374 results about "Darkroom" patented technology

The invention discloses a combustible liquid limit oxygen concentration testing device and method, and the device comprises an electrolyte supply system which comprises a height-adjustable placement platform and a constant-pressure liquid supply module; the combustion system comprises a base and a combustion tube, a partition plate is fixedly connected to the middle position in the combustion tube, an ignition module is detachably connected to the center position of the top face of the partition plate, a lampwick tube is arranged in the ignition module, a lampwick is arranged at the top end of the lampwick tube, and rectification modules are arranged on the top face of the partition plate and the inner bottom of the combustion tube correspondingly; an experimental darkroom is mounted on the top surface of the base; a gas inlet pipe is mounted at the bottom of the combustion pipe; the gas distribution system is connected with the control system; the optical measurement and analysis system is mounted in the experimental darkroom; a waste liquid recovery module is installed at the bottom of the base. A discharge pipe is installed at the bottom of the combustion pipe. The constant-pressure liquid supply module can ensure that electrolyte with stable pressure is provided for the lampwick tube, and the accuracy and repeatability of a test result are ensured.

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 provides a low-scattering carrier for darkroom background level evaluation test, and relates to the technical field of target far-field electromagnetic scattering characteristic test, the low-scattering carrier is a hollow structure formed by seamless connection of an upper surface and a lower surface; the upper surface comprises a plurality of smooth curved surfaces with continuous curvatures, and the lower surface is a smooth plane; the forward direction of the low-scattering carrier is a sharp needle-shaped tip; and the lower surface is provided with a circular truncated cone hole for embedding a two-dimensional rotating top at the top end of the metal bracket and a connecting structure for connecting and fixing the two-dimensional rotating top. The forward direction of the low-scattering carrier provided by the invention is a sharp needle-shaped tip, so that the low-scattering carrier can be ensured to have a low-scattering characteristic in a relatively wide angular domain range in the forward direction, strong RCS scattering of the two-dimensional rotating top can be shielded, the RCS of the metal bracket can be measured more accurately, and a more accurate darkroom background level can be further obtained.

The invention discloses an inter-plant mechanical weeding system and method for transplanted crops, and the system comprises an imaging system which comprises an imaging darkroom; the illumination system is located in the imaging darkroom and comprises a plurality of LED lamps; the weeding knife system is located on the rear portion of the imaging darkroom and comprises a servo electric cylinder, a rolling sliding rail and a weeding blade, and the servo electric cylinder drives the weeding blade to horizontally move on the rolling sliding rail when executing actions so as to achieve avoiding of crop plants and inter-plant weeding; the GNSS positioning system is used for acquiring the position information of the current device in real time; the crawler-type chassis system is used for enabling the system to advance according to a planned route; the power distribution control box comprises a power supply, a single-chip microcomputer and a microcomputer which are arranged in the power distribution control box. According to the system and the method, crops can be accurately positioned, the weeding efficiency is improved, the system and the method can be popularized to crop transplanting, and sustainable agriculture can be realized.

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 relates to the technical field of colorimetric analysis instruments and equipment, and particularly discloses a portable multi-light-source colorimetric analyzer and method based on an intelligent mobile platform, and the analyzer comprises colorimetric analysis software which is used for setting collection parameters, collecting sample images and analyzing sample data; a sample solution is arranged in the sample analysis darkroom module assembly, and the sample analysis darkroom module assembly is used for shielding external light interference; the light source module provides a light source for the colorimetric analyzer and is convenient for collecting sample color parameters; the cuvette is used for containing a sample solution; the intelligent mobile equipment is used for carrying out information acquisition on the sample; and the light path lens module is used for collimating and filtering the light source. The color signals in the sample detection process are captured by the camera of the intelligent mobile equipment, and the chromaticity information is quantified in combination with corresponding colorimetric analysis software, so that on-site, real-time, rapid and quantitative sample parameter detection can be realized, the detection operation difficulty in a laboratory is reduced, the method is suitable for multi-model Android intelligent equipment, and the detection efficiency is improved. And detection personnel can conveniently go out for operation.

The invention relates to the field of satellite navigation, and discloses a satellite receiving terminal-oriented babysbreath microwave anechoic chamber and outdoor environment collaborative test system and method, and the system comprises a babysbreath microwave anechoic chamber, an unmanned plane platform, and a standard satellite positioning terminal disposed in the babysbreath microwave anechoic chamber. The tested satellite receiving terminal and the carrier are arranged in an outdoor environment, the upper computer is arranged outside the babysbreath microwave darkroom, and the satellite navigation signal simulation source and the GNSS time service module are arranged in the babysbreath microwave darkroom and on the unmanned aerial vehicle platform. According to a parameter instruction issued by the upper computer, the satellite navigation signal simulation sources of the babysbreath microwave anechoic chamber and the unmanned aerial vehicle platform generate satellite navigation signals used for testing a satellite receiving terminal, and the satellite navigation signals are broadcasted through respective navigation antennas. According to the invention, an indoor and outdoor collaborative test environment is effectively constructed, the test requirements of large equipment under the condition of no large darkroom are met, and the comprehensiveness and scientific rationality of test results are ensured.

