Varför kan reducera termoodens diameter minska termisk tröghet på termoelementet?

De främsta orsakerna till att det är termoelementet att minska termoelementets diameter kan minska termoelementets termiska tröghet:
Reducing heat capacity: The heat capacity of the thermocouple is proportional to its volume, and the volume is proportional to the square of the diameter. When the diameter of the thermocouple is reduced, its volume decreases accordingly, and the heat capacity also decreases accordingly. This means that when the thermocouple absorbs or releases the same amount of heat, the temperature changes faster, and it can follow the Temperaturförändring av objektet mäts snabbare, vilket minskar termisk tröghet . till exempel, om termoelementets diameter reduceras från 1 . 5mm till 1 . 0mm, kommer volymen att reduceras avsevärt och värmekapaciteten kommer också att minska enligt. Vid mätningstemperatur kan den nå termisk jämvikt snabbare och förbättra svarshastigheten.
Shorten the heat transfer distance: The thermocouple with a smaller diameter shortens the distance that heat is transferred in it. When heat is transferred from the object being measured to various parts inside the thermocouple, the path is shorter and the transfer time is shorter. The thermocouple can sense the temperature change of the object being measured faster, and then generate the corresponding thermoelectric potential faster, reducing Termisk tröghet .
Increase the ratio of heat dissipation area to volume: After the diameter of the thermocouple is reduced, the ratio of its surface area to volume increases. This makes the heat exchange between the thermode and the object being measured more complete, and the heat can be transferred from the object being measured to the thermode more quickly. At the same time, the thermode can also dissipate the heat to the surrounding environment more quickly (when Värmeavledning krävs), vilket påskyndar upprättandet av termisk jämvikt och därmed minskar termisk tröghet .