Apparatus for remote analysis of vehicle emissions
US5210702A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1990 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Dec 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1793
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas analysis device for the remote detecting, measuring and recording of NO.sub.x, CO, CO.sub.2, HC and H.sub.2 O levels from the exhaust of moving motor vehicles. It utilizes a source of collimated infrared and ultraviolet radiation and includes a mechanism for receiving and measuring the infrared and ultraviolet radiation from its source, and another mechanism for measuring background infrared and ultraviolet radiation levels in the ambient atmosphere. The receiving mechanism splits the combined infrared and ultraviolet radiation into separate infrared and ultraviolet beams. A mechanism receives the separate ultraviolet beam and generates a signal indicative of NO.sub.x. Another mechanism splits the infrared beam into two to four components, and devices are positioned for receiving each of the infrared components and generating two to four signals indicative of, for example, CO, CO.sub.2, HC and H.sub.2 O. Another associated mechanism then computes and produces signals indicative of the amount of CO, CO.sub.2, HC, NO.sub.x and H.sub.2 O in the path of the infrared and ultraviolet radiation from the source, thereby making it capable of measuring emissions of vehicles. The source…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.