ISO 20912:2020

Overview

ISO 20912:2020 - Conformance test methods for RFID enabled tyres - specifies standardized methods to validate that a standalone RFID enabled tyre meets the minimum reading distance requirements defined in ISO 20909. The document describes two comparable measurement methodologies (when using the same radio frequency and power parameters): an open space method and a semi‑anechoic method tailored to UHF frequencies. Tests apply to unmounted tyres and are not intended as mass‑production quality control or to prescribe test frequency.

Key topics and technical requirements

• Scope and test object: Tests are applied exclusively to a standalone (non‑mounted) RFID enabled tyre featuring embedded, patch or sticker tag solutions.
• Test methods: Two methods are provided:
  • Open space method - simple field setup (can use a hand‑held reader) with prescribed clearances to minimize reflections and interference.
  • Semi‑anechoic method - controlled chamber measurements tailored for UHF (860–930 MHz) to improve repeatability.
• Testing layout and clearances:
  • Reader-to‑tag distance typically set at least 2× the minimum reading distance from ISO 20909.
  • Vertical clearance (h) between tag and ground/ceiling: at least 1.5 m or 5× the minimum reading distance, whichever is lower.
• Equipment and protocols: Readers must support EPC Class 1 Gen2 or ISO/IEC 18000‑63. Measurement metrics include RSSI (received signal strength indicator), RPS (reads per second), turn‑on power, and EIRP (effective isotropic radiated power).
• Test execution: Commands are sent to read the tyre UII (e.g., SGTIN96) without CRC errors. For frequency‑hopping environments, interrogation intervals of at least 3 s are recommended for averaging.
• Conformance: Results are reported as pass/fail against the ISO 20909 minimum reading distance; Annexes provide a sample conformance test report and radiated power guidance.

Applications and who uses it

• Tyre manufacturers assessing RFID tag attachment options and verifying minimum read performance during product development.
• Independent testing laboratories performing repeatable conformity checks for product certification or comparative analysis.
• OEMs, fleet operators and supply‑chain managers requiring objective read‑range verification for inventory, logistics and lifecycle traceability.
• Regulatory/certification bodies that need standardized test protocols to ensure interoperability in UHF RFID tyre tagging.

Related standards (useful cross‑references)

• ISO 20909 - minimum reading distance for RFID tyre tags (primary conformance target).
• ISO 20911 - guidance on tag attachment solutions for tyres.
• ISO/IEC 18000‑63 and EPC Class 1 Gen2 - RFID air interface protocols referenced for reader/tag communication.

Keywords: ISO 20912, RFID enabled tyres, conformance test methods, ISO 20909, UHF RFID, minimum reading distance, open space method, semi‑anechoic method, RFID tyre testing, RSSI, EIRP.