Installation structure of sensor and projector apparatus having the same
US8287134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2009 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An airflow rate sensor is provided with a through hole, and a detection unit is disposed inside the through hole. The airflow rate is calculated based on the output voltage resulting from the temperature difference and the like caused in the detection unit by the air flowing through the through hole. A duct is provided with a concave portion so as to protrude from outside the duct toward the inside thereof. The airflow rate sensor is disposed in the duct so as to cover the concave portion, in which the through hole is in communication with the space in the concave portion. The concave portion has a bottom provided with an opening. Accordingly, an installation structure of a sensor for reliably sensing a flow rate and a projector apparatus having the same are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.