Weighing scales – Structural installation – Vehicle
Patent
1992-12-10
1994-11-22
Miller, Jr., George H.
Weighing scales
Structural installation
Vehicle
G01G 1908
Patent
active
053660331
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a procedure for weighing a load as defined in the introductory part of claim 1 and to an apparatus for weighing a load as defined in the introductory part of claim 2.
Previously known load-weighing methods use strain gauge transducers in the weighing of vehicles, especially lorries and their loads. Systems and equipment of this kind are presented e.g. in the following patent publications: GB-1366084, GB-1559596, GB-2122748, GB-2178178, U.S. Pat. Nos. 3443652, 3780817, 3800895, 3978908, 3889765 and 4673047.
However, the procedures and equipment proposed in these publications have certain drawbacks. They are complex and expensive and very difficult to install on vehicles already in use as the transducers are placed on the axle and suspension assemblies. Due to this placement of the transducers, these weighing equipments are very susceptible to damage.
The object of the present invention is to eliminate the drawbacks mentioned. A specific object of the invention is to present a new type of load-weighing procedure and apparatus which is applicable for the measurement of the weights of the loads of stationary and/or movable vehicles, transport containers and equivalent resting on supporters, and of load supports in general, in such manner that the weighing system is easy and economical to install even on vehicles or corresponding load supports already in use.
The procedure of the invention is characterized by what is presented in claim 1.
The apparatus of the invention is characterized by what is presented in claim 2.
In the procedure of the invention, a load support such as a vehicle or container having supporters such as legs or wheels is provided with transducers and the weight of the load is determined from the signals given by the transducers. According to the invention, the transducers are mounted on the rigid frame of the load support near the fixing points of the supporters, and they are used to measure the deformations and/or stresses caused by the load, the weight of the load being determined on the basis of these.
In a preferred embodiment of the procedure, a vehicle is provided with transducers and the weight of the load is determined from the signals given by the transducers. According to the invention, the transducers are mounted on the rigid frame of the vehicle, near the fulcrum points between the axles and the frame, and they are used to measure the deformations and/or stresses caused by the load, the weight of the load being determined on the basis of these.
The apparatus of the invention for the weighing of a load, which is placed on a load support provided with supporters, comprises at least one transducer attached to the load support, and a processing unit for processing the signals obtained from the transducers so as to enable the weight of the load to be detected. According to the invention, the transducers are mounted on the rigid frame of the load support, especially in the immediate vicinity of the fixing points of the supporters, said transducers measuring the deformations and/or stresses produced in the frame by the load.
A preferred embodiment of the apparatus comprises at least one transducer attached to a vehicle, and a processing unit for processing the signals obtained from the transducers so as to enable the weight of the load to be indicated. In this preferred embodiment of the invention, the transducers are mounted on the frame of the vehicle, specifically in the immediate vicinity of the fixing points of the axle assemblies, said transducers measuring the deformations and/or stresses produced in the frame by the load.
In an embodiment of the apparatus, the transducers are preferably mounted on the frame girders of the load support, e.g. a lorry.
In an embodiment of the apparatus, at least two transducers are mounted in the vicinity of each fixing point, e.g. point of suspension.
In an embodiment of the apparatus, the transducers are placed around the fulcrum of a joint turnable in the frame of a trailer.
In an embodiment of the apparatus, the
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