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Equipment

Table of Contents

1 Sensors

1.3 Force Sensors

1.4 Strain Gauge

1.5 Interferometers

1.5.1 Suppliers

2 Actuators

3 Measurement System / Acquisition System

4 Control System

Dspace, Speedgoat

5 Positioning Stages

6 Amplifiers

6.1 Current Amplifiers

6.2 Voltage Amplifiers

7 ESRF Equipment

7.1 Geophones

7.1.1 L-28LB

L28LB.png

Figure 1: Picture of the L-28LB Geophone

Table 1: L-28LB Parameters
Natural Frequency [Hz] 4.5
Weight [g] 140
Sensitivity [V/(m/s)] 31.3

We define the parameters of the geophone and we plot its bode plot (figure 2).

w0 = 4.5*2*pi; % [rad/s]
ksi = 0.38;
G0 = 31.3; % [V/(m/s)]
G = G0*(s/w0)^2/((s/w0)^2 + 2*ksi*(s/w0) + 1);

L28LB_bode_plot.png

Figure 2: Bode plot of the L-28LB Geophone

7.1.2 L-4C

L4C.png

Figure 3: Picture of the L-4C Geophone

Table 2: L4C Parameters
Natural Frequency [Hz] 1
Weight [g] 2150
Sensitivity [V/(m/s)] 276.8

The transfer function from the velocity and the measured voltage is defined below.

Its bode plot is shown on figure 4.

w0 = 2*pi; % [rad/s]
ksi = 0.28;
G0 = 276.8; % [V/(m/s)]
G = G0*(s/w0)^2/((s/w0)^2 + 2*ksi*(s/w0) + 1);

L4C_bode_plot.png

Figure 4: Bode plot of the L4C Geophone

7.2 Accelerometers

7.2.1 Pieozoelectric acc. 356b18 - 3 axis

356b18.jpg

Figure 5: Pieozoelectric acc. 356b18 - 3 axis

Table 3: 356b18 Parameters
Sensitivity 0.102 \(V/(m/s^2)\)
Measurement Range 4.9 \(m/s^2\) pk
Frequency Range 0.5 to 3000 Hz
resonant frequency > 20000 hz
broadband resolution 0.0005 \(m/s^2\) rms

7.2.2 Ceramic acc. 393B05 - 1 axis

393b05.jpg

Figure 6: Ceramic acc. 393B05 - 1 axis

Table 4: 393B05 Parameters
Sensitivity (±10 %) 1.02 \(V/(m/s^2)\)
Measurement Range 4.9 \(m/s^2\) pk
Frequency Range (±5 %) 0.7 to 450 Hz
resonant frequency > 2500 hz
broadband resolution 0.00004 \(m/s^2\) rms

Author: Dehaeze Thomas

Created: 2019-07-05 ven. 11:41

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