CN202748907U - Single ultraviolet flame detector - Google Patents
Single ultraviolet flame detector Download PDFInfo
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- CN202748907U CN202748907U CN2012204268646U CN201220426864U CN202748907U CN 202748907 U CN202748907 U CN 202748907U CN 2012204268646 U CN2012204268646 U CN 2012204268646U CN 201220426864 U CN201220426864 U CN 201220426864U CN 202748907 U CN202748907 U CN 202748907U
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Abstract
The utility model discloses a single ultraviolet flame detector comprising: an industrial grade one-chip microcomputer, a high-voltage pulse circuit, an ultraviolet sensor photomultiplier, an ultraviolet signal sampling module, a pulse shaping circuit, an electric current loop circuit, and an alarm relay output circuit; the industrial grade one-chip microcomputer triggers the ultraviolet sensor photomultiplier through the high-voltage pulse circuit, and ultraviolet signals in the flame is sampled; the ultraviolet sensor photomultiplier transmits the sampled ultraviolet signals to the ultraviolet signal sampling module, and the ultraviolet signal sampling module transmits the obtained sampling signals to the industrial grade one-chip microcomputer through the pulse shaping circuit; and the industrial grade one-chip microcomputer transmits information to the electric current loop circuit and the alarm relay output circuit according to the sampling signals. The single ultraviolet flame detector has wide application scope and accurate alarm signals.
Description
Technical field
The utility model relates to a kind of warning device, refers to especially a kind of single ultraviolet flame detector of surveying flame medium ultraviolet signal.
Background technology
Conventional infrared flame detector can not be surveyed non-carbonaceous material burned flame.Its use principle is to survey the infrared light that the carbon dioxide that discharges in the flame combustion process ejects, judge the generation of fire with this, that is to say that infrared flame detector can only survey the combustion flame of carbonaceous material, and can not survey the burning of non-carbonaceous materials such as hydrogen, phosphorus, lithium metal.Therefore can not in time send alerting signal to the fire of this class material initiation, for society has brought great potential safety hazard.
Summary of the invention
It is a kind of applied widely that the utility model provides, and alerting signal is single ultraviolet flame detector accurately.
The technical solution of the utility model is achieved in that single ultraviolet flame detector, comprising: technical grade single-chip microcomputer, high-voltage pulse circuit, Ultraviolet sensor photomultiplier, UV signal sampling module, pulse shaping circuit and current loop circuit and alarm relay output circuit;
Wherein said technical grade single-chip microcomputer is by the UV signal in the high-voltage pulse circuit triggering Ultraviolet sensor photomultiplier collection flame;
The Ultraviolet sensor photomultiplier transfers to the UV signal sampling module with the UV signal that gathers, and the UV signal sampling module transfers to the technical grade single-chip microcomputer with the sampled signal of obtaining through pulse shaping circuit again;
The technical grade single-chip microcomputer will be according to sampled signal with communication to current loop circuit and alarm relay output circuit.
High-voltage pulse circuit comprises pulse producer, pulse converter and high-voltage inverter, its successively signal connection.
Pulse shaping circuit comprises pulse shaper and pulse converter, its successively signal connection.
The alarm relay output circuit is provided with two-way.
Also be provided with switch power module.
Current loop circuit is the output of 4～20mA electric current loop interface.
The utility model utilizes these UV signal to judge the generation of fire by surveying the ultraviolet signal that radiates in the flame combustion process, therefore can effectively detect the generation of general fire; And use highly sensitive vacuum photomultiplier as the sensor of flame detecting, highly sensitive, fast response time can be applied to such as military project, the special occasions such as inflammable and explosive.Therefore applied widely, alerting signal is accurate.
Description of drawings
Fig. 1 is electronic circuit block diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of the utility model technical grade single-chip microcomputer;
Fig. 3 is the circuit theory diagrams of the utility model high-voltage pulse circuit and UV signal sampling module;
Fig. 4 is the circuit theory diagrams of the utility model pulse shaping circuit;
Fig. 5 is the circuit theory diagrams of the utility model alarm relay output circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is specifically described:
Extremely shown in Figure 5 such as Fig. 1, a kind of single ultraviolet flame detector comprises: technical grade single-chip microcomputer 1, high-voltage pulse circuit, Ultraviolet sensor photomultiplier 5, UV signal sampling module 8, pulse shaping circuit and current loop circuit 9 and alarm relay output circuit 10; Wherein said technical grade single-chip microcomputer 1 triggers the UV signal that Ultraviolet sensor photomultiplier 5 gathers in the flame by high-voltage pulse circuit; Wherein, Ultraviolet sensor photomultiplier 5 is a sensor, and its principle of work is, in the situation that the high-voltage pulse input is arranged, detect UV signal, the output stage of sensor will be exported ultraviolet pulse, in the situation of UV signal useless, this sensor is can output pulse signal.Use highly sensitive vacuum photomultiplier as the sensor of flame detecting, highly sensitive, fast response time can be applied to such as military project, the special occasions such as inflammable and explosive; The characteristics of vacuum photomultiplier are to use the high-voltage pulse power supply, and the level pulse height reaches 350V, and when detecting a small amount of UV signal, high voltage pulse punctures internal electrode and discharges the output electric pulse signal.Ultraviolet sensor photomultiplier 5 transfers to UV signal sampling module 8 with the UV signal that gathers, and UV signal sampling module 8 transfers to technical grade single-chip microcomputer 1 with the sampled signal of obtaining through pulse shaping circuit again; Because general collection sampled signal is that the ultraviolet pulse deration of signal only has about 10uS, and not correct square-wave pulse signal, technical grade single-chip microcomputer 1 can't correctly receive these signals, just can transfer to 1 reception of technical grade single-chip microcomputer so must carry out shaping through pulse shaping circuit.
Technical grade single-chip microcomputer 1 will be according to sampled signal with communication to current loop circuit 9 and alarm relay output circuit 10.Preferably, current loop circuit 9 adopts the output of 4～20mA electric current loop interface.Adopt voltage---the sample electric pressure converter of 12 bit resolutions of the principle of electric current, digital/analog converter, guarantee the precision of output current, that voltage---electric current device uses is the XTR111 of TI company technical grade.And the contact current of the relay that alarm relay output circuit 10 adopts reaches 3A/250Vac, therefore is applicable to most occasion.Conventional infrared flame detector then there is no 4～20mA electric current loop warning output, so is provided with the output of 4～20mA electric current loop signal in the utility model, just can conveniently be connected in the industrial secondary instrument and use.Preferably, high-voltage pulse circuit comprises pulse producer 2, pulse converter 3 and high-voltage inverter 4, its successively signal connection.Pulse producer 2, input pulse are edge triggered signal, and the dutycycle of input pulse signal is not required, and therefore can reduce the dutycycle precision of input signal, and output signal are the signal of 50% dutycycle.Pulse switching circuit is 10uS because high-voltage inverter circuit needs the width of positive pulse, and using this circuit can utilize dutycycle is that 50% positive pulse converts the needed positive pulse width of inverter to.High-voltage pulse inverter, input supply voltage are 5Vdc, by pulse control and voltage transitions, can the output amplitude height be the high-voltage pulse of 350V, and pulse width is 10uS.
Preferably, pulse shaping circuit comprises pulse shaper 7 and pulse converter 6, its successively signal connection.Because sampled signal is not correct square-wave pulse signal, technical grade single-chip microcomputer 1 can't correctly receive these signals, so must carry out shaping through pulse shaper 7, pulse width also still only has 10uS after the shaping, technical grade single-chip microcomputer 1 also can't normally receive, therefore also need to utilize pulse converter 6, these ultraviolet pulse signals that receive are converted to the pulse signal of dutycycle 50%, make things convenient for technical grade single-chip microcomputer 1 to receive.
Alarm relay output circuit 10 is provided with two-way.
Also be provided with switch power module 11, it uses DC-DC Switching Power Supply feed circuit, Power supply voltage range 18～30Vdc.Conventional flame detector uses linear voltage-stabilized power supply circuit, and power consumption is large, inefficiency, and when the detector quantity that connects was excessive, the moment of energising, easily causing powers held and can't stand excessive rush of current and protect, and whole system can't work.And the DC-DC Switching Power Supply, efficient is high, and wide input voltage range is fit to multiple occasion and uses.
