CN2403084Y - Ultraviolet flame detector - Google Patents
Ultraviolet flame detector Download PDFInfo
- Publication number
- CN2403084Y CN2403084Y CN 99254358 CN99254358U CN2403084Y CN 2403084 Y CN2403084 Y CN 2403084Y CN 99254358 CN99254358 CN 99254358 CN 99254358 U CN99254358 U CN 99254358U CN 2403084 Y CN2403084 Y CN 2403084Y
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- CN
- China
- Prior art keywords
- circuit
- pin
- resistance
- triode
- output
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- 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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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Abstract
The utility model discloses an ultraviolet flame detector. The utility model adopts an apolar conversion circuit, a voltage regulator circuit, a decoder, a code return pulse, a voltage multiplying rectifier, a pulse regeneration circuit and integration circuit. The utility model adopts an apolar double bus line system and a self recovery protective circuit, and avoids the trouble of changing a reversed power supply, damaged internal devices and components and short-circuited circuits; at the same time, an MC145027 decoder and an MC145026 encoder are adopted and matched to be used, the work of a controller in inspecting devices which need detecting is accomplished, address codes adopt the mode of five-bit ternary notation, and codes can be arranged in a range from 1 to 242.
Description
The utility model relates to a kind of fire detection equipment, is a kind of ultraviolet flame detector specifically.
Fire alarm system mainly is made up of alarm controller and fire detector, and that fire detector plays a part in total system is very important, and fire detector mainly is divided into several big classes such as smoke detector, heat detector and sensitive detector at present.The sensitization ray that produces when it can experience substance combustion as sensitive detector when the sensitization ray surpasses certain intensity, sends fire alarm signal.And the most sensitivity of existing sensitive detector is low, and power consumption is big, is subject to external environment influence, and adaptive faculty is poor, and cost is higher in addition, so use less.
The purpose of this utility model provides a kind of when the scene produces flame combustion, can in time, accurately send the ultraviolet flame detector of fire alarm signal.
For achieving the above object, technical solution of the present utility model is achieved like this: by the double bus of alarm controller output by P
1Input is through inserting D from recovering insurance FUSE
1-D
4The bridge rectifier circuit of forming carries out nonpolarity conversion, D
1, D
2The negative electrode positive output end is through diode D
5Insert electrochemical capacitor C
1Positive pole, be connected to resistance R by negative pole
17, triode T
4, voltage stabilizing diode DW and capacitor C
2The serial regulating circuit of forming, the one road inserts U
216 pin feeder ears of integrated circuit, integrated stable voltage circuit U is inserted on another road
11 pin; By D
1, D
2The cathode end contact passes through resistance R
19, R
20Be connected to triode T
3Base stage, collector connecting resistance R
8, R
9Insert U after the dividing potential drop
29 pin, by U
2The 1-5 pin connect the coded address and circuit be set, U
2The external resistance-capacitance circuit of 6,7,10 pin, 13 pin are exported through resistance R
12Insert triode T
6Base stage, collector connects the LED luminotron; By U
12 pin pass through resistance R
23Meet triode T
7Emitter, collector is connected to transformer B and forms transformer single tube oscillation step-up circuit, output AC voltage is through C
14, D
9, D
10Voltage doubling rectifing circuit is passed through resistance R again
29, C
13The integrating circuit of forming is connected to the anode of ultraviolet light sensing tube GD, and the negative electrode of GD is through resistance R
31, R
26, C
11Be connected to 8,9 pin of shaping circuit U3C, by the output of 10 pin, through resistance R
30Capacitor C
9Insert the monostable circuit that U3B, U3C form respectively, and export through diode D by 4 pin of U3B
8, resistance R
21Be connected to 12,13 pin of U3D, 11 pin of output terminal pass through resistance R
27Insert triode T
5Base stage, collector passes through resistance R
7, capacitor C
4Be connected to U
211 pin of output terminal are by resistance R
7, capacitor C
4Contact on connect resistance R
6Be connected to triode T
2Base stage, collector is through resistance R
4Be connected to triode T
1Base stage, through T
2, T
1The two poles of the earth triode sends it back a yard pulse after amplifying.
