scholarly journals The Solution for the Thermographic Measurement of the Temperature of a Small Object

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5000
Author(s):  
Arkadiusz Hulewicz ◽  
Krzysztof Dziarski ◽  
Grzegorz Dombek
Keyword(s):  
Temperature Measurement ◽  
Practical Method ◽  
Measuring System ◽  
Small Object ◽  
Electronic Components ◽  
Full Load ◽  
Thermographic Camera ◽  
Electronic Elements ◽  
Thermographic Measurement ◽  
Selection Of

This article describes the measuring system and the influence of selected factors on the accuracy of thermographic temperature measurement using a macrolens. This method enables thermographic measurement of the temperature of a small object with an area of square millimeters as, e.g., electronic elements. Damage to electronic components is often preceded by a rise in temperature, and an effective way to diagnose such components is the use of a thermographic camera. The ability to diagnose a device under full load makes thermography a very practical method that allows us to assess the condition of the device during operation. The accuracy of such a measurement depends on the conditions in which it is carried out. The incorrect selection of at least one parameter compensating the influence of the factor occurring during the measurement may cause the indicated value to differ from the correct value. This paper presents the basic issues linked to thermographic measurements and highlights the sources of errors. A measuring stand which enables the assessment of the influence of selected factors on the accuracy of thermographic measurement of electronic elements with the use of a macrolens is presented.

Cellulose Electroactive Paper (EAPap): The Potential for a Novel Electronic Material

2008 ◽  
Vol 1129 ◽  
Author(s):  
Joo-Hyung Kim ◽  
Kwangsun Kang ◽  
Sungryul Yun ◽  
Sangyeul Yang ◽  
Min-Hee Lee ◽  
...  
Keyword(s):  
Electronic Material ◽  
Mechanical Performance ◽  
Electronic Components ◽  
Electromechanical Properties ◽  
Actuation Mechanism ◽  
Mechanical Sensors ◽  
Electronic Elements ◽  
Stretching Ratio ◽  
Cellulose Surface ◽  
Quality Metal

AbstractCellulose electro-active paper (EAPap) has attracted much attention as a new smart electronic material to be utilized as mechanical sensors, bio compatible applications and wireless communications. The thin EAPap film has many advantages such as lightweight, flexible, dryness, biodegradable, easy to chemically modify, cheap and abundance. Also EAPap film has a good reversibility for mechanical performance, such as bending movement, under electric field. The main actuation mechanism governed by piezoelectric property can be modulated by material direction and stretching ratio during process. In this paper we present the overview as well as fabrication process of cellulose EAPap as a novel smart material. Also we propose the method to enhance the piezoelectricity, its mechanical and electromechanical properties. In addition, the fabrication of high quality metal patterns with Schottky diode on the cellulose surface is an initiating stage for the integration of the EAPap actuator and electronic components. The integration of flexible actuator and electronic elements has huge potential application including flying magic carpets, microwave driven flying insets and micro-robots and smart wall papers.

Manufacturing and Characterization of Nanostructures Using Scanning Tunneling Microscopy with Diamond Tip

2016 ◽  
Vol 42 ◽  
pp. 14-46 ◽  
Author(s):  
Oleg G. Lysenko ◽  
Vladimir I. Grushko ◽  
Sergey N. Dub ◽  
Eugene I. Mitskevich ◽  
Nikolay V. Novikov ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Measuring System ◽  
Scanning Tunneling ◽  
Surface Load ◽  
Tunneling Microscopy ◽  
Electromagnetic Probe ◽  
High Pressure High Temperature ◽  
Single Crystal Diamond ◽  
Selection Of

Nanoscale experiments with diamond tip that include processing, visualization and tunneling spectroscopy of the surface are presented. Single crystal diamond synthesized by the temperature gradient method under high pressure–high temperature (HPHT) conditions is proposed as a multifunctional tip for scanning tunneling microscopy (STM). Sequence of the procedures covering growing crystals with predetermined physical properties, selection of the synthesized crystals with the desired habit and their precise shaping have been developed. The original STM’s peculiarity is the electromagnetic probe-to-surface load measuring system. The results of fabrication and characterization of nanostructures for nanoelectronics, data storages and biology are demonstrated and discussed.

