Research on temperature acquisition system of printing machine oven based on wireless Sensor network

Aiming at the problems such as limited transmission distance of traditional temperature data, complex wiring and aging line, ZigBee wireless network is introduced into the temperature acquisition system of the intaglio printing machine oven, which makes the whole system easy to operate and simple, and greatly improves the transmission distance of temperature signal. The composition of the temperature monitoring system and the hardware circuit of the ZigBee master node are described, including DC 5 V power supply circuit and USB interface power supply circuit, the connection circuit between the RADIO frequency board and the backboard, to realize the construction of the network and the wireless reception of temperature data. To realize the construction of the network and wireless reception of temperature data. It combines ZigBee wireless communication technology to complete real-time transmission of multi-point temperature data, realize real-time LCD display of multi-point temperature data collected by DS18B20, and realize ZigBee networking function based on ZigBee protocol stack.

Portable microwave radiometer for wearable devices

This paper presents a new circuit of the miniature microwave radiometer for wearable devices, which can be used to monitor the core body temperature (CBT) of internal human tissues continuously 24/7. The measurement results of the proposed device, as opposed to the known miniature wearable radiometers, remain unchanged when the impedance of the examined area varies. We have derived an analytical expression for radiometer measurement error based on parameters of device components. This formula allows accuracies to be estimated and optimal parameters of the circuit to be selected to minimise measurement error at a design stage. It is shown that measurement error is independent of the antenna reflection coefficient and the temperature of the radiometer front-end. A prototype of the single-channel miniature radiometer has 32 х 25 х 14 mm3 dimensions and USB interface communication with PC. A 28-hour run of the device has shown that it is highly stable, and a maximum drift in temperature is 0.15 ̊C. Operating frequency range was 3400-4100 MHz, supply voltage - 5V; power supply of the radiometer in measurement mode is 210 mA; time constant of the radiometer without being averaged is 0.6 sec, at the same time, standard deviation δ = 0.17 ̊С, with further averaging during 4 sec δ=0.052 ̊С, with averaging during 30 sec δ =0.017 ̊C; when there were input reflections R2=0.25, an error in measuring brightness temperature shifted by 0.2 ̊ C; with 10 ̊C variations in ambient temperature the shift was 0.15 ̊C. Introduction of self-contained power supply and wireless communication with smartphone have made it possible to use the proposed radiometer as a wearable device to monitor the temperature of internal tissues and CBT during human activities.

Design Of A Thermophoretic Sampling System To Collect Soot From Flames

<div><b>Project Objective</b></div><div>Design a thermophoretic sampling system and purchase all required material and equipment for the design.</div><div><br></div><div><b>Methodology to be Adopted</b></div><div>Study the systems available in the market and design the most effective and cost-efficient system. It includes studying different motors and associated components that are available in the market and selecting the right components to suit the purpose.</div><div><br></div><div><b>Brief Summary of the Project</b></div><div>The report discusses the planning phase of the project to the end of the design phase along with a few suggestions for a further scope of work. This project includes choosing the best system to design with-in the few well-known existing models such as the multi-probe system, pneumatic and electric linear motor system, amongst others. After considering multiple factors, an electric linear motor configuration architect was chosen for the design. The secondary research is to find the right motor (stator), slider, servo drive, trailing chain cable, power supply, lubricant, USB interface converter, tweezer, set screw, washer, thin hex nut, gasket sealant and a novel designed tweezer holder according to the design requirement and fabrication ease. The major objective of the design is to achieve an ultra-high-speed stroke with a residue time as little as 3ms to 100ms for collecting soot from different flames. Another novel highlight of the project was the TEM mesh (micro-grid) holder using a tweezer and an in-house designed tweezer holder. All the required purchase orders are placed for the components needed for designed thermophoretic sampling device. </div>

