On-board transmission and storage method suitable for inclined aerial remote sensing equipment

Abstract

The invention discloses an onboard transmission and storage method suitable for inclined aerial remote sensing equipment, and belongs to the technical field of aerial remote sensing. The airborne array adopts a full SSD disk, a ground downloading disk array selects a full mechanical hard disk (HDD) and an RAI D5 level as the core configuration of the disk array, the RAI D5 divides data into a plurality of small blocks, distributes and stores the small blocks on the plurality of hard disks in the array, adds parity check information on each hard disk, and adopts the RAI D5 level data-containing stripline storage, and the RAI D5 level data-containing stripline storage is carried out on the RAI D5 level data-containing stripline storage, so that the RAI D5 level data-containing stripline storage and the RAI D5 level data-containing stripline storage. Read-write operation is carried out on the multiple hard disks, parallel processing is achieved, and the data access speed is increased. According to the method, a large amount of data generated in unit time is acquired according to the requirement of live-action three-dimensional for the ground resolution of the image, onboard oblique aerial remote sensing data are effectively transmitted and stored, the onboard storage speed and storage safety of the oblique aerial photography system are improved, and therefore the working efficiency and the data safety are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aerial remote sensing, and relates to an on-board transmission and storage method suitable for tilted aerial remote sensing equipment. Background Art

[0002] The oblique aerial remote sensing system is a high-resolution, multi-angle aerial photography technology system. The system is usually carried on a flying platform, such as a helicopter or a drone. The system consists of multiple sensors (such as medium-format cameras) that can simultaneously collect images from different angles such as vertical and multiple side views. By shooting from multiple angles, it can make up for the shortcomings of vertical photography, obtain the side texture of the object in all directions, and reduce blind spots. The system integrates a high-precision attitude positioning system, which can obtain centimeter-level accuracy attitude position information to ensure the accuracy of the measurement results. Based on oblique images, using advanced positioning, fusion, modeling and other technologies, a real three-dimensional city model can be generated, providing strong support for urban planning, management and other fields.

[0003] Due to the multi-lens characteristics of the oblique aerial remote sensing system, a large amount of image data will be generated in a short period of time when shooting aerial images. The existing on-board storage of the oblique aerial remote sensing system in China uses on-board SSD storage to increase the storage speed for slightly higher-configuration systems, and the link connection commonly uses the traditional data transmission method of USB3.0 or USB3.2.

[0004] As the demand for real-life 3D image ground resolution becomes higher and higher and the area for acquiring data becomes larger and larger, the flight altitude must be lowered and the flight speed increased, resulting in an increasing amount of data generated per unit time. The storage capacity and storage characteristics of the onboard single-disk or multi-disk SSD can no longer meet the needs of existing tilt aviation missions, and traditional transmission methods also have shortcomings such as signal attenuation or unstable interfaces and unstable transmission. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and provides an on-board transmission and storage method suitable for tilted aerial remote sensing equipment.

[0006] The invention discloses an onboard transmission and storage method for oblique aerial remote sensing equipment, comprising the following steps: an onboard array adopts all SSD disks, a ground download disk array selects all mechanical hard disks (HDDs), and the RAID5 level is the core configuration of the disk array. RAID5 divides the data into multiple small blocks and stores them on multiple hard disks in the array, attaches parity information to each hard disk, adopts striped storage containing data at the RAID5 level, performs read and write operations on multiple hard disks, realizes parallel processing, transmits the image data through optical fiber connection, transmits the image data to the controller in real time through a switch, and the controller allocates a storage mechanism to store the remote sensing image data in the onboard disk array.

[0007] The advantages of the present invention are: it uses multi-link technology to greatly improve the reading and writing speed. This design not only significantly improves the overall performance of the system, but also demonstrates its advancement in the field of storage technology. At the same time, the array also has excellent seismic resistance, is specially designed for aviation environments, and can maintain stable operation under strong vibration conditions, ensuring data integrity and system reliability, further highlighting its technological leadership.

[0008] The present invention aims at the demand of real-scene three-dimensional for image ground resolution, obtains a large amount of data generated per unit time, effectively transmits and stores on-board oblique aerial remote sensing data, improves the on-board storage speed and storage security of the oblique aerial photography system, and thus effectively improves work efficiency and data security.

[0009] The present invention adopts a dual-channel transmission mechanism of optical fiber cables and switches, which greatly improves the speed and reliability of data transmission, significantly enhances the anti-interference performance of the system, and ensures accurate data transmission; at the same time, the long life of optical fiber cables effectively reduces the frequency of cable replacement and maintenance, thereby saving costs; the present invention reserves sufficient potential for later upgrades to ensure that the aerial camera can flexibly adapt to future increases in data transmission needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the figure:

[0011] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] Embodiment 1: An onboard transmission and storage method for tilted aerial remote sensing equipment, comprising the following steps:

[0014] Step 1: The tilt aerial remote sensing system takes 5 aerial images in five directions at an interval of 0.5 seconds at the fastest. After the coordinate information of these aerial images is written, they are transmitted to the switch through the optical fiber port connected to each camera.

[0015] Step 2: Transmit to the controller through the switch. The controller controls the camera exposure and transmission center. The controller is responsible for data inspection and attribute editing.

[0016] Step 3: After being processed by the controller, the data is transmitted to the onboard disk array via dual-link optical fiber.

[0017] Step 4: After the aircraft lands, the onboard disk array is retrieved to the base, connected to the ground download disk array, and the data on the onboard disk array is transferred to the ground download disk array, and the data is backed up and processed through the ground download disk array.

