Automobile Mechanical and Electrical Systems

July 30, 2017 by  
Filed under How To Fix Your Car


Automobile Mechanical and Electrical Systems

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Self Driving Car How It Works Tech 10 Systems Autonomous Cars Need Commercial HD CARJAM TV 2016

July 16, 2017 by  
Filed under How To Fix Your Car

A Self Driving Car needs 10 Technologies to work: Combined radar and camera; Surround radars; 360° surround vision; Multiple beam laser scanner; Trifocal camera; Long-range radars; Ultrasonic sensors; High definition 3D digital map; High performance positioning and Cloud services. Watch in UltraHD + SUBSCRIBE #CARJAMTV

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Sensor technologies
Volvo Cars is developing a holistic solution that generates exact positioning and a complete 360° view of the car’s surroundings. This is achieved by a combination of multiple radars, cameras and laser sensors. A redundant network of computers processes the information, generating a real-time map of moving and stationary objects in the environment.
Combined radar and camera
The combined 76 GHz frequency-modulated continuous wave radar and camera placed in the windscreen is the same as that in the all-new XC90. This system reads traffic signs and the road’s curvature and can detect objects on the road such as other road users.

Surround radars
Four radars behind the front and rear bumpers (one on each corner of the car) are able to locate objects in all directions. By sweeping both left and right, transmitting waves that bounce off signs, poles, and tunnels, they monitor a full 360° around the car.

360° surround vision
Four cameras monitor objects in close proximity to the vehicle. Two are under the outer rear-view mirrors, one is in the rear bumper and one is in the grille. Besides detecting objects at close range, these cameras monitor lane markings.

The cameras have a high dynamic range and can handle very quick changes in lightning conditions, e.g. when entering a tunnel.

Multiple beam laser scanner
This sensor system is placed in the front of the vehicle, below the air intake. The scanner can identify objects in front of the car and ensures very high angle resolution. It can also distinguish between objects. The unique laser sensor has a range of 150 metres for vehicles and covers a 140° field of view.

Trifocal camera
In addition, a trifocal camera placed behind the upper part of the windscreen is three cameras in one, providing a broad 140° view, a 45° view and a long-range, yet narrow, 34° view for improved depth perception and distant-object detection. The camera can spot suddenly appearing pedestrians and other unexpected road hazards.

Long-range radars
Two long-range radars placed in the rear bumper of the car ensure a good rearward field of view. This technology is particularly useful when changing lanes because it can detect fast-moving vehicles approaching from far behind.

Ultrasonic sensors
Twelve ultrasonic sensors around the car are used to identify objects close to the vehicle and support autonomous drive at low speeds.

The sensors are based on the technology used for current park assist functions enhanced with advanced signal processing.
A typical example of when this technology is useful is for detecting unexpected situations, such as pedestrians or hazards on the road close to the car.

High definition 3D digital map
A high definition 3D digital map is the tool used to provide the vehicle with information about the surroundings, e.g. altitude, road curvature, number of lanes, geometry of tunnels, guard rails, signs, exits, etc. The position geometry is in many cases at centimetre level.

High performance positioning
The high performance GPS is one part of the positioning control that is enhanced by a combination of an advanced GPS, a 3-degrees of freedom accelerometer and a 3-degrees of freedom gyro. By matching the 360 image created by the multitude of sensors with the map image, the car will get the information about its position in relation to the surroundings.

By combining the information from the sensors and the map, the Drive Me car is able to choose the best course in real time, factoring in variables such as the curvature of the road, speed limit, temporary signs and other traffic.

Cloud services
The cloud service is connected to the traffic authorities’ control centre. This ensures that the most up-to-date traffic information is always available. The control centre operators also have the ability to tell the drivers to turn off the autonomous drive mode if necessary.
Autonomous vehicles sense their surroundings with such techniques as radar, lidar, GPS, and computer vision. Advanced control systems interpret sensory information to identify appropriate navigation paths, as well as obstacles and relevant signage.For example, the probability of a brake system failure is very small, but a self-driving vehicle needs a second independent system to brake the vehicle to a stop, as it is unlikely that the driver will be prepared to press the brake pedal.

Automobile Mechanical and Electrical Systems

May 12, 2017 by  
Filed under How To Fix Your Car


Automobile Mechanical and Electrical Systems


Automotive Electrical System Basics – EricTheCarGuy

This one covers the basic components of the electrical system and gives a general overview of their function. We have to start somewhere so we’ll start here.

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inside it!: Car Navigation Systems in Comparison | Drive it

January 9, 2017 by  
Filed under How To Fix Your Car

Anyone interested in a mobile navigation system is faced with a seemingly endless variety of possible devices from different manufacturers. And each manufacturer also offers a wide variety of systems within its own line.That prompted Drive it! to test the full range of devices offered by 8 producers, from cheap, entry level models, to the top of the line. We tested them using several criteria from speed of route calculation to ease of installation to find out whether cost really is an indication of performance.
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Automobile Mechanical and Electrical Systems

December 20, 2016 by  
Filed under How To Fix Your Car

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