88results about How to "Wide transmission range" patented technology

The invention discloses 2-micron luminous rare-earth ion-doped germanate laser glass and a preparation method thereof. The mol percentage composition of the glass is as follows: 60 to 65 percent of GeO2, 15 to 20 percent of BaF2, 2 to 13 percent of Ga2O3, and 2 to 13 percent of Re2O3ReF3; wherein, Re is the rare-earth elements of La, Yb, Tm and Ho. The rare-earth ion doping mode of the glass is: single doping of Tm, double doping of Yb and Tm, double doping of Yb and Ho, double doping of Tm and Ho, or three doping of Yb, Tm and Ho. Rare-earth ions are introduced in the form of rare earth oxides or rare earth fluorides and can all obtain the glass with stability and excellent luminous performance. Test result shows that the germanate glass in the invention has higher transmission rate and wider transmission range. A fluorescence spectrum test shows that the germanate laser glass of the invention can obtain excellent fluorescence emitting approaching to 2-micron. The laser glass of the invention is also suitable for preparing 2-micron optical fiber perform cores.

The invention provides a coal mine tunnel roof stress online monitoring system based on a fiber grating sensor and a method thereof, and is suitable for the field of tunnel mine pressure monitoring. The coal mine tunnel roof stress online monitoring system based on the fiber grating sensor comprises monitoring and observation stations which are arranged on the roof of the tunnel of the two sides of a coal face. Each monitoring and observation station comprises three roof stress monitoring devices. The roof stress monitoring devices in each monitoring and observation station are connected in series together through communication optical fibers. The tail fiber of the lead-out end optical fiber of the monitoring and observation station of each tunnel tail end is connected with an optical fiber terminal box through the communication optical fiber. The optical fiber terminal box is connected with a fiber grating static demodulator arranged on the ground through a transmission optical cable for mining. The fiber grating static demodulator is connected with a monitoring computer and a network server in turn. The network server is connected with multiple client sides through a coal mine local area network. The coal mine tunnel roof stress online monitoring system is high in measurement accuracy and long in the service life so as to realize real-time online monitoring of the coal mine tunnel roof stress.

The invention discloses an infrared second-order nonlinear optical crystal material CsHg1.5I4 and a preparation method and application thereof. The crystal space group of the optical crystal material is Cm. The optical crystal material has the advantages of large phase-matchable second-order nonlinear optical coefficients, large light-transmitting widows in a visible region and an infrared region, high thermal stability, simple operation of a synthesis method, short reaction time, moderate experimental conditions and high purity of products; in addition, high-quality and big-size crystals can be produced through a simple method of solvent volatilization; thus the optical crystal material can be widely applied in the optical field.

This inventive infrared ray transmitting glass (gallate glass) is composed of (by mol percentages): Ga2O3:5-40, MO/MCO3:30-70,MF2/MCl2:0.1-25,Me2O3:0-24. During the smelting, introduced are: dry air, CC14, GeC14, C12, SOC12, one or more of these kinds, to effectively lower the harmful content of hydroxyl. The glass has its cut-off wavelength longer than 6um, and has advantages of: low glass phonon energy, better glass formation property, excellent mechanical property, high optical quality, low hydroxyl content, suitable for making plane sensor window, scout plane window, automobile window, head cover of missile, optical fiber of infrared ray laser, substrate glass of optical fiber amplifier.

The invention relates to an inorganic compound Na2Sn(IO3)6 as well as a preparation method and application thereof. The chemical formula of the compound is Na2Sn(IO3)6 and belongs to a hexagonal system, the space group is P63, and the unit cell parameters are shown in the specification, and the unit cell volume is shown in the specification. The colorless acicular Na2Sn(IO3)6 crystal is prepared by using a hydrothermal method. The powder frequency-double effect of the Na2Sn(IO3)6 crystal is 12 times of that of KH2PO4, and the ultraviolet cutoff edge of the Na2Sn(IO3)6 crystal is about 300nm.

