DEVICE FOR WEIGHING RUNNING VEHICLE

• US 3,835,945 A
• Filed: 01/14/1974
• Issued: 09/17/1974
• Est. Priority Date: 03/12/1973
• Status: Expired due to Term

• Current Assignee: Masami Yamanaka, Yasutoshi Masuda
• Original Assignee: Masami Yamanaka, Yasutoshi Masuda
• Inventors: Yamanaka, Masami, Masuda, Yasutoshi
• Primary Examiner(s): Miller, Jr., George H.
• Application Number:
  US05/433,261
• Time in Patent Office: 246 Days
• Field of Search: 177/134,163,DIG.8
• US Class Current: 177/134
• CPC Class Codes: G01G 19/024 using electrical weight-sensitive devices
• CPC Class Codes: Y10S 177/08 RR motion

Abstract

A device for measuring the weight of a moving vehicle by measuring either the wheel load or axle load and avoiding inaccuracies due to vibration through the use of means for producing two signals proportioned to the downward force on the near and far edges of a platform as the wheel or wheels pass over it and then averaging the weight for a period initiated when the ratio of said signals has a first value and terminating when the ratio of said signals has a second value.

Claims

1. A device for weighing a moving vehicle, comprising a platform installed in the path of said vehicle, means for detecting loads applied by said vehicle to both ends portions of said platform along the moving direction as first and second electric signals, means fOr detecting the time period between a first time point at which the ratio of said first and second signals has a first predetermined value and a second time point at which said ratio has a second predetermined value, and means for averaging the sum of said pair of electric signals throughout said time period.

2. A device according to claim 1, wherein said time period detecting means comprises first and second comparators, said first comparator receiving said first electric signal at its first input and said second comparator receiving said second electric signal at its first input, means for supplying a part of said first electric signal to the second input of said second comparator and supplying a part of said second electric signal to the second input of said first comparator, and an AND circuit receiving the outputs of said first and second comparators at its first and second inputs.

3. A device according to claim 2, wherein said time period detecting means further comprises a third comparator receiving the sum of said first and second electric signals at its first input and a predetermined potential at its second input, the output of said third comparator being connected to the third input of said AND circuit.

4. A device according to claim 1, wherein said averaging means comprises an adder for summing up said first and second electric signals to produce a sum signal, an integrator for integrating said sum signal throughout said time period detected by said time period detecting means, a voltage generator for generating a voltage proportional to said time period, and an analog divider for dividing the output of said integrator by said voltage output from said voltage generator.