Digital static and dynamic strain data acquisition instrument

1.Overview

　　WS-3811Digital static and dynamic strain data acquisition instrumentAdopting new digital technology, it has the characteristics of small size, high integration, strain amplification and filtering full process control. It can directly convert strain variables into digital quantities and transmit data to the computer through USB interface or network interface (TCP/IP protocol), overcoming the shortcomings of conventional strain gauges that can only output analog quantities (requiring additional acquisition instruments), and facilitating laboratory and field testing work.

2.characteristic

1)Full process control (programmable range, programmable filtering, DA automatic balancing, automatic calibration), without any adjustment buttons on the panel;

2)Optional computer interface

① USB computer interface, directly connected to the computer (no need for additional data acquisition), program strain measurement, oscilloscope, continuous static and dynamic strain recording;

② Network interface, using TCP/IP protocol, multiple strain gauges can form a distributed network structure, with network cables up to 100 meters and optical fibers up to several kilometers, suitable for long-distance strain measurement;

3)Operating environment:Microsoft WindowsXPTheVistaTheWin7TheWin8；

4)Static and dynamic strain measurement, voltage measurement;

5)Measurement range: Strain (maximum ± 50000)me）；

6)The chassis is sturdy, small in size, lightweight, and convenient for field testing;

7)A single strain gauge can integrate 16 channels and can be networked with multiple units;

8)When the testing site is far away from the instrument, an external bridge box can be used for measurement;

3.(Network interface strain gaugeSchematic diagram of distributed system composition

4.Main functions and technical indicators

1)Measurement methods: static strain measurement, dynamic strain measurement, voltage measurement;

2)Number of channels per instrument: 2, 4, 6, 8, 10, 12, 14, 16 channels;

3)Computer interface: USB or network interface 10/100BaseT

4)Supply bridge voltage:

① Programmable bridge voltage: Switching between 2V, 5V, 10V, and 15V in stages;

② Maximum output current of power bridge voltage: 50mA; (can be increased with special requirements)；

5)Range and sensitivity:

① Programmable range: 1st gear ± 5000me2nd gear ± 50000me(Under 2V bridge pressure);

② Output sensitivity: 1st gear ± 1000me/V2nd gear ± 10000me/V(Under 2V bridge pressure);

6)Bridge balance:

① Balance method: programmable DA automatic balance;

② DA accuracy: 16 bits;

③ Balance range: Balance range: 2 times the range;

7)Amplifier input characteristics:

① Input method: Double ended differential input;

② Input impedance: 1010 Ω;

③ Common mode rejection ratio (CMRR): not less than 110dB;

④ Input protection: When the input voltage exceeds ± 10V, the amplifier implements full protection;

8)wave filter:

① Filtering method: programmable filtering;

② Programmable low-pass filter frequency: 2Hz~50kHz(arbitrarily set)

③ Filter flatness: When f<0.5fo, the frequency band fluctuation is less than 0.1dB;

④ Filter stopband attenuation: -80dB/Oct;

9)Band width: DC~50kHz(Maximum bandwidth range);

10)noise

① Dynamic strain measurement noise ≤ 5mVrms；（Input short circuit, Converted to input at maximum gain and maximum bandwidth）；

② Static strain measurement noise ≤ 1mVrms；（Input short circuit, Converted to input at maximum gain and maximum bandwidth）；

11)Strain Bridge (Standard)

① Bridge resistance: 120 Ω

② Strain gauge: 120 Ω

③ Strain gauge sensitivity coefficient K=2 (customizable);

④ Standard configuration bridge box wire length: 2 meters;

⑤ Applicable resistance strain gauge resistance: 50 Ω~10000Ω (customized);

12)Working temperature: -10 ℃~50℃；

13)Working humidity: ≤ 85% RH (non condensing)

14)Size and Weight: Width 370 x Height 165 x Depth 365, 8.2 kg (16 lanes)

15)Supply voltage: 220VAC

5.Order model

6.Accessories selection