Abstract

An object-positioning system has a plurality of reference devices, one or more target devices at unknown positions and in communication with the plurality of reference devices via one or more wireless signal sets, at least one processing unit; and one or more signal-retransmission devices each in communication with at least a subset of the plurality of reference devices, at least a subset of the one or more target devices, and at least a subset of the at least one processing unit for populating object-positioning related data therebetween. The at least one processing unit is configured for: for each of the one or more target devices, determining the distance between the target device and each of the plurality of reference devices based on the wireless signal set communicated between said reference and target devices, and determining the position of said target device based on the determined distances.

IPC Classes  ?

• G01S 5/00 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations

Abstract

A range-finding and/or object-positioning system comprises one or more target devices; one or more reference devices communicating with said one or more target devices via one or more wireless signal sets, each wireless signal set comprising at least a first-speed signal having a first transmission speed and a second-speed signal having a second transmission speed, and the first transmission speed being higher than the second transmission speed; and at least one processing unit performing actions for determining at least one distance between one target device and one reference device based on the time difference between the receiving time of the first-speed signal and the receiving time of the second-speed signal of the wireless signal set communicated between said reference and target devices.

IPC Classes  ?

• G01S 11/16 - Systems for determining distance or velocity not using reflection or reradiation using difference in transit time between electromagnetic and sonic waves

Abstract

A 3D input system and an angle encoder are disclosed. The 3D input system comprises a computing device and one or more position sensing gloves. The position sensing glove comprises a plurality of angle encoders each installed thereon at a location about a finger joint. An inertial measurement unit (IMU) is installed on the glove. A firmware uses data from the angle encoders and IMU to calculate fingertip positions in a 3D space. The firmware generates keystrokes on a virtual keyboard based on the fingertip positions. The angle encoder comprises a first and a second components rotatable with respect to each other, and an encoder pattern comprising codewords for indicating the angle between the first and second components. The encoder pattern comprises a set of base encoder channels coded with a conventional Gray code, and a set of Booster channels for improving the resolution of angle measurement.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer

Abstract

An angle encoder is disclosed. The angle encoder has first and second components rotatable with respect to each other, and an encoder pattern comprising codewords for indicating the angle between the first and second components. The encoder pattern comprises a set of base encoder channels coded with a conventional Gray code, and a set of Booster channels for improving the resolution of angle measurement.

IPC Classes  ?

• H03M 7/16 - Conversion to or from unit-distance codes, e.g. Gray code, reflected binary code
• G01B 21/22 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for testing the alignment of axes
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• H03K 19/20 - Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits