43results about How to "Long detection distance" patented technology

The invention discloses a multi-source fusion detection and formation recognition system for an unmanned aerial vehicle cluster. The multi-source fusion detection and formation recognition system comprises a radar detection system, a photoelectric detection system and an information processing module. The invention further discloses a multi-source fusion detection and formation recognition method for the unmanned aerial vehicle cluster. The method comprises the steps that the radar detection system obtains the initial azimuth information of the unmanned aerial vehicle; the information processing module generates guidance information according to the initial azimuth information; the photoelectric detection system tracks the unmanned aerial vehicle according to the guidance information to obtain an image of the unmanned aerial vehicle; and the information processing module obtains the three-dimensional position information of the unmanned aerial vehicle according to the initial azimuth information and the unmanned aerial vehicle image, carries out the recognition of the unmanned aerial vehicle cluster formation pattern, and obtains a formation pattern structure. According to the method, accurate identification and three-dimensional coordinate acquisition of individual targets in a long-distance high-resolution unmanned aerial vehicle cluster and feature identification of the formation of the unmanned aerial vehicle can be realized, and high-reliability information support is provided for command, control and strike decisions.

The invention belongs to the technical field of multi-sensor data fusion, and discloses a flight path fusion method for a low-altitude anti-unmanned aerial vehicle system. The anti-unmanned aerial vehicle system comprises a radar detection module, a photoelectric detection module and a fusion processing module, and the fusion processing module receives sensor track data of a target within a period of time and performs data calibration, data correlation, state estimation and other operations on the sensor track data of the target. Radar track data and photoelectric track data of a target can be obtained at the same time, and the method has the advantages of long detection distance, early discovery, accurate angle measurement, few false alarms and the like; and the fusion processing module receives the radar track data and the photoelectric track data, then carries out coordinate conversion and matching, and finally carries out fusion processing on the radar track data and the photoelectric track data of the target, so that target fusion track information with more comprehensive information is obtained, and subsequent target identification is facilitated.

The invention discloses a large-aperture wide-spectrum imaging lens and electronic equipment. The lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens from the object side to the image side. The first lens has positive diopter, and the object side face of the first lens is a convex face. The second lens has positive diopter, the object side surface is a convex surface, and the image side surface is a convex surface; the third lens has negative diopter, the object side surface is a concave surface, and the image side surface is a concave surface; the fourth lens has positive diopter, the object side surface is a concave surface, and the image side surface is a convex surface; the fifth lens has negative diopter, the object side surface is a concave surface, and the image side surface is a concave surface; the sixth lens has positive diopter, the object side surface is a convex surface, and the image side surface is a convex surface; and the seventh lens has negative diopter, the object side surface is a concave surface, the image side surface is a concave surface and the like. According to the invention, large-aperture imaging is realized by selecting a large-aperture initial structure and setting a required clear aperture parameter. A wide spectrum wavelength is adopted as the wavelength of the system, wavelength weights are set on a sensor response curve according to different wavelengths, visible and infrared defocusing amounts are considered, meanwhile, visible and infrared multi-structure configurations are additionally arranged to observe the imaging quality condition, and the nine-piece and six-group optical system is designed.

The invention provides an optical system of a laser radar transmitting lens. The optical system comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, an optical filter, protective glass and an image surface which are arranged in a direction from an object side to an image side. According to the invention, by reasonably using the lenses with specific shapes and structures and limiting the focal power of each lens, the field angle of the optical system is increased to 150 degrees and the relative illumination is greater than 90%, the radar detection field of view is wider and clearer, the F-theta distortion is less than 1%, the CRA is less than 1 degree, the detection distance and precision are improved, and the detection cost is reduced. According to the utility model, more accurate distance measurement data and farther detection distance can be provided, TTL is 29 mm, the size is small, miniaturization can be realized, the camera can be arranged in a vehicle, the matching of 2G3P glass and plastic enables the whole optical system to optimize high and low temperature excursion compensation, it is ensured that the lens does not have virtual focus at high and low temperatures, the cost is more advantageous, and the cost performance is higher.

