Electronic Tag Power Switch Circuit for Battery Life Extension
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Solution Overview
Problem
Existing electronic tags have limited service life due to high power consumption from standby, detection, data transmission, and updating processes, primarily powered by button batteries, which exhaust energy quickly, typically lasting about 5 years.
Innovation Solution
An electronic tag with a switch circuit that disconnects power supply when updates are not needed, utilizing a tunneling magnetoresistance (TMR) sensor to connect and disconnect power based on external magnetic field changes, reducing power consumption by only powering the tag during updates and minimizing standby and detection power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic tag continuously powers on for standby, detection, and data transmission, then the tag can respond to updates and maintain communication, but the power consumption increases and service life decreases
Solution Approach 1:
The electronic tag uses periodic action by entering sleep mode during non-update periods and waking up only when update instructions are received. The switch circuit periodically connects or disconnects the power supply module based on update requirements, transforming continuous power consumption into periodic power consumption, thereby extending battery service life while maintaining update responsiveness
Solution Approach 2:
The invention extracts the power supply module from continuous operation by using a switch circuit to disconnect it during non-update periods. This separates the power supply function from continuous operation, allowing the tag to maintain communication capability through magnetic field detection while eliminating unnecessary power consumption during standby and detection phases
2Device complexity
If the electronic tag uses button batteries for power supply, then the device structure remains simple, but the service life is limited to about 5 years due to energy exhaustion
Solution Approach 1:
By implementing periodic power supply control where the power supply module is connected only during update operations and disconnected during non-update periods, the invention extends battery service life from 5 years to over 10 years while maintaining the simple button battery structure without requiring complex power management systems
Solution Approach 2:
The invention changes the operational parameters of the power supply system by controlling the connection state of the power supply module through the switch circuit. This parameter change transforms the power consumption pattern from continuous to periodic, thereby extending battery life while maintaining structural simplicity
3Speed
If the power supply module remains connected during standby and detection, then the tag can quickly respond to updates, but unnecessary power is consumed reducing overall efficiency
Solution Approach 1:
The electronic tag performs preliminary action by detecting magnetic field changes that indicate an approaching update device. When a magnetic field change is detected, the switch circuit automatically connects the power supply module in advance, ensuring the tag is fully operational before the actual update begins, thus maintaining fast response while avoiding continuous power consumption
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
Significantly extends the service life of the electronic tag by reducing overall power consumption, allowing a single button battery to power the tag for more than 5 years with reduced power usage during non-update periods.
Implementation Method 1
the switch circuit comprises a tunneling magnetoresistance (TMR) sensor, which is configured to be turned on or off in response to a change in an external magnetic field
Implementation Method 2
the change in the external magnetic field is generated by a movement of a magnet installed in an external device relative to the electronic tag
Data Source
AI summary
The present disclosure discloses an electronic tag and a control method thereof. The electronic tag comprises: a power supply module configured to supply power to the electronic tag; a display module configured to display a display screen required by the electronic tag; an electronic tag circuit configured to control the electronic tag to operate in a state that the electronic tag is powered by the power supply module; and a switch circuit configured to disconnect the power supply module from the electronic tag circuit when the display screen does not need to be updated.