Self-Powered Current Sensor Linear Adjustment

Solution Overview

Problem

Current self-powered current sensors require manual calibration and testing, leading to extended downtime and increased costs due to non-linear adjustment responses, which can result in incorrect trip-point settings and potential equipment damage or inefficiencies.

Innovation Solution

A self-powered current sensor with linear adjustment capabilities allows users to set trip-point values and delay times using visual indicators, eliminating the need for recalibration and verification, thereby simplifying installation and configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual adjustment and testing is performed on present self-powered current sensors, then the trip-point value can be set, but the system experiences extended downtime and increased costs

Engineering Contradiction:

Improvetrip-point setting accuracyVSAvoidsystem downtime

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-calibrating the current sensor off-site before installation. The sensor is calibrated in a controlled environment using standardized procedures, and the calibration data is stored in memory. This eliminates the need for on-site manual adjustment and testing, thereby reducing system downtime while ensuring accurate trip-point settings.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements self-service through automatic self-diagnosis and self-calibration capabilities. The sensor includes microprocessor-controlled circuitry that automatically detects calibration requirements and performs self-adjustment based on stored reference data. This eliminates manual intervention entirely, reducing both downtime and labor costs while maintaining precision.

Inventive Principle:

Principle #25Self-service

2Measurement precision

If manual adjustment and verification testing is performed on present self-powered current sensors, then the trip-point value can be confirmed, but labor costs and installation complexity increase

Engineering Contradiction:

Improvetrip-point setting accuracyVSAvoidinstallation simplicity

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent implements self-service through automatic self-diagnosis and self-calibration capabilities. The sensor includes microprocessor-controlled circuitry that automatically detects calibration requirements and performs self-adjustment based on stored reference data. This eliminates manual intervention entirely, reducing both downtime and labor costs while maintaining precision.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical adjustment mechanisms with electronic self-calibration systems. Instead of physical potentiometers and manual testing procedures, the system uses microprocessor-controlled digital adjustment and automatic verification, significantly simplifying the installation process while maintaining or improving accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If incorrect trip-point values are set on self-powered current sensors, then equipment damage or process inefficiencies may occur, but the risk cannot be eliminated without extensive testing

Engineering Contradiction:

Improveequipment protection reliabilityVSAvoidconfiguration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements feedback through automatic self-diagnosis and verification systems. The sensor continuously monitors its own operation and compares measured values against calibrated reference data. If deviations are detected, the system automatically alerts operators and can perform self-correction, ensuring reliable equipment protection without requiring complex manual configuration procedures.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual mechanical adjustment mechanisms with electronic self-calibration systems. Instead of physical potentiometers and manual testing procedures, the system uses microprocessor-controlled digital adjustment and automatic verification, significantly simplifying the installation process while maintaining or improving accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP2888793B1Self-powered current sensor with a linear adjustment

Publication Date: 2022.05.25 NEILSEN-KULJIAN INC

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AI summary

A self-powered current sensor is described. The self-powered current sensor including an electrical signal input configured to receive a current signal. Further, the self-powered current sensor includes a power circuit configured to generate a power voltage from an electrical signal. The self-powered current sensor also includes a variable resistor configured to set a value corresponding to one or more indicators on the electrical sensor and an amplifier coupled with a variable resistor and a power circuit. And, the self-powered current sensor includes an alarm coupled with an amplifier, an alarm configured to activate based on a value set by said variable resistor.