Vibration control system for ultrasonic cleaning of camera lens

By deploying intelligent piezoelectric sensing transducers at the edge of the camera lens's light-transmitting sheet, electrical response signals are collected to construct the sound field distribution, identify and compensate for undesirable node areas, solving the problems of uneven sound field energy distribution and cleaning blind spots in existing technologies. This enables real-time sensing and uniformity control of the light-transmitting sheet surface, reducing the risk of fatigue damage.

CN122284709AActive Publication Date: 2026-06-26CHONGQING JUNGE ELECTRONICS TECH CO LTD
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Patent Information

Application Number
CN202610730148.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-26
Publication Date
2026-06-26
Estimated Expiration
2046-05-26

AI Technical Summary

Technical Problem

In existing ultrasonic cleaning technologies for camera lenses, fixed or simple frequency sweep drives cannot adapt to changes in the acoustic characteristics of the light-transmitting film, resulting in uneven distribution of sound field energy, cleaning blind spots or excessive local vibrations, and a lack of real-time sensing capability of the vibration state of the light-transmitting film surface.

Method used

By deploying several intelligent piezoelectric transducers at the edge of the lens's light-transmitting plate, electrical response signals are collected to construct transient sound field distribution description data, identify unwanted sound field aggregation node regions, generate inverse phase compensation drive signals, and adjust sweep frequency excitation parameters to improve sound field uniformity.

Benefits of technology

It enables real-time sensing and uniformity control of the sound field distribution on the surface of the light-transmitting sheet, reducing the risk of local fatigue damage to the light-transmitting sheet and improving the cleaning effect.

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Abstract

The invention discloses a vibration control system for ultrasonic cleaning of a pick-up lens, and relates to the technical field of vibration control for ultrasonic cleaning, which comprises the following steps of: acquiring an electrical response signal, constructing transient sound field distribution description data of a lens light-transmitting sheet in a current cleaning period based on the electrical response signal, and determining the current cleaning period of the lens light-transmitting sheet based on the transient sound field distribution description data. Identifying an unexpected sound field aggregation node area, and determining a spatial position and a vibration energy concentration degree; generating an inverse phase compensation driving signal based on the identified spatial position and vibration energy concentration degree of the unexpected sound field aggregation node area, and superposing the inverse phase compensation driving signal into the driving signal; and after the cleaning period is finished, based on the cleaning uniformity, when the cleaning uniformity does not reach the expectation, the starting frequency and the frequency sweeping step length of frequency sweeping excitation in the next cleaning period are adjusted. On the premise that the overall cleaning capacity is not affected by inverse phase compensation, selective suppression is formed on a local area with too high energy, and the uniformity of a sound field is effectively improved.
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