Abstract
The measuring system described can be used to record measured signals of not too high a limit frequency. To enable documentation or further processing of these signals, after analogue and digital preprocessing near the sensor, compressed storage of the signal parts containing features of interest can take place. Flexible within broad limits, the four-channel system permits long-term mobile data recording of an average of 10 sampled values per second with a resolution of 8 bits per channel. In the short term, 200 sampled values per second can be stored with the same resolution. The system is equipped with interfaces for magnetic tape recording, radio transmission and for data transfer to large computers. All measured values regarded as worthy of recording are labelled with the absolute time. This is automatically assigned to the measured value in the appropriate code by receiving and processing the signals from the DCF 77 time signal transmitter, and permits reconstruction that is true to time even where recording is non-equidistant. The system has proved itself in practical use for recording biosignals and for storing events. A long-term application is demonstrated by way of the example of mobile measurements of the physiological parameter skin resistance.
Published Version
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