Stationary Sensor Unit for Rotating Cymbals
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Solution Overview
Problem
Existing sensor systems for electronic cymbals rotate when the cymbal rotates, causing inconsistent signal generation due to changing sensor-striking point distances, cable damage from stress, and potential loosening of attachment screws or welding, which complicates installation and replacement.
Innovation Solution
A sensor unit comprising a sensor board with a contact area, a fixed sensor, a bearing with a through-hole, and a detachable base with a shaft, where the bearing is more flexible than the sensor board, ensuring the sensor remains stationary and the cable unwinds, even when the cymbal rotates, and allowing for easy attachment and replacement without modifying the cymbal or stand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor is attached to the cymbal or cymbal stand by a screw or weld, then the sensor can detect vibration of the cymbal, but the sensor and pick-up rotate when the cymbal rotates, causing the distance between the sensor and striking point to change
Solution Approach 1:
A bearing is introduced as an intermediary component between the sensor assembly and the cymbal stand. The bearing allows the sensor to remain stationary while the cymbal rotates, preventing the sensor from rotating with the cymbal and maintaining consistent distance to the striking point.
Solution Approach 2:
The sensor system is divided into separate functional components: the sensor mounted on a sensor board, the bearing for rotational support, and the attachment mechanism to the stand. This segmentation allows each component to perform its specific function independently, with the bearing handling rotation isolation.
2Strength
If the sensor is attached to the cymbal by a screw, then the sensor can be securely mounted, but the screw can loosen due to the vibration of the cymbal
Solution Approach 1:
The bearing is pre-installed in the sensor board to provide rotational support before the cymbal is attached. This beforehand preparation ensures that the attachment screws are not subjected to rotational stresses during cymbal rotation, preventing loosening.
3Strength
If welding is used to secure the sensor attachment, then the sensor can be firmly fixed, but additional work must be done to the cymbal and the sensor cannot be replaced or moved
Solution Approach 1:
The sensor system is designed as a modular assembly with the sensor mounted on a sensor board that attaches to the stand via a bearing. This segmentation allows the sensor to be easily removed and replaced without welding, while still achieving firm fixation through the bearing mechanism.
Solution Approach 2:
The bearing serves as an intermediary that provides both rotational support and a secure mounting interface. This intermediary component enables firm attachment through mechanical means rather than welding, allowing for easy replacement and repositioning.
4Reliability
If the sensor or plate to which the sensor is attached rotates when the cymbal rotates, then the cable connected to the sensor rotates and may wind around other components, but the sensor must be attached to the cymbal to detect vibration
Solution Approach 1:
The bearing acts as an intermediary that decouples the rotational motion of the cymbal from the sensor and cable assembly. This allows the sensor to remain stationary relative to the stand while still detecting vibrations from the rotating cymbal, preventing cable rotation and winding.
5Ease of manufacture
If a hole is formed to the cymbal to attach the sensor, then the sensor can be mounted, but the cymbal structure is modified
Solution Approach 1:
The sensor is mounted on a separate sensor board that attaches to the cymbal stand, not directly to the cymbal. The bearing serves as an intermediary mounting point, eliminating the need to form holes in the cymbal and preserving its structural integrity.
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
The sensor unit maintains consistent signal generation and prevents cable damage by keeping the sensor stationary relative to the striking point, ensuring reliable sound production and easy installation without damaging the cymbal or stand.
Implementation Method 1
a bearing (5) is fixed to the sensor board (4)... the bearing (5) is made of a material that is more flexible than the sensor board (4)
Data Source
AI summary
A sensor unit, which is used for detecting a vibration of an object that is supported by a stand, comprises: a sensor board having a contact area that is configured to contact a lower surface of the object; a sensor that is configured to detect a vibration of the object and is fixed to the sensor board; a bearing that is fixed to the sensor board and has a through-hole; and a base that has a shaft that is inserted in the through-hole of the bearing. An outer configuration of the through-hole of the bearing is structured to substantially correspond to an outer configuration of the shaft of the base.