LiDAR (Light Detection And Ranging) is an indispensable sensor for precise long- and wide-range 3D sensing of the surrounding environment. The recent rapid deployment of autonomous driving (AD) has highly benefited from the advancement of LiDARs. At the same time, the safety-critical application strongly motivates its security research. Recent studies demonstrate that they can manipulate the LiDAR point cloud and fool object detection by shooting malicious lasers against LiDAR scanning. However, prior efforts focus on limited types of LiDARs and object detection models, and their threat models are not clearly validated in the real world. To fill the critical research gap, we plan to conduct the first large-scale measurement study on LiDAR spoofing attacks against a wide variety of LiDARs with major object detectors. To perform this measurement, we first significantly improved the LiDAR spoofing capability (30x more spoofing points than the prior attack) with more careful optics and functional electronics, which allows us to be the first to clearly demonstrate and quantify key attack capabilities assumed in prior works. In this poster, we present our preliminary results on VLP-16 and our research plan.

This article presents a fully integrated charge pump with optimized gate voltages for energy harvesting applications. In this article, design tradeoffs of gate voltages in low input voltage capacitive dc–dc converter designs are discussed and analyzed. The analysis shows that these tradeoffs can result in an optimum point where power losses can be minimized. Hence, gate voltage optimization is proposed to improve the power conversion efficiency. To prove the concept, five- and three-stage charge pumps with optimized gate voltages are implemented with the 180-nm CMOS technique. Down to 0.12-/0.13-V startup voltages are achieved by the proposed five-/three-stages design correspondingly. Comparing it with a similar three-stage linear charge pump in previous state-of-the-art research, a 20% peak power conversion efficiency improvement is achieved by the proposed design under the same 0.18-V input voltage.

This paper presents a gate voltage optimized fully integrated charge pump for thermoelectric energy harvesting applications. In this paper, the trade-off generated by rising the gate voltage of switching transistors are discussed. The proposed 5/3-stage design, which implemented with 180 nm CMOS technique, achieved a down to 0.12V/0.13V startup voltage correspondingly with the proposed technique. A 20% peak power conversion efficiency improvement is achieved when comparing with a similar 3-stage linear charge pump in previous state-of-the-art research.

This paper presents a fully integrated charge pump with gate voltage optimization for energy harvesting applications. In this paper, the benefits of powering a multistage charge pump with its own output are analyzed and the optimization of gate voltage are discussed. With optimized gate voltages, a 5-stage and a 3-stage charge pump are implemented with 180nm CMOS technique. Down to 0.12V/0.13V startup voltages are achieved by the proposed 5/3-stage design correspondingly. Comparing with a similar 3-stage linear charge pump in previous state-of-the-art research, a 20% peak power conversion efficiency improvement is achieved by the proposed design under the same 0.18 V input voltage.

This paper presents a coin-cell powered small size wireless sensor node with a sensor bridge biased by an energy-efficient DC-DC converter. To reduce the switching noise of the DC-DC converter, a Wheatstone bridge with differentially balanced in wide resistance range is used. Circuit parameters, such as bridge resistances and amplifier offset are automatically set to the optimal values in the startup sequence. Proposed sensor interface achieved power reduction by 57.3% and intermittent operation further reduces the power consumption by 78.6% from which uses LDO. The developed tiny wireless sensor node with a nanoscale gas sensor device successfully demonstrated 100ppm hydrogen gas detection.

In this paper, a noble gas sensing system using a large scale integrated resistive sensor array and its interface system is introduced. Accuracy improvement, compared to conventional techniques, was achieved using our proposed opamp output impedance calibration technique. This technique makes it possible to use a low power, weak drivability opamp in the interface circuit. This paper shows the calibration method which reduces the sneak path current error from 83.6% to 1.2% through MATLAB simulations. A prototype system with 1,024 gas sensors integrated in one chip, discrete ICs of opamp, ADCs, and an FPGA was developed, and the effectiveness of the system is demonstrated.