The invention discloses a laser gas telemetering imaging system based on micro galvanometer scanning and a detection method, the system comprises: a laser transmit-receive optical unit, detection laser emitted by a semiconductor laser and aiming laser emitted by an aiming laser are combined by a beam combiner, and are collimated to an MEMS micro galvanometer through a collimation system; the MEMS micro galvanometer deflects by a corresponding angle to reflect the laser beam to a target detection area; the photoelectric detector array is used for receiving a light return signal of the detection laser; the signal processing and control unit is used for calculating the concentration information of the target gas in the target detection area according to the return light signal subjected to photoelectric conversion; the visual imaging unit is used for shooting a visual image of the detection area; and the information fusion unit is used for fusing the calculated gas concentration of the target detection area into a visual image, and sending the fused visual image to the signal output display unit for visual display of the gas concentration.

The invention discloses a dual-band infrared image decision fusion detection method of a monocular Cassegrain structure. The method comprises the following steps: building a binocular vision platform of medium-wave infrared and long-wave infrared of the Cassegrain structure; obtaining an unmanned aerial vehicle target image of medium waves and Cassegrain structure long waves; the method comprises the following steps: constructing a KANyov10 pre-detection head; a multi-scale feature fusion module is adopted to carry out fusion processing on the unmanned aerial vehicle target images of the medium waves and the Cassegrain structure long waves, and a fusion image of the unmanned aerial vehicle target is obtained; and inputting the fused image into a KANyov10 pre-detection head, and outputting a detection result of the unmanned aerial vehicle target. According to the method, under the condition that completely strict pixel alignment is not needed, hardware equipment is utilized to amplify the region of interest, the features of the unmanned aerial vehicle target are enhanced, and the detection precision of the weak and small target under the complex background is improved through decision-level fusion.

The utility model discloses a long-distance optical fiber detection head, and relates to improvement of an optical fiber detection device, in particular to improvement of the long-distance optical fiber detection head. The detection head comprises a detection head shell, a light-emitting optical fiber, two light-emitting convex mirrors, a light-receiving optical fiber and a light-receiving convex mirror, two light-emitting convex mirrors are arranged on the upper portion in the detection head shell, light-emitting optical fibers are arranged on the right sides of the two light-emitting convex mirrors, a light-receiving convex mirror is installed on the left side of the lower portion in the detection head shell, and light-receiving optical fibers are arranged on the right side of the light-receiving convex mirror. Fixing holes are formed in the upper portion and the lower portion of the detection head shell, and fixing clamping columns are arranged in the fixing holes. The device has the advantages that the device has a longer detection distance and maintainability, a plurality of detection heads can be combined and mounted, the production process can be greatly shortened, the production process is greatly simplified, the labor demand is saved, higher detection requirements can be met, and meanwhile, the overall production and use cost is greatly reduced.

The utility model provides an ultrasonic sensor structure of promoting detection distance, including shell, the utility model discloses the cooperation structure of coating piece and mounting bracket effectively guaranteed the free vibration state of piezoelectric ceramic piece in foamed colloid filling environment, mounting bracket and piezoelectric ceramic piece do not contact each other, and the piezoelectric ceramic piece of mounting rack top hollow portion inserts the coating piece and ceramic piece top and sticks together but does not produce rigid restraint, make the radial vibration of ceramic piece not be restrained by any solid structure's clamping or bonding, and coating piece will foamed colloid and ceramic piece completely isolate, avoid the damping effect that foamed colloid solidification and ceramic piece surface bonding produce, make ceramic piece can vibrate freely with maximum amplitude, and the electric energy is converted into sound energy and radiates outward with maximum limit, and coating piece as sound matching layer can also reduce the sound wave reflection loss caused by sound impedance difference, further promote sound energy transmission efficiency.

