Crack Monitoring
Solutions
Options for Linear Displacement & Vibrating Wire Sensors
Options for Linear Displacement & Vibrating Wire Sensors
Geotechnical
Instrumentation
VW-
Crack / Joint Meter
Laptop / PC
Computer
Computer
Adding new sensors to
a network is
simplified as no new calibration factors have to added to or changed
inside the software.
Q-Log
Application
Crack Monitoring &
Recording Solutions
The diagram below demonstrates how a simple PC based crack monitoring system can be put together using the different interfaces available from Keynes Controls.
For applications requiring only a few inputs then the single channel NP-Crack-v1
cards are used This
interface can be used on many different manufactures potentiometric
displacement/crack meters and provides the excitation and temperature
sensor inputs.
In applications where there are a number of sensors grouped together then the AquaDAT sensor interface offers the best option. This sensor interface can drive up to a maximum of 16 crack meters from a single device.
For long term remote applications where the sensors are to be used outside for long periods of time, the Vibrating Wire crack meters offer the best solution. The VibWire-108-SDI12
series of instruments support most manufactures ranges of VW crack
meter and interface directly to the local network.
The diagram below demonstrates how a simple PC based crack monitoring system can be put together using the different interfaces available from Keynes Controls.
For applications requiring only a few inputs then the single channel NP-
In applications where there are a number of sensors grouped together then the AquaDAT sensor interface offers the best option. This sensor interface can drive up to a maximum of 16 crack meters from a single device.
For long term remote applications where the sensors are to be used outside for long periods of time, the Vibrating Wire crack meters offer the best solution. The VibWire-
Part No. NP-Crack-v1
Single Channel
Model: VibWire-108-SDI12
Vibrating Wire Sensor
Interface
Sensor Excitation
3.3 V
ADC Resolution
16 Bit
Standard Input Range
+/-
5V
Potentiometer
Resistance
120 -
1 K Ohm
Engineering Units
Displacement mm, m,
cm, inches,
Deg C
User Defined
User Defined
Operating Temp
-
20 to + 60 Deg C
Power Supply
12V DC @ 1 mA
Acquisition
Acquisition
Single Channel
Digital Crack Meter
Interface
The image below shows a single channel NP-Crack-v1 interface used to acquire and send
displacement values from a potentiometric displacement sensor to a SDI-12
digital network data logger.
The NP-Crack-v1
is fully User programmable and can
be used to send raw or displacement and temperature values in
engineering units to a logger.
The image below shows a single channel NP-
The NP-
The NP-Strain-V1
is only powered on during a data
acquisition operation and so is ideal for deployment for remote field
applications where power requirements are to be kept to a minimum.
An IP 65 cable gland sealed enclosure ensures the interface can be deployed close to the displacement sensor in most locations
An IP 65 cable gland sealed enclosure ensures the interface can be deployed close to the displacement sensor in most locations
Part No. NP-
This part can be supplied with a customised input range at the time of manufacture.