Slapper Detonator Barrel Optical Waveguide Diagnostic

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Solution Overview

Problem

Existing slapper detonators lack a means to reliably determine degradation of the explosive material and flyer plate, which can lead to reduced output and inefficient initiation due to chemical changes over time.

Innovation Solution

Incorporating an optical diagnostic device within the barrel assembly of the slapper detonator using a waveguide substrate that allows for spectroscopic monitoring of the explosive material's degradation through evanescent waves, enabling the selection of suitable detonation voltages based on chemical changes detected in the infrared spectrum.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If slapper detonators are used without optical diagnostic monitoring, then the device structure remains simple, but the reliability of initiation decreases due to inability to detect explosive material degradation

Engineering Contradiction:
Improveinitiation reliabilityVSAvoiddevice structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The optical diagnostic device is integrated into the barrel assembly of the slapper detonator, merging the diagnostic function with the existing structural components. The waveguide is incorporated within the barrel assembly, allowing spectroscopic monitoring of explosive material degradation while maintaining a compact configuration and avoiding significant increases in overall device complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

A waveguide serves as an intermediary medium to transmit optical signals between the light source and the explosive material. The waveguide enables non-contact optical monitoring of the explosive material's chemical state through evanescent waves, providing degradation detection without requiring direct physical contact between the diagnostic device and the explosive, thus maintaining reliability while managing complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If optical diagnostic device is integrated into the barrel assembly, then explosive material degradation can be monitored, but the manufacturing complexity increases

Engineering Contradiction:
Improvedegradation monitoring precisionVSAvoidmanufacturing complexity
Core Design Contradiction:
Measurement precisionVSEase of manufacture

Solution Approach 1:

The barrel assembly serves multiple functions: it contains the explosive material, provides structural support for the slapper mechanism, and houses the optical diagnostic device. By making the barrel assembly multi-functional, the integration of the optical diagnostic device does not require separate structural components, thereby reducing the overall manufacturing complexity despite the added diagnostic capability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The optical diagnostic system replaces complex mechanical sensing mechanisms with optical spectroscopy. Instead of using mechanical sensors to detect explosive degradation, the system uses optical waves to probe the chemical state of the explosive material, simplifying the manufacturing process while achieving precise degradation monitoring through spectral analysis.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If spectroscopic monitoring is implemented, then initiation efficiency improves through voltage adjustment, but the device requires additional optical components

Engineering Contradiction:
Improveinitiation efficiencyVSAvoidoptical components
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The optical diagnostic device provides preliminary information about the explosive material's chemical state and degradation level before initiation occurs. This allows the system to pre-adjust the initiation voltage based on actual material conditions, ensuring optimal initiation efficiency. The spectroscopic monitoring is performed in advance, enabling voltage optimization before the detonation event.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system utilizes changes in optical parameters (absorption spectra) to detect explosive material degradation. By monitoring shifts in spectral features, the system determines the extent of chemical changes in the explosive and adjusts the initiation voltage accordingly. This parameter-based approach enables precise control of initiation efficiency while using relatively simple optical components.

Inventive Principle:
Principle #35Parameter changes

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 precise monitoring of explosive material degradation, ensuring reliable initiation by adjusting voltages according to the extent of degradation, thereby maintaining consistent and efficient detonation performance.

Implementation Method 1

using a waveguide substrate that allows for spectroscopic monitoring of the explosive material's degradation through evanescent waves

Methodology Applied
Scientific EffectEvanescent waves: Absorption (EM radiation)

Implementation Method 2

spectroscopic monitoring of the explosive material's degradation through evanescent waves, enabling the selection of suitable detonation voltages based on chemical changes detected in the infrared spectrum

Methodology Applied
Scientific EffectAbsorption Spectroscopy: Absorption Spectroscopy

Data Source

PatentUS7942097B1Modular initiator with integrated optical diagnostic
Publication Date: 2011.05.17 NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA LLC
  • US7942097B1 patent drawing
  • US7942097B1 patent drawing
  • US7942097B1 patent drawing

AI summary

A slapper detonator which integrally incorporates an optical wavequide structure for determining whether there has been degradation of the explosive in the explosive device that is to be initiated by the detonator. Embodiments of this invention take advantage of the barrel-like character of a typical slapper detonator design. The barrel assembly, being in direct contact with the energetic material, incorporates an optical diagnostic device into the barrel assembly whereby one can monitor the state of the explosive material. Such monitoring can be beneficial because the chemical degradation of the explosive plays an important in achieving proper functioning of a detonator/initiator device.