Vehicle weighing in motion apparatus and method

Details Vehicle weighing in motion apparatus and method Vehicle weighing in motion apparatus and method

1989-12-08

1991-03-26

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

177 2514, 177134, 73 16, G01G 314, G01G 1316, G01G 1902, G01L 2500

Patent

active

050021419

ABSTRACT:
A weighing in motion (WIM) apparatus and method in which scale platforms are provided exhibiting a high rigidity selected to achieve a relatively high natural frequency response characteristic. These platforms are combined with instrumentation wherein load cell derived signal outputs are digitized at a conversion or sampling rate effective to permit an identification of amplitude data correlative to vehicle weight. In particular, the sampling rate is selected so as to isolate and detect peak amplitude output of the system which is directly correlatable to truck weight. The invention derives from a recognition that, during the dynamics of movement of a vehicle such as a truck over the rigid scale platform structures, there occurs a decoupling of the mass of the truck from the scale permitting its response to the weight of the truck without significant loss of natural frequency bandwidth. Through the use of a high speed processor such as a digital signal processor (DSP) essentially real time weight evaluations can be carried out.

REFERENCES:
patent: 4049069 (1977-09-01), Tamamura et al.
patent: 4539650 (1985-09-01), Griffin et al.
patent: 4701866 (1987-10-01), Harrison et al.
patent: 4804052 (1989-02-01), Griffen

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