37 results about "Dark chamber" patented technology

This invention discloses an electromagnetic characteristic testing method for a large-scale vacuum anechoic chamber plasma environment, belonging to the field of microwave testing technology. The method includes: setting up an antenna movement device, an antenna protective cover, and a transmitting antenna in a large anechoic chamber; evacuating the large anechoic chamber to a vacuum and providing a stable plasma environment through a plasma source inlet within the chamber; connecting the transmitting and receiving antennas to a vector network analyzer; connecting the vector network analyzer to a computer; and using the computer to control the vector network analyzer to acquire antenna data in the large-scale vacuum anechoic chamber plasma environment, calculating the gain pattern and transmittance. This invention provides a stable large-scale anechoic chamber plasma environment, ensuring the repeatability of electromagnetic characteristic testing. The antenna movement device ensures that the movement state of the receiving antenna at every angle can be obtained, enabling rapid and large-scale acquisition of stable plasma antenna data.

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

The present invention relates to an apparatus (100) for the detection of at least one target analyte in a sample to be analysed applied to a diffractive sensor (1), including a housing (101) delimiting within it a dark chamber (102); a support device (105) suitable for supporting and integrally holding the diffractive sensor (1), said support device (105) being movable within the dark chamber (102) and between the inside and outside of the dark chamber (102); a source (103) of laser light suitable for emitting laser light with a wavelength within the visible spectrum in the darkroom (102); a screen (107) arranged in the dark chamber (102); a vision system (111) configured to capture images on the screen (107); and a control unit operatively connected to the laser source (103), the support device (105) and the vision system (111).

The novel uniform light guide structure comprises a shell, a substrate, an LED light source and a light guide ring, the substrate is arranged in the shell, the LED light source is arranged on the substrate, the light guide ring is arranged on the shell, the inner end of the light guide ring is arranged above the LED light source, the shell comprises an upper cover, a main body and a base, and the upper cover is arranged on the main body. The upper cover is arranged above the main body in a covering manner, the main body is arranged on the base in a sleeving manner, a lightproof darkroom is formed between the main body and the base, and the substrate and the LED light source arranged on the substrate are arranged in the darkroom. And the light source is guided to the light guide ring through the light guide part, so that the light emitted by the LED is uniformly irradiated to the annular light emitting surface through a smaller space, and the beneficial effect of avoiding the problems of light leakage and light channeling is achieved.

The application relates to a kind of AR light machine field angle measurement methods based on camera calibration, comprising the following steps: preparing a black and white grid calibration board;Change the distance between calibration board and camera, so that the distance between them is greater than 10 times the focal length of camera;Transform the position of calibration board, repeat the direct imaging of calibration board by camera;Remove the calibration board, do not change the position and parameters of camera, control the direct projection of black and white grid image by AR micro display system;Adopt darkroom shooting mode, camera directly images light machine target;Through Zhang Zhengyou calibration method, the image of calibration board and the projected black and white grid image are calibrated and corrected, according to the calibration result, the focal length of camera at this time is recorded as f0;Image processing is carried out on the corrected image, the diagonal line size h of the image is obtained, and the diagonal line size is brought into the curve formula h=2f0·tanω of field angle-image height, and the measured field angle 2ω is directly solved.

This invention discloses a flat, compact field device with arbitrary aperture-to-height ratio. The device mainly consists of a flat, compact field aperture, a collimated flat plane wave quiet zone, and a feed source. The aperture-to-height ratio is arbitrary, but is recommended to be greater than or equal to 2. This invention also discloses a low-frequency limit design formula for arbitrary flat, compact fields. The low-frequency limit is determined by the aperture type, narrow-side electrical dimensions, and aperture-to-height ratio. A diagonal feed layout is recommended for flat reflector compact fields, which reduces the three-dimensional angle of the reflector towards the feed source, lowers the illumination level of the feed source on the reflector, thereby reducing the taper of the quiet zone amplitude and improving the aperture utilization rate of ultra-large flat, compact fields to 67%. The flattened compact field aperture reduces the aperture size and the height of the shielded anechoic chamber, reduces the self-weight deformation of the high-precision reflector, facilitates the engineering implementation and cost control of ultra-large compact fields, and ensures high-frequency and low-frequency limit performance.

