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Embedded Systems Parking Sensor and Occupancy Detection Monitor

Embedded motion sensor that uses an MSB430 Texas Instruments microcontroller to transmit parking space occupancy information.

Parkshark's Team Members:

assembled_board

  • Object Detection with Ultrasound Sensor:
    • The ultrasound sensor detects an object within half of a pre-set 'parking spot' distance.
    • Once the object has been detected for a given number of cycles, it is considered parked.
  • LED Status Indication:
    • The LEDs toggle from blue (unoccupied) to red (occupied) to indicate the parking spot status.
  • Microphone Polling for Object Departure Detection:
    • After an object is parked, microphone polling is turned on to detect low-frequency noises that suggest the object may be leaving the spot (e.g., engine rumble or footsteps).
  • Polling Rate Adjustment with Yellow LED:
    • The ultrasound sensor's polling rate is increased when the yellow LED indicates noise above the set threshold.
  • Reverting to Original Polling Rate:
    • When the ultrasound no longer detects an object, microphone polling is turned off, and the ultrasound polling rate is decreased back to the original slow cycle.
  • System Controls:
    • There is a button to turn the system on/off.
    • Another button is used to turn debug mode on/off, indicated by LED indicators.
  • Potentiometer Path Selection for Filtering:
    • A switch is used to select the potentiometer path when correcting envelope distortions in the microphone filtering.
  • Radio Communication for Data Transmission:
    • Radio communication is utilized to transmit information about the status of a parking spot (empty or occupied) and the duration for which an object has been parked.

UNIT TESTING:

Ultrasound Sensor Testing:

  1. Navigate to ultrasound_testing --> ultrasound_unit_testing and open the module in Energia (ultrasound_unit_testing.ino).
  2. Set up a Launchpad with an ultrasound monitor (e.g., a breadboard).
  3. Change the DEBUG_MODE macro at the top to true.
  4. Upload the code to your Launchpad.
  5. Open the serial monitor to view how many of the tests have passed. These tests validate a valid distance measured, valid measurement based on parking spot size, occupation status, and parking status.

Radio Testing:

  1. For a non-modular version, use the TX/RX examples in the Buffet repository.
  2. For a modular design, navigate to radio_testing --> radio_unit_testing and open the module in Energia (radio_unit_testing.ino).
  3. Set up two Launchpads with a CC1101 radio.
  4. Set up a TX Launchpad and upload the code with RECEIVING and DEBUG_MODE set to false.
  5. Set up a RX Launchpad and upload the code with RECEIVING and DEBUG_MODE set to true.
  6. Plug in the transmitting Launchpad after the code starts running on the receiving Launchpad. Verify that the correct number of packets were received, and that the value of the last packet received and the sum of all packets received are accurate.

Microphone Testing:

  1. Navigate to microphone_unit_testing and open the module in Energia (microphone_unit_testing.ino).
  2. Set up a Launchpad with a microphone and upload the code.
  3. Set DEBUG_MODE to true and run the code. The serial monitor will print which tests have passed.
  4. For the tests verifying that the LED does/doesn't turn on, manually observe the LED behavior. Ensure that it blinks exactly as expected for each test case. These tests measure the bounds of the microphone thresholds and detect noise above a specified level.

INTEGRATION TESTING:

Radio Ultrasound Testing:

  1. Navigate to integration_testing --> ultrasound_radio_testing and open the module in Energia (ultrasound_radio_testing.ino).
  2. Set up a TX Launchpad with a radio and an ultrasound and upload the code with RECEIVING and DEBUG_MODE set to false.
  3. Set up a RX Launchpad with a radio and upload the code with RECEIVING and DEBUG_MODE set to true.
  4. Plug in the transmitting Launchpad after the code starts running on the receiving Launchpad. Verify that the correct number of packets are received and that the final parking state is accurately transmitted and calculated from the valid transmitted distances.

Radio Microphone Ultrasound Testing:

  1. Navigate to integration_testing --> mic_radio_ultrasound_testing and open the module in Energia (mic_radio_ultrasound_testing.ino).
  2. Set up a TX Launchpad with a radio and an ultrasound and upload the code with RECEIVING and DEBUG_MODE set to false.
  3. Set up a RX Launchpad with a radio and upload the code with RECEIVING and DEBUG_MODE set to true.
  4. Plug in the transmitting Launchpad after the code starts running on the receiving Launchpad. Verify that the correct number of packets are received and that the final parking state is accurately transmitted and calculated from the valid transmitted distances. Ensure that the microphone responds to the specified intervals.

FINAL DEMO TESTING:

Parking Sensor Demo:

  1. Navigate to the parking_sensor_demo folder and open the module in Energia (parking_sensor_demo.ino).