Solenoid Plunger Motion Detection via Digital Current Analysis
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Solution Overview
Problem
Current detection technologies for electric solenoid motion attributes are expensive, consume high power, and lack configurability, failing to meet the demands of cost reduction, power efficiency, and adaptability in competitive industrial environments.
Innovation Solution
A detection system utilizing a current sensor, current comparator, up/down counter, and digital-to-analog converter to track and convert current into digital signals, allowing for digital domain processing of peak and trough differences to detect solenoid plunger motion, reducing power consumption and design complexity while enhancing configurability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection mechanisms using op-amps, comparators, and active peak detectors are used, then detection functionality is achieved, but cost and power consumption increase significantly
Solution Approach 1:
The patent replaces traditional analog electronic detection mechanisms (op-amps, comparators, active peak detectors) with a digital detection system that uses a current sensor, counter, and digital signal processing. This substitution of analog electronics with digital processing reduces power consumption while maintaining detection accuracy for solenoid plunger motion attributes.
Solution Approach 2:
The patent changes the detection approach by monitoring current parameters through a current sensor and processing them digitally via a counter and comparator. Instead of using analog peak detectors, the system converts current signals to digital form and detects plunger motion through digital comparison of current values at different time points, reducing power requirements while preserving measurement precision.
2Measurement precision
If traditional detection mechanisms using op-amps, comparators, and active peak detectors are used, then detection functionality is achieved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex analog circuitry (op-amps, comparators, active peak detectors) with a simplified digital system comprising a current sensor, counter, and digital comparator. This substitution reduces device complexity by eliminating multiple analog components while maintaining the ability to detect solenoid plunger motion attributes accurately.
Solution Approach 2:
The digital counter and comparator in the patent serve multiple functions: they detect peak current values, determine plunger motion status, and provide configurable detection thresholds. This multi-functionality reduces the overall number of components needed compared to traditional analog detection systems, simplifying the device while preserving measurement precision.
3Measurement precision
If traditional detection mechanisms are used, then detection capability is provided, but configurability is limited
Solution Approach 1:
The patent implements a configurable detection system where the comparator threshold and detection parameters can be adjusted based on different solenoid applications. The digital architecture allows dynamic reconfiguration of detection criteria, enabling the same hardware to adapt to various motion detection requirements while maintaining measurement precision through programmable parameters.
4Reliability
If accurate solenoid plunger motion detection is implemented, then fault detection capability is improved, but system cost and power requirements increase
Solution Approach 1:
The patent replaces power-intensive analog detection circuits with a low-power digital system that achieves the same fault detection accuracy. The current sensor combined with digital counter and comparator provides reliable plunger motion detection while consuming significantly less power than traditional analog mechanisms, enabling accurate fault detection in cost-sensitive and power-constrained 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 system provides accurate, affordable, and highly configurable detection of solenoid motion attributes with significantly lower power requirements, enabling prompt fault detection in industries like manufacturing, healthcare, and automotive, thereby reducing production risks and costs.
Implementation Method 1
The coils behave like an electromagnet and the plunger, which is located inside the coil, is attracted towards the center of the coil by the magnetic flux setup within the coils
Implementation Method 2
The coils behave like an electromagnet and the plunger, which is located inside the coil, is attracted towards the center of the coil by the magnetic flux setup within the coils
Data Source
AI summary
A solenoid plunger movement detection system and method can include: detecting current supplied to a solenoid with a current sensor; converting the current supplied to the solenoid into a digital signal with a counter coupled to a first comparator; detecting a peak within the digital signal with a peak detector; comparing the peak to the digital signal with a second comparator coupled to the peak detector; measuring a dip from the peak and measuring a trough with the second comparator; generating a fault when the peak and the trough indicate a smooth current ramp to the solenoid; receiving configurable parameters for processing the digital signal with a signal processor; and providing configurable parameters to the counter, the second comparator, the signal processor, or a combination thereof with an interface.