This invention proposes a flow field visualization experimental device and method based on *Noctiluca scintillans* biosol, belonging to the interdisciplinary field of fluid mechanics experimental measurement and bio-optics. It addresses the shortcomings of existing flow field measurement technologies in terms of economy, safety, adaptability to complex boundaries, and engineering applications of biological tracer media. It includes a biosol culture module, a flow field experimental module, a bioactivity recovery module, a biosol storage tank, and a bioactivity calibration unit. The biosol culture module includes an LED light source and *Noctiluca scintillans* culture dishes. The flow field experimental module includes an experimental flow channel, imaging equipment, and a flow field excitation model arranged in an experimental dark chamber. The bioactivity recovery module includes a light-shielding tank. The biosol storage tank is connected to the light-shielding tank. The *Noctiluca scintillans* culture dishes, experimental flow channel, and light-shielding tank are equipped with bioactivity calibration units for detecting the emission peak value of the *Noctiluca scintillans* solution. It is mainly used for flow field visualization experiments.

The invention belongs to the technical field of nondestructive testing, and discloses a method for determining defects through translation secondary radiography of a contrast reference object, which specifically comprises the following steps: S1, appearance inspection; s2, preparing for radiographic inspection; s3, training the ray machine; s4, performing ray shooting inspection; s5, processing the film in a darkroom; and S6, negative film evaluation. The method has the advantages of simplicity, convenience and rapidness, realizes defect depth measurement, can be well applied to practical engineering, and efficiently guides practical work.

The invention belongs to the field of stray light suppression, and particularly relates to a stray light suppression capability test system, which comprises a stray light simulation source for emitting stray light, and a stray light incident angle adjustment module, a pose adjustment module, an irradiation detection module, an environment detection module, a background extinction cavity and a stray light suppression module which are respectively arranged in an optical camera obscura, the stray light incident angle adjusting module is used for adjusting the angle of stray light entering the optical camera obscura; the pose adjusting module is used for adjusting the pose of the optical system to be measured; the irradiation detection module is used for measuring the irradiance at a light inlet of the optical system to be measured; the environment detection module is used for measuring environment stray light energy in the field of view of the to-be-detected optical system; the background extinction cavity is used for absorbing residual stray light in a view field of the optical system to be detected; and the stray light suppression module is used for absorbing residual stray light outside the field of view of the to-be-detected optical system. Through the systematic innovative design, the precision, efficiency and reliability of the stray light suppression capability test of the optical system are comprehensively improved.

This utility model discloses a curing device for solar cells, including a variable-temperature dark chamber, a curing stage, and a curing lamp. Both the curing stage and the curing lamp are disposed within the variable-temperature dark chamber, with the curing lamp positioned above the curing stage. The curing device also includes a threaded movable bracket and a telescopic cylinder. The telescopic cylinder is fixed to the top of the variable-temperature dark chamber and located above the curing stage. The threaded movable bracket is connected to the telescopic cylinder and includes a screw, on which the curing lamp is mounted. This utility model allows for coarse and fine adjustments to the distance between the curing lamp and the curing stage using the telescopic cylinder and the threaded movable bracket, thereby adjusting the irradiation area of ​​the curing lamp. This enables the curing device to be applied to the curing of solar cells of different sizes. Simultaneously, the telescopic cylinder can drive the curing lamp to press down onto the surface of the solar cell, lightly touching and pressing the silicon wafer to inspect for microcracks.

The utility model discloses imaging equipment which comprises a shell, the shell comprises a first cavity, the first cavity is a darkroom space and can be opened or closed, an imaging assembly is arranged in the first cavity and used for converting optical signals generated by a detected sample into images, the shell further comprises a second cavity, and the imaging assembly is arranged in the second cavity and used for converting optical signals generated by the detected sample into images. The second chamber is arranged below the first chamber, a control mainboard is arranged in the second chamber, the control mainboard is in signal connection with the imaging assembly, the shell is further provided with an external port, the external port is electrically connected with the control mainboard, and the external port is used for enabling the imaging equipment to be in operable connection with external equipment. According to the imaging device, the control mainboard is arranged to enable the imaging device to be in operable connection with the external device, the imaging device can be debugged in real time according to the displayed image, various parameters can be conveniently adjusted, and an operator can conveniently select a proper operation mode according to own operation habits or operation environments.

