公开(公告)号：US11644312B1

公开(公告)日：2023-05-09

申请号：US17901295

申请日：2022-09-01

申请人： ZHEJIANG UNIVERSITY

发明人： Tiantian Huang ,  Meng Niu ,  Lingyun Ye ,  Kaichen Song

IPC分类号： G01C19/32 ,  H02J50/10 ,  G01C21/16 ,  G01C19/18 ,  G01C19/10 ,  H01F27/28 ,  H01F27/24 ,  H04B10/116

CPC分类号： G01C19/32 ,  G01C19/10 ,  G01C19/18 ,  G01C21/16 ,  H01F27/24 ,  H01F27/28 ,  H02J50/10 ,  H04B10/116

摘要： Disclosed is a single-axis rotational inertial navigation system based on bidirectional optical communication and wireless power supply. The system comprises a bidirectional optical communication unit, a wireless power supply unit, a motor driving unit, an inertial measurement unit, a rotating-end information acquisition and processing unit, and a fixed-end information receiving and processing unit. According to the system, in the same transmission channel, information interaction between a rotating end and a fixed end is achieved by adopting infrared light communication and visible light communication; and medium-power high-efficiency wireless energy transmission under a specific distance is achieved by adopting a magnetically coupled resonant wireless power supply method. The design of a high-accuracy motor driving unit is achieved by adopting the design of combining a frameless torque motor with an incremental circular grating and double reading heads.

公开(公告)号：US11874113B2

公开(公告)日：2024-01-16

申请号：US17244965

申请日：2021-04-30

申请人： ZHEJIANG UNIVERSITY

发明人： Kaichen Song ,  Jinlong Yu ,  Lingyun Ye ,  Ju Wang

IPC分类号： G01C19/72 ,  G02B27/28

CPC分类号： G01C19/722 ,  G02B27/283

摘要： A bidirectional optical-carrying microwave resonance system based on a circulator structure and a method for detecting angular velocity by said system. A high-stability optical-carrying microwave of which polarization states in forward and reverse directions are perpendicular is generated in an optical fiber ring by utilizing a regenerative mold locking technology, a cavity length control technology, and a polarization state separation technology, and the optical-carrying microwave is used for measuring a rotational angular velocity. The circulator structure is adopted and the bidirectional optical-carrying microwave resonance is achieved by means of a bidirectional regenerative mode locking technology. A reciprocal bidirectional optical-carrying microwave resonance system is achieved on the basis of a non-reciprocal error elimination technology of a wide-spectrum optical interferometer. The polarization state separation technology is adopted to achieve dual-wavelength separation of optical signals and the perpendicular polarization state is adopted for opposite transmission in a sensitive ring, so that the detection capability of the sensitive ring is improved. The cavity length control technology is adopted to lock a microwave oscillation frequency in one direction to a high-stability standard-time reference source, so that a relative cavity length of an optical resonant cavity is stabilized. The system has the characteristics of high practicability, high measurement precision and the like.

公开(公告)号：US11378401B2

公开(公告)日：2022-07-05

申请号：US17244962

申请日：2021-04-30

申请人： ZHEJIANG UNIVERSITY

发明人： Kaichen Song ,  Jinlong Yu ,  Lingyun Ye ,  Ju Wang

IPC分类号： G01C19/72 ,  G01J4/04

摘要： A polarization-maintaining fully-reciprocal bi-directional optical carrier microwave resonance system and an angular velocity measurement method thereof. In the system, highly stable optical carrier microwaves are generated in a clockwise direction and a counterclockwise direction in the same resonant cavity, and are used to measure the angular velocity of rotation of a carrier apparatus. A fully reciprocal ring-shaped resonant cavity structure is used to achieve a fully reciprocal bi-directional optical resonance system. A polarization state separation technique is used to separate an optical signal into two wavelengths, and optical signals with perpendicular polarization states are transmitted in opposite directions in a sensing ring, thereby improving the measurement capability of the sensing ring. Bi-directional optical carrier microwave resonance is achieved by using a phase tracking structure and a regenerative mode locking technique. A cavity length control technique is used to lock the oscillation frequency of microwaves in one of the directions to a highly stable standard time reference source, thereby achieving a stable relative cavity length of an optical resonant cavity. The described key techniques greatly improve the signal-to-noise ratio of bi-directional oscillation difference frequency signals caused by the Sagnac effect. The system and the method are practical and have high measurement precision.

公开(公告)号：US10235321B2

公开(公告)日：2019-03-19

申请号：US15553713

申请日：2016-05-03

申请人： ZHEJIANG UNIVERSITY

发明人： Lingyun Ye ,  Xinglin Sun ,  Caixia Li ,  Kaichen Song

IPC分类号： G06F13/40

摘要： A stacking modular instrument bus device includes N instrument sub-modules, N+1 customized bus connectors, a first bus termination module and a second bus termination module. The N instrument sub-modules are connected with each other in series through the N−1 customized bus connectors to form an instrument sub-system, two ends of the N instrument sub-modules are respectively connected with the first bus termination module and the second bus termination module through one customized bus connector; each of the instrument sub-modules includes a bus unit and a functional unit. The present invention can freely stack and combine all the instrument sub-modules in the manner of building blocks, which is divorced from the conventional backboard type structure and becomes more flexible. Every instrument sub-module has the independent and complete instrument structure and form the system itself. The bus unit of the instrument sub-module is detached from the functional unit thereof.

