Electromagnetic-type load weighing apparatus

• US 5,243,146 A
• Filed: 01/28/1992
• Issued: 09/07/1993
• Est. Priority Date: 01/29/1991
• Status: Expired due to Fees

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Nishitani, Katsuo
• Primary Examiner(s): Fuller, Benjamin R.
• Assistant Examiner(s): Gibson, Randy W.
• Application Number:
  US07/826,976
• Time in Patent Office: 588 Days
• Field of Search: 177/136, 177/139, 177/210 R, 177/210 EM, 177/211
• US Class Current: 177/136
• CPC Class Codes: G01G 19/08 for incorporation in vehicles
• CPC Class Codes: G01G 7/02 by electromagnetic action

Abstract

A load weighing apparatus for weighing a weight of a load on a vehicle comprises an intervening element provided between a body frame and a suspension for transmitting the weight of the load to the suspension from the body frame. The intervening element is formed of a magnetic material and has a plurality of bore sections. An excitation winding is wound about the intervening element through ones of the bore sections, while a measurement winding is wound about the intervening element through the remaining bore sections. An electric power source for applying voltage is connected to the excitation winding. A measuring unit for measuring voltage across the measurement winding is connected thereto.

Claims

1. A load weighing apparatus for weighing a load weight on a vehicle, said apparatus comprising:

an intervening element provided between a vehicle body frame and a suspension attached to an axle for transmitting the weight of the load to said suspension from said body frame, said intervening element being formed of a magnetic material and having a plurality of bore sections;

an excitation winding wound about said intervening element through one of said bore sections;

a measurement winding wound about said intervening element through another one of said bore sections and producing a voltage through a change in permeability of said intervening element when a load is applied to said intervening element from the body frame and the suspension; and

an electric power source for applying voltage to said excitation winding;

wherein said excitation winding and said measurement winding are wound in directions extending perpendicularly to each other.

2. A load weighing apparatus according to claim 1, further including a measuring unit for measuring voltage across said measurement winding.

3. A load weighing apparatus according to claim 1, wherein said intervening element is integrally formed with a bracket of said suspension.

4. A load weighing apparatus according to claim 1, wherein said intervening element is supported between at least a pair of bracket elements.

5. A load weighing apparatus for weighing a load weight on a vehicle, said apparatus comprising:

a first intervening element provided between a vehicle body frame and a front suspension attached to a front axle and a second intervening element provided between said body frame and a rear suspension attached to a rear axle, respectively, for transmitting the weight of the load to said front and rear suspensions from said body frame, each of said intervening elements being formed of a magnetic material and having a plurality of bore sections;

an excitation winding wound about each of said intervening elements through each respective bore section;

a measurement winding wound about each of said intervening elements through each respective remaining bore section, and producing a voltage through a change in permeability of said intervening elements when a load is applied to said intervening elements from the body frame and the suspension;

an electric power source for applying voltage to said excitation windings; and

a measuring unit for measuring voltage across said measurement windings and synthesizing the measured voltage;

wherein said excitation windings and said measurement windings are wound in directions extending perpendicular to each other.