Park automatic switch circuit with delaying function

Abstract

A park automatic switch circuit with a delaying function mainly comprises a power supply, a capacitance voltage drop circuit, an antenna ring, a microwave sensing controller, a light control circuit, a delaying timer and an LED fluorescent lamp. Through the capacitance voltage drop circuit, the power supply is converted into 11 V direct currents to be provided for a microwave sensor, the microwave sensing controller uses the minitype antenna ring for microwave detecting, the antenna ring is used as a sending antenna and receives echoes reflected by moving of a human body or a vehicle, the light control circuit is connected with the microwave sensing controller and mainly comprises a light dependent resistor, the delaying timer is connected with the microwave sensing controller, a timing function is achieved by charging a fixed capacitor, and turning on and off of the LED fluorescent lamp are controlled by the microwave sensing controller by controlling double-direction controllable silicon. Based on automatic control of a microwave technology, under the situation that light intensity is lower than a certain range, when a person enters a switch sensing range, the LED fluorescent lamp in a park can be turned on automatically, and after the person leaves, the LED fluorescent lamp is automatically turned off by switch delaying.

Description

Technical field

[0001] The invention relates to a lighting device with an induction switch, in particular to an automatic switch circuit of a parking lot with a delay. Background technique

[0002] Since the end of the 1860s, the first visible-infrared LED was invented using phosphide in gallium arsenide. With breakthroughs in semiconductor and LED packaging technologies, the power levels of single-chip red, green, blue, and white LEDs And the brightness continues to improve. With the obvious improvement of LED luminous efficiency, life span and light color, it has great potential in the fields of display, backlight, decoration and lighting. Although the application level of LED continues to expand, its life span and light efficiency are higher than traditional lighting. However, the cost is relatively high. The cost of LED light sources is as high as 50% to 90% of the total cost. There is still room for improvement in lighting source technology, and the heat dissipation and li...

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