The design of PCB sensors requires careful attention to multiple factors to ensure reliable operation of the PCB under different application conditions. One of the environmental conditions is significant changes in temperature, humidity, and various chemical substances.
For example, sensor PCBs used in outdoor environments must be able to resist moisture and significant temperature changes. In contrast, sensor PCBs used in industrial equipment may be affected by vibration and mechanical stress.
Application specificity is crucial for defining design; For example, medical device PCBs must comply with many safety and accuracy regulatory standards, while consumer electronics products focus on compactness and cost-effectiveness.
Material selection is an essential part of the reliability and performance of sensor PCBs. Common materials include:
FR4： This is a universal type of composite material that typically has good electrical insulation and heat resistance properties.
Continuity Management 1: Compared to cheaper FR4, it has excellent mechanical properties and heat resistance, making it suitable for cost sensitive applications.
High frequency materials: Rogers or Teflon are high-frequency materials used for high-speed signal transmission.
These layout considerations can enhance the effectiveness of sensors and the integrity of signals. The wiring of the filter circuit should make the end-to-end cable length as short and direct as possible to prevent a decrease in signal strength over long distances.
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