Model F3X98HB High Accury Single-axis Fiber Optic Gyroscope With
0.01 °/hr Bias Drift
1.Product Introduction
1.1 Working Principle, Function and Application Scope of Products
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 one power supply box and three
sensitive element(fiber coils).
1.3 Shape and installation dimensions
Power box :(110 ± 0.1)mm × (98.5 ± 0.1) mm × (29. 5 ± 0.5) mm
Installation of Power Box :(103 ± 0.1 mm) × (50±0.1mm)
Fig 1. Power Box
Sensitive element dimension: (Ф98 ± 0.1) mm × (25 ± 0.5) mm
Sensitive element installation dimension:(37.5 ±0.1 mm) × (37.5
±0.1mm)
Fig 2. Sensitive Element
1.4 Weight
≤1550g
1.5 Performance parameter
| Item | Index | Remarks |
Range
(°/s) | ±300 | |
Scale factor
(LSB/°/s) | 4000000×(1±10%) | |
Scale Factor Non-linearity at fixed temp
(ppm) | ≤30 | |
Scale factor asymmetry at fixed temp
(ppm) | ≤10 | |
Scale factor repeatability at fixed temp
(ppm) | ≤10 | |
Scale factor repeatability at full temp
(ppm) | ≤30 | |
Bias Drift at fixed temp
(100s,1σ,°/h) | ≤0.01 | |
Bias Repeatability at fixed temp
(1σ,°/h) | ≤0.007 | |
Bias Repeatability at full temp
(1σ,°/h) | ≤0.020 | |
Bias Drift at changing temp
(100s,1σ,°/h) | ≤0.050 | Off line compensation |
Start-up time
(s) | 0 | |
1.6 Mechanical and electrical interfaces
1.6.1 Mechanical interface
Four M3 screws are used for power box installation and 12 M4 screws
for sensitive element
1.6.2 Power Supply and Power Consumption
| Voltage | Current | Ripple |
| +5V | ＞2A | ≤20mV |
| -5V | ＞2A | ≤20mV |
Nominal power consumption: room temperature < 8W, full
temperature < 12W .
1.6.3 Electrical Connection Interface
Definition for Model J30J-31ZK plug-in connector
| J30J-31ZK socket pin number | Definition |
| 1,17 | +5V |
| 2,18 | GND |
| 3,19 | -5V |
| 12,28 | R+ |
| 13,29 | R- |
| 14,30 | T+ |
| 15,31 | T- |
| 4,5,6,7,8,9,10,11,16,20,21,22,23,24,25,26,27 | NC |
