GB/T 41484-2022 English PDF (GBT41484-2022)

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GB/T 41484-2022: Automotive ultrasonic sensor assembly
GB/T 41484-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
CCS T 36
Automotive ultrasonic sensor assembly
ISSUED ON: APRIL 15, 2022
IMPLEMENTED ON: NOVEMBER 01, 2022
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... 5 
4 Symbols and abbreviations ... 6 
5 Requirements ... 6 
6 Test methods ... 17 
7 Inspection rules ... 31 
Annex A (informative) Test method for horizontal field of view of multi-sensor system
... 33 
Annex B (informative) Durability test ... 38 
Annex C (informative) Durability test calculation model ... 40 
Automotive ultrasonic sensor assembly
1 Scope
This Standard specifies the requirements, test methods and inspection rules for
automotive ultrasonic sensor assembly.
This Standard applies to ultrasonic sensor assembly (hereinafter referred to as the
assembly) used in automobiles.
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/T 2828.1, Sampling procedures for inspection by attributes -- Part 1: Sampling
schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 18655-2018, Vehicles, boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of measurement for the protection
of on-board receivers
GB/T 19951-2019, Road vehicles - Disturbances test methods for
electrical/electronic component from electrostatic discharge
GB/T 21437.2-2021, Road vehicles - Test method of electrical disturbances from
conduction and coupling - Part 2: Electrical transient conduction along supply lines
only
GB/T 21437.3-2021, Road vehicles - Test method of electrical disturbances from
conduction and coupling - Part 3: Electrical transient transmission by capacitive
and inductive coupling via lines other than supply lines
GB/T 28046.2-2019, Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 2: Electrical loads
GB/T 28046.3-2011, Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 3: Mechanical loads
GB/T 28046.4-2011, Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 4: Climatic loads
GB/T 28046.5-2013, Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 5: Chemical loads
GB/T 30038-2013, Road vehicles - Degrees of electrical equipment protection (IP-
Code)
GB 34660-2017, Road vehicles - Requirements and test methods of electromagnetic
compatibility
ISO 4892-2:2013, Plastics - Methods of exposure to laboratory light sources-Part 2:
Xenon-arc lamps
ISO 11124-2:2018, Preparation of steel substrates before application of paints and
related products - Specifications for metallic blast-cleaning abrasives - Part 2:
Chilled-iron grit
ISO 20567-1, Paints and varnished - Determination of stone-chip resistance of
coating – Part 1: Multi-impact testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 ultrasonic sensor assembly
In-vehicle electronic devices used to transmit, receive and process ultrasonic signals
and obtain information such as target distance and orientation.
NOTE: The ultrasonic sensor assembly can be divided into individual sensors or the integration of
sensors and control units.
3.2 standard test tube
Standard test setup for reflected ultrasonic signals.
3.3 ring time
The inertia damping decay time of the ultrasonic drive signal emitted by the assembly.
3.4 field of view
The three-dimensional space area that the assembly can detect under specified
conditions.
3.5 detection coverage rate
The effective field of view of the assembly as a percentage of the required field of view.
3.6 resolution
The ability of the assembly to distinguish the minimum change distance of the target.
3.7 starting signal
The command signal used to start the work of the assembly according to the established
communication protocol.
3.8 transceiver device
A test device used to send a start signal to the assembly or send a data frame according
to the established communication protocol, and receive the distance, azimuth and other
signals returned by the assembly, and give instructions by auditory or visual means.
4 Symbols and abbreviations
The following symbols and abbreviations apply to this document.
DUT: device under test
Tmax: maximum operating temperature
Tmin: minimum operating temperature
UN: nominal voltage
Ut: test voltage
USmax: maximum supply voltage
USmin: minimum supply voltage
5 Requirements
5.1 Appearance and structural requirements
5.1.1 Appearance
Test according to 6.2. The appearance of the assembly shall meet the following
requirements:
a) The outer surface of each component shall be smooth and flat, without dents,
scratches, cracks, deformation, burrs, mildew and other defects;
b) The surface of metal parts shall have a uniform protective layer, without blistering,
cracking, peeling, corrosion and mechanical damage;
NOTE: For the assembly with overvoltage protection function, the output signal in the test shall be
determined through negotiation between the supplier and the purchaser.
5.4.2.4 Superimposed AC Voltage
Test according to 6.5.2.4. During the test and after the test, the functional state shall
meet the requirements of 5.4.1.1.
5.4.2.5 Slow drop and slow rise of supply voltage
Test according to 6.5.2.5. During the test, when the voltage is at USmin and after the test,
the functional state shall meet the requirements of 5.4.1.1.
5.4.2.6 Slow drop and fast rise of supply voltage
Test according to 6.5.2.6. During the test, when the voltage is within the range of
USmin~USmax and after the test, the functional state shall meet the requirements of 5.4.1.1.
5.4.2.7 Supply voltage transients
5.4.2.7.1 Instantaneous drop in voltage
Test according to 6.5.2.7.1. During the test, when the voltage is at USmin and after the
test, the functional state shall meet the requirements of 5.4.1.1.
5.4.2.7.2 Reset performance to voltage dips
Test according to 6.5.2.7.2. When the voltage is restored to USmin during the test and
after the test, the functional state shall meet the requirements of 5.4.1.1.
5.4.2.7.3 Startup feature
Test according to 6.5.2.7.3. During the test, when the voltage is at UN and after the test,
the functional state shall meet the requirements of 5.4.1.1.
5.4.2.7.4 Load dump
Test according to 6.5.2.7.4. During the test, when the voltage is within the range of
USmin~USmax and after the test, the functional state shall meet the requirements of 5.4.1.1.
5.4.2.8 Reverse voltage
Test according to 6.5.2.8. The functional state after the test shall meet the requirements
of 5.4.1.1.
5.4.2.9 Open circuit
5.4.2.9.1 Single-wire open circuit
5.4.6.6 Damp heat requirements
5.4.6.6.1 Damp heat cycle
Test according to 6.5.6.5.1. During the test, the functional state installed inside the
passenger compartment shall meet the requirements of 5.4.1.1. The ...