Highly effective signal circuit, control system and electrical equipment

Abstract

The invention provides a highly effective signal circuit, a control system and electrical equipment, and the highly effective signal circuit is connected to an external power supply through a contactswitch, and comprises a wet current configuration module, a pull-up module, a periodic control module, and a current-limiting voltage-dividing module. The wet current configuration module can periodically configure corresponding wet current for the contact switch under the control of the periodic module. The highly effective signal circuit is simple in structure, low in cost and easy to implement,and by adopting a periodic control strategy, under some conditions that the contact switch is closed, the periodic control module controls the wet current configured by the wet current configurationmodule not to form a loop, so that the reliability of the circuit is improved. Therefore, the problem that the electric quantity of the external power supply is greatly consumed when the contact switch is forgotten to be disconnected for a long time is solved, the electric quantity flowing through the contact switch is greatly reduced, and the energy-saving purpose is achieved.

Description

technical field [0001] The invention relates to the technical field of signal input, in particular to a high effective signal circuit, a control system and electrical equipment. Background technique [0002] At present, switches with metal contacts (referred to as contact switches) are used in the control systems of many electrical equipment (such as vehicles) to realize the on-off of related signals (such as a power signal), and these contact switches will be used for a long time. If it is not used, it may cause problems such as corrosion (such as oxidation and rust) or dirt (fine dust in the air, small particles, etc.), which will affect the impedance and service life of the contact switch. Therefore, in the control systems of these electrical equipment, a certain wet current (Wet Current, usually the minimum value of the current to keep the contact state in good condition) is usually set for these contact switches, which will cause metal oxidation and corrosion on the con...

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