26results about How to "Solve the distance problem" patented technology

The invention provides a law enforcement instrument recording channel audio parameter automatic debugging method and system and a medium. The method comprises the steps of obtaining audio data of a law enforcement instrument in a preset time period, extracting background noise data and volume data, performing processing according to the background noise data, obtaining scene category feature data, further obtaining a volume threshold value, and comparing the volume threshold value with the volume data to obtain a volume deviation ratio; processing according to a working instruction of the law enforcement instrument in combination with the scene category feature data and the volume deviation ratio to obtain audio parameters, performing remote pickup or talkback to obtain real-time environment audio data, extracting audio feature data, adjusting the audio parameters to obtain audio optimization parameters, and performing remote control on the audio optimization parameters to obtain the real-time environment audio data. Performing long-distance pickup or talkback according to the audio optimization parameters; therefore, automatic calling and intelligent optimization of the audio parameters of different working instructions of the law enforcement instrument are realized, the problem of conflict between long-distance pickup and talkback howling of the law enforcement instrument is solved, and the adaptability of the law enforcement instrument is improved.

The invention discloses ultrasonic continuous welding equipment for variable-thickness workpieces and a welding method of the ultrasonic continuous welding equipment. The ultrasonic continuous welding equipment comprises a workbench for clamping the workpieces, a pre-pressing mechanism, a welding head assembly and a consolidation mechanism, wherein the pre-pressing mechanism, the welding head assembly and the consolidation mechanism are sequentially arranged above the workbench in the Y direction and synchronously move in the X direction, the Y direction and the Z direction along with a back plate. The consolidation mechanism comprises a consolidation seat and a moving block which are arranged up and down, the consolidation seat and the moving block are combined with an upper rod and a lower rod to form a parallelogram structure inclining towards the welding head assembly, and the lower rod is assembled in a long hole of the consolidation seat in a sliding mode through a moving pin; the movable block is provided with a swing block through a first rotating piece, and the bottom surface of the swing block is provided with a consolidation block. The length direction of the long hole and the axial direction of the first rotating piece are both arranged in the Y-axis direction. The pre-pressing mechanism comprises a pre-pressing base, a swing arm is rotationally installed on the pre-pressing base and inclines towards the welding head assembly, and a pre-pressing roller is installed at the bottom end of the swing arm. Therefore, the distance problem is solved, the device is particularly suitable for welding of workpieces with variable thicknesses, the welding quality is greatly guaranteed, and the welding flexibility is guaranteed.

The invention discloses a networked vehicle queue system model prediction control method based on data driving. The method comprises the steps that motion data sets of different vehicle types in a vehicle queue system are acquired; carrying out data driving modeling on the longitudinal dynamics of the vehicles in the vehicle queue by combining deep learning and a Koopman operator theory to obtain a data driving model; determining a communication topological structure and a system control target; based on the data driving model, a distributed model prediction control algorithm is designed, controller design is achieved, and finally the purpose that the vehicle queue system keeps stable driving of an expected target is achieved; according to the method, non-convex optimization problem solving caused by nonlinear model constraint is avoided.

The present invention discloses an inverse synthetic aperture imaging method based on a frequency diversity array, which intercepts the effective time period within the scanning cycle of FDA for a certain target, repeatedly transmits the effective time period, and uses the formed repeated signal as the transmitting beam of ISAR. The method utilizes the time period pointing to other useless directions, and continuously transmits a focused beam in the direction that needs to be detected, thereby achieving a stable tracking effect. In addition, the beam generated by this method also solves the distance angle coupling problem existing in FDA. At the same time, the continuous FDA beam can obtain the distance resolution capability, and obtain the azimuth image resolution capability through the relative motion between the target and the radar, which enables the radar imaging system to have the ability of two-dimensional imaging, and finally uses the imaging algorithm to perform two-dimensional imaging on the target.

The invention discloses a talkback method combining a public network talkback module and a traditional talkback module. Which comprises an interphone and a background management platform, and comprises the following steps of: 1, configuring channel parameters; 2, establishing connection between the interphone and a public network, and downloading and configuring channel parameters; and 3, executing corresponding work according to different conditions. According to the invention, the public network talkback module sends channel parameters to the digital / analog module, so that channel setting of a group is realized, and talkback information is automatically forwarded when no public network signal exists; the interphone channel setting efficiency is integrally improved, the tedious process of one-by-one operation is avoided, the problem of distance limitation of an existing traditional interphone is solved, and a wider coverage range is achieved; when no public network signal exists, the automatic forwarding function ensures the transmission of talkback information, and the practicability and reliability of the interphone are enhanced.

