Automobile lamplight automatic control device with protection function

Abstract

The invention relates to an automobile lamplight automatic control device with a protection function, and belongs to the technical field of automobile electrical appliances. A light sensation collecting circuit composed of an H-shaped bridge circuit formed by a photosensitive resistor and a fixed resistor is adopted to be connected with a voltage comparison circuit composed of two-level operational amplification circuits to form a control unit. A coupling loop composed of a forward-direction crystal diode and a resistor is arranged between the two-level operational amplification circuits, andan energy releasing loop composed of a capacitor and a resistor are in parallel connection with the position between the connecting position of the forward-direction crystal diode and the resistor andthe ground; and a deep negative feedback direct current amplification output circuit is adopted to form a driving control and protection circuit, wherein the deep negative feedback direct current amplification output circuit is formed by sequential connecting of an NPN-type transistor and a PNP-type transistor, and the output end of the driving control and protection circuit is connected into a direct current voltage-regulator diode in a bridging mode. The automobile lamplight automatic control device with the protection function has the advantages that the structure is simple, performance isreliable, a breakdown disappears, automatic restoring can be achieved, and maintenance is not required, the cost is low, application and popularizing are easy, applicability is high, and the automobile lamplight automatic control device can be combined with lamplight systems of various structures.

Description

technical field [0001] The invention discloses an automobile light automatic control device with a protection function, which belongs to the technical field of automobile electric appliances. Background technique [0002] The technology and industrialization of the automatic lighting control system for automobiles have matured. Its technology mainly uses microcomputer automatic detection and analysis for intelligent control. The photoelectric sensor detects the ambient light and the state of the car for analysis and judgment, and automatically turns on according to the strength of the ambient light. Turn off the display lights, instrument lights, low beams or high beams to realize the best intelligent conversion of photoelectric induction. It solves the problem of changing ambient light in the driving process of the car, the function of changing freely in the complex light environment and the self-adaptive ability in various states. Domestic automobiles currently have produ...

AI Technical Summary

Problems solved by technology

[0004] The main problem of the above-mentioned automatic light control device for automobiles is that when the drive circuit connected to the control device fails, such as a common short-circuit fault, it will affect its normal work, and it cannot be automatically protected and restored; another problem is that it is vulnerable to instantaneous light interference

For example, the illumination of the strong light on the opposite side and the change of the tunnel's own light will affect the stability of its work.

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