EP0130307B1 - Fire detector equipped with sensor - Google Patents
Fire detector equipped with sensor Download PDFInfo
- Publication number
- EP0130307B1 EP0130307B1 EP84104862A EP84104862A EP0130307B1 EP 0130307 B1 EP0130307 B1 EP 0130307B1 EP 84104862 A EP84104862 A EP 84104862A EP 84104862 A EP84104862 A EP 84104862A EP 0130307 B1 EP0130307 B1 EP 0130307B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- time
- sensor
- output level
- fire detector
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
Definitions
- This invention relates to a fire detector equipped with a sensor according to the introductory part of the claim 1.
- Such fire detectors are used in automatic alarm systems for detecting fire at an early stage, in order to be able to initiate appropriate defense measures. They comprise usually sensor means for detecting a quantity of heat, light or smoke and producing an electrical signal having a characteristic indicative of a monitored condition, threshold detection means for comparing said electrical signal with a predetermined level and generating an alarm when a predetermined basic value is exceeded, and converter means for transmitting the alarm signal to an external signal center.
- the conventional fire detectors of this kind continuously supervise changes in the output levels of the sensor means and operate when a predetermined basic level is exceeded. Therefore, even though one can know by operation of the fire detector that the output level has exceeded the basic level it is not possible to know later the actual output level at that time or the operating time of the detector. Therefore, it has been impossible to clear up the cause of the false alarm if produced by the fire detector.
- a primary object of the invention to provide a new and improved construction of a fire detector equipped with a sensor means which detects a quantity of heat, light or smoke and with means to store the time and output level of the sensor when the fire detector operated and to indicate the stored time and output level at any time.
- a further significant object of the invention is to provide a new and improved construction of a fire detector which comprises means to indicate a present time or a present output level of the sensor means.
- the fire detector of the present invention is characterized by means to store the time when the fire detector has operated and the output level of the sensor at that time and means to indicate the stored time and the output level at any time.
- a sensor 1 which detects a quantity of heat, light or smoke.
- an amplifier 2 which amplifies output of the sensor 1.
- an A - D converter 3 which converts an analogue signal showing an output level of the sensor 1 to a digital signal.
- a clock part 4. a first indicating part 5 which indicates a present time or a present output level of the sensor 1 whenever necessary.
- a second indicating part 6 which indicates the time when the fire detector operated and an output level of the sensor 1 at that time.
- a memory 7 hereafter referred to as ROM) which stores a predetermined basic level as a basis to determine whether the output level of the sensor 1 should be taken as fire.
- a memory 8 (hereafter referred to as RAM) which stores the time when the fire detector operated and an output level of the sensor 1 at that time.
- RAM random access memory
- CPU central processing unit 9
- an operating means comprising a power supply E, switches SW1 ⁇ SW4 and resistors R1 ⁇ R4, input terminals IN1 ⁇ IN4 to which external apparatus corresponding to the individual switches SW1 ⁇ SW4 are connected, and output terminals OUT1 ⁇ OUT4 to which external apparatus corresponding to the indicating parts 5 and 6 are connected.
- the switch SW1, resistor R1 and input terminal IN1 are provided to clear the RAM8 by operation of the switch or external apparatus.
- the switch SW2, resistor R2 and input terminal IN2, the switch SW3, resistor R3 and input terminal IN3, and the switch SW4, resistor R4 and input terminal IN4 are provided to switch the indication of the first indicating part 5 from the time to the output level of the sensor 1 by operation of the respective switch or external apparatus, and to cause the second indicating part 6 to indicate the time when the fire detector operated and the output level of the sensor 1 at that time.
- the output terminals OUT1 ⁇ OUT4 are used for transmitting the time and output level signal to the external apparatus corresponding to the first indicating part 5 and second indicating part 6.
- the output of the sensor 1 is always amplified by the amplifier 2, and the analogue signal indicating the output level is converted to a digital signal by the A - D converter 3, which is then sent to the CPU9.
