Servo Idle Position Testing via Internal Sensor Extraction
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Solution Overview
Problem
The existing methods for testing the idle position of servos are complex and require precise installation of sensors, leading to inaccurate results due to poor installation quality.
Innovation Solution
An apparatus and system that uses a driving mechanism and control circuit to rotate the output shaft of a testing servo, eliminating the need for external sensors by utilizing an internal sensor and a driving servo mounted on a support platform, which transmits torque through a transmission unit with symmetrical gear structures to stabilize torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an external sensor is used to measure the rotation of the output shaft, then the idle position can be tested, but the device structure becomes complex and installation quality becomes demanding
Solution Approach 1:
The patent extracts the measurement function from an external sensor and relocates it to the internal sensor already present within the servo. By utilizing the servo's built-in sensor to detect the position of the output shaft, the system eliminates the need for external sensing equipment, thereby simplifying the overall test device structure while maintaining measurement capability
Solution Approach 2:
The internal sensor of the servo is made multi-functional by using it for both the servo's normal operation control and for idle position testing. This dual-use approach eliminates the need for dedicated external testing sensors, reducing device complexity while preserving measurement precision
2Measurement precision
If an external sensor is installed on the output shaft, then idle position testing can be performed, but installation quality becomes demanding and test accuracy deteriorates
Solution Approach 1:
The measurement function is extracted from external components and relocated to the internal sensor already integrated within the servo mechanism. This eliminates the installation interface between external sensors and output shafts, removing the source of installation quality problems that compromise measurement accuracy
Solution Approach 2:
The testing system merges with the servo's existing internal sensor rather than adding separate external sensing components. By combining the testing function with the already-installed internal sensor, the system avoids additional installation steps and potential installation quality issues
3Ease of operation
If a driving mechanism with separate power source is used to rotate the output shaft, then the testing can be performed, but the device complexity increases
Solution Approach 1:
The servo itself is made multi-functional by using its own motor and control system to perform both its intended actuation function and the testing function of rotating the output shaft for idle position measurement. This self-testing capability eliminates the need for separate external driving mechanisms and power sources
Solution Approach 2:
The servo performs its own testing by utilizing its internal motor to rotate the output shaft through various angles including the idle position. The system is self-sufficient, requiring no external driving apparatus, which significantly reduces device complexity while maintaining operational ease
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 simplifies the testing process, increases accuracy by avoiding sensor installation issues, and allows for repeated use of the driving servo without the need for a separate power source, enhancing the precision and reliability of idle position testing.
Implementation Method 1
transmits torque through a transmission unit with symmetrical gear structures to stabilize torque transmission
Data Source
AI summary
The present disclosure is an apparatus for testing an idle position of a servo, including: driving mechanism, a transmission unit transmitting torque of a driving servo to a testing servo, and a control circuit electrically connecting to the driving servo and the testing servo to acquire idle position information. The apparatus drives the output shaft of the testing servo to rotate by an external driving mechanism, and measures an amount of rotation of the output shaft by an internal sensor of the testing servo. Therefore, an external sensor may not be provided, and a problem of precision installation of the external sensor can be avoided. Further, a problem caused by poorly install the external sensor and the output shaft can also be avoided, and accuracy of a testing result can be increased.