Measuring device for a flame
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United States of America Patent
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-
Jan 13, 2004
Grant Date -
Jan 10, 2002
app pub date -
May 1, 2001
filing date -
May 12, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A flame measuring device, in particular for use in a regulating device for a burner, includes an ionization electrode which is arranged in a flame region of the burner. An ac voltage is applied to the ionization electrode whereby a dc voltage component is superimposed on an ionization current that flows through a resistor connected to the ionization electrode. The flame region influences the ac voltage and the dc voltage at a blocking capacitor unequally, and allows an ac voltage component to be separated from the dc voltage component by way of a first means. The separated ac voltage component can be compared to a separated-off dc voltage component by way of a second means in order to produce a pulse width-modulated signal.
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