FG-120C High Precision Single-Axis Fiber Optic Gyroscope
Indicators Model
| 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 |
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. | |
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:
One of the key attributes of this Gyroscope is its wide operating
temperature range of -45°C to +70°C, which makes it suitable for
use in extreme environments. It has a low random walk coefficient
of ≤0.0003, which ensures accurate and reliable measurements under
all conditions.
At constant temperatures ranging from -40°C to +70°C, the Gyroscope
provides exceptional accuracy with a variance value of less than
1‰. It has been tested by selecting 7 groups of measurements at
-40°C, normal temperature, and 70°C. The data is then analyzed to
take the variance value, which ensures that the highest accuracy
can reach 0.0005.
Another important attribute of this Gyroscope is its zero bias
stability at room temperature. With 10s smoothing, it has a zero
bias stability of ≤0.005, while with 100s smoothing, it has a zero
bias stability of ≤0.002. This ensures that the device provides
reliable and accurate measurements over extended periods of time.
Despite its advanced capabilities, the Gyroscope is designed to be
energy-efficient, with a power consumption of less than 4 watts at
full temperature. This makes it an ideal choice for applications
where power consumption is a critical factor.
In summary, the Gyroscope is a highly advanced IMU Accelerometer
Gyro that offers exceptional performance, accuracy, and reliability
in challenging environments. With its wide operating temperature
range, low random walk coefficient, high accuracy, and low power
consumption, it is an ideal choice for applications in aerospace,
defense, robotics, and other industries that require precise
measurement of orientation, rotation, and acceleration.
Keywords: IMU Accelerometer Gyro, Gyroscopes
Features:
- Product Name: Gyroscope
- Dimensions: 120×120×36mm
- Measurement:
- 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
- Take The Variance Value, Data <1‰
- The Highest Accuracy Can Reach 0.0005
- Constant temperature bias repeatability: ≤0.001 Constant
Temperature (-40℃~70℃)
- Zero bias sensitivity: ≤0.003
- Starting instantaneous current: <1.5
Keywords: Fiber Optic Gyro, Gyratory Screening Machine, Electronic
Gyroscope Sensor
Technical Parameters:
| Technical Parameter | Value |
|---|
| Gyroscopes | Fiber Optical Gyroscope |
| Startup time | 3s |
| Starting instantaneous current | <1.5 |
| Constant temperature bias repeatability | ≤0.001 Constant Temperature (-40℃~70℃) |
| Dynamic Range | ±300 |
| Steady-state power consumption at room temperature | ≤2.5W |
| Threshold | ≤0.002 |
| Scale factor nonlinearity | ≤2 |
| Supply voltage | +5V |
| Scale factor asymmetry | ≤2 |
Applications:
The FOVA FG-120C is a high-performance Fiber Optic Gyroscope
designed and manufactured in SHENZHEN. With its ROHS certification,
it is a reliable and safe choice for various applications. 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/Mouth.
This Fiber Optic Gyroscope is ideal for a range of occasions and
scenarios, including:
- Vehicle Navigation: The FG-120C is a perfect fit for vehicle navigation systems. Its
high accuracy and low power consumption make it ideal for
application in autonomous vehicles, drones, and other unmanned
vehicles.
- Fiber Optic Gyrocompass: The FG-120C can be used as a Fiber Optic Gyrocompass to provide an
accurate heading reference for ships and other marine applications.
Its high accuracy and compact size make it an ideal choice for
ships and boats.
- Industrial Automation: The FG-120C can be used in industrial automation systems to
provide accurate measurements of rotational motion. Its high
accuracy and low power consumption make it ideal for use in a wide
range of applications, including robotics, manufacturing, and more.
- Aviation and Aerospace: The FG-120C is an ideal choice for aviation and aerospace
applications. Its high accuracy and low power consumption make it
an ideal choice for use in navigation systems, autopilots, and
other flight control systems.
- Defense and Security: The FG-120C can be used in defense and security applications to
provide accurate measurements of rotational motion. Its high
accuracy and low power consumption make it an ideal choice for use
in military drones, missiles, and other defense systems.
The FOVA FG-120C fiber optic gyroscope has a scale factor
repeatability of ≤5, which ensures high accuracy and reliability.
Its operating temperature range of -45～+70 makes it suitable for
use in a wide range of environments. With a power consumption of ≤4
at full temperature, it is an energy-efficient choice for various
applications. The constant temperature bias repeatability of
≤0.0001 Constant Temperature (-40℃~70℃) ensures high accuracy and
stability. The starting instantaneous current is <1.5, making it
easy to use and operate.
Customization:
Our gyroscope product is certified with ROHS and has a minimum
order quantity of 10. The delivery time is 25 days, and payment
terms are T/T. Our supply ability is 1000pcs per month.
Choose FOVA as your trusted supplier for the highest quality fiber
optic gyro and electronic gyroscope sensor. Our FG-120C model
originates from SHENZHEN, ensuring that your product is made with
precision and care.
FG-120C Single-Axis Fiber Optic Gyroscope with Zero Bias Stability of ≤0.002 100s Smoothing at Constant Temperature
