CoroCAM 6D Camera Operation Training September 2012
CoroCAM 6D Body Rubber cover on SD Card slot & USB port Lens Cap retention loop Charging port, video & audio output, audio input Laser pointer
CoroCAM 6D Body 5.7 High Brightness LCD Screen 640x480 pixels Quick Instructions Sticker GPS booster antenna plug Control Buttons Power button Battery Cover Hand Strap
CoroCAM 6D Core Function The core function of the camera is to capture UV and visible channel images. The images are fused to show the user where the discharge source is located. Because the discharge event is sporadic a sequence (video) of images are required to effectively show the discharge activity for diagnosis.
CoroCAM 6D New Features July 2012
CoroCAM 6D UV Signal A/I A/I = Averaging and Integration The corona discharge is a sporadic event, consequently it s intensity varies from frame to frame, this is clearly not ideal. Therefore the CoroCAM 6D allows the user to average the UV signal over a number of frames. The averaging evens out intensity differences in frames and reduces the effect of noise from the environment on the image. The averaging is done on a per frame basis, allowing the UV channel to be 100% live. Sequence of frames Average of the sequence above
CoroCAM 6D UV Signal A/I Under some conditions a small UV signal needs to be integrated over a number of frames to make it visible. Full integration of the sequence. The UV signals can be integrated by increasing the integration gain. Sequence of frames When an A/I period is selected, the camera performs a NonUniformity Correction (NUC) to remove system noise from the count. During the NUC, the camera gain is dropped to zero, the count measured for the A/I period, this value is then subtracted from the count achieved at the gain the user sets. The NUC period is the same as the A/I period the user set, so the NUC can take a while when the A/I period is long. The integration gain is also set to the default.
CoroCAM 6D Fault numbering Camera users usually capture multiple image of a fault. Afterwards it may be hard to see which images are related. Therefore a function was added to number the faults. The fault number value is added to the file name, making it easier to sort images when doing reporting. i.e. At the beginning of an inspection session the user would rest the fault number to 001. The images, videos and meta data of the first fault found and recorded will all have the 001 fault number prefixed to their file names. When the user moves on to the next fault he increments the fault number to 002. The CoroBASE software (when completed) will import the files from the camera and attach all images, videos and meta files with the same fault number to the same data point in the database.
CoroCAM 6D Spectrum The CoroCAM 6D is the first camera which shows the user which spectrum bands are being displayed. This avoids the user missing discharges due to the UV spectrum not being displayed. UV & Visible displayed Visible only UV only
CoroCAM 6D Labels Many users require annotation labels to be added to images. We didn t want to clutter the user interface with many keys. The solution was to allow the user to select labels from a csv-text file. There are 4 columns in the csv file, each can have up to 16 entries which the user can edit from a smart phone or tablet. There are 4 label locations, each linked to a column in the csv file. Label location can be activated individually. The user can scroll the available entries.
CoroCAM 6D Count Sampling The CoroCAM 6D has 3 sizes of sampling areas: Small Medium Full Screen
CoroCAM 6D Count Method The CoroCAM 6D features a new method to count corona discharge events and reflect the intensity of the discharge. In the past blob counting was used to count each photon event detected by the camera. This is suitable for low intensity discharges, where the chances of the photon events overlapping and forming a larger blob was minimal. When the photon events overlap the blob counting method becomes unreliable.
CoroCAM 6D Count Method However, when the blobs overlap, the intensity of the pixels under the overlapped area increases if the UV image is not saturated. Using a complicated formula, which takes into account the camera settings, we ve managed to calculate a count value which stays consistent. Changes to the gain, threshold, window size and NUC will change the count value.
CoroCAM 6D UV Opaqueness. For diagnosis of the fault it is necessary to see the visual cause of the discharge. With the corona overlay the cause of the discharge usually hidden under the corona blob. Traditionally the user would have to record 2 images, with and without the corona discharge blob By controlling how the UV and visible images are fused the CoroCAM 6D allows the corona blob to be come transparent, allowing the operator to see the visual cause of the discharge and necessitating only the capture of one image for reporting.
CoroCAM 6D UV Colours To maximise contrast between the corona blob and the background on the visible camera the user can select various colours. The colours can be either one of the 4 presets Alternately, one of 100 hues can be selected, resulting in an entire rainbow of colours.
CoroCAM 6D Recording / Playback The CoroCAM6D can record: Still images in jpeg format Videos in avi format using the H.264 encoding. A csv file containing the meta data associated with each image or video capture is also recorded.. Audio can be recorded with the video clips using the onboard microphone or a headset (best quality).. The CoroCAM6D can playback the still images or videos recorded onto the SD card. The type of file played back depends on the active camera mode setting. i.e. if the camera is in photo mode it will playback the still images. If the camera is in video mode it will playback the video clips.
CoroCAM 6D Output image We recognized that users wanted a neat interface but that they didn t necessarily want to record the interface. So we gave the user the choice of recording: the display activity, a simplified report image an image with no overlays, the data is in a meta filed saved with the image. The Display recording The Report recording The OSD off recording
CoroCAM 6D USB The CoroCAM 6D can be connected to a PC via a microusb port. When the camera is set to USB mode the user can download images and videos from the cameras. The CSV annotation file can also be edited. In the near future the remote control unit / pc software will be available to control the camera via the USB port.
CoroCAM 6D Camera Operation Training September 2012
Operating the CoroCAM 6D The CoroCAM 6D uses hot keys to access various types of user settings. Keys 1 6. Multiple presses of the hot key are used to navigate the tabs. Long-pressing the hot key give access to the setup menu s.
