Object Location Measuring Device Dynamic Sensitivity Control
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Solution Overview
Problem
Existing metal-locating devices face challenges in accurately detecting and differentiating between objects of varying sizes and depths due to large dynamic ranges in measurement signals, leading to overdrive issues and difficulty in precisely locating objects, especially when signals are either too weak or too strong.
Innovation Solution
The method generates output signals based on relative signal strength, allowing differentiation between 'object detected' and 'no object detected' states by defining percentage thresholds relative to previous signal maxima and minima, enabling precise location of objects by switching between these states without relying on exact signal intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor sensitivity is increased to detect objects at greater depths or with smaller signal strength, then the detection capability for weak signals is improved, but the measuring device becomes overdriven by strong signals from close objects, resulting in loss of precision
Solution Approach 1:
The patent applies dynamics by making the sensor sensitivity adjustable rather than fixed. The user can dynamically adapt the sensitivity setting based on the specific measurement situation and object characteristics, allowing the device to optimize its performance for each individual case rather than being locked into a single sensitivity level that compromises either weak signal detection or strong signal precision
Solution Approach 2:
The patent changes the parameter of sensor sensitivity from a fixed value to an adjustable parameter. By allowing users to modify the sensitivity setting, the system can adapt to different measurement conditions, ensuring that weak signals from deep or small objects can be detected without being overwhelmed by strong signals from close objects, thus resolving the contradiction between detection capability and location precision
2Adaptability or versatility
If a fixed high sensitivity setting is used to detect all objects regardless of size or depth, then objects of various sizes can be detected, but objects close together cannot be differentiated and located precisely
Solution Approach 1:
The patent makes the sensitivity setting dynamic and adaptable rather than fixed. Users can adjust the sensitivity level based on the specific measurement scenario, allowing the device to maintain high detection range when needed while achieving precise differentiation when objects are close together, eliminating the trade-off between versatility and precision
3Adaptability or versatility
If manual sensitivity adjustment is provided, then the user can optimize detection for specific conditions, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent applies local quality by providing sensitivity adjustment capability only where needed - through user control interfaces such as rotary potentiometers with associated rotating wheels. This localized control mechanism allows users to optimize sensitivity for specific measurement conditions without requiring complex automated adjustment systems throughout the entire device, thus balancing adaptability with acceptable complexity
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 allows for accurate detection and differentiation of objects, even when they are close together or at varying depths, by narrowing the measurement range and providing clear state indications, enhancing the precision of object location without requiring manual calibration or exact signal knowledge.
Implementation Method 1
These devices include inductive devices, i.e., devices that produce a magnetic field that is disturbed by the metallic objects enclosed in a medium
Implementation Method 2
With mains voltage detectors or AC detectors, only a receiving conductor loop system is used to detect the desired signal and, therefore, to locate an object
Data Source
AI summary
A method for locating objects enclosed in a medium, comprising the steps of generating a measurement signal correlated with an enclosed object; using the generated measurement signal to produce a signal which represents a difference between at least a first state which is “object detected” and at least a second state which is “no object detected”; switching from the first state “object detected” to the second state “no object detected” if a magnitude of the measurement signal being measured currently falls below a previously measured local maximum value of the measurement signal by a predefined first percentage.