A sensor for in vivo biomechanical characterization of buttock soft tissue has been developed and evaluated. The sensor measures interface pressure, applied force, tilt, and rotation angle of the sensor head, and the thicknesses of multiple soft tissue layers. A composite ultrasonic transducer using a 1-3 ceramic-polymer structure was developed for the sensor. The sensor can identify subcutaneo...

An intelligent light emitting diode (LED) dimming system is designed and implemented for energy-saving lighting systems. An LED light bulb is powered by an LED driver controlled by a microcontroller using pulse width modulation (PWM) signals. By changing the duty cycle of the PWM signals, the LED driver generates a driving current of up to 1,000 mA. The current consumption by the LED light bulb...

In this work, an analysis of the transmission of ultrasonic signals generated by piezoelectric sensors for air applications is presented. Based on this analysis, an ultrasonic response model is obtained for its application to the recognition of objects and structured environments for navigation by autonomous mobile robots. This model enables the analysis of the ultrasonic response that is gener...

Road safety has been an important concern in the world over the past few years since millions of people die every year because of car accidents and many more are injured. The wireless communication technologies enabled vehicles on a highway to communicate in order to share vehicle state information and information to avoid potential collision. Here, a protocol which avoids vehicle accidents is ...

Monolithic piezoelectric sensors commonly used for acoustic emission and ultrasonic inspection are non-conforming, bulky, costly and heavy. This means they do not fit well to complex geometries, they can be susceptible to damage, and on larger structures their cost and weight can be prohibitive. An alternative to this is the use of piezo-electric thick films, which comprise of piezo-electric pa...

Magnetostrictive linear position sensors (MLPS) are high-precision sensors used in the industrial field for measuring the propagation time of ultrasonic signals in a waveguide. To date, MLPS have attracted widespread attention for their accuracy, reliability, and cost-efficiency in performing non-contact, multiple measurements. However, the sensor, with its traditional structure, is susceptible...

This paper presents a new type of ultrasonic gas molecule concentration sensor for rescue robotics and the performance of developed sensor is investigated by applying as human breath gas measurement sensor. This devise can measure the change of the gas concentration with a sampling rate of 400 kHz. Ideal gas experiment results show that the proposed sensor could detect the difference between 5%...

The paper addresses features extraction of sensor data for robot behavior learning using factor analysis. Redundancies in sensor types and quantities are common in sensing competence of robots. The redundancies cause the high dimensionality of the perceptual space. It is impractical to incorporate all available sensor information in decision-making and learning of robots due to the huge memory ...

Banjarmasin is a city of thousand rivers, floods often occur due to high tides and accompanied by rain. An early warning system needed for monitoring predicting river tides, especially in rivers that are prone disasters. This study aims develop an water levels using IoT linear regression analysis. The research method through the manufacture NodeMCU V3 device , Microcontroller, Ultrasonic A02YYU...

Simultaneously localization and mapping (SLAM) is a fundamental topic in robotics and mobile computing communities. Owning to low cost and relatively accurate measurement, ultrasonic sensors are widely used in range only SLAM applications. But these applications are challenging to accurately obtain an initial position given to the SLAM algorithm, and robustly localize the targets in a highly dy...