초록 ▼

A method and apparatus for determining the material flow rate of bulk material, transported by belt conveyers or the like, by continuously determining the contour of the free surface of the bulk material, at right angles to the direction of transport, via continuous non-contact distant measurement u

A method and apparatus for determining the material flow rate of bulk material, transported by belt conveyers or the like, by continuously determining the contour of the free surface of the bulk material, at right angles to the direction of transport, via continuous non-contact distant measurement using transmitter-receiver mechanisms coupled with a computer, and by computing the cross section of the bulk material. A precise and reliable measurement of the height of bulk material on the conveyer belt is achieved by using, as the transmitter-receiver mechanisms, respective laser distance-measuring devices which emit and receive a reflecting laser beam. These devices preferably operate pursuant to the pulse transit time measuring principle. The laser distance-measuring devices are accommodated in a housing.

대표청구항 ▼

A method of determining the material volumetric flow rate of bulk material transported by a conveyer mechanism of which speed is measured by impulse counters, said method including continuously determining the contour of the free surface of the bulk material, at right angles to the direction of tran

A method of determining the material volumetric flow rate of bulk material transported by a conveyer mechanism of which speed is measured by impulse counters, said method including continuously determining the contour of the free surface of the bulk material, at right angles to the direction of transport, by means of continuous non-contact distance measurement using at least one transmitter-receiver mechanism coupled with a computer, and computing the cross section per unit time of the bulk material; said method comprising the steps of: using as said transmitter-receiver mechanism at least two laser distance-measuring devices connected side by side for determination of irregular surface contour of the bulk material being conveyed which operate exclusively for distance measuring by using a pulse transit time measuring principle and which emit and receive reflecting laser beams for such distance measuring; directing said laser beams approximately at right angles to the direction of transport of said bulk mateiral having a cross section on said conveyor mechanism; and distributing several measuring points over the bulk material cross section and thus continuously ascertaining irregular surface contour of the bulk material transported by the conveyor mechanism in order to determine volumetric flow rate of the bulk material cross section collectively on the conveyor mechanism transverse to direction of movement thereof.