Mechanical Scanning 3D Ultrasonic Transducer Origin Detection
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Solution Overview
Problem
Conventional mechanical scanning 3D ultrasonic transducers face inaccuracies in origin position detection and movement direction determination when increasing the swing range, leading to incomplete or inaccurate three-dimensional imaging due to the conventional origin detection method and the resulting need for larger gear sizes which hinder downsizing and weight reduction.
Innovation Solution
A mechanical scanning 3D ultrasonic transducer design that includes a housing with a driving device and a detecting device, where the detecting device decelerates the rotation of an intermediate member to ensure the total rotation speed of the detecting member is one rotation or less, using a combination of gears and timing belts to accurately detect the origin position and reduce gear size, while allowing for adjustable shaft distances and elastic urging to minimize backlash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the swing range of the ultrasound transmitting/receiving unit is increased to widen the visual field, then the detection accuracy of the origin position deteriorates due to multiple rotations of the optical rotating plate
Solution Approach 1:
The patent changes the gear ratio parameter of the reduction mechanism to control the rotation speed of the optical rotating plate. By adjusting the gear ratio between the drive shaft and the optical rotating plate, the system ensures that the optical rotating plate rotates less than one full rotation during the maximum swing range, thereby maintaining accurate origin position detection while allowing extended swing range operation.
2Adaptability or versatility
If the gear size is increased to accommodate larger swing range, then the device size and weight increase, hindering downsizing
Solution Approach 1:
The patent optimizes the gear ratio parameter to achieve the desired swing range with smaller gear sizes. By carefully selecting the gear ratio between the drive shaft and the optical rotating plate, the system achieves extended swing range capability without requiring proportionally large gears, thus maintaining compact device size and reduced weight.
3Measurement precision
If the gear size is increased to ensure accurate detection over full stroke, then the device complexity and size increase
Solution Approach 1:
The patent simplifies the gear mechanism by optimizing the gear ratio parameter. By ensuring that the optical rotating plate rotates less than one full rotation during maximum swing, the system eliminates the need for complex multi-stage reduction mechanisms or additional detection systems, thereby maintaining detection accuracy with simpler device architecture.
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 accurate origin position detection and formation of more accurate three-dimensional images without increasing the size of the ultrasonic transducer, facilitating downsizing and weight reduction while maintaining precise movement direction control.
Implementation Method 1
An ultrasound transmitting/receiving unit 34 constituted of a piezoelectric element group is disposed on a top surface portion of the holding plates 33
Implementation Method 2
The mechanical scanning 3D ultrasonic transducer uses a transmission type photosensor to detect a rotation position of the ultrasound transmitting/receiving unit
Data Source
AI summary
An ultrasonic transducer includes a housing, a driving device, and a detecting device. The housing internally includes an ultrasound transmitting/receiving unit, the housing sealing ultrasonic propagation liquid. The driving device includes a driving motor and an intermediate member. The driving device is configured to transmit a rotary driving force from the driving motor to swing the ultrasound transmitting/receiving unit. The detecting device includes a detecting member and is configured to detect an origin position serving as a reference in control of the swing of the ultrasound transmitting/receiving unit. The driving device is configured to transmit the rotary driving force to the intermediate member, extract a rotation of the intermediate member, decelerate the rotation of the intermediate member and transmit the rotation to the detecting member thereof in a route different from the driving device, and detect the rotation of the detecting member by a sensor to detect an origin position.