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59 results about "Micro/Micro" patented technology

H bridge cascade active electric filter DC side capacitance-voltage equalizing controlling maethod

This invention relates to a method for controlling capacity and voltage at the DC side uniformly of bridge-H cascade active power filter, which first of all takes the harmonic current, passive current needed to be compensated by the power net and load system as the compensation current required by the filter, takes the sum of the expected compensation current and fundamental wave positive sequence active current absorbed from the net as the APF reference current to get the APF inverter desired output voltage via a current following controller to drive the APF output current to follow the reference current, computes the micro-tune volume of the output voltage of the cascade unit, carries out micro-micro adjustment to the expected output voltage by the balance controller based on the cascade unit capacitance and voltage deviation and the APF output current to adjust the charge and discharge time of the unit floating capacitance to further realize the balance control of the floated capacitance and voltage takes the adjusted expected output voltage as the reference one of said unit to be modulated in pulse width to get trigger signals of the cascaded bridge-H power device to drive the primary circuit power device.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

MEMS micro-lens driven by three piezoelectric cantilever beams and manufacturing method thereof

The invention relates to an MEMS micro-lens driven by three piezoelectric cantilever beams and a manufacturing method thereof and belongs to the technical field of piezoelectric MEMS appliance designs and integrated manufacturing. The MEMS micro-lens comprises a micro-reflecting mirror surface, the piezoelectric cantilever beams and arched bent elastic narrow beams, wherein each of the piezoelectric cantilever beams is formed by fixing a PZT driving membrane with more than 2 mu m thickness on the surface of a silicon cantilever beam; the three piezoelectric cantilever beams are connected with the micro-lens micro-reflecting mirror surface through three arched bent elastic narrow beams respectively; and the piezoelectric cantilever beams are distributed in a way that an included angle of 120 degrees is formed between every two piezoelectric cantilever beams. The manufacturing method comprises the following steps of: firstly, preparing a piezoelectric thick membrane on a substrate and etching piezoelectric cantilever beam patterns on the piezoelectric thick membrane; secondly, preparing a Au / Cr two-layer metal top electrode and a micro micro-reflecting mirror surface pattern on the PZT piezoelectric thick membrane; and finally, etching a Si substrate on the front and back faces so as to form the MEMS micro-lens driven by the three piezoelectric cantilever beams. The MEMS micro-lens has the advantages of many deflecting directions, strong driving force of the PZT thick membrane and low optical loss. The manufacturing process is compatible with the MEMS process, so that the MEMS micro-lens has the potential of mass production and can be widely applied in the field of optical communication.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Interference management method based on interference regeneration in wireless communication system

The invention belongs to the technical field of wireless communication, and discloses an interference management method based on interference regeneration in a wireless communication system. transmitters share channel state information and data information, and the transmitter corresponding to an interfered receiver builds an interference regeneration signal according to the information; the transmitter corresponding to the interfered receiver sends the interference regeneration signal, the interfered receiver performs matching and filtering on a mixed signal formed by interference and the interference regeneration signal, and expected data is regenerated from the interference. The method has the advantages that the interference is converted into the expected signal, and the spectrum efficiency of the interfered receiver is improved by using the interference energy, and can be used for solving the interference problem in wireless communication; an IRC signal used for regenerating the interference is built at a micro-micro base station PBS by using a relative expression relationship between data symbols, and the expected signal of PUE is regenerated from the interference after filtering by using the mutual effect between wireless signals.
Owner:XIDIAN UNIV

Microwave low-waveband submicron microstrip duplexer

The invention discloses a microwave low-band ultra-micro micro-strip diplexer. A circuit composition of the microwave low-band ultra-micro micro-strip diplexer comprises three micro-strip band-pass filters and two 3dB quadrature bridges, one end of a first filter is connected with an input/output interface of a first bridge, the pass-band frequency of the first filter is different from those of a second filter and a third filter, the pass-band frequencies of the second filter and the third filter are same, and the second filter and the third filter are parallelly connected between coupling ends and straight-through ends of the first bridge and a second bridge. The micro-strip diplexer is formed by the micro-strip band-pass filters with good selectivity and the 3dB quadrature bridges with functions of signal decomposition, synthesis and reflection. The micro-strip diplexer has good input/output standing wave ratio, circuits are easy to be in cascade connection with pre-stage and post-stage circuits, ultra-fine micro-strip thin-film technology is adopted, and the circuits have good consistency, compact structure and small volume, thereby ensuring that the microwave low-band ultra-micro micro-strip diplexer has high selectivity and high integration level and is widely applied to the technical field of communication.
Owner:SHENZHEN GRENTECH CO LTD +1

