Weight-Estimation

📝 Problem Statement

At a last mile hub, setup a tool or application that has the ability to measure the dimensions (length, breadth and height) and capture volumetric weights by image, depth or any sensory processing as required. The tool will scan an item placed before it one by one, and estimate the volumetric weight provided that same items are expected to have similar volumetric weight.

Tool will be assisted with a barcode or qr scanner to identify the items (with barcoding or qr code scanning not being the scope of the problem). If similar items do not have the weight or dimensions within a range of accepted error, such items should be flagged as erroneous.

💀🏋️ Dead Weight Estimation

🧰 Components Used

Item Name	Purpose	Qty
Arduino Nano	Central Processing Unit	1
Weighing Load Cell	Converts force into electric signal (transducer)	4
Hx711 Weight Pressure Sensor	Amplification of electrical signals	1
Liquid Crystal Display 1602	Output	1
12V Li-Ion Battery	Input Power Supply	1
12V to 3.3V Voltage Convertor	Stepping-down voltage	1
Wires and PCB	Connection	-

🛠️ Circuit Diagram

⚙️ Physical Setup of Weight Machine

Top-View of the Weight Machine (315 grams Multimeter being measured)

Side-View of the Weight Machine (Load cells at bottom of the plate)

🚰 Volumetric Weight Estimation

🧰 Components Used

Item Name	Purpose	Qty
Arduino Nano	Central Processing Unit	1
SHARP Infrared Sensor[GP2Y0A41SK0F]	Distance Measuring Sensor	1
Liquid Crystal Display 1602	Output	1
12V Li-ION Battery	Input Power Supply	1
12 V to 3.3 V Voltage Converter	Stepping-down Voltage	1
Wires and PCB	Connection	1

Running the container:

1. cd '.\Volumetric Weight Estimation\'
2. docker build -t weight_estimation .
3. docker run -d -p 5000:5000 weight_estimation2

API Documentation:

1. Get Volume and other details from an image file:

• URL: http://localhost:5000/volume/fromFile

• Method: POST

• Request

  The request body should contain a payload of type form-data having the following properties:

  key	value
  file	image (file buffer)

  Supported image formats include png, jpg and jpeg.

• Success Response:

  • Code: 201
    Content:

    {
      "area": float,
      "breadth": float,
      "length": float
    }

• Error Response:

  • Code: 406
    Content:

    {
      "message": "Poor Lightning Conditions, Fix and Try Again"
    }

  • Code: 400

    {
      "message": "No file part in the request"
    }

2. Get Volume and other details from Base64-encoded string:

• URL: http://localhost:5000/volume/fromBase64

• Method: POST

• Request

  The request body should contain a json payload having the following properties:

  key	value
  file	Base64-encoded string of the image's data

• Success Response:

  • Code: 201

    {
      "area": float,
      "breadth": float,
      "length": float
    }

• Error Response:

  • Code: 406

    {
      "message": "Poor Lightning Conditions, Fix and Try Again"
    }

  • Code: 400

    {
      "message": "JSON payload not found"
    }