288 results about "Darkroom" patented technology

The invention relates to the field of automobile electronic testing technology and equipment, and discloses a vehicle-mounted camera imaging quality testing method and device suitable for a rain and fog scene, and the method comprises the steps: installing a to-be-tested camera module in a rain and fog environment cabin, setting the spectrum and illumination of a top natural illumination simulation system, and simulating the illumination at different time periods; selecting a test target plate in the darkroom; starting an automatic centering module to align the optical axis with the standard plate reference; rain and fog parameters are set through the environment control host, the rain and fog supply system is started to simulate different levels of rain and fog environments, and the raindrop particle size, concentration, dripping speed, fog visibility and fogdrop particle size are dynamically regulated and controlled; shooting a target plate graph card, extracting characteristic parameters by an image analysis module, performing quantitative analysis, and generating an evaluation report, so as to solve the technical problem of singleness of rain and fog scene environment simulation in the prior art.

The utility model relates to a control device for a microwave anechoic chamber test system. Comprising a shielding box which is a sealed cavity provided with a cover plate, and the shielding box is provided with a power supply socket, a data socket and an optical fiber coupler; a control circuit board, an AC-DC power supply module, a data optical fiber transceiver and other modules are installed in the shielding box. A plurality of motor control units, a power supply interface and a communication interface are integrated on the control circuit board, and a first output end of the AC-DC power supply module is connected with the control board and is used for supplying power to the control board; one end of the data optical fiber transceiver is electrically connected with the optical fiber coupler, and the other end is electrically connected with the communication interface for converting the signal into an optical signal and outputting the optical signal. The control circuit board is placed in the shielding box, so that the size of the rotary table or antenna tower equipment is reduced, and the electromagnetic interference risk of a motor and a darkroom environment is reduced; the control circuit board integrates the servo motor control unit and the stepping motor control unit for modular design, serves as an independent unit of the darkroom test system, and is high in universality.

The invention belongs to the technical field of optical imaging and automatic detection, and particularly relates to a multispectral polarization imaging automatic scanning system. According to the system, through combination of multispectral polarization imaging and an AI algorithm, rapid positioning and classification of a target are realized, and the precision and efficiency of trace detection and material evidence identification are improved on the premise that a sample is not damaged. The multispectral polarization imaging automatic scanning system comprises a single-axis detachable slide rail, a polarization camera, a multispectral light source module, a small darkroom with an open bottom, a control panel and a main control computer. The two ends of the single-axis detachable sliding rail are supported by the adjustable tripod, the portable small darkroom is fixed below the movable end of the sliding rail through mechanical connection, the polarization camera and the multispectral light source are installed in the darkroom, and the darkroom is driven by the stepping motor to conduct single-axis scanning motion. The multispectral light source module supports switching of more than six wave bands within the wave band of 450-950 nm, wave band switching can be completed within 5 ms, and stable illumination intensity (0-500 lux) is provided. The process provided by the invention comprises the steps of equipment deployment, scanning path configuration, light source regulation and control, image acquisition, data analysis and the like, and a high-precision detection report can be quickly generated in various scenes. Through cooperative work of the control panel and the main control computer, the system realizes automatic image acquisition, target detection and report generation, is widely applied to the fields of trace detection, material evidence identification, industrial quality inspection and the like, and has the characteristics of automation, high efficiency and high precision.

The invention relates to the technical field of vehicle-mounted equipment testing devices, and discloses a vibration test evaluation method and device suitable for a long-focus wide-angle vehicle-mounted camera, a plurality of cameras to be tested are installed on a six-degree-of-freedom vibration table in a darkroom, and a position-adjustable test chart card and a light source system are arranged in front of the cameras; the driving module is adopted to lighten the camera, so that remote controllable shooting is realized; configuring a test environment, and adjusting parameters such as a graphic card position and illumination; driving a camera to shoot an image card under multiple working conditions, outputting an original image sequence, and driving a module to complete a traversal test; the driving module returns a shooting result to the image analysis module, and the image analysis module analyzes imaging quality in real time, evaluates indexes such as a modulation transfer function and motion blur, and generates a multi-dimensional optical performance report; generating a multi-degree optical dimension performance report of the camera; the technical problem that a real vehicle multi-degree-of-freedom direction vibration coupling scene cannot be simulated in the prior art is solved.

