Dental Handpiece Maintenance Checking via No-Load Current Measurement
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Solution Overview
Problem
Existing dental handpiece maintenance systems cannot determine if a handpiece is properly maintained before operation, leading to potential abnormal heat generation due to dust, contaminants, or lubricant shortages.
Innovation Solution
A method and system that measure no-load current values of a drive motor with both well-maintained and poorly maintained handpieces to determine usability, using thresholds to classify handpieces as usable, requiring maintenance, or unusable, and adjust drive motor operation to prevent heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dental handpiece is used without proper maintenance checking, then the handpiece may be operated continuously, but abnormal heat generation occurs due to dust, contaminants, or lubricant shortage
Solution Approach 1:
The system performs preliminary maintenance checking by measuring no-load current values before the handpiece is put into continuous operation. This preliminary detection identifies handpieces with dust, contaminants, or lubricant shortages before they cause abnormal heat generation during use.
Solution Approach 2:
The system establishes a feedback mechanism where no-load current measurements are continuously monitored and compared against reference values. When deviations indicate maintenance issues, the system provides feedback to prevent operation or alert users, thereby avoiding heat generation problems during continuous use.
2Reliability
If no-load current measurement is performed to determine maintenance status, then handpiece condition can be determined before use, but additional measurement and control steps are required
Solution Approach 1:
The handpiece maintenance checking system performs self-diagnosis by automatically measuring its own no-load current values and comparing them against stored reference data. This self-service capability determines maintenance status without requiring external inspection equipment or complex manual testing procedures.
Solution Approach 2:
The system replaces complex mechanical inspection methods with electrical current measurement. Instead of manually disassembling and inspecting gears and bearings, the system uses electrical measurements of no-load current to detect maintenance issues, thereby reducing device complexity while improving reliability.
3Object-affected harmful factors
If drive motor operation is controlled based on maintenance status, then abnormal heat generation is prevented, but operation flexibility is reduced
Solution Approach 1:
The system dynamically adjusts motor operation based on real-time maintenance status assessment. When no-load current measurements indicate proper maintenance, the handpiece can operate with full flexibility. When maintenance issues are detected, the system dynamically restricts operation to prevent heat generation, thereby adapting operational flexibility to the actual condition of the handpiece.
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
Effectively determines the maintenance status of a dental handpiece before use, preventing abnormal heat generation by limiting drive time and controlling motor operation based on measured no-load current values, ensuring safe and efficient operation.
Implementation Method 1
a dental handpiece, such as a motor-driven, straight or contra-angle handpiece
Implementation Method 2
a train of gears to a dental tool, such as a cutting bur, at the tip of the handpiece for cutting teeth. There are a variety of trains of gears, such as for multiplying the rotation speed up to five times
Implementation Method 3
measuring in advance no-load current values of a drive motor
Implementation Method 4
determining whether the handpiece checked is usable, requires maintenance, or is unusable, by comparing the measured no-load current value with said reference data
Data Source
AI summary
A method for maintenance checking of a dental handpiece is disclosed. The method comprises measuring in advance no-load current values of a drive motor, with a handpiece known as being in usable condition and a handpiece known as insufficiently maintained respectively connected thereto and operated in no-load condition, storing as reference data the no-load current values of the drive motor together with associated data relating to degree of maintenance, measuring a no-load current value of the drive motor with a dental handpiece to be checked connected thereto and operated in no-load condition, and determining whether the handpiece checked is usable, requires maintenance, or is unusable, by comparing the measured no-load current value with the reference data.