Internal Temperature Measurement of Electronic Components

2015 ◽  
pp. 165-184
Author(s):  
Eric Joubert ◽  
Olivier Latry ◽  
Pascal Dherbecourt ◽  
Maxime Fontaine ◽  
Christian Gautier ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Internal Temperature ◽  
Electronic Components

System Reliable Probability for Multi-AUV Cooperative Systems under the Influence of Current

2019 ◽  
Vol 72 (06) ◽  
pp. 1649-1659
Author(s):  
Qingwei Liang ◽  
Tianyuan Sun ◽  
Junlin Ou
Keyword(s):  
Marine Environment ◽  
Reliability Index ◽  
Autonomous Underwater Vehicle ◽  
Influencing Factor ◽  
Practical Method ◽  
Underwater Vehicle ◽  
Cooperative Systems ◽  
Cooperative System ◽  
Structure Selection ◽  
Selection Of

Real multi-Autonomous Underwater Vehicle (AUV) cooperative systems operate in complicated marine environments. The interaction between a multi-AUV cooperative system and its marine environment will affect the reliability of the system. Current is an important influencing factor of multi-AUV cooperative systems. A reliability index of multi-AUV cooperative systems known as System Reliable Probability (SRP) is proposed in this study. A method to calculate SRP is introduced, and the influence of current on SRP is discussed in detail. Current is considered an attack source, and the degree of its influence on SRP is calculated. As an example, the performance of this method is shown on two multi-AUV cooperative systems. Results show that the influence of the same current environment on different structures of the multi-AUV cooperative systems differs. This result provides a reference for the structure selection of multi-AUV systems. This study provides a practical method to estimate the reliability of multi-AUV cooperative systems.

A Preliminary Report on the Small Finds from Excavations at Lepcis Magna 1994-95

1996 ◽  
Vol 27 ◽  
pp. 11-15 ◽  
Author(s):  
Sally-Ann Ashton
Keyword(s):  
Preliminary Report ◽  
Soft Material ◽  
Short Report ◽  
Small Object ◽  
The West ◽  
Bow And Arrow ◽  
Female Figures ◽  
Small Finds ◽  
Selection Of

AbstractThis is a short report on a selection of the small finds from the excavations of a Roman house which lies to the west of the theatre at Lepcis Magna. The pottery and coins from the current levels of excavation have been dated to the late 5th and early 6th centuries AD; however, many of the objects seem to be residual. One of the most interesting finds was a solid bronze ring, decorated with two female figures. The object seems to have been functional, with the ring and the bars on which the woman are seated being attached to a soft material such as leather. These characteristics, which can be found on parallel examples, along with other bronze artefacts from the site suggest that the former was part of the decoration of a horse drawn carriage. Several pieces of jewellery were found including two gemstones which were once part of a finger ring, dating from the 2nd century AD. The first is a garnet and shows the goddess Artemis/Diane in her role of huntress, holding a bow and arrow. The second, which is a cornelian, is decorated with a portrait of a youth and may well be a local copy of a type circulating at the time. Many pieces of locally crafted bone and ivory were also found, including a bone plaque with a floral decoration which was originally intended as a decorative inlay for a small object such as a box. A similar piece from Egypt has been dated to around the 3rd or 4th centuries AD.

scholarly journals The Proposition of an Automated Honing Cell with Advanced Monitoring

Machines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 70
Author(s):  
Adam Barylski ◽  
Piotr Sender
Keyword(s):  
Sound Intensity ◽  
Process Efficiency ◽  
Machining Parameters ◽  
Shape Deviation ◽  
Profile Parameter ◽  
Abrasive Grain ◽  
Oil Cooler ◽  
Thermographic Camera ◽  
On Line ◽  
Selection Of

Honing of holes allows for small shape deviation and a low value of a roughness profile parameter, e.g., Ra parameter. The honing process heats the workpiece and raises its temperature. The increase in temperature causes thermal deformations of the honed holes. The article proposes the construction of a honing cell, containing in addition to CNC honing machine: thermographic camera, sound intensity meter, and software for collecting and analyzing data received during machining. It was proposed that the level of sound intensity obtained during honing could be monitored continuously and that the images from a thermographic camera could be analyzed on-line. These analyses would be aimed at supervising honing along with the on-line correction of machining parameters. In addition to the oil cooler, the machining cell may have an automatic selection of the grain trajectory shape, with specified value of the radii of curvature of the abrasive grain trajectories, according to the wall thickness of the honed workpiece, which will result in reducing the temperature generated during honing. Automated honing cell can mostly increase honing process efficiency. Simulations in FlexSim showed the possibility of increasing the efficiency of the honing process more than 20 times.

