DTS SLICE6 DAS Manuel utilisateur

SLICE6 DAS

User’s Manual

June 2018

SLICE6 DAS User’s Manual June 2018

support.dtsweb.com ii 13006-90010-MAN (Rev. 0)

TableofContents

DTS Support ....................................................................................................................... 4

Introducing the SLICE6 DAS............................................................................................. 5

Sensor Interface................................................................................................................. 5

Supported Sensor Types ................................................................................................. 6

Input Range ..................................................................................................................... 6

Excitation Sources........................................................................................................... 6

Bridge Completion ........................................................................................................... 7

Hardware Filters............................................................................................................... 7

Offset Compensation....................................................................................................... 7

Electronic Identification (EID)........................................................................................... 7

Shunt Emulation............................................................................................................... 7

Communication Bus .......................................................................................................... 7

Communication Method................................................................................................... 7

LED...................................................................................................................................... 8

Data Memory Size............................................................................................................... 9

Sampling Rates................................................................................................................ 9

Circular Buffer Limitations............................................................................................ 9

Basic Care and Handling................................................................................................. 10

Shock Rating.................................................................................................................. 10

Mounting Considerations........................................................................................... 10

Thermal Considerations................................................................................................. 10

SLICE6 DAS Maintenance............................................................................................. 11

Power Management.......................................................................................................... 11

Power-up and Power-down Procedures ........................................................................ 11

Software............................................................................................................................ 12

Data Collection Concepts............................................................................................... 12

Data Collection Modes................................................................................................... 12

Circular Buffer Mode.................................................................................................. 12

Recorder Mode.......................................................................................................... 12

Hybrid Recorder Mode............................................................................................... 13

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Continuous Recorder Mode....................................................................................... 13

Start Record and Event Initiation ................................................................................... 13

Appendix A: Hardware Specifications........................................................................... 15

Connector Information and Pin Assignments................................................................. 15

Mechanical Specifications.............................................................................................. 17

Accessories/Support Equipment.................................................................................... 18

Appendix B: Sensor Interface Wiring Diagrams........................................................... 19

Appendix C: Declaration of CE Conformity .................................................................. 20

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DTS Support

SLICE systems are designed to be reliable and simple to operate. Should you need

assistance, DTS has support engineers worldwide with extensive product knowledge and

crash test experience to help via telephone, e-mail or on-site visits.

The best way to contact a DTS support engineer is to submit a request through the DTS Help

Center web portal (support.dtsweb.com). You must be registered

(support.dtsweb.com/registration) to submit a request (https://support.dtsweb.com/hc/en-

us/requests/new). Registration also enables access to additional self-help resources and

non-public support information.

This manual supports the following products:

13006-90010: SLICE6 DAS Module, 2500 Hz filter

13006-90020: SLICE6 DAS Module, 3000 Hz filter

13006-90030: SLICE6 DAS Module, 20 kHz filter

13006-90040: SLICE6 DAS Module, 1500 Hz filter

13006-90050: SLICE6 DAS Module, 10 kHz filter

13006-90100: SLICE6 DAS Module, 500 Hz filter

13006-90120: SLICE6 DAS Module, 1000 Hz filter

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Introducing the SLICE6 DAS

The SLICE6 DAS is an ultra-small, low-power, high-shock-rated, data acquisition system

ideal for in-dummy and test applications with tight space constraints. Each unit contains a

system microprocessor, flash memory for data storage, PTPv2 Ethernet communications

support, and 6 analog sensor input channels supporting conventional bridge (piezo-resistive

and voltage) sensors, each with isolated excitation, high impedance differential input

amplifier, and automatic sensor identification circuits. Units can be interconnected (daisy-

chained) via the communication bus connector.

•Sample rates up to 400,000 sps on 6 channels simultaneously.

•Shock rated to 2000 g for dynamic testing environments.

•6-channel analog sensor interface supports accelerometers, load cells, pressure

sensors, strain gage and piezo-resistive bridges, and voltage inputs.

•Thermocouples, 1/4 bridges and other sensor types are supported with adapters as

needed.

•LED indicator for system status.

