Patents by Inventor Guoqiang Liu
Guoqiang Liu 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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Publication number: 20210194373Abstract: A control method of a switching circuit, a control circuit of the switching circuit, and the switching circuit are provided. The switching circuit includes an inductor or a transformer. An operational amplification is performed on an output feedback voltage and a first reference voltage of the switching circuit to obtain a compensation voltage. The compensation voltage controls an on-time of a main switch of the switching circuit. When the current of the inductor or the transformer drops to a threshold, after a time, the main switch is switched from off to on, and the output feedback voltage controls the time. When the output feedback voltage is higher than a first threshold voltage, the compensation voltage is pulled down. When the output feedback voltage is lower than a second threshold voltage, the compensation voltage is pulled up.Type: ApplicationFiled: November 11, 2020Publication date: June 24, 2021Applicant: JOULWATT TECHNOLOGY (HANGZHOU) CO. LTD.Inventors: Minghao WU, Guoqiang Liu, Xunwei ZHOU
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Patent number: 10818003Abstract: A high-precision intelligent detection method for bridge diseases based on spatial position. The method comprising: collecting images based on the high-definition image acquisition system; importing the image data and position information data into image processing software to create a mosaic image of each part of the bridge; importing the prepared spliced image map into the bridge disease intelligent identification system; obtaining the corresponding position and bridge of the bridge disease in the three-dimensional model of the bridge; identifying the stitched image map to obtain the size of the disease after identifying the bridge disease image and locating the bridge disease. The high-precision intelligent detection method for bridge diseases based on spatial position realizes automatic collection and intelligent analysis of bridge inspection data, reduces the workload of the inspection technicians and improves the detection efficiency.Type: GrantFiled: October 10, 2018Date of Patent: October 27, 2020Assignee: Chongqing Construction Engineering Group Corporation LimitedInventors: Bo Chen, Yifei Wu, Guoqiang Liu, Xiaoni Zeng, Xiaojun Deng, Zongyong Chen, Lin Qiu
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Publication number: 20200098103Abstract: A high-precision intelligent detection method for bridge diseases based on spatial position. The method comprising: collecting images based on the high-definition image acquisition system; importing the image data and position information data into image processing software to create a mosaic image of each part of the bridge; importing the prepared spliced image map into the bridge disease intelligent identification system; obtaining the corresponding position and bridge of the bridge disease in the three-dimensional model of the bridge; identifying the stitched image map to obtain the size of the disease after identifying the bridge disease image and locating the bridge disease. The high-precision intelligent detection method for bridge diseases based on spatial position realizes automatic collection and intelligent analysis of bridge inspection data, reduces the workload of the inspection technicians and improves the detection efficiency.Type: ApplicationFiled: October 10, 2018Publication date: March 26, 2020Applicant: Chongqing Construction Engineering Group Corporation LimitedInventors: Bo Chen, Yifei Wu, Guoqiang Liu, Xiaoni Zeng, Xiaojun Deng, Zongyong Chen, Lin Qiu
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Patent number: 10506684Abstract: A protection circuit and an illumination driving circuit are described herein. The protection circuit comprises a detection circuit, detecting a current flowing through a first switch to obtain a current detection signal and determining whether there is leakage at an input terminal according to the current detection signal; a control circuit, controlling the first switch to switch on intermittently, detecting the current flowing through the first switch by the detection circuit during a switch-on period of the first switch, and keeping the load at a disconnection state if the detection circuit determines there is leakage; and the first switch, connected to the input terminal, and a control terminal of the first switch being connected to the control circuit, and the first switch being controlled by the control circuit to be switched on intermittently. The present invention has the protection function and enhances safety during load removing and installation processes.Type: GrantFiled: April 21, 2017Date of Patent: December 10, 2019Assignee: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.Inventors: Junming Zhang, Guoqiang Liu, Pitleong Wong, Yuancheng Ren, Xunwei Zhou
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Patent number: 10327296Abstract: There is provided a dimming circuit, a dimming method and a LED driving circuit. On the basis of the dimming of a dimmer, the circuit according to the disclosure generates a plurality of current reference signals corresponding to a plurality of loads in accordance with a dimming signal, to change a ratio of load currents of the plurality of loads, so that, the adjustment of color temperature is implemented, wherein the dimming signal represents the changes of switching operation or dimming speed of the dimmer, and the ratio of current load currents of the plurality of loads is latched or a predetermined ratio of load currents is latched. According to the disclosure, the dimmer can be used for directly adjusting color temperature, without the need for a MCU, so that, the system compatibility is improved and the cost is decreased.Type: GrantFiled: December 13, 2017Date of Patent: June 18, 2019Assignee: JOULWATT TECHNOLOGY (HANGZHOU)CO., LTD.Inventors: Guoqiang Liu, Pitleong Wong, Yingyan He, Yuancheng Ren, Xunwei Zhou