About the Accuracy of Positioning of a Linear Robot Equipped with a High Resolution Optical System

2014 ◽  
Vol 657 ◽  
pp. 844-848 ◽  
Author(s):  
Vasile Nasui ◽  
Mihai Banica
Keyword(s):  
Experimental Data ◽  
Dynamic Programming ◽  
High Resolution ◽  
New Products ◽  
Maximum Velocity ◽  
Measuring System ◽  
Velocity Variation ◽  
Target Point ◽  
Linear Actuators ◽  
Selection Of

Robots have rapidly become key elements to improve general performances of the existent products, to add up new supplementary characteristics or even in view of creating new products that were impossible to create prior to this research. This paper presents a measuring system with optical device in view of determining velocity variation on the investigated axe of the maximum velocity and acceleration or of their variation in dynamic circumstance. The advanced research of precision parameters is a technical necessity, which leads to the selection of linear actuators according to the conditions of usage. Has been made a measurements stand in order to determine these parameters, a stand equipped with laser ruler with a system of numeric acquisition of experimental data. By analyzing the measuring values presented in this paper it can be concluded that when the positioning precision in the target - point of an acting linear robot or when the trajectory precision is absolutely required, the obtained results must be taken into account. We can operate these appropriate corrections in the system of dynamic programming of the robot.

The Selection of Thermistors for the Temperature Measurement Gear

1970 ◽  
Vol 111 (5) ◽  
pp. 59-62
Author(s):  
J. Leskauskaite ◽  
A. Dumcius
Keyword(s):  
Temperature Measurement ◽  
Measurement Errors ◽  
Numerical Data ◽  
Optimum Selection ◽  
Selection Of

The parameters represented on manufacturer datasheet are usually insufficient for the optimum selection of thermistors. Some manufacturers give generalized numerical data of R(T) dependences. Using this data it is possible to select successfully the most suitable thermistor and equation for describing of T(R) dependence. It is shown that by selecting four points in the generalized characteristic it is possible to calculate the coefficients of the approximation equation. By the application of these coefficients in the calculations the temperature measurement errors can be decreased by an order. The results of calculations and experiment are given. Ill. 4, bibl. 8, tabl. 5 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.111.5.357

Measurement of High Thermodynamic Temperatures in the DLR Solar Furnace by UV-B Detection

Solar Energy ◽  
2002 ◽  
Author(s):  
Nicola Rohner ◽  
Andreas Neumann
Keyword(s):  
Temperature Measurement ◽  
Temperature Measurements ◽  
Solar Furnace ◽  
Correct Selection ◽  
Basic Material ◽  
Atmospheric Conditions ◽  
Spectral Measurements ◽  
System Temperature ◽  
Selection Of

The correct selection of the operating wavelength is essential for a precise pyrometric temperature measurement on solar irradiated samples, as the measurement may be disturbed by reflected solar radiation. Atmospheric conditions and particularly the emissivity as basic material property determine the amount of this reflected and the emitted radiation from a sample under investigation. An approach to solve this problem by using a monochromator system for temperature measurement in the UV-B range was developed and experimentally tested. With this system, temperature measurements were possible beginning at 1320°C and ranging up to about 2400°C. Two calculation methods are described and compared. The influence of the calibration temperature on the quality of the temperature measurement is shown. Measurements on a blackbody up to 1500°C were performed for calibration purpose. Temperature measurements on a real solar heated magnesia sample up to 2400°C are presented and discussed. These spectral measurements on hot bodies irradiated in the DLR Solar Furnace led to the final specification of the measurement wavelengths to be in the range from 280 nm to 293 nm.

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