Circuit capable of accurately measuring AC source flame ion current
A technology of flame ion and current size, applied in the field of circuits, can solve problems such as the inability to solve the misjudgment of the flame needle and the inability to use the flame to monitor the combustion quality, and achieve the effect of good data basis.
Active Publication Date: 2013-10-02
佛山市赛扬电子科技有限公司
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Problems solved by technology
However, this method can only detect the qualitative characteristics of the flame signal, and solve the problem of whether the flame signal is present, and cannot be used to monitor the quality of flame combustion, that is, the combustion condition
In addition, because the DC signal flame detection method (applying a DC voltage signal between the flame and the ground) cannot solve the problem that the flame needle is prone to misjudgment in a wet state, this technology has been basically eliminated
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[0035] Another embodiment of the present invention: as figure 2 As shown, the output port C pin of the first operational amplifier U1A is connected to the common mode input port D pin of the second operational amplifier U2A; the common mode input port A pin of the first operational amplifier U1A is connected to the second operational amplifier U2A The E pin of the differential mode input port is connected.
[0036] Such as image 3 , Figure 4 As shown, the signal sampling circuit includes a FID, a first resistor R1, a second resistor R2, a sine wave AC signal source V1, a second capacitor C2 and a resistor R0;
[0037] The FID, the first resistor R1 and the second resistor R2 are connected in series in sequence, and the second resistor R2 is connected to the node of the non-polar capacitor C1 and the diode D1;
[0038] The resistor R0, the sine wave AC signal source V1 and the second capacitor C2 are connected in series, and the other end of the second capacitor C2 is conne...
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A circuit capable of accurately measuring AC source flame ion current comprises a signal sampling circuit, a sampling modulator circuit, an output waveshaping circuit and a DC level signal source, wherein the signal sampling circuit is connected with the sampling modulator circuit; the sampling modulator circuit is connected with the output waveshaping circuit; the DC level signal source is connected with a first operational amplifier (U1A) and a second operational amplifier (U2A); due to the adoption of the structure, data sampling of a combustion flame signal during AC detection is quantified, so that excellent data basis is provided for reliable monitoring on combustion conditions and combustion performance of products, and adoption of corresponding control countermeasures.
Description
Technical field [0001] The present invention is a circuit that can accurately detect and exchange the flame ion current. Background technique [0002] At present, in the current technology, in products such as gas water heaters, gas stoves, gas heating stoves, etc., flame combustion conditions are key factors for ensuring product combustion performance, efficiency, as well as core performance indicators such as flue gas emissions, and environmental protection, especially in this kind.For high -end technical fields such as compulsory combustion technology, pre -mix (including semi -pre -mixed) combustion technology, condensed combustion heat exchange technology, the precise detection of flame ion current is the most direct and effective basis for the monitoring of flame combustion conditions.Therefore, it is also the key to ensuring product combustion performance, efficiency, and core performance indicators such as smoke emissions and environmental protection. [0003] Among the g...
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IPC IPC(8): G01R19/00
Inventor 胡志恒刘筱明高中伟
Owner 佛山市赛扬电子科技有限公司