Lathe RFID Workspace Monitoring for Long-Range Tool Identification
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Solution Overview
Problem
Current RFID-based tool identification systems in machining environments face limitations such as short transmission distances, risk of collisions, pollution, and low data transmission rates, requiring direct proximity and multiple units for communication, which restricts universal data collection and efficient operation.
Innovation Solution
Implementing a decentralized RFID transmission/reception unit operating in the ultra-high frequency spectrum (433 MHz to 5800 MHz) for contactless communication with RFID transponders, allowing for extended range monitoring and simultaneous data exchange across the lathe's work space, reducing the need for multiple units and enhancing data transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID transponder and transmission/reception unit are placed in immediate proximity for communication, then data transmission is enabled, but transmission distance is limited to a few centimeters and alignment must be precise
Solution Approach 1:
The patent changes the operating frequency parameter from traditional low-frequency (125-455 kHz) RFID to ultra-high frequency (433 MHz to 5800 MHz). This parameter change enables electromagnetic radiation-based communication with transmission distances of several meters instead of centimeters, while maintaining reliable data transmission through the use of frequency bands approved by regulatory authorities
2Ease of operation
If transmission/reception unit is arranged directly on the tool absorption for identification, then tool identification is possible, but risk of collisions with machine parts or workpieces increases
Solution Approach 1:
The patent extracts the transmission/reception unit from direct contact with tools and places it in a fixed position above the machine bed. This separation eliminates the collision risk while maintaining tool identification capability through the extended transmission range enabled by ultra-high frequency electromagnetic radiation
3Extent of automation
If transmission/reception unit is placed in work space for monitoring, then real-time monitoring is possible, but risk of pollution from process waste increases
Solution Approach 1:
The patent extracts the transmission/reception unit from the immediate work space where chips and lubricant are present and positions it above the machine bed. The extended electromagnetic transmission range allows monitoring without direct exposure to harmful factors, while real-time automation is maintained through continuous electromagnetic field monitoring
4Loss of information
If low-frequency RFID with inductive coupling is used, then data transmission is possible, but data transmission rate is low and transmission distance is limited
Solution Approach 1:
The patent changes the frequency parameter from low-frequency (125-455 kHz) to ultra-high frequency (433 MHz to 5800 MHz) RFID electromagnetic radiation. This enables significantly higher data transmission rates and extends transmission distance to several meters while maintaining reliable data communication between transponders and the transmission/reception unit
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
Enables real-time monitoring and quick communication with multiple transponders, preventing collisions and pollution, and ensuring secure data transmission over longer distances, thus improving operational efficiency and safety in machining processes.
Implementation Method 1
at least an RFID transponder (2) with at least one stored characteristic value is assigned to an interchangeable machine section (12, 33) and/or hand tool (H). In addition, at least an RFID transmission/reception unit (S1) is arranged decentrally above the machine bed (D2) for monitoring the work space (A) in such a way that at least one characteristic value using electromagnetic coupling and with electromagnetic radiation, at least of the ultra-high-frequency spectrum
Data Source
Figure 1
Figure 2
AI summary
The lathe (D) according to the invention has a working space (A) above a machine bed (D2) which contains at least one interchangeable machine part (D12, D33) and/or hand tool (H) on or above the machine bed (D2). According to the invention, at least one RFID transponder (S21, S22, S23) is assigned to a machine part and/or hand tool for a characteristic value. Via an RFID transmitter/receiver unit (S1a, S1b, S1c), arranged decentrally above the machine bed for monitoring the work area, a characteristic value can be queried contactlessly from an RFID transponder by means of electromagnetic coupling. A control unit (S) specifies a control variable for the lathe depending on this. The invention enables real-time monitoring of the entire workspace and rapid communication with multiple transponders. Querying them enables the control unit to determine whether or not the machine parts or hand tools in the work area are approved or not, or whether parts that are required for operation are missing. If necessary, the identification values can be assigned to process parameters stored in the controller. These can be automatically specified as control variables for the lathe, so that manual input of process parameters that do not correspond to a machine part can be avoided.