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IMU Fiber Optic Gyroscope

Product Guide

IMU Fiber Optic Gyroscope (BGS-1, GCZ-1) can be used extensively for military purposes in navigation, north-seeking and attitude control systems. It can be also used for commercial purposes. Typical applications are found in aviation, aerospace, navigation, weapons, oil exploration, high-speed rail and many others. Prominent features of this product include low power consumption, small size, light weight, low cost, as well as high levels of reliability, detection sensitivity and resolution, etc.

Product Overview

Inertial Measurement Unit Fiber Optic Gyroscope (BGS-1, GCZ-1)

Components:
The fibre optic gyro is composed of fiber optic ring module, optical system module, information processing module, electrical connector, 3-axis accelerometer, etc.

Function:
It can detect the angular velocity signals and overload signals in the directions of X, Y and Z axles.

Basic Principle:
The fiber optic gyro is developed on the basis of the Sagnac effect. A beam of light is split and the two beams are made to follow the same path but in opposite directions. On return to the point of entry the two light beams are allowed to exit the ring and undergo interference. The relative phases of the two exiting beams, and thus the position of the interference fringes, are shifted according to the angular velocity of the apparatus.

A superluminescent diode (SLD) source produces light that is fed into one port of a coupler. Of the two outputs of the coupler, one provides the light to a Y branch waveguide. Upon the exit from the Y branch, each beam passes through a phase modulator that is necessary to create a nonreciprocal phase modulation. After the modulators, the two beams counter propagate through a fiber optic coil. The optical beams are then fed back through the Y branch and coupler and interfered on a detector. After the beam that has been interfered passes through the coupler, the optical signal will be converted into an electrical signal by the PIN detector. The signal is proportional to the angular velocity of the carrier, and the angular velocity signal of the carrier is calculated by the detection of the electric circuit. After the modulation of light by the Y waveguide modulator, the optical power that is received by the PIN detector will transform from cosine signal to sinusoidal signal with the changes in Sagnac phase difference. Consequently, the largest sensitivity is found near the zero input. The direction of the angular velocity can be input respectively.

IMU Fiber Optic Gyroscope

BGS-1 Sensor Box

1. Function: Sense the angular velocity signals and overload signals in the direction of X, Y and Z axles.
2. Structural Material: Outer shell, side cover, top cover and electrical connector. The main structure is made from aviation grade duralumin, which can ensure high hardness and light weight.
3. Warranty Period: 3 years
4. Working Conditions:
⑴ Ambient Temperature: -40℃~+60℃
⑵ Relative Humidity: at most 80%
⑶ Installation: horizontal
5. Technical Specifications:
⑴ Power Supply: DC15V
⑵ Operating Current: ≤400mA
⑶ Starting Time: ≤1s
⑷ Dynamic Range: ≥200°/s
⑸ Zero-Bias Stability: ≤0.01°/s
⑹ Zero-Bias Repeatability: ≤0.01°/s
⑺ Scale Factor: (20±10%)mV/°/s
⑻ 3-Axis Accelerometer Measurement Range: ±10g
⑼ 3-Axis Accelerometer Sensitivity: 400±20 mV/g
⑽ 3-Axis Accelerometer Temperature Drift: 50 ppm/℃
6. Overall Dimension: 110mm×68mm×60mm
7. Weight: ≤700g
8. Accessories: Unavailable

GCZ-1 Fiber Optic Inertial Measurement Unit

1. Function: Detect the angular velocity signals and overload signals in the direction of X, Y and Z axles.
2. Structural Material: Top cover, outer shell, side cover and electrical connector. The main structure is made from aviation grade duralumin which ensures superior hardness and light weight.
3. Warranty Period: 3 years
4. Working Conditions:
⑴ Ambient Temperature : -45℃~+60℃
⑵ Relative Humidity: at most 80%
⑶ Installation: horizontal
5. Technical Specifications:
⑴ Power Supply: DC±(5.1±0.1)V
⑵ Starting Time: ≤5s
⑶ Dynamic Range: ≥400°/s
⑷ Zero-Bias Stability: ≤0.5°/h
⑸ Zero-Bias Repeatability: ≤0.5°/h
⑹ Scale Factor: (2.9±0.5)×107bit/°
⑺ Scale Factor Repeatability: ≤200ppm
⑻ 3-Axis Accelerometer Measurement Range: ±25g
⑼ 3-Axis Accelerometer Sensitivity: 160±10 mV/g
6. Overall Dimension: 100mm×85mm×85mm
7. Weight: ≤960g
8. Accessories: Unavailable

