CN105203180A - Water level detection circuit of saturated steam generator - Google Patents
Water level detection circuit of saturated steam generator Download PDFInfo
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- CN105203180A CN105203180A CN201510587372.3A CN201510587372A CN105203180A CN 105203180 A CN105203180 A CN 105203180A CN 201510587372 A CN201510587372 A CN 201510587372A CN 105203180 A CN105203180 A CN 105203180A
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- resistance
- photoelectrical coupler
- microprocessor
- water level
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Abstract
A water level detection circuit of a saturated steam generator comprises a transformer (T1), a high water level probe (P1), a low water level probe (P2), a first capacitor (C1), a second capacitor (C2), a first photoelectric coupler (U1), a second photoelectric coupler (U2), a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4) and a microprocessor (U3). Alternating current is adopted to detect a water level signal, the probes are prevented from being easily corroded, meanwhile the photoelectric couplers are adopted for isolation, and the reliability and antijamming capability of the water level detection circuit are improved.
Description
Technical field
The present invention relates to a kind of water level detection circuit, especially a kind of water level detection circuit of saturated steam generator.
Background technology
Owing to saving water resource, saturated steam generator is widely used in cleaning industry, and the detection of saturated steam generator middle water level is the very important link of moisturizing control, very high to reliability requirement, the easy loss of existing saturated steam generator water level detection circuit ubiquity, the problem such as sensitivity is low, poor reliability, detection probe electrolytic corrosion are serious.
Summary of the invention
The object of the present invention is to provide a kind of water level detection circuit, especially a kind of water level detection circuit of saturated steam generator, the water level detecting function of saturated steam generator can be realized.
Technical scheme of the present invention is:
A water level detection circuit for saturated steam generator, comprises transformer, high-level probe, low-level probe, the first electric capacity, the second electric capacity, the first photoelectrical coupler, the second photoelectrical coupler, first resistance, the second resistance, the 3rd resistance, the 4th resistance, microprocessor; The input end of transformer connects interchange AC220V civil power, and one end of the output of transformer connects the second resistance and the 4th resistance respectively, and other one end of the output of transformer connects the shell of saturated steam generator boiler, is connected to electric power system protective grounding simultaneously; Second resistance is connected with an input end of the first photoelectrical coupler, and another input end of the first photoelectrical coupler is connected with high-level probe; 4th resistance is connected with an input end of the second photoelectrical coupler, and another input end of the second photoelectrical coupler is connected with low-level probe; The output terminal transistor collector of the first photoelectrical coupler is connected with one end of the first resistance, be connected to the positive pole of the first electric capacity and the numeral input I/O port of microprocessor simultaneously, other one end of first resistance is connected with the power supply vdd terminal of microprocessor, and the negative pole of the first electric capacity is connected to the earth terminal of microprocessor; The output terminal transistor collector of the second photoelectrical coupler is connected with one end of the 3rd resistance, be connected to the positive pole of the second electric capacity and the numeral input I/O port of microprocessor simultaneously, other one end of 3rd resistance is connected with the power supply vdd terminal of microprocessor, and the negative pole of the second electric capacity is connected to the earth terminal of microprocessor.
Described first photoelectrical coupler and the second photoelectrical coupler all adopt two directions' inputing type electric coupler opto-coupler chip.
Described first photoelectrical coupler and the second photoelectrical coupler are TLP626 type electric coupler opto-coupler chip.
