Patents by Inventor Weihua Chen
Weihua Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8907437Abstract: A current sensor packaged in an integrated circuit package to include a magnetic field sensing circuit, a current conductor and an insulator that meets the safety isolation requirements for reinforced insulation under the UL 60950-1 Standard is presented. The insulator is provided as an insulation structure having at least two layers of thin sheet material. The insulation structure is dimensioned so that plastic material forming a molded plastic body of the package provides a reinforced insulation. According to one embodiment, the insulation structure has two layers of insulating tape. Each insulating tape layer includes a polyimide film and adhesive. The insulation structure and the molded plastic body can be constructed to achieve at least a 500 VRMS working voltage rating.Type: GrantFiled: July 22, 2011Date of Patent: December 9, 2014Assignee: Allegro Microsystems, LLCInventors: Shaun D. Milano, Weihua Chen
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Publication number: 20140304180Abstract: A method and system for dividing a user's social network relationship circle is disclosed. The method includes generating relevancy attribute information between friends of a first user according to social information of the first user's friends. A level of closeness between the friends according to the relevancy attribute information is acquired. The friends with the level of closeness greater than a first threshold are associated with a same relationship circle of the first user. The above method divides the friends of the user who have a high degree of closeness to the same relationship circle automatically. Thus, the efficiency of managing the social network for users is improved.Type: ApplicationFiled: April 4, 2014Publication date: October 9, 2014Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Peng He, Yuewen Liu, Yuhuang Li, Junming Mai, Chuan Chen, Weihua Chen
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Publication number: 20140222925Abstract: The current application describes adding a friend in a social network. A friend adding request corresponding to a first user identification is obtained. Further, a second user identification is obtained according to the friend adding request. The invention then obtains a group that includes the first user identification and the second user identification. A verification request is generated according to information corresponding to the first user identification and sent to a terminal corresponding to the second user identification. After a friend adding confirmation request corresponding to the second user identification is obtained, the second user identification is added to a friend list corresponding to the first user identification. The current application also describes a device and a storage medium for adding a friend in a social network. The invention of the current application improves the operation convenience of adding a friend.Type: ApplicationFiled: April 4, 2014Publication date: August 7, 2014Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Junming Mai, Yuhuang Li, Yuewen Liu, Peng He, Chuan Chen, Weihua Chen
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Publication number: 20140214824Abstract: Provided is a method, device and computer storage medium for adding information of friends, and said method includes following steps: acquiring a user ID of a user and a friend ID of a friend of the user from a first network relationship list; according to said user ID and said friend ID, acquiring second correlation information corresponding to said user and said friend from several second network relationship lists; according to said second correlation information, determining first correlation information corresponding to the user and the friend in said first network relationship list, and adding said first correlation information into said first network relationship list. The method and device for adding information of friends provided in the present disclosure can accurately recognize the correlation information corresponding to the user and the friend on the basis of existing network relationship lists, and automatically add remark information for friends of the user.Type: ApplicationFiled: March 26, 2013Publication date: July 31, 2014Inventors: Junming Mai, Yuhuang Li, Yuewen Liu, Peng He, Chuan Chen, Weihua Chen
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Patent number: 8738839Abstract: The invention discloses a method for storing data and a device of implementing the same. The method comprises receiving a request for storing data sent by a user and storing the data to an SSD according to the received request. The device comprises a request receiving module used to receive the request storing data and an SSD storage module used to store the data to an SSD according to the received request. The invention ensures consistency of data storage by storing data to an SSD according to the received request, thereby reducing data redundancy caused by using a cache layer to cache the data in the prior art. Additionally, the use of a single layer of an SSD to store data avoids the need of reloading data in the cache layer once a machine is power-down, thereby reducing the complexity of system design and the cost of operation and maintenance.Type: GrantFiled: November 14, 2012Date of Patent: May 27, 2014Assignee: Tencent Technology (Shenzhen) Company LimitedInventors: Ming Tian, Jun Shu, Weihua Chen, Sihua Zhuang, Huan Xiong
