50results about How to "Realize long-distance detection" patented technology

The invention discloses a depth information processing method and system and electronic equipment. The depth information processing method comprises the steps that multiple pieces of partition depth information are acquired, the multiple pieces of partition depth information are acquired by detecting multiple view field partitions through a partition TOF according to a certain time sequence, and the multiple view field partitions jointly form a complete target view field; and according to the partition arrangement of the plurality of view field partitions, the plurality of partition depth information in a splicing manner are processed to obtain complete depth information corresponding to the target view field.

The invention discloses a far-distance human-body-hiding hazardous article detector based on the radar target polarization characteristic. The detector comprises a display control end, a signal processing and control module, a linear frequency modulation source module, a transceiving frequency doubling link module, a clock distributing module, a medium-frequency amplification filtering module and a signal acquisition module. The linear frequency modulation source module provides linear frequency modulation signals to the transceiving frequency doubling link module. The transceiving frequency doubling link module conducts frequency doubling and amplifying on the linear frequency modulation signals provided by the linear frequency modulation source module so that the frequency of the linear frequency modulation signals can reach the designated frequency band and the linear frequency modulation signals can irradiate a detected object, reflection echoes of the detected object are received, processed and then transmitted to the medium-frequency amplification filtering module and finally return to the display control end. The display control end counts the distribution of strength values of two perpendicular routes of echoes of the detected objects according to the received multi-acquisition data, so whether the detected object carries a hazardous article or not can be effectively detected, far-distance detection can be achieved, security check can be conducted on high-density people in open places, and the detected object does not need to cooperate actively.

The invention relates to a bi-conical tapered fiber evanescent wave coupling-based fiber Raman sensor detection device, which comprises a monochromatic source and a high-sensitivity Raman spectrometer, wherein the monochromatic source sequentially passes through a polaroid sheet, a focusing lens, a fiber coupling platform and a fused biconical taper fiber to be connected to the high-sensitivity Raman spectrometer, and the fused biconical taper fiber is placed in a solution to be detected; and in a taper zone of the fused biconical taper fiber, evanescent waves excite the molecules, absorbed bya metal nanoparticle layer on the surface of the fiber, of the solution to be detected to enable the molecules of the solution to be detected to generate a Raman spectrum which is coupled back to thefiber through the taper zone of the fiber and transmitted to the high-sensitivity Raman spectrometer to detect the Raman spectrum of the solution to be detected. The device is simple in structure, high in anti-interference capacity, high in flexibility and is suitable to be used on various occasions such as online analysis, real-time detection and biopsy specimen analysis.

The present invention relates to a surface-enhanced raman scattering torquemaster based on an optical fiber fuse-tapered coupler, comprising two monochromatic light sources, a 2*2 fuse-tapered optical fiber coupler and two high-sensitivity raman spectrometers. The two monochromatic light sources are connected to the two high-sensitivity raman spectrometers sequentially through two polaroid sheets, two focusing lens, two optical fiber coupling platforms and the 2*2 fuse-tapered optical fiber coupler; the 2*2 fuse-tapered optical fiber coupler is positioned in the solution or the gas to be tested; on the fused tapering zone part of the 2*2 fuse-tapered optical fiber coupler, evanescent wave excites the solution or gas molecule to be tested which is absorbed by a optical fiber surface metal nanometer particles layer, so as to generate raman spectrum, couple into the optical fiber through the optical fiber fused tapering zone, and transmit to the high-sensitivity raman spectrometers, to detect the raman spectrum of the solution or the gas molecule to be tested. The device has simple structure, strong anti-interference capacity and high sensitivity, and is applicable to various fields such as on-line analysis, real-time detection, biopsy sample analysis and the like.

