SLAAEP3 December   2025 ULC1001

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Acronyms
  5. 2 Introduction
  6. 3 Impedance Response
    1. 3.1 Piezo Only
    2. 3.2 Lens Cover
    3. 3.3 Lens Cover System (LCS)
  7. 4 Equivalent Circuit Model of LCS
  8. 5 LC Filter for LCS
  9. 6 Water Cleaning
  10. 7 Power Consumption
  11. 8 Reliability
  12. 9 Other Tests
    1. 9.1 De-ice
    2. 9.2 Mud Cleaning
    3. 9.3 Optical Interference
    4. 9.4 Waterproof Capability
  13. 10Resources

3.3 Lens Cover System (LCS)

Once the lens cover is properly positioned within the housing, this constitutes the final lens control system (LCS). The housing contributes additional damping, which can result in an increase in the impedance of the lens cover. Make sure to regulate the induced damping from the housing to the smallest extent possible.


Flat Lens LCS (LCS): Lens Cover + Cap + Seal + Base
Figure 3-5 Flat Lens LCS (LCS): Lens Cover + Cap + Seal + Base

Figure 3-6 shows the impedance response of the LCS. Compared to the Lens Cover, the resonant frequency of the 65.8kHz changes to 66.2kHz, which is relatively minimal. The impedance increases significantly from 226.7Ω to 337.6Ω.

Impedance Response of LCSFigure 3-6 Impedance Response of LCS