305 results about "Uv detection" patented technology

A hand-held mobile communication device, such as smart telephone, incorporating sensors and signal conditioning modules for measuring signals from external sources of electromagnetic radiation (EMR) in the low, radio, ultraviolet, and infrared spectral ranges. These include the detector for receiving and monitoring electromagnetic fields originating from various external sources of radiation that pose potential health hazards or may interfere with various electronic devices. The mobile phone equipped with such sensors could alternate between communication and monitoring functions. Other integrated EMR sensors are a photodiode for the ultraviolet detection to monitor the user's sun exposure and a thermopile for non-contact measurement of temperature of humans or inanimate objects. This infrared sensor in combination with a photographic digital camera and a pattern recognition signal processing allows measuring temperatures at specific locations and from optimal distances to the surface of the object to enhance accuracy of non-contact temperature measurements.

The present invention relates to an ultraviolet radiation detector in general and more specifically to a solar blind ultraviolet radiation detector; that is, a detector insensitive to the radiation of sunlight reaching the earth's surface but sensitive to UVC wavelengths in the spectrum, defined as the interval 200 nm-280 nm. The solar blind detector is base on the use of photochromic compounds in conjunction with ultraviolet wavelength-selective chemical blocks and their incorporation into optically clear polymer matrices. The photochromic compound is selected from the group comprising spiropyran molecules spirooxazine molecules and chromene derivatives. Applications for such device are as numerous as the sources of UVC radiation. An obvious use for such Solar Blind UVC detector is monitoring the output of UVC sources used in the decontamination of water and air (water treatment and air purification) and for sterilization of medical instruments.

A hand-held mobile communication device, such as smart telephone, alone or in protective case, incorporating sensors and signal conditioning modules for measuring signals from external sources of electromagnetic radiation (EMR) in different spectral ranges. These include detector monitoring EMR that pose potential health hazards or may interfere with various electronic devices. Other integrated EMR sensor is a photodiode for the ultraviolet detection to monitor the user's sun exposure and a thermal infrared detector for non-contact measurement of temperature of humans or inanimate objects. This detector in combination with a digital camera and a pattern recognition signal processing allows accurate non-contact measuring temperatures at specific location.

A polymer-based microfluidic device and its manufacturing methods. This microfluidic device is suitable for chromatographic and electrophoretic separations in which the detection of the components in the fluid is by means of ultraviolet (UV) spectroscopy. The device further comprises at least one cooling channel adjacent the separation channel, said cooling channel conducting a cooling fluid through the device for removing heat from the the separation channel. At least one section of the separation channel has an increased cross-sectional dimension with respect to other sections of said channel to provide an increased optical path length when the device is used in an ultraviolet detection arrangement.

A polymer-based microfluidic device and its manufacturing methods. This microfluidic device is suitable for chromatographic and electrophoretic separations in which the detection of the components in the fluid is by means of ultraviolet (UV) spectroscopy. The device further comprises at least one cooling channel adjacent the separation channel, said cooling channel conducting a cooling fluid through the device for removing heat from the the separation channel. At least one section of the separation channel has an increased cross-sectional dimension with respect to other sections of said channel to provide an increased optical path length when the device is used in an ultraviolet detection arrangement.

The invention discloses a method for detecting a composite insulator based on multi-spectrum. The method comprises: selecting a detection device; under a same operation condition, performing visible light detection, infrared detection, and UV detection of the same composite insulator by using the detection device to obtain detection images of the composite insulator; performing comparison of a partial discharge lighting spot of the visible light image, a partial hot spot of the infrared image, and an electric corona spot of the UV image; performing comparison of visual light images, infrared images, and UV images of different composite insulators of the same pole tower of the same line under the same operation condition; establishing a multi-spectrum detection database according to each composite insulator; and performing data comparison and finding out existing data difference according to detection data in a certain period. According to the method, visual light detection, infrared detection, and UV detection can be organically combined; advantages are complemented; and electrified detection of the insulator is easy to perform. A defect of the composite insulator can be discovered in time, so that large-area tour-inspection is convenient to develop.

