592results about How to "Expand the detection range" patented technology

The invention discloses a roadway drivage drilling induced polarization advance water probing forecasting method, device and probe. The probe is placed in a drill hole; a power supply negative electrode B is mounted in a roadway outside the drill hole and is connected with an on-site main machine by a power supply cable; a power supply positive electrode A, a measuring electrode M and a measuring electrode N of the probe are mounted inside the drill hole, and are connected with the on-site main machine by the power supply cable and a signal cable; the power supply positive electrode A and the power supply negative electrode B outside the drill hole form the power supply cable; the on-site main machine measures an electric field change signal by the measuring electrode M and the measuring electrode N of the probe; and the electric field change signal is input to the main machine to calculate and detect the apparent resistivity and apparent chargeability of a target; the probe is propelled to repeat the steps at each measuring point to measure the apparent resistivity and apparent chargeability of each point and generate a resistivity profile map and a chargeability profile map; and the rate of change of the apparent resistivity and apparent chargeability is calculated to determine an inner geological structure taking a drilling axis as a central cylindrical space.

The invention discloses a barrier and travelable area detection method based on a vehicle-mounted binocular camera. The barrier and travelable area detection method comprises the following steps of S1, taking an image through a binocular camera; S2, preprocessing the image; S3, calculating the final matching cost of each pixel point in the image; S4, calculating through the final matching cost to obtain a v-disparity map; S5, determining the horizon line and the road scope by means of the v-disparity map; S6, calculating to obtain a barrier-road intersecting line in the road scope; S7, determining the scope of the current lane and the outermost lane; S8, calculating to obtain the height of the barrier on the part above the barrier-road intersecting line; S9, determining the image areas which belong to the same barrier; and S10, outputting the road area information and barrier information. Under the premise that disparity precision is not reduced, unnecessary binocular disparity map calculation is avoided, and therefore the real-time performance of the algorithm is greatly improved, and the barrier and travelable area detection method based on the vehicle-mounted binocular camera is suitable for fields of driving warning, automatic driving and the like.

The invention provides a preparation method of a flexible strain sensor based on conductive fiber and application thereof. The conductive fiber comprises a metal nanowire as a conductive layer, an electrospun polymer nanofiber membrane as a protective layer and an elastic yarn as an elastic carrier. In the preparation process, the surface of the elastic yarn is coated with a layer of polymer nanofiber membrane by an electrospinning technology first and then the metal nanowire is deposited on the surface structure thereof through multiple dip coating. The prepared flexible strain sensor based on the conductive fiber has the ability of quickly detecting various deformations such as stretching, bending and twisting, and the sensitivity thereof is still maintained to be 90% or above after thenumber of stretching cycles reaches 10,000; the flexible strain sensor can achieve simultaneous detection of human pulse beat, vocal cord vibration and more complex multiple sites, and has a great application potential in smart wearable devices such as virtual reality, human-machine interfaces and health monitoring.

The invention discloses an underwater non-contact mobile docking device for an underwater unmanned vehicle and a water surface mobile platform. The underwater non-contact mobile docking device comprises a water surface mobile platform side part and an underwater unmanned vehicle side part, wherein the water surface mobile platform side part mainly comprises a water surface mobile platform ship body, a non-contact docking main control unit, a flared guide hole, a non-contact electric energy transmission primary coil, a water surface mobile platform side signal transmission antenna, an electromagnet locking unit, a water surface mobile platform side acoustic communication positioning module and a cylindrical guide port; the underwater unmanned vehicle side part mainly comprises a visual guide assembly, an underwater unmanned vehicle side acoustic communication module, an underwater unmanned vehicle side signal transmission antenna, an underwater vehicle main body, a non-contact electric energy transmission secondary coil, an electromagnet locking block and a conical protection sleeve. By adopting the underwater non-contact mobile docking device, the detection range and relevant detection task execution flexibility of the underwater unmanned vehicle are enlarged and improved, and the recovery cost of the underwater unmanned vehicle is lowered.

The invention discloses a gallium nitride sensor, a preparation method and a multi-sensor system. The sensor comprises a heterostructure semiconductor substrate and a transistor which is located on the heterostructure semiconductor substrate, based on III-group nitrides and of an HEMT structure. Metal of the source electrode and metal of the drain electrode are both arranged on the portion, on the top layer of the transistor, of the semiconductor. A functionalized membrane obtained through functionalized processing is arranged on the surface of the grid electrode, and an induction area is formed in the exposed grid electrode area between the source electrode and the drain electrode. By detecting the current changes of the induction area, the concentration of to-be-detected substances making contact with the induction area is detected. By means of the scheme, the defects that in the prior art, sensitivity is low, the detection range is small and portability is poor can be overcome, and the advantages of being high in sensitivity, large in detection range and good in portability are achieved.

