Alarm system for channel congestion prevention

The utility model discloses an alarm system and especially discloses an alarm system for channel congestion prevention. The alarm system is composed of a detector set, a processor, and an alarm device. The detector set is installed in an access channel with people assembling and is electrically connected to the processor. The detector set transmits detected signals to the processor by a circuit system; and the processor is electrically connected to the alarm device. Therefore, the detector is installed according to the proper distance and height based on the proportion of the access channel. When people pass by the access channel, the detector set transmits a generated signal to the processor by the circuit system; the processor carries out preset database value comparison according to the signal from the detector set so as to analyze the people density and the congestion degree in the channel; if a corresponding critical value is reached, an alarm signal is sent out by the alarm device, so that people are warned not to enter the access channel. Therefore, anti-congestion alarm can be realized efficiently; the cost is low, the reliability is high, instant detection can be realized, and the safety is high; and the alarm system can be used for providing the safety guarantee for channels or places like schools, scenic spots, and other places with high flow rates.