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This paper reports on a Q VGA vision sensor embedding 160 column-level digital processors executing real-time tunable scene background subtraction for robust event detection. The single-ramp column-parallel ADCs are used to estimate the pixel variations and detecting anomalous behaviors against two reference images stored in on-chip. The sensor generates a 160×120 pixel bitmap associated to potential...
In surveillance and monitoring applications, motion detection using commercial cameras with off-line high-level algorithm processing is not efficient. They have to force the high-level processor continuously analyze the acquired high-resolution images. This causes a large waste of power, since there are no events in most of the cases. Embedding low-level image processing on-chip will make the system...
A wireless system-on-chip with integrated antenna, power harvesting and biosensors is presented that is small enough, 200µm × 200µm × 100µm, to allow painless injection. Small device size is enabled by: a 13µm × 20µm 1nA current reference; optical clock recovery; low voltage inverting dc-dc to enable use of higher quantum efficiency diodes; on-chip resonant 2.4GHz antenna; and array scanning reader...
Rotary-linear switched reluctance motors (RLSRMs) are usually implemented in industry applications, such as boring mill, drill press and carving machines, etc [1].
In-wheel switched reluctance motors (SRMs) have been applied to electric vehicles (EVs) for direct drive to eliminate the transmission loss, due to its feature of low cost, fault tolerance, wide speed range, simple and robust structure [1–2].
The switched reluctance motor (SRM) has recently received much attention because of its preferred features in simple and rugged configuration and elimination of permanent magnet (PM).
In this paper, a direct-drive spherical motor to produce two-degree of freedom rotations has been proposed. The structure and prototype of the motor are given and the basic principles are described, including the operation principle and mathematic theories, etc. Importantly, the two air gaps between the mover and the rotor, the mover and the stator that mainly determine the performance of the motor...
In this paper, the main conductive and radiative electromagnetic sources are introduced especially for low frequency electromagnetic sources. Systematic and equipment view of electromagnetic field in the normal operation are simulated and analyzed by Maxwell and HFSS based on FEM. This paper provides an overview of the low frequency conductive and radiative EMI and EMC for the high speed railway.
Current passing through conductor in free space of air generates magnetic field which could interfere with the other apparatus nearby or even interrupt it. Inversely, the electromagnetic sources could also be affected by reaction filed or field generated from else. Therefore, the equipment needs to be designed to both blocking and tolerating the electromagnetic radiation. The electromagnetic interference...
The paper presents the investigation of the electromagnetic interference for the traction system in a high speed railway (HSR). Tt is important to study the characteristic of the transformer, converter and power cable for HSR. Traction transformer as the one of the first equipment on board traction system for connection to pantograph, and plays a key role in the electromagnetic investigation. In this...
One key application for the manufacturing of MLB and HDI printed circuit boards are pretreatment systems aimed at providing the optimum adhesion of organic coatings such as Photoimagable Resists (such as Dry Films [DF] and Liquid Photo Imageable Resists [LPIR]) or Solder Mask's (SM). The most common way for this optimum adhesion to be achieved is to use an etching solution to roughen the copper surface...
An adaptive high-precision position control algorithm with online system identification is implemented onto the switched reluctance, two-finger gripper with coupled magnetic paths. Theoretical investigation proves that the magnetic paths from the two fingers are highly coupled. Without the introduction of any decoupling scheme, the position control performance under the proportional integral differential...
Terahertz spectroscopy has multivariable and produces large volumes of data. Principal component analysis (PCA) is a statistics analysis method of dimensionality reduction of multivariate. We studied the feasibility of PCA method for material classification in terahertz region. The results show that PCA is able to differentiate materials obviously if initial variables are chosen properly.
Linear permanent magnet motors (LPMM) and linear switched reluctance motors (LSRMs) are suitable for translational, direct-drive position control applications. Several linear permanent magnet motors (LPMMs) have been investigated [1-3]. However, there often exists unavoidable cogging forces from LPMMs that require additional control algorithms to compensate for high-precision, position control applications...
Linear motors, as direct-drive actuators, have been quickly developed within recent years and now they are widely applied in the industrial production area, such as automatic soldering, carving and embroidery machines, etc [1]. At present, linear permanent magnetic motors (LPMMs) are the mainstream of market due to their considerable force output performance with high power density and efficiency...
The design of an operator-training computer simulator for chemical processes is very important in the process control and simulation area. In this paper, an operator-training simulator is developed for a small-scale fine chemical production process using an IPC (industrial personal computer and intelligent process controller) simulation mode and a typical SCADA (supervisory control and data acquisition)...
In this paper, a fully automated, low-cost, real-time illuminance measurement system for LED long term reliability tests is proposed. The system has only one photodetector to measure the illuminance of all samples inside the test chamber during the reliability test. With a proprietary algorithm, a single photodetector can measure the illuminance of all samples in the chamber by sequential scanning...
In this paper, a fully automated, low-cost, real-time illuminance measurement system for LED long term reliability tests is proposed. The system has only one photodetector to measure the illuminance of all samples inside the test chamber during the reliability test. With a proprietary algorithm, a single photodetector can measure the illuminance of all samples in the chamber by sequential scanning...
Silicone is one of the typical encapsulation materials used in light-emitting diode (LED) packaging. In general, silicone has the merits of good optical properties, high thermal stability, and good electrical insulation. However, it has relatively low mechanical rigidity and poor adhesion strength. Therefore, delamination between the silicone encapsulant and the leadframe cup (or substrate) is one...
This paper presents an experimental study on the adhesion strength between the silicone encapsulant and the bottom of the leadframe cup of a 3528 SMD LED. In this study, a new test method was proposed using silicone to mount a piece of dummy silicon chip to the bottom of the leadframe cup. Afterwards, a bond tester was employed to apply the loading on the edge of the dummy silicon chip to shear the...
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