The invention belongs to the field of semiconductor optoelectronic detectors, in particular relates to a back incident-type UV detector with quartz as a substrate, nano-TiO2 thin film as a basic UV detection material and Ni as a metal electrode, and a preparation method thereof. The detector takes the quartz as the substrate and adopts an M-S-M (metal-semiconductor-metal) structure. The method for manufacturing the UV detector comprises the steps of adopting a sol-gel technique to grow a TiO2 nanometer thin film on the quartz substrate, evaporating a layer of thin Ni on the prepared TiO2 thin film by a magnetron sputtering method to achieve electrode contact, and adopting lithography technology to obtain Ni inserted-finger shape electrodes. The UV detector in an MSM planar double schottky barrier structure adopts a back incident-type working mode and can greatly improve responsiveness. The detector has good detection performance for the UV rays 250 to 350 nm in wavelength.

A crystal filter and a method of making a crystal filter capable of transmitting radiation within a particular pass band is disclosed. The crystal filter is particularly appropriate for a UV detection system, where the pass band is between about 200 to about 350 nm. A UV detection system incorporating the crystal filter is also described. One embodiment of crystal filter is formed from a single-crystal transparent host, such as a fluoride host, codoped with lanthanide or actinide fluorides and lanthanide or actinide nitrides, oxides, borides, carbides or hydroxides. Filter crystals according to the present invention can be grown by various crystal growth methods, including Czochralski and Bridgeman crystal growth methods.

A solution for evaluating a sample gas for a presence of a trace gas, such as ozone, is provided. The solution uses an ultraviolet source and an ultraviolet detector mounted in a chamber. The chamber can include reflecting walls and / or structures configured to guide ultraviolet light. A computer system can operate the ultraviolet source in a high power pulse mode and acquire data corresponding to an intensity of the ultraviolet radiation detected by the ultraviolet detector while a sample gas is present in the chamber. Using the data, the computer system can determine a presence and / or an amount of the trace gas in the sample gas.

The present invention provides an ultraviolet detecting device which comprises a silicon semiconductor layer having a thickness ranging from greater than or equal to 3 nm to less than or equal to 36 nm, which is formed over an insulating layer, lateral PN-junction type first and second photodiodes formed in the silicon semiconductor layer, an interlayer insulating film formed over the silicon semiconductor layer, a first filter layer made of silicon nitride, which is formed over the interlayer insulating film provided over the first photodiode and causes light lying in a wavelength range of an UV-B wave or higher to pass therethrough, and a second filter layer made of silicon nitride, which is formed over the interlayer insulating film provided over the second photodiode and allows light lying in a wavelength range of an UV-A wave or higher to pass therethrough.

A UV detector has a UV detection thin film of coated spherical silicon nanoparticles formed upon a substrate. The detector includes structures to bias the thin film. In preferred embodiments, a thin conductor that is at least semi-transparent to UV radiation is formed over the thin film. In preferred embodiments, the UV detector is formed as a silicon based integration, upon a device quality silicon wafer.

An ultraviolet detector comprises a metal tubular member which hermetically encloses an anode and a cathode therein and is filled with a discharged gas introduced therein from a metal exhaust tube. After the anode and the cathode are enclosed within the tubular member, the ultraviolet detector can be made without being subjected to any glass fusing process. Accordingly, the inside of the sealed vessel V1 can be prevented from being contaminated with fluorine, whereby the ultraviolet detector with stable characteristics can be provided.

The invention relates to the field of device detection and specifically relates to an ultraviolet ray detecting based system and a method for monitoring and analyzing insulation states of a high-voltage device. The system comprises an ultraviolet camera shooting module, a terminal video processing module, a distance measurement module, a wireless network module, an ultraviolet video management analysis module and a light emitting diode (LED) display module. By means of an ultraviolet photon number correction method, ultraviolet detection videos are subjected to digital recognition through the ultraviolet video management analysis module to extract information of ultraviolet photon numbers and the like, and the ultraviolet photon numbers are calibrated onto a standard distance scale according to actually measured distances, so that corona discharge intensity can be comprehensively compared and analyzed, influence brought by field detection conditions is eliminated, insulation states of the device is accurately evaluated, and the system and the method have the advantages of being visual, accurate, safe and fast.

