Passer aux informations produits
1 de 9

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 37153-2018 English PDF (GBT37153-2018)

GB/T 37153-2018 English PDF (GBT37153-2018)

Prix habituel $145.00 USD
Prix habituel Prix promotionnel $145.00 USD
Promotion Épuisé
Frais d'expédition calculés à l'étape de paiement.
Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 37153-2018
Historical versions: GB/T 37153-2018
Preview True-PDF (Reload/Scroll if blank)

GB/T 37153-2018: Acoustic vehicle alerting system of electric vehicles running at low speed
GB/T 37153-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.20
T 35
Acoustic vehicle alerting system
of electric vehicles running at low speed
[ECE-R138, Uniform provisions concerning the approval of Quiet Road
Transport Vehicles with regard to their reduced audibility (QRTV), NEQ]
ISSUED ON. DECEMBER 28, 2018
IMPLEMENTED ON. JULY 01, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 General requirements ... 6 
5 Test methods ... 8 
Acoustic vehicle alerting system
of electric vehicles running at low speed
1 Scope
This Standard specifies requirements and test methods for vehicle speed range,
sound level limit, frequency requirements, sound type, and pause switch of
acoustic vehicle alerting system of electric vehicles running at low speed
(hereinafter referred to as “acoustic-alerting system”).
This Standard is applicable to pure electric vehicles of the Category-M1 and N1
categories, hybrid electric vehicles with pure electric driving modes, and fuel
cell electric vehicles.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB 1495, Permissible noise limit emitted by power-driven vehicles
GB/T 3241-2010, Electroacoustics - Octave-band and fractional-octave-
band filters
GB/T 3785.1-2010, Electroacoustics - Sound level meters - Part 1.
Specifications
GB/T 12534, Motor vehicles - General rules of road test method
GB/T 15173-2010, Electroacoustics - Sound calibrators
GB/T 19596, Terminology of electric vehicles
GB 50800-2012, Technical code for anechoic and semi-anechoic rooms
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
19596 as well as the followings apply.
3.1 acoustic vehicle alerting system; AVAS
a system for issuing a prompt sound to effectively transmit information to other
road users when the noise value emitted by the vehicle is below a certain value
3.2 acoustic vehicle alerting system of electric vehicle running at low
speed
a prompt sound from the vehicle’s acoustic-alerting system when the speed of
the electric vehicle is lower than a certain value
3.3 acoustic vehicle alerting system pause switch
a device for turning on/off the alerting on an electric vehicle
3.4 frequency shift
the change caused when prompt tone rate of electric vehicle driving at low
speed varies as vehicle speed
3.5 front plane of the vehicle
a vertical plane tangent to the front edge of the vehicle
3.6 rear plane of the vehicle
a vertical plane tangent to the trailing edge of the vehicle
3.7 sound pressure level; SPL
the base 10 logarithm of the ratio of the square root sound pressure to the
reference sound pressure multiplied by 20
NOTE. Expressed in decibels (dB).
3.8 weighted sound level
sound level measured by a weighted network filter
3.9 total sound level
according to a certain method of weighting, the parameters of the integrated
sound strength that are consistent with the characteristics of the human
auditory system are finally obtained; the range of sound frequencies covered is
20Hz~20kHz
The vehicle manufacturer may offer a variety of alternative sound types. Drivers
can choose. And each sound shall meet the requirements of 4.1~4.3 when
tested in Clause 5.
The acoustic-alerting system of electric vehicle running at low speed cannot
use special vehicle’s specific sound effects. It is recommended to use a sound
similar to a traditional engine.
4.5 Pause switch
4.5.1 For vehicles equipped with the acoustic-alerting system, the manufacturer
can choose whether to configure the pause switch.
4.5.2 The pause switch shall be placed in a position where the driver can see,
touch and operate under normal driving conditions.
4.5.3 When the pause switch is activated, there shall be a clear signal device
(acoustic, optical, electrical or other device) release signal to alert the driver
that the acoustic-alerting system running at low speed has been suspended.
4.5.4 When the vehicle is returned to the "OFF" state with the key or the start
button and then restarted, the acoustic-alerting system shall start working again.
4.5.5 If the vehicle is equipped with a pause switch, the manufacturer shall
make the following instructions to the customer regarding the functional impact
in the user manual information.
“The acoustic-alerting system pause-switch can only be used when there is no
other road user in a short distance AND the surrounding environment obviously
does not need an acoustic-alerting system.”
5 Test methods
5.1 Test equipment
5.1.1 Meteorological measuring equipment
Meteorological measuring instruments are mainly used to monitor
environmental conditions during the test. The accuracy shall meet the following
requirements.
- Temperature measuring equipment. ±1°C;
- Wind speed measuring equipment. ±1m/s;
- Air pressure measuring device. ±5hPa;
- Relative humidity test equipment. ±5%.
5.2 Weather condition
During the test, meteorological conditions shall meet the following requirements.
- Temperature. 5°C ~ 40°C;
- Wind speed. ≤5m/s.
Meteorological equipment shall provide representative data of the test site and
shall be placed in an area close to the test area. Its height shall be the typical
microphone height.
During the test, there shall be no sediment in the air (such as rain, hail, etc.),
and the surface of the test site shall be kept dry.
During the test interval, the values of temperature, wind speed, wind direction,
relative humidity, and air pressure shall be recorded.
5.3 Test site
5.3.1 Outdoor test
5.3.1.1 Outdoor test conditions
Outdoor test sites and pavements shall comply with the requirements of GB
1495.
There must be no large reflective objects in the space with a radius of 50m in
the center of the road, such as walls, rocks, bridges or other buildings. The test
road and the ground of the site shall be kept dry and there shall be no sound-
absorbing materials such as powdered snow or loose debris.
5.3.1.2 Microphone position
The microphone placement position is shown in P and P' in Figures 1 and 2. Its
distance to the CC' line is 2.0m ± 0.05m, and 1.2m ± 0.02m upward on the
ground surface. The reference direction shall be horizontal and point vertically
to the CC' line of the vehicle's operation.
4.5≤ΔL< 6 1.5
3≤ΔL< 4.5 2.5
ΔL< 3 Invalid test data
If there is a clear abrupt sound in the measurement, the measurement result
shall be invalid.
The correction of the measurement result is effective only when the difference
between the maximum value and the minimum value in the background noise
measurement is ≤2dB.
When the difference between the maximum value and the minimum value in
the background noise measurement is >2dB, the correction of the
measurement result is effective only when the noise outside the vehicle
exceeds the background noise by 10dB (including 10) or more.
When the difference between the maximum value and the minimum value in
the background...
Afficher tous les détails