24 results about "Microwave sensor" patented technology

This invention relates to a microwave multi-mode flow measurement method for horizontal oil-water two-phase flow, employing a combination of a coplanar waveguide-excited helical microwave sensor and a dual-coaxial microstrip antenna sensing unit. The method includes: constructing a relationship between the mixing dielectric constant and water holdup of the horizontal oil-water two-phase flow based on the phase output signal of the coplanar waveguide-excited helical microwave sensor, thereby obtaining formulas for predicting water holdup and oil holdup using the dielectric constant of the oil-water mixture in a horizontal pipe; utilizing the upstream and downstream phase output signals of the dual-coaxial microstrip antenna sensing unit; constructing a correlation velocity model for the horizontal oil-water two-phase flow under different operating conditions based on experimental data, obtaining the functional relationship between the correlation velocity of the mixed fluid in the pipe and the mixing velocity and the phase-separated apparent velocity; and constructing a drift model for the horizontal oil-water two-phase flow under different flow patterns, obtaining functions relating the mixing velocity, the oil phase apparent velocity, and the oil holdup. This invention offers high measurement accuracy.

A self-excitation microwave sensor suitable for non-destructive testing of metal mesh film, belonging to microwave sensor technology, comprising a resonant sensing structure, a microwave amplifier, a phase shift element, a band-pass filter, a radio frequency detector, a digital-to-analog converter and a microprocessor; wherein the resonant sensing structure, the microwave amplifier, the phase shift element and the band-pass filter form a self-excitation oscillation loop, the resonant sensing structure has a band-pass characteristic, is located in the feedback branch of the loop, the resonant frequency thereof is consistent with the center frequency of the band-pass filter, and the loop gain and the phase shift satisfy the self-excitation oscillation condition at the frequency; by reasonably setting the gain of the microwave amplifier and collecting the self-excitation oscillation signal power in real time, the sensor can realize detection of sub-millimeter width crack damage and identification of high square resistance samples, has high detection sensitivity, compact structure, small volume and low cost, does not need other external microwave analysis instruments, and can be applied to on-site non-destructive testing of metal mesh film.

The utility model provides a microwave sensor, comprising a sensor housing, the sensor housing comprises a trapezoid housing, a first transverse plate and a second transverse plate, the first transverse plate and the second transverse plate are fixed at two ends of the trapezoid housing along the width direction of the trapezoid housing, two ends of the trapezoid housing along the length direction of the trapezoid housing are respectively provided with a pair of plug connectors, the first transverse plate is provided with a first through hole, and the second transverse plate is provided with a second through hole; two second through holes are formed in the second transverse plate; the top end of the circuit board is fixedly connected with the bottom ends of the first transverse plate and the second transverse plate, a battery block, a microwave emitter, a microwave receiver, a display screen, a first prompting lamp, a second prompting lamp and a control chip are arranged at the top end of the circuit board, and third through holes are formed in the positions, corresponding to the plug connectors, of the circuit board; the first prompting lamp and the second prompting lamp correspond to the two second through holes in position, and the display screen corresponds to the first through hole in position. The beneficial effects of the utility model are that the installation offset error can be eliminated, the man-machine interaction is increased, and the plug-in type rapid deployment is realized.

The application discloses a mounting structure of a microwave sensor on a flat lamp, which comprises a flat lamp body, a microwave sensor assembly and a mounting assembly which are matched with each other. An aluminum frame of the flat lamp body extends inward to form a mounting plate, and a long slot is formed in the mounting plate. The mounting assembly comprises a microwave sensor fixing seat and a fixing plate. The microwave sensor fixing seat is fixedly installed into the long slot of the mounting plate, the microwave sensor assembly is installed above the microwave sensor fixing seat, and the fixing plate is tightly installed above the microwave sensor assembly and is fixedly connected with the microwave sensor fixing seat. The mounting structure is simple in structure, convenient to install and compatible with microwave sensors of various specifications of flat lamps.

