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noncontact temperature sensors

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Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005925
EISBN: 978-1-62708-166-5
... control systems, including contact sensors, noncontact sensors, controllers, energy-flow regulators, measurement instruments, and set-point programmers. Common contact sensors include temperature scales, thermocouples, and resistance temperature detectors, whereas optical pyrometers and on-line radiation...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003239
EISBN: 978-1-62708-199-3
... a test surface Thermometry, which is the measurement of temperature. These techniques are separated into two categories: (a) direct contact, in which a thermally sensitive device or material is placed in physical and thermal contact with the test piece; and (b) noncontact techniques that depend...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003199
EISBN: 978-1-62708-199-3
... reduces their usage in the metals industry. Resistance temperature detectors are normally larger in size and slower in response than thermocouples. However, the new thin-film deposited detectors minimize this disadvantage, which characterizes conventional wire-wound detectors. Noncontact Sensors...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005853
EISBN: 978-1-62708-167-2
..., and hundreds of other applications. The process is fast and usually very easy to control. Of course temperature is a key parameter that needs to be controlled and often recorded for quality records. The choice instrument for measuring temperature is a noncontact infrared (IR) thermometer. Infrared...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006453
EISBN: 978-1-62708-190-0
..., which introduced a real-time, image-based, noncontact approach to temperature measurement—a welcome alternative to point temperature sensors attached to the surface of the part, or temperature-sensitive paints or tapes that had been used previously. In TNDE, applied external excitation acts...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006968
EISBN: 978-1-62708-439-0
... main categories: thermal/temperature-monitoring devices, optical devices, acoustic and vibration sensors, 3D scanning devices, and others ( Table 1 ). These devices can also be classified by the monitoring objective, such as printing (top)-surface-monitoring sensors, part-monitoring sensors...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006336
EISBN: 978-1-62708-179-5
... machines or noncontact visual sensors with image analysis capabilities. The type of techniques and equipment required to perform a dimensional inspection depends on a number of factors, such as the size and shape of the part, speed of inspection/automation, tolerance requirements, portability...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005638
EISBN: 978-1-62708-174-0
...). The weld bead temperature can be measured with a near-infrared sensor, which can help assess weld quality. Spatter generated from the laser weld process also can be monitored for process consistency and stability with a near-infrared sensor. Grouping the various radiative emissions from the keyhole...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006978
EISBN: 978-1-62708-439-0
... for the laser controller or motors (robot control or recoater blade). Environmental sensors report on the temperature, oxygen level, pressure, and gas flow in the build chamber or in the vicinity of the build process. These basic sensors evaluate a range of key process parameters ( Ref 4 ) and provide...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006409
EISBN: 978-1-62708-192-4
... case dependent. For some analytical expressions of α, the reader is referred to Ref 3 and 6 . Frictional Heating Measurements (Dry Contact) Many techniques are available for measuring the temperature that results from frictional heating. Both contact- and noncontact-type sensors can be used...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005553
EISBN: 978-1-62708-174-0
... or a noncontact method employing either an infrared (IR) point source or a vision-based digital IR camera. Temperature distribution sensing methods involve certain disadvantages. Thermocouples, in particular, require intimate contact with the weldment at all times, while IR systems require calibration...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003198
EISBN: 978-1-62708-199-3
...- CONTROL SYSTEMS used in heat treating in- response. A resistance thermometer is more accu- type sensors. Their electrical resistance is propor- clude temperature sensors, controllers, final con- rate and stable than a thermocouple. However, tional to temperature...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005514
EISBN: 978-1-62708-197-9
..., and the temperature fluctuations (θ) about the mean are measured. Knowing the mass of the sample, m , the power, P , and the frequency of the modulation of the heat source, ω: (Eq 2) C p = P / ( m · θ · ω ) Details are given in Ref 12 and Ref 14 Modern variants are noncontact...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006898
EISBN: 978-1-62708-392-8
.... The temperature sensor can be fabricated using a polymer-semiconductor ( Ref 48 ). Structures and Working Mechanisms of Energy Harvesters Piezoelectric Nanogenerator Structure and Mechanism In 1880, brothers Jacques and Pierre Curie discovered piezoelectricity. Their experiment was basically on quartz...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006871
EISBN: 978-1-62708-395-9
... thermometer or a noncontact thermometer (e.g., according to EN 16795, Ref 25 ). If the surface temperatures are not measured directly, white standard or white panel sensors can also be used to better estimate the temperature of lighter-colored samples (e.g., for polyvinyl chloride window profiles; EN 513...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0007023
EISBN: 978-1-62708-439-0
... in-process control. The metal AM processes L-PBF and DED work at elevated temperatures; therefore, contactless NDT technologies are considered the most appropriate option to operate under these conditions. Taking advantage of the layer-by-layer build method, IPI offers an ideal way to verify part quality...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006858
EISBN: 978-1-62708-392-8
..., as contact and noncontact techniques. This article focuses on the working principles of contact and noncontact printing methods along with their advantages, disadvantages, applications, and challenges. Contact printing methods include micro-plotter, pen printing, screen printing, nanoimprint printing...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001470
EISBN: 978-1-62708-173-3
...) System utilizing a CCD array camera tracking an image with simulated smoke and spatter from a FCAW process Ultrasonic sensors, of both the contacting (piezoelectric crystal) and noncontacting (electromagnetic acoustic transducer) varieties, have been used in the laboratory to evaluate...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006557
EISBN: 978-1-62708-290-7
... treatment, and postprocessing HIP to eliminate defects detrimental to properties from the as-built condition. The use of noncontact thermal, optical, and ultrasound techniques for inspecting AM components are also considered. The final section summarizes the knowledge gap in our understanding of the defects...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003267
EISBN: 978-1-62708-176-4
..., bondable resistance strain gages, and clip-on extensometers or compressometers. Also applicable to low-temperature strain measurements but less commonly used are capacitive transducer methods ( Ref 11 ), noncontact laser extensomers, and linear variable differential transformers (LVDT) with extension rods...