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

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

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GB/T 41484-2022: Automotive ultrasonic sensor assembly

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.
GB/T 41484-2022
NATIONAL STANDARD OF THE
PEOPLE 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 appearance after the test shall meet the requirements of 5.1.1. The functional state shall meet the requirements of 5.4.1.1.
Assemblies or units installed outside the vehicle are not required.
5.4.6.6.2 Combined temperature/humidity cycle
Test according to 6.5.6.5.2. During the test, the functional state installed outside the vehicle shall meet the requirements of 5.4.1.1. The appearance after the test shall meet the requirements of 5.1.1. The functional state shall meet the requirements of 5.4.1.1. Assemblies or units installed inside the passenger compartment are not required. 5.4.6.6.3 Steady-state damp heat
Test according to 6.5.6.5.3. The functional state of the last 1h in the test shall meet the requirements of 5.4.1.1. The appearance after the test shall meet the requirements of 5.1.1. The functional state shall meet the requirements of 5.4.1.1.
5.4.7 Ice water shock
Test according to 6.5.7. After the test, the appearance of the assembly or unit installed outside the vehicle shall meet the requirements of 5.1.1. The functional state shall meet the requirements of 5.4.1.1.
Assemblies or units installed inside the passenger compartment are not required. 5.4.8 Salt spray corrosion resistance
5.4.8.1 Corrosion
Test according to 6.5.8.1. After the test, the appearance of the assembly or unit installed outside the vehicle shall meet the requirements of 5.1.1. The functional state shall meet the requirements of 5.4.1.1.
There are no requirements for assemblies or units installed in the passenger compartment.
5.4.8.2 Penetration and functionality
Test according to 6.5.8.2. After the test, the appearance of the assembly shall meet the requirements of 5.1.1. The functional state shall meet the requirements of 5.4.1.1. Figure 6 -- Schematic diagram of detection scene without obstacle
6.5.2 Electrical performance test
6.5.2.1 DC supply voltage
Arrange the test environment according to 6.5.1.1.1. DUT is tested in working mode B2. First adjust the voltage of the DC stabilized power supply to UN. Then gradually adjust the voltage to USmin to stabilize for 10min. Gradually adjust the voltage to USmax and stabilize for 10min. Carry out a functional state inspection during and after the test. 6.5.2.2 Quiescent sleep current
The DUT is in the working mode B1. The ammeter is connected to the power supply line for testing.
6.5.2.3 Overvoltage
6.5.2.3.1 At (Tmax-20???)
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2. The DUT whose UN is 12V shall be tested according to the method in 4.3.1.1.2 of GB/T 28046.2-2019. The DUT whose UN is 24V shall be tested according to the method in 4.3.2.2 of GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.3.2 At room temperature
Arrange the test environment as in 6.5.1.1.1. The DUT is tested in operating mode B2. The DUT whose UN is 12V shall be tested according to the method in 4.3.1.2.2 of GB/T 28046.2-2019. Carry out a functional state inspection during and after the test. 6.5.2.4 Superimposed AC voltage
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2. Test according to 4.4.2 Severity 1 in GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.5 Slow drop and slow rise of supply voltage
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in operating mode B2. Test according to the method in 4.5.2 of GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.6 Slow drop and fast rise of supply voltage
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2.
The test procedure is as follows:
a) In the falling stage, drop from USmax to 0V at a rate of (0.5??0.1)V/min; b) In the rising stage, the voltage rises rapidly from 0V to USmax within 0.5s. Carry out a functional state inspection during and after the test.
6.5.2.7 Supply voltage transients
6.5.2.7.1 Voltage dips
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.6.1.2 of GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.7.2 Reset performance for voltage dips
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.6.2.2 of GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.7.3 Startup characteristics
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method of 4.6.3.2 Level II in GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.7.4 Load dump
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.6.4.2 of GB/T 28046.2-2019. Carry out a functional state inspection during and after the test.
6.5.2.8 Reverse voltage
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.7.2.3 of GB/T 28046.2-2019. After the test, carry out a functional state inspection.
6.5.2.9 Open circuit
6.5.2.9.1 Single wire open circuit
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.9.1.2 of GB/T 28046.2-2019. After the test, carry out a functional state inspection.
6.5.2.9.2 Multi-wire open circuit
2021 and the methods of pulses 1, 2a, 2b, 3a, 3b. Carry out a functional state inspection during and after the test.
6.5.3.2.2 Electrical transient immunity by capacitive coupling of conductors other than power lines
Arrange the test environment according to 6.5.1.1.1 and 6.5.1.2. The DUT is tested in working mode B2, according to the CCC mode in Table B.1, Table B.2 of GB/T 21437.3-2021 as well as the requirements for Level III and the method of 4.5. Carry out a functional state inspection during and after the test.