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Patent number: 10153684Abstract: The present invention discloses a bleeder circuit; solutions of the present invention may be applied in linear driving and switch driving solutions; a threshold voltage is a zero crossing value, and when the input voltage is zero crossing, the load current at this time is zero; a bleeder current is generated to make the input current greater than a holding current of a TRIAC dimmer, to maintain turning-on of the TRIAC dimmer, and a second time is set as a delay time, which reduces power consumption. In the application of switch driving solution, the current regulating circuit is controlled to be enabled according to the waveform features of the previous and latter halves of periods of the sine wave as well as the size of the input current of the driving circuit.Type: GrantFiled: December 30, 2016Date of Patent: December 11, 2018Assignee: Joulwatt Technology (Hangzhou) Co., Ltd.Inventors: Guoqiang Liu, Bai Lang, Junming Zhang, Pitleong Wong, Yuancheng Ren, Xunwei Zhou
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Patent number: 10143051Abstract: The present disclosure discloses a bleeder circuit and a control method thereof, and an LED control circuit. The present disclosure is applied in an LED control circuit of TRIAC dimming, directly or indirectly detects cross-zero point of input voltage; after cross-zero point of the input voltage is delayed by a second time, the bleeder module works to generate bleeder current, and a time between turn-on time of the TRIAC and a time that a driving circuit input current achieves a predetermined value (maintaining current of TRIAC) is a first time. During the first time, the bleeder circuit generates losses; when the first time is greater than a predetermined value, the second time is prolonged; when the first time is smaller than the predetermined value, the second time is reduced, such that the first time is close to or equal to the predetermined value.Type: GrantFiled: April 18, 2017Date of Patent: November 27, 2018Assignee: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.Inventors: Guoqiang Liu, Pitleong Wong, Yuancheng Ren, Xunwei Zhou
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Publication number: 20180241195Abstract: A protection circuit and an illumination driving circuit are described herein. The protection circuit comprises a detection circuit, detecting a current flowing through a first switch to obtain a current detection signal and determining whether there is leakage at an input terminal according to the current detection signal; a control circuit, controlling the first switch to switch on intermittently, detecting the current flowing through the first switch by the detection circuit during a switch-on period of the first switch, and keeping the load at a disconnection state if the detection circuit determines there is leakage; and the first switch, connected to the input terminal, and a control terminal of the first switch being connected to the control circuit, and the first switch being controlled by the control circuit to be switched on intermittently. The present invention has the protection function and enhances safety during load removing and installation processes.Type: ApplicationFiled: April 21, 2017Publication date: August 23, 2018Applicant: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.Inventors: Junming ZHANG, Guoqiang LIU, Pitleong WONG, Yuancheng REN, Xunwei ZHOU
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Publication number: 20180192491Abstract: There is provided a dimming circuit, a dimming method and a LED driving circuit. On the basis of the dimming of a dimmer, the circuit according to the disclosure generates a plurality of current reference signals corresponding to a plurality of loads in accordance with a dimming signal, to change a ratio of load currents of the plurality of loads, so that, the adjustment of color temperature is implemented, wherein the dimming signal represents the changes of switching operation or dimming speed of the dimmer, and the ratio of current load currents of the plurality of loads is latched or a predetermined ratio of load currents is latched. According to the disclosure, the dimmer can be used for directly adjusting color temperature, without the need for a MCU, so that, the system compatibility is improved and the cost is decreased.Type: ApplicationFiled: December 13, 2017Publication date: July 5, 2018Applicant: Chipone Technology (Beijing) Co., Ltd.Inventors: Guoqiang Liu, Pitleong Wong, Yingyan He, Yuancheng Ren, Xunwei Zhou