The invention relates to a novel frequency domain ground-to-air electromagnetic prospecting method which adopts a work mode of land launching and air receiving of electromagnetic waves to extract signal frequency spectrums and gives the underground electrical structure an inverse interpretation through a whole-region apparent resistivity method. A launching system which works on the ground launches multi-frequency pseudo-random waves towards the underground through multiple cascades and the signal with multiple frequencies can be obtained with one triggering, thereby greatly improving the detection efficiency. A receiving system is loaded on an aircraft, so when measuring the magnetic fields in the testing zone, it can adapt to the environment of complex surface structures, reduce the static effect caused by the near field effect and expands the detection range of electromagnetic prospecting. The receiving system can correct and compensate tested magnetic-field components when measuring multiple magnetic-field components, so the resolution capability of magnetic field measurement is improved. The frequency domain ground-to-air electromagnetic prospecting method is applicable to depth detection of severe surface zones and has the advantages of being wide in detection range, large in detection depth, high in detection efficiency, etc.

The invention discloses a directional induced polarization real-time advance water detecting device while drilling for tunnel construction. The device comprises a drill bit, a high-strength insulated sleeve while drilling, and a directional induced polarization detection system, wherein the drill bit is connected with the high-strength insulated sleeve while drilling through a connecting bearing, and the directional induced polarization detection system is distributed at the periphery of the high-strength insulated sleeve while drilling. The invention also provides a corresponding directional induced polarization real-time advance water detecting method while drilling for tunnel construction. According to the device and the method disclosed by the invention, the interference of the construction environment is avoided, the detection effect is better, the utilization efficiency of an advance borehole is improved, current orientation is realized, the low resistance at the borehole wall is broken through, the detection range is enlarged, an electrode is protected, and a better coupling contact between the electrode and a rock-soil body is guaranteed.

The invention discloses a navigation robot obstacle detection method and system. The system mainly comprises an ultrasonic detection module, an ultrasonic scanning module, an infrared detection compensation module and a robot core control module, wherein the ultrasonic detection module is mainly realized by amplifying a 40 kHz high-voltage driving signal and an ultrasonic receiving signal. The module is erected on a scanning steering engine to realize front non-dead-angle 180-degree scanning detection. By combining infrared range finding, the compensation of a navigation robot ultrasonic blind region is realized. A driving circuit is realized by establishing an H bridge with a field effect transistor. In a navigation robot, planar multi-point sensing is realized by using a pair of ultrasonic probes; the range finding range can reach 5.9 m at farthest; and a detection blind region is reduced to 2 cm. The system has the characteristics of low cost, small detection blind region, high anti-diffraction capacity, high real-time property and the like and has broad industrialization prospect. The method and the system can be used for the fields of micro robot navigation, environmental detection, intelligent vehicle active safety and the like.

The invention relates to a driving anti-collision radar device for an automobile. The driving anti-collision radar device comprises an antenna array, a Butler matrix multi-beam feedback distribution/synthesizer, a millimeter wave receiving and transmitting assembly, a waveform generator, an intermediate-frequency amplification circuit, a signal processing circuit, a display and alarm module and a power supply module. The waveform generator generates modulation voltage, outputs the modulation voltage to the millimeter wave receiving and transmitting assembly, generates a transmitting signal, and outputs the transmitting signal to the Butler matrix multi-beam feedback distribution/synthesizer for beam forming; and the transmitting signal is radiated by the antenna array, reflection echoes are transmitted to the Butler matrix multi-beam feedback distribution/synthesizer by the antenna array for signal synthesis, an intermediate-frequency beat signal is output by down conversion, the intermediate-frequency amplification circuit amplifies the intermediate-frequency beat signal, and the intermediate-frequency beat signal is input to the signal processing circuit for sampling, analyzing, processing, displaying and prewarning. The device is high in beam switching speed, low in cost, high in reliability, large in search area, and strong in anti-jamming performance, and can be widely applied to the fields of various complex industrial fields and driving safety of automobiles.

The invention provides a data fusion method and a data fusion system for a laser radar and a depth camera, wherein the method and the system relate to the technical field of data fusion. The method comprises the steps of acquiring a laser point by means of the laser radar, acquiring a first set of polar coordinate strings according to the laser point; acquiring a depth image by means of the depth camera, wherein the depth image comprises a first pixel; calculating a first angle between the first pixel and the laser radar according to the first pixel; reading depth information of the first pixel, and obtaining a first distance between each row of first pixels and the laser radar according to the depth information; combining the first distance and the first angle for forming a point set, thereby obtaining a second set of polar coordinate strings; and performing sequence fusion on the first set of polar coordinate strings and the second set of polar coordinate strings. The data fusion method and the data fusion system can enlarge detection range and improve information precision through data fusion.

