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

An apparatus has at least one communication component for transmitting or receiving at least one set of signals to or from at least one location, each of the set of signals having a Radio Frequency (RF) signal and an acoustic signal. The apparatus also has at least one processing unit for calculating a temperature-adjusted speed of the acoustic signal by using a predefined temperature value, and detennining a distance between the apparatus and the at least one location at least based on a time-of-arrival of the RF signal and a time-of-arrival of the acoustic signal, a speed of the RF signal, and the temperature-adjusted speed of the acoustic signal.

Abstract

A method for detennining the distance between a first device and a second device, the method has the steps of: transmitting a RF signal and an acoustic signal from the first device, said acoustic signal having a first codeword; receiving the RF signal by the second device at a first time; starting to receive the acoustic signal by the second device at a second time; receiving the acoustic signal by the second device; processing the received acoustic signal to obtain a received and processed acoustic signal having the first codeword; deteimining a time offset based on the received and processed acoustic signal; detennining a time difference as the summation of the second time and the time offset minus the first time; and detennining the distance between the first and the second devices based on the time difference.

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 finnware 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.

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