公开(公告)号：US20230092014A1

公开(公告)日：2023-03-23

申请号：US17816866

申请日：2022-08-02

申请人： Zhejiang University

发明人： Xinglin Sun ,  Haojie Wu ,  Xinyue Tan ,  Lingyun Ye

IPC分类号： G01R23/10

摘要： A phase frequency detector-based high-precision feedback frequency measurement apparatus and method: a Field Programmable Gate Array (FGPA) roughly measures a frequency fx of a measured time-frequency pulse by an equal-precision frequency measurement method; a Direct Digital Synthesizer (DDS) automatically synthesizes a frequency fx’ according to the fx roughly measured by the FPGA; the fx and the fx’ are sent to a phase frequency detector for performing phase frequency detection and then sent to the FPGA after passing through a charge pump, a low-pass filter circuit, and an (Analogue-to-Digital) A/D converter; the FPGA processes a frequency difference obtained by the phase frequency detector and then transmits the processed frequency difference to the DDS to form a negative feedback frequency measurement system so that the DDS continuously adjusts the fx’ according to a frequency difference measurement result until the output of the DDS is stable. Therefore, precise measurement of the time-frequency pulse to be measured is realized.

公开(公告)号：US09568319B2

公开(公告)日：2017-02-14

申请号：US14981808

申请日：2015-12-28

申请人： ZHEJIANG UNIVERSITY

发明人： Kaichen Song ,  Jinlong Yu ,  Lingyun Ye

IPC分类号： G01C19/72

CPC分类号： G01C19/727 ,  G01C19/72

摘要： The present invention provides an angular velocity detection method adopting a bi-directional full reciprocal coupling optoelectronic oscillator, which is implemented on an optical carrier microwave gyroscope. The optical carrier microwave gyroscope is a bi-directional resonant optical carrier microwave angular velocity measurement device sharing one optical fiber loop. The core of the method lies in that the Sagnac effect is sensed using a bi-directional optical carrier microwave resonant cavity, where the optical carrier microwave resonant cavity employs a coupling optoelectronic oscillator to achieve a bi-directional full reciprocal optical fiber path, and non-reciprocity error of the resonant cavity is eliminated effectively. The angular velocity detection method has features of high-precision, easy implementation and low costs.

摘要翻译： 本发明提供一种采用双向全双向耦合光电子振荡器的角速度检测方法，该光电子振荡器在光载波微波陀螺仪上实现。 光载波微波陀螺仪是共享一个光纤回路的双向谐振光载波微波角速度测量装置。 该方法的核心在于，使用双向光载波微波谐振腔感测Sagnac效应，其中光载波微波谐振腔采用耦合光电子振荡器来实现双向全互逆光纤路径， 有效消除了谐振腔的互易性误差。 角速度检测方法具有精度高，易于实现，成本低等特点。

公开(公告)号：US11965919B2

公开(公告)日：2024-04-23

申请号：US17816866

申请日：2022-08-02

申请人： Zhejiang University

发明人： Xinglin Sun ,  Haojie Wu ,  Xinyue Tan ,  Lingyun Ye

IPC分类号： G01R23/10

CPC分类号： G01R23/10

摘要： A phase frequency detector-based high-precision feedback frequency measurement apparatus and method: a Field Programmable Gate Array (FGPA) roughly measures a frequency fx of a measured time-frequency pulse by an equal-precision frequency measurement method; a Direct Digital Synthesizer (DDS) automatically synthesizes a frequency fx′ according to the fx roughly measured by the FPGA; the fx and the fx′ are sent to a phase frequency detector for performing phase frequency detection and then sent to the FPGA after passing through a charge pump, a low-pass filter circuit, and an (Analogue-to-Digital) A/D converter; the FPGA processes a frequency difference obtained by the phase frequency detector and then transmits the processed frequency difference to the DDS to form a negative feedback frequency measurement system so that the DDS continuously adjusts the fx′ according to a frequency difference measurement result until the output of the DDS is stable. Therefore, precise measurement of the time-frequency pulse to be measured is realized.

公开(公告)号：US20180173663A1

公开(公告)日：2018-06-21

申请号：US15553713

申请日：2016-05-03

申请人： ZHEJIANG UNIVERSITY

发明人： Lingyun Ye ,  Xinglin Sun ,  Caixia Li ,  Kaichen Song

IPC分类号： G06F13/40

CPC分类号： G06F13/4027 ,  G06F13/40 ,  G06F13/4095

摘要： A stacking modular instrument bus device is disclosed, which includes N instrument sub-modules, N+1 customized bus connectors, a first bus termination module and a second bus termination module. The N instrument sub-modules are connected with each other in series through the N−1 customized bus connectors to form an instrument sub-system, two ends of the N instrument sub-modules are respectively connected with the first bus termination module and the second bus termination module through one customized bus connector; each of the instrument sub-modules includes a bus unit and a functional unit. The present invention can freely stack and combine all the instrument sub-modules in the manner of building blocks, which is divorced from the conventional backboard type structure and becomes more flexible. Every instrument sub-module has the independent and complete instrument structure and form the system itself. The bus unit of the instrument sub-module is detached from the functional unit thereof. The present invention adopts the independent single-board design, which is more conducive to update the instrument bus system, thus saving the development time and design cost.