The invention discloses an LED dead pixel detection method, device and equipment based on laser reflection and a medium, and relates to the technical field of LED lamp detection, and the method comprises the steps: controlling a laser light source to irradiate a to-be-detected LED lamp; collecting a reflected light signal; preprocessing the reflected light signal to obtain an input signal; and judging whether the LED lamp is normal based on the input signal. According to the invention, laser reflection detection is adopted to replace traditional optical imaging, the monochromaticity and directivity of laser are utilized to overcome ambient light interference, and a darkroom or complex filtering is not needed. Meanwhile, the combination of the laser light source and the photoelectric sensor significantly reduces the cost of the system, and avoids the use of a high-resolution camera. The laser can focus a micron-sized light spot, and the sub-pixel-level micro structure abnormity can be identified with high precision by analyzing the energy change of a reflected light signal. More importantly, according to the method, non-luminous defects such as packaging cracks and colloid stripping can be synchronously detected by capturing the reflection characteristics of the physical structure of the LED instead of depending on the luminous state of the LED, so that the defect detection accuracy is effectively improved.

The invention provides a photoelectric solar irradiance meter self-calibration device for outdoor monitoring and a calibration method, and belongs to the technical field of photovoltaic monitoring. The device comprises a sky imager, a solar irradiance meter for monitoring, a standard solar irradiance meter, a sealed darkroom, a three-dimensional adjusting bracket and a waterproof sealed box, wherein a dual-channel temperature collector, a dual-channel voltage collector and a control, data processing and storage module are integrated in the waterproof sealed box. The sealed darkroom normally protects the standard irradiance meter to prevent the standard irradiance meter from aging and dust deposition; the dual-channel collector synchronously collects temperature and voltage of a standard solar irradiance meter for monitoring, and supports a calibration algorithm to realize dynamic updating of sensitivity; the three-dimensional adjusting bracket ensures that the device is parallel to the mounting plane of the photovoltaic module, and the angle response matching degree is improved; the sky imager judges the calibration weather condition to guarantee the effectiveness of the calibration environment; the control module realizes automation of a self-calibration process, adapts to an outdoor long-term monitoring scene, and realizes continuous and accurate measurement of photovoltaic solar irradiance.

The utility model relates to a limiting device used for adjusting the angle of a shielding door of a darkroom shielding room, and belongs to the technical field of shielding door angle limiting. The limiting device comprises a guide rod, a limiting block, a door leaf fixing piece, a door frame fixing piece and a pin shaft, the door leaf fixing piece is installed at the top of a door leaf, and the door frame fixing piece is installed on a door frame; one end of the guide rod is rotationally connected to the door frame fixing piece through a pin shaft, a penetrating groove is vertically formed in the middle of the guide rod in the length direction in a penetrating mode, the door leaf fixing piece is movably arranged in the penetrating groove, the limiting block is adjustably fixed in the guide rod, the door leaf fixing piece is arranged between the limiting block and the door frame fixing piece, and the door leaf fixing piece can abut against the limiting block. The door opening device is simple in structure and convenient to use, and a user can adjust the maximum door opening angle of the door at any time according to own needs; when the door reaches the limit position, the limit position of the door is well controlled due to the existence of the limiting device, and the door leaf is prevented from being damaged by touching other things.

The application relates to the field of artificial network control, in particular to an artificial network control method, device and system for shielding across a darkroom. By using a fiber link and an internal battery power supply architecture in a fully-closed shielding darkroom, the interference of personnel on a test environment is completely eliminated, monitoring of parameters such as internal temperature and voltage of the integrated darkroom is added, zero-crossing synchronization noiseless operation of phase switching is realized, in addition, user end environment adaptive identification, driving parameter dynamic calibration and equipment life prediction are realized, and the needs of high-precision, unattended automatic phase switching and testing are met.

