A blind spot in a vehicle is an area around a vehicle that the driver can not directly observe while in control, under existing circumstances. Blind spots exist in various vehicles: airplanes, cars, motorboats, sailboats, and trucks. Other types of transportation have no blind spots at all, such as bicycles, horses, and motorcycles. Appropriate mirror adjustment and the use of other technical solutions can eliminate or reduce the blind point of the vehicle.
A no zone is one of several areas around a large truck, where truckers can not see. Collisions often occur in zones.
In transport, driver visibility is the maximum distance at which the driver of the vehicle can see and identify the protruding objects around the vehicle. Visibility is mainly determined by weather conditions (see visibility) and by vehicle design. The parts of the vehicle that affect visibility include windshields, dashboards and pillars. Good driver visibility is essential for safe road traffic.
Blind spots can occur on the front of the driver when the A pillar (also called a windshield pillar), side rearview mirror, or rear-view mirror is blocking the driver's view of the road. Behind the driver, cargo, headrests, and extra pillars can reduce visibility.
Video Vehicle blind spot
Menyesuaikan mirror untuk mengakhiri blind spot sisi
If the side mirror of the car is adjusted in a certain way, there is no blind spot on its sides. Such arrangements can greatly reduce the likelihood of side friction and other accidents, especially during lane changes. This method was first expressed by George Platzer in a 1995 paper presented to the Society of Automotive Engineers. This method is often overlooked in the driver's education class and takes time to get used to it. The removal of blind spot removal by well-trained drivers is cheap and eliminates the need for expensive technological solutions to the problem, provided drivers take the time to organize and use their mirrors effectively. The arrangement - pointing out the sides of the mirror substantially pasted in a fixed mechanical formula - is relatively easy to achieve, but it takes some knowledgeable and accustomed effort. It is considered a savior.
However, one source considers the method as a driving error and claims that it is even more dangerous than not using it, as it creates other blind spots just behind the vehicle - it lists nine reasons, for example , when support up - which is impossible to eliminate by "shoulder examination".
Backward invisibility is a completely different matter. The area behind the vehicle is the source of back-up collisions, especially those involving pedestrians, children, and objects directly from a vehicle. The area is called a "homicide zone". These problems are the object of a number of technological solutions, including (in the roughest sequence of technological complexity, the simplest first): rearview mirror, side mirror. fresnel lenses, sonar, parking sensors, and backup cameras. Similar problems stick to the left and right position of the rear bumper of the vehicle as the driver tries to retreat from the parking lot. Specially designed cross-border traffic warning systems have been developed to address this.
Maps Vehicle blind spot
Motor vehicles
When a person drives a car, blind spots are areas of the road that can not be seen when looking ahead or through side or rearview mirrors (hoping that the rearview mirror is properly adjusted on passenger cars - see above). The most common ones are the blind dots on the back, on the back of the vehicle on both sides. Vehicles on adjacent lanes of roads that fall into these blind spots may not be visible using only car mirrors. A quarter of the rear blind spots can:
- checked by turning a person's head briefly (risking a back collision),
- reduced by installing a mirror with a larger viewing area, or
- is eliminated by reducing the overlap between the side and rearview mirrors by adjusting the side mirrors so that the side of the car is barely visible when your head is between the front seat (for the right side mirror) and almost touching the driver window (for the left side mirror) then check to make sure you can see the car approaching from behind on both sides when on the highway.
Other areas sometimes called blind spots are too low to be seen in the back, in front, or on the side of the vehicle, especially those with high seating points.
Visibility forward
This diagram shows a blocked view in a horizontal plane in front of the driver. These front-end blind spots caused by this can create problems in traffic situations, such as at roundabouts, intersections, and road crosswalks. The front-end blind spots are influenced by the following design criteria:
- The distance between the driver and the pillar
- Pillar thickness
- Corner angle in vertical side-side view
- Corner angle in front of vertical plane
- the shape of a straight pillar or an arc shape
- The windshield corner
- Driver height with respect to dashboard
- Car speed opposite
A-pillar angle effect on visibility
Most passenger cars have diagonal pillars as shown on this side view. The angle between the horizon and the A-pillar is approximately 40 degrees with a straight pillar that is not too thick. It provides a powerful, aerodynamic car with a sized front door.
Panoramic front pane
The side of the curved panoramic windshield, which allows for the design of a vertical A-pillar that gives maximum visibility to the driver's front. However, it is impossible to design a small aerodynamic car with a vertical A-pillar because the more vertical A-pillar, the less space opens the door, and the larger frontal area and the drag coefficient the vehicle will have.
