Model XB1100 High Accury Single-axis Fiber Optic Gyroscope With
0.01 °/hr Bias Drift
1. Product introduction
1.1 Working Principle and Function
This product is an inertial angular rate sensor based on the
principle of Sagnac effect, which is used to measure the angular
rate movement of the carrier around the sensitive axis of this
sensor. This unit takes the fiber optic coil as the angular rate
sensitive unit and the closed-loop detection circuit as the basis.
Two beams from a laser are injected into the same fibre but in
opposite directions. Due to the Sagnac effect, the beam travelling
against the rotation experiences a slightly shorter path delay than
the other beam. The resulting differential phase shift is measured
through interferometry, thus translating one component of the
angular velocity into a shift of the interference pattern which is
measured photometrically.
Beam splitting optics launches light from a laser diode into two
waves propagating in the clockwise and anticlockwise directions
through a coil consisting of many turns of optical fibre. The
strength of the Sagnac effect is dependent on the effective area of
the closed optical path: this is not simply the geometric area of
the loop but is enhanced by the number of turns in the coil.
This product is an inertial sensor composed of optical system,
corresponding power supply and data processing circuit. It can
provide three-axis angle increment information.
1.2 Configuration
The product is mainly composed of the following components:
a) Optical part: light source, coupler, Y modulator, fiber coil,
detector;
b) Circuit part: processor board, light source board and
preamplifier;
c) Structural part: body, cover, etc.
1.3 Shape and installation size:
Overall dimensions (70 ± 0.1)mm × (70±0.1) mm × (32±0.5)mm,
Installation dimensions (58 ± 0.1) mm×(58±0.1) mm,
1.4 Performance parameters
| The parameter name | Index requirements | Note |
Warm up time (min) | ≤5 | |
Range of measured angular rate (º/s) | ≥±400 | |
Absolute value of zero deviation (º/h) | ≤1 | Remove the earth's rotational speed component |
Bias Drift at fixed temperature (º/h,100s,1σ) | ≤0.01 | Point temperature |
Bias Drift at full temperature
range from -40° C till 60° C (º/h,100s,1σ) | ≤0.02 | -40℃～+60℃, Warming rate≤0.5℃/min |
Bias Drift Repeatability at
full temperature range from
-40°C till 60° C (º/h,1σ) | ≤0.01 | Point temperature |
Zero bias sensitivity (º/h/Gs) | ≤0.02 | |
Random walk (º/h1/2) | ≤0.003 | |
Scale coefficient nonlinearity (ppm) | ≤10 | Point temperature |
The scale coefficients are not symmetrical (ppm) | ≤10 | Point temperature |
Calibration coefficient room temperature repeatability (ppm,1σ) | ≤10 | Point temperature |
Calibration coefficient total temperature repeatability (ppm) | ≤50 | After the compensation |
The threshold value (º/h) | ≤0.02 | |
Resolution (º/h) | ≤0.01 | |
Bandwidth (Hz) | ≥200 | |
Random vibration (º/h) | ≤0.05 | Zero deviation from the mean value before and after vibration |
Impact (º/h) | ≤0.05 | Zero deviation before and after impact |
1.5 Mechanical and electrical interface
1.5.1 Mechanical interface
The mounting surface of the product constitutes the fixed surface
for external installation, and the mounting screw is M4.
1.5.2 Power requirements
The external power supply to the product has two channels.
| ＋5V | －5V |
| Voltage | 4.75V~5.25V | －4.75V~5.25V |
| Ripple | 20mV | 20mV |
| Current | 1.5A | 0.6A |
1.5.3 Electrical interface
XB1100 USES J30JZ/XN9TJCAL01 socket as output socket
| Pin number | Signal | The length of lead(mm) | Physical meaning |
| 4 | T＋ | 250 | RS422 send ＋ |
| 8 | T－ | 248 | RS422 send － |
| 9 | R－ | 246 | 400Hz square wave synchronous signal low end 0V |
| 5 | R＋ | 244 | 00Hz square wave synchronous signal high enf 3.3V |
| 2 | －5V | 242 | The main control board －5V,The light source constant current －5V |
| 6 | GND | 240 | ＋5V(Ground wire),－5V(Ground wire) |
| 1 | ＋5V | 238 | The main control board ＋5V |
| 3 | ＋5VG | 234 | The light source control ＋5V Power supply |
| 7 | GNDG | 230 | The light source control ＋5V(Ground wire) |
