Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

The High Pressure Gas Safety Institute of Japan

Agency of Industrial Science and Technology

Agency of Industrial Science and Technology Ministry of International

Mitsuo Namba

Mitsuo Yokohata

Kazuo Kubo

Shinichi Nakane

Tadanori Shirasawa

Hisashi Saito

Hirozumi Nakamura

Satoshi Takahashi

Yasukiyo Ueda

Takashi Uno

Hiroshi Horii

Kouichi Ueki

Kazutaka Asano

Kunio Kimata

Akira Matsuda

Shinzo Kato

Kouji Murase

Hisanori Yamashita

Shigetada Sazawa

Tsuneo Asayama

Reppei Uematsu

Fujio Hori

Kazutaka Hamada

Sadamu Kawashima

Tsuyoshi Honda

Isao Masuda

Kenji Yasuda

Hiroshi Takechi

Setting safety function, as appropriate, according to a user environment is enabled, thereby enhancing safety function. According to selection information from a safety function selection unit, a function setting unitsets arbitrary function among a plurality of functions as safety function pertaining to usage of a gas. When operating conditions for safety function are fulfilled, a monitoring unitdetects malfunction, which would arise during usage of a gas, and outputs a safety signal to a control unitin accordance with the set safety function. In accordance with a safety signal from the monitoring unit, the control unitcuts off a gas supply when an event fulfilling operating conditions for the set function has arisen. When an event fulfilling operating conditions for an unset function has arisen, a communication unitreports occurrence of malfunction pertaining to unset function to the monitoring center

Gas meter and gas safety system

The present invention is intended to make it possible to set security functions as necessary depending on usage environment, etc. and to improve the security functions; a function setting sectionsets security function information received from the outside via a communication line as security functions regarding the user of gas. According to the set security function, in the case that the operation conditions of the security function are satisfied, a monitoring sectiondetects a problem during the use of gas and outputs a security signal to a control section. Based on the security signal from the monitoring section, the control sectionshuts off the supply of gas in the case that a phenomenon satisfying an operation condition of the set function having been set has occurred.

Gas meter and gas security system

A use condition of gas equipment is monitored. An abnormality determination unitdetermines whether or not a use flow volume obtained by detecting a flow velocity obtained by measuring a signal transfer time in a medium using a flow velocity detection unitand converting the detected flow velocity into a flow volume using a flow volume calculation unit. When the shutoff unitshuts off a fluid pathwhen it is determined that there is abnormality, a return signal is output from a return unitto a shutoff unitin order to use the gas again by opening the fluid path. Simultaneously, when a return time-counting unitstarts the time-counting operation, and then, a predetermined time period has been elapsed, the flow volume calculation unitdetermines whether or not a predetermined flow volume of greater flows in order to identify whether or not all of the gas plugs of the gas equipment connected to the downstream of the gas shutoff apparatusare closed. The leakage determination unitdetermines that there is leakage when a predetermined flow volume or greater is detected, and a driving signal is output to the shutoff unitto close the fluid path

Gas block device and gas block method

Gas leakage detection system

Piping leakage detecting apparatus

A gas leak detection system comprises a flow sensor for detecting the amount of gas flowing through a gas flow passage, a flow signal generator for producing a flow signal representing the quantity of gas flow detected by the flow sensor, a pressure sensor installed in the gas flow passage at a point upstream of the flow sensor for detecting the gas pressure in the gas flow passage, a pressure signal generator for producing a pressure signal representing fluctuations in the pressure detected by the pressure sensor and a computing device electrically connected with the flow signal generator and the pressure signal generator. When it is found that no flow signal is being produced, the pressure fluctuation is compared with a prescribed pressure fluctuation range and a leak signal is produced when the pressure fluctuation value falls within the prescribed range.

Gas leak detection system

A gas flow rate is measured and therefrom 'consumption state' defined by combination of maximum flow rate, increase of total amount and a consumption time of the gas is detected, and then, the consumption state is compared with a 'reference consumption condition' representing a predetermined consumption state; and when the 'consumption state' exceeds the 'reference consumption condition', a gas control means interrupt supply of the gas; and thereafter, after restoration of the gas control means to gas supply state, the actual gas consumption state is measured for a predetermined time counted by timer when the gas flow rate exceeds a predetermined level.

Gas shutoff apparatus

Growing community of inventors

Machida, Japan

Mitsuo Namba