Printing devices and liquid level depth detection method
US11660874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2021 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Jan 8, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/17579
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A printing device includes a main control board, a resin vat, a vibration generating assembly, a detection assembly and a support plate. The vibration generating assembly includes a drive component and a paddle. A drive end of the drive component is connected to the paddle, and the drive end is configured to drive the paddle to vibrate. The detection assembly includes an elastic sheet, a resistance strain gage and a detection circuit. The resistance strain gage is attached to the elastic sheet, a first end of the elastic sheet is arranged on the first face of the support plate, and a second end of the elastic sheet extends into the liquid to be detected. The detection circuit is configured to determine an output voltage according to a resistance value of the resistance strain gage. Automatic detection of the liquid level depth of the liquid to be detected is achieving.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.