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Publication number: 20140004525Abstract: A dinuclear zinc complex PPi sensor is provided, that may be represented by the formula where X is hydrogen, —COOEt, —CH?CH2, —OR, or —NR2, wherein X is a monovalent organic group having from 1 to about 20 carbon atoms. A method of preparing the dinuclear zinc complex PPi sensor is also provided. Methods for detecting PPi in an aqueous solution and methods for pyrosequencing by using the dinuclear zinc complex are described.Type: ApplicationFiled: February 16, 2012Publication date: January 2, 2014Applicant: The University of AkronInventors: Yi Pang, Weihua Chen
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Patent number: 8542011Abstract: A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.Type: GrantFiled: April 2, 2013Date of Patent: September 24, 2013Assignee: Allegro Microsystems, LLCInventors: Weihua Chen, Michael G. Ward
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Patent number: 8451002Abstract: A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.Type: GrantFiled: September 14, 2012Date of Patent: May 28, 2013Assignee: Allegro Microsystems, LLCInventors: Weihua Chen, Michael G. Ward
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Publication number: 20130073782Abstract: The invention discloses a method for storing data and a device of implementing the same. The method comprises receiving a request for storing data sent by a user and storing the data to an SSD according to the received request. The device comprises a request receiving module used to receive the request storing data and an SSD storage module used to store the data to an SSD according to the received request. The invention ensures consistency of data storage by storing data to an SSD according to the received request, thereby reducing data redundancy caused by using a cache layer to cache the data in the prior art. Additionally, the use of a single layer of an SSD to store data avoids the need of reloading data in the cache layer once a machine is power-down, thereby reducing the complexity of system design and the cost of operation and maintenance.Type: ApplicationFiled: November 14, 2012Publication date: March 21, 2013Inventors: Ming TIAN, Jun SHU, Weihua CHEN, Sihua ZHUANG, Huan XIONG
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Publication number: 20130031221Abstract: A distributed data storage system and method are disclosed. The distributed data storage system includes: an interface machine process module; at least one service process module; and at least one storage module. The interface machine process module is configured to receive a storage request containing data to be stored from a storage requester and distribute the storage request to one of the at least one service process module; the service process module is configured to receive the storage request from the interface machine process module and assign a storage identifier for the date contained in the storage request; the at least one storage module is configured to store the data according to the storage identifier assigned by the service process module. The distributed data storage system and method of the present invention can provide stable, simple, highly efficient, and low cost mass data storage and read/write services for users.Type: ApplicationFiled: October 1, 2012Publication date: January 31, 2013Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Ming Tian, Jun Shu, Weihua Chen, Sihua Zhuang, Huan Xiong
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Publication number: 20130020660Abstract: A current sensor packaged in an integrated circuit package to include a magnetic field sensing circuit, a current conductor and an insulator that meets the safety isolation requirements for reinforced insulation under the UL 60950-1 Standard is presented. The insulator is provided as an insulation structure having at least two layers of thin sheet material. The insulation structure is dimensioned so that plastic material forming a molded plastic body of the package provides a reinforced insulation. According to one embodiment, the insulation structure has two layers of insulating tape. Each insulating tape layer includes a polyimide film and adhesive. The insulation structure and the molded plastic body can be constructed to achieve at least a 500 VRMS working voltage rating.Type: ApplicationFiled: July 22, 2011Publication date: January 24, 2013Applicant: Allegro Microsystems, Inc.Inventors: Shaun D. Milano, Weihua Chen
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Publication number: 20130009638Abstract: A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: ALLEGRO MICROSYSTEMS, INC.Inventors: Weihua Chen, Michael G. Ward
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Patent number: 8339134Abstract: A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.Type: GrantFiled: October 8, 2010Date of Patent: December 25, 2012Assignee: Allegro Microsystems, Inc.Inventors: Weihua Chen, Michael G. Ward
