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Single-Axis Fiber Optic Gyroscope
, High Precision Fiber Optic Gyroscope
FG-120C High Precision Single-Axis Fiber Optic Gyroscope
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Indicators Model
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FG-120C/H |
| Performance indicators |
bias stability① (°/h, 1σ) |
0.005/0.003 |
| bias stability② (°/h, 1σ) |
0.0015/0.001 |
| bias stability③ (°/h,full temperature, 1σ) |
0.01/0.005 |
| bias repeatability(°/h, 1σ) |
0.0015/0.001 |
| random walk(°/h 1/2) |
0.0003/0.0002 |
| scale factor nonlinearity (ppm) |
2/1 |
| scale factor asymmetry (ppm) |
2/1 |
| scale factor repeatability(ppm) |
5/5 |
| dynamic range(°/s) |
±500 |
| Mechanical/Electrical interface |
size(mm) |
120×120×36 |
| weight(g) |
870±10/880±10 |
| steady state power consumption at normal temperature(W) |
<2.5 |
| power supply(V) |
+5 |
| communication interface |
RS422 |
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Remarks:
① Static test at room temperature, 10s smooth, 1σ;
② Static test at room temperature, smooth for 100s, 1σ;
③ The temperature change rate is 1℃/min, smooth for 100s, 1σ.
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1 Overview
This document specifies the requirements and methods for the use and maintenance of the FG-120C high-precision single-axis fiber optic gyroscope (hereinafter referred to as the product).
2 Product Introduction
2.1 The working principle, function and application scope of the product
2.1.1 How it works
inertial angular rate sensor based on the optical Sagnac effect, used to measure the angular velocity of the carrier along the sensitive axis of the product . The angular velocity sensing unit of this product is an optical fiber ring, which uses a digital closed-loop detection circuit to extract the optical path difference of clockwise and counterclockwise propagating light caused by the external physical angular velocity that the optical fiber ring is sensitive to, and at the same time, the voltage signal converted from the optical path difference signal is closed-loop feedback and control to achieve signal modulation and demodulation, so as to achieve the purpose of high-precision angular velocity signal detection.
2.1.2 Function
This product consists of two parts: an optical angular velocity sensitive unit and a signal detection unit, providing single-axis angular increment information and internal temperature information.
2.1.3 Scope of application
The products are mainly suitable for medium and high precision inertial navigation systems, positioning and orientation systems, servo stabilization systems and other applications.
2.2 composition
The main components of the product are as follows:
a) Optical path unit: including erbium-doped light source, optical fiber ring, integrated optical phase modulator, optical fiber coupler, and optical detector;
b) Circuit unit: light source driving circuit, signal detection and control circuit;
c) Gyro structure.
2.3 Appearance and installation dimensions
Dimensions ( mm ): 120 ± 0.1 × 120 ± 0.1 × 36 ± 0.1 (length × width × height);
Installation dimensions ( mm ): 94 ± 0.1 × 94 ± 0.1 (length × width), hole position 4 × Φ6.4 , as shown in Figure
picture 1.
picture 1 FG-120C fiber optic gyroscope appearance and installation diagram
2.4 Weight Total product weight: 890g±20g.
2.5 Main performance parameters (Table 1)
NO. Test items unit Technical requirements
1 Dimensions mm 120×120×36
2 Startup time s 3
3 Bias (°)/h ≤0.25
4 Zero bias stability at room temperature (constant temperature) (°)/h ≤0.005 (10s smoothing)
≤0.002 (100s smoothing)
5 Constant temperature bias repeatability (°)/h ≤0.0 01 Constant temperature (-40℃~70℃)
6 Bias repeatability in different temperature ranges (°)/h Range < 0.02 (maximum value minus minimum value)
7 At constant temperature (-40°C~70°C)
Normal temperature: Select 7 groups for measurement
-40℃: Select 7 groups for measurement
70℃: Select 7 groups for measurement (°)/h Take the variance value, data <1‰
The highest accuracy can reach 0.0005
8 Update rate Hz >2000
9 Zero bias sensitivity (°)/h/ Gs ≤0.003
10 Random walk coefficient (º)/h1/2 ≤0.0003
11 Scale factor nonlinearity ppm ≤2
12 Scale factor asymmetry ppm ≤2
13 Scale factor repeatability ppm ≤5
14 Threshold (°)/h ≤0.002
15 Resolution (°)/h ≤0.002
16 bandwidth Hz ≥200
17 Operating temperature ℃ -45～+70
18 Storage temperature ℃ -55～+85
19 Dynamic Range (°)/s ±300
20 Supply voltage V +5
21 Steady-state power consumption at room temperature W ≤2.5
22 power consumption at full temperature W ≤4
23 Starting instantaneous current A <1.5
2.6 Mechanical and electrical interface relationship
2.6.1 Power Requirements
The product is powered by a +5V DC power supply. The power supply requirements are shown in Table 2:
Table 2 Power supply requirements for FG-120C fiber optic gyroscope
Serial number name Require
1 Power supply accuracy ±5%
2 Power supply ripple ( Vpp ) ≤50mV
3 Supply current >1.5A
2.6.2 Electrical connection interface
of the gyro-end connector is: J30JZLN9ZKCA000, and the matching connector (model: J30JZ/XN9TJCAL01 ) is provided . The reserved wire length is: 200mm±20mm (calculated from the outlet position, excluding the metal part of the connector ), as defined in Table 3.