Unique Selling Points

Sensor Box (BGS-1), Fiber Optic Inertial Measurement Unit (GCZ-1)
Designed exclusively for military uses in navigation, north-seeking and attitude control systems
We are the sole company in China to develop and produce single-mode fiber gyroscopes by collaborating with Zhejiang University.
Notable features include low power consumption, small size, light weight, low cost, good detection sensitivity, high resolution, etc.
High reliability with MTBF of more than 30000h
Solid-state inertial components with excellent mechanical adaptability
Strong adaptability to variable temperatures
Aviation grade duralumin structure ensures superior hardness and light weight.
Stable performance
High performance to price ratio
With a yearly production capacity of 1500 pieces, we can fully satisfy your batch buying requirements. This also provides a guarantee on reducing the transportation costs.
Other products are available as per customer requirements.

Frequently Asked Questions

1) Question: Production lead time?
Answer: 4 months.

2) Question: Product quality and warranty?
Answer: Products are produced according to our in-house technical specifications. Our fiber optic gyros are inspected according to the national military standard 2426A-2004. When the quality problem occurs in the warranty period, our customer has the right to request for return of goods. The loss will be borne by our company, as long as we confirm the documentary evidence which has been offered by our customer. We will charge you for the repair of your equipment which is returned to our factory outside the warranty period.

3) Question: Product packaging materials?
Answer: Cardboards and foam fillers.

4) Question: Main advantages of your equipment over other competitors?
Answer: Small size, light weight, low cost, high reliability, outstanding detection sensitivity, high resolution, exemplary service, fast response, etc.

5) Question: Which test method does your company adopt before the use of fiber optic gyroscopes?
Answer: Our fiber optic gyros are tested according to the national military standard 2426A-2004.

6) Question: Main uses of your fiber optic gyroscopes?
Answer: These gyroscopes are ideally suited for military uses in navigation, north-seeking and attitude control systems. They can also be used for civil aviation, oil exploration, high-speed rail and other civil applications. These products can measure the angular velocity of the carrier. They can also detect the angular velocity signals and overload signals.

Product Dimension Drawings and User Instructions (PDF Version)

  • BGS-1 Sensor Box Dimension Drawing
  • GCZ-1 Inertial Measurement Unit Dimension Drawing

BGS-1 Sensor Box User Guide
Interface definition is as follows. The output method can be customized according to users’ actual needs.

1) Interface Definition

Pin Signal Name I/O Signal Type Cross Linking Equipment
1, 2 Power supply Input +15 V Flight control and management computer
9, 10 GND Input Power ground
3 Heading angle rate gyro output- Output Differential signal-
4 Heading angle rate gyro output+ Output Differential signal+
5 Pitch angle rate gyro output- Output Differential signal-
6 Pitch angle rate gyro output+ Output Differential signal+
7 Roll angle rate gyro output- Output Differential signal-
8 Roll angle rate gyro output+ Output Differential signal+
11 X-axis acceleration signal+ Output 0.5 V~4.5 V
12 Y-axis acceleration signal+ Output 0.5 V~4.5 V
13 Z-axis acceleration signal+ Output 0.5 V~4.5 V
14~21 - - -
Note: The unspecified pin signal represents the unavailable signal.

2) Output Signal
Analog voltage signal

GCZ-1 Fiber Optic Inertial Measurement Unit User Guide
Interface definition is as follows. The output method can be customized according to users’ actual needs.

1) Interface Definition
The electrical connector works with JK30-15ZK jack. The definition of the jack function can be seen in Table 1.

Table 1: J30-15ZK Jack Function Definition

No. Electrical Characteristics No. Electrical Characteristics
1, 2, 9, 10 + 5V 5 T+
7, 8, 15 - 5V 6 T-
11, 12, 13, 14 Ground 3 Synchronizing signal+
4 Synchronizing signal-

2) Output Signal
RS422 digital signal output

Product Catalogue

No. Product Name Model
1. Sensor Box BGS-1
2. Fiber Optic Inertial Measurement Unit GCZ-1
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