| 摘要 |
<p>The present invention relates to a belt tension measuring apparatus. The belt tension measuring apparatus comprises: a directional microphone connected to a housing through a nut type microphone connector; and a control unit formed inside the housing. The control unit receives, through the directional microphone, the frequency generated when a belt is flickered so as to measure the tension of the belt using the directional microphone, controls the level of the input value of a sound according to the frequency through the bias voltage circuit optimally calibrated in an internal circuit, and enables a signal component rather than a noise component to be captured only at the circuit input through the directional microphone.</p> |
