Weighing scales – Structural installation – Vehicle
Patent
1992-04-16
1993-07-27
Miller, Jr., George H.
Weighing scales
Structural installation
Vehicle
73782, 338 6, G01G 1908, G01L 122, G01B 716
Patent
active
052303926
ABSTRACT:
A weighing apparatus is put forward for weighing a load carried by a load support provided with front and rear wheel assemblies each having at least one member which deforms as a result of the load. The apparatus comprises a plurality of strain transducers to be affixed respectively to the members. Each of the transducers includes a pair of spaced apart brackets to be fixedly secured to the corresponding member such that their upper ends come closer to one another when the corresponding member is deformed, and an elongated load cell having opposite ends attached respectively to the upper ends of the brackets. The load cell is provided with strain sensing elements for producing an electrical strain signal indicative of a strain variation substantially along a longitudinal axis of the load cell. The apparatus also comprises a processing unit having inputs for receiving the strain signals of each of the strain sensing elements, a microcontroller for processing signals derived from the strain signals and determining thereof the load and parts of the load supported by each of the wheel assemblies, and a display unit connected to the microcontroller for displaying the determined load measures. Each of the load cells is initially subjected to a predetermined longitudinal strain when the load support is empty. When the load support is loaded, the members deform as a result of the load, bringing closer the upper ends of the pairs of brackets to one another, thereby reducing the longitudinal strain in the corresponding load cells such that the processing unit can determine and display the load and the parts of the load supported by each of the wheel assemblies.
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