Voltage Detection Apparatus With Differential Line Abnormality Check
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Solution Overview
Problem
Existing power source voltage detection apparatuses fail to accurately and reliably detect power source voltage when there is a wiring abnormality, such as grounding or wire disconnection, between the direct current power source and the voltage detector.
Innovation Solution
A power source voltage detection apparatus that includes a reference voltage generator, a standard voltage generator, a differential amplifier, and an abnormality detector, which differentially amplifies the power source reference voltage and standard voltage to detect abnormalities in the transmission lines, allowing for accurate detection of power source voltage and line abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple voltage detection configuration is used, then device complexity is reduced, but reliability of power source voltage detection deteriorates when wiring abnormalities occur
Solution Approach 1:
The patent applies preliminary action by introducing a preliminary check mechanism before the main voltage detection. The abnormality detection unit first checks whether the transmission line is normal by comparing the detected voltage with the expected voltage range. Only when the transmission line is confirmed normal does the system proceed to accurate power source voltage detection. This preliminary check prevents unreliable detection results caused by wiring abnormalities such as grounding or disconnection.
2Device complexity
If transmission line abnormalities are not detected, then device complexity remains low, but measurement precision of power source voltage deteriorates
Solution Approach 1:
The patent uses an intermediary approach by introducing a reference voltage and abnormality detection unit as mediators between the transmission line and the main voltage detection function. The reference voltage serves as a standard for comparison, and the abnormality detection unit acts as an intermediary checker that validates the transmission line status before allowing accurate measurement. This intermediary mechanism ensures measurement precision without significantly complicating the overall system.
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
Enables reliable detection of power source voltage and transmission line abnormalities by differentially amplifying the power source reference and standard voltages, improving the accuracy of power source voltage detection even in the presence of wiring issues.
Implementation Method 1
a differential amplifier which differentially amplifies the first power source voltage detection voltage and the second power source voltage detection voltage
Data Source
AI summary
A power source voltage detection apparatus is provided, including a reference voltage generator connected to a differential amplifier via a first transmission line and decreases a power source voltage of a direct current power source to output a power source reference voltage, the first transmission line transmitting the power source reference voltage as a first power source voltage detection voltage; a standard voltage generator connected to the differential amplifier via a second transmission line and outputs a predetermined standard voltage, the second transmission line transmitting the standard voltage as a second power source voltage detection voltage; the differential amplifier differentially amplifying the first and second power source voltage detection voltages; and an abnormality detector which, based on the first and second power source voltage detection voltages, detects the power source voltage and detects an abnormality of the first transmission line and/or the second transmission line.