Precise distance measurement using ultrasonic sensor (HC-SR04) and Arduino

  • Estado: Pending
  • Prêmio: $20
  • Inscrições Recebidas: 6

Síntese do concurso

The challenge:
Measure the distance using the ultrasonic distance sensor after a trigger signal. Send the result through the serial port (Baudrate: 115200, 8 databit, No parity, 1 stopbit) within 200[ms] (so the result must arrive within 200[ms] after the trigger), each result must arrive in a new line. The result must arrive as string rounded to 2 decimal places.
If the result do not arrive in 200[ms] after the trigger then a 0 will be recorded in its place. All the provided sensors can be used. The trigger signal is a high-low-high transition with 10[ms] low time.

How to participate:
Send the hex file of your code to us: ingaelearn (at) [login to view URL] or share your link in the description of your submission. You can send maximum 3 submissions per user (3 HEX files). You have to select your final submission.

Testing:
An object will be set to different distances from the distance sensor, the output of your code will be recorded. We will test each HEX once during the submission period and once after closing the submission period with a slightly different measurement setup.
The score will be calculated with the Mean Squared Error using the ground truth, the lower the better.

Winner:
The participant with the lowest Mean Squared Error result will be in the first place. In this case you have to share your source code with us to win the prize.

Prize:
$20

The hardware setup:
Name Type Pin configuration

Arduino Uno Rev. 3 SERIAL RX: PIN0
SERIAL TX: PIN1
TRIGGER: PIN4

Temp. & hum. sensor DHT11 SIGNAL: PIN2

Distance sensor HC-SR04 TRIG: PIN13
ECHO: PIN12

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  • patrickwagner068
    patrickwagner068
    • 1 mês atrás

    What do you mean by "high-low-high" transition ?
    Do you want the signal to be triggered on logic level or signal edge ?
    Should it trigger from high to low or low to high ?

    What do you mean by rounding to 2 decimal places? Which unit ?
    Should the String only contain the number or the unit and elapsed time as well ?

    How do you want exceptions to be handled ?
    The HC-SR04 operates between 2cm and 4m, what should happen, when a result is outside this range ?

    • 1 mês atrás
  • tonnyboy
    tonnyboy
    • 1 mês atrás

    I have a problem while submiting work please check the link https://www.youtube.com/watch?v=Zux5YFAge1E

    • 1 mês atrás
  • Abelk020
    Abelk020
    • 1 mês atrás

    Is the wiring connection flexible, i mean can the external trigger pin which gives high low high signal be connected to pin 3.

    • 1 mês atrás
  • Abelk020
    Abelk020
    • 1 mês atrás

    "If the result do not arrive in 200[ms] after the trigger then a 0 will be recorded in its place." Can you please elaborate.?

    • 1 mês atrás
  • i2eng
    i2eng
    • 1 mês atrás

    Hello! Do you need the code for the DHT11 too?

    • 1 mês atrás
    1. collaborart
      Proprietário do Concurso
      • 1 mês atrás

      The DHT11 is only for temperature calibration if you need.

      • 1 mês atrás
  • collaborart
    Proprietário do Concurso
    • 1 mês atrás

    If you have any questions feel free to ask!

    • 1 mês atrás

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