115results about How to "Wide spectrum" patented technology

The invention provides a system for analyzing and evaluating the performance and behavior of a driver of a vehicle, and for displaying the results of the analysis and evaluation. A vehicle sensor utility is used to monitor the state of the vehicle while being driven by the driver. A raw data stream from the vehicle sensor utility is input to a driving event handler that detects driving events in the raw data stream and outputs to a maneuver detector a driving event string. The maneuver detector is configured to recognize patterns of driving maneuvers. One or more ratings of the driver's driving performance are calculated based upon the driving maneuvers as executed by the driver. The ratings are displayed on a display.

The invention discloses a mine mobile communication system, which consists of an Ethernet passive optical network of a double-bus or double-loop structure, a wireless access network, a control system and an explosion-proof mobile station. The system comprises an optical link terminal, a base station controller, a ground base station, office-end equipment, passive optical splitters, explosion-proof optical network terminals, an underground explosion-proof base station, leakage antennae, base station antennae, distributed antennae and the explosion-proof mobile station, wherein the optical link terminal is connected with the ground base station and the base station controller; the explosion-proof optical network terminals are connected with the underground explosion-proof base station; the underground explosion-proof base station is connected with the leakage antennae, the base station antennae and the distributed antennae; and the explosion-proof mobile station is connected with the underground explosion-proof base station and the ground base station through a wireless interface. The mine mobile communication system has the characteristics of simple structure, flexible deployment, convenient maintenance, relatively lower cost, strong disaster resistance and anti-jamming capacity, capability of eliminating dead zones in communication and meeting requirements on a specific service environment and security for mining, and suitability for underground mobile communication in a coal mine.

Being in use for illumination, and communication to remote communication equipment (RCE), the system includes illumination communication equipment (ICE), illumination communication terminal (ICT), and communication terminal (CT). Receiving source signal from RCE, ICT converts the received source signal to light signal transmitted wirelessly in light signal mode. Converting the received light signal to electric signal, ICT transfers the electric signal to CT. receiving the electric signal from ICT, CT carries out relevant process, or sends the processed electric signal to ICT, i.e. reverse transmission. Light sent from ICE / ICT can be as light source of light wireless communication or illuminated light sources. The invention overcomes prejudice that illumination light cannot be as carrier of wireless communication. The invention is suitable to indoor, and outdoor.

The invention provides a spacing-adjustable soliton optical frequency comb system based on a micro nano resonant cavity and an adjusting method thereof. The adjusting method comprises three steps of amplifying an after-filtering pumping micro nano resonant cavity by means of a single light source, finding out a wavelength range of the pumping light which can be coupled and enter the micro nano resonant cavity, and determining wavelength range of a corresponding bistable area which is generated by solitons; generating an optical frequency comb by a single-light-source pumping resonance cavity of which the wavelength is a corresponding value when an in-chamber power which is recorded in the first step begins to increase; and finally adjusting the wavelength of the single-light-source in the second step to the wavelength which corresponds with a bistable area, simultaneously adding another light source of which the wavelength is lower than N-time FSR of the light source, coupling the two light sources in the resonant cavity, and obtaining the soliton optical frequency comb through gradual evolution. When the frequency interval of the pumping light source is N-time FSR, the spectral line interval of the soliton optical frequency comb is N-time FSR correspondingly. The distance-adjustable soliton optical frequency comb system can generate the soliton optical frequency comb with adjustable spectral line spacing and realizes no consideration for pumping light wavelength adjusting rate.

