Fiber Optic Gyro for Automotive Safety Systems

• Type: Servo
• Output Signal Type: Digital Output
• Measuring Shaft Quantities: Single
• Accuracy Grade: 0.02deg/H
• IP Rating: IP67
• Certification: CE
• Model NO.: F98
• Customized: Customized
• Start Time: <3 Min
• Zero Bias Stability: <0.02deg/H
• Zero-Bias Repeatability: <0.02deg/H
• Random Walk Coefficient: <0.001deg/H1/2
• Scale Factor Nonlinearity: <20ppm
• Scale Factor Repeatability: <20ppm
• Supply Voltage: 5V
• Dynamic Range: 300deg/S
• Transport Package: Sponge and Box
• Specification: 98 X 98 X 35cm
• HS Code: 9031809090
• Production Capacity: 500/Month

Product Description

Fiber optic gyro for automotive safety systems
Overview
This document specifies the requirements and methods for use and maintenance of F98B fiber optic gyroscope (product for short).

1. Product introduction
   1. Working principle, function and scope of application of the product
      1. How it works

This product is an inertial angular rate sensor based on the optical Sagnac effect, which is used to measure the angular rate of the carrier along the sensitive axis of the product. An angular rate sensing unit of the product is an optical fiber ring, a digital closed-loop detection circuit is used for extracting the optical path difference of clockwise and counterclockwise propagation light caused by external physical angular rate and sensed by the optical fiber ring, and meanwhile, the optical path difference signal is converted into a voltage signal for closed-loop feedback and control, so that the modulation and demodulation of the signal are realized, and the purpose of high-precision angular rate signal detection is achieved.

1. 1. 1. Function

This product is composed of an optical angular velocity sensing unit and a signal detection unit, providing single-axis angular increment information and internal temperature information.

1. 1. 1. Scope of application

The products are mainly suitable for high-precision inertial navigation systems, positioning and orientation systems and other applications.

1. 1. Composition

The main components of the product are as follows:

1. The optical path unit comprise a light source, an optical fiber re, an integrated optical phase modulator, an optical fiber coupler and an optical detector;
2. The circuit unit comprises a light source driving circuit and a detection and control signal circuit board;
3. Gyroscope structural parts.
   1. Appearance and installation dimension

Overall dimension (mm): (98 ± 0.1) × (98 ± 0.1) × (35 ± 0.1) (L × W × H);
Installation dimension (mm): (80 ± 0.1) × (80 ± 0.1) (L × W), Φ5.4mm × 4, such as below



Main performance
parameters See the main performance parameters of the product for details.
Table 1 Main performance parameters
 

No.	Test item	Unit	Technical requirements
1	Overall dimensions	mm	98×98×35
2	Start time	min	≤3
3	Zero bias stability (10 s smoothing, 1σ)	º/h	≤0.02
4	Zero-bias repeatability	º/h	≤0.02
5	Random walk coefficient	º/h^1/2	≤0.001
6	Scale factor nonlinearity	ppm	≤20
7	Scale factor repeatability	ppm	≤20
8	Operating temperature	ºC	-40~+60
9	Storage temperature	ºC	-50~+70
10	Dynamic range	(°)/s	±300
11	Supply voltage	V	+5V
12	Steady-state power consumption	W	<4

Power requirements

Serial number	Name	Request
1	Power supply accuracy	±5%
2	Power ripple (Vpp)	20mV
3	Supply current	>1.5A

Electrical connection interface

Point number	Definition	Comment
1,9	+5V	Power supply input
2,10	GND	Power ground
5	RXD+	Gyro differential sorting and correcting
13	RXD-	Gyro differential gating negative
6	TXD+	Gyro differential output positive
14	TXD+	Gyro differential output negative
3,4,7,8,11,12,15	--	Reserved