关键词: 射频信号, 电梯, 召唤通信系统, 协调器, 厅层终端节点

Abstract: Regarding the problems such as the complicated arrangement of wires and inconvenience of commissioning and maintenance of the traditional hall call communication system of the elevator, a wireless radio frequency hall call communication system is designed based on a Si4460 chip. With M0516 as the main control chip, in combination with a Si4460-centered RF module and accompanied by a 433 MHz wireless communications network, the system can allow the wireless transmission of information between the hall terminal node and the master controller of the elevator. In the system, the terminal and coordinator at the hall realize the wireless transmit-receiving of data based on a frequency of 433 MHz, and the coordinator node and the master controller of the elevator achieve the communication through a RS485 interface. This article introduces the system from four aspects, which are the overall design scheme, hardware design, software design and performance test. The test results show that the system has realized the basic hall call functions and can achieve a good performance for the signal transmission of the elevator in different running conditions, and is not influenced by the electromagnetic interference environment in the hoistway of the elevator.

Key words: radio frequency, elevator, hall-call communication system, coordinator, the hall terminal node