AccelerometerSolutions for Dynamic Vehicle Testing

VehicleAcceleration Measurement

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Vehicle Acceleration Measurement

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Power Train: Engine, transmission, mounts and inlet system

Modal Analysis/ Structural Testing: Full body, sub- systems and components

Durability: Full vehicle/chassis and subsystems

Ride Quality/NVH: Full vehicle, sub- systems and components

Environmental Testing:

Subsystems and components

Crash Safety Testing: Crash Impact Sound

Sensing (CISS) for full body

impact testing

Accelerometers are commonly used in vehicle testing to measure and evaluate various performance criteria. Acceleration measurements complement vehicle devel-opment and testing to enhance reliability, durability, comfort, security, ride quality and noise vibration & harshness (NVH).Kistler's IEPE* accelerometers offer many vehicle application benefits. For example,

PiezoStar® accelerometers have very low temperature sensitivity which is ideal for dynamic temperature applications. K-Beam® variable capacitance acceler- ometers provide DC response with low noise and temperature sensitivity. TEDS** capability allows the customer to save in implementation time when many measuring chains are involved (i.e. during

modal analysis investigations). Kistler's high impedance accelerometers provide measurements up to 250 °C (482 °F) and measurement range flexibility with an external charge amplifier. Vehicle testing requirements demand sensor technol-ogies that span the application needs – as provided by Kistler accelerometers.

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Vehicle Acceleration Measurement

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K-Beam® Type 8315A…TA

K-Beam® Type 8315A...AC

K-Beam® Type 8315A…TB

K-Beam®

Type 8395A...

PiezoStar® Type 8766A...

PiezoStar® Type 8765A250M5

Ceramic Shear Type 8763B...

PiezoBeam® Type 8688A...

Ceramic Shear Type 8762A...

Ceramic Shear Type 8278A...

Ceramic Shear Mini Type 8778A...

Ceramic Shear Type 8714B...

PiezoStar® Type 8703A...

K-Shear® Shock Type 8742A5...

PiezoStar® Type 8766A…

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Optimizing vibration performance by analyzing the transfer path of the engine, transmission, mounts and exhaust system, requires accelerometers with high tempera-ture capability. PiezoStar® Types 8766A…. and 8765A250M5, or our Ceramic Shear Type 8763B… triaxial accelerometers

provide measuring ranges from 50 g ... 2,000 g. Select models are available for tem-peratures up to 165 °C (330 °F). PiezoStar®

accelerometers provide the lowest tempera-ture sensitivity, minimizing measurement errors related to temperature.

Environmental testing subjects test items to one, some, or all of the following: tempera-ture, humidity, altitude/pressure, sinusoi-dal vibration, random vibration and shock. Such testing is performed to verify product design, manufacturability and reliability, in additon to ensuring survivability in the ap-plication. Miniature accelerometers, such as Types 8278A..., 8778A..., and 8714B...,

can be mounted in the tightest locations and have low mass loading. Type 8278A... is a high impedance accel-erometer capable of temperatures up to 180 °C (350 °F). PiezoStar® Type 8703A provides the lowest sensitivity to tempera-ture in order to minimize temperature errors in both control and response accelerometers.

Triaxial modal accelerometers, like PiezoBeam® Type 8688A… and Ceram-ic Shear Type 8762A…, offer inexpensive solutions for SIMO or MIMO structural test-ing. Such testing includes "body in white" investigations, which require a large num-ber of high performing accelerometers at

low cost. Kistler modal accelerometers pro-vide three measurement ranges (5 g, 10 g, 50 g) and offer accurate frequency and phase response in the specified frequency range. Type 8640A... single-axis modal acceler-ometers are also available in 5 g, 10 g, and 50 g ranges with low mass and low noise.

Chassis testing on hydropulse shakers is performed to simulate various driving con- ditions and assess the durability of the vehicle. Such testing requires accelerom-eters with low frequency response, as

provided by the Kistler K-Beam® variable capacitive MEMS accelerometers like Types 8315A...TA and 8315A...AC. These models also include differential, bipolar, and single-ended signal formats.

Maximizing fuel efficiency and minimizing pollution by reducing weight and improving aerodynamic efficiency are common requirements. Optimization has reduced effective mass that was historically the means of providing resistance to undesir-able noise and vibration transmission. Tech-niques have been developed to quantify "driving condition" inputs and "how they

feel"outputs to the occupants using accel-erometers. Kistler K-Beam® variable capac-itive MEMS accelerometer Types 8315A...TB and 8395A... provide DC response and stability to measure the transmissibility from road inputs to passenger feel. The IEPE PiezoStar® triaxial Type 8766A... and ceramic shear IEPE triaxial Type 8763B... are also considerations for NVH testing.

