Transducer comprising strain gauges
AssigneeU.S. Philips Corporation
InventorGunther Friedrich Landvogt
Life of this patent
Estimating the term…
Abstract
A strain gauge or a bridge comprising four strain gauges is arranged on a support such that the strain gauge(s) is (are) situated in a neutral zone. The support is secured to the object to be measured on both ends, preferably by means of screws. Between the end portions which are screwed down and the central portion accommodating the strain gauges, the support has a zone of low bending rigidity. The support can be very readily manufactured from a strip of material whose longitudinal sides are flanged so that a U-shaped profile is obtained. Flanges can also be formed only at the centre near the strain gauges, so that the zones of low bending rigidity are automatically formed. The transducer is intended first of all to be fitted on shafts of existing lorries in order to measure the shaft load.
Claims9
A force-measuring transducer comprising, an elongate support member having a neutral zone in an area intermediate the ends of the support member at which substantially no tensile or compression forces occur when the support member is subjected to a bending force, at least one strain gage engaging a surface portion of the support member at said intermediate area of the support member, means located at both ends of the support member and outside said intermediate area for securing the support member to an object to be measured, said support member including first and second zones of lower bending rigidity than exists at said intermediate area and provided without a substantial reduction of the support member cross-section, said first and second zones being located respectively between the securing ends of the support member and said intermediate area at which the strain gage is positioned.
Dependencies are inferred from the claim text.