Table 3 J30JZLN9ZKCA000 gyro connector and test line point definition
Core point number definition Notes
1 +5V Power Input
2 GND Power Ground
3 reserve --
4 RXD+ Gyro differential gate positive
5 TXD+ Gyro RS422 output positive
6 +5V Power Input
7 GND Power Ground
8 RXD- Gyro differential gate negative
9 TXD- Gyro RS422 output negative
Note: When connecting or touching this product, anti-static measures should be taken in accordance with the provisions of GJB 1649-1993 .
2.6.3 Communication Protocol
Communication interface: RXD and TXD are both RS422/485 differential communication interfaces. RXD is used to receive differential pulse (or square wave) synchronous selection signals, and TXD is used for serial data signal output.
Communication protocol: After receiving the falling of the selection signal, the gyro latches the internal angle increment data and starts to output the gyro data packet through TXD within 1μs. The transmission baud rate is 921.6 kbps. The data packet contains 11 bytes, each byte has 1 start bit, 8 data bits, 1 stop bit, and no parity bit.
The angular increment information is the angular increment value of the gyroscope during the time between two selection signals. The accumulated angular increment value during a period of time divided by the interval time is the average angular velocity of the gyroscope during this period of time.
The data packet format is as follows:
Table 4 Gyro data packet format
Byte sequence number content
1 99 (hexadecimal)
2 66 (hexadecimal)
3 Status word, normal value is FF (hexadecimal)
4 Gyro angle increment 1, LSB
5 Gyro angle increment 2
6 Gyro angle increment 3
7 Gyro angle increment 4, MSB
8 Temperature data, LSB
9 Temperature data, MSB
10 Frame number, incremented each time it is sent, cyclic count
11 Checksum, the sum of bytes 3 to 10
Note: The temperature dimension is 16.
The meaning of the status word is as follows:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
reserve reserve reserve Circuit control status reserve reserve reserve Optical path status
Among them: "Reserved" bit is always 1;
When the "circuit control status" bit is 1, it means that the gyro circuit control status is normal, and when it is 0, it means that the control status is abnormal;
When the "optical path status" bit is 1, it means that the gyro optical path is working normally. When it is 0, it means that the gyro optical path status is abnormal.
If any of the above two status bits is always 0 during the use of the gyroscope, and is accompanied by abnormal gyroscope data, the gyroscope should be returned for repair.
3 Product installation and removal
3.1 Require
The user is responsible for installing and disassembling the product. During this process, the product must not be hit, knocked or bumped, and the outer surface of the product must not be machined.
a) The surface used to fix the product requires a flatness better than 0.02mm;
b) It is recommended that the heat dissipation of the product mounting base be fully considered during product testing.
3.2 Post-installation inspection
Check whether each mounting screw meets the size of the mounting hole and is firm.
4 Operating Procedure
4.1 Inspection before use
Check the appearance of the product for any physical damage such as collision.
4.2 Instructions for use of the product
a) Install the product on the carrier and connect the cables correctly according to the requirements in Table 3;
b) Perform data connection according to the communication protocol in 2.6.3.
4.3 Precautions
a) The gyroscope should not be frequently powered on and off during use to avoid damaging the gyroscope's performance and reducing its service life;
Before the gyroscope is powered on , the power supply system should be checked to ensure that there is no short circuit between the power supply voltage and the electrical points, and between the gyroscope housing and the electrical points;
c) If this product malfunctions, please consult the manufacturer. Do not disassemble or repair it without authorization.
d) The fiber optic gyroscope is a precision instrument and should be handled with care during use and transportation;
e) Correct connection of product input and output signal lines and power supply lines must be ensured;
f) Anti-static measures are required when contacting the product;
g) The magnetic field strength around the product location is required to be less than 10 Gauss.
5 Maintenance and care
a) Before the product is loaded into the carrier, it is required to be powered on at least once every 6 months, and the power-on time is 3600s. The power-on time does not require the testing of the product's electrical parameters;
b) After the product is loaded into the carrier, it is required to be powered on at least once a year for 3600s. It is not required to test the electrical parameters of the product when powered on.
6 Transportation and storage requirements
6.1 Transportation Notes
a) Place the product in the direction indicated in the packaging box;
b) Transport by road, rail, air and water is permitted;
c) During transportation, ensure that the packaging box is firmly secured to the carrier and does not move.
