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Electricity is widely used in modern society. Improving the speed of information collection is an important way to realize scientific scheduling and management of electrical energy. Application of the smart meter, which is an extension of traditional power meter function and the use of distributed management in electrical energy operations, is an effective way to solve the above problems. This paper...
This paper presents a video surveillance system as the main chip based on DSP, and RTL8019AS as ethernet interface chip. Realization of upper computer software system based on the socket class of visual C, and the locaal computers is composed of the camera, DSP control unit, CPLD interface, ethernet interface, wireless router, etc. the functionmodules of system. This paper introduces the interface...
This study analyzed and simulated special Golay (20, 8) channel code. When the bit error probability Pb = 10-5, Hamming (16, 11) has about 0.5dB coding gain compared with Golay Code (20,8) t = 3, and Golay Code (20,8) t = 4 has about 0.2dB coding gain compared with Hamming (16, 11). Thus, Golay Code (20, 8) t = 4 has about 0.7dB coding gain compared with Golay Code (20,8) t = 3. This study also analyzed...
As we all know, brush less DC motor, which has been widely used in industrial control fields, has the characteristic of simple, reliable and easy to maintain, as well as high efficiency without mechanical change, and easy-to-be high-capacity, high speed, etc. TMS320F28335, which is the newest 32-bit float point DSP produced by TI company, is the best DSP chip in the domain of motion control. On the...
In order to realize high-precision and real-time flow measurement, in this paper according to the measurement principle of ultrasonic transit time method, a low-power microprocessor MSP430 is used as the core of this system, and a high-precision measurement chip TDC-GP2 is specially adopted to collect the time difference signals in real time, hereby we design a new ultrasonic transit time flow-meter...
A wireless video processing module using TI's DaVinci chip TMS320DM6446 as the main chip is described in this paper. In this system analog video signal is digitized by a high speed video decoding circuit and computed by the DSP chip and transmitted over by model of 3G wireless network. The paper describes the design scheme of the wireless video processing module hardware in detail. The hardware is...
This paper presented rapid and effective palm-print recognition based on OMAP3530 chip which is multimedia universal chip. Paper deployed USB camera as a palm-print images' acquisition equipment, used the ARM + DSP multi-core OMAP3530 processor technology as palm-print image recognition processing, and sent the recognition results to the user interface ultimately. Linux Operating System run in the...
The recovery of water loss from leaks in transmission and distribution pipes can provide a solution, at least partially, to water shortages caused by insufficient water resources and / or limited water treatment capacity. This paper introduces a new, low-cost and easy-to-use system that will help water utilities to dramatically improve the effectiveness of locating leaks in the water pipes. The system...
A family safety monitoring system is designed, which integrated function of telephone alarm, remote control by network, and video linkage. Host alarm system, controlled by MCU, collects data wirelessly from sensors, and makes remote alarm by DTMF. The video processing and transmitting system, with a DSP chip of TMS320F2812 as the core processor, transmits the video data by means of Bluetooth indoors,...
Edge detection of human face is one of the important bases in human face detection and recognition. This article firstly summarizes the basic methods of edge detection and the basis of Sobel operator and Canny operator, then, from a practical perspective, puts forward an novel method that is based on the integration of improved Sobel operator and Canny operator, moreover its results are thinned lastly...
The wavelet transform has been widely used in the analysis of power system as an effective method to analyze digital signals. In order to detect the harmonics more accurately, this paper applies the wavelet packet theory in harmonics detection, the method make full use of it's advantage in deviding the frequency band more meticulous, it can get the harmonics' waveforms more accurately. The paper discusses...
Magnetic suspension and magnetic suspension motor control technology have developed with the development of magnetic suspension technology. In recent years, researches on magnetic suspension and magnetic suspension motor control technology are getting more and more active, and have made a lot of satisfactory achievement. This article systemically summarizes research achievement and current status...
DSP control and relative technologies have attracted the attention of multi-disciplines engineering researchers and educators, and are becoming a new and active field. This paper gives some discussions about teaching embedded systems in automation major, such as teaching target, course content, teaching methods and course examination. Through four years' practices, remarkable effects are obtained.
DSP control and relative technologies have attracted the attention of multi-disciplines engineering researchers and educators, and are becoming a new and active field. Think over the characteristic of DSP course teaching, this article developed the DSP experimental system based on the chip of TMS320LF2407 and XC95144. The experimental system mainly consists of a TMS320LF2407 chip, peripherals on board,...
The Specific Harmonic Elimination Pulse Width Modulation (SHEPWM) is used in a neutral-point-clamped converter. The SHEPWM is implemented in a DSP chip by software. Transient current between different PWM in open loop operation is small. Simulations of close loop control show that work of SHEPWM in dynamic process requires the voltage vector rotate steadily while the requirement on its length change...
G.729 standard has been widely used in the VoIP system. But the computational complexity is too large to real-time work via low-end DSP chip or soft-DSP on embedded devices. Even though the G.729A, it is still hard to implement. In this paper, three methodologies for effective complexity reduction of G.729 are proposed. The sub-optimal algorithm is employed to the search procedure of fixed codebook;...
In this paper, the DMA transfer tactics is used to optimize a packed/planar video format conversion program. The program method to employ the DMA transfer in the video processing algorithms will be present in this paper. The objective is to develop the efficiency of the DSP on loading the large image data, which are stored in the external memory. The synchronous problem of the DMA transfer data flow...
This paper puts forward the background of the CRC arithmetic by which it means how important the arithmetic can be in the field of the communication, tells us the principles of CRC arithmetic, introduces a kind of common ways about how to make the code and how to decode of the CRC arithmetic, uses a lot of words to introduce how the CRC codes be made through one kind of the CRC arithmetic which is...
In order to track with the beacon real time and high precisely for fine tracking system in free space optical communication, a novel control algorithm is presented in the paper. The kalman filter is used to predict the bean's feature, and multi-resolution correlative matching operation and fast searching method are adopted to search the beacon's center. The PED controller is used to realize the feedback...
In this paper, a design plan of the high-speed information transmission has been brought forward. The equipment which adopts open-style interface design can be used for the transmission of the audio and video information, as well as the high-speed datas information. The DSP chip is used as the controller of the information transmission system, and two 1394 chips are used as link layer and physical...
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