A novel design of a low-power intelligent sensor terminal for complex extreme operating environment

The traditional system design scheme is optimized by integrating actual application scenarios. For the terminal low-power application module, an appropriate terminal chip is selected. Based on the chip’s functionality and the application’s requirements, different logic modules are allocated to separate voltage domains. In the new configuration, the device operates for 24 hours with a current of 130 mA, resulting in a total power consumption of 3.12 Ah. However, in environments such as cable trenches, pipe wells, and tunnels, where there is no low-voltage power supply, the power consumption increases to 4-5 Ah, which does not meet the usage demands. Devices in the off-chip system are selected for their low-power consumption features, and when no active tasks are required, they enter a low-power state to minimize the total trigger flip rate, thereby reducing overall power consumption. Comprehensive checks and analyses are performed from the system level down to physically integrated wiring to identify potential improvements that further reduce power consumption and meet the design requirements. With the optimization, the system now operates for 24 hours with a current of 65 mA and consumes just 1.56 Ah. The final system is adapted to the complex environmental conditions of cable trenches, pipe wells, and cable tunnels.