The invention discloses an inorganic crystal compound Rb2BiI5O15 as well as a preparation method of the compound and an application of the compound as a second-order nonlinear optical crystal material. The material has the outstanding characteristics as follows: RbIO4, RbCl, Bi2O3 and H5IO6 are taken as initial reactants for the first time and the material is prepared by adopting a hydrothermal method; a relatively good second-order nonlinear optical effect capable of being subjected to phase matching is obtained; very large light-transmitting windows are formed in a visible light region and a mid-infrared light region; a band gap is relatively large and the thermal stability is relatively good; a synthetic method is easy to operate, high in raw material utilization rate, mild in experimental conditions and high in product purity; the crystal material can be widely applied to the field of optics.

A zinc gallium oxide ceramic target used for sputtering and electrically conductive transparent film is prepared through mixing zinc oxide powder with gallium oxide powder, cold die pressing and sintering. Its advantages are simple process, low cost and high stability of performance. The said film has excellent photoelectric performance, so it can be used as the electrode of solar cell.

The invention discloses an inorganic infrared non-linear optical crystal material. In the inorganic infrared non-linear optical crystal material, the molecular formula is Hg2BrI3; the crystal space group is Cmc21; a is equal to 4.698 (1) angstroms; b is equal to 7.2246 (6) angstroms; c is equal to 13.520 (1) angstroms; alpha, beta and gamma are the same and equal to 90 o; and Z is 4. The inorganic infrared non-linear optical crystal material has high second-order non-linear optical coefficients capable of performing phase matching, big light-transmitting windows in ultraviolet, visible light and infrared regions and high thermal stability. A synthetic method of the inorganic infrared non-linear optical crystal material comprises the following steps of: adding HgBr2 and HgI2 in a molar ratio of 2:1 into acetone to dissolve; stirring at the temperature of between 30 and 50 DEG C for 8 hours; and after the reaction is finished, placing at room temperature to naturally volatilize the solvent to obtain a yellow transparent crystal. The crystal material can be widely applied in the fields of optics and the like.

The invention discloses a dynamic building fire escape response method. The method employs a dynamic building fire escape response system, and the dynamic building fire escape response system comprises a composite fire detector, a voice alarm, a watering device, an escape indicating lamp, an in-building server, an out-building server, a mobile phone and a water pressure detection device; an emergency Bluetooth communication module is arranged on the escape indicating lamp; the in-building server analyzes the fire behavior through the data collected by the composite fire detector, formulates anescape channel route and sends the escape channel route to the mobile phone, and then controls the escape indicating lamp to indicate an escape path to help escape personnel to escape; the out-building server communicates with the mobile phone and the escape indicating lamp. A dynamic escape personnel distribution diagram is drawn, the out-building server draws a dynamic building fire behavior state diagram according to the dynamic escape personnel distribution diagram in combination with the water pressure data of the output end of the water spraying device and the spraying state diagram, the fire-fighting situation in an escape passage is provided for firefighters, the fire behavior situation of the building is known, and rescue and fire fighting are facilitated.

The invention relates to a low-power spread-spectrum wireless communication module which comprises a radio-frequency chip, a single chip microcomputer, a power circuit, a crystal oscillation circuit, a radio-frequency circuit, and an antenna. The radio-frequency chip and the single chip microcomputer perform SPI communication. The power circuit inputs a voltage to the single chip microcomputer and the radio-frequency chip. The radio-frequency chip and the antenna are connected by the radio-frequency circuit. The output of the crystal oscillation circuit is sent to the single chip microcomputer. The radio-frequency circuit consists of a radio-frequency signal receiving circuit and a radio-frequency signal transmitting circuit. The single chip microcomputer is an STM8 single chip microcomputer. The invention further discloses a low-power spread-spectrum wireless communication method. The module and the method have the advantages as follows: the power consumption and cost are low, the network transmission efficiency is improved, and interference is reduced; a wider transmission range and a longer transmission distance are achieved, zero-fee data transmission is realized, and only power supply by batteries is needed; and specific Internet-of-things enterprises can build a low-power wide-area network through the low-power wireless communication module to remotely receive data collected by a sensor.