This application provides a terahertz three-temperature testing system, relating to the field of automated testing technology. The system includes: a microwave dark chamber, a power-dividing waveguide assembly, a waveguide adapter assembly, a frequency up / down converter assembly, and an RF switching switch. A test probe is disposed at the center of the inner side wall of the microwave dark chamber, and a waveguide and a waveguide adapter structure are disposed on the top of the microwave dark chamber. The power-dividing waveguide assembly is disposed on the outer wall of the microwave dark chamber, opposite the test probe, and aligned with and connected to the waveguide. One end of the waveguide adapter assembly is connected to the waveguide adapter structure, and the other end is connected to the frequency up / down converter assembly. The frequency up / down converter assembly is connected to the RF switching switch, and the RF switching switch is connected to external testing instruments. This terahertz three-temperature testing system achieves the application requirements of high efficiency, small size, and high stability.

The invention discloses a modularized reflector array ultra-wideband plane wave synthesis system. The system comprises a microwave darkroom, a feed source array and a reflector array, wherein the feed source array and the reflector array are arranged in the microwave darkroom. The feed source array comprises N ultra-wideband feed source antennas, the N ultra-wideband feed source antenna units are arranged at equal intervals to form the feed source array, the main reflecting surface array is located in the middle of one side of the anechoic chamber, and the M main reflecting surface units are tightly arranged to form the main reflecting surface array. The plane waves formed by the M main reflecting surface units are synthesized into large-size plane waves, and a large-size measurement quiet zone is formed. According to the invention, a complex antenna array feed network is reduced, the insertion loss is greatly reduced, the system complexity is reduced, amplitude-phase errors caused by factors such as manufacturing processes and installation processes of a power division PCB and an independent power division PCB are eliminated, and the antenna has the advantages of high aperture utilization rate, low processing difficulty of a reflecting surface, low manufacturing cost and the like; the method is especially suitable for measurement of large-size targets.

A method for performing a lateral flow assay is provided. The method includes inserting a sample cartridge in a dark chamber and activating a light emitter in the dark chamber. The method includes focusing an optical coupling mechanism in an image-capturing device to optimize an image of a sensitive area in the sample cartridge and capturing, with an image capturing device, an image of a sensitive area in the sample cartridge after a selected period of time. The method also includes providing the image of the sensitive area to a processor, wherein the processor comprises an image-capturing application. A system and a computer-implemented method to perform at least partially the above method are also provided.

The utility model discloses a movable wave-absorbing shielding darkroom, which relates to the technical field of shielding rooms and comprises a shielding room main body, supporting legs are fixedly mounted at the bottom of the shielding room main body in a symmetrical structure, and a first supporting plate is connected between the supporting legs below the shielding room main body in a buckling manner. Universal pulleys are rotationally connected to the bottoms of the first supporting plate and the second supporting plate in a symmetrical structure, and auxiliary pulleys are arranged at the bottoms of the first supporting plate and the second supporting plate and located on the inner sides of the universal pulleys. When the shielding room main body needs to be moved, the whole moving device is firstly carried to the lower part of the shielding room and is positioned in the middle of the supporting legs, the universal pulleys can rotate towards multiple directions, the auxiliary pulleys play roles in auxiliary supporting and stable movement, and the shielding room main body can be moved according to actual requirements. The moving device can be selectively left at the bottom of the shielding chamber main body, so that subsequent re-movement is facilitated; and the moving device can be moved away from the bottom of the shielding room body, so that the device can be used for moving other types of shielding room main bodies.

