Electronic scale comprising an inclinometer and corresponding signal evaluation method

US7906737B2 · kind B2 · utility

Assignee

• Sartorius AG · DE

Inventors

• Gerd Freydank · Oettingen, DE
• Winfried Graf · Göttingen, DE
• Christian Oldendorf · Oettingen, DE

Key dates

• Filing date: Jun 12, 2009
• Grant date: Mar 15, 2011
• Expiry date: Jun 12, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01G23/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19) and an inclinometer (40). The inclinometer derives a signal for the tilt of the scale from the difference of at least two signals. The digital signal processing unit (18) is provided with an additional circuit component or program routine that adds the two signals and, by way of this cumulative signal, corrects the vibration-distorted signal of the measuring sensor (1 . . . 16). A plurality of inclinometers enables the simultaneous detection of momentary gravitational acceleration. For example, in an electric bubble level, the gas bubble moves out of place when tilted and the diameter of the gas bubble changes when the gravitational acceleration changes. The scale thus provides an additional signal for correcting the influence of disturbances with minimum complexity.