Discharge Lamp Startup Voltage Monitoring for Fluorescence Detectors

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Solution Overview

Problem

Existing discharge lamps in fluorescence detectors lack accurate methods for determining when they need replacement, as human errors in recording usage time and count can lead to improper determination, and visual cues like brightness reduction or blinking are not reliable indicators.

Innovation Solution

A lamp lighting device with a lamp driver, voltage detector, and deterioration determiner that monitors lamp voltage during the transition to a stable arc discharge state, using predefined determination values to assess the lamp's condition based on lamp voltage patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If manual recording of lighting period and count is used, then device complexity is reduced, but measurement precision and reliability deteriorate due to human error

Engineering Contradiction:

Improvesystem complexityVSAvoidlighting usage measurement accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The discharge lamp system performs self-diagnosis by automatically monitoring its own lighting usage through integrated counters and timers that track lighting period and count without human intervention. The system self-records operational data and autonomously determines when replacement is needed based on predetermined warranty criteria.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors lighting usage parameters (period and count) and provides feedback to the control unit. When the monitored usage reaches predetermined warranty limits, the system automatically generates replacement notifications, creating a closed-loop feedback mechanism that ensures accurate tracking and timely maintenance.

Inventive Principle:

Principle #23Feedback

2Device complexity

If visual inspection of lit state is used, then device complexity is reduced, but measurement precision deteriorates because deterioration is not detectable until significant brightness reduction or blinking occurs

Engineering Contradiction:

Improvedetection system complexityVSAvoiddeterioration detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent replaces manual visual inspection with an automated electronic detection system. The control unit automatically monitors lighting usage parameters and compares them against predetermined warranty criteria, substituting human visual assessment with electronic measurement and automated decision-making.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system performs preliminary monitoring of lighting usage before significant deterioration occurs. By continuously tracking lighting period and count from the moment of installation, the system identifies when warranty limits are approaching, enabling proactive replacement scheduling before brightness reduction or blinking symptoms manifest.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If automated monitoring system is implemented, then measurement precision and reliability improve, but device complexity increases

Engineering Contradiction:

Improvedeterioration determination accuracyVSAvoidmonitoring system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control unit serves multiple functions: it controls the discharge lamp operation, monitors lighting usage parameters, stores installation and replacement dates, compares usage against warranty criteria, and generates replacement notifications. This multi-functionality reduces the need for separate dedicated components for each task.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 accurate determination of when a discharge lamp needs replacement, preventing continued use of deteriorated lamps and maintaining detection accuracy in fluorescence detectors.

Implementation Method 1

the discharge lamp in an unlit state due to driving of the lamp driver is lit by electrical breakdown between the anode and cathode

Methodology Applied

Scientific EffectElectrical breakdown: Avalanche Breakdown

Implementation Method 2

a discharge state between the anode and the cathode reaches a predetermined stable state after the discharge lamp in an unlit state due to driving of the lamp driver is lit by electrical breakdown between the anode and cathode

Methodology Applied

Scientific EffectArc discharge: Electric Arc

Data Source

PatentUS20250334520A1Lamp lighting device, fluorescence detector and chromatograph

Publication Date: 2025.10.30 SHIMADZU CORP

AI summary

A lamp lighting device is used to light a discharge lamp provided as a light source in a fluorescence detector. The discharge lamp has a configuration in which an anode and a cathode are arranged to be opposite to each other in a discharge container. The lamp lighting device includes a lamp driver, a lamp-voltage detector and a deterioration determiner. The lamp driver drives the discharge lamp. The lamp-voltage detector detects a lamp voltage in a monitoring period until a discharge state reaches a predetermined stable state after a discharge lamp in an unlit state is lit due to electrical breakdown. The deterioration determiner determines a deterioration state of the discharge lamp based on a detected lamp voltage.