Piezoelectric Rod Closure Detector for Sliding Windows
Solution Overview
Problem
Existing devices for detecting the state of sliding window closing systems are not suitable for sliding windows and face challenges with energy autonomy, requiring battery changes or recharging, which is inconvenient for users.
Innovation Solution
A device with an electronic circuit and piezoelectric generator that uses the movement of the rod to produce electric current, eliminating the need for batteries by harnessing the rod's translation to generate power and transmit position information wirelessly, featuring a mechanical transmission system and anti-false operation mechanism to ensure accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a battery or electric accumulator battery is used to power the detection device, then the device can operate and transmit signals, but the device requires periodic battery changes or recharging which is inconvenient for users
Solution Approach 1:
The detection device generates its own electrical energy through the piezoelectric generator by utilizing the mechanical movement of the rod during window opening/closing operations. This self-powered mechanism eliminates the need for external battery replacement or recharging, making the device maintenance-free and fully autonomous.
2Use of energy by moving object
If a piezoelectric generator is used to generate electrical current from rod movement, then the device achieves energy autonomy without batteries, but the device requires precise mechanical coupling between the rod and generator
Solution Approach 1:
A mechanical transmission member with a cylindrical body and inclined surface acts as an intermediary between the rod and the piezoelectric generator. This transmission member converts the linear movement of the rod into rotational movement of the cylindrical body, which then drives the piezoelectric generator. The inclined surface design ensures efficient energy transfer while accommodating minor mechanical play, reducing the precision requirements for mechanical coupling.
3Device complexity
If the rod translation is directly coupled with the piezoelectric generator, then the device simplifies the mechanical structure, but the device may be sensitive to mechanical play affecting detection accuracy
Solution Approach 1:
The mechanical transmission member with the inclined surface serves as an intermediary that amplifies the rod's movement while maintaining a simple overall structure. The inclined surface converts small linear displacements into larger rotational movements, ensuring that even minor rod movements are effectively transmitted to the piezoelectric generator, thereby maintaining detection accuracy without complex mechanical linkages.
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 reliable detection of the sliding window's position without electrical power, reducing energy consumption and preventing false readings, thus improving home automation and security by simplifying the detection process.
Implementation Method 1
Said electric generator comprises a piezoelectric generator
Implementation Method 2
said plate being shaped to undergo reversible buckling deformation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Device (1) for detecting the locking or unlocking of a rod closure system for a sliding bay, comprising an electronic circuit (42) including wireless communication means for a signal detecting a change in position of said rod, in which said detection device includes an electrical generator capable of producing an electric current supplying said electronic circuit (42) under the effect of the translation of said rod, said wireless communication means emitting a signal indicating the new position of said rod.