Spectrophotometer A/D Conversion Time Controller for Wavelength Validation

The patent applies periodic action by synchronizing the A/D conversion timing with the AC power frequency cycle. The A/D converter is controlled to perform conversions at specific phases within each power cycle, ensuring that measurements are taken at consistent points in the emission intensity waveform. This transforms the unstable periodic fluctuation into a controlled sampling strategy that eliminates measurement errors.

The patent changes the timing parameter of the A/D conversion process to match the AC power frequency. By adjusting the conversion timing to occur at specific phases (e.g., peak or zero-crossing points) of the power cycle, the system captures stable emission intensity values. This parameter adjustment transforms the measurement process to be synchronous with the light source's operational cycle.

The patent maintains continuous useful action by performing A/D conversion at every appropriate phase of the AC power cycle rather than skipping measurements. Although the sampling rate is effectively reduced compared to continuous high-rate sampling, each measurement point captures critical information about the emission intensity at that phase, maintaining measurement completeness while reducing data volume.

The patent applies partial action by selecting only the essential sampling points within each AC power cycle that provide sufficient information for wavelength correctness validation. Instead of continuously sampling at maximum rate, the system samples at specific critical phases (such as peak intensity or zero-crossing points), obtaining adequate measurement data with reduced sampling frequency and consequently smaller data size.