124 results about "Camera obscura" patented technology

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 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 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 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 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 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.

This utility model discloses a detection device for a low-light image intensifier, comprising a light source, an integrating sphere assembly, a dark box, and a detection component arranged sequentially. The dark box contains a clamp for mounting the low-light image intensifier, and an optical channel is provided between the light source, the integrating sphere assembly, and the dark box. The dark box includes a top plate with a mounting through-hole corresponding to the fluorescent screen of the low-light image intensifier. The detection component includes an eyepiece and a detection camera. The eyepiece is detachably connected to the mounting through-hole via a first adapter. The detection camera is located above the top plate, and a light-shielding tube is connected to its lower part. The lower end of the light-shielding tube is detachably connected to the mounting through-hole via a second adapter. This utility model integrates camera detection and visual detection into a single setup by connecting the eyepiece and the light-shielding tube of the detection camera to the same mounting through-hole via the first and second adapters, respectively, effectively improving the detection efficiency of the imaging uniformity of the low-light image intensifier.

The invention discloses a camera detection device. The detection device comprises a rack, a flexible clamping mechanism, a camera obscura mechanism, a detection scene switching mechanism, a test graphic card mechanism and an environment simulation mechanism, the environment simulation mechanism comprises a wind speed adjusting assembly, a temperature adjusting assembly and an atomization generation assembly; the camera is clamped and fixed by the flexible clamping mechanism, and can adapt to modules of different sizes and shapes; the camera realizes short-distance detection scene switching through the detection scene switching mechanism, and can be aligned with the test graphic card mechanism at the bottom of the camera obscura to carry out long-distance shooting detection; the detection scene switching mechanism can be switched among multiple scenes such as a black field, a white field, an image card and flash; the environment simulation mechanism simulates the wind speed, temperature and humidity environment when the camera works through a wind speed adjustment assembly, a temperature adjustment assembly and an atomization generation assembly, and achieves the imaging performance test under the dynamic complex condition. The whole structure is compact, efficient and accurate, and has good adaptability and environment simulation capability.

The invention discloses an industrial heterogeneous part appearance automatic detection device, and the device comprises a camera obscura frame which is used for forming a camera obscura environment for isolating external light; the collaborative robot is arranged in the camera obscura frame, and an image acquisition module is mounted on the end effector; the workpiece bearing and rotating mechanism is arranged in the camera obscura frame and is used for bearing and driving a workpiece to rotate; and the processor is connected with the collaborative robot, the workpiece bearing and rotating mechanism and the image acquisition module, and is configured to control the workpiece bearing and rotating mechanism and the collaborative robot to move cooperatively, so that the image acquisition module performs multi-angle image acquisition on the rotating workpiece, and performs defect identification and classification on the acquired images by adopting a deep learning algorithm. An intelligent analysis system is constructed in the closed camera obscura, so that imaging interference of complex curved surfaces and materials of heterogeneous parts is overcome, high-precision identification and classification of various tiny defects are realized, and the efficiency and reliability of industrial appearance detection are improved.

The invention provides a redried tobacco strip grading method and system based on computer vision, and belongs to the technical field of tobacco processing and quality control. The method comprises the following steps: firstly, detecting working conditions, including detecting the position of a pressure head, the position of a smoke box, obstacles, the working state of a press and the like; after the working conditions are met, the camera obscura is started to move to the position vertically above the smoke box; starting a light source and a camera, and collecting a clear tobacco strip image; preprocessing operations such as denoising, enhancement, cutting and color correction are carried out on the collected image; abnormal conditions including box covering, exposure, local shielding, leaf breaking and the like are detected; inputting a grading algorithm to the normal condition image, and outputting tobacco lamina grade and matching degree information; and visualizing a tobacco strip analysis result, aligning the result with the image data, and storing the result in a database. According to the method and the system, automation, high efficiency and accuracy of tobacco strip data acquisition and grading are realized, abnormal conditions can be effectively identified and processed, and the method and the system are suitable for online quality control of a tobacco production line.

