Head-Separated Camera Signal Correction for Cable Length
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In head-separated camera systems, longer cables lead to waveform disturbance and signal attenuation, affecting the transmission of video signals from the camera head to the control unit, which existing technologies have not adequately addressed.
Innovation Solution
The system includes a determining module to assess the waveform of the video signal and apply enhancement, amplitude, and gain corrections based on the length of the data signal cable, using a data table to set correction conditions for the transmitter and equalizer to ensure optimal signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the cable length is increased to allow remote operation, then the operating range is improved, but the signal attenuation and waveform disturbance increase
Solution Approach 1:
The patent applies preliminary action by measuring the cable length before signal transmission begins and pre-calculating the appropriate gain values. The CCU determines the cable length based on the connection status of cable length detection resistors, calculates the required gain compensation in advance, and configures the variable gain amplifier accordingly before actual video signal transmission starts. This prevents signal attenuation issues rather than correcting them after they occur.
Solution Approach 2:
The patent changes the electrical parameter (gain) of the variable gain amplifier based on the cable length. Different cable lengths correspond to different gain values that are pre-stored in a table. When the cable length is determined, the system selects the appropriate gain value from the table and applies it to the video signal to compensate for the specific attenuation caused by that cable length, thus maintaining signal quality across different transmission distances.
2Length of stationary object
If the cable length is increased to extend operating range, then the transmission distance is improved, but the waveform disturbance increases
Solution Approach 1:
The system performs preliminary detection of cable length and pre-configures the optimal gain setting before video signal transmission begins. By detecting the cable length through resistance measurement and pre-calculating the required gain compensation, the system prepares the signal processing parameters in advance to counteract the waveform distortion that will occur during transmission, rather than attempting to correct distorted signals after transmission.
Solution Approach 2:
The patent implements a feedback mechanism where the CCU determines the actual cable length based on the resistance value detected from the cable, compares it with stored reference values, and automatically selects the appropriate gain setting from a pre-stored table. This closed-loop feedback system ensures that the gain is always optimally adjusted according to the actual cable length, thereby compensating for waveform distortion caused by varying cable lengths.
Data Source
AI summary
According to one embodiment, a head-separated device has an imaging unit, a control unit configured to control the imaging unit and a connection unit configured to connect the imaging unit with the control unit, wherein the imaging unit comprises sensor configured to capture an image, and a transmitter configured to transmit a video signal, a sync signal (HD, VD) and a clock signal to restore or to reproduce the image captured by the sensor, and the control unit comprises a determining module configured to determine whether a waveform of the video signal has a level that the video processor is processable, and a setting module configured to set the transmitter to perform enhancement correction to the video signal, if the determining module determines that the waveform of the video signal does not have the level that the video processor is processable.