Program control constant current power supply for signal lamp program control compensation

Abstract

The invention discloses a program control constant current power supply for signal lamp program control compensation. The power supply comprises external AC220 V input, the external AC220 V input is connected to an energy storage circuit, a power supply control circuit, a power supply output voltage and current detection circuit in sequence, the other circuit of the AC220 V input is connected to an input detection circuit, a microcontroller accessed input detection circuit and the power supply output voltage and current detection circuit, results are fed back to a power supply feedback circuit and the power supply control circuit after calculation processing, then a microcontroller controls a load output driving circuit, and the functions of control output compensation and control constant current are achieved.

Description

technical field [0001] The invention relates to the field of traffic signal lamps, in particular to a program-controlled constant-current power supply for program-controlled compensation of signal lamps. Background technique [0002] At present, some of the known traffic lights use the pulse mode to trigger the countdown, that is, the scheduled countdown. Its characteristic is that the signal machine uses the flashing signal of 150-300ms to trigger the countdown system to work. During the flashing signal period, there is no signal output. This signal is used in traditional signal lights. The above performance is a 150-300ms extinguishment. The extinguishment of this signal light will bring wrong information to pedestrians and vehicles. When the light is off and flashing, pedestrians and vehicles will mistakenly think that it is the end of the red light and prepare to start in advance, which will bring safety hazards to the traffic. LEDs and different signal lights require d...

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