Low frequency ultrasounds in air are widely used for real-time applications in short-range
communication systems and environmental monitoring, in both structured and unstructured …

A continuous liquid level fiber optic sensor has been devised, developed, and tested. The
sensor is based on two coupled light-diffusing glass fibers. The light from a laser diode is …

In aviation, petroleum and chemical industries and other special areas of production, since
the liquid in containers mostly are flammable, explosive, volatile, and corrosive mixtures, the …

This research was a step forward towards understanding the application and suitability of
sensing technologies to improve construction performance, and to discover the rationale …

In order to solve the problem of remote oil level measurement for unmanned transformers,
this paper proposes an online monitoring technology for transformer oil level based on …

Electrical equipment installed in coal mines or oil fields must fulfil the requirements of anti-
explosive or explosion-proof. The electrical sparks are frequent due to abnormal operations …

In this paper, we first introduced a miniaturized dual excitation laser-coupled intravascular
ultrasound transducer with both a piezoelectric stack and a laser ultrasound transducer …

The transformer used in the conventional ultrasonic ranging system could provide a huge
instantaneous driving voltage for the generation of ultrasonic wave, which leads to the safety …

Electrical equipment installed in coal mines or oil fields must fulfil the requirements of anti-
explosive or explosion-proof. The electrical sparks are frequent due to abnormal operations …

Oil level is one of the important parameters of fault monitoring on power transformers.
Accurate measurement of oil level can reduce the probability of transformer failure caused …