CN103868878A - Gas detection instrument - Google Patents
Gas detection instrument Download PDFInfo
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- CN103868878A CN103868878A CN201410113108.1A CN201410113108A CN103868878A CN 103868878 A CN103868878 A CN 103868878A CN 201410113108 A CN201410113108 A CN 201410113108A CN 103868878 A CN103868878 A CN 103868878A
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Abstract
The invention discloses a gas detection instrument. The instrument comprises a singlechip, a power supply, an audible and visual alarm, a clock chip, a data storage device, an analog/digital (A/D) converter, an infrared sensor, a voltage stabilizing circuit and an input/output (I/O) extended chip, wherein the audible and visual alarm, the clock chip, the data storage device, the I/O extended chip and the A/D converter are connected with the singlechip; the A/D converter is connected with the infrared sensor; the power supply is connected with the voltage stabilizing circuit; a keyboard and a printer are connected to the I/O extended chip. According to the principle, the condition of carbon dioxide in a greenhouse can be accurately detected through the infrared sensor, and gas in the greenhouse is timely supplemented or released, so that the optimal content of carbon dioxide in the greenhouse is achieved, and the yield of vegetables is improved.
Description
Technical field
The present invention relates to field of gas detection, be specifically related to the instrument detecting for gas.
Background technology
Planting vegetable in greenhouse is a kind of more common technology, and it has good heat-insulating property, and it is loved by the people, because all can have at any time the vegetables of anti-season.In the ordinary course of things, it is main structural framework that booth vegetable all adopts bamboo and steel, then covers last layer or multi-layer heat preserving plastic sheeting in the above, and such easy structure just produces a complete greenhouse space.Plastic sheeting can effectively prevent that the carbon dioxide producing in vegetable growth process runs off, to reach the heat insulation effect needing in booth.An importance that wherein affects booth vegetable output is exactly rationally to utilize canopy gas, regulation and control humiture.Booth vegetable, in planting process, due to airtight in booth, easily produces some objectionable impuritiess, has damaged the speed of growth of vegetables.Therefore, correctly control canopy gas, and rationally use canopy gas.Vegetables in booth comparatively lack carbon dioxide in the morning, should suitably supplement CO gas fertilizer, promote the growth of vegetables.When noon, temperature was higher, suitably open ventilating opening, take a breath, avoid harmful gas injury vegetables.The gas content of measuring in booth now mainly detects by traditional PH test paper, and testing result is inaccurate also cumbersome.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, be provided for the instrument that gas detects, can accurately detect the situation of carbon dioxide in booth by infrared sensor, and in time the gas in booth is supplemented or discharge, make to reach best carbon dioxide content in booth, improve the output of vegetables.
For solving above-mentioned technical matters, the present invention is by the following technical solutions: the instrument detecting for gas, comprise single-chip microcomputer, power supply, audible-visual annunciator, clock chip, data-carrier store, A/D converter, infrared sensor, mu balanced circuit and I/O extended chip, described audible-visual annunciator, clock chip, data-carrier store, mu balanced circuit, I/O extended chip and A/D converter are all connected single-chip microcomputer; Described A/D converter also connects infrared sensor; Described power supply connects mu balanced circuit; On described I/O extended chip, also connect keyboard and printer.The model of infrared sensor is wherein LHI778 or KP506B, and the model of audible-visual annunciator is LTE-5101J, and the model of data-carrier store is EEPROM AT24C02, and I/O extended chip model is GM8164.
Described mu balanced circuit is adjustable mu balanced circuit, comprise resistance R 1, resistance R 2, resistance R 3 and controllable accurate source of stable pressure C, the negative electrode K of controllable accurate source of stable pressure C wherein and with reference to contact resistance R2 between utmost point R, contact resistance R3 between the reference utmost point R of controllable accurate source of stable pressure C and anode A, also contact resistance R1 of the negative electrode of controllable accurate source of stable pressure C, between the anode A of resistance R 1 and controllable accurate source of stable pressure C, being power input, is power output end between the negative electrode K of controllable accurate source of stable pressure C and anode A.
The model of controllable accurate source of stable pressure C is TL431, and wherein mu balanced circuit two output end voltages are 2.5(R2+R3)/R3 volt, can change output reference voltage size if change the resistance of R2.The size of R2 and the R3 as required size of reference voltage arranges, and R1 is mainly used in dividing potential drop protection controllable accurate source of stable pressure C.
