The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2015
Filed:
Feb. 09, 2012
Karsten Zeiske, Celle, DE;
Karsten Zeiske, Celle, DE;
Panasonic Industrial Devices Europe GmbH, Lueneburg, DE;
Abstract
A device and a method for evaluating signals from load cells with strain gauges (SG), which require electronic signal evaluation with very low offset voltages due to the small output signal. In order to be able to use inexpensive components as well, two different operating points of the SG are set in two consecutive measurements, each being determined by a single voltage reference. The voltage in the zero branch of the bridge circuit of the SG is amplified in a differential amplifier and digitized with an ADC. In this context, the reference for the ADC is derived from the operating point of the SG that is determined by the respective voltage reference. The digitized offset and the initial value of the load cell are calculated from the two measurement values in an arithmetic logic unit.