The utility model discloses an LED lamp detection device which comprises a detection table, the top of the detection table is fixedly connected with a detection box, the top of the detection box is covered with a fixing cover, the top of the fixing cover is connected with a brightness meter in a penetrating mode, the bottom of the fixing cover is fixedly connected with a hanging bracket, the hanging bracket is fixedly connected with an LED installation base, and the LED installation base is fixedly connected with a light source. The beneficial effects of the utility model are that the LED lamp to be detected is firstly installed on the LED installation seat, then the lifting mechanism drives the fixed cover to close the detection box, the LED lamp on the LED installation seat extends into the detection box to carry out darkroom detection, then the LED installation seat is controlled to be electrified, and the LED lamp can be conveniently and rapidly detected. During illumination, the brightness meter can detect the brightness, the heat dissipation mechanism can dissipate heat generated by the LED lamp in the detection process, the structure is reasonable, the brightness of the darkroom can be conveniently detected, and operation is convenient.

The invention discloses a synthetic aperture radiometer darkroom phase calibration method and device. The method comprises the following steps: installing a synthetic aperture radiometer and a point target emission source in a microwave anechoic chamber; in the first-stage test, unit antenna output ports are connected with equal-length test cables and connected to a microwave test instrument, a synthetic aperture radiometer is set to be in an antenna observation mode, and a point target observation unit antenna phase difference test is carried out; in the second-stage test, the output end of the unit antenna is connected with each receiving channel of the synthetic aperture radiometer, the synthetic aperture radiometer is set to be in an antenna observation mode, and a point target observation full-system phase difference test is carried out; in the third stage of testing, the synthetic aperture radiometer is set to be in a common noise injection calibration mode, and common noise injection calibration is carried out; and calculating and counteracting a near field effect phase difference, a unit antenna phase difference and a receiver channel phase difference to obtain an accurate noise distribution network phase difference parameter. Darkroom phase calibration is achieved under the near-field condition, the result is accurate, and the method is simple, convenient and practical.

The utility model discloses an on-line intelligent fluorescent magnetic trace distinguishing mechanism, which relates to the technical field of fluorescent magnetic powder detection and comprises a darkroom, a first conveying rack, a first blanking rack, a second blanking rack and a second conveying rack. The first conveying rack transversely penetrates through one side of the darkroom and extends into the darkroom, a first conveying belt is installed at the top of the first conveying rack, and the first discharging rack and the second discharging rack are arranged on the front side and the rear side of the first conveying belt correspondingly; the top height of the first discharging rack and the top height of the second discharging rack are matched with the top height of the first conveying belt, and the second conveying belt is arranged on one side of the back face of the first discharging rack. According to the utility model, a magnetized workpiece containing magnetic traces can be quickly and conveniently subjected to magnetic trace detection treatment with higher detection accuracy and higher safety, so that the detection work is time-saving and labor-saving, higher in efficiency and higher in safety.

The present invention proposes a method and system for measuring the total radiation power of a 5G terminal in an active darkroom, which belongs to the field of 5G communication technology. It includes: a central processing unit sends a first instruction to a base station simulator, so that the base station simulator transmits a test signal for measuring the total radiation power of the 5G terminal, and the test signal is received by a 5G terminal placed on a two-dimensional turntable via a first antenna; after decoding the received test signal, the 5G terminal radiates the decoded test signal outward via its own antenna at a rated maximum transmission power, so that the second antenna continuously receives measurement data; a signal analyzer calculates the two-dimensional and three-dimensional directional patterns of the electromagnetic field based on the measurement data, and further determines the total radiation power of the 5G terminal. This method uses the gain directional patterns of the horizontal and vertical planes of the antenna to approximate the total radiation power TRP of the antenna, which improves the efficiency of the test and facilitates the realization and completion of automation.

