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1. 发明授权

US4127887A Safety test circuit for combustion control apparatus 失效
标题翻译：燃烧控制装置的安全测试电路
公开(公告)号：US4127887A
公开(公告)日：1978-11-28
申请号：US825725
申请日：1977-08-18
申请人： Toshio Tanaka , Juichi Honda , Sadao Mimori , Kazutoshi Ikegami
发明人： Toshio Tanaka , Juichi Honda , Sadao Mimori , Kazutoshi Ikegami
IPC分类号： F23N5/20 , F23N5/24 , G01R31/00 , H02H3/26
CPC分类号： G01R31/006 , F23N5/242 , F23N2027/12 , F23N2027/16 , F23N2027/18 , F23N5/20
摘要： A safety test circuit for a combustion control apparatus. This safety test circuit is used to check the off-failure of a safety transistor actuating a safety relay which acts to stop the operation of controlled units in the event of mal-combustion or the like, and also to check the on-failure of a control transistor actuating a control relay which controls the controlled units. An operation instruction signal and the collector potential of the safety transistor are applied to a logic circuit including a flip-flop and logic gates so that the off-failure of the safety transistor can be driven to check, utilizing the electrical signal propagation delay time of the elements constituting the logic circuit, before the propagation delay time has elapsed. The logic circuit is also used for similarly checking the on-failure of the control transistor. A check signal may be additionally applied to the logic circuit so that these transistors can be tested during the continuous operation of the combustion control apparatus.
摘要翻译：一种用于燃烧控制装置的安全测试电路。该安全测试电路用于检查致动安全继电器的安全晶体管的失效，该安全继电器用于在发生不良燃烧等情况下停止受控单元的操作，并且还检查一个控制晶体管驱动控制受控单元的控制继电器。将操作指令信号和安全晶体管的集电极电位施加到包括触发器和逻辑门的逻辑电路，使得可以驱动安全晶体管的断开故障来检查，利用电信号传播延迟时间在传播延迟时间过去之前构成逻辑电路的元件。逻辑电路也用于类似地检查控制晶体管的导通故障。可以将校验信号额外地施加到逻辑电路，使得可以在燃烧控制装置的连续操作期间对这些晶体管进行测试。

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