2results about How to "Self-driving" patented technology

The present invention aims to provide a self-driven broadband photodetector and its fabrication method, belonging to the field of photodetector technology. In this detector, one side of a narrow-bandgap two-dimensional semiconductor is in contact with a metal, and the other side is in contact with a two-dimensional semi-metal, thereby constructing good asymmetric Schottky and Ohmic contacts on both sides of the narrow-bandgap two-dimensional semiconductor. This structure achieves a wide detection spectral range from visible light to infrared light and high photodetector performance without the need for external power supply, and the device exhibits a low dark current at zero bias, reaching 10-1. ‑13 A, which also has high responsiveness.

The present invention discloses a wireless sensor node powered by radio frequency energy and a wake-up and self-driving method thereof. PMIC performs voltage conversion on the radio frequency energy input, and then charges a super capacitor. After the charging voltage reaches the preset threshold of PMIC, the load switch connected to PMIC is turned on, and then the sensor, MCU and wireless communication module are powered. After the wireless communication module is connected to the host, it sends a connection indication to wake up the MCU, and the MCU collects sensor information and sends it to the host through the wireless communication module. The present invention realizes the storage of radio frequency energy through the cooperation of PMIC with threshold detection, low leakage current load switch and super capacitor; minimizes the discharge loss of radio frequency energy through the sleep wake-up mechanism; and realizes the self-driving of wireless sensor nodes powered by radio frequency energy through the fine management of radio frequency energy storage and release.