The model of described controllable accurate source of stable pressure C is TL431.
On described single-chip microcomputer, also connect LCD liquid crystal display.
The model of described clock chip is DS1307.
Described single-chip microcomputer model is AT89S51.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention by infrared sensor can Measurement accuracy booth vegetable in carbon dioxide content, and in time the gas in booth is supplemented or discharge, make to reach in booth best carbon dioxide content, improve the output of vegetables, the method is simple and practical, saves in the past PH test paper and measures inaccurate and measure loaded down with trivial details defect.
2, the present invention in power supply after mu balanced circuit, pass to again single-chip microcomputer, ensure the stable of service voltage, extend the serviceable life of single-chip microcomputer, the TL431 wherein using in mu balanced circuit is controllable accurate source of stable pressure, its output voltage just can be set to 2.5V to any value within the scope of 36V arbitrarily with two resistance, uses more flexible.
Brief description of the drawings
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the mu balanced circuit figure in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited to this.
Embodiment:
As shown in Figure 1-2, the present invention includes single-chip microcomputer, power supply, audible-visual annunciator, clock chip, data-carrier store, A/D converter, infrared sensor, mu balanced circuit and I/O extended chip, on single-chip microcomputer, also connect LCD liquid crystal display, the model of clock chip is DS1307, and single-chip microcomputer model is AT89S51.
Audible-visual annunciator, clock chip, data-carrier store, mu balanced circuit, I/O extended chip and the A/D converter of the present embodiment are all connected single-chip microcomputer; A/D converter also connects infrared sensor; Power supply connects mu balanced circuit; On I/O extended chip, also connect keyboard and printer.The mu balanced circuit of this example is adjustable mu balanced circuit, comprise resistance R 1, resistance R 2, resistance R 3 and controllable accurate source of stable pressure C, the negative electrode K of controllable accurate source of stable pressure C wherein and with reference to contact resistance R2 between utmost point R, contact resistance R3 between the reference utmost point R of controllable accurate source of stable pressure C and anode A, also contact resistance R1 of the negative electrode of controllable accurate source of stable pressure C, between the anode A of resistance R 1 and controllable accurate source of stable pressure C, it is power input, between the negative electrode K of controllable accurate source of stable pressure C and anode A, be power output end, the model of controllable accurate source of stable pressure C is TL431.
The model of infrared sensor is wherein LHI778 or KP506B, and the model of audible-visual annunciator is LTE-5101J, and the model of data-carrier store is EEPROM AT24C02, and I/O extended chip model is GM8164.The model of controllable accurate source of stable pressure C is TL431, and wherein mu balanced circuit two output end voltages are 2.5(R2+R3)/R3 volt, can change output reference voltage size if change the resistance of R2.The size of R2 and the R3 as required size of reference voltage arranges, and R1 is mainly used in dividing potential drop protection controllable accurate source of stable pressure C.
The carbon dioxide situation in booth can accurately be detected and by A/D converter, information be passed to single-chip microcomputer by infrared sensor, single-chip microcomputer is stored and is passed to LCD liquid crystal display and shows to data, the too high audible-visual annunciator of carbon dioxide content will sounding, now can discharge and make to reach in booth best carbon dioxide content the gas in booth, promote the photosynthesis of vegetables, improve the output of vegetables, the method is simple and practical, saves in the past PH test paper and measures inaccurate and measure loaded down with trivial details defect.Power supply is passed to single-chip microcomputer after mu balanced circuit again, ensure the stable of service voltage, extend the serviceable life of single-chip microcomputer, the TL431 wherein using in mu balanced circuit is controllable accurate source of stable pressure, its output voltage just can be set to 2.5V to any value within the scope of 36V arbitrarily with two resistance, uses more flexible.
Just can realize as mentioned above this invention.
Claims (6)
1. the instrument detecting for gas, it is characterized in that: comprise single-chip microcomputer, power supply, audible-visual annunciator, clock chip, data-carrier store, A/D converter, infrared sensor, mu balanced circuit and I/O extended chip, described audible-visual annunciator, clock chip, data-carrier store, mu balanced circuit, I/O extended chip and A/D converter are all connected single-chip microcomputer; Described A/D converter also connects infrared sensor; Described power supply connects mu balanced circuit; On described I/O extended chip, also connect keyboard and printer.
