Discom Software

Software for acoustical quality analysis

Rotas System Elements

The Rotas software suite is a complete set of tools for the measurement and analysis of mechanical assemblies by acoustical means. In addition to an unique multi-channel measurement system, a parameter database and a set of data storage and programs form a complete application for high volume, end-of-line quality analysis tasks.

The main components of this software suite and their interaction is presented below.

Measurement system TasAlyser

TasAlyser online test display

The TasAlyser is the data analysis part of the Rotas system. It controls the USB based TAS08 data acquisition frontend, processes the signals, extracts problem specific data and evaluates them against a set of limit values.

The data analysis and evaluation parameters are extracted from a parameter database (see below). The measurement results are stored in measurement archive files which are collected into a result database. In addition to these processed data, a wave file with the original sensor input is stored. This file also holds test cycle information like serial numbers and test steps. This allows for a later complete replay of the test run and re-analysis of the data from the wave file alone.

The TasAlyser application operates on a Discom supplied computer integrated into the test stand. Sensor signals and a command interface like a serial RS232 line make it a self-contained and easy to integrate component of the end-of-line test. The result database can both be stored locally or on a central server. Both options support remote data analysis over a network.

The Parameter Database

The parameter database

To control the measurement program, a central parameter database holds kinematic data of the unit under test like number of teeth for a transmission. In addition, the measurement recipe is specified here, including a variety of parameters from order resolution details to specifications for time and spectral domain software instruments.

The parameter database gives an easy-to-use interface into this multitude of parameters that allows to control transmissions models and test stands with minimal effort.

Data Analysis Marvis

Marvis

Marvis displays the data stored in the measurement archives. Via special macros, it displays single values, spectra, order tracks, spectrograms and other data in a user-configurable way in pages, that again are user configurable.

Marvis can either open measurement archives directly or driven by information from the the result database. It can also be activated by archives that are downloaded via the intranet based tool WebPal. Marvis is installable on a workgroup PC and will then operate both locally as well as via an intranet connection to the database server.

Intranet Evaluation WebPal

Defect statistics in WebPal

WebPal is a browser-based analysis tool, that features a set of easy-to-use production analysis modules without requiring a software installation on the user's computer.

WebPal operates on the result database and shows part and reject counts, test reports, TOP-N reject analysis and single value time history data. In combination with Marvis, selected measurements can be downloaded and fed into the curve analysis tool.

Auxiliary Components

To integrate the Rotas software parts, there are further auxiliary components like the Collector Service, a tool that collects measurement archives, forms larger files from them and then indexes the content for fast and efficient operation of the SQL server result database.