The utility model compared with prior art has following characteristics:
1, nonpolarity double bus system
The double bus system of employing is convenient to on-the-spot installation wiring, and every detector has a fixing coded address, can form warning system by many detectors.Input end is connected into bridge rectifier circuit, avoids power supply to connect instead, damages internal components.Detector was non-coding circuit in the past, formed warning system and need adopt multi-thread linking to each other, and wiring is complicated.
2, adopt the self-recovery protection circuit
Holding circuit in the past adopts protective tube mostly, need in time change after the damage, and the insurance of recovery type certainly can recover after short circuit is removed automatically, the trouble of not only having protected circuit but also avoided replacing to be brought.
3, low-power consumption mu balanced circuit
Adopt low-power consumption integrated regulator HT1050, output current 50MA, standby current are less than 10HA, and output voltage is 5V.
4, adopt the special-purpose decoding chip of MOTOROLA company
The patrol and examine work of controller to detector is finished in MC145027 demoder and the supporting use of MC145026 scrambler, and geocoding adopts five three-shift modes, and coding can be set between 1-242.
5, adopt the cmos digital integrated circuit
CD4011 includes four inputs, two Sheffer stroke gates, is used for shaping pulse with one of them door, and two are used to form monostable circuit, and another is used for the output buffering.
Embodiment is to the concrete description of this novel do in conjunction with the accompanying drawings.
Fig. 1 is the ultraviolet flame detector circuit theory diagrams.
By shown in Figure 1, ultraviolet flame detector by the double bus of controlling alarm output by P
1Input is through entering D after recovering to insure FUSE
1-D
4The bridge rectifier circuit of forming, the pulse signal of bridge rectifier circuit input carries out nonpolarity conversion, D
1, D
2Negative electrode just is output as, D
3, D
4Anode is output as negative, D
1, D
2Negative electrode output is through diode D
5Insert electrochemical capacitor C
1Positive pole is through C
1Add negative pole after the filtering by R
17, T
4, DW, C
2The serial regulating circuit of forming, about 9V voltage one tunnel and U after the voltage stabilizing
2(MC145027) 16 pin feeder ears of integrated circuit, another road adds integrated stable voltage circuit U
11 pin, also provide power supply simultaneously for alarm lamp.Decoding scheme U
2External address setting circuit, circuit is accepted in data pulse, returns decoding circuit, time constant circuit and alarm set point circuit for lamp.By D
1, D
2The signal of negative electrode output is through R
19, R
20, T
3After the base stage input, by collector output, by R
8, R
9Insert U after the dividing potential drop
29 pin.U
2The 1-5 pin connect the coded address circuit be set, geocoding adopts five three-shift coded systems, promptly every bit address has three kinds of states, connect high level, unsettled, connect low level.U
2The external resistance-capacitance circuit of 6,7,10 pin, time constant and controller are sent out frequency friendly and are complementary.U
213 pin output through resistance R
12Insert triode T
6Base stage, through triode T
6After the amplification, it is luminous to promote LED by collector.By U
1The 5V voltage of 2 pin output is through resistance R
23Add triode T
7Collector, triode T
7And transformer B composition transformer single tube oscillation step-up circuit, the alternating voltage of transformer output is through C
14, D
9, D
10Voltage doubling rectifing circuit becomes the direct current about about 300V, again through resistance R
29, C
13The integrating circuit of forming joins the anode of ultraviolet light sensing tube GD, and the negative electrode of GD is through resistance R
31, R
26, C
11After adding 8,9 pin of shaping circuit U3C, by the output of 10 pin, U3B, U3C, R
30, C
9Form monostable circuit, monostable circuit is by the 4 pin output of U3B, through diode D
8, resistance R
21After, 12,13 pin of access U3D, 12,13 pin are external by C
8, RW, R
28The integrating circuit of forming.The 11 pin output of U3D is through resistance R
27Insert triode T
5Base stage, the output of U3D control T
5Conducting and end.U
211 pin output through resistance R
6, capacitor C
4Access T
2Base stage, through T
2, T
1The two poles of the earth triode sends it back a yard pulse after amplifying.
