triangular pulse

例句：

1. 1. The device generates a triangular pulse to detect thepresence of an object.
   该装置产生一个三角形脉冲来检测物体的存在。
2. 2. The triangularpulse was used to measure the distance betweentwo points.
   三角形脉冲被用来测量两点之间的距离。
3. 3.The triangular pulse was transmitted through thecable and detected by the receiver.
   三角形脉冲通过电缆传输，并由接收器检测到。