The present invention relates to a directional arm-type heartbeat measurement device, which is used to be worn on a user's arm. The device mainly includes a housing, an arm-type belt, a heartbeat measurement module, a directional antenna, And signal processing module. Among them, the arm strap is used to fix the housing to the user's arm； the signal processing module processes the heartbeat information measured by the heartbeat measurement module into a telecommunication signal and sends the telecommunication signal through the directional antenna. According to this, the present invention uses the human arm as the measurement object, because the arm swing is the least, it is easy to wear, and it is not easy to loosen, and it is not easy to produce dissociation due to vibration. In addition, the use of directional antennas to transmit low-frequency and low-power signals can not only reduce energy loss, but also avoid adverse effects on the human body due to high transmission power.本新型係有關於一種指向性臂式心跳量測裝置，其係用於配戴於一使用者之手臂，該裝置主要包括殼體、臂式束帶、心跳量測模組、指向性天線、以及信號處理模組。其中，臂式束帶用以將殼體固定於使用者之手臂；信號處理模組將心跳量測模組所量測到的心跳資訊處理成一電信訊號並透過指向性天線發送電信訊號。據此，本新型透過以人體手臂為量測對象，因手臂擺動幅度最少，穿戴容易，且不易鬆脫，又不易因震動而產生離訊。此外，以指向性天線來發送低頻低功率的訊號，除了可以減少能量的損耗外，也可避免因高發射功率對人體產生不良影響。