Operating the CoroCAM 6D The quick guide sticker on the camera. Old version shown. 1 2 3 4 5 6
CoroCAM 6D Operating Each button (1-6) may be pressed up to 3 times to access different tabs. Tab one active in the above example. Under each tab there may be up to 4 items to be selected / toggled and one variable value which can be changed using the F/B keys. Long press the S-Key to reset the selected value to its default.
CoroCAM 6D Key #1 Tab #1 Gain and Zoom control The Zoom can be set to either 0.5x, 1x or 2x of the system zoom using the L/R keys. The default is 1x. 1x Zoom = 8 x 6 Angle of View 2x = 4 x 3 ; 0.5x = 16 x 12 Gain sets the amplification of the UV signal, the value can be set from 0 to 100% amplification using the F/B keys. The default is 85%. Long pressing the #1 Key will cause the laser pointer to activate, it will de-activate when the key is released.
CoroCAM 6D Key #1 Tab #2 A/I control. The ʃ# designates the number of frames over which the averaging or integration will occur. The ʃ-gain allows the operator to set the number of frames over which to average the signal. i.e. For averaging, the signal is summed and then divided by the number of frames taken into consideration. For maximum integration the signal is summed and divided by 1. Integration is used to make small signals more visible. Averaging removes sporadic events (noise).
CoroCAM 6D Key #1 Tab # 3 Fault number. The # increments the value of fault number (shown in the middle block) The #
CoroCAM 6D Key # 2 Tab # 1 Channel control Use the L/R keys to select the channels to be displayed UV & VIS, just Visible or just UV. The F/B keys sets the transparency of the UV overlay onto the visible channel. Only in effect when the U V & VIS option is selected.
CoroCAM 6D Key # 2 Tab # 2 Labels Use the L/R keys to select the label, press select to activate. Use the F/B keys to scroll through the labels in each category.
CoroCAM 6D Key # 2 Tab # 3 Screen brightness Use the L/R keys to select Auto or Manual mode. In manual mode use the F/B keys to set the screen brightness.
CoroCAM 6D Key # 3 Tab # 1 UV Count set the sampling window size and the threshold above which pixels must be included into the count. Use the L/R keys to select the sampling window size. Medium, Small & Full screen. Set the threshold using the F/B keys. Any pixels intensities below the threshold value is not taken into consideration in the count.
CoroCAM 6D Key # 3 Tab # 2 UV Colour set the colour used to define the discharge location. Select one of the default colours using the L/R keys. Alternately, the colour hue (which optimally contrast with the background) can be set by the F/B key.
CoroCAM 6D Key # 3 Tab # 3 UV Focus set the UV focus mode. Select the UV cameras focus mode using the L/R keys. In Automatic Focus mode the UV camera will focus on the same plane as the visible camera Slaved focus. In manual mode the UV focus can be adjusted by the F/B key.
CoroCAM 6D Key # 4 Tab # 1 Visible Focus set the visible camera focus mode. Select the Visible cameras focus mode using the L/R keys. In manual mode the Visible focus can be set by the F/B key.
CoroCAM 6D Key # 4 Tab # 2 Visible Options set the enhancement modes available on the visible camera. Select the enhancement mode of the visible camera using the L/R keys. BL (Back Light) over exposes the images to render detail in dark areas more visible. LL (Low Light) sets the visible camera into integration mode, this reduces the frame rate and changes the colour to greyscale, but increases the light collection period. This is useful for working in near dark conditions or to detect large discharges using the visible channel.
CoroCAM 6D Key # 5 Tab # 1 Camera Mode set the camera recording mode to Video, Still or Off. Select the camera recording mode using the L/R keys. In Video Mode a AVI movie will be recorded approximately 1hrs/ GB For optimal recording quality the camera should be in PAL mode. In Still mode a jpg will be recorded. In Remote Viewing & Control mode the camera can be controlled via a USB cable. Available in next software update.
CoroCAM 6D Key # 5 Tab # 2 Camera Playback When entering this mode the camera will playback the last recording in the mode that the camera is in.
CoroCAM 6D Key # 6 Start & stop a recording In Video Mode a AVI movie will be recorded until the Key #6 is pressed again. In Still mode the image will be frozen and an accept / discard interface will appear. Use the L/R keys to select. If Accept is selected use the S-Key to record a jpg. Selecting discard and pressing the S-Key will result in the camera returning to the live image.
CoroCAM 6D Long Press Long pressing any of the Keys #1 through #5 will show the user setting menu. 1. Activates the laser, it will de-activate when the key is released. 2. Shows the reset to factory default area, there are 2 options: Exit to screen Reset camera to factory default a PIN will be required. 3. Shows the calibration interface, this is for factory use only and a pin is required to make changes. 4. Shows the clock interface, the USB on/off and About camera info. Select the icon with the L/R keys and S-key to enter/switch mode. When the clock is selected, the date & time will flash, use the F/B keys to change the value and the L/R keys to scroll, S-key sets the date and time values.
CoroCAM 6D Long Press 5. Shows the output setup interface. There are 4 options which can be set. Use the L/R key to select an option and the S-Key to toggle the option.. GPS on will show the GPS co-ordinates on the screen if a GPS receiver is fitted.. The On Screen Display in the off position removes all overlays from the video channel.. The overlays on the video out channel can either be the Full screen as shown to the operator useful in training. Or it can be only a block showing the info required for interpretation and reporting.. Toggle to switch between PAL and NTSC. PAL results in better quality recordings.
CoroCAM 6D Output screens The Full output screen records the device screen.
CoroCAM 6D Output screens The Report output screen.
CoroCAM 6D Output screens The OSD off output screen.
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