| 摘要 |
An adaptive switching circuit for switching electrical power to a load, such as turn indicator lamps in a motor vehicle. The switching circuit comprises load switching means (17, T3) for conducting electrical power to the load upon actuation and timing means (15, 23) for intermittently actuating the load switching means. The switching circuit includes measuring means (14, 23) for measuring a value of electrical current associated with the power and memory means (13, 35) for storing at least one value of electrical current. The switching circuit also includes comparator means (16, 23) for comparing the stored value of current with the measured value and means for indicating whenever the stored value of current differs from the measured value by a predetermined amount. The stored value of electrical current may be an averaged or normalized representation of the value of electrical current. The averaged or normalized representation of current may be calculated by reference to the voltage associated with the electrical power. |
