Ultrasonic Distance Measuring Device with Computational Capabilities

Technical Field:
This innovation pertains to an ultrasonic distance measuring device, specifically designed for calculating materials in construction and interior decoration applications.

Background Technology:
Current ultrasonic distance measuring technologies, including phase and pulse echo methods, often yield inaccuracies due to factors such as ultrasonic beam diffusion, non-target object reflections, and environmental influences like air disturbances and temperature variations. Moreover, existing devices lack computational functionalities, hindering the calculation of areas, volumes, and material quantities based on distance data.

Overview:
The purpose of this device is to address the limitations of existing ultrasonic distance measuring tools by offering a versatile, interference-resistant, high-precision solution with computational capabilities. Notably, it can calculate material quantities based on distance measurements and a unit material consumption database, doubling as a multi-functional calculator.

Technical Components:
1. Housing: Protective casing for internal components.
2. Ultrasonic Transceiver:Positioned in the upper part for sending and receiving ultrasonic waves.
3. Display:Located in the middle section for presenting measurement results.
4. Keyboard:Positioned in the lower part for user input.
5. Internal Components:Including ultrasonic transmission circuit, programmable gain amplifier (PGA), variable threshold trigger, microcontroller-based computational circuit, and temperature detection circuit.

The microcontroller-based computational circuit receives inputs from the ultrasonic transmission circuit, variable threshold trigger, keyboard, and temperature detection circuit. Its outputs are connected to the PGA and the display.

The ultrasonic transceiver's wiring terminals connect to the ultrasonic transmission circuit and the PGA. The PGA's output is linked to the input of the variable threshold trigger.

Computational Circuit:
The PGA consists of operational amplifiers (OP-AMPs) 61 and 62, analog switches 63, 64, 65, resistors R1 to R12, and capacitors C1 to C8. The variable threshold trigger 7 includes a trigger, a transistor Q1, resistors R13 to R17, capacitors C9, C10, C11, and is connected to the output of the PGA.

Keyboard:
The keyboard features a measurement key, a backlight key, and a 5x5 matrix of keys. It includes upper and lower mode conversion keys and various function keys for both modes.

Functional Keys:
- Upper Mode: Clear, Off, Gravel, Tile, Brick, Block, 4x8Sheet, Paint, Wallpaper, Bd Feet, Studs, Roof Bundie.
- Lower Mode: On/C, Arithmetic keys (+, -, ×, ÷, =), Numeric keys (0-9, ·), Length units conversion keys (Feet, Inch, Met), Storage keys (Store, M1, M2, M3), Light.

Operation:
Upon activation, the ultrasonic transmission circuit emits pulses controlled by the microcontroller. Reflected echoes are received by the ultrasonic transceiver, amplified by the PGA, and processed by the variable threshold trigger. The microcontroller records the time data, calculates the distance, and displays the result. The device can store and compute multiple distance measurements for length, width, and height, providing parameters like area, volume, and material quantities.

Conclusion:
ERDI TECH LTD's Ultrasonic Distance Measuring Device with Computational Capabilities is an advanced solution, ensuring precise measurements and computational functionalities for material calculations in construction and interior decoration applications. Its innovative design and resistance to interference make it a valuable tool for diverse scenarios.

To learn more about the rangefinder industry, visit www.erdicn.com

Figure 5