RFID diagnosis technology for concrete structures

RFID Strain Measuring System

＞Overview ＞Specifications ＞Application
 Examples ＞Download
 Pamphlet

Deterioration in concrete structures causes strain in various locations. Conventional strain measurement is performed by connecting wired strain gauges or rebar stress transducers to data loggers. However, this approach has several problems. Deterioration to cables which extend outside the structure frame make it difficult to perform long-term measurement, and these cables mar the aesthetics of the structure.
In the RFID strain sensing system, the data communication equipment (RFID tags) and sensors are embedded in the structure. Electromagnetic waves are provided to the RFID tags from the surface of the structure, driving the sensors to measure strain.
Measurement can be performed easily by anyone with a computer and a special reader/writer. The system also has no exposed cables, etc. on the surface of the concrete structure.

Align the sensor along the length of the rebar (primarily main reinforcement), and fix it with cable ties.
Install the RFID tag at the intersection of multiple rebar, 5cm or less from the surface of the concrete.
Cast the concrete. When the mold is removed, there will be no exposed cable.

Search for the RFID tag.
Press the search button on the reader/writer application, and move the antenna near where the embedded tag is located.
A notification sound will be played when the antenna passes over the tag, and the tag's unique number (ID) will be displayed.
All you have to do to perform measurement is press the measure button to acquire strain data from the sensor.
When past measurement history data, calibration factors, or other data are also stored on the tag, they will also be read in.
Data can be stored in internal memory.