The utility model list ultraviolet flame detector principle of work is by surveying the ultraviolet signal that radiates in the flame combustion process, to utilize these UV signal to judge the generation of fire, so can effectively detect the generation of general fire; During its work, at first by industrial technical grade single-chip microcomputer 1 initiatively excitation pulse to pulse producer 2, trigger pulse will be further through the conversion of pulse converter 3, become high-voltage invertedly to go out pulse and become the 350v high-voltage pulse through high-voltage inverter 4 and trigger Ultraviolet sensor photomultiplier 5; If Ultraviolet sensor photomultiplier 5 collects the UV signal that flame emission goes out, then UV signal is transferred to UV signal sampling module 8, UV signal sampling module 8 is shaped as the UV signal trigger pulse with sampled signal through pulse shaper 7 again, and then be converted to technical grade single-chip microcomputer 1 acceptable flame UV signal and be sent to technical grade single-chip microcomputer 1 through pulse converter 6, technical grade single-chip microcomputer 1 has obtained that the flame UV signal will immediately be sent to current loop circuit with alerting signal and the alarm relay circuit is reported to the police again, thus the generation of very first time control fire.Wherein Ultraviolet sensor photomultiplier 5 uses the power supply of driving frequency-conversion high-voltage pulse, establishment undesired signal, the reliability of raising product.And the high-voltage pulse of conventional ultraviolet flame is to use the hardware oscillator to carry out timing to produce, offering sensor uses, but in the flame combustion process, Fire Radiation UV signal out has certain frequency characteristic, and the autompulse circuit for generating can not effectively capture the frequency characteristic of flame.So the high-voltage pulse that uses technical grade single-chip microcomputer 1 to carry out initiatively occuring frequency conversion cooperates default software algorithm, parses the peculiar frequency of flame, the effectively generation of false alarm reduction.
The utility model list ultraviolet flame detector, can detect the UV signal in the general flame, therefore the scope of application is extremely wide, and use the Ultraviolet sensor photomultiplier of this sensitivity as the sensor of collection signal, strengthened the accuracy of signal, can guarantee effectively that the very first time sends signal.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a single ultraviolet flame detector is characterized in that: comprising: technical grade single-chip microcomputer, high-voltage pulse circuit, Ultraviolet sensor photomultiplier, UV signal sampling module, pulse shaping circuit and current loop circuit and alarm relay output circuit;
Wherein said technical grade single-chip microcomputer is by the UV signal in the high-voltage pulse circuit triggering Ultraviolet sensor photomultiplier collection flame;
The Ultraviolet sensor photomultiplier transfers to the UV signal sampling module with the UV signal that gathers, and the UV signal sampling module transfers to the technical grade single-chip microcomputer with the sampled signal of obtaining through pulse shaping circuit again;
The technical grade single-chip microcomputer will be according to sampled signal with communication to current loop circuit and alarm relay output circuit.
2. single ultraviolet flame detector as claimed in claim 1,, it is characterized in that: high-voltage pulse circuit comprises pulse producer, pulse converter and high-voltage inverter, its successively signal connect.
3. single ultraviolet flame detector as claimed in claim 1 or 2, it is characterized in that: pulse shaping circuit comprises pulse shaper and pulse converter, its successively signal connect.
4. single ultraviolet flame detector as claimed in claim 1 or 2, it is characterized in that: the alarm relay output circuit is provided with two-way.
5. single ultraviolet flame detector as claimed in claim 1 is characterized in that: also be provided with switch power module.
6. single ultraviolet flame detector as claimed in claim 1 is characterized in that: current loop circuit is the output of 4～20mA electric current loop interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204268646U CN202748907U (en) | 2012-08-27 | 2012-08-27 | Single ultraviolet flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204268646U CN202748907U (en) | 2012-08-27 | 2012-08-27 | Single ultraviolet flame detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202748907U true CN202748907U (en) | 2013-02-20 |
Family
ID=47708270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204268646U Expired - Fee Related CN202748907U (en) | 2012-08-27 | 2012-08-27 | Single ultraviolet flame detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202748907U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10739192B1 (en) | 2019-04-02 | 2020-08-11 | Honeywell International Inc. | Ultraviolet flame sensor with dynamic excitation voltage generation |
-
2012
- 2012-08-27 CN CN2012204268646U patent/CN202748907U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10739192B1 (en) | 2019-04-02 | 2020-08-11 | Honeywell International Inc. | Ultraviolet flame sensor with dynamic excitation voltage generation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20170827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |