Standard platinum resistance fixed point coagulation plateau recurrence automatic monitoring device

Abstract

The invention relates to a standard platinum resistance fixed point coagulation plateau recurrence automatic monitoring device, including a converter, a measurement circuit, an embedded computer and an alarming device. The monitoring device is connected with a standard platinum resistance thermometer placed in a fixed point device through the converter, and sends a measurement value into the embedded computer for achieving monitoring via the measurement circuit. The embedded computer comprises a curve generation unit and a storage unit, the curve generation unit generates a time-temperature curve according to the obtained measurement value, and the storage unit automatically records the temperature plateau maintenance time and the corresponding temperature point and automatically cuts out the temperature plateau curve. The embedded computer also comprises an increased temperature generation unit capable of calculating the increased temperature range, and an inflection point calculation unit capable of calculating the inflection point temperature value. The standard platinum resistance fixed point coagulation plateau recurrence automatic monitoring device achieves automatic monitoring of standard platinum resistance fixed point coagulation plateau recurrence.

Description

technical field [0001] The invention relates to the field of thermal engineering measurement, in particular to an automatic monitoring device for standard platinum resistance fixed-point coagulation plateau recurrence. Background technique [0002] The fixed point of the standard platinum resistance thermometer is an international practical temperature scale, and it is the main verification point used to divide the standard platinum resistance thermometer. [0003] The temperature plateau refers to a uniform temperature environment with stable temperature obtained by using the characteristics of the phase transition of a certain substance; obtaining the condensate plateau is a long and complicated process, which takes about 7 hours. The whole process is as follows: figure 1 As shown, the solidification temperature plateau refers to the flat part of the temperature versus time curve after reaching the desired fixed point, that is, figure 1 In the 5-6 section, it is very impo...

AI Technical Summary

Problems solved by technology

[0004] At present, the process of coagulation flat recurrence is usually monitored manually, and the operator needs to observe at all times, which not only increases the burden on the operator, but also inevitably has human errors, which may easily lead to coagulation failure.

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