可穿戴运动心率监测设备的低能耗电源设计

Design of low-energy consumption power supply for wearable exercise heart rate monitoring device

可穿戴运动心率监测设备对电源的要求较高,当前电源设计过程中,存在电源电路设计复杂、电压输出不稳定、能耗高的弊端,不能满足可穿戴运动心率监测设备对电源的要求。为此,设计了一种新的可穿戴运动心率监测设备低能耗电源,给出所设计低能耗电源芯片内部结构。介绍了欠压锁存模块的设计过程,通过欠压锁存模块保证数据采集的稳定性。为了保护电源芯片的安全性,设计了VCC过压保护电路。通过低压差线性稳压器给可穿戴运动心率监测设备的电源提供电力和部分偏置电压。为了符合可穿戴运动心率监测设备电源的低能耗要求,设计了能量回馈装置。依据硬件需要实现的功能,对软件程序进行编写,通过PID算法对可穿戴运动心率检测设备的电源进行低能耗控制。实验结果表明,所设计电源能耗低。

The wearable exercise heart rate monitoring device has high demand for power supply. In the current power sup- ply design process, the power circuit design is complex, the output voltage is not stable, and the energy consumption is high, which cannot meet power supply requirements of wearable exercise heart rate monitoring device. Therefore, a new low-energy power supply for the wearable exercise heart rate monitoring device was designed. In this paper, the internal structure of the low- energy power supply chip is given and the design process of the undervoltage latch module is introduced, which is used to guarantee data acquisition stability. In order to protect the safety of power supply chip, VCC overvoltage protection circuit was designed. Low dropout linear regulators are used to provide power and partial bias voltage for the wearable exercise heart rate monitoring device. In order to meet the low-energy power supply requirement of wearable exercise heart rate monitoring device, an energy consumption feedback unit was designed. Based on the function to be implemented by hardware, software program was compiled. The energy consumption of power supply of wearable exercise heart rate monitoring device can be kept low by means of the PID algorithm. The experimental results show that the. energy consumption of the designed power supply is low.