CN2704839Y - Ultraviolet flame detectors - Google Patents
Ultraviolet flame detectors Download PDFInfo
- Publication number
- CN2704839Y CN2704839Y CN 200420033867 CN200420033867U CN2704839Y CN 2704839 Y CN2704839 Y CN 2704839Y CN 200420033867 CN200420033867 CN 200420033867 CN 200420033867 U CN200420033867 U CN 200420033867U CN 2704839 Y CN2704839 Y CN 2704839Y
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- output
- pulse
- decision circuitry
- circuit
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- Fire-Detection Mechanisms (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model discloses an ultraviolet flame detector, comprising an ultraviolet photosensitive sensors(2) in a detecting window (10) of an end cover (1) of the casing. The ultraviolet photosensitive sensors(2) is connected with a flame ultraviolet pulse receiving circuit (13) on a circuit board (9). The output of the flame ultraviolet pulse receiving circuit (13) is connected with a pulse shaping circuit (14). The output of the pulse shaping circuit (14) is connected with the input of the pulse frequency judging circuit (15). The output of the pulse frequency judging circuit (15) is connected with the input of a pulse width judging circuit (16). The output of the pulse width judging circuit (16) is connected with an alarm device.
Description
Technical field:
The utility model is relevant with the light sensation flame detector of monitoring environment flame.
Background technology:
Existing ultraviolet flame detector generally adopts the UV-radiation-sensitive components and parts of spectral range broad, it is to having response as nonflame light such as daylight, this detector might cause wrong report because of environmental impact, cause the action of interlock fire-protection equipment to cause bigger economic loss, because based on the place of flame sprouting, existing ultraviolet flame detector caused fire because of the fault of construction of self when ultraviolet flame detector was used for the fire generation more.
The utility model content:
The purpose of this utility model is to provide a kind of can effectively prevent wrong report artificial and that lamp causes, fast to the flame response time simultaneously, the ultraviolet flame detector that the warning reliability is high.
Another purpose of the present utility model provides a kind of ultraviolet flame detector that self has explosion prevention function.
The utility model is achieved in that
The utility model ultraviolet flame detector, UV photosensitive sensor 2 in the detection window 10 of the skull 1 of housing is connected with the flame ultraviolet pulse receiving circuit 13 on the circuit board 9, the output of flame ultraviolet pulse receiving circuit 13 connects pulse shaping circuit 14, the output of pulse shaping circuit 14 is connected with the input of pulsed frequency decision circuitry 15, the output of pulsed frequency decision circuitry 15 is connected with the input of pulse width decision circuitry 16, the output of pulse width decision circuitry 16 device taking alarm.
Said pulse receiving circuit 13 has stepup transformer N
1Input connect power supply, output meets bridge rectifier B
1Input, B
1Output meet UV photosensitive sensor N
21 end, N
2The voltage comparator N of 2 termination pulse shaping circuits 14
3Inverting input, N
3Output termination pulsed frequency decision circuitry 15, frequency decision circuitry 15 is by triode V
1Emitter and capacitor C
2An end and timer N
4Linking to each other constitutes, and pulse width decision circuitry 16 is by triode V
2Emitter and capacitor C
3An end and timer N
4Link to each other N
4Output device taking alarm.
UV photosensitive sensor N
2Be CD34 or R259, voltage comparator N
3Be integrated package 324, timer N
4Be integrated package 555 or 556.
The two ends of the guide 3 of housing 12 are threaded with skull 1 and tailstock 4 respectively, UV photosensitive sensor 2 is fixed on the circuit board 9, circuit board 9 by screw retention on the cable connection panel 17 of sleeve 3, terminal block 17 is fixed on the tailstock 4, bonnet 5 is connected with tailstock 4, and housing screw 7 is threaded with bonnet 5, the inner chamber 18 that screw 7, bonnet 5, tailstock 4 have cable to pass through, ball handle 11 upper ends are connected with tailstock 4, and the lower end bulb cooperates with base 8.
The utility model has used sensor novel and that special material is made, and the UV photosensitive sensor is an inflatable UV photosensitive device.This makes the utility model highly sensitive, the response time fast (for 0.5m handle standard candle the response time≤3S), UV photosensitive sensor N
2The spectral range of response is 0.185-0.260 μ m, and this spectral range just in time is that solar radiation is absorbed, so it is strong to have an antijamming capability, to advantages such as daylight and general lighting light are insensitive.The explosion separation structure design of the utility model uniqueness can be used for the dangerous place with a potential explosion and the open-air use of oil field, gas well.
Description of drawings:
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is for being structural drawing of the present utility model.
Fig. 3 is circuit theory diagrams of the present utility model.