The utility model discloses a modularized microwave camera obscura which comprises a camera obscura body and an antenna installation support, the antenna installation support is arranged in the camera obscura body and used for installing an antenna, and the antenna installation support is a three-axis linkage mechanism and can adjust the position of the antenna in the vertical direction, the transverse direction and the longitudinal direction. The camera obscura body is composed of a plurality of module box bodies which are detachably communicated, each module box body is provided with a box body frame, shielding plates and wood plates, the box body frames are constructed by plastic-wood profiles, the outer walls of the box body frames except the communication sides are all covered with the shielding plates, the inner walls of the box body frames except the communication sides are all covered with the wood plates, and the shielding plates are arranged on the outer walls of the box body frames. The inner side of the wood board is covered with a wave-absorbing material; a sliding supporting assembly is arranged at the bottom of each module box body and used for moving, positioning and supporting the module box bodies. The modularized microwave camera obscura provided by the utility model is installed in a modularized manner and is light in weight, the box body is convenient to transport, and an internal tested antenna can be flexibly adjusted.

The application discloses a device and method for testing the light feedback characteristic of a low-light image intensifier image tube, which comprises a light source, a neutral filter box, an adjustable aperture diaphragm, an integrating sphere, an illuminometer, a contrast test target plate, a conjugate projection lens assembly, an image tube, an industrial camera, an image tube high-voltage power supply, a computer and a test dark box. The method tests the linearity of a certain fixed spatial frequency line under the corresponding MCP voltage of the image tube, and obtains the MCP voltage of the image tube at which the light feedback occurs according to the change of the contrast of the image tube with the MCP voltage. If the brightness gain corresponding to the voltage is higher than the required brightness gain, the image tube does not have the risk of light feedback, otherwise, the image tube has the risk of light feedback. Whether the image tube and the high-voltage power supply packaged as an image intensifier have the risk of light feedback is determined. The application realizes the accurate test of the light feedback characteristic of the low-light image tube, can avoid the circulation of the image tube with the risk of light feedback, and guarantees the imaging quality of the low-light image intensifier.

The application discloses a kind of ultra-thin copper foil pinhole testing methods, comprising the following steps: S1, selecting standard size copper foil, copper foil is laid between two backing plates, form test unit, the backing plate is made of light-transmitting and can be softened at high temperature Material is made, the copper foil between interlayer can be observed through any one side of two side backing plates;S2, the upper and lower sides of test unit are covered with pressing plate, put into high-temperature vacuum press, and pressure is applied to the upper and lower sides of test unit under high-temperature vacuum environment;S3, the test unit is taken out from high-temperature vacuum press for cooling, the pressing plate is removed, and the test unit is placed together on the window of the dark box with built-in light source, so that the light transmitted from the window transmits through the copper foil, the number and position of pinholes on the surface of the copper foil are tested and counted.The application can solve the problem that existing optical microscope or image processing technology is difficult to quickly locate pinhole position on ultra-thin copper foil in a large range.

The present invention discloses an online defect detection method and system for pipes, which relate to the field of image detection technology. The detection method comprises the following steps: placing the pipe to be detected in a dark box environment, irradiating the pipe to be detected in a rotating state with a light source, displaying the projection of the pipe on a projection surface, and setting the upper end of the projection surface as a detection line; comparing the detection line with a set reference line in real time, marking the suspected warping area according to the local offset; reconstructing a three-dimensional image of the suspected warping area to generate a simulated three-dimensional point cloud model; the technical key points are: preliminary judgment is made through a grading strategy of "rapid screening → precise re-inspection", balancing the detection speed and accuracy; utilizing the optical path principle and threshold comparison, the positioning operation of the suspected warping area on the entire surface can be completed extremely quickly, and only the data of the local area (suspected warping area operation) is analyzed, which greatly reduces the hardware cost and energy consumption, and meets the needs of high-speed online detection.

This invention relates to the field of screen defect detection equipment technology, and provides a liquid crystal display screen defect detection device and method, including a conveying unit and a dynamic-static combined platform above it, as well as a three-dimensional motion unit and a defect detection camera; a fixed seat is fixed above the dynamic-static combined platform; the three-dimensional motion unit includes a horizontal arm, and the defect detection camera is located at the end of the horizontal arm; the dynamic-static combined platform includes a dynamic load module and a static load module, the dynamic load module is slidably mounted on top of the elastic seat in the left-right direction, and a reset mechanism is provided between the right end of the static load module and the right end of the dynamic load module. A stopping unit intercepts the dynamic load module to form macroscopic positioning, and a light-shielding unit drives a positioning rod to insert into a positioning cylinder to form microscopic positioning while simultaneously sealing the elastic seat. Utilizing the integrated light source array within the multi-light source integrated unit, it can simultaneously achieve continuous dark-box multi-defect type detection and precise display screen positioning to prevent tilting.

