Remote Camera Control via Gyroscopic Virtual Gimbal

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Solution Overview

Problem

Current remote control systems for camera gimbals require skilled operators to achieve precise control, are prone to jitter, and often produce discontinuous movements, leading to suboptimal video quality.

Innovation Solution

A remote control device with a steering member that allows intuitive control of camera angles via rotational movements, using an inertial measurement unit to provide precise updates to the stabilization system, and video feedback for accurate framing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a joystick is used for remote control of the camera gimbal, then the remote operator can control the camera pointing angle, but the control requires substantial practice and training to achieve precision and smoothness

Engineering Contradiction:
Improveease of camera controlVSAvoidprecision of camera pointing
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The patent uses a gyroscope to create a virtual copy of the gimbal's physical state and behavior in the remote control interface. This virtual gimbal replicates the actual gimbal's inertia, center of gravity, and response characteristics, allowing the remote operator to control it intuitively as if physically present, eliminating the need for extensive training while maintaining precise control.

Inventive Principle:
Principle #26Copying

2Speed

If joystick sensitivity is calibrated for fast slew rates, then fast movements are controlled smoothly, but slow movements produce unintentional jitter

Engineering Contradiction:
Improveslew rate controlVSAvoidfootage quality
Core Design Contradiction:
SpeedVSReliability

Solution Approach 1:

The patent implements dynamic sensitivity adjustment where the remote control's response characteristics automatically adapt to the current gimbal state. The system adjusts sensitivity and filtering parameters in real-time based on whether the gimbal is in fast or slow movement, ensuring smooth control across all speeds without producing jitter in the captured footage.

Inventive Principle:
Principle #15Dynamics

3Device complexity

If a joystick sensor with limited resolution is used, then the device complexity is reduced, but discontinuous steps appear when commanding pointing angle changes

Engineering Contradiction:
Improveremote control device complexityVSAvoidsmoothness of camera movement
Core Design Contradiction:
Device complexityVSStability of the object's composition

Solution Approach 1:

The patent employs feedback from the gyroscope to detect actual gimbal movement and compares it with commanded movements. When discontinuous steps occur due to limited joystick resolution, the system detects the discrepancy and automatically generates corrective commands to smooth out the motion, ensuring continuous and stable camera pointing without requiring high-resolution sensors.

Inventive Principle:
Principle #23Feedback

4Speed

If the remote operator directly controls the gimbal pointing, then the control responsiveness is improved, but motion tremor increases due to operator instability

Engineering Contradiction:
Improvecontrol responsivenessVSAvoidfootage quality
Core Design Contradiction:
SpeedVSReliability

Solution Approach 1:

The patent introduces the gyroscope as an intermediary between the remote operator and the gimbal. The gyroscope measures the actual gimbal state and provides feedback to the control algorithm, which then generates smoothed control commands. This intermediary layer filters out high-frequency tremors from operator movements while preserving the intended pointing direction, maintaining responsiveness without compromising footage quality.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Enables high-quality footage with reduced motion tremor and no calibration required, allowing less skilled operators to perform precise and smooth motions with improved control over camera gimbals.

Implementation Method 1

an inertial measurement unit to provide precise updates to the stabilization system

Methodology Applied
Scientific EffectInertial measurement: Accelerometer

Data Source

PatentUS9900511B2Method, system, and device for controlling a stabilized camera remotely
Publication Date: 2018.02.20 ARASHI VISION INC
  • US9900511B2 patent drawing
  • US9900511B2 patent drawing
  • US9900511B2 patent drawing

AI summary

A remote control device, method, and system for controlling a stabilized camera remotely are disclosed. The remote control device includes a steering member rotatable around a pan axis, a tilt axis, and/or a roll axis of the remote control device, an inertial measurement unit (IMU) mounted on the steering member and configured to measure a pointing direction of the steering member in relation to the pan axis, the tilt axis, and/or the roll axis, a controller configured to derive a pointing direction update based on the measurements obtained by the IMU, and a transmitter configured to transmit, to a stabilization system configured to stabilize the camera in accordance with a commanded pointing direction, the derived pointing direction update as the commanded pointing direction to effectuate adjustment of a pointing direction of the camera to follow a rotational movement of the steering member.