| 摘要 |
A meter useful in measuring flow, such as electrical, gas, and water flow, where the meter includes a rotating wheel with markings that rotates in response to the flow sensed by the meter. The meter further includes an illumination source directing light to the surface of the rotating wheel, where a portion of the light is absorbed by the markings, and a portion of the light is reflected by the remaining surface of the rotating wheel. A detector array is included that reads the reflections and converts the readings into a signal. The signal can be analyzed in order to ascertain the rate and amount of flow sensed by the meter.
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