•Ethernet PTPv2 communications (IEEE1588) and sensor ID easily support test set-

ups daisy-chaining hundreds of channels.

Connector information, pin assignments and mechanical specifications can be found in

Appendix A. Common sensor wiring schematics are shown in Appendix B. Please see your

packing list for your hardware’s specifications.

Sensor Interface

The SLICE6 DAS supports 6 sensor measurement channels and is available with a single

connector that supports all sensor signals. See Appendix A for sensor connector pin

assignments.

Sensor interface

connector

Communication bus

Sensor alignment

guide pins

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SLICE6 DAS Sensor Interface

Supported Sensor Types

Supplying 5 V excitation up to 20 mA per channel, the SLICE6 DAS supports many types of

sensors including accelerometers, load cells and pressure sensors. The following general

sensor types are supported:

•Full- (4-wire) or half-bridge (2- or 3-wire) resistive and piezo-resistive types.

•Voltage input range: 0.1 to 4.9 V; larger ranges supported with range expander cable.

•Conditioned sensors with 5 V excitation and 2.5 V centered signal output.

For additional questions regarding supported sensors, please contact DTS and provide the

sensor manufacturer and model number, if available. For specific implementation

schematics, see Appendix B.

Input Range

The nominal sensor input range is -2.4 V to +2.5 V (2.5 V center with respect to -Ex) at a

gain of 1. At higher gains, the maximum range decreases correspondingly. For example, at

a gain of 10, the input range is ±240 mV. (The software will automatically calculate the gain

based on the user-specified input range and other sensor parameters.)

Excitation Sources

The excitation source for each sensor measurement channel is individually regulated.

Excitation sources are not turned on until the software initializes the system during

diagnostics. The excitation is fixed at 5.0 V.

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Bridge Completion

Half-bridge emulation for any channel may be selected via software. Half-bridge transducers

should be connected to ±Ex and -Sig.

Hardware Filters

Each measurement channel has a fixed frequency, 4-pole Butterworth anti-aliasing filter.

There are a variety of hardware filters available, including 500 Hz, 1000 Hz, 1500 Hz,

2500 Hz, 3000 Hz, 10 kHz and 20 kHz. Should you have any questions regarding the best

filter option for your application, please contact DTS.

Offset Compensation

Each channel can compensate for a sensor offset of up to 100% of the full-range output of a

sensor. The sensor offset is measured and the hardware compensation is adjusted during

the diagnostic check. Please see the software manual for additional information.

Electronic Identification (EID)

Each measurement channel supports communication with silicon serial number devices

manufactured by Dallas Semiconductor/Maxim Integrated Products (model DS2401). When

an ID chip is connected to the proper pins on the sensor connector, the software can

automatically read these devices and correlate the serial number to channel set-up

information stored in the sensor database.

Shunt Emulation

The SLICE6 DAS contains a shunt emulation circuit, effectively eliminating the need for

conventional shunt resistors to perform shunt checks. When “Emulation” is chosen as the

shunt calibration method, the software injects a precisely-calculated current into the sensor

to create an expected deflection of the sensor's output. Expected versus actual deflection

are compared to validate that the channel is working properly. Please see the software

manual for additional information.

Communication Bus

All communications, control signals and input power are provided

via the 21-socket, Nano-D communication bus connector. It is also

used to interconnect (daisy-chain) multiple units for hundreds of

test channels. See Appendix A for pin assignments.

Communication Method

The SLICE6 DAS supports Ethernet PTPv2 communications (IEEE1588). PTP (Precision

Timing Protocol) provides standards for precision clock synchronization for measurement

and control systems via Ethernet network communications. Timing information is extracted

from the network’s master clock and used by the SLICE6 DAS to adjust their internal (local)

clock, providing precision timing for high channel-count systems with a sampling

synchronization better than 10 µs. Communication is enabled after the initialization

sequence has completed (15-30 seconds after sufficient power is applied).

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LED The SLICE6 DAS has a single LED indicatorthat shows system status.

LED behavior is summarized below.