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Publication number: 20180139816Abstract: The present disclosure discloses a bleeder circuit and a control method thereof, and an LED control circuit. The present disclosure is applied in an LED control circuit of TRIAC dimming, directly or indirectly detects cross-zero point of input voltage; after cross-zero point of the input voltage is delayed by a second time, the bleeder module works to generate bleeder current, and a time between turn-on time of the TRIAC and a time that a driving circuit input current achieves a predetermined value (maintaining current of TRIAC) is a first time. During the first time, the bleeder circuit generates losses; when the first time is greater than a predetermined value, the second time is prolonged; when the first time is smaller than the predetermined value, the second time is reduced, such that the first time is close to or equal to the predetermined value.Type: ApplicationFiled: April 18, 2017Publication date: May 17, 2018Applicant: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.Inventors: Guoqiang LIU, Pitleong WONG, Yuancheng REN, Xunwei ZHOU
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Publication number: 20180131133Abstract: Embodiments of the present invention provide a press tool and an electronic product detecting apparatus including the press tool. The press tool includes: a connector soft-contact member including: a first base plate; a floating plate mounted to the first base plate; and a buffer member mounted between the first base plate and the floating plate and configured such that when receiving a pressing force, the buffer member generates a repulsive force, so that the floating plate is floatable; and a press member connected with the connector soft-contact member such that they are openable and closable relative to each other. The press member includes a second base plate and a connector bearing piece which is mounted to the second base plate and which is positioned just opposite to the floating plate when the connector soft-contact member and the press member are closed.Type: ApplicationFiled: August 16, 2017Publication date: May 10, 2018Inventors: Shaoning Liu, Guofeng Hu, Guoqiang Liu, Weidong Lin, Xiaowen Xu, Yunxiang Jiao, Mingda Zhang, Yang Liu, Feng Wang, Weihua Cao, Liangliang Hu, Yantao Li, Dahai Liu, Jian Ma, Shijie Wang, Xiaobo Wang, Zhuangzhuang Wu, Zhenguo Xing, Yang Yu, Xing Zhang
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Patent number: 9966699Abstract: Embodiments of the present invention provide a press tool and an electronic product detecting apparatus including the press tool. The press tool includes: a connector soft-contact member including: a first base plate; a floating plate mounted to the first base plate; and a buffer member mounted between the first base plate and the floating plate and configured such that when receiving a pressing force, the buffer member generates a repulsive force, so that the floating plate is floatable; and a press member connected with the connector soft-contact member such that they are openable and closable relative to each other. The press member includes a second base plate and a connector bearing piece which is mounted to the second base plate and which is positioned just opposite to the floating plate when the connector soft-contact member and the press member are closed.Type: GrantFiled: August 16, 2017Date of Patent: May 8, 2018Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Shaoning Liu, Guofeng Hu, Guoqiang Liu, Weidong Lin, Xiaowen Xu, Yunxiang Jiao, Mingda Zhang, Yang Liu, Feng Wang, Weihua Cao, Liangliang Hu, Yantao Li, Dahai Liu, Jian Ma, Shijie Wang, Xiaobo Wang, Zhuangzhuang Wu, Zhenguo Xing, Yang Yu, Xing Zhang
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Patent number: 9957671Abstract: An anti-rutting pavement structure is arranged consecutively from bottom to top, a semi-rigid base layer, a SBS emulsified asphalt adhesive layer, a Type II latex cement mortar poured asphalt concrete lower layer, a Type I latex cement mortar poured asphalt concrete middle layer and a high viscosity modified asphalt SMA-13 concrete surface layer.Type: GrantFiled: January 19, 2017Date of Patent: May 1, 2018Assignees: RESEACH INSTITUTE OF HIGHWAY MINISTRY OF TRANSPORT, CHONGQING CONSTRUCTION ENGINEERING GROUP CORPORATION LIMITEDInventors: Ke Zhong, Yifei Wu, Sang Luo, Bo Chen, Guoqiang Liu, Xiaochen Ma, Jing Ding, Chengyong Hu, Guanghua Yue, Ronghua Chang
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Publication number: 20180115234Abstract: The present invention discloses a bleeder circuit; solutions of the present invention may be applied in linear driving and switch driving solutions; a threshold voltage is a zero crossing value, and when the input voltage is zero crossing, the load current at this time is zero; a bleeder current is generated to make the input current greater than a holding current of a TRIAC dimmer, to maintain turning-on of the TRIAC dimmer, and a second time is set as a delay time, which reduces power consumption. In the application of switch driving solution, the current regulating circuit is controlled to be enabled according to the waveform features of the previous and latter halves of periods of the sine wave as well as the size of the input current of the driving circuit.Type: ApplicationFiled: December 30, 2016Publication date: April 26, 2018Applicant: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.Inventors: Guoqiang LIU, Bai LANG, Junming ZHANG, Pitleong WONG, Yuancheng REN, Xunwei ZHOU
