Communication method and system for firefighting equipment based on two buses

Abstract

A communication method and system for fire-fighting equipment based on two buses, including a master device and a slave device. The master device and the slave device first try different baud rates for communication according to the agreed order, and then judge according to the return receipt fed back from the slave device Whether the current baud rate can communicate normally. Repeat this process to determine the best baud rate for communication between the master and slave devices, and finally communicate at this baud rate. Through the present invention, the flexibility and expansibility of the whole fire fighting system are greatly increased, the compatibility with the original fire fighting equipment in the system is higher when the fire fighting equipment is replaced or added, and the communication rate is optimized.

Description

technical field [0001] The invention relates to the field of fire-fighting equipment, in particular to communication technology between fire-fighting equipment. Background technique [0002] Existing fire-fighting equipment usually realizes communication between equipment through two buses. Compared with the four-wire system (the four-bus system includes two power supply lines and two communication lines), the two-bus system combines the power supply line and the signal line into one, and the signal and power supply share the same bus. Therefore, compared with the four-bus system, the fire-fighting equipment based on the two-bus system can save construction and cable costs, and bring great convenience to on-site construction and later maintenance. Therefore, the two-bus technology is widely used in fire protection, instrumentation, sensors, industrial control and other fields. [0003] Typical bus technologies include M-BUS, fire bus, etc. The fire bus system adopts the d...

AI Technical Summary

Problems solved by technology

The above-mentioned fire two-bus communication method obviously has the following shortcomings: the serial communication rate in the existing fire-fighting two-bus communication system cannot be adjusted, and the transmission rate required by the new equipment is higher than that of the old equipment. Therefore, due to the difference in transmission rate, new and old Normal communication between devices is not possible

Since the baud rate of the equipment in the existing system cannot be adjusted, the fire protection system can only use equipment with the same baud rate, so the scalability is poor and the maintenance cost is relatively high

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