Title:
METHOD AND DEVICE FOR CALIBRATING WEIGHT METER
Document Type and Number:
Japanese Patent JP3494715
Kind Code:
B2
Abstract:
PURPOSE: To measure the spring constant, which changes with the lapse of time accurately and to perform calibration, in a device, in which a weight meter mounted on a vehicle measures the displacement of a spring used in the suspension of the vehicle and the weight of a mounted material is measured based on the spring constant of this spring.
CONSTITUTION: When a spring constant is calibrated, a frame 7 of a truck 1 is pulled down by a load device 11 comprising a hydraulic cylinder 12. Thus, the displacement of the spring is continuously changed, and the hysteresis loop in weight/displacement characteristics is obtained, The straight line passing the point, which divides the line segment formed by the intersection of the hysteresis loop and the straight line expressing the specified weight at a ratio of m:n, and an original point, imparts the spring constant after the change with the lapse of time. Since the ratio of m:n does not change with the lapse of time, the ratio can be obtained beforehand at the time of the shipment from the factory.
Inventors:
Masanori Shigemoto
Moriide Shigeki
Nobuo Sugamura
Moriide Shigeki
Nobuo Sugamura
Application Number:
JP26509594A
Publication Date:
February 09, 2004
Filing Date:
October 28, 1994
Export Citation:
Assignee:
Isuzu Motors Limited
Transtron Co., Ltd.
Transtron Co., Ltd.
International Classes:
G01G23/01; B60G17/00; G01G19/08; G01L25/00; (IPC1-7): G01G23/01; B60G17/00; G01G19/08; G01L25/00
Domestic Patent References:
| JP6294679A | ||||
| JP52102762A | ||||
| JP62195518A | ||||
| JP7260558A |
Attorney, Agent or Firm:
Shuji Moizumi