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483results about How to "Achieve simplicity" patented technology

Intelligent quality test management system and method of WLAN (wireless local area network)

InactiveCN102333329ANetwork Monitoring ContinuousWide coverage areaNetwork topologiesNetwork managementManual testing
The invention discloses an intelligent quality test management system and method of a WLAN (wireless local area network), wherein the method comprises the following steps that: the test mode of a test terminal is set; a service end judges the test mode, if the test mode is an automatic test mode, the service end issues a network quality test task to the test terminal by virtue of a mobile communication network, and the test terminal monitors the quality of the WLAN at a local WLAN access point according to the test task; if the test mode is a manual test mode, the test terminal carries out monitoring according to the manual operation of a user; and then, the test terminal reports monitored data to the service end by virtue of the WLAN; the service end carries out comprehensive analysis, statistic and analysis on the received monitored data and multi-network optimization data such as the network management platform of an operator, a daily maintenance test and the like, and estimates the network quality; and the network quality is shown multi-dimensionally by virtue of a map, a report form and a graph. According to the invention, the universalization of the test terminal, the real-time transmission of the test result and the intelligent analysis on the test result can be realized.
Owner:BEIJING ZHONGJIA SILVERTEC

Sound source locating method based on improved PHAT weighting time delay estimation and implementation system thereof

The invention relates to a sound source locating method based on improved PHAT weighting time delay estimation. The sound source locating method comprises the steps that a microphone array collects four paths of sound signals, the sound signals are converted into digital signals through an A/D sampling circuit, time delay estimation algorithm processing is conducted through an improved PHAT weighting generalized cross correlation function method, a time delay estimation value is obtained, a nonlinear equation system is solved through the iteration method according to the time delay estimation value and the spatial position of the microphone array, and then the relative position of a sound source is obtained. According to the sound source locating method based on improved PHAT weighting time delay estimation, the arrangement of the microphone array is similar to the arrangement of the origin of a rectangular coordinate system and fixed length points on the x-axis, the y-axis and the z-axis; the calculated quantity is small, the device requirement is low, the speed is high, and instant locating is achieved; a sound source locating system is applied to social life, the military field and other aspects such as a video session, path planning and locating of a sniper.
Owner:SHANDONG UNIV

Integrated engine brake rocker arm structure

The invention belongs to the technical field of engines, and particularly relates to an integrated engine brake rocker arm structure. A rocker arm is arranged on a rocker arm shaft, a roller is arranged at one end of the rocker arm and connected with a venting cam in a contacting manner, a brake mechanism with a one-way valve structure is arranged at the other end of the rocker arm and operates a venting gate bridge, an oil control valve mechanism is mounted on the rocker arm between the brake mechanism and the rocker arm shaft, a brake oil channel and a lubricating oil channel are formed in the rocker arm shaft, a first brake oil channel communicated with the oil control valve mechanism and a second brake oil channel communicated with the oil control valve mechanism and the brake mechanism are formed in the rocker arm, the first brake oil channel is connected or disconnected with the second brake oil channel through the oil control valve mechanism, rotation of the venting cam drives the rocker arm to swing around the rocker arm shaft, and the venting cam is matched with a solenoid valve signal to drive the oil control valve mechanism and the brake mechanism to act, so that the action of the venting gate bridge is controlled. The brake mechanism of an engine is integrally modular, simple, low in cost, convenient to mount and adjust and wide in applicability.
Owner:ZHEJIANG KANGHE MECHANICAL ENG CO LTD

Embracing electric shifting machine

ActiveCN104224478AThe overall circuit is simpleReduce noiseNursing bedsEngineeringThigh
An embracing electric shifting machine comprises a supporting leg opening and closing mechanism, a base, a vertical base, embracing arms, an electric lifting mechanism, an embracing arm opening and closing mechanism, an embracing arm locking mechanism, an electric control system, shank supporting mechanisms, a thigh supporting strap and a push handle. The vertical base is mounted on the base. The electric lifting mechanism is mounted on the inner side of the vertical base. The shank supporting mechanisms are mounted on the two sides of the vertical base. The supporting leg opening and closing mechanism is mounted under the base and comprises a left supporting leg and a right supporting leg. The embracing arm opening and closing mechanism is mounted at the upper end of the electric lifting mechanism. The embracing arms are connected to the embracing arm opening and closing mechanism. According to the embracing electric shifting machine, required functions are achieved by combining a manual mode and an electric mode; a left supporting arm and a right supporting arm on the upper portion are opened and closed by means of manual adjustment, and ascending and descending of the ends of the supporting arms are achieved in the electric mode; a left supporting frame and a right supporting frame at the bottom are opened and closed by means of electric control; a single-chip microcomputer is adopted to achieve the function of a controller, and therefore a circuit is concise overall.
Owner:国家康复辅具研究中心

Revolving shaft calibration method under binocular vision

The invention discloses a revolving shaft calibration method under binocular vision. The method comprises the following steps: placing a rotating platform into the visual fields of two cameras, and placing a calibration board on the rotating platform; detecting the angular points of the calibration board by using two cameras simultaneously, and marking an angular point which is farthest away from the center of the rotating platform as a mark point Q1; rotating the rotating platform by two angles in sequence to obtain a mark point Q2 and a mark point Q3; solving the three-dimensional coordinates of the three mark points in a world coordinate system respectively; converting the geometrical relation between the revolving shaft and a rotating platform plane into an operation relation among vectors, and solving the direction of a revolving shaft and the circle center coordinate of the rotating platform according the three-dimensional coordinates of any two mark points obtained in the step 3 in order to finish the calibration of the revolving shaft. By adopting the revolving shaft calibration method under binocular vision, the problem of low calibration efficiency due to complexity of a calibration device and the requirement of acquisition of the mark points by means of a large amount of calculation in the prior art is solved.
Owner:XIAN UNIV OF TECH

Log-periodic dipole array antenna for feeding substrate integrated waveguide

The invention relates to a wideband log-periodic dipole array antenna for feeding a substrate integrated waveguide. An upper metal coating (2) is provided with an upper assembly line (5), upper feed source element antennae (7), an upper surface (9) of the substrate integrated waveguide, a microstrip taper transition line (6) and a 50-ohm output microstrip line (8) which are sequentially connected, wherein the upper assembly line (5) is connected with the upper surface (9) of the substrate integrated waveguide, the upper feed source element antennae (7) are respectively arranged at both sides of the upper assembly line (5); a lower metal coating (3) comprises a lower surface assembly line (11) of the log-periodic dipole array antenna, lower surface feed source element antennae (12), a lower surface (13) of the substrate integrated waveguide and a ground surface (14) of a microstrip line; the lower surface assembly line (11) of the log-periodic dipole array antenna is symmetric in parallel to the upper assembly line (5) of the log-periodic dipole array antenna, the lower surface feed source element antennae (12) are symmetric in cross to the upper feed source element antennae (7); and the lower surface (13) of the substrate integrated waveguide is symmetric to the upper surface (9) of the substrate integrated waveguide and is connected with the ground surface (14) of the microstrip line.
Owner:SOUTHEAST UNIV

Integrated rocker arm used for achieving engine braking

ActiveCN104975898ARealize integrated modularityAchieve simplicityValve arrangementsMachines/enginesPistonRocker arm
The invention belongs to the technical field of engines and particularly relates to an integrated rocker arm used for achieving engine braking. The rocker arm is arranged on a rocker arm shaft. A driving mechanism driving the rocker arm to swing around the rocker arm shaft is arranged at one end of the rocker arm, and a braking mechanism is arranged at the other end of the rocker arm. The rocker arm shaft is provided with a braking oil channel and a lubricating oil channel. A braking adjusting bolt and a braking piston are communicated with the braking oil channel in the rocker arm shaft through a first braking oil channel and a second braking oil channel in the rocker arm. The braking piston is further communicated with the lubricating oil channel in the rocker arm shaft through a first lubricating oil channel in the rocker arm. The lubricating oil channel in the rocker arm shaft is further communicated with the driving mechanism through a second lubricating oil channel. The driving mechanism drives the rocker arm to swing around the rocker arm shaft and controls actions of the braking mechanism in cooperation with signals of an electromagnetic valve so as to control actions of an exhaust valve bridge or a single exhaust valve. The integrated rocker arm used for achieving engine braking does not need to be additionally provided with a complex mechanical hydraulic structure, and integration modularization, simplification and low cost of an engine braking mechanism are achieved.
Owner:ZHEJIANG KANGHE MECHANICAL ENG CO LTD

Magnetic refrigerating device based on repetitive pulsed magnetic field

The invention discloses a magnetic refrigerating device based on a pulsed magnetic field. The device comprises a repetitive pulsed power supply without a continuous loop, a pulsed magnet, a magnetic refrigeration working medium, a hot end heat exchange unit and a cold end heat exchange unit, wherein the repetitive pulsed power supply discharges to the pulsed magnet, and part of electric energy flows back to the repetitive pulsed power supply to achieve energy recovery; during the discharge process, the pulsed magnet generates the pulsed magnetic field and causes the refrigeration working medium to magnetize and release heat, and the heat generated by the magnetic working medium is transferred to a high-temperature heat source through the hot end heat exchange unit; after the discharge is finished, the repetitive pulsed power supply is shut off, and the pulsed magnet stops generating the pulsed magnetic field, and the magnetic refrigeration working medium demagnetizes and absorbs the heat, and through heat absorption of a low-temperature heat source by the cold end heat exchange unit, the temperature of the low-temperature heat source is lowered, thus completing a discharge refrigeration cycle; and the discharge refrigeration cycle is circulated in a manner above to realize continuous refrigeration. According to the scheme disclosed by the invention, the controllable pulsed magnet generates the intermittent repetitive pulsed magnetic field to achieve the magnetic refrigeration, and the magnetic refrigerating device has the characteristics of high magnetic field intensity, no moving part, convenience and fastness of control, high efficiency and high refrigeration power.
Owner:HUAZHONG UNIV OF SCI & TECH

PLC based automatic control system of robot for cleaning oil storage tank

InactiveCN101989078ARealize remote control outside the tankSecureComputer controlSimulator controlCooling towerAutomatic control
The invention relates to an automatic control system of a robot for cleaning oil sludge, sludge and the like in an oil storage tank, comprising a PLC part, a system for acquiring and displaying images in the tank, a combustible gas monitoring system, a robot walking system, an oil sludge cleaning, an oil sludge sucking control system and other parts. The automatic control system can realize the remote control outside the tank of the robot for cleaning the oil tank, has two modes of automatically cleaning the tank and manually cleaning the tank, and can be used for acquiring image information in the tank and displaying the image information, displaying the concentration of the combustible gas, realizing water jet and push shovel cleaning work, moving the robot and controlling the sucking of the oil sludge. The control system constructed by taking the PLC as the core has high automatic degree, is easy for expansion, librates workers for cleaning the tank from high-intensity work and severe dangerous environments, realizes the safety, the simpleness and reclamation for cleaning the tank and has remarkable social and economic benefits. The automatic control system can be also used for cleaning a finished product oil tank, an autoclave, a cooling tower, a storage tank and the like in the severe dangerous environment.
Owner:TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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