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Difference between revisions of "Coriolis Weighers"
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[[File:Coriolis weighers.png|thumb|right|Coriolis Weighers]] | |||
'''Coriolis Weigher''', Coriolis Scale, Coriolis Flow Weigher or Rotor Weigher is a scale which measures the weight of a mass flow by utilizing the Coriolis effect. Products measured by the coriolis weigher are bulk materials, dust , powder and flour, also granules and grain. The coriolis weigher should not be confused with a coriolis flow meter, which measures mass of liquids and gases. | '''Coriolis Weigher''', Coriolis Scale, Coriolis Flow Weigher or Rotor Weigher is a scale which measures the weight of a mass flow by utilizing the Coriolis effect. Products measured by the coriolis weigher are bulk materials, dust , powder and flour, also granules and grain. The coriolis weigher should not be confused with a coriolis flow meter, which measures mass of liquids and gases. | ||
==Design== | ==Design== | ||
The coriolis weigher consists schematically of a feed pipe, a motor which drives a rotor plate and a discharge funnel. There are different construction types in particular concerning the feeding configuration and the rotor plate. The construction in principle is yet comparable with the one which is shown on the picture. | The coriolis weigher consists schematically of a feed pipe, a motor which drives a rotor plate and a discharge funnel. There are different construction types in particular concerning the feeding configuration and the rotor plate. The construction in principle is yet comparable with the one which is shown on the picture. | ||
==Function== | ==Function== | ||
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There are different method of measuring the torque.One method is to measure the current consumed by the motor. Due to the influence of loss and perturbation this method is inaccurate. | There are different method of measuring the torque.One method is to measure the current consumed by the motor. Due to the influence of loss and perturbation this method is inaccurate. | ||
Another method is to place the motor in a commuting bearing. The resulting force affecting the motor is measured by a strain gauge. The torque is measured directly. Friction of the bearing go into measurement as error. Thats why this method is qualified for mass flows of more than approx. 1 t/h.A further method is capable of avoiding friction influence by a precise suspension and abandonment of bearings and strain gauge. Thereby it is possible to weigh mass flows far below 1 t/h precisely. | Another method is to place the motor in a commuting bearing. The resulting force affecting the motor is measured by a strain gauge. The torque is measured directly. Friction of the bearing go into measurement as error. Thats why this method is qualified for mass flows of more than approx. 1 t/h.A further method is capable of avoiding friction influence by a precise suspension and abandonment of bearings and strain gauge. Thereby it is possible to weigh mass flows far below 1 t/h precisely. | ||
==Advantages== | ==Advantages== | ||
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==Sources== | ==Sources== | ||
[http://en.wikipedia.org/wiki/User:Jof307/CoriolisWeigher Wikipedia Coriolis Weighers] | [http://en.wikipedia.org/wiki/User:Jof307/CoriolisWeigher Wikipedia Coriolis Weighers] | ||