Disclosed are ophthalmic device materials having improved light transmission characteristics. The materials contain a combination of certain UV absorbers and blue-light absorbing chromophores.

The invention discloses an intelligent valve remote control system and a working method thereof and relates to the field of remote control of valves. The invention provides the intelligent valve remote control system and the working method thereof, which are smart in structure, low in operation difficulty and low in cost, and can timely find out and feed back abnormal conditions of a valve in use, so that people can quickly make a judgment and timely give commands to electric execution mechanisms. The electric execution mechanisms are used for driving the valve and communicate with a signal collecting device, a monitoring center communicates with a telecommunication base station by wireless information, a plurality of mobile phone clients communicate with the telecommunication base station by the wireless information, a plurality of the electric execution mechanisms communicate with the telecommunication base station by the wireless information, and the electric execution mechanisms are in one-to-one correspondence to the mobile phone clients. The system and the method have the characteristics of being wide in transmission scope, convenient in communication, simple to use, easy to popularize and the like.

The invention discloses a novel inorganic compound K2BiI5O15, and a preparation method, properties and application thereof as a second-order nonlinear optical crystal material. The outstanding characteristics of the material are that KIO4, KCl, Bi2O3 and H5IO6 are adopted as initial reactants for the first time to prepare the material in a hydrothermal method; the material has a stronger phase-matching second-order nonlinear optical effect, a broad light transmitting window in the visible region and the middle infrared region, a larger band gap and higher heat stability; the preparation method is easy to operate, high in raw material utilization rate, mild in experiment condition and high in product purity; the crystal material can be widely applied in the field of optics.

A mobile ad-hoc routing apparatus includes a first communication module and a second communication module configured to transmit and receive data through a first communication band and a second communication band, respectively, a memory configured to store a program for transmitting and receiving the data, and a processor configured to execute the program stored in the memory, wherein when the program is executed, the processor receives first control information broadcast by one or more neighboring nodes via the first communication module and stores the first control information in the memory, wherein the first control information includes current position and communication status information of the neighboring node, the processor updates information on the neighboring node on the basis of the first control information, generates packet forwarding information which includes information on a node which currently allows packet data to be transmitted based on the updated information on the neighboring node, and stores the generated packet forwarding information in the memory, and the processor determines a subsequent node which allows the packet data to be transmitted to a destination node on the basis of the packet forwarding information and transmits the packet data to the subsequent node via the second communication module.

The invention discloses a GPRS monitoring system for remote monitoring and managing of a tower machine, which comprises a preposed meter, a server, a database and a web management center. The GPRS monitoring system is characterized in that: the preposed meter which is arranged on the site of the tower machine comprises a sensor, a signal collecting and processing module, an MCU (micro controller unit), a hand-held debugging keyboard, a power supply module, a GPRS transmitting module, a protection output module, a data storage module and a display module; the sensor transmits detected data to the signal collecting and processing module for DAC (digital-to-analogue conversion) and then transmits the detected data to the MCU, the protection output module compares the actually detected data with a set value and then judges whether to carry out security protection control, the GPRS transmitting module transmits data in the MCU, and then the server transmits the data onto the Internet after carrying out statistical processing on the data. The GPRS monitoring system utilizes the Internet to realize the monitoring management for the tower machine at any time anywhere. Therefore, the GPRS monitoring system is safer and quicker, and is more convenient for use.

The invention relates to an inorganic compound Li2Sn(IO3)6 as well as a preparation method and use thereof. The chemical formula of the compound is Li2Sn(IO3)6; the compound belongs to a hexagonal crystal system, the space group is P6<3>, cell parameters are that a and b are equal to 9.4589(4) angstrom respectively, c is equal to 5.1707(4) angstrom, Alpha and Beta are equal to 90 degrees respectively, gamma is equal to 120 degrees, and Z is equal to 1; crystal cell volume V is equal to 400.65(4) cubic angstrom; colorless needlelike Li2Sn(IO3)6 crystal is prepared by using a hydrothermal method. The powder frequency-doubled effect of the Li2Sn(IO3)6 crystal is 15 times of that of KH2PO4, and ultraviolet stopping side is about 304 nanometers.

