CN104373952A - Flame monitor - Google Patents
Flame monitor Download PDFInfo
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- CN104373952A CN104373952A CN201410693220.7A CN201410693220A CN104373952A CN 104373952 A CN104373952 A CN 104373952A CN 201410693220 A CN201410693220 A CN 201410693220A CN 104373952 A CN104373952 A CN 104373952A
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- resistance
- power supply
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- resistor
- zener diode
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Abstract
The invention discloses a flame monitor. The positive electrode of an ultraviolet photosensitive tube is connected with the positive electrode of a power source through a resistor R1, a resistor R2 and a resistor R3 in sequence. The negative electrode of the ultraviolet photosensitive tube is connected to the negative electrode of the power source through a resistor R8 and a voltage stabilizing diode D1 in sequence, and the power source is connected with the positive electrode of the voltage stabilizing diode D1. The negative electrode of a voltage stabilizing diode D2 is connected between the resistor R2 and the resistor R3. The positive electrode of the voltage stabilizing diode D2 is connected to the negative electrode of the power source. A capacitor C1 and the power source are connected in parallel. One end of a capacitor C2 is connected to the positive electrode of a photosensitive voltage stabilizing diode, and the other end of the capacitor C2 is connected to the negative electrode of the power source. One end of a capacitor C3 is connected to the negative electrode of the photosensitive voltage stabilizing diode, and the other end of the capacitor C3 is connected to the negative electrode of the power source. The collector electrode of a triode T is connected between the resistor R1 and the resistor R2 through a resistor R6, the emitting electrode of the triode T is connected to the negative electrode of the power source, the base electrode of the triode T is connected to an RB2 pin through a resistor R7, an RA4 pin is connected between a resistor R8 and the voltage stabilizing diode D1, and an RB2 pin of a single chip microcomputer is switched between a high level and a low level at preset frequency. By means of the flame monitor, the service life of the ultraviolet photosensitive tube can be prolonged.
Description
Technical field
The present invention relates to flame monitoring apparatus field, in particular to a kind of flame monitor.
Background technology
The flame monitor principle of employing ultraviolet light sensing tube is, when ultraviolet light sensing tube runs into UV light irradiates, if its both end voltage is 320V, and glow discharge phenomenon will occur.In current flame monitor, there is life-span shorter problem in ultraviolet light sensing tube, has obvious negative effect to the cost of whole watch-dog and practicality.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of flame monitor that can extend ultraviolet light sensing tube service life.
Therefore, technical scheme of the present invention is as follows:
A kind of flame monitor, comprises power supply, ultraviolet light sensing tube, resistance R1 ~ R8, electric capacity C1 ~ C3, Zener diode D1, D2, triode T and PIC single chip microcomputer, wherein:
The positive pole of described ultraviolet light sensing tube is connected to the positive pole of power supply successively by resistance R1, R2, R3, the negative pole of described ultraviolet light sensing tube is connected to the negative pole of described power supply by resistance R8 and Zener diode D1 successively and described power supply is connected with the positive pole of Zener diode D1, the negative pole that negative pole is connected between resistance R2 and R3, positive pole is connected to described power supply of Zener diode D2;
Electric capacity C1 and power sources in parallel, the negative pole that one end of electric capacity C2 is connected to the positive pole of described photosensitive Zener diode, the other end is connected to described power supply, the negative pole that one end is connected to the negative pole of described photosensitive Zener diode, the other end is connected to described power supply of electric capacity C3;
One end of resistance R4 is connected between resistance R1 and R2, the other end is connected to the negative pole of described power supply by resistance R5 and resistance R5 is adjustable resistance;
The colelctor electrode of triode T is connected to the RB2 pin of described PIC single chip microcomputer by resistance R7 by resistance R6 is connected between resistance R1 and R2, emitter stage is connected to described power supply negative pole, base stage, the RA4 pin of described single-chip microcomputer is connected between resistance R8 and Zener diode D1, and the RB2 pin of described single-chip microcomputer switches between high level and low level with predeterminated frequency.
