dji Zenmuse L2 Powerful Range Elevated Precision User Guide

dji Zenmuse L2 Powerful Range Elevated Precision

Product Information

• Product Name: ZENMUSETM L2
• Version: v1.0

In the Box

OVERVIEW

1. Gimbal Connector
2. Pan Motor
3. Roll Motor
4. Tilt Motor
5. microSD Card Slot
6. RGB Mapping Camera
7. LiDAR

Disclaimer

By using this product, you signify that you have read, understand, and accept the terms and conditions of this guide and all instructions at https://enterprise.dji.com/zenmuse-l2/downloads. EXCEPT AS EXPRESSLY PROVIDED IN AFTER-SALES SERVICE POLICIES AVAILABLE AT https://www.dji.com/service/policy, THE PRODUCT AND ALL MATERIALS AND CONTENT AVAILABLE THROUGH THE PRODUCT ARE PROVIDED “AS IS” AND ON “AS AVAILABLE BASIS” WITHOUT WARRANTY OR CONDITION OF ANY KIND.

Warnings

1. The ZENMUSETM L2 has been calibrated specifically for the designated camera and lens before leaving the factory. No physical or mechanical modification or adjustment of the gimbal is required or recommended. DO NOT add any other component or device to the camera such as a filter or lens hood.
2. Only use the L2 with specified compatible DJITM aircraft. Make sure the firmware of the aircraft and the remote controller are the latest versions.
3. DO NOT expose the LiDAR to strong sources of energy such as a laser beam or any other LiDAR in use. Otherwise, the LiDAR may be permanently damaged.
4. Be careful when using the L2 in conditions with low visibility such as foggy or stormy weather as the detection range may be reduced.
5. DO NOT touch the optical window of the L2. Dust and stains on the optical window can negatively affect the performance. Use compressed air, isopropyl alcohol, or a lens cloth to clean the optical window correctly. Refer to the L2 User Manual for more information on how to clean optical windows. DO NOT use substances containing alcohol, benzene, thinners, or other flammable substances to clean or maintain the RGB mapping camera.
6. DO NOT drop the L2. Calibrate the L2 using DJI TERRATM if the point cloud data is inaccurate or the output is layered.

Introduction
The Zenmuse L2 integrates a LiDAR module, a high-accuracy IMU, and an RGB mapping camera on a 3-axis stabilized gimbal, which can be used with specified compatible DJI aircraft. With Point Cloud LiveView, users can take a quick view of the 3D point cloud effect in the DJI PILOTTM 2 app. When used with DJI Terra, the L2 offers a complete solution that generates point cloud output and extracts ground points to generate DEM results, which efficiently completes highly accurate reconstructed models of complex structures.

Installation

• To ensure the mapping accuracy, make sure the L2 is mounted on a single downward gimbal connector with the cable connected to the right USB-C port (when facing the aircraft).
• Make sure the gimbal connector on the aircraft is positioned correctly when mounting. Otherwise, the L2 cannot be mounted.
• Only remove the L2 after powering off the aircraft.
• Remove the L2 by pressing the button on the aircraft to detach the gimbal and camera.
• Make sure the microSD card slot cover is firmly in place to prevent dust or moisture entering during usage or transportation.
• To avoid burns, DO NOT touch the camera case and the optical window when powering on.
• Detach the gimbal from the aircraft during transportation or storage. Otherwise, the service life of the damper balls may be shortened or they may even be damaged.

Camera Controls

Remote Controller
With the buttons on the DJI RC Plus remote controller, users can switch between point cloud and visible light live views, preview the point cloud effect, and control the gimbal and camera.

1. L1/L2/L3/R1/R2/R3 Buttons: go to Camera View in DJI Pilot 2 to view the specific functions of these buttons. Refer to the DJI Pilot 2 App section for details.
2. 5D Button*
3. Customizable C1/C2/C3 Buttons*
4. Left Dial: adjust the tilt of the gimbal.
5. Record Button: press once to start or stop recording.
6. Focus/Shutter Button: press the button halfway down for autofocus and all the way down to take a photo.
7. Right Dial: adjust the pan of the gimbal.

• The function of these buttons can be customized in the DJI Pilot 2 app.

DJI Pilot 2 App
In DJI Pilot 2 app, users can perform a flight mission or use Manual mode to record point cloud data, preview the model and take a quick view of 3D point cloud effect.