The utility model belongs to the technical field of antenna testing, and discloses an antenna rapid test translation stage, which comprises a mounting base and a support frame, the front side of the support frame is fixedly connected with a rotation driving device, the two sides of the top surface of the mounting base are fixedly connected with sliding rails, the sliding rails are slidably connected with a plurality of sliding blocks, and the sliding blocks are fixedly connected with the support frame. The supporting frame is fixedly connected to the tops of the multiple sliding blocks, a horizontal driving mechanism is further connected between the mounting base and the supporting frame, the driving end of the rotary driving device faces the front side and is detachably connected with a flange frame, and the portion, located outside the rotary driving device, of the supporting frame is detachably and fixedly connected with a protective shell. By adopting the design of double sliding rails, the driving motor can drive the driving screw to rotate, the driving screw rotates to drive the driving block and the supporting frame to slide stably, then a product to be tested is stably pushed into the dark box and the dark chamber, the mounting base is conveniently mounted on the dark box wall or the dark box side wall, the structure is stable and reliable, and production and assembly are convenient.

The invention discloses a phased-array antenna beam forming test method in a darkroom-free environment, and relates to the technical field of satellite communication terminal complete machine testing, comprising the steps of initializing test system configuration, setting test parameters, initializing an antenna state, establishing a test environment, and connecting a test antenna with a channel simulator; cross coupling of non-corresponding channels is isolated and reduced through an algorithm, a signal transmission link between a test antenna and a tested antenna is established through a wireless channel by adopting a virtual wire connection mode, non-contact test is realized, beam forming test is performed, a mobile station moves to a preset test area, impedance of the test antenna is adjusted by adopting an electronic tuning mode, and the antenna is tested. The beam former realizes independent control of an uplink and a downlink, analyzes a test result and generates a report, does not need to depend on fixed test facilities such as a microwave anechoic chamber and a calibration tower, can directly test in an actual working scene, and is particularly suitable for field test of mobile equipment such as a large vehicle-mounted phased array system.

The present application relates to a kind of microwave darkroom static area automatic acquisition method, microwave darkroom static area is under the static area of reflectivity level and amplitude unevenness;The static area under reflectivity level is obtained using initial seed point selection algorithm and growth algorithm;The automatic acquisition of amplitude unevenness index range is based on the reflectivity level range, by selecting amplitude unevenness standard point as initial seed point, also in the way of neighborhood growth;The calculation of amplitude unevenness growth process only needs to extract its amplitude from the previous reflectivity level calculation result, and compare with standard point amplitude;Static area is the spatial range under the superposition of two indicators.The present application realizes the static area of the required static area index three-dimensional space, realizes static area extraction automation.

The invention discloses an active control and collaborative support construction method for an inclined shaft open channel-hidden tunnel junction section, and belongs to the technical field of mine and tunnel engineering construction. The method sequentially comprises the following steps that guniting protection is conducted on an open channel excavation upward slope, and a surface stress closed shell is formed; an advanced pipe shed is constructed on the arch portion of the hidden tunnel, grouting is conducted, and a deep pressure-bearing arch and a composite stress shell are formed; mechanical excavation is conducted under protection of the composite pre-supporting system, and a U-shaped steel retractable support is immediately erected to serve as a temporary support; a reinforced concrete permanent well wall is constructed on the inner side of the temporary support; and finally, wall back grouting backfilling reinforcement is carried out, and a full-ring closed three-dimensional waterproof and drainage system is formed. The core of the method lies in that a linked active control and collaborative supporting system is constructed, and the industrial problems that surrounding rock of the light and shade junction section is poor in stability and prone to collapse and water seepage are effectively solved through temporary and permanent supporting conversion combining composite pre-supporting, yielding and pressure resistance and three-dimensional water prevention; and the construction safety and the engineering quality are obviously improved.

The present invention relates to an in-vitro diagnostic apparatus using a test cartridge employing chemiluminescence. The in-vitro diagnostic apparatus of the present invention has a test cartridge holder made of an opaque material and configured to support a side of a test cartridge, an upper dark chamber wall having its side surfaces other than a bottom surface closed by an opaque material, the upper dark chamber wall being configured to be movable up and down and to descend to closely contact an upper surface of the test cartridge holder and an upper peripheral portion of a measurement hole of the test cartridge at the time of light measurement, and a lower dark chamber wall having its side surfaces other than a top surface closed by an opaque material, the lower dark chamber wall being configured to be movable up and down and to ascend to closely contact a lower surface of the test cartridge holder and a lower peripheral portion of the measurement hole of the test cartridge at the time of light measurement. The in-vitro diagnostic apparatus of the present invention can realize a dark chamber only in a measurement hole among a plurality of holes of a test cartridge.

