Digital Sight Azimuth Measurement Using Sensor Fusion
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Solution Overview
Problem
Current azimuth angle measurement techniques for hand-carried projectile-firing devices are limited by high cost, low precision, and environmental interference, particularly when using single gyroscopes or inertial navigation systems, which are expensive and cumbersome.
Innovation Solution
A digital sight system incorporating a single medium-low level gyroscope, an accelerometer module, and a geomagnetic sensor, combined with a manual rotation device, to reduce estimation errors and improve precision through multi-position estimation techniques and minimal electronic equipment usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an inertial navigation device is used to measure azimuth angle, then measurement precision is improved, but weight and volume increase making it unsuitable for hand-carried weapon systems
Solution Approach 1:
The patent segments the inertial navigation device into a minimal configuration using only one or two gyroscopes instead of three, and combines them with an accelerometer and magnetic sensor. This segmentation allows the system to achieve sufficient azimuth measurement precision while reducing weight and volume for hand-carried weapon systems.
Solution Approach 2:
The patent merges multiple sensor types (gyroscope, accelerometer, magnetic sensor) into a single integrated azimuth measurement system. This combination allows the system to achieve inertial navigation-level precision without the full weight and complexity of a complete inertial navigation device, making it suitable for hand-carried applications.
2Measurement precision
If a gyroscope is used to obtain desired precision in azimuth angle measurement, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent combines a gyroscope with an accelerometer and magnetic sensor to create an integrated azimuth measurement system. This merging allows the use of a lower-cost gyroscope while achieving the desired measurement precision through the complementary information provided by the other sensors, thereby reducing overall equipment cost.
Solution Approach 2:
The patent introduces an intermediary computational process that uses data from the gyroscope, accelerometer, and magnetic sensor together to calculate azimuth angle. This intermediary calculation method allows the system to achieve high precision without requiring an expensive high-performance gyroscope alone, thus reducing cost while maintaining precision.
3Measurement precision
If GPS is used to obtain azimuth angle, then measurement capability is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The patent merges the gyroscope, accelerometer, and magnetic sensor into a single self-contained azimuth measurement unit that operates independently of external satellite systems. This integration improves measurement capability while reducing device complexity compared to GPS-based solutions that require additional receivers and complex signal processing.
Solution Approach 2:
The patent creates a self-service azimuth measurement system that uses its own onboard sensors (gyroscope, accelerometer, magnetic sensor) to determine azimuth angle without requiring external satellite signals or additional navigation receivers. This self-contained approach reduces operational difficulty and device complexity while maintaining measurement capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables precise and cost-effective azimuth angle measurement, reducing estimation errors and improving operability while protecting core components from environmental extremes.
Implementation Method 1
the inertial sensor package (200) includes a gyroscope (210)
Implementation Method 2
an accelerometer module (220)
Implementation Method 3
a geomagnetic sensor
Data Source
AI summary
The present invention relates to a digital sight for a hand-carried projectile-firing device and a method of controlling the digital sight. A digital sight for a hand-carried projectile-firing device according to an embodiment of the present invention is a digital sight for a hand-carried projectile-firing device, the digital sight including an inertial sensor package and a manual rotation device, wherein the inertial sensor package includes a gyroscope and an accelerometer module. In accordance with the present invention, equipment for measuring the firing direction of a hand-carried projectile-firing device such as a mortar is replaced with a digital sight for a hand-carried projectile-firing device, which reduces an estimation error while using a single medium-low level gyroscope, thus enabling the projectile-firing device to precisely and promptly fire a projectile and improving the operability thereof.