Patent ID: 8654608

Claim:
A measuring apparatus for use with excavating and earth moving equipment, said excavating and earth moving equipment comprising: the components: a boom; a stick; a stick extension; and a bucket, said components being moveable in relationship to each other and the ground; and an ultrasound transmitter and receivers, for measuring the position of the stick-bucket joint with respect to the boom-stick joint, wherein: the stick is provided with an ultrasound transmitter; a first sensor in the form of an inclination sensor for providing an output signal representing the inclination of the stick with respect to a reference, that the stick extension is provided with a second sensor in the form of an ultrasound receiver providing a signal that is delayed by the instant distance from said ultrasound transmitter; and said signals are transmitted to a signal processor provided with a memory for calibration values obtained at any time after installation of said measuring apparatus, said signal processor providing an output representative of the stick-bucket joint position.