Electronic level and process for video sighting

US6237235A · kind A · utility

Assignee

• Carl Zeiss Jena GmbH · DE

Inventors

• Wieland Feist · Jena, DE
• Ludwin Monz · Mainz, DE
• Michael Kaschke · Oberkochen, DE

Key dates

• Filing date: Jul 9, 1999
• Grant date: May 29, 2001
• Expiry date: Jul 9, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C15/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electronic level comprising a clinometer, an image receiving device having a telescope with an objective and with a CCD receiver matrix and with a screen for displaying the image of a graduated staff which is set up at a target and provided with a coded graduation. A vertical axis is rotatable about the level. A leveling device is included for alignment and rough leveling of the level with respect to the graduated staff. An input unit is provided for entering measurement data. A power supply unit and a computer is included for processing the measurement data, calculating measurement values and for image evaluation. The image receiving device comprises a CCD receiver matrix which is preferably operated in video clock. The objective or the CCD receiver matrix is arranged in a fixed position relative to the vertical axis, and objective and CCD receiver matrix are adjustable relative to one another, and the clinometer is assigned in a fixed manner for measuring the deviation of the position of a sighting axis relative to the horizon, wherein the sighting axis is formed by a center pixel of the CCD receiver matrix.