CD4052系列芯片可取代笨重的继电器实现四路复用，比如超声波模块可以利用它多次利用，实现一个模块，可测量前后左右四个位置的测距。-CD4052 series chips can replace bulky relays four multiplexing, such as ultrasonic modules can use it several times to achieve a module, measure the distance around four positions.