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1.发明授权公开(公告)号：US11863033B2
公开(公告)日：2024-01-02
申请号：US17995953
申请日：2020-07-27
发明人： Shiqiang Zheng , Shitong Wei , Tong Wen , Kun Wang , Yun Le , Kun Mao , Di Wang
IPC分类号： H02K29/08 , H02K11/215 , G01B7/02 , G01D5/14 , G01R33/07
CPC分类号： H02K29/08 , G01B7/02 , G01D5/145 , G01R33/07 , H02K11/215 , H02K2213/03
摘要： The present disclosure provides a displacement detection circuit of a maglev rotor system and a displacement self-sensing system thereof. The displacement detection circuit comprises a current sampling circuit (10) configured to collect a current flowing through a corresponding coil (4); coils (4), which are coils (4) distributed in series in the maglev rotor system; Hall sensors (20), the Hall sensors (20) being arranged in an upper auxiliary air gap (8) and a lower auxiliary air gap (8) of the maglev rotor system, and sensing surfaces of the Hall sensors (20) being perpendicular to magnetic field directions in the corresponding auxiliary air gaps (8); a Hall signal processing circuit (30) connected to the Hall sensors (20) and configured to differentiate a Hall sensing signal corresponding to the upper auxiliary air gap (8) and a Hall sensing signal corresponding to the lower auxiliary air gap (8); and a displacement signal resolving circuit (40) connected to the current sampling circuit (10) and the Hall signal processing circuit (30) respectively and configured to acquire a displacement of a rotor in the maglev rotor system according to the current and a differentiation result. By using the detection circuit and the displacement self-sensing system thereof, the axial size of the rotor is reduced, such that detection and control are coplanar, and high precision and simple design are realized.
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公开(公告)号：US20220244082A1
公开(公告)日：2022-08-04
申请号：US17718383
申请日：2022-04-12
发明人： YUANZHI XU , ZONGXIA JIAO , QIZHI YANG , XIAOXI ZHAO
摘要： A method for measuring flow rate based on dynamic optimization of three pressure sensors is provided. In the method, pressure sensors are set on the fix positions of both ends of the test straight pipe and on the middle position of the test straight pipe, and are configured to measure the pressure of the fluid at the positions where the pressure sensors are set in real time, and the real-time dynamic flow rate of the fluid in the pipe can be estimated through a flow rate calculation estimator. The method has fast response speed and high measurement accuracy, can effectively eliminate the noise interference of vibration in the environment, and has strong anti-interference ability.
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公开(公告)号：US20210293257A1
公开(公告)日：2021-09-23
申请号：US17202593
申请日：2021-03-16
发明人： ZONGXIA JIAO , YUANZHI XU , RENYUAN WANG
IPC分类号： F15B1/16 , F16L55/054 , F04B11/00
摘要： The present disclosure provides a gas-liquid coupling type fluid pulsation attenuator, which comprises: substrate, which is hollow and with an opening at one end; bladder, which is located at the hollow part of the substrate, and a first chamber is formed between the bladder and the inner wall of the substrate; and lining, which is located inside the bladder. The gas-liquid coupling type fluid pulsation attenuator of the present disclosure makes the fluid in the main pipe enter the first chamber through the opening of the substrate, and the bladder is filled with gas. Therefore, under the action of the pressure difference between the fluid pressure in the first chamber and the air pressure in the bladder, the bladder deforms, so as to absorb the flow pulsation through the expansion and contraction of the bladder, to make the oil flow in the hydraulic energy system more stable.
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公开(公告)号：US20210118204A1
公开(公告)日：2021-04-22
申请号：US17031096
申请日：2020-09-24
发明人： Jian FU , Jianbing DONG , Changsheng ZHANG
IPC分类号： G06T11/00 , G01N23/046 , G01N23/083
摘要： The present invention discloses a method for reconstructing incomplete data of X-ray absorption contrast computed tomography (CT) based on deep learning (DL). The method includes the following steps: using a filtered back projection (FBP) algorithm to obtain an initial reconstructed image; forward projecting the initial reconstructed image to obtain artifact-contaminated complete projection sequences; using a DL technique to process the artifact-contaminated projection sequences to obtain artifact-free projection sequences; using the FBP algorithm to reconstruct the artifact-free projection sequences to obtain a final reconstructed image. Compared with the traditional incomplete data reconstruction methods, the examples of the present invention feature a simpler calculation process, fewer parameters to be manually set, a faster calculation speed and higher image quality.
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公开(公告)号：US11386595B2
公开(公告)日：2022-07-12
申请号：US17031096
申请日：2020-09-24
发明人： Jian Fu , Jianbing Dong , Changsheng Zhang
IPC分类号： G01N23/00 , G06K9/00 , G06T11/00 , G01N23/046 , G01N23/083
摘要： The present invention discloses a method for reconstructing incomplete data of X-ray absorption contrast computed tomography (CT) based on deep learning (DL). The method includes the following steps: using a filtered back projection (FBP) algorithm to obtain an initial reconstructed image; forward projecting the initial reconstructed image to obtain artifact-contaminated complete projection sequences; using a DL technique to process the artifact-contaminated projection sequences to obtain artifact-free projection sequences; using the FBP algorithm to reconstruct the artifact-free projection sequences to obtain a final reconstructed image. Compared with the traditional incomplete data reconstruction methods, the examples of the present invention feature a simpler calculation process, fewer parameters to be manually set, a faster calculation speed and higher image quality.
