Wheel Speed Sensor Interface Circuit With Dual-Path Signal Verification

Solution Overview

Problem

Existing wheel speed sensor interface circuits lack reliability and redundancy in transmitting wheel speed information, and current solutions are costly due to the inclusion of unnecessary components.

Innovation Solution

A wheel speed sensor interface circuit that compares voltage signals from both the high and low sides of the wheel speed sensor to verify normal operation, potentially omitting components connected to the low side to reduce costs while maintaining reliability and redundancy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dual-path signal processing with both high side and low side components is implemented, then reliability and redundancy are improved, but device complexity and cost increase

Engineering Contradiction:

Improvereliability and redundancy of wheel speed information transmissionVSAvoidcomplexity of wheel speed sensor interface circuit

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The circuit is divided into two independent signal processing paths: a first signal processing path that processes a first current signal to generate a first voltage signal, and a second signal processing path that processes a second current signal to generate a second voltage signal. Each path operates independently but processes signals from the same wheel speed sensor, providing redundancy while maintaining manageable complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Both the first signal processing path and the second signal processing path perform identical functions - they each receive current signals, process them through the same processing steps, and output voltage signals. This universal design allows the system to achieve reliability through redundancy while using standardized components and processing logic, reducing overall system complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If dual-path signal processing with both high side and low side components is implemented, then reliability and redundancy are improved, but manufacturing cost increases

Engineering Contradiction:

Improvereliability and redundancy of wheel speed information transmissionVSAvoidmanufacturing cost of wheel speed sensor interface circuit

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The circuit is divided into two independent signal processing paths: a first signal processing path that processes a first current signal to generate a first voltage signal, and a second signal processing path that processes a second current signal to generate a second voltage signal. Each path operates independently but processes signals from the same wheel speed sensor, providing redundancy while maintaining manageable complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Both the first signal processing path and the second signal processing path perform identical functions - they each receive current signals, process them through the same processing steps, and output voltage signals. This universal design allows the system to achieve reliability through redundancy while using standardized components and processing logic, reducing overall system complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12024149B2Wheel speed sensor interface circuit, operation method thereof, and electronic control system

Publication Date: 2024.07.02 HL MANDO CORP

AI summary

The present disclosure provides a wheel speed sensor interface circuit, an operation method thereof, and an electronic control system, the wheel speed sensor interface circuit comprising: a first signal processing unit for receiving a first current signal sensed by a high side of a wheel speed sensor and processing the first current signal to output a first voltage signal; a second signal processing unit for receiving a second current signal sensed by a low side of the wheel speed sensor and processing the second current signal to output a second voltage signal; and a verification unit for comparing the first voltage signal and the second voltage signal with each other and verifying whether the first voltage signal and the second voltage signal are normal. According to the present disclosure, reliability and redundancy for a process of transmitting wheel speed information can be secured.