Examples of cars with almost vertical A pillars:
- Honda Step Bus Concept
- Saab 900
- School bus
- Almost all Cadillac from 1954-1959
Flatbed flat
Some modern car designs have a very flat A-frame angle with the horizon. For example, Pontiac Firebird and Chevrolet Camaro from 1993-2002 have a windshield angle of 68 Â ° with vertical, which equals 22 Â ° with horizon.
The advantages of A-pillar include reducing the overall drag coefficient and making the car body stronger in frontal collisions, at the expense of reducing the driver's visibility in the 180 ° field of view from left to right. A flatter pillar (and therefore a windshield) is also a factor when calculating the effects of a collision with a pedestrian. In general flat corners will produce a softer impact, driving the pedestrian "up and up" rather than directly to the windshield. This is especially true for cars like the Mercedes-Benz A-Class which also has a low sloping engine cover.
Another disadvantage of a flat windshield angle
- Other traffic can not see the driver through a bounce if the driver can see it.
- The heater takes more time to heat the surface of the larger window.
- A flat windshield angle makes snow unfastenable.
- The driver can not reach all the flat windows to clean it easily. â € <â € <
Drive height
The driver's height may also affect visibility.
A split A pillar and having a small triangular window (Front Quarter glass) can provide a short driver's visibility problem. Some of the windshield cars are fillets with roof lines with large radius. An A-pillar round fillet can provide a high driver visibility problem. Sometimes A pillar can prevent drivers from seeing motorcyclists.
Pillar B can also block the vision of a high driver in a small 4-door car.
A driver can reduce the size of the blind spot or eliminate it completely by turning their head toward obstruction. This allows the driver to see better around the obstruction and allows better perception of the driver's depth.
Visibility in conversions
Since there is no roof connection between A and B pillars, the A pillar of the convertible car must be stronger and even thicker.
However, with top down there is no B or C pillar, increasing the visibility behind the driver.
Window reflection
Dashboard Reflection
It would be better if the dashboard has a dark surface that does not reflect.
The small dashboard gives some reflections on the bottom of the windshield.
Large dashboards can provide reflections at eye level.
A-pillar Reflection
The best thing is if the inside of A pillar has a dark surface that does not reflect.
If the curved side of the window there is less A-pillar reflection.
Light through the reflection of the roof
Some new model cars have a very large sunroof. Sometimes sunlight penetrating the roof illuminates the dashboard and gives a reflection on the windscreen.
Other car design factors
Other design factors can prevent manufacturers from maximizing visibility. This includes security, since narrower columns can not be made as strong as thicker pillars, and aerodynamic-related size restrictions, because higher and more vertical windshields create additional obstacles and reduce fuel efficiency. They also include fashion and cost, where design and appearance considerations can be considered superior.
Blind Spot Information System
BLIS is a S S developed by Volvo. The previous company of Ford Motor Company from Volvo has adjusted this system with the brand of Ford, Lincoln, and Mercury.
The system was first introduced in the Volvo S80 sedan and generates a noticeable warning when a car enters the blind spot while the driver is on the track, using two lenses mounted on the door to check the blind spot for future collisions.
In Ford products, the system was first introduced in the spring of 2009 at the 2010 Ford Fusion and Fusion Hybrid, 2010 Mercury Milan and Milan Hybrid and the 2010 Lincoln MKZ and Mazda 6. The technology was also introduced on the Mazda CX-9 Grand 2010 Tour model.
Some newer and more expensive systems use side radar that offers better performance and also warns of vehicles approaching quickly entering the blind spot.
Ship
Blind spots are also in front of the boat. When the ship is accelerated, the bow rises, increasing the size of the blind point. Large ships can have up to several hundred meters of blind places. This is commonly known as the dead visual range of a ship. To overcome this, sometimes the camera is placed in front of the ship to cover the lost field of view.
Blind spots are where the behind-the-scenes area is obscured from the view of a helmsman on a sailboat or windsurfing. This is especially true when they are conquered; consequently, transparent windows are sometimes stitched onto the screen.
See also
References
External links
- "How to Get Rid of The Dreaded Blind Spot" "" . Retrieved August 9, 2013 .
- Recognize NIOSH Blind Spots Poster
- Magliozzi, Tom; Magliozzi, Ray. "An Extraordinary New Way to Organize Your Side View Mirror" (PDF) . Car Discussion . Retrieved August 9, 2013 .
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Car and Driver . Retrieved August 9, 2013 . - "Construction of Blind Area Equipment". Highway Workplace Safety Zone . National Institute for Occupational Safety and Health . Retrieved August 9, 2013 .
Source of the article : Wikipedia
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