A device for controlling a satellite tracking antenna. An azimuth drive is configured to impart an azimuthal rotational motion to the antenna about an azimuth axis. An elevation axis drive is configured to impart a rotational motion to the antenna about an elevation axis orthogonal to the azimuth axis. A tilt axis drive is configured to impart a rotational motion to the antenna about a tilt axis. The tilt axis is connected to the elevation axis in such a way that the rotational freedom of motion of the antenna about the tilt axis is dependent on the elevation angle such that: at an elevation angle of 0° the rotational freedom of motion of the antenna about the tilt axis corresponds to the azimuthal rotational motion; at an increasing elevation angle the rotational freedom of motion about the antenna successively transcends into a roll rotation; and at an elevation angle of 90° the rotational freedom of motion of the antenna about the tilt axis corresponds to a roll rotation about a roll axis orthogonal to the azimuth axis and to the elevation axis. A control controls the operation of the azimuth axis drive, the elevation axis drive, and the tilt axis drive. The control includes a true north seeking gyro for tracking position, orientation, direction and speed of movement of the device. The control further includes an additional gyro comprising an elevation gyro axis arranged to sense the elevation movement and a tilt gyro axis arranged to sense the tilt movement, so as to minimize the angular velocity of the antenna pointing vector. A method for controlling a satellite tracking antenna, and a vessel including the device.

A technology for dyeing the polypropylene fibre or its fabric features that the surface of said polypropylene fibre or its fabric is modified by plasma as low temp while the monomer or solution of acrylic acid is introduced for surface graft, and then is dyed by 'ordinary-temp boiling dyeing' method.

The invention relates to ultrafine fiber with high color fastness and a manufacturing method thereof. The method comprises the steps of adding 3-40% coloring agent into a polymer powder to make into colored stock particles; adding the colored stock particles into spinning polymer polyester and / or polyamide in a ratio of 0.2-15%, and mixing; melt extruding the spinning polymer with a conjugate spinning machine, and coiling to obtain colored POY composite fiber; stretching and false-twist texturing to obtain colored fiber with high color fastness; and splitting with a basic hydrolysis method to obtain colored ultrafine fiber with high color fastness. The colored ultrafine fiber with high color fastness has excellent handfeel and color fastness to washing and light, and contains mass-colored dyeing components, so as to dispense with dyeing after being made into a textile. The colored ultrafine fiber has the advantages of simple process, low cost, low pollution, small product color difference, good color fastness, low fading liability, wide color spectra, and vivid and bright color.

The invention relates to a mixed spread spectrum communication system and a working method thereof, and belongs to the technical field of communication. The system comprises a sending terminal and a receiving terminal, wherein the sending terminal comprises a baseband modulator, a first mixer, a first direct digital frequency synthesizer, a first frequency synthesizer, a transmission radio frequency processing module and a first antenna; and the receiving terminal comprises a second antenna, a receiving radio frequency processing module, a second mixer, a third mixer, a second frequency synthesizer, a second direct digital frequency synthesizer, an intermediate frequency processing module, a modulus converting module and a baseband processing module. The method comprises the following steps that: the sending terminal carries out direct sequence spread spectrum and hopping frequency carrier wave modulation on transmitted data to generate a hopping frequency radio frequency signal, and sends the hopping frequency radio frequency signal; and the receiving terminal receives the hopping frequency radio frequency signal, and carries out down-frequency conversion demodulation and baseband processing on the hopping frequency radio frequency signal to obtain output data. The system and the method can improve the confidentiality and the anti-jamming performance of a mobile communication system.

The invention discloses a measurement system and method for detecting the orientation and the size of an underwater target on the basis of a laser sound source. According to the measurement system and method, the sound source is generated through lasers, laser energy is converted into sound wave energy, an acousto-optical coupling interference type optical fiber hydrophone array serves as a receiving sensor, the defects that in the optical measurement process, optical waves which are used are large in attenuation and the measuring distance is short are overcome, the defects of a sonar sensor in traditional acoustics detection are overcome, and the advantages that mobility and flexibility are high are achieved. Meanwhile, a sound source signal is generated through a laser-induced sound system, and generated sound signals have the advantages of being high in sound pressure level, wide in frequency spectrum, capable of conducting non-contact type control, and the like. An acousto-optical coupling interference type optical fiber hydrophone is used as the acoustic signal sensor, and the acoustic signal sensor has the advantages of being capable of detecting underwater acoustic signals in the non-contact mode, high in mobility, small in size, flexible in structural design, and the like.