1. View Type
2. Camera Parameters
3. Auto Exposure Lock
4. Focus Mode
5. Storage Info
6. Exposure Settings
7. IMU Calibration Status
8. Camera Settings
9. Recording Mode (Shutter/Video Record/Point Cloud Record)
10. Shooting Button (Shutter/Video Record/ Point Cloud Record)
11. Playback
12. Switch Coloring Coding (point cloud view)
13. Preview
14. FPV Camera View
15. Navigation Display
16. Map View
17. Laser PinPoint
18. Visible Light/Point Cloud Toggle
19. Single/Side-By-Side View Toggle
20. Gimbal Mode
21. Laser Ranging
22. Flight Route Library

The above image is for reference only. The actual interface varies according to the app version.

Mission Flight

Users can create a flight mission to record point cloud data in DJI Pilot 2 and import the recorded data into DJI Terra for high-precision model reconstruction.

Getting Started

1. Make sure the L2 is correctly installed on the single downward gimbal connector of the aircraft, and that the aircraft and remote controller are linked after powering on.
2. Go to camera view in DJI Pilot 2, select ****and then Precise Positioning Setting. Choose the RTK service type, and make sure that the status of RTK positioning and heading both display FIX.
3. Adjust the camera parameters on the upper right corner of camera view according to the surroundings. Make sure the photo is well exposed. Tap ****to switch exposure modes. It is recommended to set Auto mode for recording point cloud data.

Recording Point Cloud Data
To record point cloud data, create a flight mission or begin a manual flight. The following uses an Area Route as an example.

1. Enter the camera view in DJI Pilot 2 and tap ****, select Create a Route, and then Area Route. Tap on the map view, and drag the boundary point to adjust the range of the mapping area.
2. Choose the aircraft, and then select Zenmuse L2, LiDAR Mapping. Set the Payload Settings, Advanced Settings, and other parameters. It is recommended to set the Side Overlap (LiDAR) to above 20%, the Scanning Mode to Repetitive, the altitude to 150 m, the flight speed to 15 m/s, and to enable Calibrate IMU.
3. Tap to save the task and tap to upload and execute the flight mission.
4. Power off the aircraft after the mission is completed and remove the microSD card from the L2. Insert the microSD card into a computer and check the point cloud data and other files in the DCIM folder.

Read the Zenmuse L2 User Manual for more information about setting parameters for Photogrammetry missions, and recording point cloud data with Mission and manual flights.

Reconstruction in DJI Terra
Follow the steps below to reconstruct point cloud data in DJI Terra.

1. Launch DJI Terra and select New Mission. Then create and save a point cloud post-processing mission.
2. Selec ****t in the mission editing view and import the folder from the microSD card. The folder will be named according to the time the first point cloud data was recorded.
3. Click to start reconstruction and wait until it is completed.
4. Open the current mission folder to check the result of the reconstruction.

Read the DJI Terra User Manual for more information about how to configure and use a reconstruction in DJI Terra.

Specifications

General

• Dimensions 155×128×176 mm
• Weight 905 ± 5 g
• Power 28 W (typical), 58 W (max.)
• IP Rating IP54
• Operating Temperature -20° to 50° C (-4° to 122° F)
• Supported Aircraft Matrice 350 RTK, Matrice 300 RTK (Requires DJI RC Plus remote controller)

System Performance

• Detection Range [1]
  • 450m @50% reflectivity, 0 klx
  • 250m @10% reflectivity, 100 klx
• Point Cloud Rate
  • Single return: max. 240,000 pts/s
  • Multiple returns: max. 1,200,000 pts/s
• System Accuracy [2]
  • Vertical: 4 cm @ 150 m
  • Horizontal: 5 cm @ 150 m
• Real-Time Point Cloud Coloring Coding Reflectivity, Altitude, Distance, RGB

LiDAR

• Ranging Accuracy (RMS 1σ) [3] 2 cm @ 150 m
• Maximum Returns Supported 5
• FOV
  • Repetitive scanning pattern: 70°×3°
  • Non-repetitive scanning pattern: 70°×75°
• Laser Wavelength 905 nm
• Laser Safety Class 1 (IEC 60825-1:2014) (Safe for eyes)