A broadband athermal optical system based on a global surface lens is characterized by the following components arranged sequentially from the outside to the inside along the light propagation direction: a protective window, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a detector photosensitive surface (image plane). The protective window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens are coaxially arranged with the detector photosensitive surface (image plane). The optical system receives visible light reflections and short-wave infrared radiation information inherent to the target and background, and converges them onto the detector photosensitive surface for photoelectric conversion. It exhibits high sensitivity and relatively low spatial resolution, enabling target detection, identification, and precise positioning under all-weather and complex meteorological conditions. This invention belongs to the field of optical imaging technology. The optical system exhibits excellent imaging quality, strong light-gathering ability, and good environmental adaptability within a wide spectral and temperature range of 0.4μm to 2.3μm and -50℃ to +70℃. It features simple structure, easy assembly and adjustment, high reliability, low cost, good manufacturability, and high yield. It can be widely used in aerospace optical remote sensing, ground-based target tracking and detection, optical imaging guidance, astronomical observation, industrial multispectral imaging analysis and non-destructive testing, and civil security surveillance, with broad application prospects and significant economic benefits.

The invention relates to the technical field of optical sensors, in particular to an expandable cascade diffuse reflection laser sensor, which comprises a master device and at least one slave device, the master device and the slave device are communicated through a synchronizing signal and a voltage division sampling signal, and the synchronizing signal and a voltage value are used for controlling the working states of a transmitting end and a receiving end in a time-sharing manner. Compared with the prior art, mutual interference when a plurality of sensors are close to each other is effectively avoided, in addition, synchronous signals of the master device and the slave device are PWM signals, the maximum frequency is 40 KHz, the timer interruption time is 2 microseconds, and the accuracy and effectiveness of receiving ADC sampling are ensured (when an on-chip ADC is used for sampling receiving, the PWM frequency needs to be reduced, and the timer interruption time needs to be increased). The number of the slave devices can be flexibly increased according to actual requirements, and the expansibility and flexibility of the system are improved.

This disclosure presents an integrated navigation system combining a BeiDou front-end and a radar front-end, comprising a backplane mechanism; a radar antenna structure mounted in the middle of the backplane mechanism; and a BeiDou antenna structure mounted on the top of the backplane mechanism. Using an exemplary embodiment of this disclosure, supporting foam is added above the BeiDou antenna and the radar antenna to support the metamaterial above the antenna. Because the dielectric constant of the foam is close to that of air, it allows for good matching between the antenna and the metamaterial, enabling the metamaterial to enhance antenna gain and thus improve the overall system's signal reception capability. Alternatively, the antenna itself and the metamaterial can form an integral structure. The exemplary embodiment of this disclosure enables the integration of the BeiDou satellite navigation system and the radar obstacle avoidance system without altering the original navigation radar mechanism, and enhances radar power, giving it a longer detection range.

The utility model relates to a glue-pouring-free microminiature separation type diffuse reflection photoelectric switch inductive head, in particular to an improvement of a separation type diffuse reflection photoelectric switch inductive head, which comprises an inductive head, an optical fiber line, an electric wire and an outgoing line sheath, and the inductive head comprises a tube body, a light guide part, an assembly part, a luminous tube, a convex lens, a connecting part and a fixed clamping column. A light guide part is arranged in the tube body, an assembly part is arranged in the light guide part, and a connecting part is arranged on the right side of the light guide part; a convex lens is arranged on the left side in the assembly part; and the connecting piece is provided with an optical fiber cable at the upper part, an electric wire at the lower part and a fixing hole in the middle. The light guide piece is in butt joint with the optical fiber through the connecting piece, the fixing hole is provided with the fixing clamping column used for clamping the optical fiber and the electric wire, and installation is convenient. The sensor has the advantages that the sensing distance is longer, the material cost is lower, the production period is shorter, the production process is greatly simplified, glue pouring and grinding are not needed, and meanwhile the overall production and use cost and the environmental protection cost are greatly reduced.

The application discloses a low-cost mid-wave refrigeration athermalization optical system based on a silicon germanium material, which sequentially comprises a fairing, a first lens, a second lens, a third lens, a detector protection glass, a cold light diaphragm and an image plane from outside to inside in the propagation direction of light. The first lens, the second lens, the third lens, the detector protection glass, the cold light diaphragm, the image plane and the fairing are coaxially arranged. The optical system is used for receiving infrared radiation inherent to a target and a background, and converging the infrared radiation onto a photosensitive surface of a refrigeration detector to realize photoelectric conversion, so that the target can be detected, identified and accurately positioned at night or under complex weather conditions. The application belongs to the technical field of optical imaging, can adapt to a harsh missile-borne working environment with a wide temperature range of 110 DEG C and high impact overload, has the characteristics of simple structure, excellent imaging quality, high resolution, strong environmental adaptability, good processing process, easy assembly and adjustment and high yield, is suitable for mass production, and can be widely applied to the fields of optical imaging guidance, search, tracking and reconnaissance.

