391 results about "Tungsten lamp" patented technology

A lightwave oven for cooking with light having wavelengths in the visible, near visible, and infra-red spectral ranges uses one or more quartz halogen tungsten lamps or quartz arc bulbs positioned above and below the food item and delivers light energy in select ranges of the electromagnetic spectrum during select portions of the cooking cycle.

This invention relates to a preparation method for Cu In Ga Se or CuInGaS solar energy battery absorption layer, which prepares a CuInGa metal prefabricated layer with a vacuum magnet control sputter method on a NaCa glass Mo substrate then to be pre-evaporated in a thermal process vacuum chamber to be selenized or sulfurized characterizing that the target material applied in the vacuum sputter method is CuIn alloy or CuGa alloy or CuInGa alloy, the selenization or sulfurization is carried in vacuum, which rises the temperature of Se or S source to make them evaporate to spread a layer of Se or S on the prefabricated surface to be radiated by a halogen-tungsten lamp to generate selenized or sulfurized chemical reaction to get the CuInGse or GuInGs absorption layer.

The present invention relates to an endurable decoration light string of light strings and one or more non-electrical connector. The light string includes mutually connective luminaries and electrical connector, in which the luminaries are composed of luminescent elements including lamp bulb, tungsten lamp, LED and lamp holder. Electrical conductor can be single or multiple wires, and uses the non-electrical connector parallel or by winding to fix on the predetermined fixed position of the head and tail ends and center part of the decoration light string, to tie a knot on the predetermined fixed position to enhance endurable strengthen of decoration light string. Thus, during the arrangement, the draw force of the decoration light string will be firstly supported by non-electrical connector to avoid the damage on the decoration light string and increase the life span on the decoration light string.

A method for generating low color temperature light and a light emitting device adopting the same, comprise a LED component, phosphor capable to be excited by the emission light of the LED component, and a package colloid for encapsulating the LED component and the phosphor, wherein the package colloid is provided with a electrode lead for connecting the LED component with the external power supply, the peak wavelength of emission light of the LED light is 460-500 nm, the peak wavelength of emission light of the excited phosphor is 580-630 nm. The present invention only use one chip and one kind of phosphor to generate the low color temperature light which is of the same effect as that of the minitype tungsten lamp or the high pressure sodium lamp, and is of advantages including energy saving, low cost and environmental protection, etc. The present invention can be widely used in the manufacturing process of LED lamp of low color temperature, especially in the manufacturing the mini LED bulb.

A method and apparatus are provided for treating dermatological conditions, in which a first beam of radiation is used to ablate a hole in skin tissue, and a second beam of radiation is directed into the hole and onto a region of skin tissue adjacent to and / or at the bottom of the hole. The first beam can be provided by an ablative laser such as a CO2 laser or an ER:YAG laser. The second beam can be provided by, e.g., an ablative laser operating at a lower peak power level than the first beam, a non-ablative laser, a flashlamp, a tungsten lamp, a diode or a diode array. A controlled amount of thermal damage can thereby be provided at a desired depth within the skin, using radiation sources that would be absorbed closer to the surface of the skin if an ablated hole were not present. Cooling and / or freezing of the skin prior to ablation can be provided to provide an analgesic effect and / or stabilize the tissue surrounding the ablated hole. The region of skin to be treated can optionally be pulled towards the radiation source using a vacuum to stretch and / or stabilize the skin tissue surrounding the volume to be ablated.

A spectrometer includes: a tungsten lamp which emits light with no peak wavelength within a wavelength range of visible light and having a light amount increasing as the wavelength becomes longer; a violet LED which emits light having a peak wavelength within the wavelength range of visible light; a light mixer which mixes light emitted from the tungsten lamp and the violet LED; an etalon which receives light mixed by the light mixer and transmits light contained in the received mixed light and having a particular wavelength; a light receiving unit which receives light transmitted by the etalon; and a measurement control unit which changes the wavelength of light that can pass through the etalon and measures spectral characteristics of the light having passed through the etalon based on the light received by the light receiving unit.