The embodiment of the invention discloses an all-fiber laser radar for a multi-transmitting single-receiving telescope array, and the radar comprises a light source module, a light-splitting module, a transmitting and receiving telescope module, and a collection module. A laser beam is divided into two beams, wherein one beam serves a reference calibration beam, and the other beam serves as signal light interacting with the atmosphere. The signal light is transmitted to a telescope array for transmitting, and a telescope receives an atmosphere echo single after the signal light interacts with the atmosphere. Moreover, the radar carries out the collection of the atmosphere echo signal and the reference calibration beam. According to the technical scheme of the invention, the radar is stable in system, is compact in structure, employs all-fiber connection, employs the laser telescope array, improves the laser emission power and the detection SNR, achieves the far detection, improves the time resolution, spatial resolution of a laser radar, and improves the detection precision of the laser radar.

The invention relates to an optical fiber type laser liquid turbidity measuring device and measuring method. The measuring device comprises a laser, an optical fiber, an optical fiber circulator, an optical fiber collimator, a photoelectric detector and a signal demodulating and processing system. In a measuring system, a full-optical fiber structure of the optical fiber circulator and the optical fiber collimator is adopted, and on the basis of a back scattering light measuring principle, namely, a monotonous relation between the liquid turbidity and the increasing of the scattering light intensity, the accurate on-line measurement for the liquid turbidity under the conditions of long distance and narrow space and other complex conditions is realized. The optical fiber type laser liquid turbidity measuring device has a simple structure, is easy to realize and is high in stability and sensitivity; the practicability and safety of a liquid turbidity measuring system are effectively increased; and a technical support is supplied to the long-term on-line water quality monitoring.

The invention discloses a frequency code optical fiber time domain reflectometer and a working method thereof. The frequency code optical fiber time domain reflectometer comprises a light source, a first optical fiber coupler, an acoustic optical modulator, a radio frequency signal generator, an optical fiber amplifier, an optical gyroscope, a second optical fiber coupler, a balance detector and a data acquisition card. Optical pulses are subjected to frequency modulation so that the space resolution ratio is not limited by optical pulse lasting time and the space resolution ratio does not depend on the width of the pulse, but depends on a frequency modulation range of detection pulses, so that the aims of high space resolution ratio and long detection distance are realized simultaneously.

The invention relates to the technical field of intelligent control and intelligent detecting, in particular to a magnetic pointer type non-contact temperature, pressure, liquid level measuring transmitter for an opening-free nuclear vessel. The measuring transmitter comprises a nuclear vessel sealing shell, a vessel inner temperature parameter measuring and converting unit, a vessel inner pressure parameter measuring and converting unit, a vessel inner liquid level parameter measuring and converting unit and a magnetic pointer measuring transmitting unit, wherein the vessel inner temperature parameter measuring and converting unit and the vessel inner pressure parameter measuring and converting unit are located above the nuclear vessel sealing shell, the vessel inner liquid level parameter measuring and converting unit is located on one side of the nuclear vessel sealing shell, and the temperature, pressure, and liquid level parameters can be measured at the same time. The magnetic pointer type non-contact temperature, pressure, liquid level measuring transmitter has the advantages that the influence of the zero voltage shifting of linear Hall sensors on precise interpolation positioning is solved through environment temperature compensation, and the problems that precision is lowered and measuring cannot be performed due to the fact that an external magnetic pointer measuring transmitting unit is far away from the vessel inner measuring and converting units and the magnetic field signals of a magnetic pointer are weak are solved.

The invention relates to a radial plume multi-component gas measurement remote sensing system, which belongs to the field of laser remote sensing measurement, and includes a reflected laser acquisition unit and a data acquisition unit; the data acquisition unit includes a data acquisition card and a computer, and the reflected laser acquisition unit includes multiple Laser, the light of each laser is divided into two paths through the beam splitter, one path is irradiated to the first detector through the reference absorption pool, and the other path is irradiated to the beam expander through the beam combiner, and the cooperative target reflectors are arranged in sequence along the optical path Mirror, reflector, first lens, and converge to the grating, where the separation of different wavelengths is realized, and the light of different wavelengths is incident on the second detector connected to the data acquisition card through the narrow-band filter and the second lens, and the laser The number is more than two, and the laser is a modulated semiconductor laser, the scanning frequency is greater than 100Hz, and the modulation frequency is greater than 20kHz. The invention has simple and compact structure and high sensitivity, and can detect the concentrations of various gases in the air in real time.