On-board data acquisition systems KiDAU Classic, for crash testing applications / K3881C

A KiDAU Classic system has 32 analog and 16 digital inputs. The application of different connectors as well as pin assignments for the 32 analog inputs will be mapped by means of different SD panels. Each analog channel comprises a programmable input amplifier, bridge excitation circuit, low pass filter and 16-bit A/D converter. The amplifier precision is typically better than 0.1% and the input impedance above 10 MΩ. The gain values can be programmed from 0.5 to 10000. An internal reference voltage is used for precise control of the amplifier setting, which is achieved via software loop. The bridge excitation voltage is programmable separately for each channel. Bridge completion for half bridges can be switched internally. A short circuit limitation is provided. In contrast to former designs, the input low pass filter is designed only as an adaptive anti-aliasing filter. All necessary filtering according to SAE filter classes has to be done in the evaluation and analysis software or the CrashDesigner. Each channel of the KiDAU has a dedicated separate converter with a 16-bit resolution. Thus all channels are sampled simultaneously, ensuring that no time lack occurs between different channels. The maximum sampling rate is 100 kHz. Each channel of the KiDAU has a dedicated D/A converter of its own for compensation of the offset voltage. Neither potentiometers nor trimmers nor mechanical switches are used inside the device. All adjustments are implemented by software, automatically or by command.