Inertial Navigation System

• IMU Update Frequency 200 Hz
• Accelerometer Range ± 6 g
• Angular Velocity Meter Range ± 300 dps
• Yaw Accuracy (RMS 1σ) [2]
  • Real-time: 0.2°
  • Post-processing: 0.05°
• Pitch/Roll Accuracy (RMS 1σ) [2]
  • Real-time: 0.05°
  • Post-processing: 0.025°
• Positioning Accuracy (RTK FIX)
  • Horizontal: 1 cm+1 ppm
  • Vertical: 1.5 cm+1 ppm

RGB Mapping Camera

• Sensor 4/3 CMOS, 20 MP
• Photo Size 5280×3956
• Focal Length 24 mm (equivalent)
• Shutter Speed Mechanical shutter: 1/2000-2 s
• ISO Photo: 100-6400
• Aperture Range f/2.8-f/11
• Supported File System exFAT
• Photo format JPEG/DNG (RAW)

Gimbal

• Stabilization System 3-axis (tilt, roll, pan)
• Angular Vibration Range 0.01°
• Mounting Detachable DJI SKYPORT
• Controllable Rotation Range
  • Tilt: -120° to +30°
  • Pan: ± 90°

Data Storage

• Raw Data Storage Photo/IMU/Point cloud/GNSS/Calibration files
• Supported microSD Cards microSD: Sequential writing speed of 50 MB/s or above and a UHS-I Speed Grade 3 rating or above; Max capacity: 256 GB

Post-Processing Software

• Supported Software DJI Terra
• Data Format
  • DJI Terra supports exporting standard format point cloud models:
  • Point cloud format: PNTS/LAS/PLY/PCD/S3MB
  • Trajectory file format: sbet.out/sbet.txt

1. Measured using a flat target with a size larger than the laser beam diameter, perpendicular angle of incidence, and with an atmospheric visibility of 23 km. In low-light environments, the laser beams can achieve the optimal detection range. If a laser beam hits more than one target, the total laser transmitter power is split and the achieveable range is reduced.
2. The accuracy was measured under the following conditions in a DJI laboratory environment: using an Area Route mission with Calibrate IMU enabled in DJI Pilot 2, and using repetitive scanning with the RTK in the FIX status. The relative altitude was set to 150 m, flight speed to 15 m/s, gimbal pitch to -90°, and each straight segment of the flight route was less than 1500 m. Choose objects with obvious angular features for data collection. DJI Terra was used for postprocessing with Optimize Point Cloud Accuracy enabled. If not enabled, the vertical accuracy is 4 cm and the horizontal accuracy is 8 cm.
3. Measured in an environment of 25° C (77° F) with a target of 80% reflectivity at a distance of 150 m. The actual environment may differ from the testing environment. The figure listed is for reference only.

Compliance Information

FCC Compliance Statement Supplier’s Declaration of Conformity
Product name: DJI L2
Model Number: ZL2
Responsible Party: DJI Research LLC
Responsible Party Address: 17301 Edwards Road, Cerritos, CA 90703
Website: www.dji.com
We, DJI Research LLC, being the responsible party, declares that the above mentioned model was tested to demonstrate complying with all applicable FCC rules and regulations.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

ISED Compliance
CAN ICES-003 (B) / NMB-003(B)
EU & UK Compliance Notice

EU Compliance Statement: SZ DJI TECHNOLOGY CO., LTD. hereby declares that this device (DJI L2) is in compliance with the essential requirements and other relevant provisions of the Directive 2014/30/ EU.
A copy of the EU Declaration of Conformity is available online at www.dji.com /euro-compliance EU contact address: DJI GmbH, Industriestrasse 12, 97618, Niederlauer,

Germany
GB Compliance Statement: SZ DJI TECHNOLOGY CO., LTD. hereby declares that this device (DJI L2) is in compliance with the essential requirements and other relevant provisions of Electromagnetic Compatibility Regulations 2016. A copy of the GB Declaration of Conformity is available online at www.dji.com/euro- compliance

CLASS 1 CONSUMER LASER PRODUCT
EN50689:2021/ EN60825- 1:2014+A11:2021/ IEC60825-1:2014. Complies with 21 CFR 1040.10 and 1040.11 except for conformance with IEC 60825- 1 Ed. 3., as described in Laser Notice No. 56, dated May 8, 2019.

Caution use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

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This content is subject to change without prior notice. DJI and ZENMUSE are trademarks of DJI. Copyright © 2023 DJI All Rights Reserved.

References

• Zenmuse L2 - Downloads - DJI
• After-Sales Service Policy - DJI

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