Method for implementing permanent call and blue-tooth handset call diversion

The invention discloses a call transfer method for the telephone to call the Bluetooth earphone, the method includes following steps: the gateway receives the application information that the honeycomb telephone applies to join in the micro-micro network, and the honeycomb telephone informs the gateway its number; the gateway adds the honeycomb telephone into the terminal list and registers the telephone to the mount telephone network; when the mount telephone calls the honeycomb telephone, the mounting telephone knows the mobile phone has jointed the gateway according to the registered information, and the mount telephone calls the gateway; the gateway informs the terminal to ring the bell; the gateway uses HCI 'Read_RSSI' commands defined in the Bluetooth standard to read the signal intensity instructing value, when the value is lower that the preset threshold, or the gateway uses standard HCI commands 'Get_Link_Quality' to acquire a link quality information with one type, and the value is lower than the preset threshold, or the gateway telephone judges if there has chain break even of the honeycomb telephone in the HCI event, the gateway considers that the honeycomb telephone leaves the micro-micro network of the gateway; the gateway sends information to mount telephone network to cancel the call transfer registered by the honeycomb telephone. When the honeycomb telephone and gateway have the functions, the call is transmitted through the mount telephone network, not through the mobile network, thus the user needn't to endure the interference and fading of signal, the conversation quality can upgraded. And it uses the honeycomb telephone to receive the call, reduces the charge of using mount telephone to receive the call, so it is free.
Owner:IVT TECH BEIJING

System, method and relevant device for determining usable frequency of micro-micro base station and relevant device

ActiveCN101754224ASolve the problem of not being able to determine the frequency available for pico base stationsNetwork planningMicro/MicroNetwork addressing
The invention discloses a system and a method for determining usable frequency of a micro-micro base station and a relevant device, which aims to solve the problem that the usable frequency can not be determined when the micro-micro base station is in a roaming state. The system comprises a micro-micro base station; a first micro-micro gateway in a hometown network subordinate to the micro-micro base station and a second micro-micro gateway at a visiting place of the micro-micro base station, wherein the micro-micro base station is used for obtaining a network address distributed to the micro-micro base station and transmitting authentication information containing the network address distributed to the micro-micro base station to the first micro-micro gateway according to the stored network address of the first micro-micro gateway; the first micro-micro gateway is used for determining the second micro-micro gateway visited by the micro-micro base station at present according to the network address contained in the authentication information when the roaming state of the micro-micro base station is determined, requesting the usable frequency at the visiting place to the second micro-micro gateway and transmitting the requested usable frequency to the micro-micro base station; and the second micro-micro gateway is used for transmitting the usable frequency at the visiting place to the first micro-micro gateway.
Owner:CHINA MOBILE COMM GRP CO LTD

Portable miniature micro-curved-surface suction-cup-type fixing base

The invention discloses a portable miniature micro-curved suction cup type fixing seat, which comprises a suction cup adsorption mechanism, an electromagnet locking mechanism, an air pressure detection and stabilizing device and a fixing and guiding mechanism. Threads are processed on the inner side of the shell on the fixing seat, so that the micro repair equipment can be fixed on the fixing seat. The suction cup in the suction cup adsorption mechanism is composed of a suction cup and a universal joint. When the skin is a curved surface, the universal joint rotates to ensure the complete fit of the suction cup and the curved surface. After the suction cup is adsorbed on the skin, the air pressure and the detection device Working, it can detect whether the air pressure in the shell reaches the design value. The air pressure detection and stabilization device is installed at the vent hole. When the solenoid valve is not energized, the air circuit is normally open. When working, if the air pressure in the shell is lower than the design value, the air in the shell is drawn out of the shell. When the air pressure in the shell reaches When the set value is set, the solenoid valve is energized, the air circuit remains normally closed, and the solenoid locking mechanism works. When the electromagnet locking mechanism is working, the electromagnet is energized to generate magnetism, which attracts the magnet on the lever, thereby driving the lever to rotate, and the clamping block tightens the support rod. After the work of the sucker-type fixing seat is completed, the electromagnet is powered off, the solenoid valve is powered on, the gas enters the shell cavity through the solenoid valve, and the support rod is reset to complete a working cycle. The beneficial effect of the invention is that a portable micro-curved surface fixing base is provided for the miniature restoration equipment, and the restoration accuracy of the miniature restoration equipment is improved.
Owner:UNIV OF JINAN

