Title:
炎検知器
Document Type and Number:
Japanese Patent JP6755105
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To determine whether a housing window or a detection element is normal with a simple structure without receiving any restriction to meet the standard of a pressure-resistant explosion-proof structure.SOLUTION: An inspection light source 34 is installed in the inside of a housing window 40 and provided so that light is irradiated to an area of the housing window 40 corresponding to a flame detection object range . Infrared light incident from the outside by a first sensor 12, a second sensor 14, and a third sensor 16 and passing through the housing window 40 is detected and converted into an electrical signal. Whether the flame is detected or not is determined based on the detected electrical signal by a first calculation processing part 28 and a second calculation processing part 30. Further, the housing window 40, the first sensor 12, the second sensor 14 or the third sensor 16 are determined to be normal or not by the second calculation processing part 30 based on the electrical signal detected when the light is emitted from an inspection light source 34.SELECTED DRAWING: Figure 1
Inventors:
Takashima samurai
Iwamoto Dai
Ryo Ishikawa
Masanori Hirasawa
Iwamoto Dai
Ryo Ishikawa
Masanori Hirasawa
Application Number:
JP2016044786A
Publication Date:
September 16, 2020
Filing Date:
March 08, 2016
Export Citation:
Assignee:
Fukada Industry Co., Ltd.
International Classes:
G08B17/12; G01J1/02; G01J1/42; G08B17/00
Domestic Patent References:
| JP6325271A | ||||
| JP2000040189A | ||||
| JP2010073019A | ||||
| JP2004061482A | ||||
| JP2006139214A | ||||
| JP2013170822A | ||||
| JP2008298627A | ||||
| JP3150836U | ||||
| JP59015192U | ||||
| JP61051592U | ||||
| JP2005121490A |
Foreign References:
| WO2006125935A1 | ||||
| KR100920067B1 |
Other References:
赤外線3波長式炎検知器,日本,能美防災株式会社,2009年 2月,特にp.3 赤外線3波長式炎検知器仕様,URL,https://www.nohmi.co.jp/webcatalog/pdf/infrexeye.pdf
Attorney, Agent or Firm:
Patent Service Corporation Taiyo International Patent Office