The invention has the beneficial effects as follows:
The present invention adopts alternating current probe water level signal, avoids probe corrosion-vulnerable, adopts electric coupler optocoupler to isolate simultaneously, improves reliability and the antijamming capability of water level detection circuit.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As Fig. 1, a kind of water level detection circuit of saturated steam generator, comprise transformer (T1), high-level probe P1, low-level probe P2, the first electric capacity C1, the second electric capacity C2, the first photoelectrical coupler U1, the second photoelectrical coupler U2, first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, microprocessor U3; The input end of transformer T1 connects interchange AC220V civil power, one end of the output of transformer T1 connects the second resistance R2 and the 4th resistance R4 respectively, other one end of the output of transformer T1 connects the shell of saturated steam generator boiler U4, is connected to electric power system protective grounding simultaneously; Second resistance R2 is connected with an input end of the first photoelectrical coupler U1, and another input end of the first photoelectrical coupler U1 is connected with high-level probe P1; 4th resistance R4 is connected with an input end of the second photoelectrical coupler U2, and another input end of the second photoelectrical coupler U2 is connected with low-level probe P2; The output terminal transistor collector of the first photoelectrical coupler U1 is connected with one end of the first resistance R1, be connected to the positive pole of the first electric capacity C1 and the numeral input I/O port of microprocessor U3 simultaneously, other one end of first resistance R1 is connected with the power supply vdd terminal of microprocessor U3, and the negative pole of the first electric capacity C1 is connected to the earth terminal of microprocessor U3; The output terminal transistor collector of the second photoelectrical coupler U2 is connected with one end of the 3rd resistance R3, be connected to the positive pole of the second electric capacity C2 and the numeral input I/O port of microprocessor U3 simultaneously, other one end of 3rd resistance R3 is connected with the power supply vdd terminal of microprocessor U3, and the negative pole of the second electric capacity C2 is connected to the earth terminal of microprocessor.
Described first photoelectrical coupler U1 and the second photoelectrical coupler U2 all adopts two directions' inputing type electric coupler opto-coupler chip.
Described first photoelectrical coupler U1 and the second photoelectrical coupler U2 is TLP626 type electric coupler opto-coupler chip.
In concrete enforcement, transformer T1 input connects the input of 220V mains, exporting effective value is the alternating voltage of 12V, 4th resistance R4 and the second resistance R2 generally selects resistance to be 12K Ω, photoelectrical coupler U1 can select chip TLP620 or TLP626, photoelectrical coupler U2 can select chip TLP620 or TLP626, voltage VDD voltage-to-ground is DC5V, first resistance R1 and the 3rd resistance R3 resistance are typically chosen in 10K Ω, first electric capacity C1 and the second electric capacity C2 selects the alminium electrolytic condenser of 10uF, the single-chip microcomputer etc. of the optional DC5V voltage of microprocessor U3.
Embodiment recited above is only be described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design concept prerequisite of the present invention; the various modification that in this area, common engineering technical personnel make technical scheme of the present invention and improvement; all should fall into protection scope of the present invention, the technology contents of request protection of the present invention is all recorded in detail in the claims.
Claims (3)
1. the water level detection circuit of a saturated steam generator, it is characterized in that: comprise transformer (T1), high-level probe (P1), low-level probe (P2), first electric capacity (C1), the second electric capacity (C2), first photoelectrical coupler (U1), the second photoelectrical coupler (U2), first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), microprocessor (U3); The input end of transformer (T1) connects interchange AC220V civil power, one end of the output of transformer (T1) connects the second resistance (R2) and the 4th resistance (R4) respectively, other one end of the output of transformer (T1) connects the shell of saturated steam generator boiler (U4), is connected to electric power system protective grounding simultaneously; Second resistance (R2) is connected with an input end of the first photoelectrical coupler (U1), and another input end of the first photoelectrical coupler (U1) is connected with high-level probe (P1); 4th resistance (R4) is connected with an input end of the second photoelectrical coupler (U2), and another input end of the second photoelectrical coupler (U2) is connected with low-level probe (P2); The output terminal transistor collector of the first photoelectrical coupler (U1) is connected with one end of the first resistance (R1), be connected to the positive pole of the first electric capacity (C1) and the numeral input I/O port of microprocessor (U3) simultaneously, other one end of first resistance (R1) is connected with the power supply vdd terminal of microprocessor (U3), and the negative pole of the first electric capacity (C1) is connected to the earth terminal of microprocessor (U3); The output terminal transistor collector of the second photoelectrical coupler (U2) is connected with one end of the 3rd resistance (R3), be connected to the positive pole of the second electric capacity (C2) and the numeral input I/O port of microprocessor (U3) simultaneously, other one end of 3rd resistance (R3) is connected with the power supply vdd terminal of microprocessor (U3), and the negative pole of the second electric capacity (C2) is connected to the earth terminal of microprocessor.
