Safety Mat Structure for Heat-Resistant Intrusion Detection
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Solution Overview
Problem
Pressure-sensitive switch mats used to detect intrusions can be damaged by high-temperature substances adhering to their surface, particularly in environments like mold clamping devices where molten resin may fall.
Innovation Solution
A safety mat configuration that includes a pressure-sensitive switch mat with a flexible surface sheet, a step board, and load transferring members arranged between the switch mat and the step board, allowing the switch mat to detect loads without direct exposure to high-temperature substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure-sensitive switch mat uses a flexible surface sheet to detect loads, then the detection reliability is improved, but the surface sheet is vulnerable to damage from high-temperature substances
Solution Approach 1:
A heat-resistant plate is introduced as an intermediary component between the pressure-sensitive switch mat and the environment. The plate has a heat-resistant surface that contacts high-temperature substances, while its bottom surface transmits loads to the pressure-sensitive switch mat. This mediator protects the flexible surface sheet from direct exposure to heat while maintaining detection functionality.
Solution Approach 2:
The solution transitions from a single-layer flexible surface sheet to a multi-layer structure adding the heat-resistant plate dimension. The plate creates a new interface layer that separates the detection function from the heat exposure, allowing the flexible sheet to maintain its load-sensing properties without direct thermal contact.
2Object-affected harmful factors
If a heat-resistant plate is placed over the pressure-sensitive switch mat, then protection from high-temperature substances is improved, but the load detection capability may be compromised
Solution Approach 1:
The heat-resistant plate is designed with specific mechanical properties including flexibility and thinness. These characteristics allow the plate to transmit load forces effectively to the pressure-sensitive switch mat beneath it, ensuring that the addition of the protective layer does not significantly attenuate or distort the load signals being detected.
Solution Approach 2:
The plate's mechanical parameters (flexibility, thickness, material properties) are optimized to balance heat resistance with load transmission capability. By carefully selecting and adjusting these parameters, the design ensures that the plate provides thermal protection while maintaining sufficient mechanical coupling for accurate load detection.
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
The safety mat effectively prevents damage from high-temperature substances by protecting the pressure-sensitive switch mat with the step board, ensuring reliable intrusion detection without compromising the mat's integrity.
Implementation Method 1
When the pressure-sensitive conductive sheet is compressed, the conductive particles therein come into contact with each other at a compressed portion, thereby establishing electrical conductivity.
Implementation Method 2
The pressure-sensitive conductive sheet is made of a rubber material that is an insulator, and conductive particles mixed into the rubber material. When the pressure-sensitive conductive sheet is compressed, the conductive particles therein come into contact with each other at a compressed portion, thereby establishing electrical conductivity.
Implementation Method 3
a plurality of elastic support members provided on the bottom board, support the step board; and a load acting on the step board is detected by the pressure-sensitive switch mat via the plurality of load transferring members
Data Source
AI summary
A safety mat includes: a pressure-sensitive switch mat, a surface of which is made of a flexible sheet; a step board disposed on the pressure-sensitive switch mat; and a plurality of load transferring members arranged at intervals between the pressure-sensitive switch mat and the step board. A load acting on the step board is detected by the pressure-sensitive switch mat via the plurality of load transferring members.