The invention discloses a high and low temperature vacuum lunar soil environment simulator, which comprises a high and low temperature vacuum environment simulator including a simulant lunar soil containing device and a vacuum tank; a low temperature refrigeration cycle device; a diffusion pump; a mechanical pump and a heating component; the simulant lunar soil containing device is provided with a lunar soil drum for containing simulant lunar soil, and the location of the simulant lunar soil containing device is trimmed by a mobile platform; the simulant lunar soil containing device is arranged in the vacuum tank; the vacuum tank is vacuumized by a vacuum tube through the diffusion pump and the former mechanical pump; the low temperature refrigeration cycle device can refrigerate the lunar soil by a purple copper pipe which is designed on the wall of the lunar soil drum and is internally provided with a freezing medium; the surface of the simulant lunar soil is heated by an iodine-tungsten lamp arranged above the lunar soil drum. The high and low temperature vacuum lunar soil environment simulator has the advantages that daytime high temperature or night low temperature environment of surface-layer lunar soil and low temperature environment of deep-layer lunar soil under vacuum conditions can be simulated, and the high compactness of 1.9g / cm3 and moisture content less than 0.1% of the simulant lunar soil can be ensured.

A method and apparatus for nanoscopy comprising a salt microlens. The microlens-based nanoscope comprises a conventional microscope, a microlens, and a XYZ piezoelectric stage is shown (SEE FIG. 1A). The microlens is mounted on a Z-stage and can be driven to accomplish the scanning. The specimen is placed above the microlens which is a plano-convex lens. The set up employed for the Salt Microlens for Ultra-high Resolution Imaging (SAMURI) can use a halogen-tungsten lamp with a dominant wavelength at 600 nm. A magnified virtual image of the specimen is obtained when the distance between microlens and specimen is less than the focal length of the microlens. The virtual image can then be magnified by the microscope and captured by eyes or a CCD camera.

A system, method and apparatus are provided for treating dermatological conditions by generating a relatively large amount of thermal damage beneath a skin surface while generating relatively little thermal damage to the skin surface and / or epidermis. For example, the exemplary system, method and apparatus provide for directing a radiation beam onto a target location on the skin surface to thermally damage a volume of tissue beneath the target location, and directing a second radiation beam onto the same target location to thermally damage a different volume of tissue beneath the target location. The radiation beams may include ablative and / or non-ablative laser beams, or they may be generated by, e.g., a flashlamp, a tungsten lamp, a diode, or a diode array. The two beams may be pulsed. Further, they can be part of a single continuous wave beam, which can be rotated around an axis which passes through the target area, or which can be directed at a plurality of angles with respect to the skin surface.

The invention discloses a single-circuit fast temperature-control experiment teaching device, which comprises a controlled object, a sensor, a temperature transmitter, an intelligent regulation instrument, a pressure regulating module and an upper computer, wherein a heat source adopts a halogen tungsten lamp, and can realize rapid warming and cooling; the intelligent regulation instrument is connected with the upper computer through an RS232 communication port so as to realize output of controlled quantity; the upper computer is provided with a configuration software; and through adjusting PID (Proportion Integration Differentiation) parameters, a system can have good dynamic property indexes, and real-time and historical data and curves of the system can be recorded. The single-circuit fast temperature-control experiment teaching device well simulates an automatic operation and management platform in an industrial process, not only can meet the requirement of an undergraduate student on a process control experiment, but also provides an experiment platform for intensive study of graduate students, has a simple and reasonable structure, is convenient to operate and maintain, and can be widely applied to student experiments.

The present invention relates to a spectrophotometer for quickly measuring optical spectrum. It includes a light source, on the main optical path of light source output successively are set spectrophotometric system, colour wheel, third reflecting mirror, concave reflecting mirror, diffraction grating, slit and receiver, the output end of said receiver is connected with a data processor and a controller. It is characterized by that the described light source is formed from a broad spectrum halogen tungsten lamp, a deuterium lamp and switchover type first half-transmitting half-reflecting mirror on the optical path of light source output. The described slit is positioned between the described light source and second half-transmitting half reflecting mirror, and between the slit and second half-transmitting half-reflecting mirror also is set a collimating composite lens, and between the described concave reflecting mirror and the described receiving system also is set a convergent lens, and the described receiver is an array of CCD.