A method for curing a plant material is disclosed. The method includes loading the plant material inside a dark chamber and maintaining a humidity level and a temperature inside the chamber at a first humidity level and a first temperature, respectively, for a first time duration. The first humidity level is between 65 percent and 85 percent and the first temperature is between 45 degrees Fahrenheit and 65 degrees Fahrenheit. The method further includes changing the humidity level and the temperature inside the chamber from the first humidity level and the first temperature to a second humidity level and a second temperature, respectively, upon elapse of the first time duration. The second humidity level is between 45 percent and 65 percent and the second temperature is between 65 degrees Fahrenheit and 85 degrees Fahrenheit.

This application discloses a panoramic glass assembly and a vehicle. The panoramic glass includes a roof and the panoramic glass itself. A gap is formed between the roof and the panoramic glass in the thickness direction of the panoramic glass, and the gap is greater than or equal to 3 mm. The parallax index of the panoramic glass is defined as R, where 0 ≤ R ≤ 1.5. The parallax index of the panoramic glass is equal to the ratio of the visible light transmittance of the panoramic glass to the reflectance of the outer side wall of the panoramic glass facing away from the roof. By using the panoramic glass assembly of this application, a dark chamber space is formed between the panoramic glass and the roof, and the panoramic glass has a one-way invisible visual effect. Thus, pedestrians cannot see the internal structure of the panoramic glass from the outside, improving the overall aesthetics of the vehicle.

The invention discloses a compact range reflecting surface constant-temperature design method, belongs to the technical field of compact range reflecting surface design, and designs a compact range reflecting surface constant-temperature device which synchronously designs the appearance and size at the beginning of reflecting surface design. A vapor chamber with a capillary effect and conducting liquid is arranged in the compact range reflecting surface constant temperature device, and a semiconductor sheet and a temperature measuring sensor are arranged on the vapor chamber every 10-30 cm. A temperature-voltage feedback circuit matrix is designed, and positive and negative electrodes of all semiconductor chips and a probe interface of a temperature measurement sensor are connected to a control matrix. The invention designs a compact range constant-temperature technology, particularly a compact range reflecting surface constant-temperature technology which greatly reduces energy consumption compared with a traditional darkroom constant-temperature technology, and through the technology, constant temperature of the compact range reflecting surface is realized under the condition that the energy consumption is reduced, so that deformation of a metal reflecting surface is reduced, and the surface precision of the reflecting surface is guaranteed; therefore, the stability of the amplitude-phase characteristic of the dead zone is ensured.

The utility model relates to a microwave anechoic chamber centering device, belongs to the technical field of radar antenna calibration, and solves the problems of complex structure and tedious centering test of a centering device in the prior art. The device comprises a laser range finder, an image collector, a laser range finder tool, an auxiliary light source, a rotary table, a main control computer, a rotary table communication computer, a router and a power supply, the laser range finder, the image collector and the auxiliary light source are all installed on the laser range finder tool, and the laser range finder tool is fixed to the rotary table. The laser range finder and the image collector are electrically connected with the main control computer; the turntable is electrically connected with the turntable communication computer; the main control computer and the rotary table communication computer are connected with the router; the auxiliary light source and the image collector are electrically connected with the power supply. Simple and convenient daily microwave anechoic chamber centering is realized.

