Patent ID: 7929119
Filing Date: 2011-04-19
Classification: G01P,G01S

Abstract:
1. An image pickup device for detecting a moving speed of a shot object, comprising: a global positioning system (GPS) receiver, for obtaining a first longitude, a first latitude, and a first altitude at a first time point, and a third longitude, a third latitude, and a third altitude at a second time point; an image pickup module, for focusing on a shot object, so as to obtain a first focus distance at the first time point and a second focus distance at the second time point; an elevation measurement device, for measuring a first elevation angle and a second elevation angle respectively formed by the image pickup device for detecting a moving speed of a shot object with a horizontal direction at the first and the second time point; a north finder, for measuring a first horizontal angle and a second horizontal angle respectively formed by the image pickup device for detecting a moving speed of a shot object with a due north direction at the first and the second time point; and an operation unit, for calculating a second longitude, a second latitude, and a second altitude of a position of the shot object at the first time point according to the first longitude, the first latitude, the first altitude, the first focus distance, the first elevation angle, and the first horizontal angle, calculating a fourth longitude, a fourth latitude, and a fourth altitude of a position of the shot object at the second time point according to the third longitude, the third latitude, the third altitude, the second focus distance, the second elevation angle, and the second horizontal angle, calculating a moving distance of the shot object according to the second longitude, the second latitude, the second altitude, the fourth longitude, the fourth latitude, and the fourth altitude, and calculating a moving speed of the shot object in a time difference according to the time difference between the first time point and the second time point as well as the moving distance.