1018 results about "Dark room" patented technology

The present invention provides a system and method for multi-path simulation that employs a shielded anechoic chamber to avoid external electromagnetic interference and other uncontrollable transmission paths during testing, and simulates a main indirect transmission path by a reflector within the chamber. An attenuating device is used to attenuate signals, thereby simulating the signal attenuation during transmission. The shielded anechoic chamber also includes a movable platform and a turntable, both controlled by a control unit, for carrying a dipole antenna and a wireless communication device to be tested respectively. The movable platform is used to shift the antenna, thereby simulating the phase shift between a direct path and a main indirect path of the system; the turntable is used to change the reception azimuth of the communication device, thereby measuring the performance of the device in various azimuth angles.

An aquarium having an adjustable lighting system for enhancing the display of fluorescent objects, such as fluorescent fish, contained within the aquarium under various external lighting conditions, such as a dark room or a brightly lit room. The aquarium comprises a tank and a plurality of light sources. Each light source emits light at a different wavelength spectrum which is selected to enhance the display of the fluorescent object under each type of external lighting condition. An electronic control is provided to control the operation of the plurality of light sources such that each light source may be selectively turned on/off based on the external lighting condition, or chronological criteria, to provide the best viewing experience.

The invention requests to protect an infrared focal plane array blind pixel detection method based on integral time adjustment, belongs to the technical field of signal detection. Aiming at the condition limitation that the traditional blind pixel detection method based on a standard black body radiation source depends on an expensive black body and a fixed dark room and the blind pixel detectioncannot be performed as required anytime anywhere, the invention provides a method of flexibly and conveniently adjusting a response output value of the infrared focal plane array in different integral time through a CPLD (complex programmable logic device) programming, computing a response rate of each detection unit according to the response output value and detecting the blind pixel according to the blind pixel definition. The detection unit response output value, the blind pixel detection and the blink pixel compensation in different integral time are recorded. The method provided by the invention has a simple implementation process, and has application and spread value in the IRFPA (infrared focal plane array) blind pixel detection.

The present invention provides a system and method for multi-path simulation that employs a shielded anechoic chamber to avoid external electromagnetic interference and other uncontrollable transmission paths generated in testing, and divides and adjusts a signal into multiple simulation signals to simulate the attenuations and delays generated in multi-path transmission of the signals. The shielded anechoic chamber includes a turntable, controlled by a control unit, for carrying a wireless communication device to be tested and for changing the reception azimuth of the device, thereby measuring the electric wave transceiving of the device.

The invention discloses a method for preparing Cordyceps rice foods. The method has the advantages of short production cycle, stable quality of products and no pollution, and ensures that the requirements for food safety can be met. The method comprises the following specific steps: inoculating a Cordyceps liquid seed suspension which is obtained by virtue of liquid culture to rice which is swollen by water and sterilized; performing solid fermentation in a dark room and a light room alternately to produce Cordyceps-fermented rice; and further processing to produce the Cordyceps rice foods.

The invention discloses an automatic LCD screen detecting cabinet based on machine vision. The automatic LCD screen detecting cabinet based on machine vision comprises a cabinet base, a darkroom, a multi-station rotating plate system, an automatic machine vision adjusting system and an automatic PG screen pointing system. The automatic PG screen pointing system comprises a graph signal generator, a pneumoelectric sliding ring, a power source, a computer and a plurality of signal rotating plates corresponding to LCD screen jigs in number. The automatic machine vision adjusting system comprises an industrial camera, a camera installation assembly, a perpendicular movement mechanical arm and a mechanical arm support. A light source support is further arranged on the top of the cabinet base, and a light source is arranged on the light source support and located between the industrial camera and the LCD screen jigs. The signal output end of the industrial camera is connected into the computer, and the control end of the perpendicular movement mechanical arm and the control end of the motor are connected into the computer. The automatic LCD screen detecting cabinet can eliminate the influences of external natural light and dust and impurities in the air on LCD screen defect detection, and meanwhile, the detecting cabinet has high integration degree, and the detecting efficiency of an LCD screen is greatly improved.

The invention discloses a lightning effect test device for a dynamic airplane. A computer in the device is arranged outside a microwave dark room; a round turntable A, a round turntable B, an airplane scale model, a lightning generator, a spectrum recorder, a support platform and a camera are arranged in the microwave dark room; the camera is mounted on the support platform; the airplane scale model is mounted on the round turntable A; the spectrum recorder is mounted on or in the airplane scale model; and the lightning generator is mounted on the round turntable B. When the round turntable A and the round turntable B rotate relatively, various types of lightning analogue currents and electromagnetic waves generated by the lightning generator act on the airplane scale model; and when the lightning happens, the spectrum recorder records the lightning indirect effect, and the camera records the lightning direct effect. According to the invention, the process that the airplane in dynamic flying mode encounters lightning can be simulated in the limited space of the microwave dark room so that the tested data approaches to the real conditions better and the error is reduced.