- the ROM7 stores the basic level for comparison with the output level of the sensor 1. As the CPU9 starts operating (step 1), the RAM8 in which past data have been stored is cleared (step 3) if the switch SW1 for clearing the RAM8 is set in the ON position (step 2).
- step 2 In case the switch SW1 is set in the OFF position (step 2), it is judged that there is no need of clearing the RAM8, and with the signals from the clock part 4 and A - D converter 3 the present time and output level of the sensor 1 are read in (steps 4 and 5) respectively. Then, a discrimination is made as to whether the switch SW2 used for indicating the output level of the sensor 1 on the first indicating part 5 is set in the ON position (step 6). Nevertheless, since the switch SW2 is normally set in the OFF position, the first indicating part 5 indicates the present time (step 7). And the output level of the sensor 1 which has been read in at the above step 5 is compared with the basic level stored in the ROM7 (step 9).
- a discrimination is made as to whether the second indicating part 6 is giving the past indication (indication given at the time of the previous operation) (step 10). If yes, the second indicating part 6 is cleared (step 11). In both cases a discrimination is made as to whether the switches SW3 and SW4 which cause the second indicating part 6 to indicate the operating time and the output level of the sensor 1 at that time are set in the ON position (step 12). Nevertheless, as the switches SW3 and SW4 are normally set in the OFF position, the operation goes back to the above step 2 and repeatedly follows the above steps.
- step 9 if the output level exceeds the basic level (step 9), the fire detector produces a fire alarm (step 13), which is transmitted to a control panel which is not shown in the figure. And the time and the output level of the sensor 1 at this time is written in and stored in the RAM8 (step 14), and the operations after the step 2 are repeated.
- step 6 By switching on the switch SW2 for output level indication (step 6) it is possible to cause the first indicating part 5 to indicate the present output in place of the indicated time (step 8) so that changes in output level of the sensor 1 may be checked whenever necessary.
- the switches SW3 and SW4 should be set in the ON position (step 12). Then, the operating time stored in the RAM8 is read out (step 15) and indicated on the second indicating part 6 (step 16). Furthermore the output level of the sensor 1 at the above operating time is read out (step 17) and indicated on the second indicating part 6 together with the above operating time (step 18).
- the above has described the operating procedure by means of the switches SW1 ⁇ SW4. It is also possible to remotely cause the above operation to be performed by operating external apparatus which constitute operating means and are connected to the input terminals IN1 ⁇ IN4. Furthermore it is possible to connect external apparatus which constitute indicating means to the output terminals OUT1 ⁇ OUT4 so that the above mentioned various indications may be given on these indicating means together with or in place of the indications given by the first and second indication means.
- the first indicating part 5 is so devised that time alone is indicated at all times and the output level can be indicated whenever necessary by operation of the switch SW2, other indicating methods may also be adopted, e.g. simultaneous indication of both time and the output level, a choise of which should be made properly.
- the fire detector according to this invention is equipped with a sensor which detects a quantity of heat, light or smoke, and means to store the time and output level of the sensor when the fire detector operated and to indicate the stored time and output level at any time. Therefore it is possible to confirm the time when the fire detector operated and the above mentioned physical quantity at that time whenever necessity arises later. This feature is particularly advantageous in case the fire detector falsely operated, and makes possible to clear up the cause. As described above, this invention offers a fire detector having such advantages that have never been realized in the conventional detectors.