2. the instrument detecting for gas according to claim 1, it is characterized in that: described mu balanced circuit is adjustable mu balanced circuit, comprise resistance R 1, resistance R 2, resistance R 3 and controllable accurate source of stable pressure C, the negative electrode K of controllable accurate source of stable pressure C wherein and with reference to contact resistance R2 between utmost point R, contact resistance R3 between the reference utmost point R of controllable accurate source of stable pressure C and anode A, also contact resistance R1 of the negative electrode of controllable accurate source of stable pressure C, between the anode A of resistance R 1 and controllable accurate source of stable pressure C, it is power input, between the negative electrode K of controllable accurate source of stable pressure C and anode A, it is power output end.
3. the instrument detecting for gas according to claim 2, is characterized in that: the model of described controllable accurate source of stable pressure C is TL431.
4. the instrument detecting for gas according to claim 1, is characterized in that: on described single-chip microcomputer, also connect LCD liquid crystal display.
5. the instrument detecting for gas according to claim 1, is characterized in that: the model of described clock chip is DS1307.
6. the instrument detecting for gas according to claim 1, is characterized in that: described single-chip microcomputer model is AT89S51.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410113108.1A CN103868878A (en) | 2014-03-25 | 2014-03-25 | Gas detection instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410113108.1A CN103868878A (en) | 2014-03-25 | 2014-03-25 | Gas detection instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103868878A true CN103868878A (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410113108.1A Pending CN103868878A (en) | 2014-03-25 | 2014-03-25 | Gas detection instrument |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003172695A (en) * | 2001-12-07 | 2003-06-20 | Yazaki Corp | Method of calibrating carbon dioxide detector |
| CN2650256Y (en) * | 2003-11-10 | 2004-10-20 | 张焕义 | Intelligent methane-warning lamp for mine |
| CN200972475Y (en) * | 2006-10-27 | 2007-11-07 | 北京康尔兴科技发展有限公司 | Air quality monitor |
| JP2008281428A (en) * | 2007-05-10 | 2008-11-20 | Toyota Boshoku Corp | Carbon dioxide gas detector |
| CN202330344U (en) * | 2011-11-16 | 2012-07-11 | 淮南市松江电子有限责任公司 | Methane and carbon dioxide measurer |
| CN202393732U (en) * | 2011-11-16 | 2012-08-22 | 淮南市松江电子有限责任公司 | Multi-parameter gas measuring apparatus |
| CN103105469A (en) * | 2013-02-05 | 2013-05-15 | 贝谷科技股份有限公司 | Online monitoring device for automobile interior air quality monitoring |
| CN203786032U (en) * | 2014-03-25 | 2014-08-20 | 成都国科海博信息技术股份有限公司 | Carbon dioxide gas detector |
-
2014
- 2014-03-25 CN CN201410113108.1A patent/CN103868878A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003172695A (en) * | 2001-12-07 | 2003-06-20 | Yazaki Corp | Method of calibrating carbon dioxide detector |
| CN2650256Y (en) * | 2003-11-10 | 2004-10-20 | 张焕义 | Intelligent methane-warning lamp for mine |
| CN200972475Y (en) * | 2006-10-27 | 2007-11-07 | 北京康尔兴科技发展有限公司 | Air quality monitor |
| JP2008281428A (en) * | 2007-05-10 | 2008-11-20 | Toyota Boshoku Corp | Carbon dioxide gas detector |
| CN202330344U (en) * | 2011-11-16 | 2012-07-11 | 淮南市松江电子有限责任公司 | Methane and carbon dioxide measurer |
| CN202393732U (en) * | 2011-11-16 | 2012-08-22 | 淮南市松江电子有限责任公司 | Multi-parameter gas measuring apparatus |
| CN103105469A (en) * | 2013-02-05 | 2013-05-15 | 贝谷科技股份有限公司 | Online monitoring device for automobile interior air quality monitoring |
| CN203786032U (en) * | 2014-03-25 | 2014-08-20 | 成都国科海博信息技术股份有限公司 | Carbon dioxide gas detector |
Non-Patent Citations (1)
| Title |
|---|
| 杨帮文: "《新型实用电源电路集锦》", 31 October 1999, 人民邮电出版社 * |
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Application publication date: 20140618 |