The utility model relates to the technical field of radio frequency simulation, and discloses a darkroom wave-absorbing material overturning and resetting mechanism which comprises a main body assembly. The main body assembly comprises a U-shaped plate, and a plate body is arranged on the inner side of the U-shaped plate; the top of the plate body and the top of the U-shaped plate are both provided with the wave absorbing modules; a turnover assembly is arranged on the U-shaped plate, and the turnover assembly comprises two mounting plates which are fixedly connected to the inner side of the U-shaped plate and are symmetrically arranged; the device has the advantage of higher efficiency in use, when a test is needed, an operator drives the gear I to rotate through the driving mechanism, so that the gear I drives the rotating rod to rotate, the rotating rod drives the plate body to rotate, the plate body drives the wave absorbing module on the plate body to turn over, the moving mechanism passes through, and the wave absorbing module on the plate body is driven to move. After the test is completed, an operator controls the driving mechanism to drive the plate body to rotate reversely, re-laying is not needed, and the problem that re-laying is inconvenient after the test is completed is solved.

A blind hole guiding structural part for a gas hose comprises a guiding part A and a guiding part B. The guiding part A comprises a magnetic suction head A, and the magnetic suction head A is magnetic. The lower part of the magnetic suction head A is connected with a metal hose; a pipeline fixing hoop is arranged below the metal hose; the guide piece B comprises a magnetic suction head B, and a metal hose is arranged at the lower part of the magnetic suction head B. The gas hose blind hole guiding device solves the problem that in the prior art, a gas hose is inconvenient to penetrate through a blind hole, double assemblies penetrate through an open hole respectively, contact adsorption is conducted in a darkroom, the threading difficulty of the blind hole is lowered, the gas hose blind hole guiding device is particularly suitable for blind hole guiding in the multi-bending environment, and the effect of convenient operation is achieved.

The invention provides a hiding device for a test darkroom and the test darkroom. The top of the test darkroom is provided with a hiding parking area. The hiding device comprises a lifting mechanism, a turnover mechanism and a control system, and the lifting mechanism and the turnover mechanism can jointly form a closed wave-absorbing shielding surface through the control system so as to shield interference sources such as travelling vehicles in the hidden parking area. Driving or similar electromagnetic test interference sources can be effectively shielded and shielded, and the influence of the structure on the electromagnetic environment of the test darkroom is reduced.

The utility model relates to the technical field of film detection, in particular to a film defect detection device. The device comprises a film viewing cavity arranged in a darkroom, the film viewing cavity comprises a main cavity defined by baffles and a middle platform layer arranged in the main cavity, a light through hole is formed in the middle platform layer, a xenon lamp is installed at the top of an upper cavity so that light can irradiate a to-be-detected film at the light through hole, and a defect imaging curtain is laid at the bottom of a lower cavity so that the to-be-detected film can be detected. The shadow left by the thin film at the light through hole is received; light penetrates through the thin film, shadow is projected on the defect imaging curtain laid at the bottom of the lower cavity, due to the fact that the xenon lamp with higher light penetrating power is selected, slight deformation type defects of the thin film can be seen on the defect imaging curtain, the defects of an existing thin film defect observation mode are overcome, and the tiny and slight deformation type defects of the thin film can be seen.

This application relates to the field of display technology, specifically to a screen brightness adjustment method, apparatus, display device, and storage medium. The screen brightness adjustment method, applied to a display device, includes: acquiring first reflective brightness data of the display device in its current environment; determining the current environment type of the display device based on the first reflective brightness data; when the current environment type is a darkroom environment, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weighting coefficient; when the current environment type is a non-darkroom environment, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to a second brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data, thereby considering the reflective brightness of the environment when adjusting the screen brightness.

