Title - Sensors in a car bumper for parking


Example In one minute summary


Area of Impact


2.5 Home & Leisure Hardware, software and networks

The sensors and the monitor are the hardware components, then the software for them to communicate is needed as well, and therefore a network is constant between them.



One Minute Summary




Input – Ultrasonic sensor (radio waves) (It continuously monitors to the computer system it operates under to determine the distant between the rear and the objects behind it. The sensor detects only detects objects within it’s working frame restriction.)


Processing - The echo waves sent back to the sensors and the data is stored short-term in the monitor.In the monitor the processing of the data follows under this formula:

Screen Shot 2012-11-01 at 6.02.38 PM.png


Communication -This monitor communicates with the sensors through Bluetooth (short-term radio transmissions) are translated into the distance between the car and the object/s.

Output –Alarm (Audible) (When the sensor spots an object close to the rear, it informs the driver by producing a sound. Often a horning sound (beep).

Storage - It restores (RAM) every time the car drives in reverse. The storage is raw each time the sensors are activated.


Additional Information


Limitations:

  • The ultrasonic car bumper sensor is the cheapest type of sensor.
  • It can misread information when attempting to identify slopes /both upwards and downwards) as being obstacles. However this can be reduced by installing many sensors that are spread throughout the bumper’s length. This might lessen the looks of the car since the additional sensors are external.
  • Small objects that considered as obstacles to the car may not reflect sound back to the sensors and can therefore not be detected.

Benefits:

  • About 300 RMB.
  • Prevents injuries, increases safety.
  • Self-awareness for drivers.


Sources


http://www.which.co.uk/cars/choosing-a-car/car-features/parking-systems-explained/parking-sensors/

http://www.parkingsensors.co.uk/

http://www.ehow.com/info_7753319_automotive-parking-sensor-work.html

http://www.ehow.com/how-does_4564441_parking-sensors-work.html

http://www.ehow.com/how-does_5025990_ultrasonic-parking-sensors-work.html







Potential Issues


Reliability and Integrity 1.1
''Data may be unreliable if it has been entered incorrectly with the real world''. this relates to the car bumper sensors because some information might be translated incorrectly or lost during the input process, where obstacles can be misread as free space to drive through. Also, how does the sensor make sure that the detection of an ''obstacle'' actually is recognized as an obstacle for the driver/ and or in traffic? These question are raised with the bumper sensor car and can be viewed differently. Some argue that bumper sensors should include a camera to get the drivers view, so that the machine doesn't do all the work and determines the obstacle itself. Others argue that sensors are insufficient and the back mirror is a better choice of identifying obstacles in the reverse.

People and machines 1.11
- Who is better at making judgements, the people driving or the sensor (machine)? The more sensors that are used, the more accurate the recognition of obstacles are. However, the driver might not trust the sensors and look reverse to identify the obstacle him/herself. Therefore, the newer car sensors have an additional camera that projects the bumper's view for the driver. This solution is more secure for the driver and allows them to cooperate with each other effectively. On the contrary, This technology is fairly expensive and doesn't look very good unless it's an internal design, which only new cars would then have built in.

Digital Citizenship 1.12
- Should everyone own a bumper sensor to increase safety? This is an issue that arises from inventing the car sensor for rare bumpers. Many websites claim that the ultrasonic bumper sensor ''prevents injuries, increases safety'' (in Benefits section), which draws people attention to whether it should be compulsory or not. If the death rate in traffic could be decreased bu numbers due to a 300 RMB device, then should it be mandatory to have one activated in each car? To be ''appropriate behavior that represents the responsible ethical and legal approach that individuals take in any situation with respect to the use of IT'' is part of being a digital citizen.

Evaluation:
The ultrasonic bumper sensor is a great invention that increases safety, self-awareness for drivers in traffic and are cheap, as a result helps to prevent more injuries. The ultrasonic bumper sensor has some limitations of judging the obstacles and the information sent back to the monitor. However, the later technology have added cameras that are positioned in the rare bumper that documents and projects the view form the rare bumper to the driver on a small monitor. This monitor also projects where the sensors determine obstacles. The obstacles will be highlighted in strong red or yellow to draw attention to the driver. Since some people believe that the driver can make a better judgement than a robot can, the idea of the camera to go with it is a solution for those. If a car only has two bumper sensors, then the probability of accurate determination of obstacles is pretty low. This is caused by the loss of data (ultrasonic waves) that is meant to bounce back from an obstacle. The sensor might not see the cat or the tricycle behind the car. In addition, the ultrasonic sensors misreads slopes as obstacles and can therefore not reliable in all cases. The limitations are pretty weak since the camera that can be used with the sensors to get the drivers perceptive is doable. The cost of the camera is pretty high right for now, but new model cars have it. The benefits of the rare bumper sensors are stronger because the idea of a sensor is to increase the safety of a driver. Unfortunately, this opens new questions though, Can the driver who doesn't have the camera blame the sensor for misreading an obstacle as ''free to drive''?
In conclusion, the ultrasonic rare bumper is a valid choice. It should be compulsory and people should have cameras in the back to not fully trust the machine itself. Future developments will be made and the reliability of the ultrasonic rare bumper sensor will increase.