The present invention relates to a physiological signal detection system, including a light emitting unit, an image capturing unit, an image processing unit, a sensing unit and a control unit. The present invention uses non-contact sensors, such as a cardiac impact tracing sensor and a low-power radar, to simultaneously detect physiological parameters of a subject, in combination with use of a visual distance detection system to detect the position and the movement of the subject, so as to effectively determine the position of the subject according to a shape change of an optical pattern cast by the subject, so that the physiological parameters of the subject can be accurately detected by means of a corresponding movement sensor of a movement module, t to address conventional issues that the existing sensor cannot support the various postures of the subject to obtain accurate data. The invention can accurately obtain the subject's various breathing or heartbeat and other physiological parameters.本發明有關一種生理訊號偵測系統，包括發光單元、影像擷取單元、影像處理單元、感測單元與控制單元；藉此，本發明藉由心衝擊描記法感測器與低功率雷達感測器等非接觸式感測器同時偵測受測者之生理參數，並結合可視距離檢測系統光學方法偵測受測者之位置與動作，有效依受測者所造成光學圖樣之形狀變化以確知其位置，以藉由對應之移動模組移動感測器而確實偵測受測者之生理參數，以改善既有之感測器無法支援受測者之各式姿勢而導致數據不正確之缺點，確實達到正確獲取受測者之各項呼吸或心跳等生理參數之主要優勢。
