G - Physics – 01 – R
Patent
G - Physics
01
R
324/70
G01R 11/32 (2006.01) G01R 11/16 (2006.01) G01R 21/133 (2006.01)
Patent
CA 1201483
ABSTRACT The electronic watt-hour meter (10) comprises an electro-optical watt-hour sensor (12) adapted to be coupled to a consumer's connection to a source of elec- tric power for sensing voltage supplied to, and the cur- rent drawn by, the consumer's electric load and for pro- ducing output signals indicative of a quantify of watt- hours of power utilized by the consumer. In the meter (10) a microprocessor (22) is coupled to the sensor (12) for receiving output signals therefrom and a memory (29) is coupled to the microprocessor (22) for receiving and storing data. A power supply (24) supplies D.C. power to the microprocessor (22) and includes a clock signal generator to supply a 60 Hz. clock signal to the micro- processor (22). Also a visual display (30) is coupled to the microprocessor (22) for providing a readout of the power consumed since the last reading of the solid state watt-hour meter. The electro-optical sensor (12) includes a yoke (l4) having a voltage core (62) and at least one current core (66 or 67), an induction disk (16) mounted for rotation in yoke (14), a voltage coil (61) on the voltage core (62) and a current loop (68 or 69) on the current core (66 or 67) for causing, when energized, rotation of the induction disk (16). At least one aper- ture (76) is provided in the disk (16). LED's (71 and 72), positioned on one side of the disk (16), are coupled to the microprocessor (22). Photosensors (81 and 82) are positioned on the other side of the disk (16) for receiv- ing light passing therethrough and for generating an out- put signal which is supplied to a direction sensing and revolution counting circuit (90) for sensing the direction of rotation of the disk (16) and for supplying such infor- mation to the microprocessor (22). A power supply coil (26) is mounted on the yoke (14) for supplying A.C. voltage to the power supply (24).
420704
Gilker Clyde
Hurley James R.
Mcgraw-Edison Company
Shapiro Cohen
LandOfFree
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