The invention discloses an unmanned plane-mounted UV detection system for power transmission and transformation equipment. The unmanned plane-mounted UV detection system comprises a four-rotor aviation unmanned plane (2) with a landing frame (1), a vertically movable holder (3) which is installed under the four-rotor aviation unmanned plane, and a UV imager (9) fixedly installed on the holder. The unmanned plane-mounted UV detection system saves labor cost. In regions with complex landform, tour inspection of power transmission lines is difficult, and manual tour inspection consumes is labor-consuming and costs a lot of resources. The unmanned plane-mounted UV detection system effectively saves labor cost, and reduces labor investment. The UV imager is a high definition camera, and can detect damage of a power transmission line, accurately position discharging points of the power transmission line and provide reliable coordinate position for maintenance.

A customizable high-gain ZnO nanowire array UV detector and a preparation method thereof relate to the fields of microelectronic technologies, nanometer technologies and UV detection. On the basis of a synergic theory, nanowires compete for a reaction solute when fluctuation is instable, an in such a competition mechanism, the thinner a seed layer is, the fewer solute resources are needed, and growth time is decided by the growth speed. Based on such a growing principle, the thickness of the seed layer, the solution concentration and growth time are adjusted to obtain nanowires of higher quality, and UV detection devices of different gains are obtained. The method is simple and effective, and the customized devices of different gains can be suitable for UV detection in different environments.

A glare protection device for a welding protective mask includes active electro-optical protective filter (2) and an electronic circuit (10). A UV-detector (UVD), which serves as an optical sensor, detects the welding light and, via an evaluation circuit (10.1), generates a signal (sin) for controlling of the protective filter (2). The signal corresponds to the detected UV intensity. This results in a simple and safe controlling of the protective filter, which is uninfluenced by the effects of extraneous light.

The invention discloses a smart bracelet and an ultraviolet detection method. An ultraviolet sensing unit is arranged on the smart bracelet. The ultraviolet detection method comprises the following steps: detecting the intensity value of an ultraviolet ray by virtue of the ultraviolet sensing unit; according to the intensity value of the ultraviolet ray, grading the ultraviolet ray so as to obtain the grade of the ultraviolet ray; judging whether the grade of the ultraviolet ray is greater than or equal to a danger grade threshold or not; and transmitting prompt information when the grade of the ultraviolet ray is greater than or equal to the danger grade threshold.

A wearable device is disclosed. The wearable device comprises an ambient temperature sensor, an ambient humidity sensor, an ultraviolet detector, a skin temperature sensor, an alarm module and a process unit. The ambient temperature sensor, the ambient humidity sensor and the ambient humidity sensor detect an ambient temperature, an ambient humidity and an ultraviolet index nearby the wearable device, respectively. The skin temperature sensor contacts with the user's skin and detects a skin temperature of the user. The process unit stores at least one preset heatstroke condition and determines whether heatstroke occurs based on the detected results of the ambient temperature, the ambient humidity, the ultraviolet index and / or the skin temperature and the at least one preset heatstroke condition. The alarm module is enabled by the process unit to generate at least one alarm signal when the process unit determines that the at least one preset heatstroke is met.

A method for determining particle size distribution of nanoparticle by utilizing capillary tube electrophoresis includes preparing nanoparticle sample to be suspension , obtaining capillary tube electrophoretic spectrogram of suspension through separation and detection , substituting regulation moving time of particle with different particle size in spectrogram in correlation equation of particle ¿C regulation moving time for obtaining particle size value , calibrating absorbance obtained from spectrogram with calibration equation of particle content scattering for obtaining content percentage of particle with different particle size .

A solution for evaluating a sample gas for a presence of a trace gas, such as ozone, is provided. The solution uses an ultraviolet source and an ultraviolet detector mounted in a chamber. The chamber can include reflecting walls and / or structures configured to guide ultraviolet light. A computer system can operate the ultraviolet source in a high power pulse mode and acquire data corresponding to an intensity of the ultraviolet radiation detected by the ultraviolet detector while a sample gas is present in the chamber. Using the data, the computer system can determine a presence and / or an amount of the trace gas in the sample gas.