Design Of A Thermophoretic Sampling System To Collect Soot From Flames

<div><b>Project Objective</b></div><div>Design a thermophoretic sampling system and purchase all required material and equipment for the design.</div><div><br></div><div><b>Methodology to be Adopted</b></div><div>Study the systems available in the market and design the most effective and cost-efficient system. It includes studying different motors and associated components that are available in the market and selecting the right components to suit the purpose.</div><div><br></div><div><b>Brief Summary of the Project</b></div><div>The report discusses the planning phase of the project to the end of the design phase along with a few suggestions for a further scope of work. This project includes choosing the best system to design with-in the few well-known existing models such as the multi-probe system, pneumatic and electric linear motor system, amongst others. After considering multiple factors, an electric linear motor configuration architect was chosen for the design. The secondary research is to find the right motor (stator), slider, servo drive, trailing chain cable, power supply, lubricant, USB interface converter, tweezer, set screw, washer, thin hex nut, gasket sealant and a novel designed tweezer holder according to the design requirement and fabrication ease. The major objective of the design is to achieve an ultra-high-speed stroke with a residue time as little as 3ms to 100ms for collecting soot from different flames. Another novel highlight of the project was the TEM mesh (micro-grid) holder using a tweezer and an in-house designed tweezer holder. All the required purchase orders are placed for the components needed for designed thermophoretic sampling device. </div>

GONIOMETER CONTROL

The control unit for the goniometer has been developed and manufactured. The unit includes four independent programmable stepper motor control channels, three logical channels for analyzing the state of limit switches and a power supply. Powerful field-effect transistors of the company International Rectifier are used as controlled power switches. To generate output signals and communicate with a computer, an ATmega328 microprocessor is used in each control channel. This channel design allows you to control almost any type of stepper motors, you only need to replace the control program. The software is written using the WinAVR package which has a General Public License. Data transfer between the computer and the unit is carried out via the USB interface.

The Rehapiano—Detecting, Measuring, and Analyzing Action Tremor Using Strain Gauges

We have developed a device, the Rehapiano, for the fast and quantitative assessment of action tremor. It uses strain gauges to measure force exerted by individual fingers. This article verifies the device’s capability to measure and monitor the development of upper limb tremor. The Rehapiano uses a precision, 24-bit, analog-to-digital converter and an Arduino microcomputer to transfer raw data via a USB interface to a computer for processing, database storage, and evaluation. First, our experiments validated the device by measuring simulated tremors with known frequencies. Second, we created a measurement protocol, which we used to measure and compare healthy patients and patients with Parkinson’s disease. Finally, we evaluated the repeatability of a quantitative assessment. We verified our hypothesis that the Rehapiano is able to detect force changes, and our experimental results confirmed that our system is capable of measuring action tremor. The Rehapiano is also sensitive enough to enable the quantification of Parkinsonian tremors.

Research of compromising USB interface electromagnetic emanations in the infocommunication networks control system

One of the key directions in the development of modern society is the formation of an integrated information space based on the latest information technologies. The widespread use of information technologies and infocommunication networks for the transmission, reception, processing and storage of information in various fields of activity, on the one hand, contributes to an increase in the efficiency of this activity, and on the other hand, it causes the emergence of threats of information leakage through technical channels, which are understood as the uncontrolled dissemination of information signal from its source through the physical environment to a technical means that intercepts information. In the list of threats, an important place is occupied by threats of information leakage through channels of compromising electromagnetic emanations, as well as a result of interference of information signals in power lines of technical means of information processing, connecting lines of auxiliary technical means and systems, ground circuits and extraneous conductors. To protect information from its leakage due to compromising electromagnetic emanations through communications connecting the system blocks of computing facilities with peripheral devices, it is important to analyze the formation of these signals and emissions. The article presents the results of the study of compromising electromagnetic emanations of the USB 2.0 interface, carried out to solve the problems of assessing the security of information at the objects of information activity. The processes of formation of technical channels of information leakage by compromising electromagnetic emanations at use of the USB-interface in structure of control system of information and communication networks are considered. The images of the signal levels of the compromising electromagnetic emanations of the USB 2.0 interface obtained with the spectrum analyzer ROHDE & SCHWARZ FSW 13 (Signal & Spectrum Analyzer) using the R & S Active Dipole Antenna HE527 are shown. As a result of the analysis of the form and spectrum of signals in the USB cable (test mode is off, test mode is on) it is established that in the USB interface there is a constant transmission of service packets to support the interface. When the test mode is turned on, additional pulse sequences appear on the spectrogram. The frequency of the first harmonic for the USB 2.0 interface is in the region of 240 MHz.