一种模拟多个用户同时呼叫的消防电话测试系统

Abstract

本实用新型涉及模拟多个用户同时呼叫的消防电话测试系统，包括MCU单元、多个分机、多个双向自保持电磁铁、继电器电路和移位寄存器电路；MCU单元通过移位寄存器电路连接多个继电器电路，继电器电路一一对应连接并控制双向自保持电磁铁运行；MCU单元的一输入输出引脚连接上拉按键，根据上拉按键控制次数设置polarity_ctrl端子、power_ctrl端子的时序控制逻辑；MCU单元的一输入输出引脚连接下拉按键，根据下拉按键按动次数动态设置通话保持时间，本申请可实现一个人一次性模拟多个分机同时呼叫总机和同时挂机，能够有效的提高操作便捷性，提升工作效率，并节省成本。

Claims

1. A fire telephone test system simulating simultaneous calls by a plurality of users, characterized in that Includes an MCU unit, multiple extensions, multiple bidirectional self-holding electromagnets for controlling the dialing of extensions in a one-to-one correspondence, relay circuits, and shift register circuits; The MCU unit is connected to multiple relay circuits through a shift register circuit, and the relay circuits are connected to and control the bidirectional self-holding electromagnets one by one. One input / output pin of the MCU unit is connected to a pull-up button, and the timing control logic of the polarity_ctrl terminal and the power_ctrl terminal is set according to the number of times the pull-up button is controlled. One input / output pin of the MCU unit is connected to a pull-down button, and the call hold time is dynamically set according to the number of times the pull-down button is pressed.

2. The fire phone test system simulating multiple users calling simultaneously according to claim 1, wherein, The shift register circuit includes a first shift register chip and a second shift register chip; The first shift register chip has multiple output control pins connected to a polarity_ctrl terminal, the MR pin connected to an input / output pin of the MCU unit, the OE pin connected to an input / output pin of the MCU unit, the SH_CP pin connected to the XTAL_32K_P pin of the MCU unit, and the ST_CP pin connected to the XTAL_32K_N pin of the MCU unit. The second shift register chip has multiple output control pins connected to a power_ctrl terminal, the MR pin connected to an input / output pin of the MCU unit, the OE pin connected to an input / output pin of the MCU unit, the SH_CP pin connected to the XTAL_32K_P pin of the MCU unit, and the ST_CP pin connected to the XTAL_32K_N pin of the MCU unit.

3. The fire phone test system simulating multiple users calling simultaneously according to claim 2, wherein, The relay circuit includes a polarity_ctrl terminal, a power_ctrl terminal, a relay, a PMOS transistor, a first transistor, a second transistor, a first diode, a second diode, a Zener diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, and a second capacitor. Pin 3 of the relay is connected to a fuse, and the other end of the fuse is connected to a power terminal that provides 12V_OUT+ power to the bidirectional self-holding electromagnet; pin 6 of the relay is connected to a power terminal that provides 12V_OUT- power to the bidirectional self-holding electromagnet; pin 1 of the relay is connected to a 24V power supply and the negative terminal of the first diode; pin 8 of the relay is connected to the positive terminal of the first diode and the collector (C) terminal of the first transistor; the emitter (E) terminal of the first transistor is connected to digital ground; the base (B) terminal of the first transistor is connected to a first capacitor, a first resistor, and a second resistor; the other end of the first capacitor and the other end of the first resistor are both connected to digital ground; the other end of the second resistor is connected to the negative terminal of the second diode; and the positive terminal of the second diode is connected to the power_ctrl terminal. Pins 2 and 5 of the relay are both connected to digital ground. Pins 4 and 7 of the relay are both connected to the drain (D) of the PMOS transistor. The source (S) of the PMOS transistor is connected to the third resistor, the cathode of the Zener diode, and the 12V_OUT port. The gate (G) of the PMOS transistor is connected to the other end of the third resistor, the anode of the Zener diode, and the fourth resistor. The other end of the fourth resistor is connected to the collector (C) of the second transistor. The emitter (E) of the second transistor is connected to digital ground. The base (B) of the second transistor is connected to the second capacitor, the fifth resistor, and the sixth resistor. The other ends of the second capacitor and the fifth resistor are both connected to digital ground. The other end of the sixth resistor is connected to the polarity_ctrl terminal.

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