Radiation Imaging Notification Sound Frequency Control
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Solution Overview
Problem
X-ray imaging apparatuses face electromagnetic interference issues due to sound-production components like loudspeakers, which can cause image noise and operation errors by generating stronger electromagnetic fields, interfering with sensitive detection mechanisms.
Innovation Solution
A radiation imaging apparatus with a notification unit that produces sound with a fundamental frequency based on the readout frequency of the sensor unit, and optionally includes a bandpass filter to reduce noise, ensuring the sound frequency does not exceed half of the sampling frequency of the detecting unit, thereby minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sound-production component such as a loudspeaker is mounted to provide notification function, then the user can recognize apparatus state information through sound, but electromagnetic interference is generated that causes image noise and operation errors
Solution Approach 1:
The patent applies parameter changes by carefully selecting and controlling the operating parameters of the sound production component. Specifically, the notification sound frequency is set to a range that minimizes electromagnetic interference with the detection mechanism, and the sound output level is controlled to reduce electromagnetic radiation while maintaining audible notification effectiveness.
Solution Approach 2:
The patent introduces an intermediary approach by using a notification sound with specifically controlled characteristics as a mediator between the user and the apparatus state. The sound is designed to provide notification functionality while its parameters are tuned to act as a non-interfering intermediary that does not disrupt the sensitive detection operations.
2Ease of operation
If the sound production component is driven at higher frequency or intensity for better notification, then notification effectiveness is improved, but electromagnetic interference intensity increases causing more severe image noise
Solution Approach 1:
The patent optimizes the frequency and intensity parameters of the notification sound to achieve an effective balance. The sound frequency is selected within a specific range that provides adequate notification effectiveness while minimizing electromagnetic radiation intensity that would interfere with image detection.
Solution Approach 2:
The patent converts the potentially harmful electromagnetic radiation from the sound production component into a beneficial or neutral effect by carefully selecting operating parameters. The electromagnetic radiation is controlled to fall within levels that do not interfere with detection mechanisms, effectively transforming a potential harm into an acceptable operational characteristic.
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 approach effectively reduces the influence of sound production on image quality and operation, preventing electromagnetic noise from affecting the detection mechanism and ensuring accurate imaging.
Implementation Method 1
The sound-production component such as a loudspeaker generates electromagnetism during a sound-production period
Data Source
AI summary
A radiation imaging apparatus includes a sensor unit in which a plurality of detecting elements each configured to detect emitted radiation are arranged, and a notification unit configured to make a notification by a sound. As the sound produced from the notification unit, a sound having a fundamental frequency which satisfies a condition determined based on the number of rows of a predetermined area of an image read out from the sensor unit and a readout frequency of signals of each row is used.