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公开(公告)号：US11151439B2
公开(公告)日：2021-10-19
申请号：US17043677
申请日：2019-04-25
发明人： Peng Ouyang , Yu Pan , Youguang Zhang , Weisheng Zhao
摘要： A computing in-memory system and computing in-memory method based on a skyrmion race memory are provided. The system comprises a circuit architecture of SRM-CIM. The circuit architecture of the SRM-CIM comprises a row decoder, a column decoder, a voltage-driven, a storage array, a modified sensor circuit, a counter Bit-counter and a mode controller. The voltage-driven includes two NMOSs, and the two NMOSs are respectively connected with a selector MUX. The modified sensor circuit compares the resistance between a first node to a second node and a third node to a fourth node by using a pre-charge sense amplifier. The storage array is composed of the skyrmion racetrack memories. The computing in-memory architecture is designed by utilizing the skyrmion racetrack memory, so that storage is realized in the memory, and computing operation can be carried out in the memory.
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公开(公告)号：US20210019596A1
公开(公告)日：2021-01-21
申请号：US17043677
申请日：2019-04-25
发明人： Peng OUYANG , Yu PAN , Youguang ZHANG , Weisheng ZHAO
摘要： A computing in-memory system and computing in-memory method based on a skyrmion race memory are provided. The system comprises a circuit architecture of SRM-CIM. The circuit architecture of the SRM-CIM comprises a row decoder, a column decoder, a voltage-driven, a storage array, a modified sensor circuit, a counter Bit-counter and a mode controller. The voltage-driven includes two NMOSs, and the two NMOSs are respectively connected with a selector MUX. The modified sensor circuit compares the resistance between a first node to a second node and a third node to a fourth node by using a pre-charge sense amplifier. The storage array is composed of the skyrmion racetrack memories. The computing in-memory architecture is designed by utilizing the skyrmion racetrack memory, so that storage is realized in the memory, and computing operation can be carried out in the memory.
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公开(公告)号：US12068713B2
公开(公告)日：2024-08-20
申请号：US17995410
申请日：2020-07-22
摘要： A sensorless commutation error compensation system for a brushless motor, comprises: a brushless motor (200) and a commutation logic module circuit (100). The commutation logic module circuit (100) is connected to three virtual Hall signal output ends of the brushless motor (200), and used for receiving three virtual Hall signals output by the brushless motor (200), obtaining three error compensation angle signals on the basis of the three virtual Hall signals, respectively superimposing the three error compensation angle signals and the three virtual Hall signals to form superposition results, and controlling the brushless motor (200) to adjust commutation timing on the basis of the superposition results, so as to achieve commutation error compensation. The system controls commutation errors on the basis of currents and counter-electromotive forces of three phases, instead of controlling the commutation errors on the basis of the current and the counter-electromotive force of one of the three phases, so that a torque ripple of a brushless direct-current motor can be reduced and a working efficiency of the motor can be improved.
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公开(公告)号：US20240183696A1
公开(公告)日：2024-06-06
申请号：US18401647
申请日：2024-01-01
发明人： YUANZHI XU , Zongxia Jiao , Qizhi Yang , Xiaoxi Zhao
IPC分类号： G01F1/34
CPC分类号： G01F1/34
摘要： A method for measuring flow rate based on dynamic optimization of three pressure sensors is provided. In the method, pressure sensors are set on the fix positions of both ends of the test straight pipe and on the middle position of the test straight pipe, and are configured to measure the pressure of the fluid at the positions where the pressure sensors are set in real time, and the real-time dynamic flow rate of the fluid in the pipe can be estimated through a flow rate calculation estimator. The method has fast response speed and high measurement accuracy, can effectively eliminate the noise interference of vibration in the environment, and has strong anti-interference ability.
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公开(公告)号：US20230179127A1
公开(公告)日：2023-06-08
申请号：US17995410
申请日：2020-07-22
摘要： A sensorless commutation error compensation system for a brushless motor, comprises: a brushless motor (200) and a commutation logic module circuit (100). The commutation logic module circuit (100) is connected to three virtual Hall signal output ends of the brushless motor (200), and used for receiving three virtual Hall signals output by the brushless motor (200), obtaining three error compensation angle signals on the basis of the three virtual Hall signals, respectively superimposing the three error compensation angle signals and the three virtual Hall signals to form superposition results, and controlling the brushless motor (200) to adjust commutation timing on the basis of the superposition results, so as to achieve commutation error compensation. The system controls commutation errors on the basis of currents and counter-electromotive forces of three phases, instead of controlling the commutation errors on the basis of the current and the counter-electromotive force of one of the three phases, so that a torque ripple of a brushless direct-current motor can be reduced and a working efficiency of the motor can be improved.
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