34results about How to "Realize simultaneous detection" patented technology

The invention discloses a multiaxis differential spectrum absorbing method and device for vertically distribution detection of atmospheric components. Wherein, a plurality of telescopes are arranged to observe the space from the ground in different angles of pitch, so as to detect and collect sun lights scattered by the atmosphere; the surfaces of the telescopes' lens cones are blackened to reduce stray light, the scattered sun light is converged at the ends of optic fibers after passing the lens and light filters in the telescopes; the optic fibers at the tail ends of the telescopes are combined and guide the scattered sun lights into the incident slit of an imaging spectrometer, which first disperses the scattered sun lights, and then concentrate them on a photosensitive surface of a face array imaging CCD detector; the spectral signals go through data analysis and treatment after A/D conversion and inputting into a computer. The invention is applicable for chemical research of atmosphere, provides input data and model verification for chemical model of atmosphere; and is applicable for verifying the results of atmospheric components detected by a satellite.

The invention discloses a coding vibration and voice prompt blind guiding method and apparatus based on a multi-frequency modulation. The apparatus comprises a voice prompt module, a vibration prompt watch, a humidity sensor module, a temperature sensor module, a clock module, a control module, a wireless transmission module, an ultrasonic transmitting module, an ultrasonic receiving module, a global positioning system (GPS) module and a power supply module. The coding vibration and voice prompt blind guiding apparatus based on the multi-frequency modulation disclosed by the invention adopts multi-frequency ultrasonic simultaneous detection and phased array beam forming technologies as well as multi-mode prompt, and transmits a constant frequency wave, a first frequency-modulated wave and a second frequency-modulated wave to simultaneously detect far-distance, medium-distance and short-distance barriers; and the blind guiding apparatus further changes the detection direction through the phased array beam forming technology, so that the apparatus can automatically scan at various directions, and the apparatus can prompt user barriers from touch and hearing through the vibration prompt watch and the voice. And the blind guiding apparatus can effectively improve accuracy and realtime performance of detection, and is abundant in functions and convenient for operation.

The invention discloses an asymmetric spatial heterodyne spectrometer structure, which comprises an incident diaphragm, a collimator objective, a blazed grating, an interference module integrated by prisms, an imaging lens and an array type detector, wherein the interference module integrated by the prisms is a core part of the spectrometer structure, and is formed by a right trapezoid prism and an isosceles triple prism. Incident light is diffracted through the grating so as to enter the interference module, and is divided into two light beams through a beam splitting interface so as to be reflected by a plane mirror and a porro prism in the interference module respectively, so that non-equal optical path space interference of the two light beams is realized. The asymmetric spatial heterodyne spectrometer structure provided by the invention only needs one grating, has the advantages of simple light path, convenience in adjustment, high spectral resolution and the like since the interference module is integrated by the prisms, can be beneficial to effectively improving the integration level and the stability of a system, and has a wide application prospect in the multi-spectral line high-precision doppler velocity measurement field.

The invention discloses a space debris observation method based on alternating of different exposure times of a CCD camera. The space debris observation method comprises the steps: controlling the CCDcamera to continuously carry out the alternate collection of short exposure images and long exposure images according to the given exposure time; by processing odd frames of short-exposure images, realizing detection and astronomical positioning of low, medium and high orbit space debris; by processing the even-frame-length exposure images, detecting medium-high orbit space debris, and meanwhileachieving astronomical positioning of the medium-high orbit space debris detected by the current frame through negative film model coefficients of the front-back adjacent odd-frame images; and in a search observation mode, through a multipoint adjustment method and negative film model coefficients of adjacent odd frames, realizing precise astronomical positioning of low, medium and high orbit space debris. The space debris observation method realizes simultaneous detection and precise astronomical positioning of all-orbit space debris, improves the observation efficiency of observation equipment, and guarantees the measurement precision of the observation equipment for the all-orbit space debris.

