13results about How to "Expand the detection range" patented technology

The utility model provides a wind tunnel probe test coordinate frame device, which belongs to the field of wind tunnel tests and comprises two fixing plates, an adjusting block is provided with a coordinate displacement assembly capable of flexibly changing the coordinate position of a wind tunnel probe, and the adjusting block is provided with an adjusting block. The coordinate displacement assembly is provided with a rotating assembly which is used for rotating the wind tunnel probe so that the wind tunnel probe can adapt to the measurement requirement of the non-direct wind direction. According to the utility model, through the coordinate displacement assembly and the rotating assembly, during use, the position of the probe adjusting block is adjusted through rotation of the second screw rod, so that the probe adjusting block slides and displaces in the second sliding adjusting block, thereby enlarging the detectable range of the wind tunnel probe; the probe can be flexibly positioned to any position of the wind tunnel by adjusting the probe, and the angle of the probe clamp can be adjusted through the hinge design, so that the angle of the wind tunnel probe is changed.

This invention provides an on-chip integrated spectral measurement method and apparatus based on quantum-induced coherence. The method includes: introducing pump light into one or more surface waveguide channels; the pump light undergoes spontaneous parametric down-conversion in a first nonlinear region within the corresponding surface waveguide channel, generating a first probe light and a first signal light entangled with it. Within the microfluidic control, the first probe light undergoes resonant absorption upon interaction with the sample under test. The resulting mixed light enters a second nonlinear region at the rear end of the surface waveguide channel to establish quantum coherence. After scanning the refractive index of each surface waveguide channel through a modulation element, a quantum interference signal characterizing the spectral information of the sample under test is formed on the signal light probe at the exit of each surface waveguide channel. This method not only achieves non-contact spectral measurement but also offers a wide detection range and high accuracy.

The utility model belongs to the technical field of lenses, and discloses a lens structure applied to a doorbell, which comprises a lens and a dismounting assembly, and one side of the lens is fixedly connected with an elastic chuck; the dismounting assembly comprises an annular seat and a knob, the knob is rotatably mounted on the annular seat, an insertion groove is formed in the annular seat in the radial direction of the annular seat, a movable rod is slidably inserted into the insertion groove, a pressing rod is fixedly connected to the lower end of the movable rod, and the lower end of the pressing rod slidably penetrates out of an inner ring of the annular seat; according to the lens dismounting device, the dismounting assembly comprises the annular seat and the knob, the elastic clamping head can be extruded to realize quick dismounting of the lens only by rotating the knob and utilizing the transmission of the gradual change bulge to the movable rod and the pressing rod, additional tools are not needed, the operation efficiency is remarkably improved, and the mounting risks such as screw slipping are avoided.

This invention belongs to the field of lightning detection technology, specifically relating to a lightning location method and system based on hybrid baselines. It aims to solve the problem that existing technologies cannot integrate short-baseline and long-baseline lightning detection data, thus failing to achieve hybrid baseline lightning location. The invention includes: real-time acquisition, labeling, and compression of lightning electromagnetic pulse waveform data by long- and short-baseline electromagnetic pulse detection devices; real-time transmission of the compressed lightning electromagnetic pulse waveform data to a data processing center station; decompression and filtering of the lightning electromagnetic pulse waveforms at the data processing center station; and calculation of the accurate arrival time of the signal at each detection device at the data processing center station; and calculation of the lightning event location using a time-difference positioning algorithm at the data processing center station. This invention can significantly improve the detection range, efficiency, and positioning accuracy of existing lightning electromagnetic pulse detection systems, and is suitable for low-cost, large-area lightning event detection, especially for accurate real-time detection of thunderstorm activity in offshore areas.

