Capacitive Radar Detection Device for 3D Position Tracking
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Solution Overview
Problem
Conventional capacitive sense pads used in VR and AR applications have limited detection accuracy, which degrades overall performance.
Innovation Solution
A detection device comprising capacitive sensors, transmission and reception antennas, a radar module, and a processor, which detects human body information in multiple directions, enhancing accuracy by combining capacitive and radar data on a multilayer circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional capacitive sense pads are used for detection, then the device structure remains simple, but the detection accuracy is limited and degrades overall performance
Solution Approach 1:
The patent combines capacitive sensors and radar detection components into a single integrated detection device. The capacitive sensors detect horizontal position information while the radar module detects vertical position information, merging two different detection technologies into one unified system that improves overall detection accuracy without requiring separate devices
Solution Approach 2:
The detection device is designed to perform multiple detection functions simultaneously - it can detect both horizontal and vertical position information of the human body portion using different sensing mechanisms. This multi-functional approach allows a single device to replace what would otherwise require multiple separate detection components
2Measurement precision
If dual-detection capabilities in horizontal and vertical directions are implemented, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extends detection from a single horizontal dimension to three-dimensional space by adding vertical direction detection capability through radar. The capacitive sensors operate in the horizontal plane while the radar module adds the vertical dimension, creating comprehensive 3D detection capability that significantly improves accuracy for VR/AR applications
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 device achieves improved detection accuracy by providing dual-detection capabilities in both horizontal and vertical directions, enhancing overall performance in VR and AR applications.
Implementation Method 1
A plurality of capacitive sensors detect first information of the human body portion in a first direction, and detect second information of the human body portion in a second direction
Implementation Method 2
The radar module uses the transmission antenna to transmit a radar signal to the human body portion. The radar module uses the reception antenna to receive a reflection signal from the human body portion
Implementation Method 3
The radar module uses the reception antenna to receive a reflection signal from the human body portion
Data Source
AI summary
A detection device includes a plurality of capacitive sensors, a transmission antenna, a reception antenna, a radar module, a carrier module, and a processor. The capacitive sensors detect first information of a human body portion in a first direction, and detect second information of the human body portion in a second direction. The radar module uses the transmission antenna to transmit a radar signal to the human body portion. The radar module uses the reception antenna to receive a reflection signal from the human body portion. The radar module detects third information of the human body portion in a third direction according to the reflection signal. The capacitive sensors, the transmission antenna, and the reception antenna are disposed on the carrier element. The processor estimates status information of the human body portion according to the first information, the second information, and the third information.