6.2 Storage conditions, shelf life and precautions
a) Products placed in packaging boxes should be stored under standard atmospheric pressure, with an ambient temperature of 25°C ± 10°C, a relative humidity of 30% to 50%, and an ambient magnetic field strength of less than 10 Gauss;
b) The product shelf life is 15 years.
7 Unpacking Notes
a) Check the appearance of the outer packaging for any physical damage such as collision;
b) Check whether the product and supporting accessories are complete, see Table 7 for details.
c) When taking out the product, electrostatic protection should be performed.
Table 7 Product delivery list
Serial number name quantity
1 FG- 120C Fiber Optic Gyroscope 1
2 Gyroscope packaging box 1
3 Gyroscope test report 1
4 J30JZ/XN9TJCAL01 Connector 1
5 Certificate 1
Product Description:
The Gyroscope product operates at a supply voltage of +5V, making it compatible with a wide range of systems and applications. The starting instantaneous current is less than 1.5, which means that it won't put a significant load on your system. This makes it an ideal choice for battery-powered devices and other low-power applications.
One of the key features of the Gyroscope product is its zero bias sensitivity, which is less than or equal to 0.003. This means that the device is highly accurate even when there is no external movement or acceleration. This is particularly important for applications that require precise measurements, such as navigation systems and control systems.
The Gyroscope product is designed to be highly efficient, with a power consumption of less than 4 at full temperature. This means that it won't draw too much power from your system, even when it's operating at maximum capacity. This makes it an ideal choice for systems that require long battery life or are otherwise power-constrained.
In summary, the Gyroscope product is an essential tool for anyone who needs to measure angular velocity and acceleration accurately. With its fast startup time, low starting instantaneous current, zero bias sensitivity, and low power consumption, it's a versatile and reliable choice for a wide range of applications. Whether you're building a drone, a robot, or an industrial system, the Gyroscope product is a must-have.
Features:
- Product Name: Gyroscope
- Random walk coefficient: ≤0.0003
- Scale factor nonlinearity: ≤2
- Supply voltage: +5V
- Resolution: ≤0.002
- Zero bias stability at room temperature (constant temperature): ≤0.005 (10s Smoothing) ≤0.002 (100s Smoothing)
- Keywords: Fiber Optic Gyro, Fiber Optic Gyroscope, Gyroscope Sensor Chip
Technical Parameters:
| Technical Parameter |
Value |
| Dimensions |
120×120×36mm |
| Measurement Groups |
7 groups at constant temperature (-40°C~70°C) |
| Variance Value |
Data <1‰ |
| Highest Accuracy |
0.0005 |
| Bias |
≤0.25 |
| Startup Time |
3s |
| Scale Factor Repeatability |
≤5 |
| Bias Repeatability in Different Temperature Ranges |
Range < 0.02 (maximum Value Minus Minimum Value) |
| Dynamic Range |
±300 |
| Operating Temperature |
-45～+70 |
| Resolution |
≤0.002 |
| Scale Factor Asymmetry |
≤2 |
Applications:
The FOVA FG-120C is an advanced electronic gyroscope sensor designed for a wide range of applications. It is a high-precision accelerometer and gyro sensor that offers accurate and reliable measurements in various scenarios. The FG-120C is manufactured in SHENZHEN and is certified by ROHS, ensuring its quality and safety.
The FG-120C is a versatile device that can be used in a variety of applications, including aerospace, automotive, robotics, and industrial automation. It is particularly useful in applications that require precise motion and position tracking, such as drone navigation, remote sensing, and virtual reality. The FG-120C is also ideal for applications that require low-power consumption and high stability, such as wearable devices and mobile phones.
The FG-120C is easy to integrate into existing systems and can be used in combination with other sensors to provide more accurate and reliable data. The sensor chip is designed to withstand harsh environmental conditions, making it suitable for use in outdoor and industrial settings. The FG-120C has a bias repeatability of less than 0.02 in different temperature ranges, ensuring consistent and accurate readings. The scale factor nonlinearity is less than 2, which reduces errors in measurement. The threshold is less than 0.002, ensuring that the device can detect even the smallest changes in motion.
The FG-120C has a starting instantaneous current of less than 1.5, which makes it ideal for use in low-power applications. The zero bias sensitivity is less than 0.003, ensuring that the device can measure even the smallest changes in motion. The FG-120C has a minimum order quantity of 10 and a delivery time of 25 days. Payment terms are T/T, and the supply ability is 1000pcs/month, ensuring that the device is readily available for use in various applications.
Customization:
With a minimum order quantity of 10, we can deliver your order within 25 days. Payment terms are T/T and we have the ability to supply up to 1000pcs/Mouth.
Our Gyroscope boasts a resolution of ≤0.002, with a zero bias sensitivity of ≤0.003. It can operate in temperatures ranging from -45～+70 and can be stored in temperatures ranging from -55～+85.
The dimensions of the Gyroscope are 120×120×36mm, making it compact and easy to integrate into your application.
Trust in FOVA's expertise in the development and manufacture of Gyroscopes and Accelerometer Gyro Sensors.
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