Linear Actuator Identification Using Embedded Parameter Memory
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Solution Overview
Problem
Conventional methods for compensating lead errors in ball screws lack immediate online reading capabilities, leading to uncontrolled deviations and require multiple equipment for various measurements, increasing complexity and cost, and often necessitate manual parameter input, which can cause errors and downtime.
Innovation Solution
A linear actuator system with an elongated shaft, movable module, rolling unit, embedding device, sensing device, and calculation control device, where the memory unit stores parameter data, and the microprocessor determines the sensing device's activation and calculates the actuator's state, eliminating the need for manual input and reducing installation errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lead error data is stored in a 2D barcode on the ball screw surface, then the lead error measurement results can maintain consistency, but immediate online reading is not supported and deviations cannot be detected in real-time
Solution Approach 1:
The patent replaces the mechanical/optical scanning system (2D barcode reading) with an electromagnetic field-based RFID system. The RFID tag stores lead error data and allows wireless real-time reading, eliminating the need for physical scanning and enabling continuous monitoring during operation.
Solution Approach 2:
The patent introduces an RFID tag as an intermediary between the ball screw and the control system. This intermediary stores the lead error data and enables wireless communication, allowing real-time data access without direct contact or line-of-sight requirements.
2Measurement precision
If multiple equipment are used to measure various values such as shaft types and outer diameter, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the RFID tag universal by encoding multiple parameters (shaft type, outer diameter, lead error, etc.) in a single data structure. This single RFID tag replaces multiple measurement devices, as all parameters are stored and can be read simultaneously through one wireless interface.
Solution Approach 2:
The patent combines multiple measurement functions into a single RFID system. Instead of using separate devices for measuring shaft type, outer diameter, and lead error, all these functions are merged into one wireless reading operation that retrieves all parameters from the RFID tag.
3Adaptability or versatility
If manual parameter input is required after installing the ball screw, then flexibility is improved, but parameter input errors occur and cause downtime
Solution Approach 1:
The system performs self-service by automatically reading parameters from the RFID tag during installation. The control unit wirelessly retrieves all necessary parameters (shaft type, outer diameter, lead error) from the RFID tag attached to the ball screw, eliminating manual input entirely. The system configures itself automatically based on the RFID data.
Solution Approach 2:
The parameters are prepared in advance and stored in the RFID tag during manufacturing. This preliminary encoding of all parameters eliminates the need for later manual input, as the data is already available when the ball screw is installed and needs to be configured.
4Measurement precision
If both ends of the connecting wire are marked to distinguish linear actuator types, then correct identification is improved, but installation time and error probability increase due to complicated wiring
Solution Approach 1:
The patent replaces the mechanical marking and visual identification system with an electromagnetic RFID system. Instead of manually checking marks on wires and making connections based on visual cues, the system uses wireless RFID communication to automatically identify the linear actuator type and configure connections without physical inspection or manual wiring decisions.
Data Source
AI summary
A linear actuator and an identification method thereof are characterized in that a memory unit of the embedding device stores the parameter data of the linear actuator, such as the parameters and the axial position of the elongated shaft, and the microprocessor determines whether the sensing device is activated, and through the process of parameter analysis, data transmission, and algorithm calculation, the calculation control device performs an instantaneous calculation to determine the state of the linear actuator, thereby improving the disadvantage of a single function of the conventional technology, avoiding the problem that the unidentified linear actuator causes the abnormality of the sensing device, and effectively finding the problem of abnormal function of the linear actuator.