The present invention discloses a coal mine ventilation monitoring device for industrial environment, which belongs to the field of coal mine ventilation technology, and comprises a pipeline, two positioning columns are fixedly installed on the inner wall of the pipeline, a rotating shaft is rotatably connected to the positioning columns, and symmetrically arranged fan blades are fixedly installed on the sides of the two rotating shafts away from each other, a first motor is fixedly installed on the top of the pipeline, a plurality of air outlets are provided at the bottom of the pipeline, an arc-shaped mounting plate is fixedly installed on one side of the pipeline, an arc-shaped frame is slidably connected to one side of the arc-shaped mounting plate, a mounting box is slidably connected to the arc-shaped frame, and an air guide mechanism is arranged in the mounting box. Through the arrangement of the push plate and the top rod, and the action of the reset spring on the slide plate, and the cooperation of the cleaning brush and the gas sensor, the gas sensor can be automatically cleaned when the arc-shaped frame moves to one side to prevent excessive dust from affecting the detection effect.

The application belongs to the technical field of ground penetrating radar detection, and particularly relates to a multi-channel chaotic ground penetrating radar device for city road disease detection, which solves the technical problems of poor anti-interference ability of the existing multi-channel pulse ground penetrating radar and the problem that the multi-channels cannot work in parallel, wherein the signal generation unit comprises a pulse signal generation module and a chaotic pulse signal generation module; the transmitting and receiving unit comprises N transmitting and receiving subunits, each of which comprises a local oscillator signal generator, a three-way power divider, a first / second / third frequency mixer, a first / second power amplifier, a first / second transmitting antenna, a receiving antenna, a low-noise amplifier and a signal acquisition subunit; the signal matching unit comprises N signal matching subunits, each of which comprises a pulse detector and a pulse interval matching module; and the clock control unit is connected to the pulse signal generation module, the chaotic pulse signal generation module, the signal matching subunit and the transmitting and receiving subunit respectively.

This invention relates to the field of intelligent rail transit technology, providing a track detection method, apparatus, electronic device, and storage medium. The track detection method includes: obtaining target image data representing a track region from image data acquired by a camera; obtaining target point cloud data representing the track region from point cloud data acquired by a lidar based on the camera parameter matrix and the target image data; extracting a transformation matrix from the lidar coordinate system to the track plane coordinate system based on the target point cloud data; obtaining target track data generated by projecting the target image data onto the track plane based on the camera parameter matrix and the transformation matrix; and fitting a target track equation based on the target track data. This invention's track detection scheme combines the sensing capabilities of lidar with the motion-distortion-free and pixel-dense characteristics of camera imaging, improving track detection accuracy, increasing track detection distance, and efficiently and accurately obtaining track detection results.

The present application provides a low-complexity super-resolution 3D estimation method based on millimeter-wave MIMO radar, which solves the technical problems of low angle estimation resolution, poor angle resolution and high computational complexity of existing radars. It includes: using DDM-MIMO radar to obtain discrete intermediate frequency signals, preprocessing them in the frequency domain to obtain an angle data matrix; using an angle super-resolution algorithm to calculate the angle data matrix to obtain a three-dimensional parameter estimation result; wherein, the frequency domain preprocessing includes 2D-FFT preprocessing, target detection and deambiguation by adding additional empty bands; the angle super-resolution algorithm refers to obtaining a covariance matrix through beam space conversion and real-valued transformation, and then using a multi-stage Wiener filter to obtain a signal subspace, constructing and solving the shift-invariant equation of the ESPRIT algorithm, and obtaining a three-dimensional parameter estimation result. The present application can be widely used in the technical field of millimeter-wave MIMO radar.

