目前中醫在施行針灸針療法時，只憑藉臨床經驗來評估針灸針刺入人體穴位之深度。由於各穴位之針刺深度標準並不相同，故若針灸針進針之深度不足，則會降低針感而影響其治療效果。若針灸針進針之深度過深，尤其靠近重要器官之部位（頭部、胸部等），則可能會危及生命安全。為了掌控針灸針進針深度，本研究所設計之針灸針深度計乃使用光遮斷器感測元件偵測所掃過之平行光柵數，並結合深度計機構之設計來量測其針灸針進針之深度。針灸針深度計以單晶片微電腦作為系統之控制核心，透過單晶片強大功能及軟體程式之控制以LCM顯示器即時顯示進針之深度，並當進針之深度超過各穴道之針刺深度標準時，則發出警戒訊號告知中醫師必須停止進針。如此，可減少針灸意外事故之發生，確保病人生命安全。

　The Chinese medicine doctors usually only rely on the clinical experience to assess the depth of the acupuncture when doing the treatment. If the depth of the acupuncture is insufficient, then the efficiency of treatment will be educed. However, if the depth of the acupuncture is too deep, especially the position that close to the important organs, it may endanger the patient’s life. In order to control the depth of the acupuncture, this research makes use of the photo interrupter to detect parallel grating swept and combine the depth gauge organization to measure the acupuncture profundity. The acupuncture needle depth detector uses a single-chip microcontroller as the systematic control unit. It shows the depth of the acupuncture on a LCM displayer, and sends out the alarm signal when the depth of the acupuncture exceeds the acupuncture profundity safety of every cave. Thus, we can reduce the occurrence of the acupuncture contingency and guarantee the patient’s security.

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