US 11,965,772 B2
Calibration device for weighing system
Haitao Zhang, Changzhou (CN); Chunhui Li, Changzhou (CN); Ping Zhang, Changzhou (CN); Chenggang Ding, Changzhou (CN); and Tom Leahy, Castelsarrasin (FR)
Assigned to Mettler Toledo Precision Instrument Company Limited, Changzhou (CN); Mettler Toledo Measurement Technology Company Limited, Changzhou (CN); and Mettler-Toledo International Trading (Shanghai) Co., Ltd., Shanghai (CN)
Appl. No. 17/265,560
Filed by Mettler Toledo Precision Instrument Company Limited, Changzhou (CN); Mettler Toledo Measurement Technology Company Limited, Changzhou (CN); and Mettler-Toledo International Trading (Shanghai) Co., Ltd., Shanghai (CN)
PCT Filed Jan. 23, 2019, PCT No. PCT/CN2019/072820
§ 371(c)(1), (2) Date Feb. 3, 2021,
PCT Pub. No. WO2020/057034, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 201811088894.9 (CN), filed on Sep. 18, 2018.
Prior Publication US 2021/0239514 A1, Aug. 5, 2021
Int. Cl. G01G 23/01 (2006.01); G01G 23/18 (2006.01)
CPC G01G 23/01 (2013.01) [G01G 23/18 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A device for calibrating a weighing system, the weighing system comprising a tank having, at a lower portion, a plurality of support legs, the calibration device comprising:
at least one calibration module, such that each calibration module is adapted at an upper end for fixed connection to an upper part of a corresponding one of the support legs and a lower end is adapted for fixed connection to a foundation;
a hydraulic system connected by a hose to each calibration module for applying a force to the tank;
a calibration terminal, connected to each of the at least one calibration modules for real time display of the force applied to the tank;
a calibration load cell in each calibration module for converting the applied force from the calibration module into an analog signal; and
at least one analog-to-digital (“A/D”) converter for converting the analog signal into a digital output signal;
wherein, for each calibration load cell, a corresponding:
one of the A/D converters is located at the calibration terminal for converting the analog signal and providing a digital output signal for processing at the calibration terminal;
one of the A/D converters is located at the calibration load cell for converting the analog signal and providing a digital output signal for processing at the calibration terminal; or
smart junction box is provided, having an A/D converter for each calibration load cell, for converting the analog signal received therefrom and providing a digital output signal per calibration load cell for processing at the calibration terminal.