Motion Detection System with Determination Radio Wave
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motion detection systems with multiple gesture recognition devices face inefficiencies due to unnecessary power consumption and reduced accuracy caused by radiation of radio waves in unintended directions, leading to wasteful energy use and impaired gesture recognition.
Innovation Solution
A motion detection system that employs a determination radio wave to assess the position of each radar module, allowing only the necessary modules to enter a motion detection state and setting others to low power consumption states, thereby optimizing power usage and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple gesture recognition devices are used to increase the number of recognizable gestures and improve recognition rate, then the versatility and recognition accuracy are improved, but the power consumption increases due to unnecessary radio wave transmission from all devices
Solution Approach 1:
The system performs a preliminary determination by transmitting a determination radio wave from one device to another before actual gesture detection. This preliminary action allows the system to assess whether the other device is in a suitable position and orientation to contribute to gesture recognition, thereby deciding whether to activate it for actual detection operations.
Solution Approach 2:
The system dynamically adjusts the operational state of multiple gesture recognition devices based on real-time position assessment. Devices switch between active and low-power states according to whether they are needed for the current detection task, optimizing the balance between recognition versatility and power consumption.
2Measurement precision
If multiple gesture recognition devices transmit radio waves simultaneously to improve detection coverage, then the measurement precision is improved, but the loss of energy increases due to redundant transmission
Solution Approach 1:
Before initiating full gesture detection, the system transmits a determination radio wave to assess the positional relationship between devices. This preliminary assessment determines whether each device should participate in actual gesture detection, preventing energy waste from redundant transmissions while maintaining measurement precision through selective activation.
Solution Approach 2:
The system uses a lightweight determination radio wave transmission instead of full gesture detection transmission for all devices. This partial action (determination transmission) is performed by all devices to assess suitability, but full detection transmission is performed only by necessary devices, reducing overall energy loss while maintaining sufficient measurement precision.
3Reliability
If all radar modules remain active to ensure continuous detection, then the reliability is improved, but the use of energy increases unnecessarily
Solution Approach 1:
The system performs a preliminary position assessment using determination radio waves before activating full detection mode. This allows the system to maintain reliability by activating only the necessary devices for continuous detection, rather than keeping all devices permanently active, thereby reducing unnecessary energy consumption.
Solution Approach 2:
The system changes the operational parameter of radar modules from a static 'always active' state to a dynamic state that adjusts based on position assessment results. Modules transition between active and low-power states according to whether they are needed for maintaining detection reliability, optimizing the balance between reliability and energy usage.
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
This approach reduces power consumption, extends operating time, and enhances gesture detection accuracy by ensuring that only relevant radar modules are active during gesture recognition, preventing unnecessary radio wave transmission and improving the system's overall performance.
Implementation Method 1
a first motion detection device configured to detect a motion of an object based on a reflected wave of a radio wave transmitted by a first radio wave sensor
Data Source
AI summary
A motion detection system includes a first motion detection device that detects a motion of an object based on a reflected wave of a radio wave transmitted by a first radio wave sensor, the first motion detection device including the first radio wave sensor, and a second motion detection device that detects the motion based on a reflected wave of a radio wave transmitted by a second radio wave sensor, the second motion detection device including the second radio wave sensor, wherein one motion detection device among the first and second motion detection devices transmits a determination radio wave and another motion detection device among the first and second motion detection devices receives the determination radio wave, and wherein only the first motion detection device is used to detect the motion when received intensity of the received determination radio wave is smaller than a predetermined threshold.