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 relates to an AI training multi-modal imaging-oriented glass defect data set acquisition device and method, and aims to solve the problems of inconsistent imaging quality, complex device structure and incapability of automatically constructing a high-quality multi-modal data set in the existing glass defect acquisition technology. The device comprises a darkroom structure, and a light source regulation and control module, a polarization regulation and control module, a spectrum regulation and control module, a diffuse scattering regulation and control module, a rotary loading platform and an imaging module which are integrated in the darkroom structure, and each module is controlled by a control unit in a coordinated manner; according to the method, a multi-dimensional parameter combination matrix is established, parameters are called in sequence to collect images and bind metadata, and a structured data set is output after image registration and fusion. According to the method, ambient light interference is inhibited through modular electric control design, the consistency and definition of defect images are improved, differentiated display of multiple types of glass defects is realized, a high-quality multi-modal data set with optical parameter labels is automatically constructed, and reliable data support is provided for AI defect detection model training.

The utility model relates to the technical field of darkroom gate control, and particularly discloses a darkroom gate control structure, which comprises a fixed plate, an overhead rail is fixedly mounted on the outer surface of the fixed plate, the fixed plate is fixedly mounted on the outer surface of a wall body, and an intelligent control networking panel is fixedly mounted on the outer surface of the wall body on one side of the fixed plate. According to the darkroom gate control structure, when a user needs to enter a darkroom, the user only needs to input a password through the intelligent control networking panel or recognize the face to control and start the servo driving motor, and the intelligent control networking panel records the information of the person entering the darkroom and uploads the information to the system; and the servo driving motor can drive the screw rod to rotate, so that the sliding block connected with the screw rod can move on the outer surface of the hanger rail to drive the door plate to automatically move, a user does not need to manually open the door plate when entering the darkroom, and identity information of the entering person can be recorded.

The invention provides an automatic test system and method for the dynamic scene projection quality of an intelligent vehicle lamp, and relates to the technical field of vehicle lamp projection detection. Comprising a test bench and a control device, and the test bench is provided with an intelligent vehicle lamp module and an image acquisition module and is arranged in a darkroom environment; control software and scene recharging software are integrated in the control device; through scene selection, camera position self-adaption, automatic focusing, projection triggering, sampling, data processing and quality verification, the problems of low precision, poor efficiency and narrow fixed camera application range of a traditional human eye test are solved, the automatic and precise test of the multi-dynamic scene projection quality of the intelligent vehicle lamp is realized, the method can be used for long-term stability test, and the blank in the field is filled.

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 a simple test method based on MIMO-OTA, and belongs to the technical field of wireless communication. The test method shields the air interface influence of OTA, and for multi-base station test, multi-terminal test or pull-out test, only the multi-base station or multi-terminal needs to be placed in an actual darkroom, then a corresponding topological structure is established according to actual test needs by using control software of a simulation instrument, a channel impulse response is generated in channel modeling software, and channel coefficients are loaded into a channel simulation instrument, so that OTA test can be realized, and the influence of the darkroom air interface on the test system does not need to be considered.

The application provides an AVM calibration method, comprising the following steps: determining at least one original calibration pattern in which corner point detection fails in a plurality of original calibration patterns laid around a vehicle and an original calibration pattern arrangement in which the at least one original calibration pattern is located; acquiring a redundant calibration pattern arrangement arranged at intervals with the original calibration pattern arrangement; performing a corner point detection algorithm on the original calibration pattern arrangement and the redundant calibration pattern arrangement to obtain corner points of a calibration pattern arrangement in which corner point detection succeeds in the original calibration pattern arrangement and the redundant calibration pattern arrangement, so as to calibrate AVM by using the corner points. The application also discloses a vehicle-mounted device and a storage medium. The application realizes the following advantages: without repeatedly adjusting light, without a special material calibration pattern and without constructing a darkroom and arranging controllable light sources, the operation process of AVM calibration is simple.

The utility model provides darkroom imaging equipment, which comprises a box body and an imaging module, the box body is provided with a darkroom space, the imaging module is arranged in the box body and is used for imaging a blotting membrane in the darkroom space, the box body is provided with an upper cover, a base and a cover closing detection device, and the upper cover can be opened and closed relative to the base. And the cover closing detection device is arranged on at least one of the base and the upper cover and is used for detecting whether the upper cover is closed or not. Whether the upper cover is closed or not is detected through the cover closing detection device, and the possibility that the upper cover is not closed tightly can be reduced.

