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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：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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3.发明申请MINIMIZING MAGNETIC INTERFERENCE IN A VARIABLE RELUCTANCE RESOLVER EXCITED BY 180 DEGREE DIFFERENTIAL SIGNALS 审中-公开通过180度差分信号优化的可变结构分解算法中的磁化干扰最小化公开(公告)号：US20120194177A1
公开(公告)日：2012-08-02
申请号：US13442613
申请日：2012-04-09
申请人： Chun Soo Park
发明人： Chun Soo Park
IPC分类号： G01B7/30
CPC分类号： G01D3/032
摘要： A multi-pole variable reluctance resolver is balanced wired and driven by 180 degree differential signals. Capacitive passive elements may be serially added to the resolver to minimize magnetic interference and cancel flux between poles of the same polarity and orthogonal poles, as well as minimize the effect of input driving signal distortion. Symmetric networks of resistive and capacitive elements may also be added to the resolver to overcome noise sensitivity associated with balanced wired resolvers.
摘要翻译： 多极可变磁阻解调器由180度差分信号进行平衡连接和驱动。 可以将电容性无源元件串行地添加到旋转变压器中以最小化磁干扰并消除相同极性和正交极点的极点之间的通量，以及最小化输入驱动信号失真的影响。 电阻和电容元件的对称网络也可以添加到旋转变压器，以克服与平衡有线分解器相关的噪声敏感度。
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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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公开(公告)号：US11709268B1
公开(公告)日：2023-07-25
申请号：US17994756
申请日：2022-11-28
申请人： Chun Soo Park
发明人： Chun Soo Park
IPC分类号： G01C3/08 , G01S17/36 , G01S7/4913 , G01S7/4915
CPC分类号： G01S17/36 , G01S7/4913 , G01S7/4915
摘要： In N-phase correlations vector synthesis time-of-flight (ToF) ranging employing N correlators, the correlation time at each signal cycle is reduced to mitigate pixel saturation by sun light or strong reflected light as well as to minimize the influence of external noise. Typically, the correlation time, during which the received signal is correlated with the transmitting signal, is set to be one full cycle in each transmitting signal period. In this invention, reducing the correlation time to
1
N
,
1
2
N
,
or
1
k
N
of a full cycle period in each transmitting signal period is disclosed, where k is a real number greater than 1, but k is not 2. Depending on the intensity of the ambient light, the correlation time is flexibly and optimally selected. Multiple fractional correlations produced by a reduced correlation time are integrated over multiple signal periods to obtain more reliable signals of the correlation vectors.-
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：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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