Controller adopts five three-shift coded systems, and amplitude is 24V, wherein represents that with two pulses a three-shift encodes, and two continuous high level represent that 2, one high level and low level represent that 1, two low level represents 0.Wherein the width of broad pulse is about 200US, and the width of burst pulse is 30US.FUSE is from recovering insurance.D
1-D
4Form bridge rectifier circuit, it is nonpolarity that input signal is converted to.When input polarity is P
12 pin when being anode, diode D
1, D
4Conducting D
1, D
2Negative electrode just is output as, D
3, D
4Anode be output as negative.When input polarity is P
11 pin when being anode, diode D
2, D
3Conducting D
1, D
2Negative electrode just is output as, D
3, D
4Anode be output as negative.Like this no matter input signal polarity how, D
1, D
2Negative electrode just all be output as, can prevent that stop polarity connects to damage internal circuit on the contrary.Input signal through polarity transformation circuits after D
5, R
19, R
20, T
3, R
8, R
9Form pulse shaping circuit, deliver to 9 pin of decoding circuit MC145027.R
17, T
4, DW
1Form serial regulating circuit, for MC145027 and warning alarm lamp provide power supply.HT1050 is the low-power consumption mu balanced circuit, for oscillation step-up circuit provides power supply.LED confirms pilot lamp for reporting to the police, and sends the order of lighting a lamp by controller behind detector alarm, through R
12, R
13, T
6The driven for emitting lights pipe is luminous.
Input end should add the DC voltage of 325 ± 25V during working sensor, when the ultraviolet ray in wavelength is the 180-260NM scope is shone, sensor will produce electric discharge phenomena, and discharge will make input voltage reduce, when being lower than ending discharge voltage 185V, to stop discharge, input voltage raises, and when raising greater than firing potential 280V, will produce discharge once more, move in circles like this, output terminal will have pulse signal output.
Because of working sensor needs 325 ± 25V DC voltage, and be input as 24V, therefore need to adopt booster circuit,, therefore adopt the single tube transformer to boost because of output current is very little.The supply voltage of sensor is very big to the sensitivity influence, and oscillatory circuit is powered with the 5V mu balanced circuit.For reducing volume of transformer, adopt voltage doubling rectifing circuit.
The principle of work of MC145027 is as follows: wherein the 1-5 pin is that geocoding is provided with end, adopts the three-shift mode.Connect low level and represent 0, unsettled representative 1 connects high level and represents 2.The calculation of coding method is:
Code clerk=A
1* 3
0+ A
2* 3
1+ A
3* 3
2+ A
4* 3
3+ A
5* 3
4
9 pin are the serial signal input end.6,7,10 external time constants and signaling frequency are complementary.12-15 is a data output end, and 16 pin are power supply, and 8 pin are ground.
The serial code of 9 pin input is through MC145027 inner decoding circuit, and when the input coding address is identical with this detection address, will there be corresponding signal output the corresponding data position, and 11 pin are exported the pulse signal about a 3MS simultaneously, and this signal is through C
4, R
7The differentiating circuit of forming is again through T
2, T
1Two-stage is modulated on the bus after amplifying.The differentiating circuit time constant is by triode T
5Control.Work as T
5R during conducting
7Ground connection, time constant diminishes, and modulating pulse is a burst pulse; Work as T
5R when ending
7Open circuit, time constant become big, and modulating pulse is a broad pulse.T during normal condition
5Conducting ends during warning.D
6Be discharge circuit, make C
4Electric capacity in time bleeds off.
The pulse signal of sensor output inserts U
38,9 pin.U
3Be 4/2 input nand gate circuit, adopt CMOS technology, have characteristics such as low in energy consumption, stable performance.U
3C is the pulse shaping circuit, and input pulse is converted to the CMOS level, sends into by U then
3A, U
3The monostable circuit that B forms.U under normal condition
38,9 pin of C are input as low level, and 10 pin are output as high level, U
31,2 pin of A are low level, and 3 pin are high level, U
3The 4 pin output low levels of B, U
3The 11 pin output high level of D, T
5Conducting.Work as U
3When 8,9 pin of C have the pulse input, U
3The 10 pin output high level of C will make U
34 pin of B are output as high level, pass through R simultaneously
30To C
9Charging, U
3The 3 pin output low levels of A are worked as U
3When 8, the 9 pin pulses of C disappear, U
3The 4 pin letter of B keeps high level.Along with U
3The voltage of 1,2 pin of A constantly descends, when being lower than the CMOS thresholding, and U
3The 3 pin output high level of A will make U
3The B output low level, pulse of the every output of sensor like this is at U
34 pin of B will be exported the pulse of a fixed width.Pulse width is by C
9And R
30Decision.By R
21And C
8Form integrating circuit, R
28With RW be discharge circuit, work as C
8When voltage is higher than thresholding, U
3The D output low level is sent alerting signal.Regulate RW and can change alarming threshold value.
