DATA ACQUISITION SYSTEMS
TDAS G5
TDAS G5 DAS module is a completely independent data acquisition system that can be used stand-alone or linked together to create large test set-ups. Also, DTS has added High Bandwidth options for applications requiring data bandwidths up to 40 KHz.
Overview - TDAS G5
- Designed and manufactured to withstand in-dummy and on-vehicle dynamic testing environments
- 32 programmable sensor input channels, each with an independent excitation source, true differential instrumentation amplifier, anti-alias filter, 16-bit analog-to-digital converter, and electronic identification (EID) support
- 1 to 100 KHz sampling rate - adjustable
- Primary memory: 70 seconds at 10K samples/sec (RAM)
- Back-up memory: 7 seconds at 10K samples/sec (non-volatile flash)
- Voltage insertion and shunt emulation
- 32 multi-purpose digital input channels
- Ethernet 10/100BaseT/Tx communications
- Simple 216-position interface connector
- LED indicators for communication, calibration, power, arm status and event status
- Back-up battery input for safe operation even with loss of primary power
Communication Method
TDAS G5 supports the industry-standard Ethernet 10/100 Base T/Tx communication method.
Input Range
The nominal sensor input range is +/- 2.0 volts (differential) at a gain of 1. The maximum common-mode voltage range is 0.5 to 4.5 volts.
Excitation Sources
All excitation sources are individually regulated and limited to ensure reliable operation even with shorted cables. The standard excitation voltage is 5.0 volts.
Shunt Emulation
The TDAS G5 DAS uses shunt emulation to perform shunt checks. Shunt emulation eliminates the need for conventional shunt resistors and is enabled when "Emulation" is chosen in the SIF as the shunt calibration method. This method applies a precise current to a connected sensor and checks for expected deflection based on sensor impedance. Shunt checks are performed under software control.
Hardware Filters
Each TDAS G5 DAS measurement channel has a fixed four-pole Butterworth anti-aliasing filter with a standard -3 dB knee point at 4000 Hz. Each channel also has a software-controlled, variable five-pole Butterworth filter, which is adjustable from 50 to 5000 Hz. These two filters may be used together to provide an effective Butterworth response with up to nine poles. The TDAS Control software automatically chooses the best filter setting for a chosen sampling rate.
EID Support
Each TDAS G5 DAS measurement channel supports communication with silicon serial number devices manufactured by Dallas Semiconductor/Maxim Integrated Products. When you connect an ID chip to the proper pins on the sensor connector, the TDAS Control software can automatically read these devices and correlate the serial number with channel set-up information stored in a Sensor Information File (SIF).
Memory Size
Each TDAS G5 DAS contains 50 MB of volatile RAM and 5 MB of non-volatile flash memory. For each sensor channel, the maximum samples available via RAM is 10K samples/second for 70 seconds; for flash memory, the maximum samples available is 10K samples/second for 7 seconds.
Shock Rating
TDAS G5 DAS units are designed to function routinely in a 500 g environment such as that experienced in severe in-dummy applications. All vehicle-/sled-mounted systems are rated for and fully tested to 100 g's, 12 mS duration, in all axes. TDAS G5 equipment can be mounted directly on a vehicle, sled or other dynamic testing device.
Temperature Rating
The TDAS G5 DAS uses extensive power management to minimize heat generation.
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