公开(公告)号：US3678247A

公开(公告)日：1972-07-18

申请号：US3678247D

申请日：1971-04-19

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SAWA KENNETH B ,  BLEAK THOMAS M

IPC: G05D23/24 ,  H05B1/02

CPC classification number: G05D23/24 ,  G05D23/1913

Abstract: A temperature sensing circuit generates a voltage proportional to the difference between a controlled temperature and a predetermined reference temperature. The voltage is integrated in an integrating amplifier whereby average temperature offset error is reduced to zero. The integrated voltage is compared to a reference potential in a comparator to generate a control signal when the integrated voltage exceeds the reference potential. The control signal operates a switching device through which electrical power is conducted to a heater whereby the controlled temperature is established.

Abstract translation: 温度感测电路产生与受控温度和预定参考温度之间的差成比例的电压。 电压集成在积分放大器中，从而平均温度偏移误差减小到零。 将积分电压与比较器中的参考电位进行比较，以在积分电压超过参考电位时产生控制信号。 控制信号操作开关装置，通过该开关装置将电力传导到加热器，由此建立受控温度。

公开(公告)号：US3518179A

公开(公告)日：1970-06-30

申请号：US3518179D

申请日：1968-03-11

Applicant: BECKMAN INSTRUMENTS INC

Inventor： BLEAK THOMAS M ,  PORTER JOE A

IPC: G01N27/28 ,  G01N27/48 ,  G01N27/49 ,  G01N27/54 ,  G01N27/46

CPC classification number: G01N27/404