The invention discloses an intravascular ultrasonic focusing method, focusing diagnostic device and focusing energy transducer. The intravascular ultrasonic focusing method comprises: sending an intravascular ultrasonic focusing diagnostic device to a far-end of a site of lesion; emittingultrasonic signals at 360 DEG to the inside of a blood vessel. The intravascular ultrasonic focusing diagnostic device includes an ultrasonic catheter, awithdrawing/drive apparatus and anelectronic imaging system. The front end of the ultrasonic catheter is provided with the intravascular ultrasonic focusing energy transducer. The rear end of the ultrasonic catheter is connected to the withdraw/drive apparatus which is connected to the electronic imaging system. The intravascular ultrasonic focusing energy transducer includes ultrasonic energy transducer units and a focusing unit. The ultrasonic energy transducer units serve to emitultrasonic signals and receive an ultrasonic signal that is reflected. The focusing unit serves to focus the ultrasonic signalemitted by the ultrasonic energy transducer unit. According to the invention, the resolution of the diagnostic device is increased and the signal to noise ratio of the imaging of the diagnostic deviceis increasedby using intravascular ultrasonic focusing technology, so that the diagnosis precision is increased.

The invention provides a zwitterionic polymer microsphere and a preparation method thereof. The zwitterion is introduced into the hydrophobic polymer microsphere through copolymerization to improve its hydrophilicity and reduce its non-specific binding. Introduce long-chain functional group molecules, and couple molecular probes through chemical bonds. On the one hand, the covalent combination makes the complex more stable. At the same time, the long-chain functional groups can reduce the steric hindrance during coupling and stabilize the activity of the bound biomolecules. The present invention also provides zwitterionic polymer magnetic microspheres and fluorescent microspheres and their preparation methods. In practical application, the present invention can well inhibit the non-specific adsorption of proteins. Balls are similar. It can effectively improve the stability of the reagent, reduce the background value of the reaction, and meet the requirements of the national standard or industry standard for the linear correlation, repeatability, recovery rate and other properties of the reagent. The invention has very wide application value of immunoassay.

The invention discloses a method for reducing perforation speed of nucleic acid molecules in a nanopore sequencing method. The method comprises the following steps of: adding the nucleic acid molecules to be measured into a nanopore sequencing device filled with electrolyte, wherein the nanopore sequencing device comprises an electrolytic cell provided with an anode and a cathode, and a solid nanopore film for separating the anode from the cathode of the electrolytic cell; placing the nucleic acid molecules to be measured in a cathode cavity of the electrolytic cell,; and when the nucleic acid molecules are measured, applying the voltage between the anode and the cathode, and introducing a reverse external field taking a pressure intensity external field as an electric field simultaneously. According to the method, the pressure intensity external field is reversely applied under the drive of an additional electric field, so that the speed of DNA (Deoxyribonucleic Acid) molecules is reduced when the DNA molecules pass through the solid nanopore, and the speed is reduced by about 50% to 80%, thus the time resolution of a DNA unimolecule detection technology is greatly improved. The method has very bright application prospect on a solid nanopore DNA molecule sequencing device.

The invention discloses a vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and a working method thereof. The system comprises a first system and a second system, wherein the first system works in an ultraviolet wave segment, the second system works in a visible infrared wave segment, and the first system and the second system both comprise laser emission units, optical receiving units, signal detection and data collecting units and control units. The laser emission units are used for emitting lasers to air, the optical receiving units are used for receiving back scattering echo signals of the air on the lasers emitted by the laser emission units, and conduct rotational Raman, vibration Raman and elastic scattering light splitting on the back scattering echo signals, the signal detection and data collecting units are used for obtaining parameter information of air temperature, water vapor, aerosol and cloud from the back scattering echo signals after light splitting, and the control units are used for controlling the laser emission units, the optical receiving units and the signal detection and data collecting units to run. The vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and the working method of the system can achieve all-weather air comprehensive continuous automatic observation.

The invention discloses an inter-satellite terahertz communication system architecture which comprises a transmitter and a receiver which are arranged on a satellite platform. When a terahertz frequency range is a low frequency band smaller than 10THz, the transmitter adopts a huge-amount terahertz antenna array; when the terahertz frequency range is a high frequency band of 10THz to 30THz, the transmitter is a terahertz laser; when the terahertz frequency range is the low frequency band or the high frequency band, the receiver is a huge-amount terahertz antenna array; the huge-amount terahertz antenna array comprises 104 to 107 magnitude orders of antenna array elements; the huge-amount terahertz antenna array is made by a semiconductor process, and a plurality of antenna array elements working at different wavelengths are achieved by utilizing the same process, thereby achieving a multi-frequency MIMO (Multiple Input Multiple Output) system; and after the receiver receives a terahertz wave, information is extracted by a detection quantum device, and the same detection quantum device is driven by adopting a plurality of antenna array elements. The system architecture disclosed by the invention fuses the advantages of infrared laser communication and millimeter wave communication.