The invention discloses a method for degrading methyl orange dye wastewater with a ZnIn2S4 visible light catalyst. The method comprises the following steps: using zinc salt, indium salt and sulfur source as reaction materials; dissolving the materials in a de-ionized water solution according to a stoichiometric ratio; starting a hydrothermal reaction at the temperature of 30-90 DEG C to obtain ZnIn2S4 visible light catalyst powders; moving the prepared methyl orange solution into a self-prepared glass reaction vessel; adding the prepared ZnIn2S4 powders; placing the reaction system in a dark room and stirring for 20-60 minutes in dark; stirring for 1-4 hours under visible light; and determining that the methyl orange is fully degraded after being separated by high speed centrifugation. By using the method provided by the invention, the methyl orange solution can be degraded efficiently at room temperature and under normal pressure, conditions of the degradation process in the method can be easily controlled, the process is simple and is easy to learn and operate, the time required for complete degradation is short, and the energy consumption is low.

The invention relates to a self-cleaning microwave absorption paint and uses thereof. According to the invention, a urethane foam pyramidal material is coated with a layer of paint to form a micron-nano composite structure layer which has an angle of contact larger than 150 degrees and an angle of roll smaller than 5 degrees. The paint consists of a nano material, a micrometer material, a coupling agent, bonding resin, a base material, a curing agent, an auxiliary and an organic solvent. By means of the microwave absorption paint provided by the invention under a fireproof spraying mode, water beads can roll off a pyramidal surface rapidly with ashes contained in the water beads, thus achieving the effect of self cleaning, reducing the ashes in a microwave darkroom and accordingly meeting the special requirement of a cleaning-type dark room on maintaining high long-term cleanness. The self-cleaning microwave absorption paint provides a new way for implementing the cleaning-type dark room.

The invention discloses a measuring system and a measuring method for a power contour of a reader-writer antenna. The measuring system comprises a reader-writer arranged outside a microwave dark room, middleware, a rotary table controller, a sliding block controller, a host computer and a drawing printer, wherein an electronic tag, a rotary table, a horizontal guide rail, a bracket, two positioning sensors, the reader-writer antenna and a sliding block are arranged in the microwave dark room. The method reflects a reader-writer response electronic tag zone to a certain degree by measuring feedback points with the same power in a three-dimensional direction of the reader-writer antenna, so the method has deeper realistic meaning than a directional diagram. An electromechanical device ensures automatic performance of the measuring method, a testing environment provides free space and a test result becomes more persuasive and reliable. The measuring system and the measuring method have a reference value for the field application of a wireless radiofrequency recognition system and the layout of a tag.

An ambient light adaptive color correction system and method are provided in the present invention. Firstly, a color information sensor measures color information of at least black and white reference images on a projector plane with influence of ambient light. Then a color correction information calculator calculates color correction information for color appearance matching and gamut mapping based on the measured color information and a projector profile. And after pre-calculation, an image data correction unit processes an input image according to the color correction information to produce a corrected-color image to be outputted to the projector. Accordingly, the output image displayed on the projection plane with influence of ambient light will have a close color appearance to that in the dark room.

A multispectral imaging color measurement system, comprising a dark room, a sample platform and an imaging device for capturing said object being measured; a controllable illumination device, a filter wheel unit, an imaging signal processing unit and an electronic control unit. A method for processing imaging signals of the multispectral imaging color measurement is also proposed. The multispectral imaging color measurement system and the method for processing imaging signals thereof can overcome the inaccuracy of traditional digital imaging systems and the limits of spectrophotometer systems and provide users in the textile industry with highly accurate color measurement and evaluation.

The invention discloses a full automatic chemiluminescence immune assay instrument. An upper needle plate group device, a photon detection device and a reagent strip propelling device are located above an upper plate; a specimen disc device and an incubation disc device are located below the upper plate; a dark room detection device is located in a region adjacent to the photon detection device and the reagent strip propelling device; a V-shaped notch slot is formed in a reagent putting station, corresponding to the incubation disc device, of the upper plate; both a puncture needle group device and an enhancing liquid needle group device in the upper plate needle group device are provided with a double needle structure which not only can move horizontally, but also can move vertically, and the other needle assemblies in the puncture needle group device and the enhancing liquid needle group device are stirring needle assemblies. As the station of the incubation disc device is of a reasonable layout structure and the double needle structure is combined in use, the automatic degree of the instrument is improved, and the whole instrument is simpler and more compact in structure; and moreover, the full automatic chemiluminescence immune assay instrument is low in cost and quite suitable for being popularized and generalized in medical units at home.

