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Waterproof Mems Imu U3700 High Accuracy Inertial Sensor with Canopen Modbus Protocols

Waterproof Mems Imu U3700 High Accuracy Inertial Sensor with Canopen Modbus Protocols

The U3700 series is an IMU/VRU/AHRS sensor composed of an array MEMS-IMU and a magnetometer. It is equipped with self-developed adaptive extended Kalman filtering, IMU noise dynamic analysis algorithm, and carrier motion state analysis algorithm, which can meet the accuracy of attitude angle under high dynamic conditions and reduce heading angle drift.  

Every sensor undergoes fine compensation including temperature, zero bias, scaling factor, and cross axis before leaving the factory.

The U3700 series sensors transmit data through various interfaces such as UART (RS-232/TTL), RS-485, CAN, and have rich user configurations. The U3700 series can synchronize with the system through external triggering, and also align with external systems such as radar and camera time through synchronous output function. Multi-functional upper computer (GUI) can help quickly evaluate products, including but not limited to module configuration, data display, firmware upgrade, data recording, etc.

  • Part No, :

    U3700
  • Order(MOQ) :

    1
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  • Description

Product Series and Parameters

Attitude Precision U3700-A U3700-B U3700-C U3700-D U3700-E U3700-F U3700-G Unit
Pitch (±90°) /Roll (±180°) (static) 0.15(nom), 0.2(max) °
Pitch (±90°) /Roll (±180°) (dynamic) 0.15(nom) 0.3(max) 0.15(nom)
0.2(max)
°
Yaw (±180°) static drift 2hrs (6DOF) ① 0.15(nom), 0.2(max) °
Yaw (±180°) dynamic drift (6DOF) ② 9 5 °
Magnetic assist (AHRS)③ 2(nom), 3(max) °
Yaw rotation error (6DOF) (rotation under 100°/s)④ <0.8(nom)
3(max)
<0.8(nom)
1(max)
<0.8(nom)
1.3(max)
°
Note:
① Module horizontally stationary for 2 hours.
② The module was measured after 1 hour of movement on an indoor robot, 1σ
③ After geomagnetic calibration, the product needs to be configured in AHRS mode when there is no magnetic field interference in the surrounding area.
④ The turntable rotates continuously for 10 turns, and the heading angle accumulates error.
Gyroscope U3700-A U3700-B U3700-C U3700-D U3700-E U3700-F U3700-G Unit
Measurement range ±2000 ±4000 °/s
Resolution 16 20 bit
Scale factor(100°/s)①  <500(nom)
600(max)
<200(nom)
350(max)
  <100(nom)
200(max)
      ppm
Nonlinearity② ±0.05             %Fs
Noise density③ 0.015 0.008   0.006 0.0025   0.0015 °/s/√Hz
3dB Bandwidth 90(nom), 200(max) 90(nom), 400(max) Hz
Zero speed output④   ±0.1 °/s
Sampling Rate 1000 Hz
Zero bias instability (Allan, 1σ)  3 1.6 1.2 1.7 1 °/h
Zero bias stability (10s, 1σ) 10 5 4 2.3 °/h
Zero bias repeatability (1σ)  15 12 8 3.7 1.8 °/h
Angle random walk (Allan 1σ)  0.42 0.25 0.18 0.15 0.05 °/√h
Full temperature zero bias-40-85℃⑤ 0.07(nom), 0.2(max) °/s
Accelerometer sensitivity (All 3 axis) 0.1 0.05 °/s/g
Notes:
①: Rotate the turntable 10 times in both directions and take the average measurement
②: Maximum deviation from the best fit line within the specified range
③: Test the sample mean
④: After the initial zero-bias calibration, the zero bias can be estimated in real-time in the algorithm engine.
⑤: The temperature rise slope measured by the temperature chamber turntable in the lab is less than 3℃/min.
Accelerometer U3700-A U3700-B U3700-C U3700-D U3700-E U3700-F U3700-G Unit
Measurement range ±12 ±8(nom), ±32(max) g
Resolution 16 20 bit
Initial bias drift 5(max) 2(nom), 5(max) mg
Nonlinearity 0.5 0.01 %Fs
3dB Bandwidth 80(nom), 200(max) 80(nom), 400(max) Hz
Sampling Rate 1600 1000 Hz
Zero bias instability (Allan, 1σ) 0.03 0.018 0.014 0.012 0.007 mg
Zero bias stability (10s, 1σ) 0.07 0.035 0.025 0.015 0.008 mg
Zero bias repeatability (1σ) 0.34 0.15 0.1 0.11 0.05 mg
Angle random walk (Allan, 1σ)  0.08 0.04 0.028 0.018 0.01 m/s/√h
