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The dataset generation failed
Error code:   DatasetGenerationError
Exception:    ArrowNotImplementedError
Message:      Cannot write struct type 'flags' with no child field to Parquet. Consider adding a dummy child field.
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1594, in _prepare_split_single
                  writer.write(example)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 598, in write
                  self.write_examples_on_file()
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 571, in write_examples_on_file
                  self.write_batch(batch_examples=batch_examples)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 661, in write_batch
                  self.write_table(pa_table, writer_batch_size)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 672, in write_table
                  self._build_writer(inferred_schema=pa_table.schema)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 713, in _build_writer
                  self.pa_writer = pq.ParquetWriter(
                                   ^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/pyarrow/parquet/core.py", line 1070, in __init__
                  self.writer = _parquet.ParquetWriter(
                                ^^^^^^^^^^^^^^^^^^^^^^^
                File "pyarrow/_parquet.pyx", line 2363, in pyarrow._parquet.ParquetWriter.__cinit__
                File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
                File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
              pyarrow.lib.ArrowNotImplementedError: Cannot write struct type 'flags' with no child field to Parquet. Consider adding a dummy child field.
              
              During handling of the above exception, another exception occurred:
              
              Traceback (most recent call last):
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1608, in _prepare_split_single
                  num_examples, num_bytes = writer.finalize()
                                            ^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 684, in finalize
                  self.write_examples_on_file()
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 571, in write_examples_on_file
                  self.write_batch(batch_examples=batch_examples)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 661, in write_batch
                  self.write_table(pa_table, writer_batch_size)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 672, in write_table
                  self._build_writer(inferred_schema=pa_table.schema)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 713, in _build_writer
                  self.pa_writer = pq.ParquetWriter(
                                   ^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/pyarrow/parquet/core.py", line 1070, in __init__
                  self.writer = _parquet.ParquetWriter(
                                ^^^^^^^^^^^^^^^^^^^^^^^
                File "pyarrow/_parquet.pyx", line 2363, in pyarrow._parquet.ParquetWriter.__cinit__
                File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
                File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
              pyarrow.lib.ArrowNotImplementedError: Cannot write struct type 'flags' with no child field to Parquet. Consider adding a dummy child field.
              
              The above exception was the direct cause of the following exception:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1342, in compute_config_parquet_and_info_response
                  parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 907, in stream_convert_to_parquet
                  builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1438, in _prepare_split
                  for job_id, done, content in self._prepare_split_single(
                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1617, in _prepare_split_single
                  raise DatasetGenerationError("An error occurred while generating the dataset") from e
              datasets.exceptions.DatasetGenerationError: An error occurred while generating the dataset

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json
dict
jpg
image
txt
string
__key__
string
__url__
string
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the coal conveying trestle scenario, personnel are not wearing gloves, masks, or safety helmets,(...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/head_frame_000072/head_frame_000072
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"iVBORw0KGgoAAAANSUhEUgAAAtAAAAGVCAIAAABYSFGJAAAACXBIWXMAAA7EAAAOxAGVKw4bAAA(...TRUNCATED)
"In the coal conveying trestle scenario, there is a person lying on the ground. Therefore, the safet(...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/fall_frame_000004/fall_frame_000004
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the coal conveying trestle scenario, personnel are not wearing gloves, masks, or safety helmets,(...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/head_frame_000039/head_frame_000039
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the tunnel scenario, personnel are not wearing safety helmets and gloves, and there is an open f(...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/fire_frame_000079/fire_frame_000079
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
In the power scenario, there is an open flame. Therefore, the safety level is Grade One.
DATA_PATH/train/Annotations/Anomaly_data/fire_frame_000043/fire_frame_000043
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the oil and gas chemical scene, the potential hazards in the image include smoking, not wearing (...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/cigarette_frame_000027/cigarette_frame_000027
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the oil and gas chemical scenario, the potential hazards in the image are personnel smoking and (...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/cigarette_frame_000037/cigarette_frame_000037
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAIBAQEBAQIBAQECAgICAgQDAgICAgUEBAMEBgUGBgY(...TRUNCATED)
"In the tunnel scenario, there is a non-motorized vehicle occupying the motor vehicle lane. The safe(...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/nonautomobile_frame_000038/nonautomobile_frame_000038
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the coal conveying bridge scenario, personnel are not wearing masks or gloves. The safety level (...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/nonmask_frame_000065/nonmask_frame_000065
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
{"flags":{},"imageData":"/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0(...TRUNCATED)
"In the tunnel scenario, personnel are not wearing safety helmets and gloves. The safety level is gr(...TRUNCATED)
DATA_PATH/train/Annotations/Anomaly_data/head_frame_000096/head_frame_000096
hf://datasets/Tetrabot2026/InspecSafe-V1@6d58d012079ba6441c474be54d7a93dd9d70c01c/train.tar
End of preview.

