This document describes a measurement system for measuring stress distribution in concrete using ultrasound sensors. The system includes acoustic-elastic sensors that can be easily installed on structures by gluing. The sensors are connected to a transmitter unit that can measure temperature, sensor ID, and stress levels at a high rate. Data is output in real-time and can be connected to networks or cloud-based systems. The system is being used to monitor stress under bridge bearings for load distribution and structural health monitoring applications. Results show static load distributions mapped under various bearings.

1. Measurement of stress distribution in concrete
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easy – simply – good value

2. Measuring system for the stress measuring with
ultrasound in concrete
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Transmitter
Sensor
-Temperature measurement in the test object,
-Detection of the measuring point number (ID),
-Continuous measurement,
-High measuring rate for dynamic
measurements,
-Online data output (ASCII string), RS485,
-Connection to LAN, WLAN, Cloud.
waterproof connector
-A sensor cable: coaxial cable max. length 30 m,
-B sensor cable: RJ45 Cat 6 max. length about 3 m,
-C sensor housing carbon.

3. Application: bridge bearing sensor
Easy installation by gluing. Just a few minutes to assemble the acousto-elastic sensors
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4. Application: Measurement of the
distribution of static and dynymic load
5 acoustic-elastical sensors per bearing ready for potting
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5. Application: concrete stress under
bridge bearings-bridge monitoring
Faster installation in just a few hours
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6. Results of the measurement under the bearings
Static load distribution under the bearings
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BG80
TDC

7. New development transmitter
Transmitter with all options
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Technical specifications:
10,000 measurements / second (40,000 tested)
Avaraging time resolution: 1 ps (1000 records)
Avaraging stress resolution: 5 kpa (1000 records)
Maximal stress over 500 Mpa
Resolution of individual shock waves
Internal avaraging over 256 individual measurements
Data output approx. 40 data records / second
Temperature resolution 12 bit (0.0625 °C)
Operating voltage 5 V- 27 V DC
Power consumtion: 300 mA / at 10,000 measurements / second
Interfaces: RS485, LANm WLAN, Bluetooth, radio, USB, SPI
Measurement programm changes via bootloader possible

8. Virtual instrument and data usage
in the cloud
Data about WLAN / Bluetooth (30 m range).
Calculation in the terminal.
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Solution for inspection Solution for archiving and analysis.
Providing for different users.
For windows calculations with
DASYLab available
For Android or OIS, app must
be created
Data about WLAN / LAN with router in the cloud.
Calculation and storage in the cloud.

9. Aviability of sensors and transducer
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Sensors 8 – 10 weeks
100 pieces / week
Transmitter all options 10 weeks
D
Requests for applications, delivery times and prices to:
IBJ Technology
Colkwitzer Weg 7
04416 Markkleeberg
Germany
+49 341 3380172
info@ibj-technology.com
www,ibj-technology.com