A roasting oven includes an enclosure coupled to a source of microwave RF energy, an operable door for sealing the enclosure for RF, the operable door having a viewing aperture which prevents the escape of RF from inside the chamber. A rotating support has an axis which is perpendicular to the viewing aperture such that the progress of roasting may be viewed through the viewing aperture and into a food container placed in the rotating support. The applied power of the microwave RF source and the rotational velocity of the rotating support are selected to provide uniform or wide spectrum roasting of the food item. A roasting profile may include a roasting interval during which the microwave RF source and rotating support are both energized, and subsequently a cool-down interval where the microwave RF source is disabled and the rotating support continues to rotate.

The invention provides a spectral decomposition based post-stack seismic data resolution ratio increasing method. The method includes the steps: a, acquiring a post-stack seismic record; b, separating and extracting a secondary spectrum of a seismic wavelet from a secondary spectrum in the post-stack seismic record, and forming a zero-phase wavelet of the seismic record; c, building a seismic record reflection coefficient spectral decomposition object function based on a multilayered model by the aid of a spectral decomposition technology according to a reflection coefficient parity decomposition theory; d, globally optimizing the seismic record reflection coefficient spectral decomposition object function by the aid of a quick simulated annealing nonlinear optimization algorithm to inverse a seismic record reflection coefficient; e, convoluting the zero-phase wavelet of the seismic record and the seismic record reflection coefficient with the even component proportion being increased so as to form a seismic record with increased resolution ratio. According to the method, seismic data resolution ratio can be increased while thin interbed distinguishing capacity of seismic data can be improved.

The invention belongs to the field of LED light emitting devices and aims at providing a full-spectrum high-color-rendering LED white light emitting device to solve the problems of spectrum incompletion of white light produced by LED excited fluorescent powder, high components of blue light peak values, poor color reducibility and the like. The full-spectrum high-color-rendering LED white light emitting device comprises a device support and device pins, wherein at least one group of light emitting units electrically connected with the device pins is arranged on the device support, each light emitting unit comprises two or more blue light LED chips of different wavelengths, LED chips are fixed to the device support through insulation paste or are fixed to the device pins through elargol, and a cavity where the LED chips are fixed is filled with a mixture of fluorescent powder and silica gel. The full-spectrum high-color-rendering LED white light emitting device is fuller in spectrum, more continuous, wider in frequency spectrum, softer in light color and higher in light effect, reduced object surface colors are more lifelike, blue light is less, and the blue light peak values are lower.

The invention discloses a remote meter reading system based on a power distribution system. The control data processing module is used to upload the data information collected by the data acquisition unit to the on-site communication module of the monitoring center; the monitoring center includes: an account management module that manages according to cloud user accounts, analyzes the collected data information and provides decision-making The intelligent algorithm module is a transmission security module that provides network transmission and encryption and decryption functions. The system obtains electricity consumption information in a timely manner, with fast transmission speed, high accuracy and good real-time performance; the meter reading process is fully automatic, with high sensitivity and anti-interference ability, and the production cost is low, which is economical and reliable.

The present invention discloses a variable switching frequency PWM torque ripple control method for an alternating-current motor. A system mainly comprises a torque ripple prediction module and a switching cycle updating module. According to the method of the invention, with a PWM torque ripple peak value adopted as a control object, a PWM torque ripple prediction algorithm is established based on a two-level current ripple real-time prediction model; and with the PWM torque ripple peak value adopted as the control object, the algorithm can be adopted to change the switching frequency of a two-level voltage source inverter. Compared with constant switching frequency PWM control (CSFPWM), the variable switching frequency PWM control (VSFPWM) can effectively reduce the average switching frequency of the inverter, thereby, reducing switching loss, and at the same time, the variable switching frequency PWM control (VSFPWM) can effectively improve the EMI noises of a motor driving system.

