Digital Track Recorder Coordinate Calibration via Dual OID Sensors
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Solution Overview
Problem
Existing digital track recording devices face position deviation issues due to errors between paper grooves and actual paper size, as well as manual operation-induced dislocation and rotation, leading to inaccuracies in data recording.
Innovation Solution
A coordinate calibrating method using two OID sensors to read paper coordinates, calculate inclination angles, and correct pen coordinates through translation and rotation to align with pre-designed standard positions, ensuring accurate data recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a groove structure is provided to fix paper position, then paper placement convenience is improved, but position deviation still occurs due to manufacturing errors and manual operation
Solution Approach 1:
The patent applies preliminary action by pre-defining standard coordinates on the paper and pre-calculating transformation parameters (translation and rotation) before actual tracking begins. The coordinate calibration is performed in advance by comparing standard coordinates with actual sensor readings, establishing correction relationships that will be used during subsequent writing operations.
Solution Approach 2:
The patent implements feedback by continuously comparing the actual coordinates read by sensors with the pre-defined standard coordinates, calculating deviations, and applying real-time correction through coordinate transformation. The system uses the deviation information to adjust the coordinate mapping, ensuring that tracked positions accurately correspond to physical paper positions despite manufacturing or placement variations.
2Adaptability or versatility
If manual paper replacement is allowed, then paper usability is improved, but coordinate deviation occurs due to dislocation and rotation during replacement
Solution Approach 1:
The patent applies dynamics by making the coordinate transformation parameters adaptive rather than fixed. The system dynamically calculates translation and rotation parameters based on the actual paper position detected by sensors, allowing the coordinate system to adjust to different paper placements. This enables the system to accommodate manual paper replacement while maintaining coordinate accuracy through real-time parameter recalculation.
3Measurement precision
If OID sensors are used to detect paper position, then position detection capability is improved, but coordinate calibration complexity increases due to inclination angle calculation and transformation
Solution Approach 1:
The patent replaces complex mechanical calibration mechanisms with computational methods. Instead of using physical adjustment mechanisms to align coordinates, the system uses mathematical calculations involving inclination angles and coordinate transformations. The calibration process is achieved through software algorithms that compute translation and rotation parameters based on sensor readings, eliminating the need for complex mechanical adjustment systems.
Data Source
AI summary
A coordinate calibrating method includes the steps of: (1) reading paper coordinates by adopting two OID sensors, comparing the coordinates read by the two OID sensors with pre-designed coordinates of paper to obtain coordinate deviation of positions of the two OID sensors, and according to the coordinate deviation, calculating an inclination angle value θ generated by the coordinates of the two OID sensors; and (2) according to the coordinate deviation and the inclination angle value, calibrating an actually read coordinate position of a pen by selecting the second OID sensor as a reference point, translating horizontally and vertically coordinates of the pen to be corrected first, and then rotating the coordinates by the angle θ with reference to the second OID sensor, so that the positions of the two OID sensors coincide with pre-designed standard positions, and the coordinate position of the pen is calibrated.