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The Dark Matter Particle Explorer (DAMPE) is a scientific satellite designed to search for the clue of dark matter particles for a mission period of at least 3 years. Two types of readout ASICs, named VA160 and VATA160, are adopted for the front-end electronics (FEE) to meet the design specification. Total lot screening of VA160 and VATA160 is utilized to assist in achieving levels of quality and...
A front-end unity-gain 1-bit flip-around DAC (FADAC) is exploited in a 12-bit opamp-sharing pipelined ADC, allowing a 1.8-Vpp full-swing input at a 1.1-V supply. The high input swing, coupled with a large feedback factor (≈1) of the FADAC, enables a low-voltage low-power design for a high resolution pipelined ADC. The prototype 12-bit ADC operating at 20-MS/s and 1.1-V supply achieves a 66.4 dB SNDR...
Three dimensional optic measurement system's accuracy is highly related with the field of inspection. Increasing of field inspection costs increasing camera / projector pixel area on the test surface. Small surface changes within one pixel area cannot be directly detected, which will lower the system accuracy. A pixel-to-pixel strategy is developed to solve this problem. Increasing field of inspection...
The objective of this paper is to propose a robust one shot structured light pattern for real time 3D shape inspection system. To reduce the influence of inspected part reflectance property and ambient light, the pattern is constructed by using monochromatic light. The corner of the chessboard is utilized as the primitive of the pattern since it can provide highly accurate position. Additionally,...
This paper describes an industrial robot joint offset calibration method called the virtual line-based single-point constraint approach. Previous methods such as using CMM, laser trackers or cameras are limited by the cost or the resolution. The proposed method relies mainly upon a laser pointer attached on the end-effector and single position-sensitive detector (PSD) arbitrarily located on the workcell...
The objective of this paper is to propose a wind- shield surface shape and optical parameters inspection system. In this paper, a white board works as a diffuse planar light source projecting structured light patterns because physical properties of specular surface do not allow us to directly apply the triangulation-based techniques used in ordinary diffuse surface inspection. The board is placed...
This paper introduces our recently developed high precision robot localization system employing position sensitive detectors (PSD). A lateral effect PSD is an ideal position sensitive device with a resolution of approx. 0.5 mum. Such a device can be used to enhance the precision capabilities of robot localization or robot calibration. The developed PSD guided localization system is comprised of a...
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