计量学报2025，Vol.46Issue(3)：354-360,7.DOI:10.3969/j.issn.1000-1158.2025.03.07
微热电偶电解腐蚀法制作及响应特性研究
Fabrication and Study on the Response Characteristics of Micro-thermocouples Using Electrolytic Corrosion Method
摘要
Abstract
Reducing the diameter of the thermocouple's temperature-sensitive junction is an important method to improve the dynamic response characteristics of the thermocouple,but it is difficult to find finer thermos wires in actual fabrication.In order to further reduce the diameter of the thermos wires,the more stable E-type thermocouple wire(ϕ0.025 mm)was selected,and the diameter of the two metal wires was further reduced to about ϕ0.01 mm by electrolytic corrosion,and a micro-thermocouple with a temperature-sensitive junction size of about 0.02 mm was welded under a digital microscope.The time constants of micro-thermocouples and thermocouple made of 25 μm original thermos wires were measured by the temperature step method,and the reliability of the results was analyzed,the time constant of the thermocouple made of 25 μm original thermos wires is(30.06±1.16)ms,while the time constant of the micro-thermocouple is(11.62±1.02)ms,so the dynamic response characteristics of this by the method is significantly improved.The experiment also show that,the positive step response time of the micro-thermocouple is smaller than the negative step response time after the thermocouple temperature sensing junction is further reduced,and the uneven composition of the material after wire electrolysis can lead to changes in the thermoelectric potential of the micro-thermocouple.关键词
温度测量/微型热电偶/电解腐蚀法/感温结点直径/阶跃时间常数/动态响应特性Key words
temperature measurement/micro-thermocouples/electrolytic corrosion method/temperature sensing junction diameter/step response time/dynamic response characteristic引用本文复制引用
张剑鹏,王璐,王良璧..微热电偶电解腐蚀法制作及响应特性研究[J].计量学报,2025,46(3):354-360,7.基金项目
国家自然科学基金(52066009,51776093) （52066009,51776093）
甘肃省高等学校科技成果转化项目(18ZCILA007) （18ZCILA007）
高校科研创新平台重大培育项目(2024CXPT-13) （2024CXPT-13）