The invention discloses an automobile radar wave sending and truncation processing method and system, a terminal and a storage medium. The distance dimension sampling point number N1 of a radar waveform is set to be 2048 sampling points, the speed dimension chirp pulse number N2 is set to be 256 chirp pulses, the size D of each sampling point is 2 bytes, the total radar physical receiving channel number numr is 8, and the compression ratio C of a 1DFFT result is 2; the data volume Volummem of each frame is calculated according to the parameters, and it is ensured that the data volume Volummem does not exceed the 3MB upper limit cached by the radar processor L3. Performing 2048-point FFT (Fast Fourier Transform) operation on the original data of the 2048 sampling points corresponding to each chirp waveform of each receiving channel to obtain 1024 distances bins; and then data of the first 768 pieces of distance bins are intercepted from data of the 1024 pieces of distance bins, and the data are compressed to be 1 / 2 of the original data so as to adapt to the 3MB upper limit of the L3 cache. According to the invention, the RAM resource of the radar processor chip can be fully utilized, and the signal processing gain of the radar can be maintained, so that a higher output signal-to-noise ratio and a farther radar detection distance are realized.

The invention provides a safety detector and a safety detection method, the safety detector comprises a magnetic detection subsystem, and the magnetic detection subsystem comprises a magnetic detection front-end circuit, an instrument amplification circuit, a filter amplification circuit and a threshold comparison circuit; the magnetic detection front-end circuit is used for sensing a first voltage corresponding to the to-be-detected object when the to-be-detected object passes through the safety detector and outputting the first voltage; the instrument amplification circuit is used for performing differential amplification on a second voltage corresponding to the first voltage to obtain a third voltage and outputting the third voltage; the filtering and amplifying circuit is used for filtering the third voltage to obtain a fourth voltage and outputting the fourth voltage; the threshold comparison circuit is used for detecting whether the fourth voltage is in a threshold interval or not; if not, a prompt signal is output, and the prompt signal indicates that the to-be-detected object carries the detection target. According to the technical scheme, the safety detector is high in signal-to-noise ratio and long in detection distance.

The utility model discloses a low-cost light-small high-resolution common-aperture dual-waveband refrigeration optical system. The refrigeration optical system is characterized in that a first lens, a second lens, a third lens, a fourth lens, detector protection glass, a cold diaphragm and a detector photosensitive surface are sequentially arranged in the light propagation direction from outside to inside. The first lens, the second lens, the third lens, the fourth lens, the detector protection glass, the cold diaphragm and the detector photosensitive surface are coaxially arranged. The optical system is used for receiving inherent infrared radiation passing through a target and a background and converging the infrared radiation to a photosensitive surface of the medium / long wave dual-band refrigeration detector to realize photoelectric conversion, and the system has relatively high sensitivity and relatively small spatial resolution, and can obtain radiation characteristics of the target in medium / long waves at night or under complex meteorological conditions; a high-performance imaging system is realized, and detection advantages and complementarity of different spectrum bands can be fully utilized to detect, identify and accurately position a target in a complex environment.

The utility model discloses a novel vulcanizing machine manipulator tire contact device, which comprises a tire contact rod, a fixing sleeve, a light eye detection baffle plate and an iron pipe, the fixing sleeve is sleeved outside the tire contact rod, a fixing block is arranged at the bottom end of the tire contact rod and is welded with the tire contact rod, the light eye detection baffle plate is arranged above the tire contact rod, and the iron pipe is connected with the light eye detection baffle plate. A through groove is formed in the center of the interior of the light eye detection baffle, the iron pipes are arranged on the two sides of the top end of the light eye detection baffle, and the iron pipes are welded to the light eye detection baffle. The tire touch device can prevent jamming, reduce faults, improve efficiency, reduce labor intensity, avoid false triggering or non-triggering, increase weight to reduce jamming times, improve working efficiency and reduce labor intensity of personnel.