6.5.3.3 Immunity to electromagnetic radiation
Arrange the test environment according to 6.5.1.1.1 and 6.5.1.2. The DUT is tested in working mode B2, according to the anechoic chamber method, the immunity test strength of high current injection method in 4.7 of GB 34660-2017 and the method in 5.7.
6.5.3.4 Radio disturbance characteristics
6.5.3.4.1 Conducted emissions
The DUT is tested in working mode B2 according to the methods in 6.3 and 6.4 of GB/T 18655-2018.
6.5.3.4.2 Radiated emissions
The DUT is tested in working mode B2 according to the method in 6.5 of GB/T 18655- 2018.
6.5.4 Mechanical property tests
6.5.4.1 Mechanical vibration
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.1.2.4.2 or 4.1.2.7.2 in GB/T 28046.3-2011. Carry out the ring time and functional state inspections during the test. After the test, carry out a functional state inspection.
6.5.4.2 Mechanical shock
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working mode B2 according to the method in 4.2.2.2 of GB/T 28046.3-2011. Carry out the ring time and functional state inspections during the test. After the test, carry out a functional state inspection.
6.5.4.3 Free fall
Arrange the test environment according to 6.5.1.1.1. The DUT is tested in working the method in 5.1.1.1.2 of GB/T 28046.4-2011 with the lower limit of storage temperature and working mode A1 in Table 4. After the test, let it stand for 2h and return to normal temperature. Carry out a functional state inspection for the DUT in the working mode B2.
6.5.6.1.2 Low temperature operation
Arrange the test environment according to 6.5.1.1.2. The DUT is tested with Tmin and working mode B2 according to the method in 5.1.1.2.2 of GB/T 28046.4-2011. During the test and after the test, after standing for 2h to restore normal temperature, carry out a functional state inspection.
6.5.6.2 High temperature test
6.5.6.2.1 High temperature storage
Arrange the test environment according to 6.5.1.1.2. The DUT is tested according to the method of 5.1.2.1.2 in GB/T 28046.4-2011 with the upper limit of storage temperature and working mode A1 in Table 4. After the test, let it stand for 2h and return to normal temperature. Carry out a functional state inspection for the DUT in the working mode B2.
6.5.6.2.2 High temperature operation
Arrange the test environment according to 6.5.1.1.2. The DUT is tested with Tmax and working mode B2 according to the method in 5.1.2.2.2 of GB/T 28046.4-2011. During the test and after the test, after standing for 2h to restore normal temperature, carry out a functional state inspection.
6.5.6.3 Temperature gradient
Arrange the test environment according to 6.5.1.1.2. The DUT is tested in the working mode B2 in the range of Tmin~Tmax, according to the method in 5.2.2 of GB/T 28046.4- 2011. During the test and after the test, after standing for 2h to restore normal temperature, carry out a functional state inspection.
6.5.6.4 Temperature cycling
6.5.6.4.1 Temperature cycling with specified rate of change
Arrange the test environment according to 6.5.1.1.2. The DUT is tested in the working mode B2 in the range of Tmin~Tmax according to the method in 5.3.1.2 of GB/T 28046.4- 2011. During the test and after the test, after standing for 2h to restore normal temperature, carry out a functional state inspection.
6.5.6.4.2 Rapid temperature change with specified transition time
The DUT is tested in the working mode A1 in the range of Tmin~Tmax, according to the method in 5.3.2.2 of GB/T 28046.4-2011. After the test, let it stand for 2h and return to normal temperature. Arrange the test environment according to 6.5.1.1.1. Carry out a functional state inspection for the DUT in the working mode B2.
6.5.6.5 Damp heat
6.5.6.5.1 Damp heat cycle
Arrange the test environment according to 6.5.1.1.2. The DUT is tested in working mode B2 according to the method in 5.6.2.2 of GB/T 28046.4-2011. During the test and after the test, after standing for 2h to restore normal temperature, carry out a functional state inspection.
6.5.6.5.2 Combined temperature/humidity cycle
Arrange the test environment according to 6.5.1.1.2. The DUT is tested in working mode B2 according to the method in 5.6.2.3 of GB/T 28046.4-2011. During the test and after the test, after standing for 2h to restore normal temperature, carry out a functional state inspection.
6.5.6.5.3 Steady-state damp heat
Arrange the test environment according to 6.5.1.1.2. The DUT is tested in working mode A2 according to the method in 5.7.2 of GB/T 28046.4-2011. In the last 1h of the test, the output signal is checked in the working mode B2. After the test, let it stand for 2h and return to normal temperature. Carry out a functional state inspection in the working mode B2.
6.5.7 Ice water shock
The DUT is tested in working mode B2 according to the method in 5.4.2.1 of GB/T 28046.4-2011. After the test, let it stand for 2h and return to normal temperature. Arrange the test environment according to 6.5.1.1.1. Carry out a functional state inspection.
6.5.8 Salt spray corrosion resistance test
6.5.8.1 Corrosion
The DUT is tested in working mode A2 according to the method in 5.5.1.2 of GB/T 28046.4-2011. After the test check according to 6.2.1. Arrange the test environment according to 6.5.1.1.1. Carry out a functional state inspection for the DUT in the working mode B2.
6.5.8.2 Leakage and function
The DUT is tested in working mode B2 according to the method in 5.5.2.2 of GB/T 28046.4-2011. Arrange the test environment according to 6.5.1.1.1. After the test, carry

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