Vibrating Wire Datalogger

Vibrating Wire Datalogger
+
  • Vibrating Wire Datalogger

MAS-VWLog-xx low-power multi-channel vibrating wire acquisition instrument is a kind of rock and soil in-situ monitoring instrument, which is suitable for frequency signal calculation and temperature acquisition of steel string sensor output. Can be used for dam, bridge, slope and other engineering stress, strain, deformation, seepage pressure and other physical monitoring and safety and stability analysis.

Overview


The instrument uses the latest 32-bit microprocessor with high efficiency FFT (Fast Fourier Transform) algorithm for steel string sensor output frequency signal to achieve accurate frequency calculation. The high degree of integration, the use of general standard RS485 interface and interface lightning protection design makes the acquisition instrument safe and stable operation in the harsh working conditions.

The controller sends a sweep excitation signal to excite the steel string oscillation, and the steel string oscillation generates an induced electromotive force. The signal is processed by the signal conditioning circuit, including signal filtering and amplification, and the amplified signal is collected.

 

Main functional characteristics:

●The equipment is small in size, light in weight, supports guide rails, buckles and other installation methods, and is convenient for wiring

● Support single pulse, multi-pulse, resonance method three excitation modes

● Low power design

● Device can diagnose sensor status

● Compatible with all single coil vibrating wire sensors, built-in constant current excitation circuit, and provide acquisition scheme for vibrating wire sensors with built-in thermistor temperature measurement method

● The acquisition accuracy is 0.05HZ, which can meet the long-term observation requirements of users for high-precision and high-stability projects.

 

Product application field

● Axial force monitoring for subway construction

● Building stress monitoring

● Strain monitoring of bridges and tunnels

● Ground water pressure monitoring of foundation pit

Specifications


Technical Specification Sheet

Model

MAS-VWLog-8-D

8-channel vibrating wire

MAS-VWLog-16-D

16-channel vibrating wire

Frequency reading

Measurement range

400Hz~3800Hz

Resolution

0.02Hz

Frequency accuracy

±0.05Hz

Time base accuracy

±30ppm

anti-interference ability

Strong (single-ended signal)

Motivation mode

Single pulse, multi-pulse (default), resonance method

Sensor status diagnosis

Sensor wiring short circuit, open circuit judgment

ADC sampling accuracy

12Bit

▼ Temperature reading

Sensor Type

Digital Temperature Sensor/Analog Temperature Sensor

Measurement range

-55℃ ~ 125 ℃/-20℃ ~ 150 ℃

Resolution

0.01 ℃

Temperature accuracy

±0.5℃/ 0.5%F▪S

▼ Storage

Flash

16MB

Data Capacity

About 500000 pieces of data

Communication

RS485 parameters

9600 band,8 bit,1 stop, no parity

USB2.0

Full speed -12Mbps

Physics

Operating temperature range

-40 ℃ ~ 85 ℃

Anti-surge

LPZ0B-3 (power supply, RS485 is secondary GDT MOV TVS; signal is primary TVS)

Power

DC12V/1A

Quiescent current

35mA @ 25 ℃

Weight

0.5KG

Interface form

Plug-in terminal

L×W×H

210 × 88 × 26mm

Related Information


Request for Quote