The invention discloses a night flight airborne early warning device, comprising: an unmanned aerial vehicle component, wherein the unmanned aerial vehicle component comprises an upper mounting plate and a lower mounting plate, wherein a camera device is arranged at the edge of the upper surface of the lower mounting plate, and a laser rangefinder is arranged at the edge of the lower surface of the lower mounting plate. The invention also comprises a center of gravity adjustment component, wherein the center of gravity adjustment component is arranged below the unmanned aerial vehicle component, and wherein the center of gravity adjustment component comprises an installation base, wherein a winding motor and a rope body are arranged inside the installation base, wherein a first through hole is arranged below the installation base, wherein one end of the rope body passes through the first through hole, wherein a driver is arranged at the middle and upper part of the rope body, wherein a connecting rod is arranged on the driver, and wherein adjusting rotors are arranged at both ends of the connecting rod. The invention provides obstacle avoidance data and images by arranging laser rangefinders and camera devices around the unmanned aerial vehicle component and utilizing a combination of visual obstacle avoidance and laser obstacle avoidance. The invention has the characteristics of power saving, long detection distance, fast scanning speed, good light interference resistance, and can realize the functions of multi-angle ranging and ranging without dead angle.

The invention discloses a bucket tooth falling-off monitoring device and an excavator, and belongs to the technical field of mining machinery, the bucket tooth falling-off monitoring device comprises a monitoring mechanism, the monitoring mechanism comprises a monitoring assembly and a magnet assembly, a first connecting position is arranged in a containing groove, and a second connecting position is arranged at the position, right opposite to the first connecting position, of the head of a tooth holder; one of the first connecting position and the second connecting position is provided with a monitoring assembly, the other connecting position is provided with a magnet assembly, the distance between the monitoring assembly and the magnet assembly is a first distance value, and the monitoring assembly judges the first distance value by judging the change of the oscillation amplitude of an LRC circuit of the monitoring assembly caused by the change of the distance between the magnet assembly and the monitoring assembly; and when the oscillation amplitude is higher than a threshold value, the monitoring assembly generates prompt information. The excavator is provided with the bucket tooth falling monitoring device. Through cooperation of the detection assembly and the magnet assembly, the monitoring effect is optimized, and the monitoring distance of the monitoring assembly is increased.

The utility model provides a pipeline internal detection power supply device, which relates to the technical field of pipeline internal detection power supply and comprises a first telescopic rod, a lead screw motor is mounted on one side of the bottom wall of the first telescopic rod, a lead screw is mounted and connected to the output end of the lead screw motor, and a threaded plate is in threaded connection with one side of the surface wall of the lead screw. A second telescopic rod is tightly connected to one side of the top wall of the threaded plate, two sets of first gears are installed on the surface wall of the second telescopic rod, chains are connected to the peripheral sides of the surface walls of the two sets of first gears in a meshed mode, and two chain blocks are installed on the surface walls of the chains in a connected mode. A screw rod rotates to drive a threaded plate to move, and then a chain and a first gear are driven to rotate, so that after a second telescopic rod, a third telescopic rod and a fourth telescopic rod extend out, a user can conveniently detect the power supply device in the pipeline, the working efficiency of detection operation is improved, and the accuracy of a detection result is improved.

The invention discloses a large-aperture large-depth-of-field short-wave infrared vehicle-mounted lens which is applied to a short-wave infrared spectrum band. Comprising a lens L1 with negative focal power, a lens L2 with negative focal power, a lens L3 with positive focal power, a diaphragm STOP, a lens L4 with negative focal power, a lens L5 with positive focal power, a lens L6 with positive focal power and a lens L7 with positive focal power which are sequentially distributed from an object plane to an image plane, and the total optical length TTL, the effective aperture D and the total focal length f of the vehicle-mounted lens meet the conditions that f / D is larger than or equal to 1.4 and smaller than or equal to 1.8, and f / TTL is larger than or equal to 0.1 and smaller than or equal to 0.2. According to the vehicle-mounted lens, the design of large aperture and large depth of field is adopted, the vehicle-mounted lens is more suitable for a long-distance, large-range and low-illumination environment, and clear imaging can be achieved within the object distance range from 0.75 m to infinity without refocusing.

The present invention belongs to the field of polar acoustic technology, and specifically relates to a method and device for locating pulse sound sources on ice using a single vector hydrophone, and performing cross-ice positioning in sea areas covered by polar sea ice. Existing methods cannot well realize the construction of a three-dimensional observation platform in polar regions, and it is necessary to develop new communication technologies to overcome this problem and improve the information transmission capabilities between submarines and other communication equipment. Based on the theory of polar sound propagation, the present invention explores the mapping relationship between the arrival time of different modal wave fields and the spatial position of the sound source, and utilizes the characteristics of the vector hydrophone that can simultaneously receive the amplitude and direction information of the sound wave velocity, and implements the evaluation of the height and distance of the air pulse sound source based on a single array element. The signal attenuation in a complex ice and water environment is reduced, and the signal propagation quality is improved. The cross-medium detection of airborne sound sources underwater can be realized more covertly, while reducing costs and construction risks.

