Obscured Feature Detector with Dynamic Surface Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing obscured feature detectors face challenges in accurately locating beams and studs behind walls and joists due to limitations in sensing through various surface materials and thicknesses, and are often influenced by the presence of metallic fasteners or require skilled user judgment.
Innovation Solution
An advanced obscured feature detector with a group of sensor plates, a multi-layer printed circuit board, and improved shielding, which maintains uniform electric field lines and self-adjusts to surface conditions, allowing for accurate detection through different materials and thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electronic detectors are used to sense changes in capacitance, then detection of obscured features is enabled, but accuracy deteriorates due to inability to compensate for surface thickness and density variations
Solution Approach 1:
The detector automatically adjusts its sensing parameters and calibration based on the detected surface thickness and density, transitioning from a static detection threshold to a dynamic adaptation system that optimizes detection accuracy for each specific surface condition
Solution Approach 2:
The system changes its operational parameters (capacitance thresholds, sensing frequency, calibration factors) based on the measured surface properties, allowing accurate detection across varying surface thicknesses and densities by adjusting detection parameters rather than using fixed thresholds
2Reliability
If magnetic detectors are used to find obscured support elements, then detection is enabled through metallic fasteners, but detection reliability deteriorates when fasteners are spaced at discrete locations causing gaps in detection
Solution Approach 1:
The patent replaces the mechanical contact-based detection (tapping) and magnetic field detection with capacitance sensing that can detect changes in electrical field distribution, providing continuous coverage without relying on discrete fastener locations or physical contact points
3Measurement precision
If rudimentary techniques such as driving pilot nails are used to locate support elements, then location information is obtained, but ease of operation deteriorates due to destructive nature and skill requirements
Solution Approach 1:
The detector performs automatic calibration and detection without requiring user intervention for skill-based judgments, with the device self-adjusting to surface conditions and providing clear visual or digital output that eliminates the need for expert interpretation of tactile or auditory signals
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 detector provides reliable and accurate readings, reducing surface-thickness-induced errors and enabling deeper detection of obscured features across various surfaces with improved ease of use and reduced reliance on user skill.
Implementation Method 1
These detectors sense changes in capacitance on the examined surface that result from the presence of features positioned behind, beneath or within the surface
Implementation Method 2
An advanced obscured feature detector with a group of sensor plates, a multi-layer printed circuit board, and improved shielding, which maintains uniform electric field lines
Data Source
AI summary
An obscured feature detector can include a plurality of sensor plates and a common plate. The sensor plates may be arranged linearly to form a sensor array. The common plate may extend along the sensor array and have a length that is shortened. An end sensor plate at an end of the sensor array has a smaller area than a non-end sensor plate that is not at the end of the sensor array. A controller coupled to the sensing circuit can analyze the capacitances measured by the sensing circuit. One or more indicators are coupled to the controller, and each can be selectively set to identify a location of an obscured feature behind a surface, or otherwise indicate variances of capacitance measurements along the sensor array. Other disclosed obscured feature detectors include a plurality of sensor plates arranged radially around a center point.