The invention relates to the field of intelligent driving, and particularly discloses a camera-based camera obscura virtual view angle adjustment method and system, a terminal and a medium, the method comprises the following steps: firstly, synchronously collecting original identification data and fusion data of a camera and a radar in a real vehicle test, and comparing the original identification data and fusion data with real physical coordinates to obtain a real vehicle reference deviation; then, initial screen projection parameter adjustment of the virtual picture is carried out based on camera hardware parameters and camera obscura geometric parameters; thirdly, running a virtual scene consistent with the real vehicle dynamics in the camera obscura, collecting camera simulation data, and finely adjusting picture zooming parameters in a data driving mode through curve fitting and residual analysis with the real vehicle data, so that the deviation mode of the picture zooming parameters restores the real vehicle characteristics; and finally, injecting feature-reproduced virtual radar data to perform a function trigger test, verifying the matching between simulation fusion data and real vehicle fusion data, and if the simulation fusion data and the real vehicle fusion data are not matched, performing intelligent diagnosis and backtracking debugging. The test reliability is improved, and the cost and the risk are reduced.

The utility model discloses a cat litter raise dust detection device, including camera obscura, feeding mechanism and industrial camera, camera obscura includes recovery box, enclosure and light source subassembly, feeding mechanism and industrial camera are respectively provided on the two adjacent side surface of enclosure, the enclosure is formed by gluing and enclosing four white matte acrylic plate, and the light source subassembly is provided with the light source subassembly. The feeding mechanism is composed of a connecting pipe and a storage assembly assembled at the top end of the connecting pipe through an electromagnetic valve flange. According to the cat litter raising dust detection device, the camera obscura is combined with the industrial camera and the feeding mechanism, quantitative detection of cat litter raising dust is achieved, high-precision imaging of the industrial camera is used for replacing naked eye observation, subjective judgment differences are effectively avoided, the accuracy of a test result is remarkably improved, and meanwhile the detection efficiency is improved. A white matte acrylic plate is used as a background plate, and black light-absorbing flannelette is attached to the three faces, away from the background plate, of the inner side of the fence in a matched mode, so that ambient light interference is effectively eliminated, and the imaging contrast ratio of flying dust particles is increased.

The present invention discloses a device for detecting the mica content in manufactured sand based on multi-light source imaging. The device comprises: a darkroom, a vibrating feeder, a first light source, a second light source, an image acquisition device, and a processing terminal. The vibrating feeder, the first light source, the second light source, and the image acquisition device are respectively connected to the processing terminal. The vibrating feeder is disposed on one side of the darkroom and is used to receive and convey manufactured sand samples and control the uniform drop of the manufactured sand samples. The first light source and the second light source are both disposed on one side of the darkroom and below the vibrating feeder, providing illumination for the falling path of the manufactured sand samples. The image acquisition device is disposed between the first and second light sources and is used to capture images of the falling manufactured sand samples. The processing terminal is used to control the operating states of the vibrating feeder, the first light source, the second light source, and the image acquisition device, and to receive and process the captured images. The device is capable of quickly and accurately detecting the mica content in manufactured sand.

This invention discloses a precision darkroom platform for single-molecule detection and its usage method. The darkroom platform includes: a skeleton; an external stress-skinned shell disposed on the outside of the skeleton to form a closed box; a precision lifting drive assembly located inside the box, including a slider guide rail, a slider, and a lead screw; a ball bearing indexing adjustment feedback system located outside the box, including a ball bearing fixing seat, a ball bearing adjustment knob, and a ball bearing assembly; the top end of the lead screw passes through the lead screw connection hole of the ball bearing fixing seat and is fixedly connected to the ball bearing adjustment knob; a ball bearing indexing groove is provided at the journal of the ball bearing adjustment knob or the lead screw, and the ball bearing assembly is disposed in the ball bearing threaded hole of the ball bearing fixing seat and pressed against the ball bearing indexing groove; a critical elongation suspension assembly including an elastic suspension belt connecting the slider and the optical detection platform; and an optical environment control assembly including a honeycomb light absorption device and a light trap heat dissipation device. The darkroom platform of this invention solves the problems of rigid vibration isolation, darkroom fine adjustment, and photothermal effects.