bottom of the first camera obscura and the top of the second camera obscura. The anti-radiation assembly comprises a pressing plate and an X-ray shielding sheet adhered to the inner side of the pressing plate, the pressing plate is detachably fixed to the outer surfaces of the first camera obscura and the second camera obscura, and the X-ray shielding sheet is located between the pressing plate and the camera obscura. According to the utility model, radiation leakage during an experiment can be effectively reduced, so that the injury to operators is reduced, and the experiment safety is improved.

The utility model discloses a plastic product die-casting device which comprises a die-casting structure, a cooling and demolding structure is fixed at the bottom of the die-casting structure, the die-casting structure comprises a camera obscura with a hollow structure inside, a discharging groove is formed in the bottom of the camera obscura, and meanwhile through grooves with sliding grooves inside are formed in the two sides of the camera obscura in a penetrating mode. A rotary heating cylinder is rotatably mounted in the camera obscura, a heat transfer belt with a mold ironing head is mounted on the surface of the rotary heating cylinder, meanwhile, a through hole sliding block set is slidably mounted in the camera obscura through a sliding groove, and a discharging device is mounted on the through hole sliding block set through a bearing rod and a rotating motor; and the bearing rod and the rotating motor are fixedly connected with the output end of an adjusting air cylinder through a connecting frame, meanwhile, the other end of the adjusting air cylinder is fixedly connected with the surface of the camera obscura through a fixing block, and according to the plastic product die casting device, fixing and driving adjustment are achieved through the arranged through hole sliding block set.

The utility model relates to a zoom read-write table, which comprises a camera obscura, a concave magnifier horizontally arranged at the inner top of the camera obscura, a semi-transparent and semi-reflecting mirror arranged below the concave magnifier and used for reflecting an object image forwards into human eyes, an adjusting assembly for driving the concave magnifier to move up and down, and a guide rail assembly for guiding the up and down movement of the concave magnifier, a projection window and a reading window are respectively arranged at the bottom and the front part of the camera obscura; the utility model has the advantages of simple integral structure, adjustable focal length as required and convenience and rapidness in use.

The invention discloses a method for synchronously and rapidly detecting the contents of tea polyphenol and caffeine in jasmine tea, which comprises the following steps of: measuring the brightness (L), the green-red degree (a), the blue-yellow degree (b), the total color difference (E) and other characteristic values of different dry tea samples by using a spectrophotometer; then, brewing and extracting with boiling water to obtain tea soup, putting the tea soup into a self-made image acquisition camera obscura, acquiring a tea soup image, and extracting a tea soup image characteristic value by using MATLAB (Matrix Laboratory); and inputting the obtained color difference of the dry tea and the characteristic value of the tea soup image into the constructed BP neural network prediction model, and respectively calculating the contents of the tea polyphenol and the caffeine in the sample. The method disclosed by the invention can be used for simultaneously detecting two indexes of tea polyphenol and caffeine, is simple and convenient to operate, does not need to use chemical reagents, is green and environment-friendly, is only 7.76% of the time consumed by a detection method of a traditional national standard method, and greatly improves the detection efficiency.

The utility model discloses a camera obscura for receiver testing. The camera obscura comprises a box body; a transmitting antenna, wherein the transmitting antenna is arranged in the box body; and the mounting seat is arranged in the box body in a sliding manner and is arranged to be used for mounting a test product. According to the camera obscura for testing the receiver, the transmitting antenna and the mounting base are integrated in the box body, and compared with a darkroom, the camera obscura which is independently designed does not need to be reserved in use and does not have a complicated process, so that the receiving and transmitting signal testing efficiency of the receiver can be improved; the camera obscura is small in overall size and convenient to move, portable design is achieved, a certain number of camera obscura can be customized according to requirements, receiver testing is facilitated, and using is more flexible; when the camera obscura is used for testing, only the cost for manufacturing the camera obscura and the tool cost for fixing different receivers need to be paid, so that the cost is greatly reduced.

The utility model provides a telescopic camera obscura. The telescopic camera obscura comprises a telescopic cylinder, an imaging device and a shading plate, the shading plate is arranged at one end of the telescopic cylinder, the shading plate and the imaging device are arranged in the telescopic direction of the telescopic cylinder, the imaging device is connected with the telescopic cylinder, and the imaging device is a semitransparent device; the light shielding plate is provided with a light inlet hole, and the light inlet hole transmits light on an external object to the imaging device so as to present the appearance of the object on the imaging device. According to the utility model, the realization of the telescopic camera obscura is facilitated.