This utility model belongs to the field of transmission line external damage prevention monitoring technology, specifically disclosing a laser-based online monitoring device for transmission lines. The device includes a laser detection module, a main control module, and an alarm module. The laser detection module comprises a first mounting bracket, a second mounting bracket, a first motor, a second motor, a third motor, a first connecting rod, a second connecting rod, a third connecting rod, and a laser ranging sensor. The first and second motors are mounted on the first mounting bracket, and the third motor is mounted on the second mounting bracket. One end of each of the first, second, and third connecting rods is movably connected to the second mounting bracket. Through the cooperation of the first, second, and third motors, and the first, second, and third connecting rods, the laser ranging sensor body can rotate at multiple angles in three-dimensional space, expanding the detection range of the laser detection module within the transmission line protection area.

The invention discloses a nonmetal pipeline detection positioning device, method and system, and the positioning device integrates a sound generation device, a sound pickup, a main controller and the like through a detection box body, and an operator can carry one detection box body to carry out the detection work of a nonmetal pipeline. The sound generating device and the sound pick-up are used in cooperation, the position of the non-metal pipeline can be accurately determined by emitting the sound with the specific frequency and receiving the echo generated after the sound is transmitted in the non-metal pipeline, and the mode based on sound transmission is not limited by the non-conductive and non-magnetic characteristics of the non-metal pipeline; and the problem of non-metal pipeline detection can be effectively solved. The display device is installed on the detection box body and can display the position information of the nonmetal pipeline in real time. The main controller accurately analyzes and processes sound signals sent by the sound generating device and echo signals received by the sound pick-up, specific signals related to the non-metal pipeline are extracted, and the detection accuracy is improved.

The application discloses a kind of three-dimensional point cloud data processing method and system, obtain the three-dimensional point cloud data that vehicle-mounted laser radar is collected every time;According to the data obtained, construct the list of to-be-processed point cloud frame;According to the list of to-be-processed point cloud frame, construct initial starting point cloud frame list;According to initial and the list of to-be-processed point cloud frame, construct end point cloud frame list, update initial starting point cloud frame list;From end point cloud frame list and the starting point cloud frame list of updated starting point cloud frame, take out one-to-one corresponding end point cloud frame and starting point cloud frame;From the list of to-be-processed point cloud frame, take out all point cloud frames between the acquisition time of starting point cloud frame and end point cloud frame, all point cloud frames between starting point cloud frame and end point cloud frame, starting point cloud frame and end point cloud frame are merged, obtain original three-dimensional point cloud image segment;Each original three-dimensional point cloud image segment is carried out denoising processing, obtain the three-dimensional point cloud image segment after processing, construct data index table.

The utility model relates to the technical field of unmanned aerial vehicle detection, and discloses an unmanned aerial vehicle detection device, which comprises a shell and an imaging module, the shell is provided with a mounting surface, the mounting surface comprises a first wall surface, a second wall surface and a third wall surface, and two ends of the second wall surface are respectively connected with the first wall surface and the third wall surface. A first included angle is formed between the second wall surface and the first wall surface, a second included angle is formed between the second wall surface and the third wall surface, and any mounting surface is provided with at least one imaging module. The plurality of mounting surfaces are arranged at the front end of the shell, so that the unmanned aerial vehicle detection device can acquire more images. By limiting the shape of the shell, the imaging module is expanded and distributed, the detection range of the imaging module is expanded, the unmanned aerial vehicle detection device can monitor a wider and more comprehensive range, and the reliability and applicability of the unmanned aerial vehicle detection device are improved.

The invention discloses a phase frequency detector based on capture acceleration and noise suppression dual-mode adaptive switching, and the phase frequency detector employs a duty ratio shaping module to shape a reference signal and a feedback signal, reduces the duty ratio, expands the working range of a capture acceleration mode, and facilitates the reduction of the locking time of a loop. A mode controller is used for detecting the phase difference of a reference shaping signal and a feedback shaping signal, judging a locking state and controlling a reset path to be switched between a capture acceleration mode and a noise suppression mode, a high phase discrimination blind area introduced by the noise suppression mode is eliminated, and the phase discrimination range of the phase frequency detector is expanded. Reset paths adopted by the invention are a capture acceleration path and a noise suppression path, the capture acceleration path adopts an input delay sampling technology, inherent delay of a reset signal during generation and transmission is counteracted, a phase discrimination range is effectively expanded, and a phase discrimination blind area of the phase frequency detector is reduced; the noise suppression path optimizes the time sequence of reset signal generation and expands the loop charging and discharging time.

