To provide a load cell unit capable of satisfactorily weighing objects to be weighed even in the case where ambient temperature has changed and provide a weight sorting machine and an electronic balance using the load cell unit.
A strain body has a plurality of strain parts. Each strain gauge 41 is a temperature sensitivity compensating type gauge and arranged at a corresponding strain part. A bridge circuit 40 is made of the strain gauges 41. A zero-point compensating element 42 compensates for a zero point of the bridge circuit 40 according to the temperature of the strain body and roughly corrects output of the bridge circuit 40. A temperature-sensitive resistor 45 is a temperature sensor for detecting the temperature of the strain body. The zero-point compensating element 42 and the temperature-sensitive resistor 45 are provided for a thick-walled part between adjacent strain parts. A signal processing part 50 accurately corrects roughly corrected output of the bridge circuit 40. It is thereby possible to further apply software-based zero-point compensation to output of the bridge circuit 40 to which circuit-based zero-point compensation has been applied.
TAJIRI SACHIKO
TAKECHI SHINJI
| JPH1164123A | 1999-03-05 | |||
| JP2000111425A | 2000-04-21 | |||
| JPH11125555A | 1999-05-11 | |||
| JP2000241234A | 2000-09-08 | |||
| JPH02253130A | 1990-10-11 | |||
| JP3251081B2 | 2002-01-28 |
Yoshitake Hidetoshi
Takahiro Arita
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