The invention discloses a snake wound classification and recognition model construction method based on serum marker electrochemical detection and deep learning, and belongs to the technical field of biosensing and intelligent diagnosis. The method comprises the following steps: firstly, screening based on proteomics to obtain multiple serum protein biomarkers related to snake bite types, constructing a multi-electrode electrochemical sensing platform, and collecting electrochemical signals through cyclic voltammetry (CV) to obtain electrochemical fingerprint characteristics of a serum sample; and after the obtained signal is subjected to normalization and data enhancement processing, the signal is input into a one-dimensional convolutional neural network (1D-CNN) model for feature learning and classification identification. Through combination of multi-index detection of biomarkers and an end-to-end deep learning algorithm, the method realizes rapid and accurate identification of three different snake wound types of agkistrodon acutus, cobra and trimeresurus remeresurus. The invention constructs a high-sensitivity and rapid diagnosis method for snake wounds, and the method has good popularization and clinical transformation potential.

The invention discloses an additive preparation method of a silicon carbide optical reflector based on green recycled biomass waste, and relates to the technical field of optical element manufacturing. The problems that in a common silicon carbide additive manufacturing process, due to the interface problem of carbon and silicon, the migration distance of diffusion elements and other reasons, a long reaction path needs to be crossed for the carbon-silicon reaction, the generated reaction layer further plays a blocking role, the carbon-silicon reaction is difficult, the number of residual materials is large, and multiple times of synthesis are needed are solved. The space and distance required by the carbon-silicon reaction are reasonably controlled by prefabricating micropores and designing a complex multi-channel printing structure, the problems of long diffusion distance and reaction limitation of the carbon-silicon reaction are solved, the reaction time for element migration is shortened, and one-time in-situ synthesis of a silicon carbide three-dimensional structure is implemented. The invention can obtain the additive preparation method of the silicon carbide optical reflector based on the green recycled biomass waste.

The invention relates to a control and acquisition method of a pulse forming machine based on labview. Belongs to the technical field of electromagnetic pulses. The method is mainly characterized in that (1) an upper computer which is provided with labview software and is deployed in a Windows system is adopted, and the upper computer is in communication connection with a control and acquisition system plc of the pulse forming machine through a serial port; (2) inputting molding parameters and working instructions set by the pulse forming machine according to a user through a parameter setting module; (3) the system control module is used for enabling the pulse forming machine to complete corresponding actions and feeding back action results and data to the acquisition and analysis display module; and (4) simultaneously, the data acquisition and analysis display module circularly reads all the time, automatically identifies correct data, and displays an output result on the upper computer. The control method has the characteristics of saving manpower and time cost, being capable of being used for cycle operation and greatly improving the production automation level, and is mainly used for automatic charging and discharging of the pulse forming machine and signal acquisition.

This invention discloses a content security assessment method based on a multi-turn interaction intent accumulation graph, comprising: receiving multi-turn dialogue data; identifying intent in each turn of dialogue to obtain intent type and basic risk score; constructing an intent accumulation graph, treating each turn of dialogue as a node, and determining the weight of edges between nodes based on a predefined logical dependency matrix; calculating the comprehensive risk value of the current turn using a nonlinear accumulation formula that integrates time decay and intent path accumulation based on the intent accumulation graph; comparing the comprehensive risk value with an interception threshold, and triggering corresponding defense actions based on the comparison result. This content security assessment method based on a multi-turn interaction intent accumulation graph achieves accurate detection of progressively induced attacks in multi-turn dialogues through a collaborative mechanism of intent graph modeling and nonlinear risk accumulation, significantly improving the accuracy, real-time performance, and adaptability of content security assessment.

The utility model belongs to the technical field of electronic components, concretely relates to a chip transformer, including magnetic core, cladding layer and electrode, wherein, magnetic core includes I -shaped magnetic core and chip magnetic core, the cladding layer is in I -shaped structure and is cladded in the outside of I -shaped magnetic core, and the cladding layer is set up in open -mouthed type near chip magnetic core side, the cladding layer end portion is provided with a plurality of electrodes away from chip magnetic core side, the both ends of I -shaped magnetic core with the chip magnetic core between be provided with air gap structure, the air gap structure includes first air gap spacer close to the end of I -shaped magnetic core, second air gap spacer close to chip magnetic core and the magnetic sheet setting between first air gap spacer and second air gap spacer.

