Smartphone Metal Detector Using Audio Channels
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Solution Overview
Problem
Metal detectors are hindered by high production and maintenance costs, as well as physical volume and weight, limiting their application due to the need for costly, precise analog and digital circuits and complex production processes.
Innovation Solution
Repurposing compact sound recorder/player systems like MP3 players, cell phones, and laptops to energize transmitter coils and measure receiver coil signals for metal detection, utilizing their processing systems and actuators for signal processing and alarming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional metal detector systems are used, then detection accuracy is achieved, but device weight and volume increase significantly
Solution Approach 1:
The patent applies universality by using a smartphone as a multi-functional platform that combines audio output for coil energization, microphone input for signal reception, processing system for signal analysis, and display/vibrator for alarm functions. This eliminates the need for separate dedicated metal detector components, significantly reducing weight while maintaining detection accuracy through the smartphone's existing high-performance hardware.
2Measurement precision
If traditional metal detector systems are used, then detection accuracy is achieved, but production complexity and cost increase
Solution Approach 1:
The invention uses the smartphone's existing universal components (audio output, microphone, processor, display) to perform all metal detection functions, eliminating the need for specialized analog and digital circuits traditionally required in metal detectors. This universality dramatically simplifies production processes and reduces manufacturing costs while maintaining detection accuracy.
Solution Approach 2:
The patent replaces complex mechanical and electronic circuit systems with software-based processing on a smartphone platform. The signal processing, analysis, and control functions that traditionally required dedicated electronic circuits are now performed through software applications, reducing hardware complexity and production difficulty.
3Reliability
If traditional metal detector systems are used, then reliable detection is achieved, but maintenance cost increases
Solution Approach 1:
By using a smartphone as the core platform, the invention leverages the reliability of established mobile device hardware and software ecosystems. The universal nature of smartphone components means that repairs and maintenance can be performed using standard smartphone service procedures, eliminating the need for specialized maintenance of proprietary metal detector circuits and reducing overall maintenance costs.
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 creates a compact, cost-effective metal detector that reduces production complexity and weight, enabling precise metal detection and measurement while leveraging existing technology for signal processing and display.
Implementation Method 1
employ the output channel(s) of a wave or sound recorder/player devices to energize the transmitter coil(s) of an electromagnetic detector
Implementation Method 2
use the input or microphone input channel(s) of the sound player/recorder device to measure the signal of the receiver coil(s)
Data Source
AI summary
This invention presents a novel metal detector device and method that employs the performance of the current compact sound recorder/player systems such as Tape/CD/DVD players, MP3 players, Cell phones, Tablets, Laptops to make a compact metal detector. This invention also enables the use of said sound recorder/player systems for precise Vibration, Linear and Rotational Speed and Position Measurements.