Pass-by noise test system

Overview

The pass-by noise test system measures exterior vehicle noise during acceleration in accordance with ECE R51. Its functions, measurement ranges and accuracy cover all vehicle types, with convenient, efficient operation.

Test programmes

Acceleration test: ECE R51-2015
Constant-speed test: ECE R51-2015

Measured parameters

Vehicle speed, time, distance, acceleration, engine speed, sound level and meteorological parameters (temperature and wind speed).

Main features

Sensor calibration and test-data management.
Configurable vehicle length, reference point and entry/exit-line trigger distances.
On-site printing of results and generation of test reports.
Flexible single-side or both-side testing with runs in both directions.
Automatic hardware triggering at the start and end of each test, with low delay and audible prompts.
Acceleration exterior-noise measurement under ECE R51 Annex 10, Methods A and B, for all vehicle types.
Reliable laser triggering, or optional RTK-based automatic position triggering without laser sensors.
Real-time measurement and calculation of sound pressure level, vehicle speed, engine speed, acceleration time and distance, and average acceleration in the test zone.
Optional ambient-temperature, road-surface-temperature and wind-speed sensors for real-time weather measurements.

Technical specifications

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Exterior pass-by noise test system specifications

Vehicle speed	100Hz GPS, speed measurement range 0-400km/h, speed measurement accuracy : ±0.1km/h, resolution 0.01 km/h
Time	range : unlimited , accuracy : 0.01s
Engine speed	Range 0～30KHz, measurement accuracy: ±5Hz
Built-in printer	prints test results in real time or after testing
Wireless data transmission	Transmission distance 800m
Sound level meter	Range: 22～140dB, accuracy: level 1 Measuring frequency: 10Hz～20KHz, sampling frequency: 48KHz, 24-bit AD Support A, C, Z frequency weighting, Fast, Slow, Impulse time weighting
Calibrator	Accuracy level 1, 94dB/114dB, 1kHz
Data update rate	20～1000Hz, can be set by the host
Temperature measurement	Range: -50℃～150℃, accuracy: ±0.5℃
Wind speed measurement	Range: 0.4～35m/s, resolution: 0.2m/s, accuracy: ±2%
Ground measurement equipment power supply	12V lithium battery pack power supply, continuous use time ≥60h after fully charged
Power supply for vehicle equipment	12VDC (9~36V wide voltage)
12.3 inch touch screen	WIN10 operating system, memory 4GB, solid state hard drive 128GB

System configuration

External noise test system configuration
●System host

●Data processing display: 12.3 inches

●Engine speed sensor: user choice

●Laser trigger sensor: , 1

●Hand controller

●Wireless data transmission module

●Sound level meter (level 1): user choice

●Acoustic calibrator (level 1): user choice

●Sound level data acquisition module

●Tripod: hydraulic buffer

●Temperature sensor: PT100

●Wind speed sensor

●Laser reflector

●Lithium battery pack: 12V