The present invention discloses a satellite-aircraft bistatic synthetic aperture radar combined mode imaging method, belonging to the field of signal processing technology. The phase error introduced by azimuth spectrum aliasing in the range processing process is avoided by improving the range processing flow; the azimuth processing flow is improved, while avoiding aliasing in the time-frequency domain of azimuth processing, more degrees of freedom are introduced, and the high-order space variation in azimuth is balanced; an accurate calculation method for Doppler space variation parameters of combined mode satellite-aircraft bistatic SAR is proposed, which can obtain high-precision de-skew factors and NLCS equalization factors, and realize efficient and high-precision processing of combined mode satellite-aircraft bistatic SAR. The method of the present invention solves the problem of imaging processing difficulties caused by the complex range migration characteristics and Doppler characteristics of bistatic SAR echo signals, and solves the problem of decreased keystone interpolation accuracy caused by azimuth spectrum aliasing. Simulation results show that the method can effectively realize accurate imaging processing in the satellite-aircraft bistatic SAR combined imaging mode.

The present invention discloses an adaptive fusion positioning method assisted by active features in a point cloud sparse scene, and solves the problem of reduced positioning accuracy or even inability to position laser SLAM due to sparse point clouds through a multi-sensor fusion solution. The observation amount of laser radar is increased by laying active features on the roadside, and UWB distance observation information is introduced to identify the active feature number scanned by the laser radar; at the same time, the observation accuracy of laser radar and UWB is classified by a fuzzy logic classification algorithm, so as to adaptively adjust the noise variance matrix of laser radar and UWB; finally, the fusion positioning of the vehicle is realized by an extended Kalman filter algorithm. It has the advantages of low cost, high accuracy and good real-time performance.

The utility model discloses an orthopaedic splint structure convenient to fix, which comprises a plurality of adjusting belt bodies, a plurality of movably connected fixing splints are connected onto the adjusting belt bodies, a nursing interlayer is arranged among the plurality of fixing splints, two sides of the nursing interlayer are fixedly connected onto the adjusting belt bodies, filling cavities are arranged on the fixing splints, and the filling cavities are communicated with the nursing interlayer. Contact sponge is installed in the filling cavity, and a fixing bandage is arranged on the rear side of the nursing interlayer. The fixing clamping plates which are movably connected are connected to the adjusting belt body, a user can adjust the number of the corresponding fixing clamping plates according to needs, the distance between the corresponding fixing clamping plates can also be adjusted according to needs, and the problem that in the prior art, the number and the distance of the fixing clamping plates connected through connecting belts cannot be changed is solved; the problem that skin pores of a patient are blocked due to the fact that the fixing splint is in direct contact with the skin of the patient is solved, rehabilitation of the patient is facilitated, and rehabilitation efficiency is improved.

The invention discloses a distributed quantum key management system and method, and the system comprises a key management center which is used for receiving a quantum key through an internal network; the secret key distribution mechanism is connected with the secret key management center and the secret key application equipment in an off-line mode, and is used for receiving the secret key distributed by the secret key management center and distributing the secret key to the secret key application equipment; the key application equipment is used for receiving a first key distributed by the key distribution mechanism and a second key distributed by the key distribution mechanism or the key management center, and selecting a key from the first key and the second key for mixing to obtain a mixed key; a replacement key is selected from the mixed keys to replace the key selected from the first key during mixing, and the other keys are working keys for communication between the first device and the second device. According to the method and the system, the distributed quantum keys are shared by multiple devices in combination with quantum key distribution, the problems of cost and distance are solved, and the quantum keys are possibly used in a large quantity.

The utility model belongs to the field of sensor transmitting terminal manufacturing, and particularly relates to a sensor transmitting terminal which comprises a main shell, a convex lens, a reflective mirror, a concave lens and a light source body, the convex lens, the reflective mirror and the concave lens are arranged in the main shell, a small hole is formed in the side, opposite to the light source body, of the concave lens in the main shell, and the axis of the small hole coincides with the axis of the concave lens. Light rays emitted by the light source body penetrate through the geometric center and the focus of the concave lens, then can enter the reflective mirror through the small hole and can penetrate through the geometric center and the focus of the convex lens after being reflected by the reflective mirror, and protrusions are arranged on the side wall, parallel to the light emitting direction of the light source body, of a shell of the light source body. The main shell is provided with a sliding groove matched with the protrusion, and the length line of the sliding groove is parallel to light which can penetrate through the geometric center and the focus of the concave lens at the same time. The problem of how to adjust the distance between the light source body and the concave lens under the condition that the position of the light source in the radial direction of the concave lens is not changed is solved.