The invention discloses a rubidium lithium titanium germanate compound, a rubidium lithium titanium germanate non-linear optical crystal and preparation methods and application thereof. A chemical formula of the rubidium lithium titanium germanate compound is Rb4Li2TiGe4O13; a chemical formula of the rubidium lithium titanium germanate non-linear optical crystal is Rb4Li2TiGe4O13; the rubidium lithium titanium germanate non-linear optical crystal is non-centrosymmetrical structure, belongs to the tetragonal system and has a space group P4nc, is prepared by adopting a co-solvent method. The invention further discloses the rubidium lithium titanium germanate non-linear optical crystal to application of a laser non-linear optical compound functional device, an electro-optical crystal device or a laser device. The rubidium lithium titanium germanate non-linear optical crystal provided by the invention has a relatively great non-linear optical effect, a high electro-optical coefficient anda wide transmission range, has good mechanical properties and does not deliquesce; the frequency-doubled effect is 3 to 5 times of KDP (potassium dihydrogen phosphate).

Disclosed is a household Internet of things system based on a Bluetooth technology. The system comprises a household electrical appliance and a control terminal, wherein the household electrical appliance is provided with a controlled apparatus for receiving Bluetooth signals; and the controlled apparatus comprises a Bluetooth receiving apparatus and a control apparatus for controlling the household electrical appliance. The system further comprises a Bluetooth signal emission apparatus and an Internet of things service platform for providing communication interfaces for the Bluetooth signal emitter and the control terminal. The Bluetooth signal emission apparatus comprises an Internet of things application module for controlling the household electrical appliance and processing data sent by an intelligent household service platform. According to the invention, by use of the Bluetooth4.0 technology, the household Internet of things system has the advantages of wide transmission scope, low power consumption small human radiation and the like, is quite suitable for application of household Internet of things, and brings little radiation harm on household members.

The invention discloses a middle-infrared nonlinear optical crystal material. The chemical formula of the crystal material is KBi4F13, the crystal space group of the material is I-4, and cell parameters are characterized in that a is 0.92027(19)nm, b is 0.92027(19)nm, c is 0.62589(13)nm, alpha = beta = gamma = 90DEG, and Z is 2. The invention also provides a hydrothermal preparation method of the crystal material. The middle-infrared nonlinear optical crystal material prepared in the invention has a phase matching second harmonic generation (SHG) effect, and a Kurtz powder frequency multiplication test result shows that the powder frequency multiplication effect of the crystal material is same to that of potassium dihydrogen phosphate (KDP); the laser damage threshold of the powder is 120MW/cm<2>, and is above 23 times the laser damage threshold of present commercial middle-infrared nonlinear optical crystal materials AgGaS2; the middle-infrared nonlinear optical crystal material has a wide permeable range in visible light region and middle-infrared light region; the middle-infrared nonlinear optical crystal material has the advantages of no crystal water, stability to air, and good heat stability; and monocrystalline materials can be prepared through the hydrothermal method.

The invention discloses mid-infrared nonlinear optical crystalline materials, a preparation method therefor and an application of the mid-infrared nonlinear optical crystalline materials. Chemical formulae of the mid-infrared nonlinear optical crystalline materials comprise RbCdI3.H2O and CsCdI3.H2O, and both crystal space groups of the chemical formulae are Pc. During preparation, the two kinds of nonlinear optical crystalline materials, i.e., RbCdI3.H2O and CsCdI3.H2O can be obtained through dissolving RbBr(CsBr) and CdI2 in a mixed solution of acetone and water and carrying out preparing byadopting a solution method. The two kinds of nonlinear optical crystalline materials disclosed by the invention have a relatively high phase-matchable second-order nonlinear optical effect, have relatively wide light transmitting windows in a visible light zone and an infrared light zone and have the advantages that the laser damage threshold is relatively high, the synthesis method is simple inoperation, the experimental conditions are moderate, the product purity is high, the nonlinear optical crystalline materials are stable to air, and the like, thereby being capable of being extensivelyapplied to the field of optics.