Abstract:
An electric wheelchair, a control method thereof and a control system thereof are provided. The control method includes the following steps. Firstly, a control signal is outputted to the electric wheelchair by way of wireless according to a posture of a handheld controller. Then, the electric wheelchair performs a corresponding motion according to the control signal.
Abstract:
A parking guidance system and method and an automatic parking system. The method includes: detecting corners of a marked parking space; planning a vehicle's parking path based on the corners; and providing parking guidance based on the parking path. The planned parking path includes: a first straight path the vehicle will travel straight to a first turning point; a first turning path the vehicle will turn a first angle from the first turning point along the circumference of a first turning circle; a second straight path the vehicle will travel from the end point of the first turning path to a second turning point; a second turning path the vehicle will turn a second angle from the second turning point along the circumference of a second turning circle; and an intra-parking-space path the vehicle will travel from the end point of the second turning point to a stop point.
Abstract:
A crankshaft rotating angle controlling method and a crankshaft rotating angle controlling system are provided. A shut-off signal is obtained, and an engine speed is judged. If the engine speed is lower than a specific value, a generator is set in a driving mode at an ending point of a missing tooth signal in a gear pulse signal, such that the generator in the driving mode drives a crankshaft to exceed a top-dead-center of a cylinder. When the crankshaft arrives at a bottom-dead-center of the cylinder, the generator is set to be in a holding mode of an error phase of a three-phase current. Through the generator in the driving mode, the given error phase of the three-phase current stops the generator immediately and the crankshaft is fixed within an angle range of a default stop position.
Abstract:
An output control apparatus of a motor includes a controller formed by having a power device to bridge a motor and a power supply. The controller incorporating the power device provides voltage control modulation during different motor speeds so as to fix the recharging voltage at the DC bus in a specific range without involvement of any voltage converter. It is unnecessary to use additional complex circuits or other DC/DC converters to reduce the voltage recharged from the motor running at a high speed. In addition, space for the apparatus is reduced, and the specification and function of the original controller can be maintained without trading off work in redesigning the motor system.
Abstract:
A marked parking space identification system and a marked parking space identification method are disclosed. The marked parking space identification method includes: receiving a first image of a first parking space with markings; identifying a plurality of corners in the first image of the first parking space with markings; pairing up two adjacent corners to become a parking corner group; and using the parking corner group to identify a first marked parking space.
Abstract:
A parking guidance system and method and an automatic parking system. The method includes: detecting corners of a marked parking space; planning a vehicle's parking path based on the corners; and providing parking guidance based on the parking path. The planned parking path includes: a first straight path the vehicle will travel straight to a first turning point; a first turning path the vehicle will turn a first angle from the first turning point along the circumference of a first turning circle; a second straight path the vehicle will travel from the end point of the first turning path to a second turning point; a second turning path the vehicle will turn a second angle from the second turning point along the circumference of a second turning circle; and an intra-parking-space path the vehicle will travel from the end point of the second turning point to a stop point.
Abstract:
A navigation and positioning device including a storage, a mark feature analyzer, a first coordinate fusion component and a second coordinate fusion component is provided. The storage stores map information including a traffic mark feature and its mark coordinate. The mark feature analyzer is used for analyzing whether a captured image has the traffic mark feature. When the captured image has the traffic mark feature, the mark feature analyzer analyzes the traffic mark feature in the captured image and calculates a device coordinate according to the mark coordinate. The first coordinate fusion component fuses the device coordinate and a first fusion coordinate and uses fused coordinate as a second fusion coordinate. The second coordinate fusion component fuses the second fusion coordinate, traffic carrier inertial information and a global positioning coordinate and uses fused coordinate as an updated first fusion coordinate.