US Patent No. 10,655,285

SELF-PROPELLED GROUND MILLING MACHINE AND METHOD FOR WORKING ON A TRAFFIC SURFACE


Patent No. 10,655,285
Issue Date May 19, 2020
Title Self-propelled Ground Milling Machine And Method For Working On A Traffic Surface
Inventorship Christian Berning, Zulpich (DE)
Philip Verhaelen, Cologne (DE)
Cyrus Barimani, Konigswinter (DE)
Assignee Wirtgen GmbH, (DE)

Claim of US Patent No. 10,655,285

1. A method for working a traffic surface using a self-propelled ground milling machine, wherein the machine comprises a working roller arranged in a roller housing, a hold-down device which is height-adjustable with respect to the traffic surface being arranged upstream of the working roller in a working direction, a control unit, and one or more sensors, the method comprising:detecting, via the one or more sensors, one or more of impacts and oscillations which occur as a result of fragments broken off from the traffic surface;
detecting a disruption to the operating process based on at least one of:
a) a magnitude of an amplitude of the one or more of impacts and oscillations is greater than a predetermined threshold;
b) a frequency of at least one of the detected impacts and/or oscillations falls within a particular frequency range; and
upon detecting the disruption to the operating process, generating a control signal to the control unit.