The invention discloses a device and method for testing the detection distance of an infrared camera, and solves the technical problems that an indoor test device is large in size and an external field test is seriously influenced by weather, and the device for testing the detection distance of the infrared camera comprises a collimator, an electric target wheel, a surface source black body, an infrared camera installation position and a control computer. An infrared camera mounting position is arranged at a preset distance away from the exit port of the collimator; an electric target wheel is arranged at an incident port of the collimator; the control computer is electrically connected with the electric target wheel and is used for controlling the automatic switching of a plurality of target positions of the electric target wheel, so that the target on any one of the plurality of target positions is positioned at the focal plane of the collimator; the surface source black body is located on the side, away from the collimator, of the electric target wheel and used for irradiating the target, and the radiation aperture of the surface source black body completely covers the target located on the focal plane of the collimator. The control computer is connected with the surface source black body to control the temperature of the surface source black body; and the control computer is connected with the infrared camera so as to receive an infrared image shot by the infrared camera.

The invention relates to a camera calibration method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring a first calibration image collected for an L-shaped light-emitting calibration object and a second calibration image collected for a T-shaped light-emitting calibration object under a plurality of visual angles; identifying a first feature point location of a first light-emitting mark of the L-shaped light-emitting calibration object from the first calibration image; initial camera parameters are obtained through calibration according to the first feature point positions under the multiple visual angles; identifying a second feature point location of a second light-emitting mark of the T-shaped light-emitting calibration object from the second calibration image; determining a three-dimensional distance between the second luminous marks by using the initial camera parameters and the second feature point positions under the same visual angle; and calibrating the initial camera parameter according to the difference between the physical distance and the three-dimensional distance between the second luminous marks to obtain a target camera parameter. By adopting the method, the flexibility and applicability of camera calibration can be improved.

The invention discloses a single-module multi-channel self-adaptive frequency self-modulation repeater, which adopts single-module communication and can prevent the problem of mutual interference of multiple modules. The repeater frequency points can configure and set uplink and downlink receiving and transmitting frequency points, the specific scanning frequency point number and single frequency point CAD scanning time, the total CAD scanning time is automatically adjusted, different LoRa network configurations and applications are supported, and the utilization rate is improved; the relays can mark, identify and count data, so that a ping-pong mode is prevented from being generated between the relays, and the whole network is ensured to be in effective communication for more time; the repeater can set the number of times of multi-hop to prevent excessive forwarding from influencing the real-time performance of data and reduce invalid occupation during multi-relay; the repeater can be configured and set as a relay of a plurality of multi-frequency-point terminals, can also be set and configured as a relay of independent terminal nodes, and is not shared with other terminals. According to the repeater, the communication coverage range of the LoRaWAN is effectively improved, and the problem of insufficient distance or signal blind area is solved.

The present invention discloses a frequency diversity MIMO radar parameter estimation method based on the matrix beam principle, the method comprising: firstly, the receiving signal model of the frequency diversity MIMO radar is derived and the coupling relationship between the angle and the distance in the transmit-receive steering vector is analyzed; secondly, the augmented matrix beam is constructed using the echo signal obtained after matched filtering at the receiving end; then, the augmented matrix beam is subjected to matrix decomposition and transformation to obtain the diagonal phase matrix containing the angle and distance information respectively. Finally, considering the coupling and matching problem of the angle and distance parameters of the target, the same characteristic vector is used to achieve matching and realize accurate positioning of the target. Simulation results show that compared with the prior art, the present invention exhibits superior estimation performance under low snapshot number and low signal-to-noise ratio.

The present invention discloses a device and method based on pet health monitoring, which relates to the field of heart rate detection equipment. The device and method include two fixed restraint belts fixed to the pet's body surface, a connecting belt connecting the two fixed restraint belts, and a monitoring component installed on the upper surface of the connecting belt. The monitoring component is used to fit the pet's body surface. The monitoring component includes a positioning module and a signal acquisition module, a signal amplification module, an A / D conversion module, a signal denoising module, a D / A conversion module and a wireless communication module that are sequentially connected. The positioning module is signal-connected to the D / A conversion module, and the wireless communication module is signal-connected to a control terminal. The problem in the prior art that the heart health of the pet cannot be monitored and discovered in a timely manner is solved.