The utility model discloses an induction type ceiling lamp which comprises an inductor, an installation disc, a diffusion ring, a back plate, a light source belt, a shell, a light source plate, a light-transmitting panel and a power source driver. A light source belt is laid around the edge of the upper surface of the light source plate; the light source plate with a light source belt is arranged at the bottom of the back plate; the light-transmitting panel is assembled in the shell and is positioned below the back plate in the shell; the diffusion ring is arranged on the upper surface of the back plate; a power supply driver and a sensor are assembled on the inner side of the mounting disc, and the mounting disc is fixedly connected with the back plate through a fastener; and the back plate is provided with a light outlet hole site. According to the utility model, the microwave sensor is adopted to control the work, the sensitivity is high, the detection distance is long, the influence of light, temperature and airflow is small, and the spatial position of a target and the movement of a human body can be detected in a larger spatial range, so that the lamp is controlled to be automatically turned on and turned off, intelligence and energy conservation are achieved, and the practicability and intelligence are remarkably improved.

The present invention relates to a near-air small target radar monitoring system, including a power module and an azimuth turntable module, wherein the power module is electrically connected with an antenna module, a channel module, a signal processing module and a display control module, the power module supplies power to the entire radar system, the azimuth turntable module is provided with an azimuth turntable, the antenna module, the channel module and the signal processing module are all arranged on the azimuth turntable, the azimuth turntable is connected with a servo motor, the servo motor drives the azimuth turntable to rotate and transmits the azimuth information to the display control module in real time. Under the coordinated work of each module, the present invention can accurately detect birds in places such as airports, farms and substations, the one-dimensional active phased array antenna has a long detection distance, a large pitch angle and a wide coverage range, and can effectively detect and locate birds in real time; through the signal processing and conversion of each module, the detection target can be accurately located, the moving trace can be analyzed, and the bird-repelling work can be effectively carried out.

The invention relates to a radar device, a transportation carrier and a control method of the transportation carrier, the radar device is applied to the transportation carrier, the transportation carrier comprises a detection module used for detecting the current vehicle speed of the transportation carrier, the radar device comprises an installation part, a radar, a driving mechanism and a covering part, and the installation part is used for being installed on the transportation carrier; the radar is mounted on the mounting part and is used for transmitting and receiving radar signals; the driving mechanism is mounted on the mounting part and is electrically connected with the detection module; the covering part is in transmission connection with the driving mechanism, and the driving mechanism is configured to drive the covering part to move according to the detection information of the detection module so as to expose the signal receiving and transmitting side of the radar or enable the covering part to cover the signal receiving and transmitting side of the radar. Under the arrangement of the embodiment, the detection effect of the radar device is good, and the safety performance of the transportation carrier is greatly improved.

The invention relates to a compact medium-wave infrared continuous zooming optical system with a large zoom ratio, which realizes continuous zooming with a focal length of 22-690mm, and comprises a front fixed group, a zoom group, a compensation group, a rear fixed group, a reflector group and a secondary imaging group which are sequentially arranged from the infinity of an object space to a focal plane of an image space, the front fixed group is sequentially provided with a positive meniscus lens A and a negative meniscus lens A from an object side to an image side; the zoom group is a biconcave negative lens B; the compensation group is a biconvex positive lens C; the rear fixing group is a biconcave negative lens D; the reflector group is sequentially provided with a first reflector E, a second reflector E and a third reflector E from the object space to the image space; and the secondary imaging group is sequentially provided with a positive meniscus lens F, a negative meniscus lens F and a biconvex positive lens F from the object side to the image side. The optical system is reasonable in design, has the advantages of high zoom ratio, high resolution, small optical axis drift distance, long detection distance, good imaging effect, compact structure and the like, and meets smooth zoom group and compensation group curves in a full-focus section.