Apparatus and method for detecting a velocity of a moving object
US5771485A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Apr 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An apparatus for detecting a velocity of a moving object includes: a camera for photographing a predetermined area in which the object moves, at intervals of time T; a projector for projecting brightness information of each pixel in an image photographed at the intervals of time T by the camera, onto a longitudinal axis along a moving direction of the object, and for accumulating each brightness value on the longitudinal axis to generate pieces of one-dimensional projected information; a buffer for storing the pieces of one-dimensional projected information from the camera; and a detector for determining the velocity of the object moving in the predetermined area from the pieces of one-dimensional projected information stored in the buffer. Information to be processed becomes one-dimensional projected information, so even if there are a large number of pieces of one-dimensional projected information, they will be nearly the same as an amount of information of an image photographed at intervals of time T. Accordingly, information can be processed simply and a velocity can be detected accurately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.