In the present invention, by setting up triode T and PIC single chip microcomputer, make RB2=0V (low level), at this moment triode is closed, and ultraviolet light sensing tube both end voltage is 320V, can normally work; Make RB2=1V (high level), triode T conducting, is pulled down to below 150V by ultraviolet light sensing tube both end voltage, even if now ultraviolet light sensing tube receives Ultraviolet radiation and also glow discharge phenomenon can not occur, is namely in resting state.Constantly switch with certain frequency (such as every 0.5S switches once) between low and high level by arranging RB2 pin in single-chip microcomputer, just achieve the intermittent work of ultraviolet light sensing tube, avoid while routinely carrying out glow discharge and also can ensure the normal monitoring of flame controller to flame.By the present invention, the average life span of ultraviolet light sensing tube reaches 16000 hours, is in the leading level in the world.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the flame monitor according to the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
As shown in Figure 1, flame monitor according to an embodiment of the invention, comprises power supply, ultraviolet light sensing tube, resistance R1 ~ R8, electric capacity C1 ~ C3, Zener diode D1, D2, triode T and PIC single chip microcomputer, wherein:
The positive pole of described ultraviolet light sensing tube is connected to the positive pole of power supply successively by resistance R1, R2, R3, the negative pole of described ultraviolet light sensing tube is connected to the negative pole of described power supply by resistance R8 and Zener diode D1 successively and described power supply is connected with the positive pole of Zener diode D1, the negative pole that negative pole is connected between resistance R2 and R3, positive pole is connected to described power supply of Zener diode D2;
Electric capacity C1 and power sources in parallel, the negative pole that one end of electric capacity C2 is connected to the positive pole of described photosensitive Zener diode, the other end is connected to described power supply, the negative pole that one end is connected to the negative pole of described photosensitive Zener diode, the other end is connected to described power supply of electric capacity C3;
One end of resistance R4 is connected between resistance R1 and R2, the other end is connected to the negative pole of described power supply by resistance R5 and resistance R5 is adjustable resistance;
The colelctor electrode of triode T is connected to the RB2 pin of described PIC single chip microcomputer by resistance R7 by resistance R6 is connected between resistance R1 and R2, emitter stage is connected to described power supply negative pole, base stage, the RA4 pin of described single-chip microcomputer is connected between resistance R8 and Zener diode D1, and the RB2 pin of described single-chip microcomputer switches between high level and low level with predeterminated frequency.
Wherein, the burning voltage of D1 is the burning voltage of 350V, D2 is 5V.
In the present invention, by setting up triode T and PIC single chip microcomputer, make RB2=0V (low level), at this moment triode is closed, and ultraviolet light sensing tube both end voltage is 320V, can normally work, and glow discharge pulse can be detected at B point; Make RB2=1V (high level), triode T conducting, is pulled down to below 150V by ultraviolet light sensing tube both end voltage, even if now ultraviolet light sensing tube receives Ultraviolet radiation and also glow discharge phenomenon can not occur, is namely in resting state.Constantly switch with certain frequency (such as every 0.5S switches once) between low and high level by arranging RB2 pin in single-chip microcomputer, just achieve the intermittent work of ultraviolet light sensing tube, avoid while routinely carrying out glow discharge and also can ensure the normal monitoring of flame controller to flame.By the present invention, the average life span of ultraviolet light sensing tube reaches 16000 hours, is in the leading level in the world.
In sum, content of the present invention is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present invention, but this embodiment all comprises within the scope of the present invention.
