Suspended sediment and dye concentration measurements using a digital technique

Lygouras, John N.; Tarchanidis, K.N.; Tsalides, G.

doi:10.1080/002072100132507

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Three-phase sine-wave signal generator is a common signal source, which is widely used in scientific research, productive practice and teaching experiments and other fields [1] . There are three kinds of signal generators at present.…”

Section: Introductionmentioning

confidence: 99%

The Design and Implementation of High Precision Three-Phase Sine-Wave Signal Generator

Kang

Zheng

et al. 2014

AMM

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A design and implementation method of high precision three-phase sine-wave signal generator is proposed based on MCU and FPGA. For the traditional design method, direct analog synthesis method and phase locked loop (PLL) technology are used to design the signal generator. So the function, the precision and other aspects are inadequate. Aiming to the problem, a signal generator is designed based on direct digital frequency synthesis (DDS) technology. The MCU is used to control the peripheral devices and the frequency and phase control word can be obtained. The DDS module is achieved by EP4CE6E22C8 and the waveform lookup table addresses are outputted. The digital three-phase sine-wave data can be read from the lookup table. Through the three-way D/A converter and the amplifier circuit, the digital signal is converted to analog signal and the three-phase sinusoidal wave is outputted. The precision can be improved by increasing the sampling points, phase accumulator bits and D/A bits, and then, high precision three-phase sine-signal can be obtained and the adjustable frequency precision is 0.001.

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Section: Introductionmentioning

confidence: 99%

The Design and Implementation of High Precision Three-Phase Sine-Wave Signal Generator

Kang

Zheng

et al. 2014

AMM

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“…The digitally synthesized sine waveform (Direct Digital Synthesis, DDS) is a well-known method and has been applied to many embedded applications [1]. This technique can be used to create a positive digital sine waveform.Compared to other frequency composing method, Direct Digital Frequency Synthesis(DDS) has been the most popular trend in modern frequency synthetic technique for its excellent characteristics.…”

Section: Introductionmentioning

confidence: 99%

Design of Digital Controlled Signal Generator Based on DDS and MCU

Chen

Yuan

2012

AMR

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Its advantage to use DDS chip is output signal frequency bigger, and precision higher, But users can't change the output signal waveforms. The MCU can produce the required arbitrary waveforms, but its program execution of the order limit the speed.So we use their Synergy to design the digital controlled signal generator. The System has the advantage of output good quality waveform, frequency of precision and stability ,and high frequency, empty, amplitude and phase is to step into the need.

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mentioning

confidence: 99%

Digitally Synthesized Alternative Current Sinusoidal Waveform for Resistive Sensor Measurements

Tarchanidis¹,

Soilemes²

2011

JESTR

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This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is alternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller's data memory and are applied to the DAC's digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC's output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcontroller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.

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Suspended sediment and dye concentration measurements using a digital technique

Cited by 4 publications

References 3 publications

The Design and Implementation of High Precision Three-Phase Sine-Wave Signal Generator

The Design and Implementation of High Precision Three-Phase Sine-Wave Signal Generator

Design of Digital Controlled Signal Generator Based on DDS and MCU

Digitally Synthesized Alternative Current Sinusoidal Waveform for Resistive Sensor Measurements

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