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This text describes the data presented in the paper: UHF RFID Tag Antenna-Based Sensing for Corrosion Detection & Characterization Using Principal Component Analysis

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Introductory information
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Files included in the data deposit (include a short description of what data are contained): 

The file name M0, M1, M3, M6, M10 and M12 respectively corresponds to the test results for corrosion samples (Fig. 1 in the paper) exposed of 0, 1, 3, 6, 10, and 12 months.

Explain the relationship between multiple data sets, if required:


Key words used to describe the data:

Corrosion, UHF, RFID, Power, Frequency, Phase

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Methodological information
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A brief method description? what the data is, how and why it was collected or created, and how it was processed:

The data set includes the forward power and backscattered power from UHF RFID tag.

The data is generated using the RFID platform with an antenna sensor in the variations of frequency (902-928 MHz in a step of 1 MHz) and corrosion samples (6 samples), each of which is repeated for 4 times. The test is to find the minimum forward power (sent by the reader, eq. 3 in the paper) to activate the tag and its corresponding backscattered power (eq. 1 in the paper) from the tag.

These two powers are combined to generate the AID (eq. 6 in the paper) to indirectly indicate the impedance of the antenna in wireless. Using the principal component analysis, the features are extracted from the AID and therefore used to detect and characterise the corrosion.

Instruments, hardware and software used: 

ThingMagic Mercury xPRESS platform

Date(s) of data collection: 

15/09/2015

Geographic coverage of data:



Data validation (how was the data checked, proofed and cleaned):



Overview of secondary data, if used:



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Data-specific information
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Definitions of names, labels, acronyms or specialist terminology uses for variables, records and their values: 

Typical item in the data set:
tag{epc=0x999999999999999999999999 protocol=18 ant=1 readcount=5 rssi=-51 frequency=927000 timestamp=2007-01-01T03:16:48.408 phase=81 gpio=1111 
tag: This response is from RFID tag
epc: The code of EPC in hexadecimal
protocol: The power sent by the reader p=18*0.5+10 (dBm)
ant: The test time
readcount: The number of times the tag was read
rssi: The receive signal strength of the tag response in dBm. 
frequency: The frequency on which the tag was read (kHz)
timestamp: The time the tag was read, relative to the time the command to read was issued, in milliseconds.
phase: Average phase of tag response in degrees (0กใ-180กใ)
gpio: The signal status (High or Low) of all GPIO pins when tag was read. 

Explanation of weighting and grossing variables: 



Outline any missing data:



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Contact
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Please contact rdm@ncl.ac.uk for further information