Smart Label Capacitive Wake-Up Circuit for Energy Saving
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Solution Overview
Problem
Existing smart labels face challenges with energy efficiency and data accuracy due to early activation before being applied to the object being monitored, leading to unnecessary energy consumption and potentially falsified data.
Innovation Solution
The integration of a capacitive sensor connected to an electronic circuit with a wake-up circuit allows the label to remain in an energy-saving mode until it is correctly attached to an object, activating only when the label detects capacitive changes indicative of attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery is activated as soon as the label is manufactured, then the label is ready for immediate use, but unnecessary energy is lost before the label is applied to the object
Solution Approach 1:
The label is prepared in advance with all components in place, but the power supply is activated only when needed through the wake-up circuit triggered by capacitive sensor detection of the object's presence
Solution Approach 2:
The power supply state transitions from static (always on or always off) to dynamic, switching between sleep mode and active mode based on whether the label detects the presence of an object through capacitive coupling
2Productivity
If the label is activated before being applied to the object, then data recording begins early, but temperature or acceleration measurements are recorded that are not representative of the actual transport process
Solution Approach 1:
The capacitive sensor continuously monitors for the presence of an object and provides feedback to the wake-up circuit, which then activates the main electronic circuit and sensors only when the object is detected
Solution Approach 2:
The capacitive sensor and wake-up circuit are prepared in advance to detect object presence, ensuring that the main measurement system activates at the precise moment the label is applied to the object
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution significantly extends battery life by consuming energy only when the label is in use, ensures accurate data recording by preventing premature activation, and allows for precise recognition of the object's material, enhancing data quality and application flexibility.
Implementation Method 1
the capacitive sensor is designed to detect capacitive changes when the label is stuck onto the object
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Label (1) for application to an object, comprising a carrier layer (2), an adhesive layer (4) arranged on the carrier layer for attaching the label to a surface of the object, a removable cover layer (5) covering the adhesive layer, an electronic circuit (3), a temperature sensor and/or acceleration sensor connected to the electronic circuit for detecting temperature or acceleration measurements, such as the ambient temperature and/or the surface temperature of the object, an antenna connected to the electronic circuit, wherein the electronic circuit includes a transmit/receive module for transmitting data, such asthe temperature and/or acceleration measurement values, via the antenna, and a battery for powering the electronic circuit, characterized in that a capacitive sensor is provided which is connected to the electronic circuit and is designed to detect capacitive changes when the label is affixed to the object, that the electronic circuit has a wake-up circuit to switch it from an energy-saving mode to an operating mode, and that the capacitive sensor interacts with the wake-up circuit in such a way that the electronic circuit is set to operating mode when the affixing of the label to the object is detected.