The invention discloses a device and method for detecting optical property parameters of agricultural products in a continuous spectrum. A light source is installed on a light source moving device, a spectrograph is connected to a rotary connection ball cover of an integrating ball through an optical fiber, a sample table, the light source moving device and a ball cover opening-and-closing device are connected with a motion control box, and the spectrograph and the motion control box are connected to a computer. A light source part, the integrating ball and the ball cover opening-and-closing device are installed on the same straight line, it is guaranteed that the ball cover of the integrating ball can be attached to a light beam outgoing opening of the integrating ball, and an optical fiber cladding cylinder and a light beam incident opening of the integrating ball are coaxial. A sample clamping hole installed in the sample table can be coaxially moved between the light source part and the light beam incident opening of the integrating ball or can be coaxially moved to the light beam outgoing opening of the integrating ball. The value of the total reflectivity Rt and the value of the total transmittance rate Tt are measured, and the values and the value of the fixed anisotropy coefficient g are combined to be substituted into a reverse multiplication algorithm to calculate and obtain the optical property parameters. According to the device and method, a halogen tungsten lamp is used, more optical property information can be obtained, and detection accuracy is improved.

The invention discloses a preparation method and application of a high-efficiency ultraviolet visible full-spectrum photocatalytic material and relates to a preparation method of a nano material which is doped with bromine and / or iodine and uses bismuth oxychloride as the matrix. The invention prepares the novel core-shell structured high-efficiency ultraviolet visible full-spectrum halogen-doped bismuth oxychloride photocatalytic material for the first time. The technical scheme is characterized in that the photocatalytic material has extremely high catalytic efficiency under the irradiation of a filament lamp, an iodine tungsten lamp, a daylight lamp and sunlight; the photocatalytic material has a wide catalytic degradation range and can carry out high-efficiency visible light catalytic decomposition on researched organic pollutants such as rhodamine B, methylene blue, methyl orange, 2,4,6-trichlorophenol, formaldehyde and the like; the degradation efficiency of the catalyst on the typical organic pollutant rhodamine B is up to 91% after the irradiation of sunlight for 10 minutes; the catalyst can be directly added to the paint to perform photo-absorption or degradation on formaldehyde and other harmful gases generated by interior finish and furniture; and the preparation method has the advantages of simple and convenient operation, energy saving and environment friendliness, thereby being applicable to large-scale industrial production.

A non-constructive detection method for dyes on textile antique comprises following steps: (1) connecting a composite light source composed of deuterium lamp and halogen tungsten lamp, a micro fiber optic spectrometer and a diffuse reflection device to a portable computer; (2) running the spectrometer software, adjusting the angle and height of the optic fiber probe and correcting the spectrometer with a standard white board; (3) putting the sample to be detected under the optic fiber probe ( the distance is about 1 cm), adjusting the integration time according to the strength of the spectral signals and obtaining a ultraviolet-visible spectrum of the dyes; (4) saving the spectrogram of the sample to be detected, comparing to a standard dye spectrogram, and identifying the sorts of the dyes. Compared to the prior art, the non-destructive detection method has the advantages that: the method is suitable for dye detection under various environments, the sorts of dyes can be identified without sampling, categories of various natural dyes can be precisely identified by the method, and the method also provides basic data for the color protection of textile antiques.

The invention discloses an LED-based intelligent color assessment cabinet. A combination of an LED light source and a tungsten lamp is used as a light source for color assessment lighting, and the color assessment light source more excellent in coloring characteristic is obtained by means of combination of spectral power distribution characteristics of the LED light source and the tungsten lamp; since a color filter is arranged in front of the tungsten lamp, more optimized spectral power distribution is obtained to further optimize the coloring characteristics of the color assessment light source. By the aid of light-emitting relative spectral powder distribution data, prestored in a memory unit under drive of different currents or pulse widths, of the LED light source or the tungsten lamp, all types of standard lighting sources can be simulated more accurately, and color assessment realness and reliability are improved.

The invention discloses a rapid absolute radiometric calibration method for a push-broom dispersion type imaging spectrometer. According to the rapid absolute radiometric calibration method, a tungsten lamp and an xenon lamp are combined so as to be adopted as light sources, and the brightness ratio of the two kinds of light sources can be adjusted so as to obtain light sources with different spectral characteristics, and therefore, the defect of low brightness in shortwave bands when only the tungsten lamp is adopted as a light source can be eliminated; and in an acquisition process, the brightness ratio of the tungsten lamp and the xenon lamp can be adjusted for many times, which does not require precise control and only requires certain change of the brightness ratio to be ensured, and therefore, the adjustment can be completed in a short time period, and the responses of the imaging spectrometer are tested respectively, and a standard spectral radiometer is utilized to perform monitoring; the data acquisition mode can provide a plurality of groups of data with different spectral characteristics, and preferred data can be selected from the plurality of groups of data with different spectral characteristics when absolute radiometric calibration coefficients are calculated; and finally, when the absolute radiometric calibration coefficients are calculated, one group of data to which the imaging spectrometer highly respond is selected from experimental data, and therefore, calibration accuracy can be guaranteed, and the whole calculation process is completed by a computer, and therefore, calculation efficiency can be ensured.

