| 摘要 |
The proposed device for determining thermal conduction of materials contains a thermocouple, a voltage polarity switch, a differential amplifier, and additionally, an analog-to-digital converter with an input voltage signal, a digital-to-analog converter with an output voltage signal, a random access memory, a read-only memory unit, a microprocessor control unit, a digital display, a main electrode, an additional electrode, and an input voltage divider. The measuring junction of the thermocouple is connected to the additional electrode and the first input of the polarity switch. The output of the polarity switch is connected to the central terminal of the voltage divider. The input of the analog-to-digital converter is connected to the output of the differential amplifier. The outputs of the digital-to-analog converter are connected to the inputs of polarity switch. The control output of the polarity switch is connected to the output of the microprocessor control unit.
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