Ultraviolet light flame detector
AssigneeDetector Electronics Corporation
InventorGary Follett
Life of this patent
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Abstract
A flame detector includes an ultraviolet (UV) sensor to detect UV radiation emitted by a flame; a testing apparatus to periodically test function of the flame detector. The testing apparatus includes a UV light emitting diode (UVLED) emitter to emit a test signal and a mirror to reflect the test signal emitted from the UVLED emitter to the UV sensor. A method of testing an ultraviolet (UV) flame detector includes transmitting a test signal from a UV light emitting diode (UVLED) emitter. The test signal is reflected toward a UV sensor of the flame detector, and the test signal received at the UV sensor is evaluated.
Claims17
A flame detector comprising:
- an ultraviolet (UV) sensor to detect UV radiation emitted by a flame;
- and
- a testing apparatus to periodically test function of the flame detector, including:
- a UV light emitting diode (UVLED) emitter to emit a test signal;
- and
- a mirror to reflect the test signal emitted from the UVLED emitter to the UV sensor.
A method of testing an ultraviolet (UV) flame detector comprising:
- transmitting a test signal from a UV light emitting diode (UVLED) emitter;
- reflecting the test signal toward a UV sensor of the flame detector;
- and
- evaluating the test signal received at the UV sensor.
A flame detector comprising:
- a housing;
- an ultraviolet (UV) sensor disposed in the housing to detect UV radiation emitted by a flame;
- and
- a testing apparatus to periodically test function of the flame detector, including:
- a UV light emitting diode (UVLED) emitter disposed in the housing to emit a test signal at a wavelength between 220 nM and 240 nM;
- a mirror to reflect the test signal emitted from the UVLED emitter to the UV sensor;
- and
- a UV window disposed at the housing interposed between the mirror and the UV sensor and between the UVLED emitter and the mirror, the test signal transmitted through the UV window to the mirror, reflected off the mirror, and back through the UV window to the UV sensor.
Dependencies are inferred from the claim text.