The modular LED retrofit lamp system includes a high-power LED light engine, together with an integrated optics mount, an integrated yet serviceable LED dimmable driver, and a point of attachment on the center area of the engine for mounting the LED engine. Different mounts for the engine can include, but are not limited to, PAR56, PAR46, PAR64, PAR38, Mini Candelabra, Intermediate Screw Base, Mogul Screwbase, and Fresnel-based Theatrical Fixtures. One LED light engine can replace a wide range of tungsten lamps ranging up to 500 watt equivalents in output performance, as well as dimming performance. Additional brackets and lamp sockets easily retrofit into an existing lighting fixture, while dimming capabilities are retained.

The invention belongs to the field of biotechnologies, and relates to a breeding chamber, in particular to a breeding chamber for cultivating hermetia illucens. The breeding chamber comprises an outer layer cage chamber, an inner layer cage chamber, potted plants, a sunshade net, an iodine-tungsten lamp for providing light, an automatic spraying device for keeping humidity in the breeding chamber and a heater for keeping temperature in the breeding chamber to be constant. By the utilization of the breeding chamber, hermetia illucens can be massively bred at any season, labor cost is low, and the egg laying amount is large.

The invention discloses a portable interior quality optical detection probe for thick-skin type fruits. The portable interior quality optical detection probe comprises a spectral emitting device and a spectral receiving device which are coaxially mounted, wherein a heat dissipation lampshade is arranged in a ventilating cover; a halogen tungsten lamp is attached between the heat dissipation lampshade and an outer barrel; a plane mirror and the spectral receiving device are arranged in the outer barrel; the plane mirror is adhered to the top of an inner barrel cover and is aligned with the center of the halogen tungsten lamp; a mirror seat in an inner barrel is connected with the inner barrel cover; the elliptical plane mirror is adhered to a slope surface of the mirror seat; three inner fixing cylindrical holes in a cylinder on the outer side of the middle part of the inner barrel and three outer fixing cylindrical holes in a cylinder on the outer side of the middle part of the outer barrel are relatively formed, so that the inner barrel and the outer barrel are coaxially fixed; an optical fiber connection opening of the inner barrel and an optical fiber through hole of the outer barrel are butted and provided with optical fibers. The light source of the halogen tungsten lamp is integrated on the probe, so that the interior quality of the thick-skin type fruits can be particularly subjected to optical detection, and interior quality information of the fruits can be effectively acquired; a spectral basis can be supplied to lossless detection on the interior quality of the thick-skin type fruits.

The invention provides an LED lamp filament piece, a manufacturing method of the LED lamp filament piece and an LED lamp filament piece bulb. The LED lamp filament piece comprises a substrate, a plurality of LED wafers and fluorescent glue covering the LED wafers. The LED wafers are sequentially arrayed according to a U shape rule, are in series connection to form a U-shaped LED lamp filament and are fixedly arranged at least one side face of the substrate. A first electrode pin and a second electrode pin are arranged on the substrate, the two ends of the U-shaped LED lamp filament are electrically connected with the first electrode pin and the second electrode pin respectively. According to the LED lamp filament piece bulb, the artistic modeling of a traditional tungsten lamp is inherited, the LED lamp filament piece is used as a lighting source of the bulb, and the advantages of being saving in energy, environmentally friendly and durable are achieved. Due to the fact that the LED wafers of the LED lamp filament piece are in series connection, multiple times of welding is of no need when the LED wafers are manufactured to be the LED lamp filament piece bulb subsequently, an SMT attaching technology is simplified, production cost is lowered, and the LED lamp filament piece, the manufacturing method of the LED lamp filament piece and the LED lamp filament piece bulb are suitable for large-scale production.

