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公开(公告)号：US11221237B2
公开(公告)日：2022-01-11
申请号：US16766275
申请日：2019-09-16
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： In an absolute encoder, a system of linear equations is built based on the mathematical analysis that each phase-delayed displacement signal from a plurality of position sensors placed at certain electrical phase angle positions in a 360° electrical cycle contains a component of its two orthogonal displacement signals, sin(θ) and cos(θ). The two orthogonal displacement signals are optimally obtained by solving the system of linear equations based on the principle that the sum of all other tap's signals other than own tap's signal is forced to be zero at each tap, which is essentially applying the zero-force (ZF) equalization to the phase-delayed sinusoidal or square wave displacement signals of position sensors. By applying the ZF equalization to distortion-prone raw signals of a plurality of position sensors, signal components, other than the two orthogonal displacement signals, are eliminated and distortion-minimized optimal two orthogonal displacement signals are synthesized.
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公开(公告)号：US20210310832A1
公开(公告)日：2021-10-07
申请号：US17246933
申请日：2021-05-03
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A novel multi-phase resolver topology and apparatus is provided for measuring a displacement of movement body more precisely and economically. In variable reluctance (VR) resolvers, N coil-poles are placed at N equally spaced positions over one turn of the stator, N being an odd number greater than or equal to 5. Each coil serves both as an excitation and a sensing coil, and all N coils are wound with the same number of turns at an identical electrical polarity. Depending on the installed rotor lobe shape, N sinusoidal or quasi-square waveform displacement signals are sensed on multi-phase resolver, and from which two-phase orthogonal displacement signals are optimally and differentially synthesized. The multi-phase resolver topology and differential synthesis method is also applied to other types of resolvers, such as wound-rotor, inductance, capacitive, and magnetic resolvers.
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公开(公告)号：US20210310831A1
公开(公告)日：2021-10-07
申请号：US17246922
申请日：2021-05-03
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A novel multi-phase resolver topology and apparatus is provided for measuring a displacement of movement body more precisely and economically. In variable reluctance (VR) resolvers, N coil-poles are placed at N equally spaced positions over one turn of the stator, N being an odd number greater than or equal to 5. Each coil serves both as an excitation and a sensing coil, and all N coils are wound with the same number of turns at an identical electrical polarity. Depending on the installed rotor lobe shape, N sinusoidal or quasi-square waveform displacement signals are sensed on multi-phase resolver, and from which two-phase orthogonal displacement signals are optimally and differentially synthesized. The multi-phase resolver topology and differential synthesis method is also applied to other types of resolvers, such as wound-rotor, inductance, capacitive, and magnetic resolvers.
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公开(公告)号：US11143525B1
公开(公告)日：2021-10-12
申请号：US17170038
申请日：2021-02-08
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A novel multi-phase resolver topology and apparatus is provided for measuring a displacement of movement body more precisely and economically. In variable reluctance (VR) resolvers, N coil-poles are placed at N equally spaced positions over one turn of the stator, N being an odd number greater than or equal to 5. Each coil serves both as an excitation and a sensing coil, and all N coils are wound with the same number of turns at an identical electrical polarity. Depending on the installed rotor lobe shape, N sinusoidal or quasi-square waveform displacement signals are sensed on multi-phase resolver, and from which two-phase orthogonal displacement signals are optimally and differentially synthesized. The multi-phase resolver topology and differential synthesis method is also applied to other types of resolvers, such as wound-rotor, inductance, capacitive, and magnetic resolvers.
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公开(公告)号：US20220229165A1
公开(公告)日：2022-07-21
申请号：US17572173
申请日：2022-01-10
申请人： Chun Soo Park
发明人： Chun Soo Park
IPC分类号： G01S7/493 , G01S17/36 , G01S17/86 , G06F3/0346
摘要： A TOF ranging system based on a multi-phase correlation vector synthesis ranging method is presented. The method is a generalized expansion from conventional 2- or 4-phase correlations to arbitrary N-phase correlations in finding in-phase (I) and quadrature-phase (Q) signals of the reflected signal at the receiver, where N is an odd number greater than or equal to 3. The correlation vectors of the output of multi-phase correlators are processed by a zero-force synthesizer to produce optimal I and Q signals, from which the phase delay or ranging information is calculated. Embodiments disclose necessary components in realization of the method, such as half clock shifter, full clock shifter, dual edge reference pulse generator, and correlation integrator. The TOF ranging method enables the construction of finer and more accurate TOF systems like 3D imaging systems, 3D sonar imaging systems, or 3D touchless pointer systems.