The metal deformation and metal-to-metal impacts excite very high frequency response in a vehicle during impact in comparison to standard decceleration mea-surements of the impact. For Crash Impact Sound Sensing (CISS), IEPE accelerometers

have sufficient high resonance frequencies for testing. Type 8742A5... and Type 8766A1K0AB are IEPE single and triaxial accelerometers which provide re-spectively over 100 kHz and 55 kHz resonance frequency. The sensors are easily glued or screwed to the test structure.

Power Train/NVH

Modal Analysis/Structural Testing

Durability

Ride Quality/NVH

Crash Safety Test

Environmental Test

Picture scale: 70 % - except Type 8395A... (35 %)

Kistler Instrument Corp.75 John Glenn DriveAmherst, NY 14228 USATel. 716-691-5100 Fax 716-691-5226info@kistler.com

Find your local contact onwww.kistler.com

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*IEPE = Integrated Electronics Piezoelectric** TEDS = Transducer Electronic Datasheet. Characteristic data stored digitally inter-

nal to sensor, IEEE 1451.4 compliant.

Note: Only selected sensors and measurement ranges are listed above. Please reference the Kistler accelerometer catalog (900-380) or visit www.kistler.com for the entire Kistler product portfolio and all measurement ranges. K-Beam®, PiezoBeam®, K-Shear® and PiezoStar® are registered trademarks of Kistler Holding AG.

Additional informationDoc. No. Description900-380 Acceleration (catalog)920-240 PiezoStar® Crystals (special print)700-340 PiezoStar® Accelerometers (brochure)

Accelerometers

TypeRange g

Sensitivity mV/g

Frequency response Hz ±5 %

Temperature range °C (°F)

Threshold g

Mass grams

Ground isolation Axes

TEDS

option Pow

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rain

Mod

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est

Dur

abili

ty

Rid

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alit

y/N

VH

Cra

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Envi

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enta

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8278A500 ±500 –1.3 (±20 %) 1 … 10,000–75 ... 180(–100 … 350)

depends on charge amp.

0.7 yes 1 no x

8315A050 ±5080 (Output A), 40 (Output B)

0 … 1,000–55 ... 125(–65 ... 255)

0.008715 (Ti), 12 (Al)

yes 1 no x x

8315A200 ±20020 (Output A), 10 (Output B)

0 … 1,000–55 ... 125(–65 ... 255)

0.03515 (Ti), 12 (Al)

yes 1 no x x

8315A2D0 ±22,000 (Output A), 1,000 (Output B)

0 … 250–55 ... 125(–65 ... 255)

0.0003515 (Ti), 12 (Al)

yes 1 no x x

8395A2D0 ±2 2,000 0 ... 250–55 ... 125(–65 ... 255)

0.00035 30 yes 3 no x x

8688A5 ±5 1,000 (10) 0.5 … 3,000–40 ... 55(–40 … 130)

0.00014 6.7 with pad 3 yes x

8688A50 ±50 100 (10) 0.5 … 5,000–40 ... 65(–40 … 150)

0.00036 6.5 with pad 3 yes x

8703A250M1 ±250 20 (±5 %) 0.5 … 10,000–55 ... 165(–65 … 330)

0.006 8.1 yes 1 no x

8714B100M5 ±100 50 (±10 %) 1 … 10,000–55 ... 165(–65 … 330)

0.002 5 yes 1(120 °C/

250 °F only)x

8742A5 ±5,000 1 (±5 %) 1 … 10,000–55 ... 120(–65 … 250)

0.13 4.5 with pad 1 no x

8763B050Bx ±50 100 (±15 %) 0.5 ... 7,000–55 ... 100(–65 … 212)

0.0004 5 with pad 3 yes x x x

8763B2K0Ax ±2,000 2.5 (±15 %) 1 ... 10,000–55 ... 120(–65 … 250)

0.0045 4 with 3 yes x x x

8763B500Bx ±500 10 (±15 %) 1 ... 10,000–55 ... 120(–65 … 250)

0.0025 4 with pad 3 yes x x x

8765A250M5 ±250 20 (±10 %) 1 … 9,000–55 ... 165(–65 … 330)

0.002 6.4 yes 3 no x

8766A050Bx ±50 100 (±10 %) 1 … 5,000–55 ... 165(–65 … 330)

0.002 7 with pad 3 yes x x x

8766A1K0Ax ±1,000 5 (±10 %) 1 ... 12,000–55 ... 165(–65 … 330)

0.020 4 with pad 3 yes x x x

8766A500Bx ±500 10 (±10 %) 0.5 … 8,000–55 ... 165(–65 … 330)

0.01 4 with pad 3 yes x x

8778A500 ±500 10 (±5 %) 2 … 9,000–55 ... 120(–65 … 250)

0.01 0.4 yes 1 no x

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