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Thread: Custom USB Parking Sensor interface (formally PDC-USB)

  1. #341
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    Quote Originally Posted by Crihz View Post
    Hi everyone,

    Just found this thread and read about the plugins. I wonder if it would be a good idea to combine the image of the plugin with a reverse-cam. What do you think?

    I'm not sure how this would look but I can imagine seeing a full screen reverse-camera image and the plugin in one of the corners. Has anyone tried something like that? It would of course requier a screen capture device to combine the two images...and that might cause a delay in the image...or are there any better solutions you can think of?

    I know a camera plus sensors are overkill..but hey..it's 2010...and I like to do things like that just because it's possible. Sadfully I lack the skills to develop a plugin that can handle a camera and parking sensors.

    The RoadRunner/RideRunner plugin does just that.

    RRPDC - RoadRunner park distance control extension plugin


    So does the one for CF2

    http://forums.fluxmedia.net/plugin-d...ol-plugin.html

  2. #342
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    @Enforcer: Thank you so much!
    That is exactly what I'm looking for....would it be overkill to have a camera in front as well? You know, just because it's possible...ghehe.

  3. #343
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    Quote Originally Posted by Crihz View Post
    ...would it be overkill to have a camera in front as well? You know, just because it's possible...ghehe.
    Or you're really cr@p at parking.

  4. #344
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    hmm... as far i remember the plugin does only support one cam? please correct me if wrong
    Blessed are the "cracked" for it is they who let in the light.

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    Quote Originally Posted by boelle View Post
    hmm... as far i remember the plugin does only support one cam? please correct me if wrong
    You are right.

  6. #346
    xsi
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    Hi,

    Can someone point to a parking sensor on ebay that will work with this interface.

    I bought this one but after i opened the transmiter module it seems to me a little bit different from the pictures in this thread.

    Is this the right kit?


    Thank you all

  7. #347
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    Quote Originally Posted by xsi View Post
    Hi,

    Can someone point to a parking sensor on ebay that will work with this interface.

    I bought this one but after i opened the transmiter module it seems to me a little bit different from the pictures in this thread.

    Is this the right kit?


    Thank you all
    Hi,
    I think you have right kit. Boards work only with Cisbo SB323-4 kits.

  8. #348
    xsi
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    Quote Originally Posted by _Dejan_ View Post
    Hi,
    I think you have right kit. Boards work only with Cisbo SB323-4 kits.
    Hi Dejan,

    Thats's what is writen in the BOX (Model ID: SB-323-4 Wireless).

    However it seems that might have been a board revision, since the layout is diferent from the pictures in the first page.

    I hope it still works anyway.

  9. #349
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    Could someone please attach Parts list & PCB scaled 1:1 (PDF - Adobe Reader)

    Site is down

  10. #350
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    question

    Quote Originally Posted by Robby BMW View Post
    According to the requests of some users, I've developed this new interface that allows to connect an ultrasonic parking sensor to the PC through the USB port, like I've alredy done for the TPMS kit (Hoops! I did it again ).
    The whole project is based on a cheap parking sensor kit (see the picture below) which can be purchased from many online retailers as well as on eBay and a simple interface based on the PIC microcontroller 18F2550.

    Attachment 50457
    - the Prking Sensor kit used in the project -

    The Parking Sensor used is wireless, this means that it doesn't need a wired connection between the main unit and the LED display and that it uses a serial protocol for the communication, so, once identified the transmitter located inside the main unit, it has been relatively easy to analyze the data structure.

    Attachment 50459
    - the main unit opened with the transmiter highlighted -

    Basically the whole data packet is composed by 24 periods where the logical "0" has a time duration of about 600 ÁS and the logical "1" is about 1200 ÁS, so when the Parking Sensor is powered, typically through the reversing lights, it starts to transmit a series of 3 bytes (24 bits) many times per second.

    Attachment 51166
    - periods time duration -

    The 3 bytes sequence contains the address and the data (distance from the obstacle) detected from each ultrasonic sensor, so, since the ultrasonic sensors are 4, we will have 4 sequences of 3 bytes repeated over time, one for each ultrasonic sensor.

    Attachment 50458
    - the whole data packet -

    The first byte is composed by 2 nibble (4 bits), the first nibble identifies the ultrasonic sensor (0 = A, 1 = B, 2 = C and 3 = D) and the second nibble is complementary to the first, in order to verify the integrity of the data received.
    The second byte, as for the second nibble of the first byte, is complementary to the third byte.
    The third byte contains the distance detected expressed in centimeters.

    So, if the ultrasonic sensor B detects an obstacle at 83 cm, the sequence is: 30 - 172 - 83 (0001 1110 - 10101100 - 01010011).

    In order to allow the use of other types of Parking Sensors kits, I also looked into a second model produced by a different manufacturer (a special thanks to Enforcer who has provided both kits for the development of this project).
    This last is wireless like the first one, but it has an LCD screen instead of a LED display.

    Attachment 50469
    - the other Prking Sensor kit -

    The main unit of this Parking Sensor kit is different from the previous one, but the main difference is in the data sent to the display.

    Attachment 50487
    - the main unit opened with the transmiter highlighted -

    The whole data packet of this second kit is composed by 10 half periods where the logical "0" has a time duration of about 2 mS and the logical "1" is about 5 mS, so when it is powered, a series of 10 bits will be transmitted to the display many times per second.

    Attachment 50488
    - half periods time duration -

    The 10 bits sequence contains the data (distance from the obstacle) detected from all the ultrasonic sensors, this means that with this Parking Sensor kit each data sequence carries all the distances detected from the four ultrasonic sensors, contrary to the first kit, which sends a single data sequence for each ultrasonic sensor.

    Attachment 50489
    - some data packets -

    The first nibble (4 bits) contain the shortest distance detected by a group of two ultrasonic sensors (A and B or C and D) expressed in decimeters (10 cm).
    The second nibble contain the longest distance detected by the other group of ultrasonic sensors.
    The penultimate bit indicates if the shortest distance (first nibble) is related to the ultrasonic sensors A and B (left side) or C and D (right side).
    The last bit is always "1".

    Doing a quick comparison between the two systems (the one LED and LCD) we can see that:

    The resolution of the LED system is 8 bits, so the accuracy is 1 cm (0.39 inches), the LCD system has a resolution of 3 bits only, then an accuracy of 10 cm (3.93 inches).

    The LED system transmits the data of each ultrasonic sensor individually, so we can display 4 sliders on the PC (one for each sensor), the LCD system handles the ultrasonic sensors in pairs, then we can have only two sliders, one for the right side and one for the left.

    Also, the LCD system needs to be connected to the USB interface only trough a cable, instead the LED one can operate also trough a wireless connection (bat this will be better explained later).

    Attachment 50494
    - comparison between the two Parking Sensor kits -
    Hi I have a Serie 1 and it brings the sensor of parking could connect to the CarPC to use it in centrafuse?

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