The invention discloses an annular chamber broadband random fiber laser. The annular chamber broadband random fiber laser includes: a pump light source (1), a wavelength division multiplexer WDM (3), a standard single-mode fiber (7) and a beam splitter (5), wherein a first port (2) of the wavelength division multiplexer WDM (3) is connected with the pump light source (1), a second port (4) and a public port (8) of the wavelength division multiplexer WDM (3) are connected with two ends of the standard single-mode fiber (7) respectively to form a closed loop which is an annular resonant chamber, and the beam splitter (5) is connected between the second port (4) of the wavelength division multiplexer WDM (3) and the standard single-mode fiber (7) as a random laser output port (6). The annular chamber broadband random fiber laser has advantages of low pumping threshold, adjustable coherence, wide frequency spectrum and stable output. The annular chamber broadband random fiber laser can be used as a novel broadband light source with simple structure, so as to be widely used in the fields of light sensing and light communication.

The invention relates to a polyester blended fiber, and in particular relates to the polyester blended fiber and a preparation method thereof. The polyester blended fiber is prepared by modified polyester and polyamide through blending and melt spinning, wherein the modified polyester accounts for 60-95% of total quantity of the blended fiber in weight percentage, and the polyamide accounts for 5-40% of total quantity of the blended fiber in weight percentage. The glass-transition temperature of the modified polyester blended fiber is 50-75 DEG C, the dye-uptake rate of acid dyes under normal pressure is 85-99%, the dyeing uniformity is in 4-5 level, the moisture regain is 1.2-2.8% and the volume resistivity is 1.0*10<9>-5.0*10<12> Omega.cm. The polyester blended fiber can be dyed to have dark color by acid dyes at normal temperature and under normal pressure, the fiber and the fabric have soft handfeel and good moisture absorption property, and the problems of poor dyeing uniformity of the modified polyester complex fiber prepared by a combined melt spinning method and color difference of the fabrics are solved.

Provided is an OLED device and method of making the OLED device. According to an embodiment, the OLED device incorporates a microcavity structure including a dielectric mirror formed on a glass substrate, an anode formed above the dielectric mirror, an organic film layer formed above the anode, and a reflective electrode formed above the organic film layer such that the cavity is formed in the organic film layer by the dielectric mirror and the reflective electrode. The OLED device with microcavity structure can incorporate one or more phosphors deposited on an underside of the glass substrate such that light of additional wavelengths can be generated by the OLED device.

The invention discloses an LED light source capable of promoting fruit fullness. The LED light source is obtained by jointly packing a near ultraviolet chip and fluorescent powder coated on the surface of the near ultraviolet chip, the fluorescent powder includes red fluorescent powder, blue fluorescent powder, near ultraviolet fluorescent powder and green fluorescent powder according to a mass ratio of (1-4):(0.5-1):(0.1-0.5), and mass of the green fluorescent powder is 0.25-0.5 time that of the red fluorescent powder. The LED light source which is a plant growth light source is high in excitation efficiency and light efficiency, wide in light spectrum and conducive to plant absorption, and absorbing effectiveness to the light spectrum can be adjusted according to light elements needed by plants in the fruiting period to meet special needs of the plants on light in the fruiting period.

The present invention relates to chemical fiber and its the production of short colored polyester staple. The present invention features that color agglomerate is added into polyester material before direct spinning to color yarn. Without passing through dyeing, the said production process is simple, low in cost, less pollution, less color difference, and color fast, and the product has wide color spectrum and bright color.

The invention discloses a quasi-resonant mode switching power supply controller and a control method thereof. The controller comprises a zero-crossing detection circuit which samples zero-crossing points and generates zero-crossing signals; a valley bottom conduction logic circuit which receives the zero-crossing signal and the maximum frequency signal, generates the valley bottom opening signal,and decides whether to select a new valley bottom for latching according to the preset judgment logic; a PWM logic control circuit which receives a valley bottom opening signal and a minimum frequencysignal, thereby controlling the PWM signal to be turned on, and controlling the PWM signal to be turned off according to the FB voltage signal and the CS voltage signal; and a time setting circuit which receives the PWM signal and the FB voltage signal, generates a maximum frequency signal and a minimum frequency signal, and thereby controlling the maximum frequency and the minimum frequency of the PWM operation. The invention not only can eliminate the audio noise caused by the continuous switching of adjacent valleys when the quasi-resonant mode operates, but also can improve the EMI, and has high use and popularization value.

