The invention belongs to the field of intelligent traffic, and discloses a synchronous timing signal generation device for a network connection signal lamp, which comprises a transformation half-wave rectification circuit, a voltage generation circuit, a falling edge grabbing circuit and a waveform shaping circuit, and the transformation half-wave rectification circuit, the voltage generation circuit, the falling edge grabbing circuit and the waveform shaping circuit are connected in sequence. The wave crest position can be accurately judged, and a falling edge signal is formed; if the alternating current passes through the wave crest position during power-on, a falling edge signal can be generated in the voltage falling process of the positive half wave of the alternating current, and the influence of small voltage amplitude is avoided; counting and timing signals given by each device are ensured to be completely synchronous; and at the peak position. The circuit is not influenced by power-on fluctuation, the mains supply can only be triggered once in the descending process, and even if voltage fluctuation exists, the mains supply can be filtered out.
本发明属于智能交通领域,公开了一种用于网联信号灯的同步计时信号发生装置,包括:变压半波整流电路、电压发生电路、下降沿抓取电路和波形整形电路,所述变压半波整流电路、电压发生电路、下降沿抓取电路和波形整形电路依次连接。本发明可准确判断波峰位置,并形成下降沿信号;如上电时已过波峰位置,在交流电正半波的电压下降过程中,亦可产生下降沿信号,且不受电压幅度小的影响;保证各设备给出的计数、计时信号完全同步;且在峰值位置。电路不受上电波动影响,市电在下降过程中仅能被触发一次,即使存在电压波动也会被过滤掉。
Synchronous timing signal generating device for network connection signal lamp
一种用于网联信号灯的同步计时信号发生装置
2022-04-08
Patent
Electronic Resource
Chinese
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