Magnetic Sensor Circuit Time Division Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing magnetic sensor circuits face a delay in detection speed when detecting magnetic fields applied for tampering, particularly when multiple axes are involved, leading to increased maximum output delay time periods and reduced noise suppression effectiveness.
Innovation Solution
A magnetic sensor circuit configuration that includes multiple detection axes subjected to time division processing, utilizing a magnetic detector, switching circuit, comparator, and control circuit to determine magnetic field detection based on signal levels and successively received result signals, allowing for reduced delay time periods without compromising noise suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of detection axes is increased to detect magnetic fields from multiple directions, then the coverage and reliability of tampering detection is improved, but the maximum output delay time period is remarkably increased
Solution Approach 1:
The patent divides the detection system into multiple independent detection axes (x-axis, y-axis, z-axis), each with its own signal processing path. By segmenting the detection task across multiple axes that can operate in parallel, the system maintains comprehensive detection coverage while reducing the delay caused by sequential processing. Each axis processes signals independently, allowing simultaneous detection across all directions.
2Reliability
If the number of times of matching determination is increased to suppress noise, then the noise suppressing effect is improved, but the maximum output delay time period is increased
Solution Approach 1:
The patent implements preliminary action by performing matching determination a predetermined number of times for each detection axis before final output. This preliminary repeated verification ensures noise suppression while the parallel architecture allows these operations to occur simultaneously across multiple axes, preventing the accumulation of delay time that would occur in sequential processing.
3Use of energy by moving object
If the magnetic sensor circuit is driven intermittently to reduce power consumption, then the energy efficiency is improved, but the detection speed is reduced
Solution Approach 1:
The patent maintains continuous operation of the magnetic sensor circuit to ensure rapid detection of tampering magnetic fields. The parallel processing architecture across multiple detection axes allows the system to remain continuously active without excessive power consumption, as each axis operates independently and simultaneously, maximizing detection speed while managing energy usage efficiently.
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 proposed configuration reduces the maximum output delay time period by half while maintaining effective noise suppression, enhancing the responsiveness and repeatability of magnetic field detection across multiple axes.
Implementation Method 1
a magnetic sensor circuit configured to subject a first detection signal corresponding to a magnetic field in a first direction and a second detection signal corresponding to a magnetic field in a second direction to time division processing
Data Source
AI summary
Provided is a magnetic sensor circuit in which increase of a delay time period is suppressed to be small without reducing a noise suppressing effect, in a case where there are multiple magnetic field detection axes. A magnetic sensor circuit is configured to subject detection signals obtained from multiple magnetic-field detection axes to time division processing, and includes a magnetic detector including at least two magnetic sensors, a switching circuit selecting a magnetic sensor represented by a selection signal to transmit the detection signal, a comparator, a control circuit, and output terminals. The control circuit supplies the selection signal to the switching circuit, and determines that the magnetic field is detected in a case where the number of times that a signal level of the signal supplied from the switching circuit exceeds a reference level reaches the number of set times that is set to a plurality of times.