Testing and tuning electrically dimmable windows
First Claim
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1. A system comprising:
- a light source configured to emit a beam of known intensity at a dimmable element of an electrically dimmable window system;
a light intensity sensor configured to measure a measured light intensity of light passing through the dimmable element, and to output a first signal indicative of the measured light intensity;
an input configured to receive a second signal, wherein the second signal indicates the known intensity and a desired transmissivity of the dimmable element; and
a controller configured to;
calculate an actual transmissivity of the dimmable element from the known intensity of the light source and the measured light intensity;
compare the actual transmissivity to the desired transmissivity to generate a comparison; and
generate a third signal indicative of the comparison, wherein the controller is in communication with a control system of the electrically dimmable window system, and wherein the actual transmissivity of the dimmable element can be adjusted based on the intensity measured by the sensor.
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Abstract
A dimmable window testing system comprises a light source configured to emit a beam of known intensity through a dimmable element of an electrically dimmable window system. A light intensity sensor measures a light intensity of light emitted from the light source through the dimmable element.
31 Citations
9 Claims
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1. A system comprising:
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a light source configured to emit a beam of known intensity at a dimmable element of an electrically dimmable window system; a light intensity sensor configured to measure a measured light intensity of light passing through the dimmable element, and to output a first signal indicative of the measured light intensity; an input configured to receive a second signal, wherein the second signal indicates the known intensity and a desired transmissivity of the dimmable element; and a controller configured to; calculate an actual transmissivity of the dimmable element from the known intensity of the light source and the measured light intensity; compare the actual transmissivity to the desired transmissivity to generate a comparison; and generate a third signal indicative of the comparison, wherein the controller is in communication with a control system of the electrically dimmable window system, and wherein the actual transmissivity of the dimmable element can be adjusted based on the intensity measured by the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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setting a dimmable element of an electrically dimmable window system to a desired transmissivity; projecting a light beam of known intensity through the dimmable element; measuring a measured intensity of the light beam after the light beam passes through the dimmable element; calculating an actual transmissivity of the dimmable element based on the known intensity and the measured intensity; comparing the actual transmissivity and the desired transmissivity, wherein a comparison is generated; determining, based on the comparison, a difference between the actual transmissivity and the desired transmissivity; generating a signal indicative of the difference; transmitting the signal to a control system of the electrically dimmable window system; and adjusting a setting of the dimmable element so that the actual transmissivity substantially equals the desired transmissivity.
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Specification