Stator embedded electromanetic suspension rotor micro motor

The utility model relates to a stator-embedded electromagnetic levitation rotor micro-motor, which belongs to the technical field of micro-electro-mechanical systems. In the present invention, both the upper stator and the lower stator are arranged on the intermediate base, and form a fixed connection with the intermediate base, the box-shaped micro-rotor is in the shape of a hollow circular box, and the box-shaped micro-rotor is under the electromagnetic force of the upper stator and the lower stator It is stably suspended on the outer edge of the intermediate base. There are eight rotating coils distributed on the intermediate base. They are divided into two groups of four-phase coils. When high-frequency alternating current passes through the rotating coils, the current phase difference of adjacent coils is 90 degrees, so that , A rotating magnetic field is formed in the space where the box-shaped micro-rotor is located, and the box-shaped micro-rotor generates a rotating torque under the action of the rotating magnetic field to make it rotate at a high speed. The present invention adopts a box-shaped micro-rotor and a built-in stator structure, which can increase the suspension stiffness and lateral stability stiffness of the suspended micro-rotor, and at the same time, the intermediate base can limit the position of the micro-rotor when the box-shaped micro-rotor is not working .
Owner:SHANGHAI JIAOTONG UNIV

A flexible multi-joint surgical microinstrument for robot-assisted minimally invasive surgery

A flexible multi-joint surgical micro-instrument for robot-assisted minimally invasive surgery, in order to solve the problem that the existing minimally invasive surgical robot surgery micro-instrument cannot be positioned, moved and other operations in the patient's body relying on the surgical micro-instrument itself. The transmission mechanism is installed on the drive box, and the six connection holes correspond to the first installation hole, the second installation hole, the third installation hole, the fourth installation hole, the fifth installation hole and the sixth installation hole respectively. A transmission part is installed in the hole, and the first bending transmission mechanism, the second bending transmission mechanism, the third bending transmission mechanism, the fourth bending transmission mechanism, the surgical forceps opening and closing transmission mechanism and the surgical forceps rotation transmission mechanism are respectively connected with the corresponding transmission parts , the lower end of each transmission part is connected with the micro-drive motor, the rear end of the catheter is connected with the catheter fixing part, the front end of the catheter is connected with the flexible bending arm mechanism, and the front end of the flexible bending arm mechanism is connected with the surgical forceps mechanism. The invention is used for abdominal surgery.
Owner:吉林省金博弘智能科技有限责任公司

Intelligent full-automatic micro-drawing machine

The invention relates to an intelligent full-automatic micro-drawing machine, which includes a chassis, a wire mechanism, an oil supply mechanism, a wire inlet mechanism, a micro-pull mechanism, an outlet mechanism and a driving mechanism; the wire mechanism includes a guide plate and a guide groove, and the copper wire is arranged on the In the guide groove; the wire inlet mechanism is arranged on one side of the cabinet along the width direction, and the wire outlet mechanism is arranged on the other side of the cabinet along the width direction. The micro-pull mechanism includes a micro-pull unit and a micro-pull control unit. The first micro-pull unit and the second micro-pull unit, the micro-pull control unit includes a level sensor, a speed detection module, a judgment module, a feedback module and a control module; the driving mechanism is arranged in the chassis for driving the micro-pull The main shaft of the mechanism rotates. The invention has good reliability and high intelligence, and can monitor the running speed of the copper wire in each micro-drawing unit in real time, so as to ensure the uniform running of the copper wire, ensure the uniform micro-drawing of the copper wire, and finally ensure the high micro-drawing of the copper wire. quality.
Owner:SUZHOU JIN JU SONG MECHANICAL & ELECTRICAL CO LTD

A tumor interventional therapy device

The present invention relates to the technical field of medical devices, in particular to a device for interventional treatment of tumors, which includes a needle handle and a needle body, a support platform is arranged on the top of the needle body, and a miniature air cylinder is arranged on the left side of the bottom surface of the support platform. The cylinder shaft of the cylinder passes through the left side of the support platform, and a cylinder shaft perforation is arranged at the shaft end of the cylinder shaft; a micro motor is arranged on the right side of the bottom surface of the support platform, and the micro motor drives the micro cylinder to move; the support platform The right side is provided with an inner cavity, and the inner cavity is provided with a miniature battery pack, which is connected to the micro motor and the miniature cylinder through a wire; a transverse perforation is set on the needle handle, and the transverse perforation is connected to the cylinder shaft on the cylinder shaft. The shaft perforation is on the same level; a pin is inserted into the cylinder shaft perforation at the shaft end of the cylinder shaft, and the pin is inserted through the transverse perforation on the needle handle; it has the advantages of simple structure, convenient operation, high degree of automation, and great The work efficiency is greatly improved, and the life safety of the staff is ensured.
Owner:SHANDONG RES INST OF TUMOUR PREVENTION TREATMENT
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