Title:
GUARDING TERMINAL EQUIPMENT
Document Type and Number:
Japanese Patent JP2978756
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To attain sure maintenance of sensors and to improve the reliability of guard.
SOLUTION: A sensor managing part 2 monitors outputs from respective sensors 11 to 1n and outputs the information S1 of a sensor detecting a fire, an entering/leaving person or the like. A non-operation time measuring part 4 receives the output of a timer 3 and the sensor information S1 and measure the non-operation time of each sensor. A non-operation time data storing part 5 stores non-operation time data to be previously set fault judging references in accordance with the sorts of sensors and their set positions. A fault judging part 6 periodically compares the non-operation time of each sensor with the non-operation time data stored in the storing part 5, and if there is a sensor exceeding the value of the non-operation time data, the sensor is judged as a defective sensor and fault information S2 is outputted. Simultaneously, the counting part 4 is controlled so as to clear the non-operation time of the sensor and restart the measuring of non-operation time.
Inventors:
OOMORI TOSHIHIRO
Application Number:
JP3818396A
Publication Date:
November 15, 1999
Filing Date:
February 26, 1996
Export Citation:
Assignee:
NIPPON DENKI TEREKOMU SHISUTEMU KK
International Classes:
G08B13/00; G08B17/00; G08B29/04; (IPC1-7): G08B29/04
Domestic Patent References:
| JP58204376A | ||||
| JP3229398A | ||||
| JP6243371A | ||||
| JP371298A |
Attorney, Agent or Firm:
Naoki Kyomoto