CN204329059U - Flame monitor - Google Patents
Flame monitor Download PDFInfo
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- CN204329059U CN204329059U CN201420721777.2U CN201420721777U CN204329059U CN 204329059 U CN204329059 U CN 204329059U CN 201420721777 U CN201420721777 U CN 201420721777U CN 204329059 U CN204329059 U CN 204329059U
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- resistance
- power supply
- negative pole
- zener diode
- ultraviolet light
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Abstract
The utility model discloses a kind of flame monitor, the positive pole of ultraviolet light sensing tube is connected to the positive pole of power supply successively by resistance R1, R2, R3, the negative pole of ultraviolet light sensing tube is connected to the negative pole of power supply by resistance R8 and Zener diode D1 successively and power supply is connected with the positive pole of D1, the negative pole that negative pole is connected between R2 and R3, positive pole is connected to power supply of D2; Electric capacity C1 and power sources in parallel, the negative pole that one end is connected to the positive pole of photosensitive Zener diode, the other end is connected to power supply of electric capacity C2, the negative pole that one end is connected to the negative pole of photosensitive Zener diode, the other end is connected to power supply of electric capacity C3; The colelctor electrode of triode T is connected to RB2 pin by resistance R6 is connected between resistance R1 and R2, emitter stage is connected to power supply negative pole, base stage by resistance R7, RA4 pin is connected between resistance R8 and Zener diode D1, and the RB2 pin of single-chip microcomputer switches between high level and low level with predeterminated frequency.By the utility model, ultraviolet light sensing tube service life can be extended.
Description
Technical field
The utility model 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.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of flame monitor that can extend ultraviolet light sensing tube service life.
Therefore, the technical solution of the utility model 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 utility model, 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 utility model, 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 utility model embodiment.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model 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, according to the flame monitor of embodiment of the present utility model, comprise 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 utility model, 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 utility model, 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 utility model 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 utility model, but this embodiment is all included within scope of the present utility model.
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 |
|---|---|---|---|
| CN201420721777.2U CN204329059U (en) | 2014-11-26 | 2014-11-26 | Flame monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721777.2U CN204329059U (en) | 2014-11-26 | 2014-11-26 | Flame monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204329059U true CN204329059U (en) | 2015-05-13 |
Family
ID=53165413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420721777.2U Expired - Fee Related CN204329059U (en) | 2014-11-26 | 2014-11-26 | Flame monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204329059U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373952A (en) * | 2014-11-26 | 2015-02-25 | 天津安节特电子仪表有限公司 | Flame monitor |
-
2014
- 2014-11-26 CN CN201420721777.2U patent/CN204329059U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373952A (en) * | 2014-11-26 | 2015-02-25 | 天津安节特电子仪表有限公司 | Flame monitor |
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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: 20150513 Termination date: 20151126 |