| 摘要 |
A sprinkler system controller comprising temperature sensor means for monitoring air temperature and transmitting an affirmative temperature indication signal when a given preset temperature is exceeded; light sensor means for monitoring light intensity and transmitting an affirmative illumination indication signal when a given preset intensity is not exceeded; moisture probe means for monitoring ground moisture and transmitting an affirmative moisture indication signal when a given preset moisture level is not exceeded; conjunctive means coupled to the temperature sensor means, light sensor means, and moisture probe means for transmitting an affirmative timer activation signal upon receipt of an affirmative temperature indication signal, an affirmative illumination indication signal, and an affirmative moisture indication signal; timer means coupled to the conjunctive means for receiving an affirmative timer activation signal and transmitting an affirmative sprinkler valve activation signal for a preset period of time upon its receipt; and water valve actuation means coupled to the timer means and adapted to be coupled to at least one water valve of a sprinkler line for opening the water valve when an affirmative sprinkler valve activation signal is received.
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