External IMU Motion Detection for Vehicle Screens
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Solution Overview
Problem
Traditional methods for detecting a mobile vehicle's motion status, such as attaching sensors and cables to gas and brake pedals, are time-consuming, may void warranties, and are often not allowed in leased vehicles, making it difficult to activate or deactivate vehicle screens effectively.
Innovation Solution
A motion detection device with an inertial measurement unit (IMU) that measures velocity, orientation, and gravitational forces using accelerometers, gyroscopes, and magnetometers, allowing for external attachment and real-time estimation of motion based on vibration frequency, enabling easier and cost-effective installation without voiding warranties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors and cables are attached to gas and brake pedals to detect motion, then motion detection accuracy is improved, but installation time increases and warranty may be voided
Solution Approach 1:
The patent extracts the motion detection function from the vehicle's internal systems (gas and brake pedals) and implements it through an external attachment device. The motion detection device includes an inertial measurement unit (IMU) that can be attached to the vehicle without modifying internal components, thereby reducing installation time while maintaining detection accuracy through alternative measurement approaches using accelerometers and gyroscopes.
Solution Approach 2:
The patent introduces an inertial measurement unit (IMU) as an intermediary device that measures motion parameters (acceleration, orientation, gravitational forces) without requiring direct attachment to gas or brake pedals. This intermediary approach allows motion detection through physical principles (inertial forces) rather than requiring connection to control mechanisms, thus reducing installation complexity and time.
2Adaptability or versatility
If sensors and cables are attached to gas and brake pedals to detect motion, then motion detection capability is improved, but device complexity increases
Solution Approach 1:
The patent extracts motion detection capability from complex internal vehicle systems and relocates it to an external, self-contained motion detection device. This device uses an IMU with accelerometers and gyroscopes that can independently measure motion without requiring integration with the vehicle's existing control systems, thereby maintaining detection capability while reducing overall system complexity.
Solution Approach 2:
The motion detection device is designed to be self-sufficient, using its own inertial measurement capabilities rather than relying on the vehicle's existing sensor systems. The device processes its own data from accelerometers and gyroscopes to determine motion state, eliminating the need for complex integration with gas or brake pedal systems and reducing installation complexity.
3Speed
If sensors and cables are attached to gas and brake pedals to detect motion, then real-time motion status detection is improved, but ease of installation deteriorates
Solution Approach 1:
The patent extracts real-time motion detection functionality from the vehicle's internal systems and implements it through an external motion detection device that processes data locally using an IMU. This approach maintains real-time detection capability while dramatically improving ease of installation, as the device can be attached without modifying internal systems or routing cables through the vehicle structure.
Solution Approach 2:
The patent replaces the mechanical connection approach (cables attached to gas and brake pedals) with an inertial measurement system that uses accelerometers and gyroscopes to detect motion through physical principles. This substitution eliminates the need for mechanical connections to control mechanisms, making installation easier while maintaining real-time detection capability through direct physical measurement of motion forces.
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 real-time detection of mobile vehicle motion, allowing screens to be deactivated during motion and activated when stationary, minimizing productivity disruption and avoiding warranty issues, with a solution that is easier and cheaper to install compared to traditional methods.
Implementation Method 1
an inertial measurement unit (IMU) configured to measure velocity, orientation, and gravitational forces of the motion detection device
Implementation Method 2
measurements from the IMU can include a filtered acceleration
Implementation Method 3
an inertial measurement unit (IMU) configured to measure velocity, orientation, and gravitational forces
Implementation Method 4
an inertial measurement unit (IMU) configured to measure velocity, orientation, and gravitational forces
Implementation Method 5
estimate motion of the mobile vehicle using the spectrum parameters, the IMU orientation parameters, measurements from the IMU, and a motion estimation function
Data Source
AI summary
Motion detection devices and systems are described herein. One motion detection device includes an inertial measurement unit (IMU) configured to measure velocity, orientation, and gravitational forces of the motion detection device and a computing component. The computing component can be configured to determine spectrum parameters of a mobile vehicle associated with the motion detection device using measurements from the IMU, determine IMU orientation parameters using measurements from the IMU, and estimate motion of the mobile vehicle using the spectrum parameters, the IMU orientation parameters, measurements from the IMU, and a motion estimation function.