Laser Cooler Dew Prevention via Sensor Current Control
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Solution Overview
Problem
High-power laser devices face dew formation risks on coolers due to humidity fluctuations, which can damage the laser diode and reduce the lifespan of humidity sensors, as existing solutions either fail to extend sensor lifetime or cannot be applied to prevent dew formation effectively.
Innovation Solution
A laser device equipped with a humidity detector, temperature detector, dew point calculator, and current application controller that adjusts the current application to the humidity detector based on dew point and door open/close states to prevent dew formation, while extending the sensor's operational life by optimizing dehumidification and reducing current application time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the humidity sensor is continuously actuated to maintain detection accuracy, then the detection accuracy is maintained, but the lifetime of the humidity sensor decreases
Solution Approach 1:
The patent implements periodic actuation of the humidity sensor by controlling current application in cycles rather than continuously. The sensor is actuated at specific intervals (periodic cycles) to maintain detection accuracy while reducing cumulative stress. This periodic operation pattern extends the sensor's operational lifetime by allowing recovery periods between actuation cycles, directly resolving the contradiction between maintaining measurement precision and extending duration of action.
2Duration of action of stationary object
If the current application stop period is extended to shorten cumulative current application time, then the sensor lifetime is extended, but the detection accuracy may deteriorate
Solution Approach 1:
The patent employs feedback control by monitoring the humidity detection values and adjusting the current application timing accordingly. When the detected humidity value remains within a predetermined range, the system extends the current application stop period to reduce sensor stress. When humidity values approach critical thresholds, the system increases actuation frequency. This feedback mechanism ensures detection accuracy is maintained while optimizing sensor lifetime by dynamically adjusting the balance between actuation and rest periods.
3Measurement precision
If the humidity sensor is heated in constant cycles to recover from degraded performance, then the detection accuracy is restored, but the cumulative heating time reduces the sensor lifetime
Solution Approach 1:
The patent implements dynamic adjustment of heating cycle parameters based on actual sensor performance and environmental conditions. Rather than using fixed constant cycles, the heating duration, temperature, and frequency are dynamically modified according to the sensor's degradation state and operational needs. This dynamic approach allows recovery of detection accuracy while minimizing cumulative heating time, thereby extending sensor lifetime compared to rigid constant cycling methods.
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 solution effectively prevents dew formation on the cooler and extends the lifetime of the humidity sensor by dynamically controlling current application to the humidity detector, maintaining accurate humidity detection and reducing sensor degradation.
Implementation Method 1
a cooler responsible for the cooling has been provided in the laser device
Implementation Method 2
the humidity sensor is recovered from degraded performance by being heated in constant cycles, with a heater accompanying the humidity sensor
Implementation Method 3
a dew point calculator that calculates a dew point based on the humidity detected by the humidity detector, and the temperature detected by the temperature detector
Data Source
AI summary
To provide a laser device allowing the prevention of dew formation on a cooler of the laser device, while contributing to a longer lifetime of a humidity sensor to be used. A laser device includes a laser diode and a cooler for cooling the laser diode. The laser diode and the cooler are provided in a housing. The laser device includes: a humidity detector that detects humidity in the laser device while current is applied to the humidity detector; and a current application controller that controls the time of current application to the humidity detector. In one aspect of the laser device, the laser device further includes: a temperature detector that detects a temperature in the housing; and a dew point calculator that calculates a dew point based on the humidity detected by the humidity detector, and the temperature detected by the temperature detector. The current application controller controls the time of current application to the humidity detector based on the dew point calculated by the dew point calculator.