The utility model discloses a telescopic mechanical gripper structure for a robot, and relates to the technical field of mechanical grippers. The device comprises a positioning seat and a movable seat arranged on one side in the positioning seat in a penetrating mode, and further comprises an isolation cover shell arranged in the middle of one side of the top of the positioning seat, a servo motor is arranged at the front end of the isolation cover shell, and a shaft body is rotationally connected to the middle of the position between the two ends in the isolation cover shell. The servo motor drives the transmission gear to rotate positively and negatively and drives the movable rack to horizontally reciprocate, so that the movable seat is driven to telescopically move at the position penetrating through one side of the interior of the positioning seat, and the effect of driving the mechanical claw to telescopically move to accurately position, clamp, pick and place articles is achieved. The problem that the stroke distance of a mechanical arm of a robot is too long or too short when articles are clamped, taken and placed is solved, the applicability of the mechanical claw is improved, the downtime caused by clamp replacement is shortened, and the production efficiency is improved.

The utility model discloses an adjustable unmanned aerial vehicle bottom supporting frame, and relates to the technical field of unmanned aerial vehicle related equipment, the adjustable unmanned aerial vehicle bottom supporting frame comprises a vehicle body, the bottom surface of the vehicle body is fixedly provided with a clamping plate, and the outer surface of the clamping plate is slidably connected with a supporting plate. According to the utility model, the design structure is reasonable, the rotating rod can be rotated to drive the threaded rod to rotate through the cooperation among the rotating rod, the threaded plates, the first screw rod and the contact plates, and the threaded rod drives the two threaded plates to get close to each other or get away from each other, so that the distance between the two contact plates can be adjusted; the problems that according to an existing supporting frame, the height and distance of supporting legs cannot be adjusted basically, the distances of the supporting legs suitable for unmanned aerial vehicles of different sizes are different, and if a vehicle body is long and the distance between two pairs of supporting legs is short, the center of the unmanned aerial vehicle is unstable when the unmanned aerial vehicle touches the ground, and a chassis is damaged are solved.

The invention relates to an electromechanical servo variable-pitch mechanism for small and medium-sized underwater vehicles, which recombines the functions of a ball nut sleeve, a ball nut sleeve bracket, a guide strip and a decoupling bearing, and achieves the purposes that a variable-pitch motor is fixed, and a lead screw transmission assembly only transmits variable-pitch thrust and does not rotate along with a hub. The variable pitch motor and the aircraft are fixed together through the fixed supporting frame, electric power and communication signals of the variable pitch motor can be conveniently transmitted, and the problem caused by using a sliding ring is avoided. According to the invention, electromechanical servo is adopted to realize pitch change, the problem of pitch change of small and medium-sized underwater vehicles is solved, and the development requirement of full electrification is met at the same time.

The multifunctional matrix distance light and projection module comprises a lens body, the light inlet end of the lens body is provided with a light source module, a main light type total reflection module, a light inlet lens module and a projection light type total reflection module, and the light outlet end of the lens body is provided with a light outlet lens module; the main light type total reflection module comprises a plurality of pixel total reflection modules arranged in an array, the light source module comprises a plurality of main light type light source modules, and the light inlet lens module comprises a plurality of main light type light inlet lens modules; the projection light type total reflection module comprises a plurality of projection total reflection modules, and the projection total reflection modules are distributed on the two sides of the main light type total reflection module; the light source module comprises a plurality of projection light source modules, and the light inlet lens module comprises a plurality of projection light inlet lens modules. According to the invention, the difference between the target distance and the projection distance of the matrix distance light is solved, and multiplexing of the matrix distance light and the projection function is realized.

The invention discloses a control device for a total station protective cover. The control device can receive a control instruction issued by a server, and realize automatic control of a protective cover driving motor based on the control instruction, so as to complete the rising, falling and stopping of the protective cover. Therefore, the use of the control device realizes automatic control of the protective cover on the total station, which not only saves time and labor, but also improves measurement efficiency, and is suitable for large-scale application and promotion.

The wireless optical charging system of the present invention comprises: a transmission unit for transmitting a laser beam as light with increased energy through resonance; and a receiving unit for receiving the light transmitted from the transmission unit and converting a part of the energy of the received light into electric energy to charge the device. The present invention has the effect of being able to solve the distance limitation and the harmfulness to the human body by using the laser resonance power transmission technology.