Kabushiki Kaisha Toshiba

Toshiba Plant Systems & Services Corporation

Yuma Eto

Yukio Okamoto

Masayuki Tobo

Yoshiyuki Nitta

Mamoru Fukui

Susumu Yoshizawa

Toshio Tagawa

Tomokazu Imahori

Noboru Morohoshi

Kazuo Ootani

Shigeru Yamaji

Kenichi Wakamatsu

A duplexed control system comprises: two control devices, whereof one is set to operate as a reserve system and the other is set to operate as a regular system; a tracking bus that connects the two control devices to enable these to exchange tracking signals; and a control transmission channel that transmits computational information of these two control devices; wherein: the control devices respectively have: an own-system state evaluation section that transmits the result of state evaluation of its own system as a tracking signal through the tracking bus to the other system; an other-system signal confirmation section that receives the tracking signal through the tracking bus from the control device of the other system and thus performs state confirmation; and a transmission channel changeover section that, if the tracking signal cannot be received through the tracking bus, effects transmission of the tracking signal to the other-system signal confirmation section of the other system, through the control transmission channel.

Duplexed control system and control method thereof

According to one embodiment, a thermocouple abnormality detection system including: a plurality of thermocouples each including a plurality of thermocouple wires housed in a sheath; a transmission signal conversion unit configured to convert a thermo-electromotive force generated by each of the plurality of the thermocouple wires to a transmission signal and to output the transmission signal; a transmission unit configured to transmit the transmission signal outputted from the transmission signal conversion unit; and an abnormality detection circuit configured to detect an abnormality of each of the plurality of the thermocouples by comparing, with each other, the transmission signals obtained from the plurality of thermocouple wires provided in each of the thermocouples.

Thermocouple abnormality detection system and detection method thereof

Growing community of inventors

Sagamihara, Japan

Yuma Eto