The invention discloses a Beidou navigation antenna and communication antenna feed source phase center detection method, and belongs to the technical field of satellite navigation and communication. The method specifically comprises the following steps: S1, connecting a transmitting antenna, a transmitting turntable, a vector network analyzer, a computer, a printer, an antenna turntable and a to-be-tested antenna in a microwave darkroom; and S2, debugging the to-be-measured antenna and the transmitting antenna through the laser beam to ensure the consistency of the measurement reference. The six surfaces of the anechoic chamber are covered with shielding materials and wave absorbing materials, so that external electromagnetic wave interference can be effectively isolated, a non-reflection and low-interference detection environment is created, phase measurement data distortion caused by external electromagnetic signal coupling is avoided, and it is ensured that a detection result truly reflects the characteristics of the antenna; parameters such as the silent area size, humidity, temperature and atmospheric pressure of the microwave anechoic chamber are strictly limited, the influence of environment temperature and humidity on the electrical performance of the antenna is reduced, and the consistency of detection conditions is ensured.

The invention belongs to the technical field of medical instruments, and discloses a portable visual function tester which comprises VR imaging glasses, and the VR imaging glasses internally comprise a control module, an imaging module, a display module, an audio module, an interaction module and a data processing module. Through cooperation of the adjusting buckle, the elastic band and the adjusting rod, the wearing tightness can be flexibly adjusted, and through auxiliary fixing of the hook-and-loop fasteners, the head size of different examinees can be adapted; meanwhile, the earphone on the inner side of the elastic band is synchronously attached to the ear along with the wearing assembly, extra debugging is not needed, and the use convenience is greatly improved; the silica gel rings of the eyes of the VR imaging glasses are made of a flexible silica gel material, so that the comfort level of face fitting is improved, the sealing performance of the closed anterior-eye darkroom is enhanced, external light interference is avoided, the definition of an inspection scene constructed by the imaging module is effectively guaranteed, the display of inspection prompt information is more stable, and actual application and operation are facilitated.

This invention discloses a multi-channel magnetic colorimetric detection device and method. The device includes a light source, a dark chamber, a photographic device, a concentration gradient color chart, and one or more cuvettes. The method includes the following steps: 1) Using the photographic device, acquire images of the concentration gradient color chart and establish a standard curve of color information versus concentration. 2) Place the sample to be colorimetrically detected into the cuvette. Open the movable cover of the sample chamber, then place the cuvette into the slot, and close the movable cover to seal the sample chamber. 3) Attach the photographic device to the photographic panel, and align the camera of the photographic device with the camera hole. 4) Use the photographic device to acquire images of the sample inside the sample chamber, obtain the color information of the sample image, and determine the sample concentration based on the standard curve of color information versus concentration. This invention solves the problems of photographic device placement and color differences between different photographic devices.

This utility model relates to the field of mobile phone display brightness testing technology, and more particularly to a mobile phone display brightness testing device. This utility model provides a mobile phone display brightness testing device that can test the brightness of a mobile phone display in a closed environment by simulating sunlight, eliminating the influence of uncontrollable external factors and improving testing accuracy and reliability. A mobile phone display brightness testing device includes a base plate and a testing dark chamber, with the testing dark chamber connected to the upper side of the base plate. This utility model achieves the effect of testing the brightness of a mobile phone display in a closed environment by rotating and adjusting a fluorescent lamp to align it with the mobile phone display, then turning on the fluorescent lamp to illuminate the display, simulating sunlight. Afterwards, by holding the handle and turning to close the sealed door, the device can test the brightness of the mobile phone display in a closed environment by simulating sunlight, eliminating the influence of uncontrollable external factors and improving testing accuracy and reliability.

This invention discloses a detection circuit, device, and method for perovskite tandem photovoltaic modules. The electroluminescent detection device includes: a detection box, a power supply module, a camera, an image processing module, and an image analysis module. The detection box contains a dark chamber for detecting perovskite / crystalline silicon tandem photovoltaic modules. The camera is located inside the dark chamber. The power supply module applies excitation voltage / current to the perovskite / crystalline silicon tandem photovoltaic modules. The image processing module is connected to the camera, and the image analysis module is connected to the image processing module. This invention solves the problem of inevitable interference between two cameras with different functions during use by setting a switchable conversion switch to control the connection between the power supply / perovskite cell and the power supply / crystalline silicon cell respectively. It photographs perovskite / crystalline silicon tandem photovoltaic modules with a four-terminal / two-terminal parallel structure before the junction box is installed after lamination.