Full temperature zero bias-40-85℃ (1σ) 2(nom), 3(max) 2.5(nom), 5(max) mg
Magnetometer U3700-A U3700-B U3700-C U3700-D U3700-E U3700-F U3700-G Unit
Range / / ±8 ±8 / ±20 / Gauss
Resolution (Fs=2G) / / 2 2 / 2 / mGuass
Sampling / / 200 200 / 200 / Hz
Linearity (Best fitting straight line Fs=2G) / / 0.1 0.1   0.2   Fs%
Temperature sensor U3700-A U3700-B U3700-C U3700-D U3700-E U3700-F U3700-G Unit
Range -40 ~ +85            
Offset error ±1             K
Mechanical/Environment U3700-A U3700-B U3700-C U3700-D U3700-E U3700-F U3700-G Unit
Power supply 4.8 ~ 48 (USB/UART(RS-232/TTL))
7 ~ 48 (RS485/CAN)
V
Power consumption 300 400 600 400 600 mW
Working temperature -40 - 85
Starting time① 2 s
Size M12 connector interface: 58.5*40*20
PG connector interface: 40*36*16
mm
Weight <75 g
Shell material and process Aluminum alloy CNC  
Assembling screws M3  
Anti-Vibration  1.0mm(10Hz-58Hz) &≤20g(58Hz-600Hz)  
Shock (duration <1ms) 2000 g
Environment protection RoHS Directive 2011/65/EU  
EMC CE  
IP grade IP68 Anti-water  
Drop test Free fall 3 times on a 75cm high experimental platform  
Temperature shock Raise the temperature from -40 to 85 ℃ within 1h, 5 times  
Notes:
① Startup time refers to the time it takes for the system to shut down and output valid data. During this period, the module should be kept stationary
Interface Parameters Condition Min Normal Max Unit
UART Baud-rate①   9600 115200 921600 bps
Starting bits     1   bit
Data length     8   bits
Stop bit     1   bit
Checksum     None   bit
Output framerate②   0 100 1000 Hz
Input impedance RS-232 3 5 7
Output impedance 300 10M   Ω
CAN Baud-rate③   125 500 1000 kbps
Output framerate④   5 100 200 Hz
Input impedance⑤ with 120 Ω resistor   120   Ω
without 120 Ω resistor 19 30 52
RS485 Baud-rate Modbus 921600 115200 115200 bps
non-Modbus 921600 115200 460800 bps
Starting bits     1   bit
Data length     8   bits
Stop bit     1   bit
Checksum     None   bit
Output Frame Rate Modbus 0 10 50 Hz
non-Modbus 0 100 250 Hz
Input impedance⑤ with 120 Ω resistor   120   Ω
without 120 Ω resistor 48    
Trigger Pin Logic Voltage⑥ High 2     V
Low     0.6 V
Delay⑥ From trigger to data transmission     800 us
Notes:
① If modifications are required, please refer to the instruction and programming manual. 
② The sensor supports data output at 1, 5, 10, 50, 200, 250, 500, and 1000 Hz. 
③ If modifications are required, please refer to the instruction and programming manual. 
④ The sensor supports 5, 10, 50, 100, and 200 Hz data output. 
⑤ By default, there is no 120 Ω resistor connected
⑥ Please refer to the synchronization function chapter and instruction and programming manual for triggering timing and configuration.

 


Production process


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Product dimension

IMU


Application Scenarios

Inertial Measurement Unit application
The U3700 high-precision six-axis MEMS IMU is suitable for navigation and control scenarios such as UAV flight control, vehicle/ship attitude measurement and integrated navigation, antenna stabilization platform and mobile mapping.
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FAQ

Q1: What are some typical application scenarios?
A: It can be used in UAV attitude reference/trajectory control, platform stabilization and control, construction machinery, low-speed autonomous robots, precision instruments, underground equipment, etc.
 
Q2: What is the typical attitude accuracy?
A: Pitch/Roll (static): typically 0.15° (maximum 0.2°); Pitch/Roll (dynamic): typically 0.15° (maximum values ​​may vary slightly depending on the version).
 
 
Q3: What are the gyroscope's range, bandwidth, and sampling rate?
A: Gyroscope range: ±2000°/s (adjustable), 3dB bandwidth: 47Hz (typical), up to 230Hz (maximum), sampling rate: 1000Hz.
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