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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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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...
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Resistivity01:22

Resistivity

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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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Non-ohmic Devices

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
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Resistance01:19

Resistance

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When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
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Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Fabrication and Testing of Photonic Thermometers
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Ionic Thermoelectric-Powered Resistive Sensors.

Mingna Liao1,2, Hongting Ma3, Nan Zhu3

  • 1Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping, SE-601 74, Sweden.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 16, 2024
PubMed
Summary
This summary is machine-generated.

Ionic thermoelectric supercapacitors (ITESCs) can power sensors using temperature changes. This research shows ITESCs can autonomously operate resistive sensors, like humidity monitors, by converting heat into electricity.

Keywords:
ionic thermoelectric supercapacitorpower supplyingresistive sensor

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Area of Science:

  • Thermoelectric energy conversion
  • Supercapacitor technology
  • Portable sensor systems

Background:

  • Ionic thermoelectric supercapacitors (ITESCs) exhibit a high ionic Seebeck coefficient for thermal-to-electrical energy conversion.
  • Existing sensor systems often require external power sources, limiting portability and autonomy.

Purpose of the Study:

  • To demonstrate the direct operation of resistive sensors using the electrical current generated by ITESCs.
  • To explore the potential of ITESCs for self-powered, portable sensing applications.

Main Methods:

  • Utilizing the charging and discharging currents from ITESCs.
  • Applying a periodic temperature gradient to the ITESC to generate power.
  • Operating a resistive sensor directly with the ITESC-generated current for humidity monitoring.

Main Results:

  • Successfully demonstrated that ITESCs can generate sufficient current to operate resistive sensors.
  • Showcased autonomous humidity monitoring powered solely by a temperature gradient applied to an ITESC.
  • Highlighted the potential for leveraging residual environmental heat for continuous sensor operation.

Conclusions:

  • ITESCs offer a viable pathway for self-powered portable sensors by converting thermal energy into usable electrical current.
  • The direct utilization of ITESC charging/discharging currents simplifies sensor system design.
  • Autonomous operation of humidity sensors using ITESCs presents a promising solution for remote and low-power monitoring.