Isothermal block for temperature measurement system using a thermocouple
    3.
    发明授权
    Isothermal block for temperature measurement system using a thermocouple 失效
    使用热电偶的温度测量系统的等温块

    公开(公告)号:US4718777A

    公开(公告)日:1988-01-12

    申请号:US834778

    申请日:1986-02-28

    IPC分类号: G01K7/12 G01K7/00

    CPC分类号: G01K7/12

    摘要: In a temperature measurement system using a thermocouple connected to a pair of circuit wires coupled to a voltmeter for providing an output reading, an isothermal block (48) formed of alumina ceramic contains a series of openings (58-66) in linear juxtaposition. Metal connectors (68) located in two of the openings to interconnect the thermocouple and printed circuit wires of a circuit board (52) establish a reference junction. A temperature sensor (50), preferably a transistor, in a third opening measures the temperature of the isothermal block (48) to compensate the output reading for error created by the reference junction. The connectors (68) are in resilient contact with the interior wall of the isothermal block (48) to maintain good heat conductivity between the connectors and the temperature sensor (50). Portions of the connectors (68) extending outside the isothermal block (48) retain the isothermal block (48) to the circuit board (52).

    摘要翻译: 在使用连接到耦合到电压表的一对电路线以提供输出读数的热电偶的温度测量系统中,由氧化铝陶瓷形成的等温块(48)包含一系列线性并置的开口(58-66)。 位于两个开口中以互连电路板(52)的热电偶和印刷电路线的金属连接器(68)建立参考连接点。 在第三开口中的温度传感器(50),优选晶体管,测量等温块(48)的温度以补偿由参考点产生的误差的输出读数。 连接器(68)与等温块(48)的内壁弹性接触,以在连接器和温度传感器(50)之间保持良好的导热性。 延伸到等温块(48)外部的连接器(68)的部分将等温块(48)保持到电路板(52)。