Priority*

Condition

Idle; not connected

(0.5 Hz)

Idle; connected

Communicating; idle or real-time

(single flash when command received)

Idle (connected or not connected; low or high power)

(0.5 Hz)

Arming or armed; not recording

Armed; recording

Armed; faulted or triggered

N/A

Booting bootloader

(5 Hz)

N/A

Booting firmware

N/A

Network DHCP initialization (during DHCP

negotiation with server; time out after 30 seconds)

(2 Hz)

* Higher priority will override the lower priority LED state.

Note: There is no post-event indication. The LED transitions automatically based on condition.

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Data Memory Size

With 15 GB of flash memory available for data storage, the SLICE6 DAS can record

~52 minutes of data at the maximum sampling rate (6 channels at 400 ksps). Since the

recording capacity is very large, it is generally best to limit sampling rates and event durations

to the minimum necessary to avoid large and cumbersome data files. Large files take longer

to download and may also be time-consuming to post-process or difficult to share. Use of

the Region of Interest (ROI) download can save a great deal of time if implemented properly.

Sampling Rates

User-selectable sampling rates are available from 2,000 sps to 400,000 sps.

# of

Channels*

Maximum Sampling Rate

(per channel)

400,000 samples per second (sps)

* All channels are recorded even if they are not programmed.

With 15 GB available for data storage, there are 7,500 M samples available (1 sample =

2 bytes). To determine the maximum recording time, divide the number of samples by the

product of the sampling rate and the number of channels.

7,500,000,000

= # of seconds

Sampling rate (sps) X # of channels

Example: 6 channels of data at 400,000 sps

7,500,000,000

= 3,125 sec (52 minutes)

400,000 X 6

Circular Buffer Limitations

Due to the nature of flash memory, the system cannot be armed in Circular Buffer mode

indefinitely. To determine the maximum time available, use the equation below:

0.8 recording time = maximum time available in Circular Buffer mode

Example: 0.8 3,125 sec = 2500 sec (41 minutes)

In this example, the test must occur within 41 minutes, after which time the unit stops

recording data.

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Basic Care and Handling

SLICE6 systems are precision devices designed to operate reliably in dynamic testing

environments. Though resistant to many environmental conditions, care should be taken not

to subject the units to harsh chemicals, submerge it in water, or drop it onto any hard surface.

WARNING:

Electronic equipment dropped from desk height onto a solid

floor may experience up to 10,000 g. Under these conditions,

damage to the exterior and/or interior of the unit is likely.

Your SLICE6 DAS module is supplied with calibration data from the factory. DTS

recommends annual recalibration to ensure that the unit is performing within factory

specifications. The SLICE6 DAS is not user-serviceable and should be returned to the

factory for service or repair.

When not in use or if shipping is required, we suggest that you always recover the connectors

using the plugs provided and place the unit in the padded container originally provided with

your unit.

Shock Rating

Each SLICE6 DAS is rated for 500 g, 3 ms or 2000 g, 0.8 ms half-sine duration, in all axes.

Mounting Considerations

SLICE6 equipment should be bolted securely to the test vehicle or dynamic testing device to

provide the best shock protection. Mounting methods and hardware selection should be

carefully calculated to withstand expected shock loading and facilitate proper grounding.

Check bolt tightness periodically to ensure that 1) the unit is securely fastened to the

baseplate, and 2) the baseplate is securely fastened to the testing platform.

DTS strongly recommends that all equipment be properly grounded to minimize any risk of

data noise due to high-current transients. The test vehicle or dynamic testing device should

be connected to earth ground. SLICE6 equipment should be grounded to each other and

bolted to the test vehicle. DTS recommends checking continuity between the enclosures of

each unit to confirm resistance readings of <1 ohm.

Thermal Considerations

The SLICE6 DAS is a low power device and it is unlikely that self-heating will be an issue in

real-world testing if proper mounting methods are observed. Never mount the unit to a

thermally non-conductive surface like wood or plastic. ALWAYS use SLICE6 DAS with a

heat sink. If you are not mounting the system to a structure that will serve this purpose, DTS

offers a heat sink for use with the SLICE6 DAS (see Appendix A). Should you have any

questions about using SLICE in your environment, please contact DTS.

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