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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...

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Related Experiment Video

Updated: May 28, 2026

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Multi-Target Radar Speed Meter Failure Mechanism Research.

Lei Luo1,2,3, Xin Jiang1,2,3, Jianwen Shao1,2,3

  • 1Zhejiang Institute of Quality Sciences, Hangzhou 310018, China.

Sensors (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

Accelerated life testing revealed that multi-target radar speed instruments fail under combined high temperature and humidity. The microwave signal receiving chip malfunctioned due to factors like soldering materials and process, impacting traffic safety instrument reliability.

Keywords:
accelerated life testfailure analysismulti-target radar speed measurement instrumentsreliability

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Area of Science:

  • Metrology and Instrumentation
  • Reliability Engineering
  • Traffic Safety Technology

Background:

  • Multi-target radar speed measuring instruments are vital for traffic safety and efficiency.
  • Ensuring the long-term stability of these instruments under demanding conditions is crucial.

Purpose of the Study:

  • To verify the stability of multi-target radar speed instruments under accelerated life testing.
  • To investigate the failure mechanisms of these instruments in complex working environments.

Main Methods:

  • Accelerated life testing was performed on five speed measuring specimens.
  • Optical and scanning electron microscopy were used to analyze failure mechanisms.
  • Testing involved a temperature of 85 °C and 79% relative humidity (RH).

Main Results:

  • All five specimens failed after 55 days of testing under 85 °C and 79% RH.
  • The primary failure cause was the microwave signal receiving chip malfunction.
  • Chip failure modes were linked to structural, design, soldering material, and process issues.

Conclusions:

  • High temperature and humidity significantly impact the reliability of radar speed instruments.
  • The microwave signal receiving chip is a critical component susceptible to environmental stressors.
  • Findings offer insights for improving the reliability of metrological instruments.