The invention provides a detection system for food in a refrigerator and the refrigerator. The detection system for food in the refrigerator comprises a hyperspectral imaging device, a light source device, a detection controller and a type detection device; the hyperspectral imaging device is arranged inside a refrigerator body of the refrigerator, moreover, the shooting angle faces a detection area, the detection area is formed inside the refrigerator body and is used for containing the detected food; the light source device is also arranged inside the refrigerator body of the refrigerator, comprises a halogen tungsten lamp, and is used for providing shooting light for the hyperspectral imaging device by utilizing the halogen tungsten lamp; the detection controller is configured to acquire a type detection trigger signal and start the hyperspectral imaging device and the halogen tungsten lamp according to the trigger signal; and the type detection device is configured to recognize thetype of the detected food by utilizing hyperspectral data shot by the hyperspectral imaging device. According to the scheme, image information and spectral information are comprehensively utilized for carrying out food type recognition, and the recognition accuracy is high; and meanwhile, the halogen tungsten lamp with the wide spectral range is adopted to provide the shooting light, so that theimaging requirements are met.

The invention discloses a preparation and using method of Ag@AgI / AgBr modified TiO2 nanometer tube photochemical catalyst, which includes: dispersing TiO2 nanometer tubes in distilled water, adding 0.1mol / dm3 AgNO3 solution dropwise, and stirring for more than 30 minutes in magnetic mode; adding 0.1mol / dm3 KBr solution dropwise, stirring for more than 3 hours continuously, adding 0.1mol / dm3 KI solution, and controlling adding quantity of the AgI to be 1%-15% of that of the AgBr; finally leaching and washing repeatedly, drying for more than 12 hours at temperature of 60 DEG C to 100 DEG C, and obtaining a TiO2 nanometer tube under irradiating of a 500-watt halogen tungsten lamp; weighing 0.01-0.3g TiO2 nanometer tube photochemical catalyst, adding the catalyst into 150ml of methyl orange solution with concentration ranging from 10mg / L to 30mg / L, and dispersing in ultrasonic mode for 30 minutes; adding the catalyst into a photo-catalyst reactor, turning on a 500-watt tungsten lamp for irradiating, and separating in centrifugal mode. The AgBr and the AgI are loaded on the TiO2 nanometer tubes uniformly by using an in-situ growth method, and the catalyst has high degradation degree on the methyl orange solution, can be reused, and has the advantages of being excellent in stability and visible light response performance and the like.

The invention provides a vertical navigation aid lamp and a middle cover. The vertical navigation aid lamp comprises the middle cover (1), a front cover (2) fixed at the front end of the middle cover (1), a transparent piece (3), a reflecting cup assembly (4) and a rear cover (6) fixed at the rear end of the middle cover (1), wherein the middle part of the inner wall of the middle cover (1) is provided with a positioning part (10) used for mounting a light source assembly. The vertical navigation aid lamp can be used as an assembly structure of a halogen tungsten lamp and can be also used as an assembly structure of an LED lamp. When the light source is replaced, only the light source part is needed to be replaced, and the structures of the front cover, the middle cover, the rear cover, a sealing ring, a base, and the like can be shared, thus the waste of lamps and the increase of cost can be avoided. In addition, the front sealing ring of the vertical navigation aid lamp is provided with an annular groove which is radially and inwards opened, and the flangings of the transparent piece and the reflecting cup assembly are embedded in the annular groove, thus the cost of the sealing ring can be effectively reduced.

The invention relates to a testing system of monochromatic light path quantum efficiency. The system comprises a halogen tungsten lamp source, a convex lens, a photointerrupter; a monochrometer, the halogen tungsten lamp source, the convex lens and the photointerrupter are arranged on the light path at the inlet of input light of the monochrometer; a phase-locking amplifier the frequency reference input terminal of which is connected with the chopped wave frequency output terminal of the photointerrupter; a computer is in charge of controlling and processing the data of the monochrometer and the phase-locking amplifier, thus leading the monochrometer and the phase-locking amplifier to work coordinately; a rotary sample positioning device is arranged on the light path at the outlet of output light of the monochrometer and is connected with the phase-locking amplifier by cables, and the rotary sample positioning device can lead the sample and the standard detector to be arranged at the same place of the light path by rotating; a pair of offset light sources are arranged around the light path at the outlet of the output light of the monochrometer, and the offset light source can lead the offset light to be sprayed on the surface of the sample to be tested, thus realizing the function of a non-measuring quantum battery for a short circuit sample.

