Sensor Intermediate Part Jumper Wire Signal Adjustment
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Solution Overview
Problem
In electric current sensors using magnetic detection elements like Hall ICs, it is challenging to maintain stable output signal properties due to variance in magnetic permeability and position/sizing of magnetic circuits, and adjusting these properties post-assembly is difficult, especially when high-capacitance capacitors affect signal waveforms.
Innovation Solution
A sensor intermediate part with a physical quantity detection element, a high-capacitance capacitor, and a jumper wire configuration that allows the power source terminal and second terminal to be electrically connected via the jumper wire, preventing capacitor interference and enabling stable adjustment of output signal properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high-capacitance capacitor is provided between the power source terminal and ground terminal to ensure stable operation during power source voltage changes, then the sensor can maintain stable operation under voltage fluctuations, but the capacitor deforms the signal waveform when write signals or synchronization signals are input during adjustment, making it difficult to adjust output signal properties
Solution Approach 1:
The patent divides the connection between the power source terminal and the capacitor into two separate connection steps. First, the magnetic detection element is mounted and adjusted while the capacitor connection is incomplete (jumper wire not yet connected). After adjustment is complete, the jumper wire is connected to establish the capacitor connection. This segmentation allows the adjustment phase to occur without capacitor interference while still providing voltage stabilization capability in the final product.
Solution Approach 2:
The patent performs the adjustment of output signal properties before connecting the capacitor to the power source terminal. By completing the adjustment process in advance while the capacitor connection is still open (via the unconnected jumper wire), the system avoids the waveform deformation that would occur during adjustment. The capacitor is then connected to provide its stabilizing function for normal operation.
2Manufacturing precision
If the properties of output signals are adjusted in the intermediate parts after assembly to obtain desired output signals, then the output signal properties can be tuned to specifications, but variance in magnetic permeability and position/size of magnetic circuit makes it difficult to achieve desired output signal properties even with pre-adjusted magnetic detection elements
Solution Approach 1:
The patent introduces a jumper wire as an intermediary element that controls the connection state between the power source terminal and the capacitor. This simple intermediary component enables the system to transition between two states: an adjustment state where the capacitor is disconnected (allowing precise signal adjustment without waveform deformation) and an operation state where the capacitor is connected (providing voltage stabilization). The jumper wire mediates between the conflicting requirements of adjustment precision and operational stability.
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 configuration allows for stable adjustment and output of signal properties in electric current sensors, ensuring consistent performance even with varying power source voltages, thereby improving sensor reliability and manufacturing yield.
Implementation Method 1
a high-capacitance capacitor, which has at least a first terminal and a second terminal
Implementation Method 2
an electric current sensor that uses a magnetic detection element such as a Hall IC to measure input and output electric current
Data Source
AI summary
A sensor intermediate part is provided with a physical quantity detection element that has a power source terminal, a ground terminal and an output terminal that outputs a desired output signal, where the physical quantity detection element is capable of adjusting properties of the output signal; a high-capacitance capacitor, which has at least a first terminal and a second terminal, and a jumper wire, one end of which is conducted to either the power source terminal or the second terminal and the other end of which is not conducted. The first terminal is conducted to the ground terminal, and the power source terminal and the second terminal are configured to be electrically connectable by the jumper wire.