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公开(公告)号：US11435455B2
公开(公告)日：2022-09-06
申请号：US17572173
申请日：2022-01-10
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A TOF ranging system based on a multi-phase correlation vector synthesis ranging method is presented. The method is a generalized expansion from conventional 2- or 4-phase correlations to arbitrary N-phase correlations in finding in-phase (I) and quadrature-phase (Q) signals of the reflected signal at the receiver, where N is an odd number greater than or equal to 3. The correlation vectors of the output of multi-phase correlators are processed by a zero-force synthesizer to produce optimal I and Q signals, from which the phase delay or ranging information is calculated. Embodiments disclose necessary components in realization of the method, such as half clock shifter, full clock shifter, dual edge reference pulse generator, and correlation integrator. The TOF ranging method enables the construction of finer and more accurate TOF systems like 3D imaging systems, 3D sonar imaging systems, or 3D touchless pointer systems.
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公开(公告)号：US11187557B2
公开(公告)日：2021-11-30
申请号：US17246933
申请日：2021-05-03
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A novel multi-phase resolver topology and apparatus is provided for measuring a displacement of movement body more precisely and economically. In variable reluctance (VR) resolvers, N coil-poles are placed at N equally spaced positions over one turn of the stator, N being an odd number greater than or equal to 5. Each coil serves both as an excitation and a sensing coil, and all N coils are wound with the same number of turns at an identical electrical polarity. Depending on the installed rotor lobe shape, N sinusoidal or quasi-square waveform displacement signals are sensed on multi-phase resolver, and from which two-phase orthogonal displacement signals are optimally and differentially synthesized. The multi-phase resolver topology and differential synthesis method is also applied to other types of resolvers, such as wound-rotor, inductance, capacitive, and magnetic resolvers.
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公开(公告)号：US11169007B2
公开(公告)日：2021-11-09
申请号：US17246922
申请日：2021-05-03
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A novel multi-phase resolver topology and apparatus is provided for measuring a displacement of movement body more precisely and economically. In variable reluctance (VR) resolvers, N coil-poles are placed at N equally spaced positions over one turn of the stator, N being an odd number greater than or equal to 5. Each coil serves both as an excitation and a sensing coil, and all N coils are wound with the same number of turns at an identical electrical polarity. Depending on the installed rotor lobe shape, N sinusoidal or quasi-square waveform displacement signals are sensed on multi-phase resolver, and from which two-phase orthogonal displacement signals are optimally and differentially synthesized. The multi-phase resolver topology and differential synthesis method is also applied to other types of resolvers, such as wound-rotor, inductance, capacitive, and magnetic resolvers.
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公开(公告)号：US20210310830A1
公开(公告)日：2021-10-07
申请号：US17170038
申请日：2021-02-08
申请人： Chun Soo Park
发明人： Chun Soo Park
摘要： A novel multi-phase resolver topology and apparatus is provided for measuring a displacement of movement body more precisely and economically. In variable reluctance (VR) resolvers, N coil-poles are placed at N equally spaced positions over one turn of the stator, N being an odd number greater than or equal to 5. Each coil serves both as an excitation and a sensing coil, and all N coils are wound with the same number of turns at an identical electrical polarity. Depending on the installed rotor lobe shape, N sinusoidal or quasi-square waveform displacement signals are sensed on multi-phase resolver, and from which two-phase orthogonal displacement signals are optimally and differentially synthesized. The multi-phase resolver topology and differential synthesis method is also applied to other types of resolvers, such as wound-rotor, inductance, capacitive, and magnetic resolvers.
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公开(公告)号：US20240121142A1
公开(公告)日：2024-04-11
申请号：US17963604
申请日：2022-10-11
申请人： Chun Soo Park
发明人： Chun Soo Park
IPC分类号： H04L27/233 , H04L27/36
CPC分类号： H04L27/2334 , H04L27/364
摘要： An N-phase vector synthesis demodulator employing N number of mixers is presented. The received signal is mixed with locally generated N number of phase-shifted carrier signals at the N mixers, the individual phases of which are successively and equally 360°/N shifted. The final in-phase (I) and quadrature-phase (Q) signals are zero-force synthesized from the demodulated N-phase vector signals. Compared with the conventional I/Q demodulator that obtains the I and Q signals directly from two mixers of 0° and 90° carrier signal phases, the multi-phase demodulator provides significantly high linearities in the demodulated I and Q signals as the zero-force synthesizer performs an optimal combining of the N-phase demodulated signals while minimizing distortions, interferences, and noise.
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