---
title: "High-Precision Magnetic Anomaly Detection System based on WIZnet W5500"
url: "https://maker.wiznet.io/Grace_Koo/projects/high-precision-magnetic-anomaly-detection-system-based-on-wiznet-w5500/"
markdown_url: "https://maker.wiznet.io/Grace_Koo/projects/high-precision-magnetic-anomaly-detection-system-based-on-wiznet-w5500/md"
type: "UCC: User Created Content"
author: "Harbin Engineering University"
author_url: "https://patents.google.com/patent/CN121254371A/en?q=%28w5500%29&oq=w5500&sort=new"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "Harbin Engineering University"
original_url: "https://patents.google.com/patent/CN121254371A/en?q=%28w5500%29&oq=w5500&sort=new"
published: "2026-01-16"
language: "en"
tags: ["C/C++", "Sensors"]
hardware: ["WIZnet W5500"]
likes: 0
views: 811
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# High-Precision Magnetic Anomaly Detection System based on WIZnet W5500

> A real-time precision measurement system for defense and exploration, powered efficiently by STM32 and W5500. (Patent : CN121254371A)

Original author: Harbin Engineering University (source: https://patents.google.com/patent/CN121254371A/en?q=%28w5500%29&oq=w5500&sort=new)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Documents and links

- [CN121254371A](https://patents.google.com/patent/CN121254371A/en) (code)

## Article

*The cover image of this article was generated by Gemini.*

## 1. Key Insights: Why W5500?

Q. Why choose an MCU and W5500 over a high-end processor?

1ns Precision Synchronization: To prevent MCU overload issues that occur with software stacks, ensuring precise timing.

Role of W5500: The Hardwired TCP/IP Stack offloads network processing, allowing the MCU to focus 100% on sensor control.

Q. What actual performance was achieved with the W5500?

Ultra-Low Latency: Achieved end-to-end latency of < 400µs (Immediate detection of rapid signal changes).

Stable Throughput: Maintained 25Mbps throughput across the industrial temperature range (-40℃ to 85℃).

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## 2. Hardware Specifications

To ensure stability, Data Processing (MCU) and Network Transmission (W5500) are physically separated.

| **Category** | **Model** | **Key Role** | **Notes** |
| --- | --- | --- | --- |
| MCU | STM32F407VET6 | Data acquisition control, Signal filtering, Algorithm | Main Controller |
| Ethernet | WIZnet W5500 | TCP/IP Offload, High-speed Real-time Transmission | SPI Interface |
| Sensor | TMR8625 (x8) | 3-Axis micro-magnetic field detection (24 channels) | High-Sensitivity |
| ADC | ADS131M08 (x3) | 24-bit high-resolution conversion (Global sync applied) | Precision ADC |

---

## 3. System Logic & Data Flow

"MCU focuses on sensors, W5500 handles complex communication"

![](https://maker.wiznet.io/upload/ckeditor5/210237215%5F1768561236%2Epng)

*Image generated by Gemini.*

Acquisition: 24-channel sensor data is collected simultaneously within 1ns error using a global clock.

Processing: STM32 performs signal filtering and data encapsulation only.

Transmission: The W5500 receives packets and immediately transmits them to the PC via the hardware stack.

---

## 4. Technical Details for High Precision

Sophisticated system design supports the performance of the W5500.

- Smart Operation Mode

Normal: Activates only 4 sensors to save power.

Event Detected: Immediately switches to Full Array (24 sensors) and W5500 High-Speed Mode for precision data transmission.

- Noise Isolation Design

Physically separated Analog (Sensor) and Digital (W5500/MCU) grounds (GND).

Connected via high-quality Ferrite Beads to prevent communication noise from affecting the sensors.

---

## 5. Applications

This system is applied in rigorous industrial environments beyond the laboratory.

🌍 Geophysical Exploration: Precise analysis of underground mineral resources and geological structures.

🛡️ Defense & Security: Covert movement detection of metallic objects (e.g., submarines, vehicles).

🌊 Harsh Environment Monitoring: Unmanned monitoring in inaccessible areas like underwater or outdoor environments.

---

### 💡 Conclusion

"This project proves that W5500's Hardwired TCP/IP technology plays a critical role not only in simple IoT devices but also in high-precision scientific instruments requiring nanosecond-level synchronization."

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Source: https://maker.wiznet.io/Grace_Koo/projects/high-precision-magnetic-anomaly-detection-system-based-on-wiznet-w5500/