Conductive Detection Fabric for Locating Multiple Bullet or Knife Strikes
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Solution Overview
Problem
Existing personal protection devices fail to detect multiple consecutive strikes and accurately locate them in different zones, becoming inoperative after a single strike.
Innovation Solution
A fabric-based device with two overlaid layers of conductive wires forming orthogonal detection strips, each with a maze-shaped weave, connected to a control unit that detects and locates tears caused by bullet or knife strikes by identifying the intersection of broken wires in both layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single layer of conductive wires is used for detection, then the device structure is simple, but it cannot accurately locate strikes in different zones and becomes inoperative after one strike
Solution Approach 1:
The patent transitions from a single-layer detection system to a two-layer system with orthogonal wire arrays. The first layer has wires oriented in a first direction, while the second layer has wires oriented in a second direction perpendicular to the first. This dimensional transformation enables the system to detect and locate multiple strikes in different zones by identifying which specific wires in each layer are broken, providing both X and Y coordinate information for strike localization.
Solution Approach 2:
The detection fabric is segmented into two separate layers, each with its own array of conductive wires oriented in different directions. This segmentation allows each layer to independently detect strikes along its wire orientation, and the control unit can process breakage patterns from both layers to precisely locate multiple strikes without the layers interfering with each other's functionality.
2Productivity
If conventional detection methods are used, then the device can detect a strike, but it becomes inoperative after the first strike and cannot detect multiple consecutive strikes
Solution Approach 1:
The patent changes the detection parameter from monitoring a single continuous conductive path to monitoring multiple independent wire breakage events across two layers. By using orthogonal wire arrays, the system can distinguish between different strike locations based on which specific wires are broken in each layer, enabling continuous operation and detection of multiple consecutive strikes at different zones.
Solution Approach 2:
The control unit receives feedback from both wire arrays about which specific wires are broken, processes this information to locate strike zones, and can continue monitoring for additional strikes. The system uses the breakage pattern feedback to identify location and maintain operational capability for detecting subsequent strikes.
3Measurement precision
If multiple wires are broken by a single strike, then detection sensitivity increases, but locating accuracy decreases due to inability to pinpoint the exact intersection zone
Solution Approach 1:
By introducing a second layer of wires oriented perpendicular to the first layer, the system creates an orthogonal coordinate system. When wires break, the control unit can identify the specific intersection zone by determining which wire from the first layer and which wire from the second layer are broken, providing precise two-dimensional location information despite multiple wires being affected by a single strike.
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 detection and accurate localization of multiple strikes, allowing continued functionality after one strike, with real-time transmission of strike locations to a remote apparatus, and facilitates easy replacement of damaged fabric without replacing the control unit.
Implementation Method 1
US20170307336 discloses a technique for measuring changes in electrical resistance
Implementation Method 2
US2017261386A1 discloses a technique for measuring pressure
Data Source
AI summary
The invention relates to a device (1) for detecting or locating one or more tears, in particular caused by bullet or knife strikes, the device (1) comprising: a first layer (10) of fabric (2) having a first array of conductive wires defining detection strips (B1n) elongated in a first direction; a second layer (20) of fabric (2) having a second array of conductive wires that define detection strips (B2n) elongated in a second direction and forming an angle with the first direction; a control unit (3) connected to the arrays of conductive wires and configured to locate a zone (Zn) in which a tear in the fabric (2) causes the breakage of a conductive wire of the first layer (10) and a conductive wire of the second layer (20) at the intersection of two detection strips (B1n; B2n) of the two layers (10; 20); characterized in that, on each detection strip (B1n; B2n), the array has an insulated conductive wire forming a weave that is arranged across the width and along the length of the strip (B1n; B2n). The invention relates to a garment incorporating one or more devices. The invention relates to a protection system.