大多数牙科椅均采用普通开关控制其操作或用行程开关检测其位置.由于它依靠触点开闭控制电路通断,因而噪声较大,故障也多.随着传感技术的发展,无触点开关应用日益广泛,有的牙科椅上己采用了各种无触点开关控制其动作,下面我们以捷克生产的ERGOSTAR 90-S型牙科椅为例介绍霍尔开关器件在牙科中的应用. Most dental chairs use ordinary switches to control their operation or position switches to detect their position. Because it relies on the contact opening and closing control circuit on and off, so the noise is larger, more failures. With the development of sensing technology, non-contact Point switch applications are increasingly widespread, and some dental chairs have been using a variety of non-contact switch to control their movements, the following we have the Czech Republic produced ERGOSTAR 90-S-type dental chair as an example to introduce the Hall switch device in dental applications.