Digital type curve recorder

Abstract

Abstract PURPOSE:To facilitate reproduction of results of measuring a moving curve by continuously calculating coordinates of moving points with automatic measurement of information on moving direction and moving distance to select and memorize those only necessary for the reproduction of the moving curve with direction changes as parameter. CONSTITUTION:Two magnetic sensors 3 are used to measure the component of the earth magnetism in the on-going direction and that in the orthogonal direction respectively. Assuming that the on-going direction of a person is at theta to the direction of the (x) axis, outputs of the two sensors are Costheta and Sintheta respectively. A foot switch 5 is provided to generate a switching signal each time one step is taken. The switching signal is introduced into a microcomputer 6 with a bearing signal. Components in the direction of (x) axis and (y) axis are integrated at each switching signal with the microcomputer 6 to always calculate the current position automatically. Since the angle of bearing is always calculated, coordinates necessary for reproduction of the walking route is automatically selected with changes in as parameter and memorized into a memory. They are displayed on an XY display board 8 as required thereby facilitating the reproduction of results of measuring the moving curve.

Inventors

• 👤 Takao Yamaguchi
• 👤 山口　隆男
• 👤 Michiko Matsuda
• 👤 松田　三知子

Bibliographic Details