The invention discloses an anti-interference remote monitoring system based on power system maintenance. The anti-interference remote monitoring system comprises a monitoring center and multiple cap bodies which are connected with the monitoring center in a communication way. The monitoring center is connected with each cap body in a communication way so as to acquire data information transmitted by each cap body. In the transmission process of the acquisition data of the monitoring center, frequency modulation is performed on the acquisition data, the frequency spectrum under information transmission is modulated into broadband signals to be transmitted to channels for transmission, and then the broadband signals are demodulated at a receiving end by utilizing corresponding means so as to acquire the communication mode of the transmission information. The signal frequency spectrum is greatly extended by frequency modulation so that the signal anti-interference performance is enabled to be high and the error rate is low. Bandwidth occupied by the acquisition signals in transmission in the channels is relatively wide, and the receiving end adopts the correlated detection method for modulation and then the useful broadband information signals are recovered and demodulated into the acquisition signals so that the signal-to-noise ratio is high and the effects of high anti-interference performance and low error rate can be achieved.

A vehicle steering device comprises a steering column (22) and a steering wheel with a steering wheel rim (24). Arranged inside the steering column (22) is a vibration device (26; 26′). The vibration device is designed such that it can generate a haptic signal which can be felt by a driver on a surface (28) of the steering wheel rim (24).

The invention provides a super-resolution structure detection array confocal fluorescence imaging device and an imaging method thereof, relating to imaging devices and imaging methods thereof and aiming to solve the problems that the resolution of the existing confocal limiting technology is difficult to increase and confocal images are not clear. The device comprises a laser source, wherein a collimator and beam expander, a beam splitter prism, a 1 / 4 wave plate, a scanning system, an illumination objective, a fluorescent sample, a collecting lens and a CCD (charge coupled device) detector are arranged along the ray propagation direction of the laser source in sequence. The device has the effects that integration is carried out on a detection plane to change the light sensitivity of a corresponding detecting location; the OTF (optical transfer function) bandwidth of a system is expanded; the spatial cut-off frequency of a confocal fluorescence imaging system is improved and the spatial frequency domain bandwidth is expanded, thus obviously improving the lateral resolution of the imaging system; and the device is applicable to the measurement field of industrial topographic imaging.

The invention relates to a variable-depth cable ghost wave suppression method based on wave equation boundary value inversion. The method includes the following steps: 1) extracting a common-shot-point gather from seismic data collected by a variable-depth cable; 2) performing one-dimensional Fourier transform on the seismic data of a certain shot of the common-shot-point gather to obtain a frequency spectrum containing ghost wave seismic data; 3) calculating frequency domain seismic data U<AB> containing ghost waves corresponding to a certain frequency omega in the frequency spectrum; 4) calculating G1 and G2 according to detection point depth H<0><(2)>; 5) calculating frequency domain seismic data F<CD> after ghost wave suppression which are corresponding to the frequency omega according to U<AB>, G1 and G2; 6) performing steps 3) to 5) on all frequencies omega on the frequency spectrum in the common-shot-point gather to obtain frequency domain seismic data after ghost wave suppression; 7) performing steps 2) to 6) on other shots in the common-shot-point gather to obtain frequency domain seismic data after ghost wave suppression; and 8) performing inverse Fourier transform on frequency domain seismic data F<CD> after ghost wave suppression to obtain a common-shot-point gather after ghost wave suppression. The variable-depth cable ghost wave suppression method based on wave equation boundary value inversion can be used in the processing process of seismic data collected by a maritime variable-depth cable.

The invention discloses an electric monitoring bracelet which is characterized by comprising a bracelet body, wherein a wristlet A is connected to one end of the bracelet body; a wristlet B is connected to the other end of the bracelet body; the wristlet A is connected with the wristlet B through a button; a microprocessor, an approach electric alarm, a GPS (Global Positioning System) positioning module and a battery for supplying power to the bracelet body are arranged inside the bracelet body; an LED lamp and a light inductive plate are arranged on the upper surface of the bracelet body; a power supply switch and a camera are arranged on a side surface of the bracelet body. The electric monitoring bracelet has the advantages that the electric monitoring bracelet can be worn on a wrist of an overhaul operator, the structure is simple and compact, the labor cost can be lowered, electric operation procedures can be specified, and the working efficiency and the personal security of overhaul operators can be greatly improved.

