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公开(公告)号：US12126484B1
公开(公告)日：2024-10-22
申请号：US18199066
申请日：2023-05-18
CPC分类号： H04L27/365 , H04L5/001 , H04L27/367
摘要： A constant amplitude Radio Frequency (RF) signal is created by ordering complex information bearing symbols in the frequency domain along with their complex conjugates, and performing an inverse Fourier transform. This produces an analytic real-only transformed baseband signal. The real-only baseband signal is used to linearly vary the phase angle of a carrier wave while its amplitude remains constant. After reception, multi-path distortion is canceled. A time series of recovered phase angle is un-transformed with a FFT (fast Fourier transform) to produce I (in-phase) and Q (quadrature) samples. Demodulation occurs in a receiver by recovering carrier's phase angle vs. time. Forward error correction may be applied to data if desired. This may be called PM-OFDM (Phase Modulated-orthogonal frequency division multiplexing). This modulation method produces a relatively high amplitude Continuous Wave (CW) component to assist demodulation, and subcarriers near the CW can be zeroed-out to improve the CW recovery and tracking of frequency error and phase noise. The PM-OFDM signal can also be linearly precoded, creating PM-LP-OFDM. PM-LP-OFDM has a characteristic of a lower phase angle crest factor, enabling a lower peak phase rotation. Outer frequency subcarriers can be nulled to reduce occupied bandwidth, or to allow simultaneous reception of multi-user transmissions by a receiver. This can be called PM-LP-OFMDA (phase modulated-linear precoded-orthogonal frequency division multiple access).
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公开(公告)号：US20230339273A1
公开(公告)日：2023-10-26
申请号：US17728591
申请日：2022-04-25
IPC分类号： B60F1/04
CPC分类号： B60F1/04 , B60F2301/10 , B60F2301/04
摘要： A railroad switch (in USA), turnout, or [set of] points (Europe) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. This invention describes a rail transportation system that allows vehicles to change tracks at railroad switch locations while all supporting and guiding rails remain static. Vehicles have diverters that apply lateral force to direct the vehicle to go onto the desired track, right, left, or straight ahead. This is enabled by the diverters plus rail wheels that have inside flanges and wide cylindrical surfaces. This innovation allows rail vehicles to travel through a connected rail system like a highway system that is transporting trucks, buses, and cars on paved roads. This system may operate under a computerized traffic control system and allows mass transit systems to respond to ride requests, enabling 24-hour route-adaptive mass transit. The track system can be placed into a road, like tram (or street cars) tracks. Vehicle can form into coupled trains while moving, and passengers can change routes in transit by changing coupled cars. Rail switches can be static for self-switching vehicles, but normally static components can adapt to accommodate conventional rail-switched rail vehicles.
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公开(公告)号：US20210153496A1
公开(公告)日：2021-05-27
申请号：US16695628
申请日：2019-11-26
IPC分类号： A01M21/04
摘要： A week killing device where weeds or other undesirable vegetation are killed by radio frequency (RF) energy applied directly to the weed by a probe inserted into or near the weed. The probe is comprised of a center pin, which is electrically hot, surrounded by periphery pins which are grounded. A reflection measuring circuit makes an impedance measurement of the probe in the ground and a matching circuit is adjusted to make an impedance match. Next a RF generator applies RF energy through the matching circuit into the probe. Energy delivery is monitored to insure weed kill by thermal heating. The probe can be manually applied by a person or applied by an autonomous vehicle using computer vision (CV) and artificial intelligence (AI) to identify weeds and avoid row crops. The weed killing device may apply power to the above-ground portion a of a weed with the root providing a ground return. The weed killing device may be towed and apply RF energy when a weed is detected by the impedance measurement circuit.
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公开(公告)号：US11230813B1
公开(公告)日：2022-01-25
申请号：US17072664
申请日：2020-10-16
摘要： A track system for transporting people and goods with two support rails plus a side stabilizer mechanism associated with one or both rails. The side stabilizer is employed to provide lateral stability and keep a vehicle's rail wheels on the support rails. The side stabilizer may be a protruding bar or a recessed groove. This track system enables vehicles to change support rails at a junction with stationary non-switching rails. Rail wheels roll over the support rails and support the weight of the vehicle while on the rails. Interior side rollers contact the interior of the bar side stabilizer and maintain the vehicle's rail wheels centered over the support rails. Exterior side rollers contact an exterior of one of the bar side stabilizers and forces the vehicle to stay on the current track or to change to a different track. Recessed grooves and dual-flange wheels can alternately provide side stabilization. At track junctions the vehicle can change direction, pass other vehicles, change lanes, turn-around, and load or unloading passengers or freight. This track system may be integrated with a conventional road system or with a controlled-access (autobahn/interstate) highway system. Optional road wheels allow the vehicle to exit the track system and travel on conventional roads, or dual-mode road/rail wheels can be used for travel on both track and pavement. An automatic traffic control system controls traffic on the track system and enables self-driving vehicles. Powering for the vehicles can be provided by the track system. The system can be miniaturized and used for the model/toy market.
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公开(公告)号：US11364940B1
公开(公告)日：2022-06-21
申请号：US17460188
申请日：2021-08-28
IPC分类号： B61F13/00
摘要： A railroad switch (in USA), turnout, or [set of] points (Europe) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. This invention describes a rail transportation system that allows vehicles to change tracks at railroad switch locations while all supporting and guiding rails remain static. Vehicles have diverters that apply lateral force to direct the vehicle to go onto the desired track, right, left, or straight ahead. This is enabled by the diverters plus rail wheels that have inside flanges and wide cylindrical surfaces. This innovation allows rail vehicles to travel through a connected rail system like a highway system that is transporting trucks, buses, and cars on paved roads. This system may operate under a computerized traffic control system and allows mass transit systems to respond to ride requests, enabling 24-hour route-adaptive mass transit. The track system can be placed into a road, like tram (or street cars) tracks. Vehicle can form into coupled trains while moving, and passengers can change routes in transit by changing coupled cars. Rail switches can be static for self-switching vehicles, but normally static components can adapt to accommodate conventional rail-switched rail vehicles.
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公开(公告)号：US20210237526A1
公开(公告)日：2021-08-05
申请号：US16780015
申请日：2020-02-03
IPC分类号： B60F1/04
摘要： Described is a multi-mode transportation system with roads and monorails, and vehicles that can transform to travel on either roads, or monorails, or on both simultaneously. Vehicles move in mode 1 on the roads using road wheels that roll over pavement. Vehicles in mode 2 move on the monorails and are supported by rail wheels in contact with a top of a monorail. In mode 2, the vehicle is supported by side cylinders that stabilize the vehicle on the monorail. Vehicles move in mode 3 with support from both roads and monorails simultaneously. Monorail mount locations simplify the vehicle's transition between modes. Pivoting or other mechanisms for road wheels, rail wheels, or side cylinders facilitate vehicle design. The vehicle can optionally be connected to the Internet, and be part of a traffic control system or operate autonomously. Small scale models or computer models of these vehicle can be used as toys, for product development, prototyping, animation, competitive games, entertainment, or for education.
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