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Engineering transport vehicle load is generally adopted to balance the weighing method to control, but so far, in practical engineering, the majority of occasions because of cost and construction conditions of installation will not be used to scale, so can't forcefully to overload control of vehicles, engineering the overload vehicles on urban roads caused significant damage. In order to put an end to happen the overload phenomenon, an effective way is in the process of loading and unloading of cargo weight control. This topic USES the strain sensor, the method of excavator cantilever beam with collection every time the weight of the loading and unloading of the goods value, through the control of the total weight, make each loaded in line with the rated load of transport vehicle, to avoid the overload of vehicles in transit. As a result, the design of excavator overload alarm system installation and research has important practical application value. This design AT89S52 as the core design, based on the strain type sensor, detection circuit design weight. Will detect the pressure signal after A/D conversion, into single chip microcomputer system for data analysis and processing, to detect the cumulative weight value and set value, alarm indicator, to provide reference for loading of the operator.
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