Wideband Data Acquisition
There are a number of applications where wideband data acquisition is used such as structural vibration monitoring, pyrotechnic separation tests, flight dynamic data and wideband acoustic test. The adoption of next generation data transmission protocols (e.g. Ethernet) and storage technologies (e.g. solid-state) make wideband analog a viable option for recording unprocessed data for later analysis. ACRA CONTROL achieves wideband data acquisition solutions with a bandwidth up to 25 KHz with high accuracy and resolution using several techniques including an all-digital design.
The signals are first over sampled before DC offsets, gains and filtering digitally to avoid the pitfalls of multiplexing and other sources of noise. The use of fixed analog anti-aliasing filters with a cutoff frequency set above bandwidth available means minimized influence of components variations into the user’s bandwidth. ACRA CONTROL introduced this technology to its KAM-500 and SSR-500 range last year with the KAD/ADC/126 – a four channel S/E accelerometer (ICP) analog to digital converter. This capability has already been used in flight test, mission recording and unit test applications. ACRA CONTROL’s wideband range has now been expanded with the introduction of the KAD/ADC/129.