Lens Detection System Using Identification Code for P-IRIS and DC-IRIS
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Solution Overview
Problem
Surveillance cameras face difficulties in accurately detecting the type of externally connected lenses, leading to potential erroneous operations or device damage due to differing circuitry designs and aperture control mechanisms among P-IRIS, DC-IRIS, and Intelligent CS-mount lenses.
Innovation Solution
A lens detection method and system utilizing a system chip with a first lens selection pin and protocol path pin to detect a lens identification code, enabling the appropriate operation mode for controlling the connected lens and disabling the selection pin if the code is undetected, thereby preventing incorrect lens type detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual setting method is used to configure lens type, then user can control the control circuit according to lens type, but it causes inconvenience in use and is difficult to ensure correctness
Solution Approach 1:
The lens detection system performs automatic lens type detection through the connector without requiring manual user configuration. The control circuit automatically detects the lens type through electrical connections and identification codes, eliminating the need for users to manually set lens parameters while ensuring accurate detection and proper control.
2Ease of operation
If automatic lens detection is implemented, then convenience and correctness are improved, but additional detection circuits and protocols are required
Solution Approach 1:
The connector is designed with multi-functionality, serving both as a physical connection interface and as a detection pathway. The same connector pins are used for both power/control signals and for transmitting lens identification codes, eliminating the need for separate dedicated detection circuits and reducing overall system complexity.
Solution Approach 2:
Lens identification codes serve as an intermediary mechanism transmitted through the existing connector electrical paths. Rather than requiring direct physical inspection or complex sensing, the system uses coded electrical signals conveyed through the connector pins to identify lens type, simplifying the detection process while maintaining accuracy.
Data Source
AI summary
A lens detection system includes a system chip, and the system chip includes a first lens selection pin and a protocol path pin. A lens detection method includes performing a reset step by the system chip; enabling the first lens selection pin by the system chip; detecting a first lens identification code via the protocol path pin by the system chip; loading first lens data by the system chip and entering a first lens operation mode for controlling an externally connected first lens if the first lens identification code is detected; and disabling the first lens selection pin by the system chip if the first lens identification code is undetected.