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GB/T 33012.2-2016 English PDF (GBT33012.2-2016)

GB/T 33012.2-2016 English PDF (GBT33012.2-2016)

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GB/T 33012.2-2016: Road vehicles -- Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy -- Part 2: Off-vehicle radiation sources

This Part of GB/T 33012 specifies the test conditions, test location, test equipment, stimulation and monitoring of vehicle, test set-up and test procedure for vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy - off-vehicle radiation sources.
GB/T 33012.2-2016
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.10
T 36
Road vehicles - Vehicle test methods for electrical
disturbances from narrowband radiated electromagnetic
energy ?€? Part 2. Off-vehicle radiation sources
(ISO 11451-2.2005, MOD)
ISSUED ON. OCTOBER 13, 2016
IMPLEMENTED ON. MAY 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Test conditions ... 5
5 Test location ... 6
6 Test equipment ... 7
7 Stimulation and monitoring of vehicle ... 9
8 Test set-up ... 10
9 Test procedure ... 11
Annex A (informative) Functional performance statue classification (FPSC) . 18 Foreword
GB/T 33012 ?€?Road vehicles - Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy?€? consists of four parts.
- Part 1. General;
- Part 2. Off-vehicle radiation sources;
- Part 3. On-board transmitter simulation;
- Part 4. Bulk current injection (BCI).
This Part is Part 2 of GB/T 33012.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009. This Part uses the re-drafting method to amend and adopt ISO 11451-2.2005 ?€?Road vehicles - Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy - Part 1. Off-vehicle radiation sources?€?.
Technical differences between this Part and ISO 11451-1.2005 and the causes are as follows.
- Clause 1 is normatively prepared according to the specifications of GB/T 1.1-2009; - The normative reference ISO 11451-1.2001 is modified to GB/T 33012.1-2016 adopting ISO 11451-1.2005;
- In order to achieve the same understanding and presentation with Part 1, I, II, III, IV, V of Table A.1 are modified to L1, L2, etc., and I, II, III, etc. are understood as state I, II, III, etc.;
- To be consistent with other parts, the structure of Clause 6 is adjusted. This Part also makes the following editorial modifications.
- The content which is not suitable for the emergence in Clause 1 (The
electromagnetic disturbances are limited to narrowband electromagnetic fields.) in the original international standard is moved to Clause 4 ?€?Test conditions?€?; - ?€?a) Vertical polarization?€? and ?€?b) Horizontal polarization?€? in ?€?Figure 1 Example of absorber-lined shielded enclosure?€? of the original international standard are editorial errors, which are modified as ?€?a) Front view?€? and ?€?b) Top view?€? in this national standard;
- To be consistent with other parts, add ?€?NOTE. See GB/T 33012.1-2016 for a Road vehicles - Vehicle test methods for electrical
disturbances from narrowband radiated electromagnetic
energy - Part 2. Off-vehicle radiation sources
1 Scope
This Part of GB/T 33012 specifies the test conditions, test location, test equipment, stimulation and monitoring of vehicle, test set-up and test procedure for vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy - off-vehicle radiation sources.
This Part applies to M, N and O vehicles (not limited to vehicle power systems such as spark-ignition engines, diesel engines, motors).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the dated edition cited applies. For undated references, the latest edition of the referenced document (including all amendments) applies.
GB/T 33012.1-2016 Road vehicles - Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy - Part 1. General (ISO 11451-1. 2005 + A1.2008, MOD)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33012.1- 2016 apply.
4 Test conditions
The applicable frequency range of this test method is 0.01 MHz to 18 000 MHz. Testing over the full frequency range could require different field-generating devices, but this does not imply that testing of overlapping frequency ranges is required. The electromagnetic disturbances are limited to narrowband electromagnetic fields. The user shall specify the test severity level or levels over the frequency range. Suggested test severity levels are given in Annex A.
The following standard test conditions shall comply with the specifications of GB/T 33012.1-2016.
- test temperature;
- supply voltage;
- modulation method;
- dwell time;
- frequency step sizes;
- definition of test severity levels;
- test signal quality.
5 Test location
The test should be performed in an absorber-lined shielded enclosure (simulated open field).
The size, shape and construction of the absorber-lined shielded enclosure may vary considerably. Whether the floor is covered with absorbing material may result in different test results. Typically, the floor is not covered with absorbing material, but such covering is allowed. The minimum size of the shielded enclosure is determined by the size of the test region needed, the size of the field generation device or devices, the needed clearances between these and the largest vehicle to be tested, and the characteristics of the absorbing material. To create the test region, the absorber, field generation system and enclosure shape are selected such that the amount of extraneous energy in the test region is reduced to below a minimum value that will give the desired measurement accuracy. The design objective is to reduce the reflected energy in the test region to -10 dB or less over the test frequency range (not applicable to transmission line system field generation systems). An example of a rectangular shielded enclosure is shown in Figure 1.
Alternatively, the test may be performed at an outdoor test site. The test facility shall comply with national legal requirements regarding the emission of electromagnetic fields.
8 Test set-up
8.1 Vehicle placement (see Figure 3)
The vehicle shall be placed in the test area as shown in Figure 1.
8.2 Field generating device location (relative to vehicle and shielded enclosure) 8.2.1 General
The position or positions of the vehicle relative to the antenna or TLS shall be specified in the test plan.
The radiating elements of the field-generating device shall be no closer than 0.5 m to any absorbing material and no closer than 1.5 m to the wall of the shielded enclosure. 8.2.2 Antenna constraints
No part of the radiating antenna shall be closer than 0.5 m to the outer body surface of the vehicle.
The phase center of the antenna shall be separated by at least 2 m horizontally from the reference point.
No part of an antenna's radiating elements shall be closer than 0.25 m to the floor. There shall be no absorber material in the direct path between the transmitting antenna and the DUT.
8.2.3 TLS constraints
No part of a TLS, with the exception of the ground plane, shall be closer than 0.5 m to any part of the vehicle.
The TLS radiating element or elements shall be separated by at least 1 m vertically from the reference point.
The TLS shall extend centrally over at least 75 % of the length of the vehicle. Particular care needs to be taken when testing heavy vehicles (e.g. buses and large trucks). Under certain conditions related to dimensions and frequency, it is possible that close to 100 % of the applied power can be coupled to the vehicle by a directional coupler mechanism. Room resonances can also have a significant effect on the field uniformity, amplitude and direction under the TLS.
- reference point(s) (or line if 4-probe method is used);
- vehicle mode of operation;
- vehicle acceptance criteria;
- definition of test severity levels;
- vehicle monitoring conditions;
- modulation method;
- polarization orientation;
- vehicle orientation;
- antenna location;
- test report content;
- any special instructions and changes from the standard test.
Every DUT shall be verified under the most significant situations, i.e. at least in stand- by mode and in a mode where all the actuators can be excited.
Additional vehicle positions, antenna locations or both could be needed to ensure complete illumination of the vehicle owing to the narrow beam widths of high-frequency antennas.
9.3 Test method
The test shall be carried out using the substitution method, which is based on the use of forward power as the reference parameter used for field calibration and during testing.
The test is carried out in two phases.
a) field calibration (without the vehicle present);
b) test of vehicle.
The RF power required to achieve the required field strength is determined during the field calibration phase.
NOTE. Hazardous voltages and fields can e...

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