The present invention discloses a variable switching frequency PWM (Pulse Width Modulation) control method suitable for a single-phase MMC (modular multilevel converter). The method comprises the steps of: regulating the carrier frequency of a single-phase MMC, and regulating the switching period duration of the PWM pulses generated based on comparison of the carrier signals to control the switching frequency of the single-phase MMC driven by the PWM pulses and allow the switching frequency of the single-phase MMC to be changed with the change of the load current, wherein the switching frequency is continuously changed near the fixed switching frequency, a mean switching frequency is unchanged, the mean switching frequency is the same as the fixed switching frequency, when the load currentis zero, the switching frequency is the maximum, and when the load current is the maximum, the switching frequency is the minimum. For large-power application occasions for the MMC, the optimizationof the switching loss is taken as a target to control the switching frequency of the inverter system, on the premise of maintaining the mean switching frequency unchanged, the switching loss of the system is reduced; and moreover, relative to the PWM algorithm of the fixed switching frequency, the current harmonic spectral distribution is wider so as to effectively reduce the system conduction EMI(Electromagnetic Interference).

A technology for producing cationic sliver includes vacuum drying CDP chips with 0.23-0.3% of SIPM content which controlling the precrystallizing temp and time, screw smelting and spinning, cooling while winding to obtain primary fibres (7-17 dtex), bundling, oil-bath drafting, two-pass steam stretching, curling while finishing oil, thermal shape fixation, making ribbons (88 mm in average length), carding, and making sliver. Its advantages are soft handle, high antistatic nature, and high dyeability.

The invention relates to a pulse ultra-wideband ranging system, comprising a control circuit, a first signal generation circuit, a second signal generation circuit, an oscillator, a power amplifier, an antenna, a low noise amplifier, a detection circuit, a comparing circuit and a pulse stretching circuit. A controller controls the first signal generation circuit and the oscillator to generate an ultra wideband pulse signal which is amplified and transmitted through the antenna; after the ultra wideband pulse signal encounters a target, a refection signal is amplified through the low noise amplifier and an echo envelope signal is detected by the detection circuit, and the echo envelope signal generates an echo effective pulse after passing through the comparing circuit; the controller delays for a certain time and controls the second signal generation circuit and the echo effective pulse to generate a target effective pulse; and the target effective pulse is stretched to be a stretching signal by the pulse stretching circuit and the stretching signal is sent to the control circuit, and the control circuit judges whether the target is on the specified distance or not based on the condition whether the stretching signal exists or not. The invention simply solves the problems of generation, transmission and detection of the ultra wideband signal, and facilitates the mini-sized design.

A roasting oven includes an enclosure coupled to a source of microwave RF energy, an operable door for sealing the enclosure for RF, the operable door having a viewing aperture which prevents the escape of RF from inside the chamber. A rotating support has an axis which is perpendicular to the viewing aperture such that the progress of roasting may be viewed through the viewing aperture and into a food container placed in the rotating support. The applied power of the microwave RF source and the rotational velocity of the rotating support are selected to provide uniform or wide spectrum roasting of the food item. A roasting profile may include a roasting interval during which the microwave RF source and rotating support are both energized, and subsequently a cool-down interval where the microwave RF source is disabled and the rotating support continues to rotate.

The invention relates to a torsional damper used for a rotary bearer having a rotary center; the torsional damper at least comprises the following parts: a centrifugal force swing; a damper and / or a bias device matched for affecting a fixed frequency of the centrifugal force swing, wherein the damper and / or bias device is applied to at least one swing mass of the swing masses; the torsional damper can use simple measurement to compensate different frequency of the locomotive, and especially aims to the low starting frequency and high frequency in driving.