Disclosed is a potted flower remote testing system capable of acquiring ultraviolet ray and image information. A temperature and humidity detection device monitors temperature and humidity of a flower growing environment and humidity of soil, a camera acquires images of flowers, an ultraviolet detection device detects ultraviolet intensity around the flowers and transmits detected data to a backend server through a wireless router and the internet, and the backend server analyzes the data and transmits the data to an expert terminal; the backend server returns analysis results back to a user terminal; the expert terminal proposes cultivation suggestions according to the relevant transmitted data and returns the data back to the user terminal. The potted flower remote testing system has the advantages that the beloved potted flowers can be detected in real time by a user, and the system and experts can provide scientific and reasonable cultivation suggestions according to the data of the flower growing environment, so that a common customer can grow flowers more scientifically and flower growing cycle is greatly prolonged.

The invention relates to a method for detecting the cleanness of a compressed air pipeline of an offshore oil platform. The method is used for measuring granularity grades of water, oil and solid in compressed air of an instrument of the offshore oil platform and specifically comprises the following steps: preparing before detecting, firstly, blowing off compressed air for about 5min according to a theoretical calculated flow rate, switching off a valve; secondly, performing air sampling connection; thirdly, performing dew point detection, detecting a water content of the compressed air of the instrument, firstly connecting a gas inlet of a dew point analyzer with an air pipeline sampling hole by adopting the dew point analyzer; then performing oil detection, firstly, dismantling a tail end connecting tool, opening a pipeline, performing white light detection, ultraviolet detection and wiping inspection; and finally detecting air particles, detecting particles of the compressed air, and performing three times of sampling by adopting an air particle detector. The method has the advantages that simplicity is realized, the concentrations of water, oil and solid particles in the compressed air can be accurately detected, and detection results meet the standard requirement of ISO8573.1.

The invention provides a UAV based electromagnetic wave detection device and method for corona discharge of a power transmission line. The detection device comprises a UAV, an RF detection module, a UV detection module and a host computer, the UAV is connected with a remote controller, the RF and UV detection modules are fixed on a support of the UAV, the host computer is provided with a wirelesscommunication module, a single-chip microcomputer and first and second display modules, the RF detection module is connected with the first display module via the wireless communication module, the UVdetection module is connected with the single-chip microcomputer via the wireless communication module, and the single-chip microcomputer is connected with the second display module. According to theinvention, UV and RF electromagnetic waves of different wave bands are detected and analyzed via the UAV, the discharge state of the power transmission line can be evaluated, the service life of theline is pre-estimated, hidden troubles are discovered, guarantee is provided for stable power supply of a power system, faults caused by hidden troubles of the power transmission line are reduced, loss is reduced and power supply is guaranteed.

A method and apparatus for monitoring the condition of the thermal barrier coating on turbine blades and vanes is provided. The coating is monitored with ultraviolet sensors which can detect ultraviolet radiation emitted from electrical discharges and glow coronas at the surface of the blades and vanes. Such electrical glow discharges and coronas are the result of friction electricity found at the surface of blades and vanes, and are also due to the high pressure, temperature and velocity conditions within the turbine. As the thermal barrier coating deteriorates, the electrical discharges and glow coronas and associated UV emissions decrease in magnitude or have other characteristic changes, thus permitting monitoring of the corona to detect changes in the coating over time.

An ultraviolet ray detector comprises an optical filter, an ultraviolet ray sensor, a signal amplification circuit, a photosensitive diode, a singlechip and an LED display. The optical filter is connected with the ultraviolet ray sensor; the photosensitive diode is connected with the ultraviolet ray sensor in parallel and connected with the signal amplification circuit in series; and a signal amplified through the signal amplification circuit and processed through the singlechip is output to the LED display. With the above structure, the optical filter filters out light source except the ultraviolet ray, an ultraviolet signal is detected by the ultraviolet ray sensor, amplified through the signal amplification circuit and sent to the singlechip for analysis and processing, and processed data is transmitted to the LED display for display, therefore, the value of the ultraviolet ray intensity can be seen, thereby achieving the purpose of conveniently and quickly detecting the intensity of the ultraviolet radiation of indoor lighting lamps.