The invention discloses a spectral data correction method, a substance analysis device and a digital twin system of the substance analysis device, and belongs to the technical field of lunar surface exploration. The device integrates multiple functions of element acquisition, spectral analysis, temperature compensation, weight measurement, high-definition image acquisition, three-dimensional shape reconstruction and the like, and by designing a special darkroom structure and a temperature control module, the influence of the extreme temperature of the lunar surface and stray light on the measurement precision is effectively avoided. The device adopts a Raman spectrum sensor and an infrared spectrum sensor to realize substance component detection, and corrects measurement errors caused by temperature fluctuation in real time through multispectral data preprocessing and a nonlinear temperature compensation model. Meanwhile, the multi-view image acquisition and high-density morphology reconstruction technology ensures the accurate restoration of the surface morphology and color information of the sample; the digital twin subsystem realizes remote monitoring and dynamic optimization through real-time data synchronization and virtual simulation, and improves the detection efficiency and decision precision.

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 utility model discloses an automatic whole plant phenotype imaging system, which comprises an imaging darkroom provided with a channel penetrating through the imaging darkroom, and two ends of the channel are respectively provided with a room door; the conveying mechanism is arranged in the channel; the loading box is arranged on the conveying mechanism and can be driven to move in the extending direction of the channel, a plurality of cultivation boxes are arranged in the loading box, and one side of each cultivation box is a transparent side wall; the moving mechanism is arranged in the imaging darkroom; the first phenotype imaging mechanism is arranged in the imaging darkroom and faces the detection position; the second phenotype imaging mechanism is arranged in the imaging darkroom and faces the detection position; and a control mechanism. According to the utility model, the phenotype of the whole plant can be automatically detected, and the data information of the root system and the plant is in one-to-one correspondence every time, so that the corresponding different forms of the root system and the plant in different periods can be fully reflected.

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 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 an optical absorption coating with a multi-stage nested structure and a preparation method of the optical absorption coating, and particularly relates to an optical absorption coating with a multi-stage nested cross-scale structure, a preparation method of the optical absorption coating and a method for enhancing substrate interface adhesion of the optical absorption coating. The super cross-linked structure of the light absorbing material precursor is utilized to form a nano-micron multi-stage nested pore structure, so that the reflectivity is reduced, and the light absorptivity of the coating in a broadband range is improved; meanwhile, by regulating and controlling different component proportions, curing time and temperature and coating modes of film forming materials and carbon-based light absorbing materials in the coating, an excellent light trapping structure is formed on the surface of the coating, and the surface adhesion of a substrate is improved. The optical absorption coating provided by the invention is wide in substrate selectivity and excellent in interface adhesion performance, has the absorptivity of 99.0% at the wavelength of 400-2000nm, and is suitable for optical components, baffles, light shields, inner walls of lens cones, darkrooms and other systems and parts needing to eliminate stray light.

1. Name of the Design Product: Absorber for Dark Room (DSH-600). 2. Use of the Design Product: This design product is used for installing in an EMC dark room or a microwave anechoic chamber to absorb electromagnetic waves. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

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 method for testing the phase deflection characteristics of the phased array antenna element channels proposed by the present invention is simple, reliable, consumes little hardware resources, and is easy to implement. The present invention is realized through the following technical solutions: Step 1, test preparation: First, perform spatial position calibration; Step 2, phase center test: Send the transmit trigger signal generated by the antenna test control system to the signal source through an optical fiber, and find the phase center of the antenna element to be tested through the method of the darkroom experiment turntable to form up and down beam patterns; Step 3, deflection phase characteristic test: Use the three-dimensional adjustment mechanism to rotate the turntable of the darkroom experiment on each axis, and send the received data of all receiving channels to the data acquisition unit in the test control system respectively, measure the actual phase center and phase deflection characteristics of the antenna element, find the phase deflection characteristics of the antenna element, draw the phase deflection characteristic diagram of the antenna element according to the azimuth angle and elevation angle of deflection, and correct the channel phase of the antenna element of the phased array based on this.

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.

The present application provides a performance testing device and method. The device includes: a generator, a receiver, and a vehicle-end sensing module. Among them, the transmitting antenna of the generator, the receiving antenna of the receiver, and the vehicle-end sensing module are placed in a darkroom. The generator emits a set field strength through the transmitting antenna. The receiver receives the field strength through the receiving antenna and verifies whether the field strength emitted by the transmitting antenna is the set field strength. The vehicle-end sensing module senses the field strength emitted by the transmitting antenna to obtain a sensed field strength. Based on the mapping relationship between the field strength and the distance, the sensed distance corresponding to the sensed field strength is determined, and the sensed distance determined by the vehicle-end sensing module at the current antenna angle is output. This device can quantitatively test the distance sensed by the vehicle-end sensing module under variable field strength conditions.

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 discloses a pitching assembly of a low-scattering metal support. The pitching assembly comprises a stand column supporting base, a pitching rail car and a hydraulic oil cylinder. The stand column supporting base is connected with the pitching rail car through a rotating shaft. The lower end of the hydraulic oil cylinder is fixedly installed on the pitching rail car through an oil cylinder pin shaft, and the upper end of the hydraulic oil cylinder is fixedly connected with the stand column supporting base through the oil cylinder pin shaft. The pitching assembly is higher in pitching speed, larger in force, better in stability and lower in failure rate, and the working efficiency is greatly improved; the pitching transmission structure is more compact, the occupied space is smaller, and the construction cost of the darkroom is greatly reduced; and the working state is locked and adjusted more simply, and the operation cost is lower.