The invention discloses a gender identification method for a chick embryo in a near-infrared hatching egg at earlier stage of incubation, and belongs to a hatching egg detection technology. The method comprises the following steps: obtaining a near-infrared spectrum of a hatching egg through an optical fiber probe and a Fourier near-infrared spectrometer in a dark room, decomposing the near-infrared spectrum of the hatching egg by an overall mean empirical mode, removing high-frequency characteristic mode components to remove noise, removing low-frequency characteristic mode components by a method based on empirical mode decomposition to achieve baseline correction, extracting main components of spectral data as input variables of a nerve network so as to finish the identification, wherein the output value of the nerve network is 0 or 1. According to the method, the gender identification efficiency and accuracy of the hatching egg at earlier stage of incubation are high, the incubation cost is reduced, and the development of layer chicken and meat chicken feeding production is facilitated.

The present invention relates to natural algae auxin, and is especially method of extracting algae auxin from algae. Algae is first washed with sea water to eliminate surface small life and impurity and has its surface water eliminated, algae poly phenol antioxidant in the amount of 0.2-0.4g/kg algae and methanol in the amount of 1.4-1.8g/kg algae are then added and mixed with algae to extract under stirring inside dark room, and through filtering and evaporating concentration to obtain the concentrated matter as the algae auxin. The present invention has the advantages of simple and practical process, low cost, short preparation period, etc.

The invention provides a microwave anechoic chamber performance measuring method, which comprises the following steps of: adopting a microwave anechoic chamber performance measuring system, and setting a dead zone parameter, a measuring frequency, a signal source power, a scanning trace and a kinematic velocity of a receiving antenna, and a rotation direction and a rotation velocity of a transceiving antenna according to the requirements of a microwave anechoic chamber performance analysis test; driving a signal source according to the signal source power; driving each stepping motor to control each moving part to move according to the scanning trace and the kinematic velocity of the receiving antenna, and the rotation direction and the rotation velocity of the transceiving antenna; and controlling a signal receiver to receive a signal of the receiving antenna according to the measuring frequency, and storing the signal. The method can be adopted to be applied in a microwave anechoic chamber flexibly so as to measure along different scanning traces; and a computer is adopted to realize automatic measurement of microwave anechoic chamber dead zone reflectivity level, cross polarization character, multi-path loss uniformity, and field uniformity performance indexes, so that the measuring efficiency is improved.

The present invention provides a wireless AP performance automatic test system, which includes a test host equipped with a test server, a test terminal equipped with a standard wireless network card, and a microwave shielding dark room, and the AP to be tested and the antenna of the standard wireless network card are respectively set In the microwave shielding chamber, a standard wired network card is also provided in the test host, and the standard wired network card is connected to the tested AP through a network cable, and the antenna and the standard wireless network card are connected through a cable. connection; in the microwave shielding anechoic room, the tested AP is set on a controllable 360-degree turntable. By rotating the turntable, the indicators of STAs at different angles can be simulated.

The invention provides methods and devices for testing downlink and uplink wireless indexes of an active antenna system. The method for testing the downlink wireless index is carried out in a wave-absorbing dark room or a signal non-interference space and comprises the following steps of: acquiring calibration parameters of the wave-absorbing dark room or the signal non-interference space; configuring the active antenna system to transmit a wireless wave beam to a receiving antenna, wherein the wireless wave beam is triggered and generated by a base-band signal from a base-band processing unit outside the wave-absorbing dark room or the signal non-interference space, and then transmitted to a test instrument outside the wave-absorbing dark room or the signal non-interference space through the receiving antenna; and starting the base-band processing unit and the active antenna system, and testing the wireless indexes of the adjusted active antenna system according to the calibration parameters. By adoption of the technical scheme provided by the invention, testing of various wireless indexes of the active antenna system is realized.