InspecSafe-V1

Overview

InspecSafe-V1 is a high-quality, multimodal annotated dataset designed for world model construction and analysis in industrial environments. The data was collected from real-world inspection robots deployed across industrial sites and has been carefully cleaned and standardized for research and applications in predictive world modeling for industrial scenarios.

The dataset covers five representative industrial settings: tunnels, power facilities, sintering equipment, oil/gas/chemical plants, and coal conveyor galleries. It was constructed using data from 41 wheeled or rail-mounted inspection robots operating at 2,239 valid inspection waypoints. At each waypoint, eight synchronized modalities are provided:

  • Visible-light video
  • Infrared video
  • Audio
  • Depth point clouds
  • LiDAR point clouds
  • Gas concentration readings
  • Temperature
  • Humidity

Additionally, pixel-level polygonal segmentation annotations are provided for industrial objects in visible-light images. To support downstream tasks, each sample is also accompanied by a semantic scene description and a corresponding safety-level label based on real inspection protocols.

Dataset Format

The dataset is divided into a training set and a test set, both of which are organized in a structured directory layout with aligned multimodal streams and annotations. An overview of the data structure is shown below:

Annotations/
β”œβ”€β”€ Normal_data/
β”‚ └── 58132919741960_20251117_0.4kv_fadianjikongzhigui/
β”‚ β”œβ”€β”€ 58132919741960_20251117_0.4kv_fadianjikongzhigui_visible_2025111719_frame_000001.jpg # Normal visible image
β”‚ β”œβ”€β”€ 58132919741960_20251117_0.4kv_fadianjikongzhigui_visible_2025111719_frame_000001.json # Polygon segmentation annotation
β”‚ └── 58132919741960_20251117_0.4kv_fadianjikongzhigui_visible_2025111719_frame_000001.txt # Semantic scene description
β”‚
β”œβ”€β”€ Anomaly_data/
β”‚ └── hand_frame_000001/
β”‚ β”œβ”€β”€ hand_frame_000001.jpg # Anomaly visible image
β”‚ β”œβ”€β”€ hand_frame_000001.json # Annotation for anomaly
β”‚ └── hand_frame_000001.txt # Semantic description of anomaly
β”‚
β”œβ”€β”€ Other_modalities/
β”‚ └── 58132919741960_20251117_0.4kv_fadianjikongzhigui/
β”‚ β”œβ”€β”€ 0.4kv_fadianjikongzhigui_visible_2025103008.mp4 # RGB video
β”‚ β”œβ”€β”€ 0.4kv_fadianjikongzhigui_infrared_2025103008.mp4 # Infrared video
β”‚ β”œβ”€β”€ 0.4kv_fadianjikongzhigui_sensor_2025103008.txt # Gas, temperature, humidity logs
β”‚ β”œβ”€β”€ 0.4kv_fadianjikongzhigui_point_cloud_2025103008.bag # LiDAR/depth point cloud (ROS bag)
β”‚ └── 0.4kv_fadianjikongzhigui_audio_2025103008.wav # Audio recording
β”‚
└── Parameters/
└── Hardware/
β”œβ”€β”€ Device_A.json # Hardware specs for Device A
└── Device_B.json # Hardware specs for Device B

Notes:

  • File naming convention: {collection_robot_MAC_address}_{collection_time}_{point_name}.
  • Annotations:
    • .json: Contains pixel-level polygonal segmentation masks for industrial objects.
    • .txt: Contains human-readable semantic descriptions of the scene.
  • Other modalities:
    • Videos: .mp4 (RGB / IR)
    • Sensor logs: .txt (gas, temp, humidity)
    • Point clouds: .bag (ROS bag format)
    • Audio: .wav
  • Parameters: Includes extrinsic calibration, hardware specs, and software settings for accurate multimodal fusion.

This structure ensures synchronized access across all modalities and supports both supervised learning and world modeling tasks. Each sample metadata (e.g., robot ID, location, timestamp, safety label) is stored in JSON format. Segmentation masks are provided as PNG images with instance IDs matching the annotation JSON.

Data Splits

Split Number of Samples
train 3,763
test 1,250

Note: The dataset does not include a separate validation split; users are encouraged to create one from the training set as needed.

License

This dataset is released under the MIT License.

Acknowledgements

We thank the multimodal recognition algorithm team who contributed to data collection and annotation. This work was supported by TetraBOT.


For questions or contributions, please open an issue in the repository.

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