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Field Programmable Gate Arrays have become popular platform for digital signal processing, however, the conventional method, which is essentially writing a source code in a hardware description language to design a product on a FPGA, is time consuming and complicated. This restricts the implementation of complex signal processing algorithm on FPGA. In this paper, two fast design methods of algorithm...
To effectively resolve the automatic recognition problem of analog measuring instruments, a reading recognition method based on improved Hough transformation is proposed. Firstly, the paper presents the image preprocessing operation. In order to make the image filtering better, an improved adaptive median filter method is adopted. Secondly, we explains in detail the recognition principle for the pointer...
The measuring concentration of Gas/Solid two phases flow is a difficult question in industrial process. The paper introduced an experimental research method and a system for measuring concentration of gas/solid two phases flow based on electrical capacitance tomography. The ECT system was 8 internal electrodes and an ac-based low capacitance measuring circuit. Two flow patterns, i.e. full and half...
S-parameters have been used in analyzing linear networks for more than half a century. Despite the great success of S-parameters, they are severely limited. In fact in real world, all systems are nonlinear. It's a hard work to characterizing the nonlinear network and thus it becomes a hot issue today. This article introduces two methods of nonlinear modeling, X-parameters and scattering functions...
In order to monitoring and control street lighting, the lighting pole controller was designed and implemented based on wireless sensor network. The controllers were installed at each lighting pole. The hardware of controller integrates a AVR microcontroller, a radio modem, double lamp control units and current detecting units. The lamp control units control primary and secondary lamp on or off according...
CCD spectrometer has commonly used to measure light color, but the survey in object color is not making much progress. This paper introduces an objects color measurement system composed by CCD spectrometer with illumination and observation in the condition of d/0. The system adopts light source to incidence the integrating sphere, after diffuse fully, the light illuminate the object. The object is...
To realize the real-time mosaic of image sequences in large scale mechanical parts with linear texture, this paper proposes a novel algorithm of image mosaic based on linear texture matching (LTM). The traditional algorithm of image mosaic consumes so much time that it can not be used on production lines. The proposed algorithm not only greatly reduces computing time but also enhances anti-disturbance...
Harris corner detection is a widely used corner detection algorithm, however deficiencies still exist: the detected corners are clustered and anti-interference ability is poor. In this paper, a method based on image compression and block processing is proposed to solve these deficiencies. It reduces the clustering phenomenon, increases the detection accuracy, and improves processing speed greatly...
With influence of imaging machine-mad, instrument and human breath, two-dimensional(2D) ultrasonic medical image is worse. A proper speckle signal is formed at imaging process, make it difficulties to distinguish between normal tissue and pathological tissue of human body, cause clinical diagnosis and medical study inconvenience, In this paper, an new filter method of the medical ultrasonic imaging...
The determination of hardness in water is a useful parameter to control the quality of water for industrial and households' uses. The present work proposes a digital image-based (DIB) titration as an alternative to the conventional EDTA titration. Experimental results obtained by this new methodology shows that the linear range of hardness detection ranks from 0 to 140 mmol/L. This method gave a reproducibility...
Computerized embroidery needs outline capturing of color images and stitch filling. Embroidery machines can make stitch filling according to color blocks in different areas. Considering the character of stitching of embroidery machines and referring to color image morphology, this thesis puts forward multi-scale graphic outline capturing algorithm based on color embroidery pattern of HIS space. And...
Electromagnetic field, which is generated by ESD spark and thin wire with ESD current injection, can cause interference to electronic equipments. In this paper, measurement systems for this electromagnetic field and coupling field of ESD with electronic equipments are established. The radiation field generated by the two kinds of ESD and coupling field in the cavity under the circumstances of different...
The cost effectiveness of fault detection and isolation techniques used in complex systems is paid more attention in nowadays. Well design for testability (DFT) can save cost in fault detection and isolation, assure adequate failure coverage by Built-In Test (BIT) and Automatic Test Equipment (ATE), reduce false alarms, and reduce maintenance training requirements. However, there are limited intelligent...
Instantaneous frequency (IF) is an important parameter in the study of non- stationary single, when instantaneous frequency is measured accurately, it has great application in electric power system single analyze, intelligent trouble diagnosis and so on. A new method for instantaneous frequency measurement which based on Empirical Mode Decomposition (EMD) and Time-Varying Auto- regressive Model (TVAR)...
The unevenness degree of flow distribution is a very important performance index for spray oil duct. According to its test requirements and technical characteristics, this paper proposes to detect the uneven distribution of spray nozzle flow rate by digital image processing technology, designs and develops auto-measurement instrument, and selects a standard component of spray oil duct to test the...
Subpixel is a key technology of image processing technology. It can achieve positioning better than entire pixel precision to the target. Against the shortcoming of slow speed of general Zernike moment subpixel location method, proposed an improved Sobel-Zernike moment positioning method in the software algorithms of sheath and insulation materials thickness image measurement system, improved the...
As the modern electronic system becomes more complicated, the new situations and works require a data acquisition system with a more accurate time parameter. Time delay between channels of high-speed data acquisition system is an important time parameter to estimate and adjust. In high-speed data acquisition system, the ADC data output time is not fixed, and may lead to the delay time of each acquisition...
Authentication technology based on geometric characteristics of hand image has the advantages of high speed and easy operation. So handkey becomes another biological characteristics authentication system as fingerprint key. Palm image preprocessing is the basic of hand shape recognition system. Denoising is a necessary preprocessing before edge detection of palm image. The paper introduces a denoising...
Analog measurement bandwidth is one of the principal indices for evaluation of performances of digital storage oscilloscope. This paper studied the digital post-treatment method which can improve the analog bandwidth of digital oscilloscope, and discussed the fundamental principle of bandwidth enhancement technology and how to design the filter. The experiment results indicate that the algorithm can...
Introduces the factors lead to phase shift of resistive voltage divider and proposes a new methods to reduce it. A chain of capacitors build a vice capacitive divider that not only provides equivalent potential screen but also compensates phase shift. The study is proceeding in simulation period, and the results indicate that the resistive voltage divider with phase shifts less than 200 µrad at 100...
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