The invention discloses a performance test system for a low-illumination CMOS chip. The system comprises a halogen tungsten lamp light source, an electric slit, a first integrating sphere, an aperture-variable diaphragm, a second integrating sphere, a camera obscura, the low-illumination CMOS chip to be tested, an illumination meter and a computer, the low-illumination CMOS chip is arranged in the camera obscura, uniform light generated by a halogen tungsten lamp is input to a photosensitive surface of the low-illumination CMOS chip, the computer adjusts the electric slit and the aperture-variable diaphragm to change the illumination, exposure time of the chip is set, an image signal generated by the low-illumination CMOS chip is collected and converted into a corresponding voltage signal, and corresponding parameter values are obtained via data processing. The system can evaluate the performance of the low-illumination CMOS chip scientifically, and provides basis for research and production of low-illumination CMOS.

A spectrometer includes: a tungsten lamp which emits light with no peak wavelength within a wavelength range of visible light and having a light amount increasing as the wavelength becomes longer; a violet LED which emits light having a peak wavelength within the wavelength range of visible light; a light mixer which mixes light emitted from the tungsten lamp and the violet LED; an etalon which receives light mixed by the light mixer and transmits light contained in the received mixed light and having a particular wavelength; a light receiving unit which receives light transmitted by the etalon; and a measurement control unit which changes the wavelength of light that can pass through the etalon and measures spectral characteristics of the light having passed through the etalon based on the light received by the light receiving unit.

An intelligent control back ground lamp of TV set belonging to TV set technical field includes luminous devices and their control circuit, of which the control circuit consists of photosensitive resistance photosensing circuit, resistance / voltatge converting circuit, voltage stabilization circuit and amplifying circuit, central processor of TV set, impedance matching box, photoelectric isolator, two-way silicon controlled AC voltage regulator and series circuit of AC power source and luminous devices. The resisting / voltage converting circuit and amplifying circuit as well as impedance matching box with the be composed by arthmetic mplifiers and the photoelectric isolator will be formed by photoelectric coupler, luminous device will be one of fluorescent lamp, filament lamp of iodine-tungsten lamp and the two-way silicon controlled AC coltage regulator will be composed by one-way simplexer and two-way thyristor. According to the peripheral circumstance lightnss, the lamp lightness can be regulated autoamtically and freely by TV set or remote-controllor in order to have an indeeal screen image and to protect the sight.

The invention discloses a portable near-infrared fruit internal quality detection device with adjustable light spots. In a case, a light source part is installed on the right side of the case through a light source bracket; a detection unit is installed on the left side of the case through a detection bracket, and fruit is placed into a sample chamber in the detection unit by opening a lifting cover of the case; a rotary table of a rotary table mechanism is installed between the light source part and the detection unit; and a circuit board of a control processing unit is installed below the light source bracket, and an embedded computer of the control processing unit is installed on the upper surface of the case. The portable near-infrared fruit internal quality detection device disclosed by the invention adopts a halogen tungsten lamp as an original light source to emit a spectrum with continuous wavelength, spectral information at multiple wavebands can be acquired through optical fiber, and automatic collection of dark field, reference and fruit spectral information is achieved through the control of a steering engine on the rotary table; and the device is installed in the airtight case, so as to avoid the impact of external stray light on a detection process, and the case wall is provided with a heat dissipation fan and a heat dissipation hole, so as to ensure the temperature in the case, and improve the spectral acquisition efficiency and detection precision.

The invention discloses a device and a method for detecting a total number of bacteria on the surface of cooled mutton. The device comprises a light source, a hyperspectral imaging system and a control computer, wherein the light source is connected with the hyperspectral imaging system through optical fibers; the hyperspectral imaging system comprises a hyperspectral imaging spectrograph, a CCD camera, a lens, a halogen tungsten lamp and an electric control displacement platform; samples are placed on the electric control displacement platform; the lens is positioned above the electric control displacement platform; the hyperspectral imaging spectrograph is connected with the lens; the CCD camera is positioned above the hyperspectral imaging spectrograph; the CCD camera is connected with the control computer. The device disclosed by the invention has the characteristics of convenience in detection, rapidness and non-destructive property, and is suitable for popularization and application.