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EAMA (EAST Articulated Maintenance Arm) is an articulated serial robot arm working in experimental advanced superconductor tokamak for the inspection and maintenance. This paper implements algorithms to calibrate the synchronize deflection and estimate its signal for the robot control. The retrieval has two distinct tasks, a shaft rotation direction signal processing and a discrete data classification,...
EAST Articulated Maintenance Arm is an articulated serial robot arm for inspection and maintenance in an experimental advanced superconductor tokamak. This paper implements soft computing algorithm for software calibration and compensation of pitch joint movement. An adaptive neurofuzzy inference system is applied to forecast the disclosed hysteresis loop compensation data. Joint position accuracy...
EAMA (EAST Articulated Maintenance Arm) is an articulated serial robot arm working in experimental advanced superconductor tokamak for inspection and maintenance. This paper implements an algorithm to calibrate the segment position compensation error and estimateits signal. First, the error model is curve fitted, which has unneglectable nonlinearities. Second, extended Kalman filter is adapted toaccurate...
The existing SPECT system for nuclear cardiac imaging suffered from low sensitivity or high cost. In this study we implemented a novel design of the stationary dedicated cardiac SPECT combined with multi-pinhole collimators based on the clinical dual-head scanner with low cost. Previous simulation study has demonstrated the feasibility of the design. Accurate geometry calibration was implemented for...
There are two methods commonly used for the performance test of voltage divider system. Step response method is used to measure the transient response of system, and frequency response method is used to measure the amplitude-frequency characteristics and phase-frequency characteristics. This paper discusses the equivalent conversion relationship of the characteristic parameters of time-domain and...
Given the explosive growth of cameras and LCDs in todays society, cameras get easy access to nearby LCDs and could be utilized for communication access based on visible light communication (V LC). However, there is still no prototype to implement two-way communications. Main challenge lies in the reflection noise since two screens of LCD and/or smartphone are in face-to-face position for two-way communications...
Accurate heading information is crucial for many mobile services such as navigation, autonomous vehicles, and robot applications. The standard way to obtain heading information is by using a tri-axis magnetometer, which can measure the signal intensity of the magnetic field in three orthogonal directions. However, a magnetometer is known to be highly susceptible to environmental interferences that...
The resistive voltage dividers are commonly used in many high voltage measurements. Their performance affects the measurement accuracy. Different calibration methods are discussed in this paper. The corresponding relations between the time-domain parameters calibrated by step response and frequency-domain parameters calibrated by network analyzers are obtained by mathematic derivations. These relations...
The paper introduces a calibration system on wideband power. The system is based on the synchronous sampling technology and non-integer-period interpolation compensation algorithm. Its frequency ranges from 10Hz to 100kHz, and the optimum measurement uncertainty is 25µW/VA.
In order to develop animal SPECT imaging technology on clinical SPECT scanners, we propose a highly flexible multi-pinhole collimator design scheme. The proposed design allows individual adjustment of important system parameters, so that the collimator device is adaptable to various SPECT systems, and one can also optimize different specific aspects of system performance (e.g. improving spatial resolution,...
In order to develop animal SPECT imaging technology with low cost, we propose a dedicated multi-pinhole collimator design scheme on a clinical SPECT scanner to achieve high resolution. Based on the proposed design one can also optimize current system design for different application purposes. This work is focused on achieving half-mm SPECT imaging resolution on a single-head clinical SPECT scanner...
In this paper, we present a technique for the construction of a camera sensor model for visual SLAM. The proposed method is an extension of the general camera calibration procedure and requires the camera to observe a planar checkerboard pattern shown at different orientations. By iteratively placing the pattern at different distances from the camera, we can find a relationship between the measurement...
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