DUAL WAVEBAND TEMPERATURE DETECTOR

摘要

There are many industrial applications in which non-contact temperature sensing is useful for increasing production speed and quality, such as printing, laminating, extrusion, and metal forming. Disclosed is a non-contact temperature determining apparatus which uses two wide wavelength bands integrating sensors to determine the radiance ratio of a target and thereby determine a corresponding temperature of the target. Also disclosed is a non-contact temperature determining apparatus in which a beam splitter passes one wide wavelength band to a sensor and reflects another distinct wide wavelength band to another sensor from which temperature can be determined. A disclosed embodiment of the dual waveband temperature detector improves upon traditional and currently available ratio pyrometers by further reducing the cost of the system, making installation and use easier, and improving temperature detection for low temperature industrial applications.

主权项

1. A temperature detector for detecting the temperature of a target comprising:
a first sensor that detects radiation of a first wavelength band; a second sensor that detects radiation of a second wavelength band; and electronics that provide an output, based on detected signals from the first and second sensors, representing the temperature of a target, wherein one of the first and second wavelength bands is to a short wavelength side of a Planck function and the other of the first and second wavelength bands is to a long wavelength side of the Plank function.