Embodiment:
UV photosensitive sensor 2 is arranged in the utility model housing 12, the signal input circuit plate 9 of sensor 2, the output of circuit board 9 device taking alarm, sensor 2 convert the ultraviolet signal that detects to electric signal be input to that pulse shaping circuit 14 amplifies through flame ultraviolet pulse receiving circuit 13 and shaping after input pulse frequency decision circuitry 15, after the electric signal of input satisfies the condition of setting, pulse signal of output terminal output in pulsed frequency decision circuitry 15 arrives pulse width decision circuitry 16, after the electric signal of input satisfies the condition of setting, fire alarm of circuit 16 outputs is connected to alarm control unit.
Said UV photosensitive sensor 2 is N in the utility model pulse receiving circuit 13
2(GD34 or R259), stepup transformer N
1Through bridge rectifier B
1Rectification and capacitor C
1Meet N after the filtering
21 end, N
22 terminations go into pulse shaping circuit 14.
Pulse shaping circuit 14 is mainly by voltage comparator N
3(324) constitute N
33 pin and R
2, R
3Link to each other and to play signal and relatively act on N
31 end be that signal amplifies and shaping output, its access frequency decision circuitry 15.
Pulsed frequency decision circuitry 15 and pulse width decision circuitry 16 are by timer N
4(555,556) and triode constitute, N
31 pin output be a pulse electrical signal, electric signal is through triode V
1Base electrode input N
46 pin, by to C
2The time that discharges and recharges by N
4Judge whether pulsed frequency satisfies flame condition, if satisfy at N
45 pin obtain a pulse signal.Pulse signal is through triode V
2Base electrode input N
48 pin, by to C
3The time that discharges and recharges by N
4Judging whether pulse width satisfies condition, (its condition can be set t=0-10 second, t=1.1R7C according to service condition
3If) satisfy, at N
49 pin obtain a fire alarm.
Claims (4)
1, ultraviolet flame detector, it is characterized in that the UV photosensitive sensor (2) in the detection window (10) of skull (1) of housing is connected with flame ultraviolet pulse receiving circuit (13) on the circuit board (9), the output of flame ultraviolet pulse receiving circuit (13) connects pulse shaping circuit (14), the output of pulse shaping circuit (14) is connected with the input of pulsed frequency decision circuitry (15), the output of pulsed frequency decision circuitry (15) is connected with the input of pulse width decision circuitry (16), the output device taking alarm of pulse width decision circuitry (16).
2, detector according to claim 1 is characterized in that said pulse receiving circuit (13) has stepup transformer N
1Input connect power supply, output meets bridge rectifier B
1Input, B
1Output meet UV photosensitive sensor (N
2) 1 end, N
2The voltage comparator N of 2 termination pulse shaping circuits (14)
3Inverting input, N
3Output termination pulsed frequency decision circuitry (15) frequency decision circuitry (15) by triode V
1Emitter and capacitor C
2An end and timer N
4Linking to each other constitutes, and pulse width decision circuitry (16) is by triode V
2Emitter and capacitor C
3An end and timer N
4Link to each other N
4Output device taking alarm.
3, detector according to claim 2 is characterized in that UV photosensitive sensor (N
2) be CD34 or R259, voltage comparator N
3Be integrated package 324, timer N
4Be integrated package 555 or 556.
4, detector according to claim 1, the two ends that it is characterized in that the guide (3) of housing (12) are threaded with skull (1) and tailstock (4) respectively, UV photosensitive sensor (2) is fixed on the circuit board (9), circuit board (9) by screw retention on the cable connection panel (17) of sleeve (3), terminal block (17) is fixed on the tailstock (4), bonnet (5) is connected with tailstock (4), housing screw (7) is threaded with bonnet (5), screw (7), bonnet (5), the inner chamber (18) that tailstock (4) has cable to pass through, ball handle (11) upper end is connected with tailstock (4), and the lower end bulb cooperates with base (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420033867 CN2704839Y (en) | 2004-06-04 | 2004-06-04 | Ultraviolet flame detectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420033867 CN2704839Y (en) | 2004-06-04 | 2004-06-04 | Ultraviolet flame detectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2704839Y true CN2704839Y (en) | 2005-06-15 |
Family
ID=34772892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420033867 Expired - Fee Related CN2704839Y (en) | 2004-06-04 | 2004-06-04 | Ultraviolet flame detectors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2704839Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254399A (en) * | 2011-07-05 | 2011-11-23 | 吴江多艺纺织有限公司 | Fire alarm system for textile workshop |
| CN105911366A (en) * | 2016-06-12 | 2016-08-31 | 宝鸡通茂电子传感设备研发有限公司 | Flame detector |
-
2004
- 2004-06-04 CN CN 200420033867 patent/CN2704839Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254399A (en) * | 2011-07-05 | 2011-11-23 | 吴江多艺纺织有限公司 | Fire alarm system for textile workshop |
| CN105911366A (en) * | 2016-06-12 | 2016-08-31 | 宝鸡通茂电子传感设备研发有限公司 | Flame detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |