Object measuring and weighing apparatus and method for determining conveyance speed

• US 6,298,009 B1
• Filed: 05/16/2000
• Issued: 10/02/2001
• Est. Priority Date: 09/01/1989
• Status: Expired due to Fees

• Current Assignee: Quantronix Incorporated (Schneider Electric SE)
• Original Assignee: Quantronix Incorporated (Schneider Electric SE)
• Inventors: Stringer, Bradley J.
• Primary Examiner(s): Pihulic, Daniel T.
• Application Number:
  US09/572,027
• Time in Patent Office: 504 Days
• Field of Search: 367/99, 702/159, 702/156, 356/379, 356/380, 356/386
• US Class Current: 367/99
• CPC Class Codes: G01B 11/00 Measuring arrangements characterised by the use of optical techniques
• CPC Class Codes: G01B 11/002 for measuring two or more coordinates
• CPC Class Codes: G01B 11/04 specially adapted for measuring length or width of objects while moving
• CPC Class Codes: G01B 17/00 Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
• CPC Class Codes: G07B 2017/00685 Measuring the dimensions of mailpieces

Abstract

An apparatus and method for weighing and non-contact measuring of dimensions of a stationary object wherein the platen on which the object is placed for weighing and measuring is isolated from the support assembly for the dimension measuring sensors for greater sensitivity and accuracy in weight determination. A method of determining object speed of linearly in-motion object, useful for determining object dimensions, is also disclosed.

Claims

1. An apparatus for weighing and measuring an object, comprising:

a weighing device comprising a horizontal object support platen supported by at least one load cell; and

three transducers supported in isolation from the horizontal object support platen and aimed in substantially mutually perpendicular relationship to define a three-dimensional volume above the horizontal object support platen of greater extent in each dimension than that of a largest object to be measured, the three transducers each being configured to emit energy signals and to receive energy signals emitted after reflection from an object placed within the three-dimensional volume.

2. The apparatus of claim 1, wherein the three transducers are supported on a three-armed jig, each arm of the jig being substantially perpendicular to the other arms, the arms being joined proximate a common point, each transducer being supported by one of the arms and aimed in substantially parallel relationship thereto toward the common point.

3. The apparatus of claim 2, wherein two of the arms extend substantially horizontally and the third arm extends substantially vertically.

4. The apparatus of claim 3, wherein the horizontal object support platen is disposed between the two substantially horizontally extending arms.

5. The apparatus of claim 1, further including a processor for determining three dimensions of an object placed within the three-dimensional volume responsive at least in part to the energy signals emitted from the transducers and reflected from the object.

6. The apparatus of claim 5, wherein the processor is further adapted to compute a spatial volume of the object by multiplying the three determined dimensions thereof.

7. The apparatus of claim 1, wherein the transducers are selected from the group consisting of ultrasonic transducers and light transducers.

8. The apparatus of claim 1, wherein the three transducers are aimed at a common point above the horizontal object support platen.

9. A method for weighing and measuring an object, comprising:

supporting an object with an apparatus configured for determining a weight thereof; and

measuring a length, width and height of the supported object without application of weight to the apparatus supporting the object in a manner affecting the determination of the object weight.

10. A method for determination of speed of conveyance of a linearly transported object, comprising:

placing an object of known length on a conveying mechanism with the known length in parallel relationship to a direction of linear travel provided by the conveying mechanism;

conveying the object on the conveying mechanism at the speed to be determined;

measuring a time of passage of the object past a selected location while moving at the speed to be determined; and

determining the speed using the known object length and the measured time of passage.