Shutter Drive Motor Stop Timing Control
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Solution Overview
Problem
Existing shutter drive devices face challenges in increasing frame speed during continuous shooting, particularly due to limitations in controlling the motor stop timing and temperature variations affecting gear friction and drive load.
Innovation Solution
A shutter drive device incorporating a temperature sensor and position sensor to control the motor stop timing based on detected temperature and rack member position, utilizing a charging member with gears and a motor to optimize shutter mechanism operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor stop timing is controlled based on temperature and position, then the frame speed during continuous shooting is improved, but the device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The control part pre-calculates and stores optimal stop timing data for various temperature conditions and rack member positions. During operation, the system simply retrieves pre-computed timing information based on sensor inputs, avoiding complex real-time calculations and reducing processing delays that would limit frame speed.
Solution Approach 2:
The system continuously monitors temperature via the temperature sensor and rack member position via the position sensor, then adjusts motor stop timing based on this feedback. This closed-loop control ensures optimal timing adaptation to varying operating conditions, maximizing frame speed while maintaining reliability.
2Reliability
If the motor stop timing is adjusted for temperature compensation, then the reliability is improved, but the control complexity increases
Solution Approach 1:
The control part automatically adjusts motor stop timing based on temperature sensor feedback without requiring manual intervention or complex external control systems. The system self-regulates to compensate for temperature-induced friction variations, maintaining reliable operation while keeping the control mechanism integrated and relatively simple.
Solution Approach 2:
The system changes the motor stop timing parameter dynamically based on temperature conditions. By adjusting this single critical parameter in response to temperature sensor data, the system achieves reliable operation across varying temperatures without implementing complex control algorithms or multiple adjustment parameters.
Data Source
AI summary
An object of the present disclosure is to increase a frame speed at the time of performing continuous shooting in a shutter drive device by controlling a charge member by using a position sensor and a temperature sensor. The shutter drive device of the present disclosure includes: a shutter mechanism; a charging member that drives the shutter mechanism by using a plurality of gears, a rack member, and a motor; the temperature sensor mounted on the charging member; a position sensor that is mounted on the charging member, and detects the rack member moved to a predetermined position; and a control part that controls stop timing of the motor based on a position of the rack member detected by the position sensor and a temperature detected by the temperature sensor.