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本文介绍一种病床呼叫装置。它不仅可以显示病床呼叫号,而且还可以和该病人通话,其最大特点是采用了总线方式,即所有的呼叫与对讲信号均用一根信号线来传递,使得安装、维护方便,使用灵活。电路原理该装置的原理电路如图1所示。各发射与接收单元可分时或单独占用信号总线,因此,即可作呼叫显示装置,也可作多路对讲机使用。该装置主要由四部分组成:床位呼叫开关电路、床位呼叫信号显示电
This article describes a bed call device. It not only can display the bed call number, but also can talk to the patient. Its most prominent feature is the use of the bus mode, that is, all the calls and intercom signals are transmitted by a signal line, which makes installation, maintenance easy and flexible. . Circuit Principle The principle of the device circuit shown in Figure 1. Each transmitting and receiving unit can occupy time-sharing or signal bus separately, therefore, it can be used as call display device and multi-way intercom. The device is mainly composed of four parts: bed call switch circuit, bed call signal display