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首页> 外文会议>International Conference on Control, Computing, Communication and Materials >Ultra high sensitive digital electromagnetic balance for measurement of weights in microgram: Design and experimentation
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Ultra high sensitive digital electromagnetic balance for measurement of weights in microgram: Design and experimentation

机译：微克测量重量的超高敏感数字电磁平衡：设计与实验

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This paper proposes design of a weight measurement system capable of measuring weight in the range of micrograms to milligrams. The configuration of the system resembles with a conventional straw balance. Unlike straw balance the proposed system employs a force overcome technique. It does not employ any spring as that in case of other types of electromagnetic balance and any vibrating element present in some of the micro-weight measurement technique. The measurement system is digitally controlled using a microcontroller with digital display of measurement. Due to the light weight and extremely low friction, the proposed system becomes the highly sensitive, which can respond to weights in microgram level. The design comprises of a thin aluminum wire as a straw which is suspended by a fine wire and bearing arrangement. A micro-weighing pan is attached to one tip of the wire and a small iron piece is connected to other tip of the wire beneath which a small electromagnet is placed. The unknown weight in micro-weighing pan exerts a force at its end which is overcome by the electromagnetic force exerted on the iron piece present at the other end. Thus the force required to overcome the counterforce exerted by the unknown weight becomes a measure of unknown weight. When the force is overcome the pan is lifted and sensed optically. The electromagnetic force is proportional to the electromagnetic coil current which is again proportional to the DAC output, and hence the digital input of the DAC becomes the measure of the unknown weight. The proposed system was designed and practically implemented for the realization.
机译：本文提出了一种体重测量系统的设计，其能够在微克范围内测量重量至毫克。系统的配置类似于传统的秸秆平衡。与秸秆平衡不同，所提出的系统采用了力量克服技术。在其他类型的电磁平衡和一些微量测量技术中存在的任何振动元件的情况下，它不采用任何春天。使用具有数字显示的微控制器进行数字控制测量系统。由于重量轻，摩擦极低，所提出的系统成为高度敏感的，可以响应微克水平的重量。该设计包括薄铝线​​作为吸管，其被精细导线和轴承装置悬挂。微量称重锅附着到导线的一个尖端，小铁件连接到下面的电线下方的电线的其他尖端。微量称重锅中的未知重量在其端部施加力，该力被施加在另一端存在的铁片上的电磁力克服。因此，克服未知重量施加的反作用力所需的力变为未知重量的量度。当克服力时，PAN被透光抬起并感测。电磁力与电磁线圈电流成比例，电磁线圈电流再次与DAC输出成比例，因此DAC的数字输入成为未知重量的量度。拟议的系统是为实现而设计的，实际实施。

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