Wireless Sensor Access Control for Fluid Spindle Machining Centers
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Solution Overview
Problem
Current machine control systems in machining centers are unable to sufficiently determine the operating condition of fluid-driven spindles, such as rotational speed, which hinders safe access to the enclosure when these spindles are not directly powered through the system.
Innovation Solution
Incorporating a sensor module with wireless communication capabilities to monitor the operating conditions of fluid-driven spindles, transmitting this information to a machining center controller, which adjusts functions like the door latch position based on predetermined access criteria, ensuring safe access when the spindle meets specified conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired machine control system is used to monitor spindle operation, then the system can reliably determine operating conditions, but the system complexity increases and wireless fluid-driven spindles cannot be monitored
Solution Approach 1:
The patent replaces the wired mechanical/electrical connection system with a wireless communication system. Sensors mounted on the spindle housing detect rotational position and transmit signals wirelessly to the control system, eliminating the need for direct wired connections while maintaining monitoring capability.
Solution Approach 2:
The patent introduces wireless transmitters and receivers as intermediary devices between the spindle and control system. These intermediaries enable communication without direct physical connections, allowing fluid-driven spindles to be monitored reliably without increasing system complexity through wiring.
2Object-affected harmful factors
If the door latch is locked during spindle operation, then operator safety is ensured, but access to the enclosure is prevented even when the spindle has stopped
Solution Approach 1:
The patent implements a feedback mechanism where sensors continuously monitor spindle rotation and provide real-time information to the control system. The latch is dynamically controlled based on this feedback - locked when rotation is detected, unlocked when the spindle has stopped, enabling both safety and convenient access.
Solution Approach 2:
The patent makes the latch system dynamic rather than static. The latch position changes automatically based on spindle operation status, transitioning from locked to unlocked state when the spindle stops rotating, thereby balancing safety requirements with operational convenience.
3Adaptability or versatility
If wireless sensors are used to monitor fluid-driven spindles, then the system can adapt to different spindle types, but the measurement precision may be reduced compared to wired systems
Solution Approach 1:
The patent uses non-contact optical sensors that create an optical copy or representation of the spindle's rotational state. The sensors detect changes in light reflection or interruption patterns caused by rotating features on the spindle, accurately determining operational status without physical contact or wired connections.
Data Source
AI summary
A machining center having at least one door to control access to an enclosure thereof, where access through the door is provided by an unlocked latch, and the latch is unlocked based on wirelessly communicated signals relaying information about at least one operating condition of a fluid driven cutting tool spindle in use within the machining center.