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<p></p> <p><b>New page</b></p><div>== 蜂鸣片的原理 ==<br /> 蜂鸣片是利用压电效应原理工作的，当对其施加交变电压时它会产生机械振动；&lt;br&gt;<br /> 反之，对其施加机械作用力时它也会产生电压信号。&lt;br&gt;<br /> 因此，可以将压电陶瓷蜂鸣片变通作为振动传感器使用。&lt;br&gt;<br /> 压电陶瓷蜂鸣片受到机械作用力时产生的电压信号很微弱，作振动传感器使用一般应连接电压放大器。&lt;br&gt;<br /> <br /> The buzzer works based on the principle of piezoelectric effect. When an alternating voltage is applied to it, it will produce mechanical vibration; &lt;br&gt;<br /> Conversely, it generates a voltage signal when a mechanical force is applied to it. &lt;br&gt;<br /> Therefore, the piezoelectric ceramic buzzer can be used as a vibration sensor. &lt;br&gt;<br /> The voltage signal generated by the piezoelectric ceramic buzzer when it is mechanically applied is very weak. Generally, it should be connected to a voltage amplifier as a vibration sensor. &lt;br&gt;<br /> <br /> == Use as input by vibration ==<br /> * https://www.youtube.com/watch?v=1SNC3ib10_4<br /> === Demo Code ===<br /> &lt;source lang=&quot;arduino&quot;&gt;<br /> void setup()<br /> {<br /> Serial.begin(9600); //Open the serial to set the baud rate for 9600bps<br /> }<br /> void loop()<br /> {<br /> int val;<br /> val=analogRead(0); //Connect the analog piezoelectric ceramic vibration sensor to analog interface 0<br /> Serial.print(&quot;Vibration is &quot;);<br /> Serial.println(val,DEC);//Print the analog value read via serial port<br /> delay(100);<br /> }<br /> &lt;/source&gt;<br /> <br /> == Use as a buzzer ==<br /> * https://playground.arduino.cc/Code/ToneAC/<br /> <br /> [[category: Buzzer]]<br /> <br /> [[category: Sensor]]</div>

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