Patents by Inventor Zhonghua Cai
Zhonghua Cai 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: 20240075502Abstract: The present invention discloses a mattress cleaning device including a conveying assembly, a first brush roller set, a second brush roller set, and a third brush roller set. Multiple groups of the conveying assemblies are arranged horizontally at intervals to form a conveying channel, and multiple alternate spaces are formed between the multiple groups of the conveying assemblies. The first brush roller set includes at least two movable brush roller rotatably arranged in multiple alternate spaces, and the moving brush rollers can move up and down relative to the conveying assembly in a direction perpendicular to the conveying channel so as to clean the front face and the rear face, and the lower face of a mattress. The second brush roller set is rotatably arranged above the conveying assembly to clean the upper end face of the mattress.Type: ApplicationFiled: October 31, 2022Publication date: March 7, 2024Inventors: Hong Chen, Zhonghua Gu, Shengang Cai, Lunan Wang, Yexin Li, Wei Shen
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Publication number: 20220357428Abstract: This application discloses a laser detection apparatus, a method for manufacturing the laser detection apparatus, and a terminal, and belongs to the field of laser detection technologies, for example, light detection and ranging (Lidar). The apparatus includes a multiphase signal generation circuit, an amplifier array, and a laser transmitter array. The amplifier array includes a plurality of first amplifiers, and the laser transmitter array includes a plurality of laser transmitters. A plurality of output ends of the multiphase signal generation circuit are connected to input ends of corresponding first amplifiers, and output ends of the plurality of first amplifiers are connected to corresponding laser transmitters.Type: ApplicationFiled: July 20, 2022Publication date: November 10, 2022Inventors: Zhonghua CAI, Wei WANG, Anliang YU
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Patent number: 11128259Abstract: A power amplification apparatus, a remote radio unit, and a base station are provided to improve power amplification efficiency. The power amplification apparatus includes an envelope modulator, a main power amplifier, and a first auxiliary power amplifier. The envelope modulator is configured to obtain an envelope voltage based on a received envelope signal and output the envelope voltage to the drain of the main power amplifier. The main power amplifier is connected to the envelope modulator and configured to use the envelope voltage as an operating voltage, and is connected to the first auxiliary power amplifier, to output the envelope voltage to a drain of the first auxiliary power amplifier. The first auxiliary power amplifier is configured to use the envelope voltage received from the main power amplifier as an operating voltage.Type: GrantFiled: July 24, 2019Date of Patent: September 21, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Shunzhong Zhang, Lipeng Zhang, Zhonghua Cai
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Patent number: 10879857Abstract: Embodiments of the present invention provide a power amplifier, a radio remote unit RRU, and a base station. A multiphase pulse width modulator performs modulation to generate N multiphase pulse-width modulation PWM signals. The multiphase pulse-width modulation PWMn signal may be amplified. The multiphase pulse-width modulation PWMn signal may be filtered and a combination may be performed at a drain or a collector of a power amplifier transistor. According to the new radio frequency amplifier in accordance with the disclosure, envelope feeding loop inductance can be effectively reduced, so that video bandwidth is increased and DPD correction performance is improved.Type: GrantFiled: September 27, 2016Date of Patent: December 29, 2020Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zhonghua Cai, Lipeng Zhang, Kaizhan Wang, Zhiyuan Pang, Sheng Zhu
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Patent number: 10673384Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: GrantFiled: February 25, 2019Date of Patent: June 2, 2020Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Patent number: 10511266Abstract: A power amplifier control method is disclosed. A phase modulation control signal may be generated according to an envelope signal that is output by a baseband unit. The phase modulation may be performed on a signal of a main power amplifier link and/or an auxiliary power amplifier link in the Doherty power amplifier circuit according to the phase modulation control signal, so that a phase difference between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link after the phase modulation is a specified value corresponding to a current value of the envelope signal, where the specified value is an optimal phase value of a Doherty power amplifier circuit when the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal. High-efficiency power amplifier technology is realized.Type: GrantFiled: June 22, 2018Date of Patent: December 17, 2019Assignee: HUAWEI TECHNOLOGLES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Kaizhan Wang, Wei Jiao, Zhiyuan Pang, Sheng Zhu
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Publication number: 20190348952Abstract: A power amplification apparatus, a remote radio unit, and a base station are provided to improve power amplification efficiency. The power amplification apparatus includes an envelope modulator, a main power amplifier, and a first auxiliary power amplifier. The envelope modulator is configured to obtain an envelope voltage based on a received envelope signal and output the envelope voltage to the drain of the main power amplifier. The main power amplifier is connected to the envelope modulator and configured to use the envelope voltage as an operating voltage, and is connected to the first auxiliary power amplifier, to output the envelope voltage to a drain of the first auxiliary power amplifier. The first auxiliary power amplifier is configured to use the envelope voltage received from the main power amplifier as an operating voltage.Type: ApplicationFiled: July 24, 2019Publication date: November 14, 2019Inventors: Shunzhong ZHANG, Lipeng ZHANG, Zhonghua CAI
