How Anti-sleep Alarms Work

Let’s start with the simplest anti-sleep alarm system, the over-the-ear gadget. This lightweight plastic device has an arm that slips over one ear, like some telephone earpieces or portable headphones do. Once it’s on, a sensor inside the case measures the angle from a perpendicular perspective. If the driver is looking straight ahead — as he or she should — the alarm measures the angle at zero degrees. If you’ve ever fallen asleep on a subway train or in your high school algebra class, you know that your head tends to fall forward as you doze off. You also know that you may stay asleep for a few seconds or a couple of minutes before your head jerks upright and you’re awake again. It’s annoying on the bus commute home; it’s downright dangerous when driving a car. The anti-sleep alarm looks for any indication that the driver’s head is tipping forward: When the earpiece senses that the angle has increased from zero to, say, 15 or 30 degrees, it sounds an alarm. Most manufacturers stress that the sound is loud and irritating enough to wake the driver, but not so loud or sudden that he wakes up with a start and yanks on the wheel or steps harder on the gas. You can easily adjust the angle that triggers the alarm. If you know you can sleep with your head almost upright, you can set your earpiece to a smaller angle. If the alarm goes off every time you bop your head along with the tunes on your radio, then you should set your triggering angle to 30 degrees or more. While these alarms work to help keep drivers awake, some high-end manufacturers are adding sleep sensors to their cars right at the factory. A few notable systems: Mercedes-Benz Attention Assist uses the car’s engine control unit to monitor changes in steering and other driving habits and alerts the driver accordingly. Lexus placed a camera in the dashboard that tracks the driver’s face, rather than the vehicle’s behavior, and alerts the driver if his or her movements seem to indicate sleep. Volvo’s Driver Alert Control is a lane-departure system that monitors and corrects the vehicle’s position on the road, then alerts the driver if it detects any drifting between lanes. Saab uses two cameras in the cockpit to monitor the driver’s eye movement and alerts the driver with a text message in the dash, followed by a stern audio message if he or she still seems sleepy. In-car systems can be expensive, especially those that involve in-dash cameras to monitor drivers instead of sensors that are already in place. Read on to find out who can benefit from an anti-sleep alarm, no matter what the cost. Security Alarm security alarm system china alarm security system security alarm systems wireless security alarm system security alarm systems for homes home alarm security systems wireless security alarm systems home alarm security system security alarm systems for home security home alarm systems alarm system for home security security alarms systems for homes home security alarms systems alarm system home security alarms security systems security and alarm systems security alarm systems wireless wireless alarm security system home security store alarm systems alarms and security systemsm security and fire alarm systems alarms and security systems security and fire alarm systems dreambox dm7080 dreambox dm7080 dreambox dm820 dreambox dm7020 hd v2 cheap wholesale dreambox dm800 hd v2 GigaBlue HD Quad Plus Sunray SR4 V2 Sunray SR4 800 se

Related Articles - How, Anti-sleep, Alarms, Work,

Email this Article to a Friend! Receive Articles like this one direct to your email box! Subscribe for free today!