The present application relates to the technical field of agricultural drought information monitoring, and more particularly to an agricultural drought monitoring and prediction system based on unmanned aerial vehicle microwave remote sensing and deep learning, which comprises: a microwave remote sensing data fusion subsystem that carries multi-frequency microwave sensors on an unmanned aerial vehicle; dynamic adjustment of feature weights based on crop growth stages; elimination of geometric deviations between unmanned aerial vehicle flight strips through time series registration, and construction of a three-dimensional drought feature field by fusing multi-temporal data; a deep drought diagnosis subsystem that inputs the three-dimensional drought feature field into a space-time convolution network, extracts field patch-level anomalies in the spatial domain, and captures drought evolution patterns in the time domain; a drought response subsystem that divides drought levels based on the diagnosis results of the space-time convolution network; generation of differentiated irrigation schemes in combination with farmland Internet of Things data; and comparison of actual irrigation effects with prediction results. The present application realizes an upgrade of the agricultural drought prevention and control mode from passive monitoring to active prediction, and from extensive management to precise regulation.

This invention provides a method, system, and medium for three-dimensional positioning and displacement measurement that integrates microwave and vision technologies. The method includes: rigidly connecting at least one microwave sensor and at least one vision sensor as a joint sensing unit; establishing a spatial transformation relationship between the coordinate systems of the two sensors through calibration; fusing the target's radial distance and angle information provided by the microwave sensor with the target's two-dimensional imaging information provided by the vision sensor; and directly solving for the target's three-dimensional coordinates in the selected coordinate system using an optimization algorithm; further combining the high-precision one-dimensional displacement information from the microwave sensor with the two-dimensional displacement information from the vision sensor to reconstruct the target's complete displacement vector in three-dimensional space. This invention, through a compact heterogeneous sensor fusion architecture, effectively solves the problems of limited dimensionality of single-sensor modes, high cost of multi-sensor networking, system complexity, and poor engineering applicability, achieving high-precision, low-cost, and full-dimensional non-contact three-dimensional positioning and displacement measurement.

This invention belongs to the field of low-Earth orbit remote sensing satellite technology and provides a method and system for inter-satellite phase design based on sensor field-of-view matching. The method includes: observation and positioning to obtain the characterization of inter-satellite phase design input variables; calculating the upper and lower limits of the inter-satellite phase difference based on the characterization of the inter-satellite phase design input variables; determining the range of inter-satellite phase difference values; and outputting the phase difference. This invention solves the problem of field-of-view matching during satellite relay, improving the accuracy of relays. It further considers satellite sensor field-of-view matching when satellites have a cooperative relationship, making the problem more targeted to specific scenarios. It is applicable to applications such as Earth remote sensing observation and space debris observation, and is suitable for various sensors, including optical and microwave sensors. It can provide direct guidance for the design of various specific constellation schemes with inter-satellite relay cooperation.

This invention discloses a space-ground coordinated radiometric characteristic calibration method for spaceborne active microwave sensors in the field of radar Earth observation technology. It constructs a space-ground coordinated calibration system consisting of a radiation reference source satellite and a ground calibration processing station. The method includes: determining the orbital parameters of the radiation reference source satellite; the satellite transmitting signals to the ground station in Earth observation mode, using a known RCS target on the ground to calibrate its own antenna gain and link gain; receiving signals from the satellite to be calibrated in Earth observation mode, accurately calculating and transmitting echo signals based on the calibrated parameters; and the satellite to be calibrated calibrating its own transmit / receive link gain based on the received echo signals. This invention can be widely applied to the on-orbit radiometric calibration of active microwave sensors such as synthetic aperture radar, altimeters, and microwave scatterometers, significantly improving calibration frequency and accuracy, supporting multi-band, high-stability quantitative remote sensing tasks, and providing reliable technical support for precise observation in fields such as ocean monitoring, weather forecasting, and topographic mapping.

