Transformerless Ultrasonic Ranging System with the Feature of Intrinsic Safety for Explosive Environment.

Area of Science:

• Electrical Engineering
• Sensor Technology
• Safety Engineering

Background:

• Conventional ultrasonic ranging systems utilize transformers, posing safety risks in explosive atmospheres due to high voltages.
• There is a need for safer, reliable ultrasonic ranging solutions in potentially explosive environments.

Purpose of the Study:

• To develop and evaluate a transformerless ultrasonic ranging system powered by an intrinsically safe source.
• To analyze the safety and performance characteristics of the proposed system under normal and fault conditions.

Main Methods:

• Implementation of a transformerless driving circuit using analog switches and an intrinsically safe power source.
• Integration of an echo-processing circuit with Local Interconnect Network (LIN) bus technology for enhanced stability.
• Experimental evaluation of ranging accuracy and stability through timing diagram analysis.

Main Results:

• The system achieved reliable bidirectional communication between the LIN master node and the ultrasonic transceiver.
• Transformerless driving was successfully implemented, eliminating safety concerns associated with conventional transformers.
• Accurate distance measurements were achieved within a range of 250-2700 mm, with errors less than 30 mm and fluctuations under 10 mm.

Conclusions:

• The proposed transformerless ultrasonic ranging system provides a safe and effective solution for applications in potentially explosive atmospheres.
• The system demonstrates high reliability, accuracy, and stability, making it suitable for hazardous environments.
• This innovation offers a new approach to ultrasonic sensing where safety is paramount.