| 摘要 |
An alcohol sensing method (fig. 1) and device (fig. 3) is adapted to prevent the operation of equipment, such as an automobile by a user in an alcohol-impaired state. The alcohol content of an initial breath sample is compared to a reference value to determine whether the alcohol level is below the acceptable maximum (8). The breath sample is also compared to a reference value representing non-alcohol containing breath to insure that a true breath sample is being offered (22). If both tests are passed, the equipment is activated (24). After activation breaths are requested on a periodic basis to insure that the alcohol level remains at an acceptable level (26, 38, 42). An alarm (70) is activated if either an invalid or a sample having an excessive alcohol level is sensed (36). |
