That is an astonishing statistic, Chuck. I had no idea it was that high. Makes you wonder how high the percentage is for texting and talking on cell phones. In some cases, cell phone records are used to see if the driver was on the phone when a fatal accident occurred:
As an engineer who designed a standards certified breathalyser 10 years ago, you are correct about the selectivity issues of semiconductor sensors. They also have issues around flow rates influencing readings.
We used an inhouse assembled platinum catalyst phosphoric acid micro cell with a solenoid driven silicone bellows to sample the airstream after 1.5 litres of air been expelled. The ethanol would be 'reacted' fuel cell like to produce a peak in around 5 seconds. Even then stated accuracy was +-10%.
This is the method most law enforcement units use. Evidential units will normally use infrared with pre and post sampling of a reference gas.
Perhaps attitudes are changing, but my nephew owns a company that installs car audio systems. For the past year the overwhelming bulk of his work has been installing breath interlock systems in the autos of people convicted of driving under the influence. Too many people are sure they are the only people on the road who can handle the amount of alcohol they have consumed.
I think your idea is genius!!! It sounds like a perfect way for parents to ensure their children's safety when they are away at college. Can you e-mail me at email@example.com, so that we can speak about your product? Thanks
In our third annual contest, Design News and Allied Electronics are going to crown a winner in early 2016 for the best reader gadget submission this year, and once again, you, the readers, are the judges!
The Attack Dyno brings car enthusiasts an attack timer and dynamometer in a small, portable package with the ability to output vehicle torque, speed, horsepower, 1/4 mile times, 0-60 mph acceleration times, ambient air temperature, and more.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.