The utility model relates to the technical field of ultrasonic underwater positioning, and discloses an underwater target ultrasonic positioning and imaging comprehensive experiment device which comprises a processing table, a vertical plate fixedly connected to the back of the top of the processing table, a water tank arranged on the top of the processing table, a control instrument arranged on the right side of the top of the processing table, and a connecting cable arranged on the left side of the control instrument. A sliding rail is arranged on the right side of the top of the water tank. According to the underwater target ultrasonic positioning and imaging comprehensive experiment device, the adjusting assembly is arranged, a connecting plate is held to drive a rotating shaft rod to rotate in an inner ring of a bearing part and drive a magnet ring part to slide in an inner ring of a magnetic attraction ring part, the two parts are in magnetic attraction connection, magnetic attraction locking can be achieved when no external force is applied after adjustment, and angle adjustment is conducted; the device for enlarging the detection range can be provided with an angle adjusting and transverse moving assembly, and the ultrasonic transducer can be timely adjusted to the position close to the object, so that the device is convenient to use.

The invention discloses an unmanned aerial vehicle detection system and method based on a star chain signal, and relates to the technical field of communication and signal processing, and the system comprises a signal receiving module which is used for receiving a downlink signal from a star chain satellite and a star chain signal reflected by an unmanned aerial vehicle, and obtaining original signal data; the signal processing module is used for carrying out noise reduction, filtering and feature extraction on the received signal and analyzing feature information in the signal; the target detection module is used for detecting the existence of the unmanned aerial vehicle by utilizing the feature information and combining orbit data of the star chain satellite and applying machine learning or a probability model, and identifying a target type at the same time; and the positioning module is used for calculating the position and the movement track of the unmanned aerial vehicle by analyzing the signals from the plurality of star chain satellites, and updating the dynamic position of the unmanned aerial vehicle in real time. The method can adapt to complex environments and diversified unmanned aerial vehicle types, and has the advantages of global coverage, high real-time performance, high anti-interference capability and the like.

The application discloses a kind of real-time positioning method and device of intruding sound source target, belong to acoustic wave detection field.The real-time positioning method includes using distributed acoustic wave sensing optical cable to construct detection network, obtains the acoustic wave signal and its power spectral density characteristics of intruding sound source target from detection network, can further obtain the time difference of acoustic wave to each sensing channel after filtering, according to the maximum value of time difference, construct pseudo-random number of Gaussian distribution and introduce it to time difference, and the corresponding intruding sound source target position estimation value can be obtained by calculation, the estimation value with the highest occurrence probability is obtained as the final intruding sound source target position by repeating calculation, the detection and positioning of intruding sound source target in network are realized.The problem that environmental noise influence cannot be eliminated in the prior art, leading to the problem that accurate and rapid positioning of intruding sound source target cannot be realized, the real-time, detection range and positioning accuracy of intruding sound source target are effectively improved.

The utility model belongs to the technical field of smart home, and discloses a double-PIR lens structure applied to a doorbell, which comprises a lens main body and two lens body parts, the two ends of the lens main body are respectively provided with an arc-shaped bending part, the two lens body parts are arranged on the left side and the right side of the lens main body, and the two arc-shaped bending parts are arranged on the lens main body. One end of each lens body part, which is far away from the center of the lens main body, is arranged on the corresponding arc-shaped bending part, one lens body part is focused on the sensing position of one PIR sensor of the doorbell, and the other lens body part is focused on the sensing position of the other PIR sensor of the doorbell. The left and right detection angles can reach 180 degrees, the upper and lower detection angles are 55 degrees, the detection range is greatly expanded, the two mirror body parts are symmetrically distributed and accurately matched with the double-PIR sensor layout of the doorbell, left and right partition independent focusing is achieved, detection blind areas are avoided, and the sensing ability of the doorbell to people approaching in different directions is effectively improved.