Related Experiment Video
Updated: Jun 22, 2026

08:05
Design and Analysis for Fall Detection System Simplification
Published on: April 6, 2020
[Fall detection and reliable device design]
1Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240. zheng.leo.aries@gmail.com
Summary
This study presents a new fall detection method using 3D acceleration and an inclination switch. This approach combines impact detection with orientation warnings to significantly improve fall detection accuracy.
Area of Science:
- Biomedical Engineering
- Wearable Technology
- Sensor Technology
Context:
- Falls are a significant health risk, especially for the elderly.
- Existing fall detection systems often lack accuracy and reliability.
- The need for advanced, reliable fall detection methods is critical.
Purpose:
- To develop an improved fall detection method.
- To enhance the accuracy of fall detection systems.
- To integrate impact detection with orientation pre-warning for better performance.
Summary:
- A novel fall detection method is presented, utilizing three-dimensional acceleration measurements.
- A four-quadrant inclination switch is employed to provide orientation warnings.
- The method combines impact detection with orientation pre-warning for robust fall identification.
Impact:
- The presented method effectively improves the accuracy of fall detection.
- This technology has the potential to enhance personal safety and emergency response.
- The combined approach offers a more reliable solution for monitoring fall events.
Related Concept Videos
Design Consideration
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
The factor of safety is another key aspect...
Types of Errors: Detection and Minimization
Error is the deviation of the obtained result from the true, expected value or the estimated central value. Errors are expressed in absolute or relative terms.
Absolute error in a measurement is the numerical difference from the true or central value. Relative error is the ratio between absolute error and the true or central value, expressed as a percentage.
Errors can be classified by source, magnitude, and sign. There are three types of errors: systematic, random, and gross.
Systematic or...
Absolute error in a measurement is the numerical difference from the true or central value. Relative error is the ratio between absolute error and the true or central value, expressed as a percentage.
Errors can be classified by source, magnitude, and sign. There are three types of errors: systematic, random, and gross.
Systematic or...
Reclosers and Fuses
Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
A comprehensive protection scheme for radial distribution...
Distribution Reliability and Automation
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
Design Example: Resistive Touchscreen
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
Line Protection with Impedance Relays
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
Under normal conditions, low load currents keep the measured...