Method for manufacturing a humidity alarm device based on laser-induced graphene
US12286354B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2024 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Dec 16, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/121
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for manufacturing a humidity alarm device based on laser-induced graphene is performed as follows. Carbon-based films are coated with a hydroxide ion-containing solution and processed by a laser device to generate hydrophilic graphene layers. The hydrophilic graphene layers are peeled off from the carbon-based films, wetted, and respectively wrapped around shaping rods varying in diameter. The wrapped rods are heated and shaped by a drying oven to obtain curled graphene switches. Each curled graphene switch is connected in series with an alarm lamp to form an alarm component. The alarm components are connected in parallel, and then connected to a positive terminal and a negative terminal of a power supply to form the humidity alarm device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.