The utility model relates to the technical field of cereal baking and drying, and specifically discloses a hot -air baking device for cereal baking, which comprises a baking box, a feeding guide plate is arranged on the feeding port of the baking box, a push rod is installed between the feeding guide plate and the baking box, and the inclination of the feeding guide plate is adjusted through the push rod; a microwave sensor is installed on the top of the baking box, and the microwave sensor is used for detecting the moisture content of cereals; an atomizer and a hot air nozzle are further arranged on the baking box. The hot -air baking device provided by the utility model adjusts the grain feeding slope through the adjustable feeding guide plate, and the atomizer and the hot air are used for controlling and adjusting the grain humidity of the hot -air baking device for cereal baking.

The application discloses a kind of detection methods of fan blade damage, including dividing detection area on fan blade, using microwave sensor to detect detection area and obtain scattering parameter, using scattering parameter to monitor and analyze fan blade and obtain the damage condition of fan blade.The application also discloses a kind of detection device of fan blade damage.The application can more accurately obtain the damage condition of fan blade by using microwave sensor to analyze the data received by microwave sensor.

The utility model relates to a kind of detection devices, especially a kind of fireworks quality detection classification device.The technical implementation scheme of the utility model is:a kind of fireworks quality detection classification device, including frame, first transmission group, second transmission group, microwave sensor and controller etc., first transmission group is fixedly connected with the frame one side, first transmission group is set to inclined state, i. e., first transmission group left low right high, second transmission group is symmetrically fixedly connected with the frame middle part both sides, microwave sensor is fixedly connected with the frame inner top, controller is fixedly connected with the frame other side, first transmission group, second transmission group and microwave sensor are electrically connected with controller.The utility model cooperates with first transmission group and second transmission group, and fireworks is transported to third transmission group top, microwave sensor detects the density of fireworks internal gunpowder, and whether the quality of fireworks meets standard value range is judged according to the displayed microwave signal amplitude variation, to realize the effect of accurately detecting fireworks quality.

This invention discloses an algorithm-assisted microfluidic-microwave integrated biosensor and its high-precision detection method, relating to the fields of biosensors and medical detection technology. The biosensor includes a microfluidic sorting module, a dual-frequency microwave sensing module, and an intelligent algorithm unit. The microfluidic sorting module achieves label-free cell sorting and enrichment through a helical microchannel. The dual-frequency microwave sensing module acquires the dual-band dielectric response of cells through two independent resonant units. The intelligent algorithm unit incorporates a dual-mode feature fusion model based on a multi-head cross-attention mechanism, which can dynamically fuse multi-dimensional sensing features. This invention solves the problems of limited sensitivity and large nonlinear concentration prediction errors in traditional single-frequency microwave sensors, achieving label-free quantitative detection of cell concentration with low error, high linearity, and strong anti-interference capabilities.

This invention proposes a dual-frequency microwave sensor, an oil-water two-phase water cut measurement device and method, relating to the field of petroleum testing technology. The dual-frequency microwave sensor includes a sensor pipe, a shielding layer, and various detection probes. The sensor pipe is cylindrical, with flange interfaces at both ends for connection to oil well pipe flanges. The detection probes include a high-frequency excitation probe, a high-frequency measurement probe, a low-frequency excitation probe, and a low-frequency measurement probe. The high-frequency excitation probe and the high-frequency measurement probe penetrate radially along the sensor pipe in a double parallel line structure, symmetrical about the sensor pipe axis, and are located at the upper part of the sensor pipe. The low-frequency excitation probe and the low-frequency measurement probe also penetrate radially along the sensor pipe in a double parallel line structure, symmetrical about the sensor pipe axis, and are located at the lower part of the sensor pipe. This application helps improve the completeness and accuracy of water cut detection.

