ADLINK NEON-2000-Ono Intelligent Camera Deployment and Trigger Optimization

Single line power supply: Use a Type-C adapter (20V) that supports PD protocol to complete power supply, video output, and USB communication simultaneously, simplifying wiring (see Figure 3-6). However, it should be noted that Type-C can no longer supply power to the Hub in this mode.

Recommended connection method: Use ADLINK USB Type-C cable (30-01284-0030-A0, with screw lock) to connect to a DP supported monitor, and also connect the USB keyboard and mouse. If more USB interfaces are needed, ADLINK certified Type-C Hub (92-99090-1010) can be used, but the camera needs to be independently powered by a DC Jack at this time, as the Hub will consume the Type-C's 3W power supply capacity.

Important restriction: The I/O configuration of NEON-2000-Ono is incompatible with NVIDIA's official Jetson image, and it is strictly prohibited to use the official image to upgrade or flash the system. If you need to replace the OS or update, you must contact ADLINK to obtain exclusive firmware.

First login and software environment

The default account/password is adlink. The system comes pre installed with Ubuntu+Jetpack SDK, camera driver (Basler Pylon or V4L2), and sample code. The Samples folder on the desktop contains image acquisition and inference testing scripts. The latest example code can be accessed from the GitHub repository https://github.com/AIoT-IST/Samples obtain.

For V4L2 models (201A/202A), you can use v4l2-ctl -- list devices to view device nodes (usually/dev/video0). Preview images using Gstreamer pipeline:

bash

gst-launch-1.0 v4l2src io-mode=4 device=/dev/video0 do-timestamp=true !  'video/x-raw,width=1920,height=1080,framerate=60/1,format=UYVY' !  xvimagesink sync=false

Trigger control and synchronization optimization (core function)

For the 202B/203B models that require hardware synchronization, external sensor signals can be connected through D-sub Pin 11 to achieve hard triggering. The triggering mode is set through v4l2-ctl, and the main control parameters are as follows:

Control item description value range (default)

Trigger_mode trigger mode 0=OFF, 1=PULSED, 2=AUTOMATIC SOFT, 3=AUTOMATIC External

The gain in trigger_gain trigger mode is 10000~1280000 (step size 1000), with a default of 10000

Triggerw_bb_mode White Balance Mode 0=Manual Gain, 1=Manual Color Temp, 2=Sunny, 3=Shadow, 4=Indoor, 5=Lamp (default 1)

Low_1atency_mode Low latency mode (reduces exposure delay when enabled) 0/1

Trigger_dart_stop software triggers start stop write 1, write 1 stops again (automatic mode)

Example of actual triggering process

Scenario: Using an external photoelectric sensor to trigger the camera to capture workpieces on the conveyor belt.

Hardware wiring: The sensor output (NPN type) is connected to D-sub Pin 11 (DI0/Trigger In), and the signal ground is connected to Pin 2 or Pin 10 (DI/O GND). Please note that the sensor voltage should be within the range of 0-5V. If the sensor has a 24V output, a series resistor voltage divider or optocoupler isolation should be used.

Software configuration:

bash

# 1. Start Gstreamer preview (running in the background)

gst-launch-1.0 v4l2src io-mode=4 device=/dev/video0 do-timestamp=true !  'video/x-raw,width=1600,height=1200,framerate=60/1,format=UYVY' !  xvimagesink sync=false &

# 2. Set the trigger mode to pulse external trigger (trigger_made=1, with low latency enabled)

v4l2-ctl --set-ctrl=trigger_mode=1

v4l2-ctl --set-ctrl=low_latency_mode=1

# 3. If software triggered testing is required (without external signals), perform:

v4l2-ctl --set-ctrl=trigger_start_stop=1

#Every time this command is executed, the camera captures one frame

The automatic software triggering mode (trigger_made=2) is used for continuous triggering: the first trigger_dart_stop=1 starts continuous acquisition, and the second trigger_dart_stop=1 stops.

Important Note:

Hardware triggering is only available for 202B/203B models (201A/202A does not support external triggering).

The triggering pulse width should be greater than the minimum triggering time of the sensor (refer to the sensor manual), usually recommended to be ≥ 10 μ s.

If using strobe output (Pin 3), it can be set as a Strobe signal synchronized with the trigger to light up the LED light source. The delay parameter needs to be adjusted in the driver layer (please refer to the NEON LFR library for specific API).

Digital I/O application wiring

Digital input (sensor signal):

The sensor output is connected to the DI pin, and the COM terminal is connected to GND. Internally integrated pull-up resistor? The manual is not clear, it is recommended to connect an external 10k Ω and pull it up to 3.3V (if the sensor has an open drain output).

The input frequency can reach 10kHz, suitable for encoders or high-speed switch signals.

Digital output (driving small indicator lights or solid-state relays):

DO is an open collector electrode output, which requires an external pull-up resistor to be connected to the load power supply (3.3~30V), with a maximum current of 100mA. Typical connection method: DO is connected to the negative terminal of the load, the positive terminal of the load is connected to VCC, and the power supply ground is connected to the camera GND. Be careful not to overload, otherwise the chip may be damaged.