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Publication number: 20180044862Abstract: An anti-rutting pavement structure, which is characterized in that it comprises, arranged consecutively from bottom to top, a semi-rigid base layer, a SBS emulsified asphalt adhesive layer, a Type II latex cement mortar poured asphalt concrete lower layer, a Type I latex cement mortar poured asphalt concrete middle layer and a high viscosity modified asphalt SMA-13 concrete surface layer. Compared with prior art, the present invention has improved great contributions of the middle and lower layer of the semi-rigid base layer pavement for rutting under high temperatures and heavy loads, while the pavement having a good crack-resistance, improvement for coordination of the overall deformation of the surface layer and the base layer, and a short construction conservation period, short time before traffic opening, excellent economic performance.Type: ApplicationFiled: January 19, 2017Publication date: February 15, 2018Inventors: Ke ZHONG, Yifei WU, Sang LUO, Bo CHEN, Guoqiang LIU, Xiaochen MA, Jing DING, Chengyong HU, Guanghua YUE, Ronghua CHANG
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Publication number: 20170188575Abstract: A pesticide solid nanodispersion and its preparation method. The said pesticide solid nanodispersion is composed of 0.001-90 parts by weight of pesticide, 0.001-50 parts by weight of surfactants and 5-99.9 parts by weight of water-soluble carriers. The said pesticide is one or more pesticide(s) selected from poorly water-soluble insecticides, fungicides, herbicides or plant growth regulators; the particle size of the said solid nanodispersion is less than 1 ?m. Compared with the prior art, the pesticide of the present invention has smaller particle size, more uniform dispersibility and better coating effect of surfactants. The content of surfactants may be less than 1%, even less than 0.1%, and can maintain good dispersibility and stability as well.Type: ApplicationFiled: November 27, 2015Publication date: July 6, 2017Applicant: INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE, CHINESE ACADEMY OFInventors: Haixin CUI, Bo CUI, Lei FENG, Guoqiang LIU
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Patent number: 8834819Abstract: A powder lime calcining process comprises: transporting fine granules of limestones having a water content less than 4%, and a granule size less than 15 mm, from a raw material storing bin to a small material bin, transporting the materials from the small material bin into an airflow pipe by a belt conveyer, heating and drying the materials, sieving the materials by a sieving device, transporting granules into a cyclone cylinder deduster and a clothbag deduster in turn by airflow pipes, the fine powders of limestones after dedusted are transported into an intermediate bin; the materials within the intermediate bin are transported to four preheating cyclone cylinders by a pneumatic lift pump and airflow pipes, and are preheated and separated; the materials after separated are transported into three cooling cyclone cylinders for cooling and separating the materials, finally transported into a finished product bin by a finished product transporting system.Type: GrantFiled: October 13, 2010Date of Patent: September 16, 2014Assignee: Baoshan Iron & Steel Co., Ltd.Inventors: Jun Wei, Hua Gao, Bin Zhang, Guoqiang Liu
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Publication number: 20130136674Abstract: A powder lime calcining process comprises: transporting fine granules of limestones having a water content less than 4%, and a granule size less than 15 mm, from a raw material storing bin to a small material bin, transporting the materials from the small material bin into an airflow pipe by a belt conveyer, heating and drying the materials, sieving the materials by a sieving device, transporting granules into a cyclone cylinder deduster and a clothbag deduster in turn by airflow pipes, the fine powders of limestones after dedusted are transported into an intermediate bin; the materials within the intermediate bin are transported to four preheating cyclone cylinders by a pneumatic lift pump and airflow pipes, and are preheated and separated; the materials after separated are transported into three cooling cyclone cylinders for cooling and separating the materials, finally transported into a finished product bin by a finished product transporting system.Type: ApplicationFiled: October 13, 2010Publication date: May 30, 2013Inventors: Jun Wei, Hua Gao, Bin Zhang, Guoqiang Liu
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Patent number: 8392889Abstract: A network based algorithmic Service Objective (SO) is evaluated by defining an SO script comprising a plurality of Service Indicators (SIs), each of the SIs comprising an equation including a plurality of operands and at least one operator, instantiating the SO script into an object-oriented representation of the SO, obtaining values for each of the plurality of operands, and computing each of the SI equations using the obtained values.Type: GrantFiled: October 18, 2007Date of Patent: March 5, 2013Assignee: Trendium, Inc.Inventors: Mohamed Battisha, Salah Serghini, Guoqiang Liu, Hanafy Meleis, Sameh Yamany, Ayman Eldeib
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Publication number: 20090106738Abstract: A network based algorithmic Service Objective (SO) is evaluated by defining an SO script comprising a plurality of Service Indicators (SIs), each of the SIs comprising an equation including a plurality of operands and at least one operator, instantiating the SO script into an object-oriented representation of the SO, obtaining values for each of the plurality of operands, and computing each of the SI equations using the obtained values.Type: ApplicationFiled: October 18, 2007Publication date: April 23, 2009Inventors: Mohamed Battisha, Salah Serghini, Guoqiang Liu, Hanafy Meleis, Sameh Yamany, Ayman Eldeib