Abstract
“Dynamic Mass-Measurement System of Displacement and Velocity Sensing-Type” (DMS-DV) consists of a spring scale, a microcomputer, and displacement and velocity sensors. In the system, to obtain the mass value of the goods very quickly in comparison with a conventional spring scale, the displacement and velocity data of the goods-plate of spring scale are data-processed in real-time by means of the software on mincrocomputer.
It also is an example of the software-oriented approaches based on the dynamic measurement method to meet the two contradictory requirements, “Quickness” and “Precision”.
The feasibility of the DMS-DV has already been confirmed through the theoretical analysis, the computer simulation and the experiment using the test system.
This paper describes the software which plays an important role in the utility of the DMS-DV.
Firstly, the modified version of a dynamic mass-estimation algorithm has been presented to shorten a measurement time. Secondly, the software system has been supplemented to the DMS-DV to support its operation and to meet “Usability” as well as the above two requirements.
In case of the previous algorithm, accuracy of the measured value depends on the displacement data rather than on the velocity data. So smoothing of the velocity data by software and its positive utilization have made the present algorithm possible to shorten the measurement time within 2/3 of that which is achieved by means of the previous algorithm.
Moreover, the DMS-DV has become usable by means of the software system to support the determination, management, and renewal of the parameters and conditions for execusion of the algorithm, and to assist the record and storage of the measured value.