A microwave radiometer sensor that reduces observational noise and enables observations in the presence of interference is disclosed. Microwave radiometers provide very valuable environmental observations from space. Their observations, however, are threatened by anthropogenic signals, radio frequency interference (RFI), that are emitted by communication systems, automobile and various other radars, and other emitting sources. This invention describes a method of RFI detection that is simple, can be highly integrated into a compact, low weight, and minimal power consuming technology. The solution is economical, provides increased observational sensitivity, and makes environmental observations more sensitive and more reliable even in the presence of a certain level of interference.

The application discloses a dielectric constant microwave sensor with a microstrip coupling line structure and particularly relates to the technical field of microwave sensing, and comprises a metal transmission line on an upper layer, a dielectric substrate on a middle layer and a grounded metal plate on a bottom layer; a signal path of the upper layer structure of the microwave sensor is arranged between the first port and the second port, and the signal path is composed of at least one transmission line, four coupling lines and two metalized through holes. The microstrip coupling line structure adopted in the application is sensitive to changes in the dielectric constant of external materials, has the advantages of small size, easy processing, low cost, high precision and the like, different sizes of the microstrip coupling line provide two measurement working frequency bands, and the microwave sensor can be effectively applied to solid dielectric constant measurement work.

This invention provides a surface plasmon resonance sensor and its applications, relating to the field of microwave sensor technology. The surface plasmon resonance sensor of this invention includes a dielectric substrate, a metallic waveguide, and a subwavelength resonator, wherein the subwavelength resonator has a fan-shaped defect structure. By introducing an asymmetric loss structure through the design of the subwavelength resonator with the fan-shaped defect structure, the surface plasmon resonance sensor of this invention achieves a singularity state, exhibiting a square-root-dependent high sensitivity response to external perturbations. This significantly improves detection sensitivity and enables high sensitivity and low detection limits for substances such as deionized water, glycerol solution, and glucose solution, as well as dynamic detection of the hydrolysis process of thioacetylcholine. It has advantages such as simple structure, easy integration, and high sensitivity.

The application relates to the technical field of carbon dioxide sensors of porous materials, in particular to a microwave CO2 sensor based on C 60 @MAF-66, a manufacturing method and a detection method thereof, the manufacturing method comprises the following steps: S1, selecting two complementary split ring resonator loaded half-mode substrate integrated waveguides as a sensing circuit; S2, dispersing C 60 @MAF-66 in ethanol to form a slurry; S3, coating the slurry in the step S2 on a resonator electric field concentration area, and obtaining a microwave CO2 sensor after drying and solidification. The microwave CO2 sensor obtained by the application can effectively prevent competitive adsorption of sulfur dioxide and corresponding deviation of carbon dioxide.

The application discloses a kind of combined magnetic field and microwave parking space detection method, equipment and system, it is related to intelligent sensor technical field.The method comprises: real-time acquisition candidate parking space in each magnetic field sensor's magnetic field intensity signal and each microwave sensor's echo intensity signal;Based on the magnetic field intensity signal of each magnetic field sensor, respectively assess the magnetic field signal availability of each side in candidate parking space;Based on the magnetic field signal availability of each side in candidate parking space and the echo intensity signal of corresponding microwave sensor, respectively assess the first sensor availability of each side in candidate parking space;Based on the first sensor availability of each side in candidate parking space, first magnetic field sensor and first microwave sensor for detecting candidate parking space are screened out;Based on the first magnetic field intensity signal of first magnetic field sensor and the first echo intensity signal of first microwave sensor, determine the parking space detection result of candidate parking space.The application can improve the accuracy of parking space detection.

This invention relates to a microwave detection system for cancer cells, belonging to the field of biomedical sensing technology. The system includes a metal substrate; a microwave sensor located on the upper surface of the metal substrate and attached to it; a microfluidic chip located on the upper surface of the microwave sensor and attached to it; and a cancer cell concentration detection module connected to the microwave sensor, used to collect capacitive sensing data and microwave sensing data related to the microwave sensor when a cell solution flows on the microfluidic chip. This invention offers advantages such as high sensitivity, strong anti-interference capability, and real-time performance in cancer cell detection.