CNRAD TESTIT Localization beacons

Alberto García Molero12/02/2013 RadWG meeting

DUT: Localization beacon DGB102• TETRA Project: IT is investigating a solution to gelocate people in underground

areas where no GPS is available• Indoor Localization Solution tested: SYSOCO beacons (model DGB102)

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Overview of ILS principles

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CNRAD Test: Schema of the installation

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TSG 46 (area 463)

CNRAD Test: Positioning of the beacons

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TSG 46 (area 463)

15 beacons in TSG 46 (area 463)

5 beacons in TSG 45 (offline)

CNRAD Test: Monitoring of the beacons

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CNRAD Test: Observed failuresTests started on 21/09/2012• On 26/09/2012 beacon nº 7 changed spontaneously to ID number 39• On 27/09/2012 signal from beacon nº 12 became unstable • On 4/10/2012 beacon nº2 disappeared• On 9/12/2012 a beacon with ID 2066 appeared (beacon nº2 / beacon in TSG 45?)• On 13-14/12/2012 beacons nº1, 6, 7, 8, 9, 10, 11, 13 and 14 disappeared• On 24/10/2012 beacons nº 566 and 42 appeared. The attenuation parameter of

both beacons changed of value• During week 46 beacon nº11 changed spontaneously to ID number 523• On 12/12/2012 beacon nº 20 changed spontaneously to ID number 23

Test finished on 17/12/2012- Total dose registered in TSG 46 (area 463): 40 Gy (20 years of LHC running)- Total dose registered in TSG 45 (area 453, off-line): 154 Gy

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CNRAD Test: Conclusions

Is beacon hardware reliable? - Only two beacons are truly dead: nº5 and nº13- 7 beacons (1, 2, 5, 11, 13, 19 and 20) worked after replacing their batteries by new ones

Conclusion: beacon hardware is reliable. But replacement of all beacons after 5 years should be planned to keep the system reliable!

Is beacon software reliable?- The main impact of ionizing radiation on - Other parameters may also change of value

Conclusion: beacon sofware is not reliable. SYSOCO is already working in the “hardening” of the software

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