2. the water level detection circuit of a kind of saturated steam generator according to claim 1, is characterized in that: described first photoelectrical coupler (U1) and the second photoelectrical coupler (U2) all adopt two directions' inputing type electric coupler opto-coupler chip.
3. the water level detection circuit of a kind of saturated steam generator according to claim 1, is characterized in that: described first photoelectrical coupler (U1) and the second photoelectrical coupler (U2) are TLP626 type electric coupler opto-coupler chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510587372.3A CN105203180A (en) | 2015-09-16 | 2015-09-16 | Water level detection circuit of saturated steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510587372.3A CN105203180A (en) | 2015-09-16 | 2015-09-16 | Water level detection circuit of saturated steam generator |
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| Publication Number | Publication Date |
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| CN105203180A true CN105203180A (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510587372.3A Pending CN105203180A (en) | 2015-09-16 | 2015-09-16 | Water level detection circuit of saturated steam generator |
Country Status (1)
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| CN (1) | CN105203180A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115566A (en) * | 2015-10-08 | 2015-12-02 | 厦门拓宝科技有限公司 | Detection instrument for water level of water tank |
| CN105865575A (en) * | 2016-05-13 | 2016-08-17 | 珠海格力电器股份有限公司 | Electrode type water level switch, water heater and water level detection method thereof |
| CN106441501A (en) * | 2016-09-05 | 2017-02-22 | 海尔优家智能科技（北京）有限公司 | Water fullness detection circuit |
Citations (5)
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| CN2293055Y (en) * | 1996-11-01 | 1998-09-30 | 中国科学院安徽光学精密机械研究所 | Opto-electronic coupled AC multi-liquid level measuring device |
| CN2702176Y (en) * | 2003-01-14 | 2005-05-25 | 华南理工大学 | Electrode type water level sensor circuit for oil-burning boiler control device |
| CN202182753U (en) * | 2011-06-20 | 2012-04-04 | 上海端力智能电控科技有限公司 | Electronic type liquid level controller probe anti-electrolysis circuit |
| CN204241979U (en) * | 2014-11-03 | 2015-04-01 | 成都龙腾中远信息技术有限公司 | A kind of low cost water-level control circuit |
| CN205209592U (en) * | 2015-09-16 | 2016-05-04 | 湖南中航精工有限公司 | Water level detection circuit of saturated steam generator |
-
2015
- 2015-09-16 CN CN201510587372.3A patent/CN105203180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293055Y (en) * | 1996-11-01 | 1998-09-30 | 中国科学院安徽光学精密机械研究所 | Opto-electronic coupled AC multi-liquid level measuring device |
| CN2702176Y (en) * | 2003-01-14 | 2005-05-25 | 华南理工大学 | Electrode type water level sensor circuit for oil-burning boiler control device |
| CN202182753U (en) * | 2011-06-20 | 2012-04-04 | 上海端力智能电控科技有限公司 | Electronic type liquid level controller probe anti-electrolysis circuit |
| CN204241979U (en) * | 2014-11-03 | 2015-04-01 | 成都龙腾中远信息技术有限公司 | A kind of low cost water-level control circuit |
| CN205209592U (en) * | 2015-09-16 | 2016-05-04 | 湖南中航精工有限公司 | Water level detection circuit of saturated steam generator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115566A (en) * | 2015-10-08 | 2015-12-02 | 厦门拓宝科技有限公司 | Detection instrument for water level of water tank |
| CN105865575A (en) * | 2016-05-13 | 2016-08-17 | 珠海格力电器股份有限公司 | Electrode type water level switch, water heater and water level detection method thereof |
| CN106441501A (en) * | 2016-09-05 | 2017-02-22 | 海尔优家智能科技（北京）有限公司 | Water fullness detection circuit |
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| C06 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 415200 Changde City Economic Development Zone in Hunan province Linli Anfu county industrial Applicant after: HUNAN AVIC SEIKO CO. LTD. Address before: An Industrial Park Economic Development Zone, Yongzhou City, Hunan province Linli County 415200 Applicant before: HUNAN AVIC SEIKO CO. LTD. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |
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| RJ01 | Rejection of invention patent application after publication |