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354results about How to "Reduced versatility" patented technology

Identification method for radar disoperative target based on mixed model

The invention provides an identification method for a radar disoperative target based on a mixed model, which is used for solving the problem that the disoperative target is low in identification rate. The method comprises the following steps: establishing a standard body model library of a refined scattering point model; structurally decomposing the disoperative target according to the standard body model library to generate a first scattering point model; shielding the first scattering point model to obtain an effective scattering point model; calculating RCS intensity for the effective scattering point to obtain intensity information and combining the intensity information to generate a scattering point matrix; adding a statistic characteristic into the scattering point matrix to obtain a second scattering point model of the disoperative target containing coordinate information and the RCS intensity information; carrying out multi-scattering point radar return simulation on the second scattering point model to establish a high resolution one-dimensional range profile template library; and identifying the tested high-resolution one-dimensional range profile by adopting a K near neighbor classifier by virtue of the high resolution one-dimensional range profile template library. According to the method provided by the invention, the target identification performance of the radar system can be improved.
Owner:XIDIAN UNIV

Automatic ball throwing device, directing device therefor and method of making an automatic ball throwing device

InactiveUS7111620B2Improving their defensive and offensive skillsMore practicalFriction-wheel launchersBall sportsEngineeringBiological activation
The present invention provides a ball engagement device for use with a ball launching device, comprising a housing having first and second ends, an opening for accepting balls and a ball chamber adjacent to the opening. The device further includes a motor coupled to the housing and a pinion connected to and driven by the motor. The pinion drives a rack that has a ball engagement end, wherein the rack is slideably disposed along an interior portion of the housing. The device also includes a first switch disposed in the housing and that is operably configured to activate the motor to rotate the pinion in a first direction, the first switch is activatable by the presence of a ball in the ball chamber, a second switch disposed in the housing operably configured to rotate the pinion in an opposing second direction, a third switch disposed in the housing at a predetermined distance from the second switch and operably configured to deactivate the motor and a switch activation member disposed along the rack. Upon activation of the first switch, the motor rotates the pinion in the first direction causing the rack to push the ball out of the first end of the housing, the switch activation member travels with the housing until the activation member activates the second switch which then reverses the direction of the pinion in a second direction causing the movement of the rack towards the second end of the housing until the switch activation member strikes the third switch and turns the motor off. This invention further provides a hopper for use with the ball engagement device.
Owner:JOHNDREAU STEVEN S +1

Method, equipment and system for reducing headset noise

The invention discloses a method, equipment and system for reducing headset noise, aiming at providing a method for reducing the headset noise without addition of hardware equipment and further saving the hardware equipment. The method comprises the following steps of: processing environment noise acquired by an MIC (Microphone) of a headset through a headset interface, an analog/digital conversion circuit, a digital filtering circuit, an audio decoder and a digital/analog conversion circuit of equipment to obtain reverse-phase environment noise corresponding to the environment noise; and overlaying the reverse-phase environment noise into an audio signal and transmitting the reverse-phase environment noise to the headset so that the reverse-phase environment noise and the environment noise heard by human ears can be cancelled out each other to realize noise reduction of the headset. By adopting the technical scheme disclosed by the invention, the headset noise can be reduced without improving the headset, or equipment connected with the headset, the procedure of reducing the headset noise is simplified, the hardware equipment is saved; and the hardware equipment does not need to be improved, thus the commonality and the flexibility of reducing the headset noise are improved.
Owner:QINGDAO HISENSE MOBILE COMM TECH CO LTD

Alternating current (AC) converter for converting high voltage to low voltage

The invention relates to an alternating current (AC) converter for converting high voltage to low voltage in the field of power electronics. The converter comprises an AC chopper circuit, a high-frequency transformer circuit, a rectifier and filter circuit, a waveform conversion circuit and a working frequency inversion circuit which are sequentially connected in series, wherein the AC chopper circuit is used for converting input high-voltage working frequency AC voltage into high-frequency impulse high-voltage AC voltage and outputting the converted voltage to the high-frequency transformer circuit; the high-frequency transformer circuit is used for converting high-frequency impulse high-voltage AC voltage into full wave direct current (DC) voltage and outputting the full wave DC voltageto the rectifier and filter circuit; the rectifier and filter circuit is used for converting the high-frequency impulse low-voltage AC voltage into full wave DC voltage and outputting the full wave DC voltage to the waveform conversion circuit; the waveform conversion circuit is used for boosting the full wave DC voltage, adding input current to the full wave DC voltage and then outputting the combined voltage and current to the working frequency inversion circuit; and the working frequency inversion circuit is used for inverting the DC voltage into working frequency AC sine wave voltage or AC square wave voltage and outputting the inverted voltage. The converter is an AC-AC conversion circuit which has the advantages of small volume, light weight, high efficiency, low cost, simple designand high reliability and can run with a unit power factor.
Owner:SHANGHAI JIAO TONG UNIV