The invention discloses an optical imaging device as well as a manufacturing method and application thereof. The optical imaging device comprises an identification carrier, a darkroom shell, an image sensing device and a light source, wherein the identification carrier is provided with a transparent object space identification area; the darkroom shell forms a darkroom and has a through hole which is communicated with the darkroom; the image sensing device comprises an image sensor which is mounted in the darkroom; the light source is mounted outside the darkroom shell; and when an identification object is placed in the object space identification area, an emission light ray emitted by the light source emits to the object space identification area and further reaches the surface of the identification object to be reflected, and then passes through the through hole to be projected to the image sensor, so that the identification object is imaged through the optical imaging system via a pin-hole imaging principle.

The invention discloses an electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal and a preparation method of the holographic grating. The preparation method comprises the following steps, uniformly mixing and heating polymer dispersed liquid crystal materials containing nano metal particle materials by an ultrasonic emulsification instrument under the light shading condition, standing for 24-48h in a dark room, then injecting the polymer dispersed liquid crystal materials into a liquid crystal box, and then arranging the packaged liquid crystal box at a holographic light field of a helium-cadmium laser for exposure to finally obtain the electronically-controlled high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal. In the steps, the polymer dispersed liquid crystal materials comprise the following components by weight: 0.1-0.2% of photoinitiator, 0.3-0.5% of coordinated initiator, 9-11% of cross linking agent, 9-10% of surface active agent, 0.1-0.2% of nano metal particles, 40-50% of polymers and 30-40% of nematic liquid crystal. According to the electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal, the diffraction efficiency reaches up to 85%-95%, the response speed is less than 1ms, and the electro-optic properties are improved remarkably.

The present invention relates to a plasma display apparatus and method of driving the same, wherein erroneous discharge, miss-discharge and abnormal discharge are prevented, dark room contrast is increased, and operational margin is widened. According to the plasma display apparatus and driving method thereof, a negative voltage is applied to a first electrode, and a positive voltage is applied to a second electrode, whereby wall charges of a positive polarity are accumulated on the first electrode and wall charges of a negative polarity are accumulated on the second electrode, within discharge cells during a pre-reset period. The discharge cells are then initialized using the wall charge distribution of the discharge cells during a reset period.

An automatic indoor ambient illumination regulation and control system belongs to the field of indoor lamplight illumination control devices, and comprises an ambient light sensing module, a centralized control module, a human body infrared sensing module, an LED (light-emitting diode) illumination module and a power supply module, wherein the on-off and the luminance of the LED illumination module are controlled by the centralized control module; the ambient light sensing module detects the brightness of ambient light; the human body infrared sensing module detects whether a human body signal exists indoors; and the centralized control module can simultaneously receive sensing signals transmitted by the ambient light sensing module and the human body infrared sensing module. The control system can detect a lamplight illumination value of a room with brighter light rays in real time, can monitor whether a person enters a darker room in real time, intellectually controls illumination change of an illumination lamp in the darker room in delay and progressive lamplight illumination control modes, reduces light intensity contrast between the two rooms, greatly weakens and eliminates the discomfort of human eyes, and raises and increases a comfort level and an adaptation speed of a human sense organ.

The invention provides integrated portable standardized traditional Chinese medical science tongue image acquiring equipment which has the characteristics of standard imaging environment, high color fidelity, high imaging quality and humanized man-machine interaction. The equipment comprises a camera, a standard imaging light source, an equipment shell for simulating darkroom environment, a computer, a display, a jaw support and a standard color card, wherein the camera, the standard imaging light source, a power supply, a monitoring television, a heat radiating fan, the jaw support and the standard color card are arranged in the shell for simulating the darkroom environment; the jaw support is arranged at the lowest side, a nose support is arranged in the middle, the standard imaging light source is arranged between the camera and the standard color card, and the heat radiating fan is arranged on the upper part of the shell for simulating the darkroom environment; the camera is connected with the computer; and the computer is connected with the display. The invention is suitable for traditional Chinese medical science diagnosis and treatment and traditional Chinese medical science objective researches and has the characteristics of high integration degree, standard imaging environment, high color fidelity, high imaging quality and humanized man-machine interaction.

A plant-growing device with light emitting diode comprises a darkroom, a generator, a gas collecting device and a water supplying device. The darkroom comprises an accommodating space and a plurality of light emitting diodes disposed in the accommodating space for producing a light beam irradiating the accommodating space. The generator is disposed outside the darkroom. The generator is configured to receive sunlight from the atmospheric environment and convert it into an electric energy and provide the electric energy for the light emitting diodes. The gas collecting device connected between the accommodating space and the atmospheric environment is configured to transfer carbon dioxide from the atmospheric environment into the accommodating space and discharge oxygen from the accommodating space into the atmospheric environment. The water supplying device connected to the darkroom is configured to transport water outside the darkroom into the accommodating space.