Research on vehicle speed detection technology based on micro-magnetoresistive sensing equipment

Abstract

In order to effectively detect road traffic to achieve intelligent road traffic management, the vehicle speed detection algorithm based on micro-magnetoresistive sensing equipment was studied. A new pairwise differential eigenvalue vehicle speed calculation algorithm was proposed to solve the problem that selecting one eigenvalue on the magnetoresistive curve may be influenced by the actual condition that the data curves of the two sensors and the relative base voltage cannot be exactly the same. The results of the application on a certain expressway indicate that speed detection accuracy can be 95.4%, besides, both the integrity and the validity of the data can meet the requirements.

Keywords

• Road engineering;
• Vehicle speed detection;
• Pairwise differential eigenvalues;
• Micro-magnetoresistive sensor