[0018] Embodiment 2: An on-board transmission and storage method suitable for tilted aerial remote sensing equipment comprises a step of rapidly rebuilding lost data, a step of hot plugging, a step of hardware redundancy, a step of on-board data transmission, and a step of on-board data transmission and storage connection.

[0019] Rapidly rebuild lost data steps: When a hard drive in the array fails, the system uses the data blocks and parity information on the remaining hard drives to quickly rebuild the lost data, thereby ensuring data integrity and security and avoiding data loss due to hard drive failure.

[0020] Hot-swap procedure: When the system detects that a disk needs maintenance or replacement, the administrator can directly unplug the failed disk and insert a new or spare disk without shutting down the entire system or interrupting service.

[0021] The disk array system includes data redundancy steps and hardware redundancy steps. The data redundancy step is implemented through RAID technology, which stores data on multiple disks in a dispersed manner and adds verification information so that data can be recovered when a disk fails.

[0022] Hardware redundancy steps include using additional disks as hot spares. Once a primary disk failure is detected, the hot spare immediately takes over its work to ensure that data access is not affected.

[0023] Onboard data transmission steps: Single-mode optical fiber is used to support ultra-long distance, high-bandwidth data transmission. At the same time, armored optical fiber cables are selected to enhance the mechanical strength and anti-environmental interference capabilities of the optical fiber, ensuring the stability and reliability of data transmission under various harsh conditions.

[0024] In the transmission architecture, all oblique aerial remote sensing cameras are directly connected to high-performance fiber optic switches via fiber optic cables, utilizing the high bandwidth and low latency characteristics of optical fiber to achieve high-speed and stable transmission of camera data.

[0025] Fiber optic switches serve as data transfer stations, ensuring fast data forwarding and routing.

[0026] To enhance data reliability and redundancy, the fiber optic switch transmits data redundantly to the controller via two independent fiber optic lines.

[0027] The controller is connected to a portable onboard disk array as the core of data storage. It is equipped with large-capacity storage devices and efficient data management software, which can quickly process, store and manage the received data to ensure the integrity and security of the data.

[0028] In the onboard data transmission and storage connection steps, multiple oblique cameras are connected via optical fiber, and a large amount of image data is transmitted to the controller in real time through the switch. The controller allocates the storage mechanism and stores a large amount of remote sensing image data to the onboard disk array, thereby realizing the function of rapid data storage.

[0029] The oblique aerial remote sensing system has shown significant advantages in scalability and flexibility after adopting disk arrays. The disk array supports hot-swappable technology, which means that hard disks can be easily added or replaced without shutting down the system, thereby quickly expanding storage capacity. This flexibility is crucial for aerial cameras that need to process large amounts of aerial data, because it allows operators to dynamically adjust storage resources according to actual needs, avoiding operational interruptions caused by insufficient storage capacity. In addition, the disk array also supports multiple RAID level configurations, and operators can choose the appropriate RAID level based on data security and performance requirements, further enhancing the flexibility of the system.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An onboard transmission and storage method for tilted aerial remote sensing equipment, characterized in that: The following steps are included: the airborne array uses all SSD disks, the ground download disk array uses all mechanical hard disks (HDD), and the RAID5 level is the core configuration of the disk array. RAID5 divides the data into multiple small blocks and distributes them on multiple hard disks in the array, attaches parity information to each hard disk, uses RAID5 level to store striped data, performs read and write operations on multiple hard disks, realizes parallel processing, and transmits the image data through optical fiber connection. The image data is transmitted to the controller in real time through the switch, and the controller allocates the storage mechanism to store the remote sensing image data in the airborne disk array.

2. The on-board transmission and storage method for tilted aerial remote sensing equipment according to claim 1, characterized in that: It also contains the following steps: Step 1: The tilt aerial remote sensing system takes 5 aerial images in five directions at an interval of 0.5 seconds at the fastest. After the coordinate information of these aerial images is written, they are transmitted to the switch through the optical fiber port connected to each camera. Step 2: Transmit to the controller through the switch. The controller controls the camera exposure and transmission center. The controller is responsible for data inspection and attribute editing. Step 3: After being processed by the controller, it is transmitted to the onboard disk array via dual-link optical fiber. Step 4: After the aircraft lands, the onboard disk array is retrieved to the base, connected to the ground download disk array, and the data on the onboard disk array is transferred to the ground download disk array, and the data is backed up and processed through the ground download disk array.

3. The on-board transmission and storage method for tilted aerial remote sensing equipment according to claim 1, characterized in that: Contains steps for quickly rebuilding lost data, hot-swap steps, hardware redundancy steps, onboard data transfer steps, and onboard data transfer storage connection steps. Rapidly rebuild lost data steps. When a hard drive in the array fails, the system uses the data blocks and parity information on the remaining hard drives to quickly rebuild the lost data. Hot-swap procedure, when the system detects that a disk needs maintenance or replacement, the administrator directly unplugs the failed disk and inserts a new or spare disk without shutting down the entire system or interrupting service.

4. The on-board transmission and storage method for tilted aerial remote sensing equipment according to claim 3, characterized in that: It also includes data redundancy steps and hardware redundancy steps. The data redundancy step uses RAID to store data on multiple disks and add verification information to recover data when a disk fails. Hardware redundancy steps include using an additional disk as a hot spare. When a primary disk failure is detected, the hot spare immediately takes over its work to ensure that data access is not affected. Onboard data transmission steps: Use single-mode optical fiber to support ultra-long distance, high-bandwidth data transmission, and use armored optical fiber cables. In the onboard data transmission and storage connection steps, multiple oblique cameras are connected via optical fiber, and a large amount of image data is transmitted to the controller in real time through the switch. The controller allocates the storage mechanism and stores a large amount of remote sensing image data to the onboard disk array, thereby realizing the function of rapid data storage.

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