Design and Simulation of Voltage Measurement System Based on ADC0809

The display of ordinary voltmeter is not clear enough, the measurement range is narrow and the anti-interference ability is weak. This paper studies the design and Simulation of voltage measurement system based on ADC0809. Combined with the actual production situation, using the function that ADC0809 has 8 analog inputs and can convert the analog input into digital display, this paper designs the circuit with single chip microcomputer chip AT89S51. Combined with the working principle of a / D converter and DC digital voltmeter composed of them, the voltage measurement of 0-10V is realized in this paper. The experimental results show that the measurement system has the advantages of accurate reading, wide measurement range and micro power consumption.

Research of the Solar Electromagnetic Motor

The article presents the Mendocino solar engine and the solar unipolar engine and their shortcomings. A new solar electromagnetic engine was introduced. (Research purpose) The research purpose is in studying the electrical and mechanical characteristics of a solar electromagnetic motor. (Materials and methods) The LED digital switching DC power supply LW-K3010D; magnetic field detector; digital tachometers RPM, TL-900, DT-2234C; digital LED thermometer 1M-50⁓100; digital voltmeter 0.28 Inch Red; multimeters MAS830L, MAS838L, DT-181, HP-4070L; ammeters M4204; energy meter Dudget KIT MT-4014 were used during the study. The experimental method was used. (Results and discussion) Authors experimentally developed several engine designs. With a rotor diameter of 100 millimeters and a voltage of a high-voltage solar photovoltaic module of 110 volts, the power consumption is 0.44 watts, the rotor rotation speed is 750 rpm. The solar electromagnetic motor with a rotor diameter of 250 millimeters and a total rotor weight of one kilogram consumes 1.9 watts and has 100 rpm at free mode. (Conclusions) The article presents the designs of a solar electromagnetic motor in which there are no losses for eddy currents when the rotor rotates in a constant magnetic field of the stator, and the magnetic field of the rotor currents strengthens the magnetic field of the stator. The advantages of the proposed solar electromagnetic motor are high voltage and low currents in the electric windings, low energy consumption and no losses for eddy currents, for shading solar cells and for friction in sliding contacts. The results allow us to conclude the possibility of further development of solar electric machines using neodymium magnets, ionistors, high- voltage solar modules.

The influence of quantization on level on an error of the digital voltmeter of alternating voltage

There are given the results of influence the level quantization to the accuracy of measured AC voltage by digital voltmeter. It is shown the influence of sampling frequency and the type of digital filter to effective digit capacity of conversion in case of synchronous and asynchronous sampling. There is obtained an estimate of error by representing the quantization error by centered noise with a uniform distribution. There are presented the results of modeling a digital voltmeter.

Optimization of the process of reproduction, collection, transmission, processing and display of measurement results of the National voltage unit standard – volt

Considered options for automating the calibration. An automatic calibration system has been developed, investigated and introduced into the production process, which is a software and hardware complex consisting of measuring instruments from the composition of the National standard of voltage unit – volt and additional modules. The automatic system was created on the basis of the modern programming language “Python” with the involvement of the experience of metrologists. A study of the results of calibration of reference voltage measures was carried out: the obtained results of the calibration of the DC voltage (assigned real value with expanded uncertainty) were analyzed in automatic and manual modes and using the “supraVOLTcontrol” system, which implements the Josephson effect. The automatic system was used in the study of the integral instability (nonlinearity) of a digital voltmeter, while a significant minimization of labor costs was obtained. The developed automatic calibration system allows to reduce labor intensity and duration of measurements, provides flexibility and ability to rebuild depending on emerging issues during research.

Automatic Threading and Metal Cutting in Smart Industries Using IoT

The key objective of the project is to automate an industrial process of threading and metal cutting. The main objective of the project is that it uses IOT in industries with Artificial Intelligence to monitor and control the industrial processes thus increasing productivity and to reduce cost and man power. The system uses a microcontroller for processing all user commands and EEPROM chip to save data. Digital voltmeter, ammeter, wattmeter and IR cam etc., can be linked to the same IOT device without any additional circuits.

The feasibility of using solar powered submersible pumps in the State of Kuwait: جَدوى استخدام المَضَخات الغَاطسة العاملة بِالطَاقة الشمْسِية بِدولة الكويت

The research aims to study the extent of the possible benefit from the solar fall falling in the state of Kuwait to operate submersible type pumps and to show the rate of flow of these pumps according to the change of solar radiation taking into account the spatial and temporal factor. The abundance of the area in southern Kuwait was chosen because there is good brightness for this area underground at different depths. As for the temporal factor, the timing of the transition was chosen between two important seasons that start from mid-January to mid-March, which is the period during which the brightness of the sun moves from the intermediate stage to the full brightness stage. The experimental study showed that the pump passes through two stages, the first of which is not operating and responding For the process of drawing if the solar radiation falling on the panels is less than 225 W/ m2, and the second stage occurs a response and operation of the pump gradually if the falling solar radiation is higher than the previous value, as the study showed that there is a large amount of external energy that is not exploited at some times of the day, especially in Sunny days, where the proportions decreased from 4.8 l/ 1000 watt to 1.5 l/ 1000 watt with an increase in the amount of energy from 430 w/ m 2 to 1005 w T/ m 2 The amount of flow fluctuated during the days of the study due to the differences in the sun's brightness and climate change, and the study was conducted using a method of taking periodic, daily and instant measurements, to determine the amount of energy and flow by using a solar radiation measuring device with a storage memory, which is a device for one of the companies that install solar energy panels And easily traded and other devices such as digital voltmeter and clip meter and water meter, the study concluded that the use of submersible pumps powered by solar energy with the presence of special characteristics such as the pump capacity, water depth and degree of brightness.

SOIL MOISTURE GRADIENT HYDROMETER

There is proposed the design of a gradient soil moisture meter which includes humidity sensors placed along the horizons of the soil profile, it registers humidity in some soil layers,and it is tested under field conditions. The moisture meter consists of a case, contact block, lead cables, battery, digital voltmeter and capacitive humidity sensors. The contact block is located in the neck of the case, cables are inside the case and capacitive sensors are placed horizontally along the layers of the soil profile. The battery and digital voltmeter are connected to the contact block and placed on the soil surface. The device is installed vertically in the corner of the soil section. The device is installed vertically in the corner of the soil section. Humidity sensors are embedded in the side walls of the section. The device case and all cable connections to the case are sealed. During the field test there was arranged a flood site around the device, the soil was saturated up to the full moisture capacity and the indicators were calibrated: soil moisture – the voltage of the analog outputs. In parallel, the soil moisture was measured by the thermostatic-weight method. The humidity measurement error did not change for two weeks. The efficiency of the proposed design of the moisture meter is confirmed. The stability of the moisture meter was established within 3 weeks with a relative measurement error of 2 … 3%. The moisture meter is installed in the soil for the whole growing season.