contact bounce的意思|示意

Contact bounce, or switch bounce, is a phenomenon in which a switch contact or relay contact will open and close quickly several times when operated, as opposed to staying open or closed until it is specifically released. It is a common problem that is encountered when wiring electrical and electronic devices, and can cause them to malfunction.

Contact bounce usually occurs when two surfaces with electrical contact, such as two metal plates, are pressed together quickly and forced apart quickly. This causes the electrical contacts to vibrate, causing them to make and break the electrical connection many times. The result is that when the switch or relay is operated, the electrical connection is made and broken many times, instead of just once.

This phenomenon can be dealt with in a few different ways. One way is to use a capacitor or resistor in the circuit to slow down the electrical connection, or to use a type of switch or relay specifically designed to reduce contact bounce. Another way is to use a special type of circuit called a Schmitt trigger, which is designed to filter out contact bounce.

Contact bounce can also be avoided by making sure that electrical contact surfaces are clean and free of dirt and debris before they are connected, and that they are pressed together slowly and pulled apart slowly. This will help to reduce the amount of vibration and bouncing, and thus reduce the chances of contact bounce occurring.