Claims (1)
1. a flame monitor, is characterized in that, comprises power supply, ultraviolet light sensing tube, resistance R1 ~ R8, electric capacity C1 ~ C3, Zener diode D1, D2, triode T and PIC single chip microcomputer, wherein:
The positive pole of described ultraviolet light sensing tube is connected to the positive pole of power supply successively by resistance R1, R2, R3, the negative pole of described ultraviolet light sensing tube is connected to the negative pole of described power supply by resistance R8 and Zener diode D1 successively and described power supply is connected with the positive pole of Zener diode D1, the negative pole that negative pole is connected between resistance R2 and R3, positive pole is connected to described power supply of Zener diode D2;
Electric capacity C1 and power sources in parallel, the negative pole that one end of electric capacity C2 is connected to the positive pole of described photosensitive Zener diode, the other end is connected to described power supply, the negative pole that one end is connected to the negative pole of described photosensitive Zener diode, the other end is connected to described power supply of electric capacity C3;
One end of resistance R4 is connected between resistance R1 and R2, the other end is connected to the negative pole of described power supply by resistance R5 and resistance R5 is adjustable resistance;
The colelctor electrode of triode T is connected to the RB2 pin of described PIC single chip microcomputer by resistance R7 by resistance R6 is connected between resistance R1 and R2, emitter stage is connected to described power supply negative pole, base stage, the RA4 pin of described single-chip microcomputer is connected between resistance R8 and Zener diode D1, and the RB2 pin of described single-chip microcomputer switches between high level and low level with predeterminated frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693220.7A CN104373952A (en) | 2014-11-26 | 2014-11-26 | Flame monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693220.7A CN104373952A (en) | 2014-11-26 | 2014-11-26 | Flame monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104373952A true CN104373952A (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410693220.7A Pending CN104373952A (en) | 2014-11-26 | 2014-11-26 | Flame monitor |
Country Status (1)
| Country | Link |
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| CN (1) | CN104373952A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342744A (en) * | 2017-06-29 | 2017-11-10 | 成都旭光光电技术有限责任公司 | A kind of electric charge release circuit and ultraviolet light detection module for ultraviolet phototube |
| CN112591334A (en) * | 2020-12-17 | 2021-04-02 | 马宏 | Knee-touch type control circuit for medical sewage garbage can |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2600928A (en) * | 1948-11-30 | 1952-06-17 | Wheelco Instr Company | Flame detector |
| JPH10253050A (en) * | 1997-03-13 | 1998-09-25 | Nippon Furnace Kogyo Kaisha Ltd | Flame detector |
| CN201383804Y (en) * | 2009-03-25 | 2010-01-13 | 温州市麦特力克电器有限公司 | Ultrasonic and infrared inductive switch |
| CN203278727U (en) * | 2013-05-24 | 2013-11-06 | 无锡商业职业技术学院 | Motor speed-regulating system |
| CN103560835A (en) * | 2013-10-31 | 2014-02-05 | 华北水利水电大学 | Information receiving device based on photosensitive tube and information receiving method thereof |
| CN204329059U (en) * | 2014-11-26 | 2015-05-13 | 天津安节特电子仪表有限公司 | Flame monitor |
-
2014
- 2014-11-26 CN CN201410693220.7A patent/CN104373952A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2600928A (en) * | 1948-11-30 | 1952-06-17 | Wheelco Instr Company | Flame detector |
| JPH10253050A (en) * | 1997-03-13 | 1998-09-25 | Nippon Furnace Kogyo Kaisha Ltd | Flame detector |
| CN201383804Y (en) * | 2009-03-25 | 2010-01-13 | 温州市麦特力克电器有限公司 | Ultrasonic and infrared inductive switch |
| CN203278727U (en) * | 2013-05-24 | 2013-11-06 | 无锡商业职业技术学院 | Motor speed-regulating system |
| CN103560835A (en) * | 2013-10-31 | 2014-02-05 | 华北水利水电大学 | Information receiving device based on photosensitive tube and information receiving method thereof |
| CN204329059U (en) * | 2014-11-26 | 2015-05-13 | 天津安节特电子仪表有限公司 | Flame monitor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342744A (en) * | 2017-06-29 | 2017-11-10 | 成都旭光光电技术有限责任公司 | A kind of electric charge release circuit and ultraviolet light detection module for ultraviolet phototube |
| CN107342744B (en) * | 2017-06-29 | 2023-08-15 | 成都紫外光电技术有限公司 | Charge release circuit for ultraviolet phototube and ultraviolet light detection module |
| CN112591334A (en) * | 2020-12-17 | 2021-04-02 | 马宏 | Knee-touch type control circuit for medical sewage garbage can |
| CN112591334B (en) * | 2020-12-17 | 2023-04-21 | 深圳市原动力运控技术有限公司 | Knee-touch type medical dirt dustbin control circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20170721 |