Wireless Sensor Tag Identification for Interference-Free Data Collection
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Solution Overview
Problem
In factory automation, the increasing number of sensors for detailed control leads to complex wiring issues for data collection, and existing wireless sensor systems fail to efficiently manage communication and data collection from multiple sensors without causing interference or delays.
Innovation Solution
A wireless sensor system with RF tags and a communication device that uses identification information to designate specific sensor tags for data collection, allowing them to generate and transmit measurement data only when conditions are met, thereby avoiding interference and optimizing data collection timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more sensors are arranged to collect more measurement data, then measurement detail and control precision are improved, but wiring complexity and device complexity increase
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless communication system. Sensor tags transmit measurement data to the control device wirelessly using radio frequency communication, eliminating the need for physical wiring connections between each sensor and the control device.
Solution Approach 2:
The control device is designed to handle multiple functions: it manages communication establishment with multiple sensor tags, performs state monitoring, collects measurement data from various sensors, and controls different machinery. This multi-functional design reduces the need for separate dedicated systems for each sensor.
2Productivity
If a common device collects data from multiple wireless sensors, then data collection efficiency is improved, but communication interference and standing waves increase
Solution Approach 1:
The patent segments the communication process into distinct phases: communication establishment phase and data collection phase. During data collection, the system uses predetermined timings for each sensor tag to transmit data sequentially, preventing simultaneous transmission and reducing interference.
Solution Approach 2:
The system implements periodic communication cycles where the control device first establishes communication with sensor tags, then collects data at predetermined intervals. Each sensor tag transmits data at specific periodic timings assigned to it, avoiding overlapping transmissions.
3Reliability
If communication establishment is performed with each wireless sensor, then reliable data collection is ensured, but communication time and system complexity increase
Solution Approach 1:
The control device performs communication establishment with sensor tags in advance before actual data collection begins. This preliminary action ensures that all communication channels are ready and validated, allowing subsequent data collection to proceed efficiently without repeated establishment overhead.
Solution Approach 2:
Once communication is established, the system maintains continuous data collection operations without repeatedly breaking and re-establishing communication. The predetermined timing mechanism ensures continuous, uninterrupted data flow from all sensor tags.
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 approach enables efficient and interference-free data collection from multiple sensors, simplifying the arrangement and management of sensor systems, and improving response times in real-time data transmission.
Implementation Method 1
Each of the one or more sensor tags is configured to receive a measurement signal from one or more sensor circuits and generate measurement data on the basis of the measurement signal
Implementation Method 2
a communication device configured to wirelessly communicate with one or more sensor tags
Data Source
AI summary
A wireless sensor system includes a sensor tag configured to include a radio frequency tag and a communication device configured to wirelessly communicate with one or more sensor tags. Each of the sensor tags is configured to receive a measurement signal from one or more sensor circuits and stores identification information capable of being distinguished from other sensor tags. The communication device includes a transmission means configured to transmit a command signal to the one or more sensor tags and the command signal includes designation information for designating a sensor target serving as an object. Each of the sensor tags generates measurement data on the basis of the measurement signal if the designation information included in the command signal received from the communication device matches its own stored identification information and starts transmission of a response signal including the generated measurement data when a predetermined response start condition is satisfied.