Recording Apparatus Sonic Distance Sensor Vibration Compensation
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Solution Overview
Problem
Existing recording apparatuses face challenges in accurately measuring the distance between a recording unit and a recording target medium due to vibrations, particularly when using sonic distance sensors, which can lead to insufficient detection precision and issues like a rise in the recording target medium.
Innovation Solution
A recording apparatus that incorporates a sonic distance sensor and a vibration sensor, with the vibration sensor detecting and compensating for vibrations affecting the sonic distance sensor, allowing for high-precision distance measurement by selectively using either a sonic or optical distance sensor based on the type of recording medium, and featuring a movement section that intersects with the transportation direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sonic distance sensor is used to measure the distance between the recording unit and the recording target medium, then the measurement can be performed, but the detection precision is insufficient due to vibrations
Solution Approach 1:
A vibration sensor is introduced as an intermediary device to detect vibrations of the sonic distance sensor. The vibration sensor serves as a mediator between the harmful vibration factor and the distance measurement system, allowing the control unit to identify and discard erroneous measurements caused by vibrations, thereby resolving the contradiction between performing distance measurement and maintaining precision despite vibrations
Solution Approach 2:
The vibration sensor provides feedback information about the vibration state of the sonic distance sensor to the control unit. This feedback mechanism enables the system to monitor the quality of measurements in real-time and selectively discard erroneous data points caused by vibrations, maintaining measurement precision despite the presence of harmful vibration factors
2Measurement precision
If an optical distance sensor is used to measure the distance, then the measurement can be performed, but sufficient detection precision cannot be obtained for transparent recording target media
Solution Approach 1:
The system employs both a sonic distance sensor and an optical distance sensor, allowing it to adapt to different types of recording target media. The sonic sensor is particularly effective for transparent media where optical sensors fail, while the optical sensor can be used for other media types, thus achieving universal applicability across different media while maintaining high measurement precision
Solution Approach 2:
The system changes the measurement parameter approach by switching between sonic and optical measurement methods depending on the media type. For transparent recording target media, the system uses sonic wave propagation parameters, while for other media, it uses optical parameters, thereby achieving both high precision and broad adaptability
3Measurement precision
If a vibration sensor is added to detect and compensate for vibrations, then detection precision is improved, but the device complexity increases
Solution Approach 1:
The vibration sensor monitors the vibration state of the sonic distance sensor and provides information to the control unit for automatic filtering of erroneous measurements. This self-service mechanism allows the system to automatically compensate for vibrations without requiring complex external intervention or sophisticated vibration cancellation hardware, thus improving precision while limiting the increase in device complexity
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 configuration enables precise measurement of the distance between the recording head and the recording target medium, effectively reducing problems caused by a rise in the medium by discarding vibration-affected readings and utilizing the most suitable sensor type for the medium, thereby enhancing detection precision and accuracy.
Implementation Method 1
a vibration sensor that detects vibrations of the distance sensor
Implementation Method 2
a sonic distance sensor... An optical distance sensor is commonly used as a sensor that can measure a distance between a recording unit and a recording target medium in a recording apparatus. Besides an optical distance sensor, a sonic distance sensor disclosed in JP-A-5-097284 is known as a type of a distance sensor.
Data Source
AI summary
A recording apparatus includes: a transportation unit that transports a recording target medium; a recording unit that performs recording on the recording target medium transported by the transportation unit; a sonic distance sensor; a vibration sensor that detects vibrations of the distance sensor; and a movement unit that moves in an intersecting direction, which intersects with a transportation direction of the recording target medium. The recording apparatus having this structure can reduce problems caused by a rise in the recording target medium.