Related Experiment Video
Updated: Jan 29, 2026
08:20
In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
7.4K
Research on a Self-Powered Vibration Sensor for Coal Mine In Situ Stress Fracturing Drilling
Jiangbin Liu1,2, Mingzhong Li3, Chuan Wu4
1Coal Mining Branch, China Coal Research Institute, Beijing 100013, China.
Micromachines
|January 28, 2026
Summary
This study introduces a self-powered vibration sensor for coal mine drilling, utilizing a triboelectric nanogenerator. The sensor enhances safety and efficiency by reliably measuring vibrations and generating its own power.
Area of Science:
- Engineering
- Materials Science
- Energy Harvesting
Background:
- Downhole vibration data is crucial for coal mine drilling efficiency and safety.
- Current vibration detectors face limitations in energy supply, impacting performance and cost.
Purpose of the Study:
- To develop a self-powered vibration sensor for coal mine in situ stress fracturing drilling.
- To address limitations of traditional sensors in terms of energy supply and operational efficiency.
Main Methods:
- A triboelectric nanogenerator-based self-powered vibration sensor was designed and fabricated.
- The sensor was engineered to detect both axial and lateral vibration frequencies with redundant units for reliability.
- Environmental resilience testing was conducted under high temperature and humidity conditions.
Main Results:
- The sensor accurately measures vibration frequencies from 0 to 11 Hz with under 4% error.
- It operates reliably in harsh environments (up to 150 °C, 90% humidity).
- The device demonstrates self-powering capabilities, generating up to 68 V and 3.8 × 10⁻⁷ W power.
Conclusions:
- The proposed self-powered sensor offers a reliable and efficient solution for downhole vibration monitoring in coal mines.
- Its self-generation capability and robust performance make it suitable for practical drilling applications, reducing operational costs.
More Related Videos
15:11Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling
Published on: January 5, 2015
65.0K
10:27A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
Published on: June 12, 2019
9.1K
Related Concept Videos
01:19Vibrating Concrete
393
Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
393
01:08Power
13.0K
The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
13.0K
01:27Fractures: Bone Repair
5.3K
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
5.3K
01:24IR Spectroscopy: Molecular Vibration Overview
4.7K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
4.7K
01:22Instantaneous Power
906
Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
906
01:14Complex Power
902
Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
902