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Patent number: 8258777Abstract: The present invention relates to an inductive proximity sensor that includes an oscillator having first and second inductor-capacitor circuits arranged such that an inductance of one of the inductor-capacitor circuits has substantially greater sensitivity to an external target than an inductance of the other inductor-capacitor circuit. The sensor also includes an alternating current drive to each of the inductor-capacitor circuits that is in-phase and depends on differences in voltage across the inductor-capacitor circuits. The sensor may be coupled to a calibration device that applies power and triggers a calibration routine within the sensor. In response to the trigger signal, a calibration processor within the sensor executes the calibration routine and adjusts the inductor-capacitor circuits and provides an indication of successful calibration.Type: GrantFiled: September 4, 2009Date of Patent: September 4, 2012Inventor: Weihua Chen
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Patent number: 8188730Abstract: An inductive proximity sensor and related method for sensing a presence/position of a target, with mounting effect compensation, are disclosed. In at least one embodiment, the method includes providing a proximity sensor having first and second coils that are both at least indirectly in communication with control circuitry. The method also includes receiving respective first and second signals at least indirectly indicative of respective first and second electromagnetic field components respectively experienced by the first coil as influenced both by a target and a structure supporting the sensor and the second coil as influenced by the supporting structure. The method further includes determining by way of the circuitry a third signal based at least in part upon the first signal, as modified based at least in part upon the second signal, whereby the third signal is indicative of the presence or position of the target relative to the sensor.Type: GrantFiled: September 10, 2008Date of Patent: May 29, 2012Assignee: Rockwell Automation Technologies, Inc.Inventors: Xiaofeng Gong, Wei S. Qian, Weihua Chen
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Publication number: 20120086444Abstract: A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.Type: ApplicationFiled: October 8, 2010Publication date: April 12, 2012Applicant: ALLEGRO MICROSYSTEMS, INCInventors: Weihua Chen, Michael G. Ward
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Patent number: 7994777Abstract: An inductive proximity sensor is disclosed. The proximity sensor includes a housing having at least a first pair of inductive coils disposed within the housing. One of the first pair of inductive coils is opposite in polarity from another one of the first pair of inductive coils. The sensor optionally includes a second set of inductive coils, having opposite polarity.Type: GrantFiled: September 28, 2007Date of Patent: August 9, 2011Assignee: Rockwell Automation Technologies, Inc.Inventors: George E. Rollins, Weihua Chen, Prachi S. Kulkarni, Diana A. Sufariu
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Publication number: 20110057668Abstract: The present invention relates to an inductive proximity sensor that includes an oscillator having first and second inductor-capacitor circuits arranged such that an inductance of one of the inductor-capacitor circuits has substantially greater sensitivity to an external target than an inductance of the other inductor-capacitor circuit. The sensor also includes an alternating current drive to each of the inductor-capacitor circuits that is in-phase and depends on differences in voltage across the inductor-capacitor circuits. The sensor may be coupled to a calibration device that applies power and triggers a calibration routine within the sensor. In response to the trigger signal, a calibration processor within the sensor executes the calibration routine and adjusts the inductor-capacitor circuits and provides an indication of successful calibration.Type: ApplicationFiled: September 4, 2009Publication date: March 10, 2011Inventor: Weihua Chen
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Patent number: 7821350Abstract: A phase-locked loop employing a plurality of oscillator complexes is disclosed. The phase-locked loop includes a clock output and a plurality of oscillator complexes operable to generate output signals. The phase-locked loop further includes control logic which is configured to selectively couple an output signal of one of the plurality of oscillator complexes to the clock output.Type: GrantFiled: January 19, 2007Date of Patent: October 26, 2010Assignee: QUALCOMM IncorporatedInventors: Liang Dai, Brandon Wayne Lewis, Jeffrey Todd Bridges, Weihua Chen
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Publication number: 20100060270Abstract: An inductive proximity sensor and related method for sensing a presence/position of a target, with mounting effect compensation, are disclosed. In at least one embodiment, the method includes providing a proximity sensor having first and second coils that are both at least indirectly in communication with control circuitry. The method also includes receiving respective first and second signals at least indirectly indicative of respective first and second electromagnetic field components respectively experienced by the first coil as influenced both by a target and a structure supporting the sensor and the second coil as influenced by the supporting structure. The method further includes determining by way of the circuitry a third signal based at least in part upon the first signal, as modified based at least in part upon the second signal, whereby the third signal is indicative of the presence or position of the target relative to the sensor.Type: ApplicationFiled: September 10, 2008Publication date: March 11, 2010Inventors: Xiaofeng Gong, Wei Qian, Weihua Chen