Suzhou Mianrui Electronic Technology Co., Ltd. specializes in the R&D, application and production of Electromagnetic Micro-Acoustic (EMMA) identification technology and metallurgical intelligent systems. We are one of the few enterprises with the complete R&D chain of device simulation design, process manufacturing, reader manufacturing and antenna design.
Our technology originates from the Surface Acoustic Wave (SAW) research group of Shanghai Jiao Tong University. Core team members come from SJTU, KIT Germany, the University of Freiburg and Chiba University Japan, with over 20 years of research and more than 10 national and provincial projects. The high-temperature SAW chip has been developed over 16 years and applied in production for 8 years, deployed in 43 steel plants.
With fully independent core technologies and intellectual property, Mianrui holds 15 granted invention patents and has won awards such as the Jinji Lake Dual-Hundred Talent Program and Technology Leading Talent. We serve 50+ metallurgical enterprises including Baowu, Yonggang, Zhanjiang Steel, Longmen Steel and Xingcheng Special Steel.
Perceive every degree of heat across the full process
EMMA-ID recognition, long-term stable at 350℃, accuracy 99.9%+

Converter & LF refining AI model suite, saving about 4.37 CNY per ton of steel

Full-life digital control of copper slag cooling yards, eliminating ladle "explosion" risks

Short-pulse radar positioning with 8cm accuracy, full-process material tracking

EMMA-ID Series · High-temperature Container Sensing & Positioning
Proven across leading steel plants and non-ferrous smelters

One-click steelmaking · 39 ladles stable for 7 years

Smart dispatch · semi-autonomous scheduling

Ladle smart control · 8cm crane positioning
Hot metal tracking & dispatch

Copper slag dispatch · digital cooling yard

Copper slag smart management deployed
A "second brain" for steel plants - perceptible, simulatable, collaborative, evolvable.










Trusted by 50+ metallurgical enterprises since 2018
Two decades of SAW research, from laboratory to 43 steel plants
SJTU initiates Surface Acoustic Wave (SAW) research
Team supported by 3 NSFC grants for SAW theory, piezoelectric materials and EDA simulation
First SAW RFID trial in Baosteel "one-click steelmaking"; 39 ladles installed by 2019
EMMA-ID officially released and promoted, covering 43 steel plants
Expanding into non-ferrous copper and rail transit, deployed at Yunnan Copper and Jiangxi Copper
Witness breakthroughs, follow industry trends

From SAW principles to physical anti-collision coding — the three pillars behind reliable EMMA-ID recognition