Claims (1)
1, ultraviolet flame detector is characterized in that, by the double bus of alarm controller output by P
1Input is through inserting D from recovering insurance FUSE
1-D
4The bridge rectifier circuit of forming carries out nonpolarity conversion, D
1, D
4The negative electrode positive output end is through diode D
5Insert electrochemical capacitor C
1Positive pole, be connected to resistance R by negative pole
17, triode T
4, voltage stabilizing diode DW and capacitor C
2The serial regulating circuit of forming, the one road inserts U
216 pin feeder ears of integrated circuit, integrated stable voltage circuit V is inserted on another road
11 pin; By D
1, D
2The cathode end contact passes through resistance R
19, R
20Be connected to triode T
3Base stage, collector connecting resistance R
8, R
9Insert U after the dividing potential drop
29 pin, by U
2The 1-5 pin connect the coded address and circuit be set, U
2The external resistance-capacitance circuit of 6,7,10 pin, 13 pin are exported through resistance R
12Insert triode T
6Base stage, collector connects the LED luminotron; By U
12 pin pass through resistance R
23Meet triode T
7Emitter, collector is connected to transformer B and forms transformer single tube oscillation step-up circuit, output AC voltage is through C
12, D
9, D
10Voltage doubling rectifing circuit is passed through resistance R again
29, C
13The integrating circuit of forming is connected to the anode of ultraviolet light sensing tube GD, and the negative electrode of GD is through resistance R
31, R
26, C
11Be connected to 8,9 pin of shaping circuit U3C, by the output of 10 pin, through resistance R
30Capacitor C
9Insert the monostable circuit that U3B, U3C form respectively, and export through diode D by 4 pin of U3B
8, resistance R
21Be connected to 12,13 pin of U3D, 11 pin of output terminal pass through resistance R
27Insert triode T
5Base stage, collector passes through resistance R
7, capacitor C
4Be connected to U
211 pin of output terminal are by resistance R
7, capacitor C
4Contact on connect resistance R
6Be connected to triode T
2Base stage, collector is through resistance R
4Be connected to triode T
1Base stage, through T
2, T
1The two poles of the earth triode sends it back a yard pulse after amplifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254358 CN2403084Y (en) | 1999-11-22 | 1999-11-22 | Ultraviolet flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254358 CN2403084Y (en) | 1999-11-22 | 1999-11-22 | Ultraviolet flame detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2403084Y true CN2403084Y (en) | 2000-10-25 |
Family
ID=34038012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99254358 Expired - Lifetime CN2403084Y (en) | 1999-11-22 | 1999-11-22 | Ultraviolet flame detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2403084Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103530969A (en) * | 2013-11-01 | 2014-01-22 | 浙江爱德电子有限公司 | Fire alarm controller loop unit and control method thereof |
| CN105092953A (en) * | 2015-09-17 | 2015-11-25 | 无锡蓝天电子有限公司 | Residual current detector and fire alarm system |
-
1999
- 1999-11-22 CN CN 99254358 patent/CN2403084Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103530969A (en) * | 2013-11-01 | 2014-01-22 | 浙江爱德电子有限公司 | Fire alarm controller loop unit and control method thereof |
| CN103530969B (en) * | 2013-11-01 | 2015-12-02 | 浙江爱德电子有限公司 | fire alarm controller loop unit and control method thereof |
| CN105092953A (en) * | 2015-09-17 | 2015-11-25 | 无锡蓝天电子有限公司 | Residual current detector and fire alarm system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: GST LIMITED TO: GST HOLDINGS LIMITED |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Haiwan Safety Technology Co., Ltd Patentee before: Gulf Security Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: GST LIMITED Free format text: FORMER NAME OR ADDRESS: GST HOLDINGS LIMITED |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Gulf Security Technology Co., Ltd. Patentee before: Haiwan Safety Technology Co., Ltd |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |