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1702results about How to "Simple control" patented technology

Flexible direct current transmission converter valve steady-state high-power running testing device and testing method

ActiveCN103033701ARealize power loop steady-state performance testMeet the requirements for concurrent testingElectrical testingElectrical resistance and conductanceRectifier diodes
The invention relates to a flexible direct current transmission converter valve steady-state high-power running testing device and a testing method. The testing device comprises an isolation transformer (TR1), a rectifier bridge (REC1) and a converter valve group. An alternating current input end of the rectifier bridge is connected with the isolation transformer. A direct current output end of the rectifier bridge is connected with the converter valve group. The testing device further comprises a BUCK-BOOST circuit which comprises an insulated gate bipolar translator (IGBT) module formed by an IGBT and an antiparallel diode, a resistor (R), a direct current bus support capacitor (C1) and a load electric reactor (L1). The resistor (R) and the IGBT module are connected in series and then connected with a direct current output end of rectifier bridge (REC1) in parallel. The direct current bus support capacitor (C1) is connected with two ends of a series branch circuit of the resistor (R) and the IGBT module in parallel and is connected with the converter valve group through the load electric reactor (L1). Through construction of a test platform which accords with the actual steady-state operation condition, the flexible direct current transmission converter valve steady-state high-power running testing device carries out steady-state power operation tests of a converter valve, carries out detection to current, voltage and temperature rising of components, and checks the correctness of design of the converter valve.
Owner:XJ ELECTRIC +1

Intelligent gesture and voice control system of curtain and control method thereof

The invention discloses an intelligent gesture and voice control system of a curtain and a control method thereof. The control system comprises a gesture collection unit, a voice collection unit, an identifying unit and an external equipment unit, wherein the gesture collection unit is used for obtaining a gesture movement of a user through a camera; the voice collection unit is used for obtaining a user instruction through a microphone; and after the identifying unit is used for respectively identifying and judging a gesture and a voice, information of two channels is integrated according to a time sequence relation of an identified information flow. The curtain can be operated according to an integrated result. According to the intelligent gesture and voice control system of the curtain and the control method thereof, gesture control and voice control can be independently used and also can be used in a combined manner, so that a user has more natural and harmonious experiences in intelligent home furnishing. The gesture and the voice are combined to control the curtain at the same time so that the problem caused by manually opening and closing the curtain in the existing family is reduced and the quantity of remote controllers in the family is reduced; and meanwhile, elderly people and children in the family, and disabilities can conveniently use the curtain.
Owner:SOUTH CHINA UNIV OF TECH

Device for detecting comprehensive performance of ball screw assembly in loaded state

InactiveCN103389205ARealize detectionReal-time detection of the number of rotationsMachine gearing/transmission testingCouplingBall screw
A device for detecting comprehensive performance of a ball screw assembly in a loaded state comprises a testboard machine body fixed on a cast iron platform, wherein a servomotor is arranged at one end of the testboard machine body; the output shaft of the servomotor is connected to one end of the ball screw assembly through a first coupler, a dynamic torque sensor and a second coupler; an eddy current sensor and a rotary encoder are arranged at the other end of the testboard machine body; a grating scale and an infrared temperature sensor are arranged on the testboard machine body; a rolling guide rail is arranged on the testboard machine body, and is provided with an analog working table; the analog working table is connected to the rolling guide rail through a rolling guide rail slide block, and is connected to a loading device; a ball screw assembly nut is arranged on the analog working table through a nut support base. The device is stable in properties, quick in movement and testing response speed, comprehensive and accurate in testing performance parameters, and simple in structure, and can realize the comprehensive performance detection of ball screw assemblies with different models in no-loaded states or loaded states.
Owner:XI AN JIAOTONG UNIV

Dual-capacitor module based MMC type multi-port power electronic transformer

The invention discloses a dual-capacitor module based MMC type multi-port power electronic transformer. The transformer comprises a modular multilevel converter (MMC), a DC/DC converter and an inverter, wherein the MMC has two sub modules; the DC/DC converter comprises a primary part, a high frequency voltage transformation part and a secondary part, wherein the primary part has four kinds of selective topologies. The transformer can be operated on the high voltage direct current side at a low voltage; the transformer has fault ride-through capability, and relatively less devices are used; the module in the MMC and the DC/DC converter are responsible for direct current voltage control and power control respectively; a single capacitor voltage of the module can be controlled independently, or two capacitor voltages of the module can be controlled simultaneously; the transformer is equipped with the four ports, including a high voltage direct current port, a high voltage alternating current port, a low voltage direct current port and a low voltage alternating current port, so that the transformer is suitable for multi-kind high-voltage high-power occasions of multiple voltage levels, and particularly suitable for the energy internet; for example, the transformer can be used as an energy router, and the like.
Owner:SOUTHEAST UNIV

LC series resonance high frequency chain matrix-type inverter topology and resonance modulation method thereof

The present invention provides a LC series resonance high frequency chain matrix-type inverter topology and a resonance modulation method thereof. The topology comprises of a full bridge LC series resonance inverter, a high-frequency transformer T, a matrix converter and a CL-type filter which are connected in order. The modulation method is configured to process the SPWM wave through separation and link semi-excitation modulation logics to obtain driving signals of a transformer pre-stage LC series resonance inverter and a transformer post-stage matrix converter so as to allow the work duty ratio of the transformer pre-stage resonance circuit excitation resonance work state in the resonance half period to be controllable and realize the control of energy side transmission to the output load. The transformer post-stage matrix converter is modulated and decoupled to two common current-type inverters for controlling, a switch tube performs switching during the zero current outputting to realize zero current switching to avoid causing voltage overshoot problems and realize energy bidirectional flow and four-quadrant operation. The power transformation grades are few, the control method is simple, the circuit stability is high, and the like.
Owner:YANSHAN UNIV

Power-interrupting-free shifting speed changing box of electric vehicle and shifting control method of power-interrupting-free shifting speed changing box

The invention discloses a power-interrupting-free shifting speed changing box of an electric vehicle and a shifting control method of the power-interrupting-free shifting speed changing box. The speed changing box comprises a first gear pair mechanism, a second gear pair mechanism, a disc clutch and a shifting control mechanism, in the shifting control mechanism, a first gear overrunning clutch and a control overrunning clutch are mounted in corresponding gears, a control friction plate is fixed on a roller retainer and a roller shifting fork of the first gear overrunning clutch, a wave spring is mounted in an annular groove in an end surface of a second control gear, and a control pressure plate is axially pre-tightened through the wave spring, is clamped in the annular groove in the end surface of the second control gear and rotates along with the second control gear. By the shifting control method of the speed changing box, first gear engaging, second gear engaging and gear reversing actions can be realized and do not intervene. By the power-interrupting-free shifting speed changing box of the electric vehicle, the problem of interrupting of shifting power of the traditional AMT is solved, and a smooth speed ratio switching process can be realized. In addition, by the structure, a shifting fork and a shifting fork shaft are further omitted, the system structure is greatly simplified, and the total weight of a transmission is reduced.
Owner:青岛莱吉传动系统科技有限公司

Object-loading robot which can move as well as climb stairs

The invention relates to the technical field of robots, in particular to an object-loading robot which can move as well as climb stairs. The problems in the prior art that a stair-climbing and object-loading robot is complicated in structure and low in cost performance and it is hard to popularize the robot are solved. The object-loading robot comprises a supporting frame, caterpillar band drive mechanisms, a wheel caterpillar mode switch mechanism, an object-loading platform posture adjusting mechanism, driving hub motors, universal wheels and a control unit, the caterpillar band drive mechanisms, the wheel caterpillar mode switch mechanism, the object-loading platform posture adjusting mechanism, the driving hub motors, the universal wheels and the control unit are arranged on the supporting frame, through the wheel caterpillar mode switch mechanism, wheel caterpillar switching can be conducted aiming at the flat movement state or the stair climbing state, and thus the multiple movement modes of the robot are achieved. The object-loading robot is low in cost, small in size, and light in weight; the robot is flexibly switched between the flat movement mode and the stair climbing mode, and is more suitable for serving as a portable auxiliary object-loading robot, the control method is simple, and thus the object-loading robot is convenient to popularize.
Owner:ZHONGBEI UNIV

Controlling method and device for intelligent device

The invention discloses a controlling method and device for an intelligent device, and belongs to the technical field of terminals. The controlling method comprises the following steps: when first gesture motion is detected, preparing for switching of controlling relation; when second gesture motion is detected, determining a targeted controlled device; building the controlling relation with the targeted controlled device; acquiring third gesture motion; controlling the targeted controlled device to execute operation corresponding to the third gesture motion. According to the invention, after the switch of the controlling relation is prepared through the first gesture motion, and the targeted controlled device is determined according to the second gesture motion, and the controlling relation with the targeted controlled device is built; the third gesture motion is further acquired; the targeted controlled device is controlled to execute the operation corresponding to the third gesture motion; the targeted controlled device is controlled; as the controlling relation can be switched to the targeted controlled device through the gesture motion, and control of the targeted controlled device can be fulfilled through the gesture motion, the controlling manner is simpler; the flexibility of the controlling manner is improved at the same time.
Owner:XIAOMI INC

Waveform control method of digital oscilloscope

The invention discloses a waveform control method of a digital oscilloscope, comprising the following steps of: enabling the horizontal direction of a touch screen to correspond to a time shaft of an input signal and the vertical direction of the touch screen to correspond to an amplitude shaft of the input signal; dividing a passage position regulation area, a triggering level regulation area and a triggering time regulation area on the relative position of a screen within a screen area according to a passage position indicator, a triggering time indicator and a triggering level indicator of the digital oscilloscope, determining a waveform scaling regulation area by taking a waveform display area as a center; then determining the CPU (Central Processing Unit) of the digital oscilloscope to execute the following operation according to an area of the touch position of a user: executing current passage switching or moving a waveform along the vertical direction when the passage position regulation area is touched, executing current triggering passage switching or regulating a triggering level when the triggering level regulation area is touched, and moving the waveform along the horizontal direction when the triggering time regulation area is touched. The invention has the advantage that the user can intuitively control various user interface objects already displayed on the screen.
Owner:郑州麦科信电子技术有限公司

Somatosensory control method for upper limb rehabilitation robot and rehabilitation training strategy

The invention discloses a somatosensory control method for an upper limb rehabilitation robot and a rehabilitation training strategy. Kinect is used for collecting upper limb motion data, an upper computer is used for processing the motion data and obtaining a control signal, and a lower computer is used for transmitting the control signal to a servo driver to drive a wearable exoskeleton mechanical arm to drive injured limbs to carry out rehabilitation training. The rehabilitation training strategy includes bilateral limb mirror image synchronized rehabilitation training under the mirror image somatosensory control, master-slave rehabilitation training under the synchronized somatosensory control and semi-active rehabilitation training. Body movement somatosensory control is adopted, the control mode is more intuitive and natural and simpler, multi-joint real-time coordinated control can be carried out, and training of complex motions is convenient to achieve; a somatosensory master-slave real-time control mode is convenient for physical therapists to adjust rehabilitation training plans in real time; patients can drive the injured limbs to carry out healthy limb and injured limb bilateral coordination synchronized mirror image motions through own healthy limb motions, repairing of the cerebral neurons is more conveniently promoted, and the therapeutic effect of a mirror image therapy on the whole injured limbs is improved.
Owner:南通大学技术转移中心有限公司

Ground fault current compensation system and method for self-produced power supply phase power supply

The invention discloses a ground fault current compensation system and method for a self-produced power supply phase power supply. The system comprises a phase power supply generator, a phase power supply phase compensator, a fling-cut switch, a controller and a voltage transformation device. An output end of a phase compensator of a power supply is connected to a system neutral point through thefling-cut switch. The system can passively generate power distribution network power supply phase power supply and harmonic phase power supply and input anti-phase power supply phase power supply andthe harmonic phase power supply into the system according to fault logic. The complete compensation of power distribution network grounding fault reactive current, harmonic current and active currentis achieved, the defect that compensation is incomplete by adopting a power electronic device inversion injection method after electricity is taken from a bus system is overcome, and the problems thatan active inversion method has a poor metallic grounding compensation effect and a traditional arc suppression coil cannot achieve full compensation are solved. The system is efficient and accurate and can completely compensate overvoltage and overcurrent generated by a grounding fault, the safety of a power grid and equipment is guaranteed, and the risk of electric shock of a human body is completely avoided.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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