Combination weighing system and method
First Claim
1. An automatic combinational weighing system comprisinga plurality of separate article batch handling means adapted to receive individual article batches, to measure weights of said received article batches, to output analog weight signals indicative of said measured weights and to selectively discharge said measured article batches in response to a discharge signal, anda control unit substantially consisting of a weight-monitoring section, a drive-control section and a main section,said weight-monitoring section including means to input said analog weight signals from said article batch handling means and a weight-monitoring central processing unit (CPU) which serves to constantly read digital signals corresponding to said analog weight signals and to detect stability of said article batch handling means by analyzing fluctuations in said weight signals,said drive-control section including driving means for driving said article batch handling means and a drive-control CPU which serves to control said driving means, andsaid main section including a main CPU for performing combinational calculations from said digital signals to select a combination of said article batch handling mans.
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Abstract
A combinational weighing system with a plurality of weighing devices employs at least three central processing units such as microprocessors. One keeps monitoring the weight information from the weighing devices and analyzes stability of weight data. Another one controls the charging and discharging of the weighing devices. The third performs combinational computation to select a combination. The system has increased flexibility regarding operation and adjustments, and allows efficient methods of zero-point and span adjustment of weighing devices. Its compact unitized input-output unit allows the user to operate the system interactively.
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Citations
8 Claims
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1. An automatic combinational weighing system comprising
a plurality of separate article batch handling means adapted to receive individual article batches, to measure weights of said received article batches, to output analog weight signals indicative of said measured weights and to selectively discharge said measured article batches in response to a discharge signal, and a control unit substantially consisting of a weight-monitoring section, a drive-control section and a main section, said weight-monitoring section including means to input said analog weight signals from said article batch handling means and a weight-monitoring central processing unit (CPU) which serves to constantly read digital signals corresponding to said analog weight signals and to detect stability of said article batch handling means by analyzing fluctuations in said weight signals, said drive-control section including driving means for driving said article batch handling means and a drive-control CPU which serves to control said driving means, and said main section including a main CPU for performing combinational calculations from said digital signals to select a combination of said article batch handling mans.
Specification