G - Physics – 05 – D
Patent
G - Physics
05
D
341/32.1
G05D 23/19 (2006.01) G05B 15/00 (2006.01)
Patent
CA 1146239
PROGRAMMABLE ELECTRONIC REAL-TIME LOAD CONTROLLER PROVIDING FOR ADAPTATION OF LOAD CONTROL IN RESPONSE TO VARYING ENVIRONMENTAL CONDITIONS Abstract of the Disclosure A programmable electronic real-time load controller includes: a plurality of load control circuits, each being adapted to be interconnected with a load; a hardware clock; and a data processor for executing a set of program instructions stored in a program memory to effect real-time control of the load control circuits by comparing real-time information from the hardware clock with a time schedule stored in an event memory of the data processor. The time schedule is in the form of one or more control events and corresponding event times for each load, with each control event representing a period of time during each predetermined control interval subsequent to its corresponding event time that a load is to be on. In order to permit the controller to adapt the time schedule to varying environmental conditions, the controller is provided with additional components including a second program memory, at least one indoor temperature sensor, and an outdoor temperature sensor. Environmentally- adaptive modifications to real-time control include: an advance start modifica- tion, in which an event time associated with a load is advanced in relation to the deviation of outdoor temperature from a first reference temperature; a duty- cycle shift modification, in which the on-time of a load currently being duty- cycled in real-time is increased in relation to the deviation of indoor temperature from a second reference temperature; and, a night setback modification, in which a load is turned on whenever indoor temperature is outside predetermined high and low limits. Provision is made for effecting analog-to- digital conversion of the temperatures; for selecting any load for each of the various modifications; for grouping the loads at the facility into first and second zones, and by providing an indoor temperature sensor for each zone; for selecting the value of a zone deadband for the duty-cycle shift modification; and, for selectively displaying information related to real-time control, or, the variousindoor and outdoor temperatures and an advance time computed in the advance start modification.
363307
Butler Manufacturing Company
Smart & Biggar
LandOfFree
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