Nuclear power station accident emergency rescue simulation training system

ActiveCN107067868AImprove mental qualityIntelligent assessment assesses professional skillsCosmonautic condition simulationsSimulatorsEmergency rescuePassword
The invention discloses a general nuclear power station accident emergency rescue simulation training system. The system comprises a simulation training module, a nuclear power station simulation module, a command control module and a training special communication module; the simulation training module is used to train participating trainees' nuclear emergency rescue skills through virtual reality means; the nuclear power station simulation module is used to train the participating trainees' nuclear emergency rescue skills in a nuclear power station simulation building and simulate a nuclear accident phenomenon through nuclear accident phenomenon simulation equipment; the command control module is used to train participating trainees' nuclear emergency command skills and remotely control the nuclear accident phenomenon simulation equipment in the nuclear power station simulation module; and the training special communication module is used to achieve communication between the command control module, the nuclear power station simulation module and participating trainees, and achieve uploading and release of a rescue command password and acquisition of video, audio and training parameter data of a rescue training site. The system solves the problem that different pile types are difficult to be compatible in nuclear emergency training, and the system solves the problems of difficult realistic simulation, expensive training cost, difficult quantification assessment and the like in the nuclear emergency training.
Owner:中科超安科技有限公司

Clamp for drilling oil hole on crankshaft

The invention relates to a clamp for drilling oil holes on a crankshaft, which comprises a clamp body, a clamping mechanism, a connecting rod positioning mechanism and a drilling jig frame mechanism, wherein the clamping mechanism is provided with a drilling jig supporting seat, a pressing plate and a replaceable cushion block; the drilling jig supporting seat is movably arranged on the clamp body; the pressing plate is arranged on a pressing plate strut on the drilling jig supporting seat through a hinge pin; the lower part of the pressing plate is provided with a hold-down bolt; the hold-down bolt is screwed in, passes through the pressing plate and presses against the drilling jig supporting seat; a turn-knob compresses the bolt; a spindle neck is compressed or loosened through the lever action of the hinge pin arranged on the pressing plate and the pressing plate strut; the connecting rod positioning mechanism comprises a positioning column and a liner plate; the positioning column is arranged in a replaceable liner plate positioning hole; the top of the positioning column supports a connecting rod neck; and the drilling jig frame mechanism comprises the drilling jig supporting seat, a drilling jig plate and a drill bush. The clamp has the advantages of reasonable structure, convenient assembly, low manufacturing cost, strong popularity, and high efficiency of drilling the oil holes, greatly shortens the manufacturing period, and is suitable for clamping various crankshafts for drilling straight oil holes.
Owner:TIANRUN IND TECH CO LTD

Real-time simulation combined modeling method for power electronic elements based on FPGA

A real-time simulation combined modeling method for power electronic elements based on FPGA is disclosed, which comprises the steps of carrying out modeling, setting the length of real-time simulation steps, establishing combined models, uploading parameters, carrying out simulation, judging condition, calculating historical quantity, calculating voltages, calculating electric currents and judging simulation time. In the offline environment, modeling is carried out on the electric power system by utilizing basic elements of the electrical system. The length of the real-time simulation steps of the electrical system is set for delta t. The combined models are established through the parallel circuit which consists of switching devices and diodes. The parameters are uploaded to the online simulation environment. The simulation starts to be carried out in the online environment. The condition of the switching devices and the diodes is judged. The historical quantity of the switching devices and the diodes is calculated. The voltage of every node is calculated. The electric currents of step branches at the moment of the switching devices and the diodes are calculated. The simulation time whether reaches simulation or not is judged. Single elements can be made by the established models which can carry out combined modeling by utilizing various controllable power electronic devices and the diodes. The real-time simulation combined modeling method for power electronic elements based on FPGA has the advantages of improving the universal property of the power electronic elements modeling, reducing the number of the power electronic elements effectively and improving the processing speed of the power electronic elements in the real-time simulation under the premise of guaranteeing simulation accuracy.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1
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