This invention relates to a high-speed optical system designed for the S35 sensor, specifically an optical system for a 40mm / f0.85 high-speed lens for S35 (24.6x13.8mm) sensor camera. Currently, it represents the largest aperture lens in mass production on the market. The lens structure comprises 10 optical glass elements, including a first lens group, an aperture stop, a second lens group, and a third lens group arranged along the optical axis from the object side to the image side. The first and second lens groups are fixed lens groups, while the third lens group is a movable lens group that can move along the optical axis. This invention, targeting a large aperture optical system of 40mm f / 0.85, achieves mass production while ensuring low distortion and maintaining high resolution at full aperture. It can be used for image capture and video surveillance in extremely low-light environments and can be widely applied in darkroom biochemical reaction observation, solar panels, simulated space darkrooms, and special-requirement night vision devices.

The invention discloses contact type imaging equipment, which comprises a shell, a CMOS (Complementary Metal Oxide Semiconductor) chip detector and an optical fiber panel, a darkroom space is arranged in the shell; the CMOS chip detector is located in the shell, the CMOS chip detector comprises a pixel array, the pixel array comprises a plurality of pixels distributed in an array mode, and the pixel array is used for converting optical signals into images of detected samples; the optical fiber panel is attached to the top surface of the CMOS chip detector, and a detected sample is arranged on the optical fiber panel. The optical fiber panel is arranged on the CMOS chip detector, so that the imaging effect is not affected while the detector is protected.

The present invention belongs to the technical field of radar absorbing material testing, and proposes a high- and low-temperature controllable reflectivity testing device and method for radar absorbing materials, comprising a microwave darkroom, a detection mechanism and a test object placement mechanism arranged in the microwave darkroom, and a temperature control mechanism; the detection mechanism comprises a first bracket arranged in the microwave darkroom, and a transmitting antenna and a receiving antenna arranged on the first bracket; the test object placement mechanism comprises a second bracket arranged in the microwave darkroom, and a cover body arranged on the second bracket for placing the test object; the temperature control mechanism comprises a temperature control box, and an air inlet duct and an air return duct connected to the temperature control box; the ends of the air inlet duct and the air return duct away from the temperature control box are both connected to the interior of the cover body, and the air volume and wind speed entering the cover body are controlled by the temperature control box, so that the temperature and humidity inside the cover body meet preset requirements, can simulate a real environment, and the setting of the cover body can ensure the uniformity of heating of the test material.

The application discloses a kind of measuring camera image high dynamic range device and method, it is provided with optical darkroom, wide dynamic light source, lens and host computer, wherein lens is installed at the opening of optical darkroom, wide dynamic light source is installed in optical darkroom inside facing lens, and wide dynamic light source includes LED lamp group and time sequence control circuit module;The target surface of the scientific camera to be measured is connected with lens, and host computer is connected with the scientific camera to be measured to establish control connection and data connection;Host computer starts the scientific camera to be measured and sends measurement start instruction to time sequence control circuit module in wide dynamic light source, time sequence control circuit module starts LED lamp group and controls the light-emitting duration of each LED lamp, after the image is photographed to the scientific camera to be measured, it is uploaded to host computer, and host computer obtains the dynamic range of the scientific camera to be measured by detecting the number of LED light spot in image.This application obtains dynamic range by analyzing the image that the scientific camera to be measured is photographed to wide dynamic light source, effectively improves dynamic ratio measurement range.

The application discloses an array phase measurement method based on motion trajectory fitting. In view of the high-precision phase measurement requirement of target detection, the geometric position relationship generated when a signal source moves relative to a phased array antenna is utilized, prior information that the motion geometry of the signal source is a straight line model is utilized, and the array phase is measured based on motion trajectory fitting. The measurement of the phase offset can be realized through the algorithm, and the traditional darkroom calibration method is no longer needed, so that the test process is simplified while the cost is saved, and the method is suitable for large-scale use and popularization in industry.