Seating Sensor Switch Pairing to Reduce False Detection from Luggage
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Solution Overview
Problem
Existing seating sensors struggle to accurately detect seating patterns, such as normal and side sitting, while also preventing false detection due to luggage, as they often have inadequate switch configurations and are prone to false triggers from loads applied at both ends or in the center of the seat.
Innovation Solution
A seating sensor with a first pressure-sensitive switch group comprising six switches arranged along the seat's left-right direction, including three first and three second switches, with specific pairs positioned to detect seating in various patterns and suppress false detection by ensuring that switches are turned on only when an occupant is seated, and not when luggage is placed on the seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure-sensitive switches are arranged at intervals in the left-right direction of the seat, then seating detection capability is improved, but false detection due to luggage increases
Solution Approach 1:
The pressure-sensitive switch group is divided into multiple pairs (first pair, second pair, third pair) with specific spatial arrangements. Each pair consists of switches at different positions, and seating is detected when both switches in at least one pair are activated. This segmentation allows the system to distinguish between seating patterns (where weight is distributed across multiple points) and luggage (where weight may be concentrated or distributed differently), thereby reducing false detection while maintaining accurate seating detection.
2Adaptability or versatility
If two pressure-sensitive switches are located on each of the left and right sides, then side sitting detection is improved, but appropriate arrangement in all sitting patterns becomes impossible
Solution Approach 1:
Different pairs of pressure-sensitive switches are positioned to detect different sitting patterns. The first pair detects normal sitting, the second pair detects left side sitting, and the third pair detects right side sitting. By assigning specific detection functions to different local arrangements of switch pairs, the system achieves high adaptability across all sitting patterns while maintaining reliable detection through the specialized configuration of each pair.
3Measurement precision
If pressure-sensitive switches are arranged to detect seating, then seating detection is improved, but false detection due to luggage placed in central portion increases
Solution Approach 1:
The system pre-configures multiple pairs of pressure-sensitive switches at specific positions before operation. The requirement that both switches in a pair must be activated creates a preliminary condition that prevents false detection from centrally placed luggage, as such luggage would need to simultaneously activate both switches in a pair at specific spatial relationships, which is unlikely compared to actual seating patterns.
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 sensor effectively detects seating in all normal and side sitting patterns while minimizing false detection from luggage, ensuring accurate occupancy detection and reducing false alarms.
Implementation Method 1
a first pressure-sensitive switch group including at least six pressure-sensitive switches arranged along a left-right direction of a seat
Data Source
AI summary
A first pressure-sensitive switch group of a seating sensor includes first pressure-sensitive switches (SW11 to SW13) and second pressure-sensitive switches (SW21 to SW23) located on one side of a seat in a left-right direction from the first pressure-sensitive switches, and includes a first pressure-sensitive switch pair including the first pressure-sensitive switch (SW11) and the second pressure-sensitive switch (SW21), and the first pressure-sensitive switch (SW13) and the second pressure-sensitive switch (SW22) located between the first pressure-sensitive switch (SW11) and the second pressure-sensitive switch (SW21), a second pressure-sensitive switch pair including the first pressure-sensitive switch (SW12) and the second pressure-sensitive switch (SW22), and a third pressure-sensitive switch pair including the first pressure-sensitive switch (SW13) and the second pressure-sensitive switch (SW23), in which seating is detected when both the first pressure-sensitive switch and the second pressure-sensitive switch in at least one of the first to third pressure-sensitive switch pairs are turned on.