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
- Developing Agents For Electrophotography (AREA)
- Paper (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84104862T ATE76211T1 (de) | 1983-06-03 | 1984-04-30 | Mit abtastelement ausgestatteter branddetektor. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58098058A JPS59223896A (ja) | 1983-06-03 | 1983-06-03 | センサを備えた火災感知器 |
JP98058/83 | 1983-06-03 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0130307A2 EP0130307A2 (en) | 1985-01-09 |
EP0130307A3 EP0130307A3 (en) | 1987-07-29 |
EP0130307B1 true EP0130307B1 (en) | 1992-05-13 |
Family
ID=14209704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84104862A Expired - Lifetime EP0130307B1 (en) | 1983-06-03 | 1984-04-30 | Fire detector equipped with sensor |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0130307B1 (ja) |
JP (1) | JPS59223896A (ja) |
AT (1) | ATE76211T1 (ja) |
DE (1) | DE3485713D1 (ja) |
DK (1) | DK166109C (ja) |
ES (1) | ES8504398A1 (ja) |
FI (1) | FI842160A (ja) |
NO (1) | NO842183L (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6473494A (en) * | 1987-09-16 | 1989-03-17 | Nittan Co Ltd | Fire alarm system |
CA2014654A1 (en) * | 1989-05-08 | 1990-11-08 | Danny G. Snider | Portable radiometric data acquisition system |
GB9106969D0 (en) * | 1991-04-03 | 1991-05-22 | Virtual Logic Ltd | Elapsed event display |
FR2700848B1 (fr) * | 1993-01-22 | 1995-06-02 | Vaillant | Dispositif de réglage, notamment un potentiomètre avec un dispositif de signalisation affichant toute variation de la valeur de réglage. |
AT398847B (de) * | 1993-01-22 | 1995-02-27 | Vaillant Gmbh | Stelleinrichtung |
JP3487776B2 (ja) * | 1998-11-30 | 2004-01-19 | ホーチキ株式会社 | 火災感知設備における感知情報表示システム |
GB2348531A (en) * | 1999-02-17 | 2000-10-04 | Bambour Olubukola Omoyiola | Forest fire detector unit |
US9373235B2 (en) * | 2013-04-17 | 2016-06-21 | Honeywell International Inc. | System and method for storing and monitoring events at security devices |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3623087A (en) * | 1968-11-21 | 1971-11-23 | Mosler Safe Co | Alarm monitoring system |
US3665399A (en) * | 1969-09-24 | 1972-05-23 | Worthington Corp | Monitoring and display system for multi-stage compressor |
JPS5476832A (en) * | 1977-11-28 | 1979-06-19 | Fujimoto Seiyaku Kk | Composition for hard capsule of niphedipine having good effluent ratio |
JPS55166794A (en) * | 1979-06-13 | 1980-12-26 | Toshiba Electric Equip | Fire sensor |
JPS6024996B2 (ja) * | 1980-09-30 | 1985-06-15 | ホーチキ株式会社 | 火災検出装置 |
-
1983
- 1983-06-03 JP JP58098058A patent/JPS59223896A/ja active Pending
-
1984
- 1984-04-30 EP EP84104862A patent/EP0130307B1/en not_active Expired - Lifetime
- 1984-04-30 DE DE8484104862T patent/DE3485713D1/de not_active Expired - Fee Related
- 1984-04-30 AT AT84104862T patent/ATE76211T1/de not_active IP Right Cessation
- 1984-05-30 NO NO842183A patent/NO842183L/no unknown
- 1984-05-30 FI FI842160A patent/FI842160A/fi not_active Application Discontinuation
- 1984-06-01 ES ES533356A patent/ES8504398A1/es not_active Expired
- 1984-06-01 DK DK274284A patent/DK166109C/da not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0130307A3 (en) | 1987-07-29 |
DK166109B (da) | 1993-03-08 |
ES533356A0 (es) | 1985-04-01 |
EP0130307A2 (en) | 1985-01-09 |
DK274284A (da) | 1984-12-04 |
DK166109C (da) | 1993-07-19 |
FI842160A0 (fi) | 1984-05-30 |
ATE76211T1 (de) | 1992-05-15 |
JPS59223896A (ja) | 1984-12-15 |
DE3485713D1 (de) | 1992-06-17 |
NO842183L (no) | 1984-12-04 |
FI842160A (fi) | 1984-12-04 |
ES8504398A1 (es) | 1985-04-01 |
DK274284D0 (da) | 1984-06-01 |
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