The invention provides an ultrasonic phased array detection imaging system, comprising a phased array ultrasonic probe, a transceiver circuit, a signal processing module, a main control module and a human-computer interaction module. The phased array ultrasonic probe is connected to the signal processing module through the transceiver circuit, the signal processing module is connected to the maincontrol module, and the main control module is connected to the human-computer interaction module. The signal processing module converts detection control information of the main control module into an electric pulse control signal, controls a transmitting circuit of the transceiver circuit, and then controls the ultrasonic array probe to excite a corresponding sound beam to an object to be inspected. The ultrasonic beam is reflected by the internal defect of the object, after a detection echo signal is detected by a receiving circuit, the collected detection echo signal is processed to obtaindetection echo data, and the detection echo data is transmitted back to the main control module. The system can flexibly adjust the scanning coverage by detecting the configuration of detection parameters, the defect parts are detected, and the detection speed and accuracy are ensured.

The invention provides a weak signal detection amplification system based on an optoelectronic oscillator and a detection amplification method thereof, and belongs to the technical field of microwavephotonics. The weak signal detection amplification system based on the optoelectronic oscillator comprises a laser, a beam splitter, a phase modulator, a high-nonlinearity optical fiber, a circulator,a photoelectric detector, a power divider, a coupler, an electric amplifier, an intensity modulator, an adjustable optical attenuator and a radio frequency source. Wherein the laser is connected withthe beam splitter, the beam splitter is respectively connected with the phase modulator and the intensity modulator, and the phase modulator, the circulator, the photoelectric detector, the power splitter, the coupler and the electric amplifier are sequentially connected end to end to form a loop; Wherein the intensity modulator, the variable optical attenuator and the circulator are sequentiallyconnected, the radio frequency source is connected to the intensity modulator, and the phase modulator is connected with the circulator through a high-nonlinearity optical fiber. By adjusting the radio frequency source and the adjustable optical attenuator, rapid and high-precision weak signal detection and amplification can be realized.

The invention discloses an unmanned aerial vehicle resisting distributed networking detection method and device. The unmanned aerial vehicle resisting distributed networking detection method comprises the steps that at least two photoelectric infrared composite sensing detection assemblies are enabled to form an unmanned aerial vehicle resisting detection network; each photoelectric infrared composite sensing detection assembly determines the position thereof through a satellite positioning unit; a broadband active phased array radar unit in each composite detection assembly detects and discovers the position of an unmanned aerial vehicle to be detected; a visible light and infrared imaging unit in each composite detection assembly perform focused joint imaging on the unmanned aerial vehicle to be detected; and a plurality of positions of the unmanned aerial vehicles to be detected in the plurality of composite detection assemblies are fused to act as high-precision position output so as to complete stable and accurate tracking for the unmanned aerial vehicle to be detected accordingly, and a plurality of images of the unmanned aerial vehicle to be detected are fused to act as clear and complete image output so as to complete automatic and accurate recognition for the unmanned aerial vehicle to be detected accordingly. The unmanned aerial vehicle resisting distributed networking detection method has the advantages of convenient operation, wide detection area, high capturing rate, excellent positioning accuracy, high recognition rate and the like.

The invention belongs to an omnidirectional cylindrical dipole antenna for underground earth-probing radars, which comprises tubular monopole antenna cylinders, conical antenna heads, loading resistors, corresponding compression springs, inter-section fixing sleeves, supporting tubes, nut sleeves, connecting and fixing sleeves and coaxial cables, the loading resistors and the corresponding compression springs are respectively arranged in the holes of each two end surfaces between the antenna heads and the antenna sections and between the antenna sections, and monopole antennas are formed by the nut sleeves. Since the invention arranges the loading resistors between the antenna heads and the antenna sections and between the antenna sections to change the distribution of the current of the surface of the antenna, not only is the performance of the antenna improved, but also the production technique is simplified, the antenna can be matched with a borehole radar to operate under the conditions of center frequency equal to about 100M and bandwidth greater than or equal to 120M, the obtained waveform is neat, the main-to-side lobe ratio is distinct, tailing is tiny, and the waveform is stable; and consequently, the antenna is characterized in that: the comprehensive performance is high, the structure is simple, the diameter is small, the production cost is low, and the antenna can be matched with the borehole radar under the conditions of low frequency band and high bandwidth, and can effectively increase the performance, detection range and efficiency of the borehole radar.