A potted flower remote detection system with drip irrigation device and multiple detection devices is characterized in that a temperature-humidity detection device monitors the temperature and humidity of flower growth environment and the humidity of soil; when the soil humidity is smaller than a set value, the drip irrigation device automatically starts to supply water to the soil; a camera captures images of flowers, and an ultraviolet detection device detects light intensity; related detected data is uploaded to a background server through a wireless router and the internet, and the background server analyzes the related data and transmits the data to an experts terminal; the background server returns analysis results to a client; the experts terminal make planting suggestions according to the returned related data and returns the suggestions to the client. The potted flower remote detection system has the advantages that potted plants can be detected in real time, and the system and experts can provide scientific, reasonable planting suggestions according to the data of the flower growth environment; the drip irrigation device is capable of automatically supplying water so that flower withering since watering is forgotten is avoided, and flower growth cycle is prolonged greatly.

A flame detection method capable of detecting a flame simply and effectively by using a UV detector having a comparatively small detection wavelength area. A plurality of spontaneously emitted light intensities having the same radical species but different wavelengths are measured respectively out of a spontaneously emitted light spectra of a UV area in the spontaneously emitted light components of a flame to determine emitted light intensity ratios that are mutual ratios between the measured spontaneously emitted light intensities with respective wavelengths, and a flame is detected based on the relations between those emitted light intensity ratios and flame temperatures or the relations between emitted light intensity ratios and air ratios of mixed air used for combustion. Especially, the OH zone spectrum of electron transition A<2>∑<+>->X<2>Pi from an excited state by combustion to a normal sate out of flame spontaneously emitted light components by lean combustion is measured, and emitted light intensity ratios between OH (2,0) in the vicinity of wavelength 260 nm, OH (1,0) in the vicinity of wavelength 280 nm, OH (2,1) in the vicinity of wavelength 287 nm, and OH (0,0) in the vicinity of wavelength 306 nm are determined to detect a flame state.

The invention discloses a method for synthesizing hollow molecularly imprinted polymer through a silicon dioxide matrix sacrifice method, belonging to the technical field of analysis and detection. In order to find a way of scientifically and accurately detecting and quantifying excessive residues of FQs (Fluoroquinolones) on animal derived food such as farm animals, fowls and aquatic animals, the silicon dioxide matrix sacrifice method is adopted for synthesizing the hollow molecularly imprinted polymer, namely, a silica gel template sacrifice method is adopted, the hollow material with high mass transfer kinetics, high selectivity and high appetency is synthesized as an adsorbent to enrich and selectively separating FQs drugs, and a very good effect is obtained by combining the method with HPLC-UV detection.

An ultraviolet sensor includes a silicon photodiode array having a plurality of first pixel regions and a plurality of second pixel regions. A filter film is disposed on each of the first pixel regions so as to cover each first pixel region, except on each second pixel region. The filter film lowers transmittance in a detection target wavelength range in the ultraviolet region. Each of each first pixel region and each second pixel region includes at least one pixel having an avalanche photodiode to operate in Geiger mode, and a quenching resistor connected in series to the avalanche photodiode. Each of the quenching resistors in the plurality of first pixel regions is connected through a first signal line to a first output terminal. Each of the quenching resistors in the plurality of second pixel regions is connected through a second signal line to a second output terminal.

Chromatographic separations are often characterized by multiple detectors though which the sample flows serially. As the sample flows between detectors, it becomes progressively diluted due to mixing and diffusion. This phenomenon is traditionally called “band broadening” and often results in significant distortion of the calculated physical properties such as molar mass and size. This is particularly true for the case of monodisperse samples such as proteins. A new procedure is described whereby most types of band broadening may be corrected resulting in more accurate calculations of such physical properties. The conventional means for correcting band broadening effects is based upon mathematical procedures that attempt to narrow the broadened peak to its prebroadened form. Such procedures are notoriously unstable and often result in unphysical results such as ringing, negative concentrations, or negative scattered intensities. This disclosure describes a method to characterize the broadening present in a chromatographic system, and an algorithm whereby the narrow peaks of the upstream detector are artificially broadened so that they can be compared to the broadened peaks of the downstream detector. Although the technique results in some loss of resolution, its stability and generality allow it a broad range of application. Examples include correction of RI detector broadening following MALS detectors, correction of MALS broadening following UV detection, correction of viscometric broadening following both MALS and RI detection, and all permeations thereof.