The application relates to the technical field of image acquisition and processing devices, and discloses a projection device for tongue surface detection, a connecting rod is fixedly connected to a rotating frame, a shielding curtain is detachably connected to the connecting rod, the bottom of the shielding curtain abuts against the bottom of a dark box, the surface of the shielding curtain is provided with a carbon fiber layer, the top of the dark box is provided with an air hole, the air hole is located on the front side of the shielding curtain, and the dark box is connected with an air outlet cavity. The photos taken by the device have high consistency for people with different postures and body shapes, and the machine analysis is facilitated. In addition, under the isolation and guiding action of the shielding curtain, the flow direction of the gas is consistent, the old gas carrying bacteria is further isolated by the airflow itself, the shielding curtain has the functions of adsorption and isolation, the airflow is guided and bound, the spread of droplets in the dark box is avoided, and the adhesion of the droplets to the camera and the coaxial light source is reduced.

This invention discloses a device for detecting the wall thickness of a transparent container, relating to the field of detection technology. It includes a dark chamber with a lid on top, an analysis component, a positioning component on the top of the lid, a light source component fixedly mounted on the side of the dark chamber, and a rotating component at the bottom of the inner cavity. A transparent container body is placed on the rotating component. This invention utilizes the fact that light rays incident at an angle to the surface of the transparent container body undergo two refractions upon passing through and after passing through the medium of the transparent container body, forming a three-segment light ray. The thickness of the medium of the transparent container body can be determined by the horizontal projection distance of the ray in the medium of the transparent container body. Furthermore, based on the known length of the horizontally emitted ray B, the percentage of ray A within the first medium can be calculated, thus yielding the target wall thickness.

The invention is suitable for the technical field of packaging material detection, and provides a packaging material light transmittance detection practical device which comprises a detection table, the detection table is fixedly connected with box bodies, the side walls of the two sides of the box bodies are rotationally connected with guide rollers, one side of each box body is provided with a winding machine, the winding machines can wind and tension the packaging material, and the detection table is fixedly connected with the box bodies. A supporting frame is arranged on one side of the box body, the supporting frame is fixedly connected with the detection table, the supporting frame is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a box cover, a detection lamp is arranged in the center of the bottom of the box cover, and the box cover is connected with a sealing mechanism. By introducing the air pressure optimization system, the air pressure of the sealing mechanism is dynamically regulated and controlled, and the problem of insufficient measurement precision caused by untight sealing of the camera obscura, light source performance fluctuation and environmental interference is solved.

The utility model discloses a batch electronic tag performance test system. The batch electronic tag performance test system comprises a test camera obscura, a winding and unwinding mechanism, an electronic tag reader and an electronic tag host. The test camera obscura is used for isolating one single-chip electronic tag from other single-chip electronic tags adjacent to the single-chip electronic tag and providing a test environment required for testing the single-chip electronic tags; the electronic tag reader is arranged in the test camera obscura and is used for reading information of a single electronic tag in the test camera obscura; the electronic tag host is connected with the electronic tag reader and is used for judging whether the corresponding single electronic tag is qualified or not according to the information read by the electronic tag reader; and the winding and unwinding mechanism is used for winding and unwinding the coiled electronic tags, so that the coiled electronic tags pass through the test camera obscura. According to the utility model, through the winding and unwinding mechanism, the coiled electronic tags can be directly conveyed to the test camera obscura for detection, and the tested electronic tags can be automatically wound, so that the operation is simple, convenient and efficient.

The invention discloses a metasurface light beam focusing control device which comprises a camera obscura 1, a focusing bottom plate is horizontally installed at the bottom of the camera obscura 1, a control box body 2 is fixedly installed on one side of the camera obscura 1, and a light source panel 3 and a sample panel 4 which are parallel to each other are arranged in the camera obscura 1. And a driving device for driving the light source panel 3 and the sample panel 4 is arranged in the control box body 2. The structure is simple, incident light sources with different wavelengths can pass through a plurality of metasurface structure samples with different structures respectively, and the incident light sources with different wavelengths can pass through independent metasurface structure samples one by one; and finally, the structure parameters of the metasurface structure can be adjusted by taking the focus value on the focusing bottom plate as important reference data to realize light beam focusing control, so that the purpose of assisting in improving the precision and the performance of a metasurface optical device is further realized.