Title: Photoelectric method and device for control of a mining machine along a bed of mineral

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Abstract: A photoelectric method of automatically controlling motion of a mining machine along a profile of a bed of a mineral deposit is described. A section of a face having at least two beds having different colors is illuminated. The reflected light flux is detected and the beds are distinguished by their colors. The boundary of the selected beds is tracked by identifying their color. The light flux reflected from each of said beds is converted into an electric signal by means of a photoelectric receiver. The direction of deviation of the mining machine with respect to the boundary of the selected beds is determined and the motion of the machine is corrected correspondingly. The device for effecting the proposed method includes a light source, an objective and a photoelectric receiver for conversion of the reflected light flux into electric signals. Located between the objective and the photoelectric receiver is a scanner unit for scanning the reflected light fluxes. Connected to the photoelectric receiver is a unit for separating electric pulses. The device is provided with a synchronizer connected to the scanner unit and the unit for separating the electric pulses, which provides simultaneous operation of these units. The output of the signal separating unit is connected to a unit for operative storage and comparison of pulses whose output is connected to a comparator unit to compare the obtained difference of the pulse parameters with a value specified for the given beds. The comparator unit is connected to an actuating member to move the objective, which is connected to the unit for measuring the value of deviation of the mining, machine, which, in turn, is connected to a unit for comparing the value of deviation of the machine with a specified allowance for accuracy of guiding the machine. The unit for comparing the value of deviation with the specified allowance for accuracy of guiding the machine is connected to a unit for shaping control signals to control the motion of the machine.


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