38 documents found, page 1 of 4

A low-cost and flexible prototype for static and dynamic calibration of pressur...

Digital to analog converter based on pulse-width adding

This paper presents a digital-to-analog converter (DAC) based on the pulse width created naturally by the binary counting sequence. The concept involves combining the counting impulses of the bits to form a pulse-width modulated signal, where the mean voltage is proportional to the input digital code. We propose a circuit capable of achieving this using general-purpose components. Although our design targets 8 ...

Digital to analog converter based on pulse-width adding

This paper presents a digital-to-analog converter (DAC) based on the pulse width created naturally by the binary counting sequence. The concept involves combining the counting impulses of the bits to form a pulsewidth modulated signal, where the mean voltage is proportional to the input digital code. We propose a circuit capable of achieving this using general-purpose components. Although our design targets 8 b...

Gait rehabilitation Assessment Based on Microwave Doppler Radars Embedded in Wa...

Human gait is a complex motion that implies the movement of different parts of the body such as arms, legs and feet, being the functional human movements’ analysis indispensable for bio-mechanical diagnostic and treatment tool for clinics and rehabilitation services. During the rehabilitation process, walkers are frequently prescribed to improve the patient’s stability but can also be transformed into instrumen...

Gait assessment using microwave radars mounted on standard walker

—Gait rehabilitation is a complex process considering the complexity of movement that involves different parts of the human body. To assure the safety of the rehabilitation process walking aids are a common indication in clinics, the standard walker being one of the most prescribed taking into account its stability. Embedding sensors on the level of the walker can provide additional capabilities associated with...

Towards a digital twin for vineyard farms

Smart systems have increasingly sought more applications in agriculture. With the advent of climate change and the understanding on the impact that intensive agricultural practices have on the environment, a more responsible and precise use of resources has gained focus on the farming community. The design of a Digital Twin for horticulture that may be able to monitor plants growth, plants physiology and contro...

Balanced Scorecard: A Powerful Method to Improve the Management of Educational ...

Teaching, learning and education are the main activities related with any higher education institution (HEI), be they public or private. In this context, the balanced scorecard (BSC) is a powerful method that helps the successful application of performance measurements in terms of the efficiency of the programs, processes and people of any educational institution. The key performance indicators (KPI) are crucia...

Software Based Sigma-Delta Converter with Auto-Calibration Capabilities

This paper presents a software based sigma-delta converter. The proposed A/D converter represents a lowcost and flexible digitalization solution that can be used in a large number of applications. The proposed discrete A/D converter tasks, that are performed by a microcontroller, include: digital filtering, oversampling, noise shaping and decimation. A simple implementation of the digital filtering is easily im...

Industrial Internet of the Things

Sensor Communication Interfaces and Standards

The chapter talks about the interfaces used to communicate with sensors and the standards available to channel data to higher logical levels. These communication interfaces and standards aim at abstracting the sensor layer in order to achieve interoperability at the layers above. Two standards are covered in detail: the IEEE 1451 standard that defines a smart transducer interface for sensors and actuators, and ...