Patent ID: 7064281

Claim:
A combination weighing device for weighing respective groups of objects to determine a partial combination of the groups of objects having a total weight approximating to a target combination weight, said device comprising: a plurality of transport elements controlled in accordance with prescribed parameters to transport respective groups of objects; a transport quantity measuring element measuring weights of respective groups of objects transported by said plurality of transport elements; and a transport quantity control element controlling the plurality of transport elements via the prescribed parameters to control said weights of respective groups of objects, said transport quantity control element comprising: an operation element obtaining an average and standard deviation of weights of respective groups of objects corresponding to a prescribed frequency for each transport element on the basis of weights of respective groups of objects corresponding to said prescribed frequency measured by said transport quantity measuring element, and a parameter operation element determining said prescribed parameters on the basis of said average and said standard deviation of each transport element obtained by said operation element, said parameter operation element selecting one of at least two different computation techniques to determine the prescribed parameter of each transport element in response to said standard deviation obtained by said operation element.