A method for simultaneously detecting a frequency detector in a direct wind finding laser radar system in the high altitude and the low altitude includes the following steps of firstly, designing an improved Fabry-Perot etalon, wherein the improved Fabry-Perot etalon is composed of two parallel glass plates and provided with five channels which include two Mie scattered signal channels, two Rayleigh scattered signal channels and one laser frequency locking channel, namely, the channel L; secondly, selecting appropriate etalon parameters so that the requirements that the transmittance curve of the two Mie scattered signal channels is consistent with the transmittance curve of an optimized Mie scattered signal detection etalon, the transmittance curve of the two Rayleigh scattered signal channels is consistent with the transmittance curve of an optimized Rayleigh scattered signal detection etalon, the locking channel L has an effect on tracking both the relative laser frequency of the scattered signal channels R1 and the relative laser frequency of the scattered signal channels R2, and the detection height, especially the strength of Rayleigh backscattered signals, is ensured can be met.

The invention discloses a lithium tantalate narrow-band gas detector and a preparation method thereof, and belongs to the field of gas detection. The lithium tantalate narrow-band gas detector sequentially comprises a lower electrode, a lithium tantalate wafer, a gold back plate, a dielectric layer and an antenna array from bottom to top, wherein the antenna array comprises a plurality of antennasdistributed in an array manner and is used for absorbing light, the dielectric layer is used for making the absorbed light resonate so as to obtain electromagnetic energy, the gold back plate is usedfor converting the electromagnetic energy into Joule heat, the lithium tantalate wafer is used for absorbing the Joule heat to release positive and negative charges, the lower electrode is used for absorbing the negative charges, the gold back plate is used for absorbing the positive charges, and the detector obtains electrical signals according to the positive and negative charges so as to detect the concentration and the type of the gas according to the electrical signals. The lithium tantalate narrow-band gas detector of the present invention has advantages of wavelength selectivity, detection of a variety of gases, and low cost and easy packaging during the simultaneous detection of a variety of gases.

The invention discloses a marine temperature-salinity-depth sensing head based on a hollow micro-cavity and a manufacturing method thereof. The marine temperature-salinity-depth sensing head comprisesa tapered optical fiber (1), a hollow microsphere cavity (2), a hollow thin-wall micro-tube cavity (5), a hollow thick-wall micro-tube cavity (12) and a sensing head base body (14), wherein the tapered optical fiber (1) is provided with three tapered areas; the three conical areas are respectively and vertically contacted with one sides of the hollow microsphere cavity (2), the hollow thin-wall micro-tube cavity (5) and the hollow thick-wall micro-tube cavity (12); and the hollow microsphere cavity (2), the hollow thin-wall micro-tube cavity (5) and the hollow thick-wall micro-tube cavity (12) are fixed in the sensing head base body (14) to form a temperature sensing module, a salinity sensing module and a depth sensing module which are fixedly packaged in the sensing head base body (14).Compared with the prior art, based on the hollow micro-cavity echo wall resonant mode, by demodulating the movement of the central wavelength of the resonant peak in the three groups of transmissionspectrograms, the simultaneous detection of high-sensitivity ocean temperature, salinity and depth can be realized.

The invention belongs to the technical field of detector chips and particularly relates to a grid-controlled graphene-based ultraviolet-to-near infrared InGaAs detector chip. According to the invention, a InP contact layer, a InGaAs absorption layer, a silicon oxide (SiO2) medium layer, a graphene layer, a source electrode metal electrode, a drain electrode metal electrode and a grid electrode metal electrode are successively arranged on a InP substrate. The chip is advantageous in that on one hand, by using a grid-controlled interface field to separate photon-generated carriers, and sensing inversion type carriers in the graphene, spectrum detection is achieved; on the other hand, the graphene is free from energy gap and quite high in optical permeability; the InGaAs materials are capableof absorbing light of the 1.7[mu]m to ultraviolet wave band, so by use of the detector, detection from the ultraviolet to near infrared waveband can be achieved; and in addition, the graphene has quite high migration rate and carrier transmission characteristics, so the detector is enabled to have quite high quantum gain characteristics.