Fingerprint Generator With Constant Force Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing techniques for developing latent fingerprints at crime scenes are inconsistent and unreliable due to uneven conditions when generating fingerprints for experimentation, affecting the reliability of fingerprint analysis.
Innovation Solution
A fingerprint generator capable of applying a constant force using a fingerprint molding body with a fingerprint shape on silicon or gelatin, which includes a base plate, a fingerprint mounting unit, a driving unit, and a force measuring unit to consistently generate fingerprints on a target surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fingerprint is generated by directly touching a human finger with a target surface, then the experiment can be conducted with simple equipment, but the conditions for generating fingerprints are uneven which impairs the reliability of the experiment
Solution Approach 1:
The patent uses a fingerprint molding body that replicates the fingerprint pattern onto a target surface. Instead of using a real human finger, a mold with the fingerprint pattern is pressed against the target surface to create a latent fingerprint. This copying approach ensures uniform pressure distribution and consistent fingerprint quality, resolving the contradiction between reliability and equipment complexity.
Solution Approach 2:
The patent introduces a fingerprint molding body as an intermediary between the pressure source and the target surface. This mediator ensures uniform force distribution across the fingerprint pattern, creating consistent latent fingerprints for reliable experimentation while maintaining relatively simple equipment setup.
2Manufacturing precision
If various levels of force are applied manually to generate fingerprints, then the device structure can be simple, but the conditions for generating fingerprints are uneven which affects experimental consistency
Solution Approach 1:
The patent incorporates a force measuring unit that provides feedback on the pressure applied during fingerprint generation. This feedback mechanism allows for precise control and adjustment of the force applied, ensuring consistent fingerprint quality across multiple experiments while maintaining a relatively simple device structure.
Solution Approach 2:
The patent replaces manual force application with a controlled mechanical pressing mechanism. The driving unit automatically applies uniform pressure through the fingerprint molding body, eliminating the variability inherent in manual pressing while keeping the overall device structure simple and manageable.
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 solution enhances the reliability of fingerprint analysis by ensuring consistent fingerprint generation, simplifying experimental procedures, and accelerating the development of techniques for developing latent fingerprints, thereby improving criminal case resolution.
Implementation Method 1
a force measuring unit configured to measure an impact force when the fingerprint mounting unit descends and contacts the fingerprint shape with the target surface to generate a fingerprint on the target surface
Data Source
AI summary
A fingerprint generator capable of applying a constant force includes: a base plate in which a target surface may be on an upper surface of the base plate; a fingerprint mounting unit that is apart from the upper surface of the base plate and capable of mounting a fingerprint molding body having a fingerprint shape thereon on a lower portion of the fingerprint mounting unit; a driving unit that is apart from the upper surface of the base plate and capable of moving the fingerprint mounting unit up and down; and a force measuring unit configured to measure an impact force when the fingerprint mounting unit descends and contacts the fingerprint shape with the target surface to generate a fingerprint on the target surface.