396 results about "Dark room" patented technology

The invention discloses an electronic communication cable detection device in the technical field of cable detection, and the device comprises a workbench, an insulation tester and a dielectric loss tester, the workbench is provided with a darkroom, the axial side wall of the darkroom is symmetrically provided with ports, the ports are internally and fixedly connected with window shades, and the interior of the darkroom is fixedly connected with a defect detection assembly. A roller assembly is fixedly connected to the outer side wall of the darkroom, multi-stage clamping assemblies located on the two sides of the darkroom are symmetrically and fixedly connected to the top of the workbench, a controller is fixedly connected to the workbench, and the flaw detection assembly, the roller assembly, the multi-stage clamping assemblies, the insulation tester and the dielectric loss tester are all in signal connection with the controller. According to the invention, through multi-stage screw-in self-adaption to cables with different diameter specifications, the clamping stability is ensured, and the pressure sensor cooperates with the electrical performance detection instrument and the camera to integrate various detections, so that the detection cost is reduced, the detection accuracy is improved, and the cable to be detected is prevented from being damaged in the detection process.

The invention discloses a satellite loop simulation test system and method, electronic equipment and a program product. The satellite loop simulation test system comprises a darkroom system used for simulating an electromagnetic propagation environment between a satellite and a terminal; the turntable system is deployed in the darkroom system and is used for controlling the terminal to move in the darkroom system according to the input terminal movement track; the communication system is used for sending a downlink test signal to the terminal and receiving an uplink test signal fed back by the terminal according to the input channel simulation file, and the uplink test signal and the downlink test signal are used for determining a test result of the satellite loop simulation test; and the timing system is used for generating a unified time reference for the turntable system and the communication system, and the turntable system and the communication system operate based on the time reference. The technical problem of how to construct a darkroom test environment in a low-orbit broadband satellite high-speed motion scene so as to verify the end-to-end communication performance of a terminal under a real-time tracking satellite is solved.

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 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 field of electromagnetic field technology and radio frequency signal testing, in particular to a radio frequency standard field generation system and method based on near-field beam forming, and the system comprises a control unit, a radio frequency signal generation unit, a radio frequency field control unit and a broadband radiation antenna array. The control unit carries a near-field electromagnetic wave synthesis mathematical model and is used for receiving a target field type setting requirement and calculating excitation amplitude and injection compensation phase required by each radiation unit configured in the broadband radiation antenna array; the radio frequency signal generation unit comprises a pulse modulation laser source and a plurality of semiconductor radiation units and is used for generating high-power programmable radio frequency signals; the radio frequency field control unit comprises an optical delay line and an FPGA matrix and is used for performing amplitude and phase regulation and control on the high-power programmable radio frequency signal output by the radio frequency signal generation unit; and the broadband radiation antenna array is used for receiving the regulated radio frequency signal and radiating the regulated radio frequency signal to the near-field space of the darkroom, and a target field pattern is formed through multi-unit electric field vector superposition.

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 discloses an isolator for establishing a bone nonunion animal model and a preparation method of the isolator, and relates to the technical field of medical instruments, and the preparation method comprises the following steps: step 1, obtaining a hydrogen-containing silicone oil prepolymer with a side chain containing Si-H bonds; 2, obtaining a silica gel macromonomer with an epoxy group on a side chain; step 3, obtaining an anti-inflammatory functionalized silica gel macromonomer; 4, reconstructing the skeleton model in a three-dimensional manner, and creating a defect isolator model; 5, adding the anti-inflammatory functionalized silica gel macromonomer obtained in the step 3 and a reactive diluent into a mixing tank, adding a cross-linking agent and polyether modified polydimethylsiloxane under mechanical stirring, stirring for 30 minutes, defoaming for 2 hours under 500Pa vacuum, and standing and curing in a darkroom after defoaming; and 6, a multi-material-box DLP photocuring 3D printer is adopted for isolator printing. According to the method, observation interference on the bone nonunion pathological process is fundamentally reduced, and high-fidelity modeling construction is achieved.

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.

The invention discloses a high-precision weak light detection or communication test system, which comprises a laser power controller, a function generator, a transmitting end microcontroller, a shielding box, a source meter, an oscilloscope, a trans-impedance amplifier, a receiving end microcontroller and a computer, a laser light source, an attenuator, a standard device, a test device, a spectroscope, a screw rod, a first sliding table, a second sliding table and a stepping motor are arranged in the shielding box; the laser light source and the attenuator are fixed on the first sliding table, the spectroscope is fixed on the second sliding table, the first sliding table and the second sliding table are arranged on the lead screw, the lead screw is connected with the stepping motor, the attenuator and the stepping motor are connected with the transmitting end microcontroller, the standard device and the testing device are arranged on the side wall of the shielding box, and the attenuator is located between the laser light source and the spectroscope. The standard device is connected with the source meter, and the trans-impedance amplifier is connected with the receiving end microcontroller; the spectroscope is used for irradiating the laser beam on the test device and the standard device, and the shielding box is used for shielding electromagnetic interference and providing a darkroom environment.

The application discloses a kind of photovoltaic module dark current testing device, it is related to dark current detection device technical field, the detection device includes workbench, workbench is placed with cabinet, multiple drawers are slidably installed on cabinet, multiple current detection modules are evenly installed in drawer, workbench is installed with host computer, host computer is electrically connected with current detection module, temperature and humidity control assembly is provided on the cabinet, temperature and humidity control assembly adjusts the temperature and humidity inside cabinet, when drawer is completely pushed into cabinet, darkroom for accommodating photovoltaic module is formed, meet the lightless environment requirement of photovoltaic module dark current test, improve detection precision, host computer as the overall control unit of device forms the closed-loop control of "instruction issue-data acquisition-result feedback", display screen connected with host computer real-time display test state, real-time parameter and test result, replace artificial reading judgment, reduce error.

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.

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.

A system performs a method of verifying an anechoic chamber. A plurality of electromagnetic waves propagate from an emitter located within the anechoic chamber. Each electromagnetic wave of the plurality of electromagnetic waves is associated with one of a plurality of configurations between the transmitter and a receiver in the anechoic chamber. A plurality of reflections from a reflective element in the anechoic chamber are received at the receiver. Each of the plurality of reflections corresponds to one of a plurality of configurations. For each of the plurality of reflections, an ellipse indicative of a range of reflective elements is determined. The intersection of each ellipse is positioned to determine the position of the reflective element in the anechoic chamber. The reflectance of the reflective element is compared to a threshold to validate the anechoic chamber.

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.

The application relates to a navigation terminal comprehensive performance test evaluation method based on a microwave darkroom, and belongs to the technical field of satellite navigation. The application simulates the use conditions and various scenes possibly encountered by a navigation terminal in actual use for testing by constructing a navigation terminal comprehensive performance test platform based on a microwave darkroom and constructing a navigation terminal comprehensive performance test scene, and performs comprehensive performance evaluation according to positioning / short message communication information reported by the navigation terminal. The application simulates the scenes possibly encountered by the tested terminal in actual application through a comprehensive test scene formed by multiple application scenes, the test result is closer to the actual application, and the application has good actual application value.