Patent ID: 8806963

Claim:
A measuring device for ascertaining a torque acting on an axis of a robot, the measuring device comprising: a first device generating a first analog electrical signal related to the torque; a first analog-digital converter receiving the first analog electrical signal and generating a first digital signal related to the torque in response thereto; a first digital evaluating device communicating with the first analog-digital converter and ascertaining the torque in response to the first digital signal; a second device generating a second analog electrical signal related to the torque; a second analog-digital converter receiving the second analog electrical signal and generating a second digital signal related to the torque in response thereto; a second digital evaluating device communicating with the second analog-digital converter and ascertaining the torque in response to the second digital signal independently of the first digital evaluating device; a first electrical voltage source comprising a first digital-analog converter producing a first reference voltage that is communicated to the second device; and a second electrical voltage source comprising a second digital-analog converter producing a second reference voltage that is communicated to the first device, wherein at least one of: the first digital evaluating device is connected to the first digital-analog converter and sets the value of the first reference voltage produced by the first digital-analog converter, or the first digital evaluating device is connected to the second digital-analog converter and sets the value of the second reference voltage produced by the second digital-analog converter.