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Publication number: 20190341894Abstract: Embodiments of the present invention provide a power amplifier, a radio remote unit RRU, and a base station. A multiphase pulse width modulator performs modulation to generate N multiphase pulse-width modulation PWM signals. The multiphase pulse-width modulation PWMn signal may be amplified. The multiphase pulse-width modulation PWMn signal may be filtered and a combination may be performed at a drain or a collector of a power amplifier transistor. According to the new radio frequency amplifier in accordance with the disclosure, envelope feeding loop inductance can be effectively reduced, so that video bandwidth is increased and DPD correction performance is improved.Type: ApplicationFiled: September 27, 2016Publication date: November 7, 2019Inventors: Zhonghua CAI, Lipeng ZHANG, Kaizhan WANG, Zhiyuan PANG, Sheng ZHU
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Patent number: 10397458Abstract: A telecentric illumination and photographing system for detection of marine microscopic organisms includes an optical path module and an illumination drive module, where the optical path module includes: an LED light source, a light homogenizing rod, a decoherence light homogenizing sheet, a diaphragm, a telecentric collimation camera, where a light beam emitted from the diaphragm is incident into a microscopic organism area with uniform illuminance after passing through the telecentric collimation camera; and a telecentric imaging camera, matching the telecentric collimation camera to receive an illumination beam passing through the microscopic organism area and output the illumination beam to an imaging unit, to obtain an imaging result of uniform illuminance. Further, the illumination drive module enables the LED light source to work in a stable state in which light emitting intensity is constant, thereby improving current output accuracy.Type: GrantFiled: October 13, 2017Date of Patent: August 27, 2019Assignee: GRADUATE SCHOOL AT SHENZHEN, TSINGHUA UNIVERSITYInventors: Xuemin Cheng, Hongsheng Bi, Yonghong He, Zhonghua Cai, Jiayong Lin
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Publication number: 20190190458Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: ApplicationFiled: February 25, 2019Publication date: June 20, 2019Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Patent number: 10230333Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: GrantFiled: February 5, 2018Date of Patent: March 12, 2019Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Publication number: 20180302042Abstract: A power amplifier control method is disclosed. A phase modulation control signal may be generated according to an envelope signal that is output by a baseband unit. The phase modulation may be performed on a signal of a main power amplifier link and/or an auxiliary power amplifier link in the Doherty power amplifier circuit according to the phase modulation control signal, so that a phase difference between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link after the phase modulation is a specified value corresponding to a current value of the envelope signal, where the specified value is an optimal phase value of a Doherty power amplifier circuit when the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal. High-efficiency power amplifier technology is realized.Type: ApplicationFiled: June 22, 2018Publication date: October 18, 2018Inventors: Lipeng Zhang, Zhonghua Cai, Kaizhan Wang, Wei Jiao, Zhiyuan Pang, Sheng Zhu
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Publication number: 20180159477Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: ApplicationFiled: February 5, 2018Publication date: June 7, 2018Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Patent number: 9929695Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: GrantFiled: February 10, 2017Date of Patent: March 27, 2018Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Publication number: 20180041675Abstract: A telecentric illumination and photographing system for detection of marine microscopic organisms includes an optical path module and an illumination drive module, where the optical path module includes: an LED light source, a light homogenizing rod, a decoherence light homogenizing sheet, a diaphragm, a telecentric collimation camera, where a light beam emitted from the diaphragm is incident into a microscopic organism area with uniform illuminance after passing through the telecentric collimation camera; and a telecentric imaging camera, matching the telecentric collimation camera to receive an illumination beam passing through the microscopic organism area and output the illumination beam to an imaging unit, to obtain an imaging result of uniform illuminance. Further, the illumination drive module enables the LED light source to work in a stable state in which light emitting intensity is constant, thereby improving current output accuracy.Type: ApplicationFiled: October 13, 2017Publication date: February 8, 2018Inventors: Xuemin CHENG, Hongsheng BI, Yonghong HE, Zhonghua CAI, Jiayong LIN
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Publication number: 20170155364Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: ApplicationFiled: February 10, 2017Publication date: June 1, 2017Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang