GB/T 38348-2019 in English

Background of Standard Formulation and Analysis of Technology Evolution

Multipole Magnetic Rubber Encoders are key components in the automotive braking system, and their performance directly affects the vehicle's handling safety and reliability. The formulation of GB/T 38348—2019 aims to unify industry technical requirements, standardize production and testing processes, and ensure product quality consistency.

As the automotive industry develops towards intelligence and electrification, higher requirements are placed on the performance of encoders, including more accurate position detection, stronger environmental resistance, and more stable long-term reliability. This standard was drafted on the basis of GB/T 1.1—2009, combining relevant domestic and foreign technical achievements and fully considering actual application needs.

Classification and marking of multi-pole magnetic rubber encoders

Analysis of structure and technical requirements

Multi-pole magnetic rubber encoder consists of magnetic rubber and a metal frame. Its core is to use the Hall effect to achieve position detection. The standard has strict requirements for the following key performance indicators:

Test methods and inspection rules

The standard specifies comprehensive test methods, covering all aspects from raw materials to finished products:

• Magnetic rubber physical properties: including hardness, tensile strength, tear strength, etc.
• Metal skeleton performance: GB/T 3280, GB/T 5213 or GB/T 13237 standards are used for testing.
• Rubber encoder comprehensive performance: including single pole deviation, cumulative deviation, duty cycle and magnetic induction intensity.

Implementation suggestions

To ensure the effective implementation of the standard, it is recommended that manufacturers:

1. Establish a complete quality management system and strictly purchase raw materials and control the production process in accordance with the standard.
2. Equipped with advanced testing equipment, such as Hall effect testers, high-temperature aging chambers, etc.
3. Strengthen employee training, especially the understanding of test methods and judgment rules.
4. Perform type inspection and periodic verification regularly to ensure stable product performance.