Coal seam sensor
First Claim
Patent Images
1. A horizon control sensor for a coal mining machine having at least one support arm on which is mounted a rotatable cutting tool, comprising:
- at least one vibration transducer mounted on the support arm to sense the sonic vibrations of the rotatable cutting tool and generate an electrical signal representative thereof,filter means for extracting from said vibration signal at least one narrow band of frequencies at and near a preselected resonant frequency of the cutting tool, andsignal processing means for deriving from an extracted resonant peak a discriminant for distinguishing engagement of the cutting tool with the interface between coal and rock and other coal seam enclosing materials.
3 Assignments
0 Petitions
Accused Products
Abstract
The frequency response of the cutting tool of a coal mining machine is monitored at a resonant frequency of the cutting tool, using a vibration transducer mounted on a non-rotating support arm, to detect the difference between coal and rock or other enclosing material. The horizon control sensor maintains the mining machine within the undulating coal seam.
37 Citations
4 Claims
-
1. A horizon control sensor for a coal mining machine having at least one support arm on which is mounted a rotatable cutting tool, comprising:
-
at least one vibration transducer mounted on the support arm to sense the sonic vibrations of the rotatable cutting tool and generate an electrical signal representative thereof, filter means for extracting from said vibration signal at least one narrow band of frequencies at and near a preselected resonant frequency of the cutting tool, and signal processing means for deriving from an extracted resonant peak a discriminant for distinguishing engagement of the cutting tool with the interface between coal and rock and other coal seam enclosing materials. - View Dependent Claims (2, 3, 4)
-
Specification