1.Requirement analysis: Clearly define the accuracy requirements of monitoring, applicable sports scenarios, size and shape limitations of the equipment, etc.
2.Selecting the appropriate sensor: Choose a heart rate sensor with high sensitivity, quick response and suitability for sports monitoring.
3.Microcontroller selection: Select the appropriate microcontroller according to the functional requirements and processing capabilities to process the sensor data.
4.Circuit design:
- Construct the sensor interface circuit to ensure stable data transmission.
- Design the power management circuit to guarantee stable power supply and low power consumption.
- Consider the signal conditioning circuit to perform amplification, filtering and other processing on the sensor signal.
5.Layout planning:
- Reasonably arrange the positions of elements such as sensors and microcontrollers, considering factors such as signal interference and heat dissipation.
- Plan the wiring direction to make the signal transmission path short and with less interference.
6.PCB wiring: Wire carefully to reduce signal crosstalk and electromagnetic interference.
7.Anti-interference measures: Add shielding layers, filter capacitors, etc. to enhance the anti-interference ability.
8.Prototype production and testing: Produce a PCB prototype and conduct functional tests and performance evaluations.
9.Optimization and improvement: Optimize according to the test results, such as adjusting circuit parameters and improving wiring.
10.Reliability verification: Conduct reliability tests under long-term operation and different environmental conditions.