Smart Laser Distance Meter
Team
- E/21/065, CHAMOD S.A.R., email
- E/21/068, CHANDRASIRI E.M.D.D.V, email
- E/21/277, PADUKKA V.K., email
- E/21/325, RASHMIKA W.B.R., email
Table of Contents
- Introduction
- Solution Architecture
- Hardware & Software Designs
- Testing
- Detailed budget
- Conclusion
- Links
Introduction
Accurate indoor measurement and floor plan creation are essential in construction, interior design, and architectural planning. Traditional manual measuring methods are time-consuming, error-prone, and require manual sketching.
This project proposes a Smart Laser Distance Meter that integrates LiDAR-based distance sensing and inertial measurement to provide precise linear measurements, angle detection, and automatic area and volume calculations. The system further enables real-time 2D wall and floor plan generation, eliminating manual sketches and improving efficiency and accuracy.
Solution Architecture
The system consists of a handheld embedded device and a mobile application. The embedded unit performs distance and orientation sensing, processes data using a microcontroller, and transmits results wirelessly to the mobile app.
High-level flow:
- LiDAR sensor measures distance
- IMU provides orientation and angle data
- ESP32 processes and filters data
- Bluetooth transfers data to mobile app
- Mobile app generates sketches and calculations
Hardware and Software Designs
Hardware Design
- ESP32 CP2102 Type-C development board
- LiDAR DToF range finder (up to 20 m)
- MPU6050 IMU (3-axis accelerometer & gyroscope)
- 0.96” OLED display (I2C)
- Red line laser modules for alignment
- Buzzer and vibration motor for feedback
- 18650 battery with TP4056 charging module
- Custom PCB and 3D-printed enclosure
Software Design
- Sensor interfacing and calibration
- Distance and angle computation
- Bluetooth communication protocol
- Mobile application for visualization, storage, and export
Detailed budget
All items and costs
| Item | Quantity | Unit Cost | Total |
|---|---|---|---|
| DTS6012M LiDAR Sensor | 1 | 6000 LKR | 6000 LKR |
| BNO055 9-Axis IMU Module | 1 | 4000 LKR | 4000 LKR |
| ESP32 CP2102 Dev Board | 1 | 1500 LKR | 1500 LKR |
| Green Laser (5 mW) | 1 | 1500 LKR | 1500LKR |
| 18650 Li-ion Battery | 2 | 1400 LKR | 2800 LKR |
| 1.8” TFT LCD Display (MD0260) | 1 | 1000 LKR | 1000 LKR |
| TP4056 Charger + Boost conv. | 1 | 1000 LKR | 1000 LKR |
| Coin Vibration Motor | 1 | 200 LKR | 200 LKR |
| 2x18650 Batttery Holder | 1 | 150 LKR | 150 LKR |
| Active Buzzer | 1 | 100 LKR | 100 LKR |