GB/T 21436-2008 PDF English
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GB/T 21436-2008: Parking distance monitoring and warning device for motor vehicle---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT21436-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
T 04
Parking distance monitoring and warning device for motor
vehicle
ISSUED ON: FEBRUARY 15, 2008
IMPLEMENTED ON: SEPTEMBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Model compilation rules ... 6
4.1 Product code ... 7
4.2 Category code ... 7
4.3 Group code ... 7
4.4 Design No... 7
4.5 Variant code ... 7
5 Requirements ... 8
5.1 General provisions ... 8
5.2 Structure ... 10
5.3 Functional requirements ... 11
5.4 Protection performance ... 15
5.5 Abnormal power supply voltage resistance ... 16
5.6 Electromagnetic compatibility ... 17
5.7 Temperature resistance ... 17
5.8 Vibration resistance ... 18
5.9 Salt spray resistance ... 18
5.10 Temperature and humidity cyclic change resistance ... 18
6 Test method ... 19
6.1 Structural inspection ... 19
6.2 Functional inspection ... 19
6.3 Protection performance test ... 23
6.4 Abnormal power supply voltage resistance test ... 23
6.5 Electromagnetic compatibility test ... 23
6.6 Temperature resistance test ... 24
6.7 Vibration resistance test ... 24
6.8 Salt spray resistance test ... 24
6.9 Temperature and humidity cycle resistance test ... 24
7 Inspection rules ... 24
7.1 Qualified documents and marks ... 24
7.2 Inspection categories ... 24
7.3 Exit-factory inspection ... 24
7.4 Type inspection ... 25
7.5 Acceptance inspection ... 27
8 Marking, packaging, storage, preservation ... 27
Parking distance monitoring and warning device for motor
vehicle
1 Scope
This standard specifies the requirements, test methods, inspection rules, signs,
packaging, storage, custody of parking distance monitoring and warning devices
(hereinafter referred to as distance monitoring and warning devices).
The parking distance monitoring and warning device cannot replace the driver's
automatic parking; it is not a device that alarms other people or objects in the parking
area. The device is only an auxiliary means for parking and cannot reduce the driver's
responsibility for parking.
This standard applies to Classes M and N vehicles.
Note: The functional requirements of this standard are formulated based on the use of ultrasonic
sensor technology. With the development of other sensor technologies, the possibility of
modifying the functional requirements is not excluded.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 2423.17 Basic environmental testing procedures for electric and electronic
products - Test Ka: Salt mist (GB/T 2423.17-1993, eqv IEC 68-2-11:1981)
GB/T 2423.22 Environmental testing - Part 2: Test methods - Test N: Change of
temperature (GB/T 2423.22-2002, IEC 60068-2-14:1984, IDT)
GB/T 2828.1 Sampling procedures - Part 1: retrieval by acceptance quality limit
(AQL) for lot-by-lot inspection sampling plan (GB/T 2828.1-2003, ISO 2859-
1:1999, IDT)
GB/T 4942.2 Degrees of protection provided by enclosures for low-voltage
apparatus (GB/T 4942.2-1993, eqv IEC 947-1:1988)
GB/T 17619 Limits and methods of testing for immunity of electrical/electronic sub-
assemblies in vehicles to electromagnetic radiation
GB 18655 Limits and methods of measurement of radio disturbance characteristics
for the protection of receivers used on board vehicles (GB 18655-2002, IDT
IEC/CISPR 25:1995)
GB/T 21437.2 Road vehicles - Electrical disturbances from conduction and coupling
- Part 2: Electrical transient conduction along supply lines only (GB/T 21437.2-2008,
ISO 7637-2:2004, IDT)
QC/T 413-2002 Basic technical conditions of automotive electrical equipment
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Parking distance monitoring & warning device
An auxiliary device, that can detect obstacles within the monitoring range when the
parking speed does not exceed 0.5 m/s, send a warning signal to the driver, improve
the safety of automobile parking.
3.2
Sensor
It is an important component of the distance monitoring & warning device, which is
used to transmit and/or receive obstacle detection signals.
3.3
Controller
It is an important component of the distance monitoring & warning device, which is
used to control the sensor to send signals, process the sensor received signals, make
the indicator work.
3.4
Indicator
It is an important component of the distance monitoring & warning device, which is
used to send a warning signal to the driver.
3.5
Monitoring range
A specific three-dimensional spatial range in the parking area.
3.6
Standard test tube
White PVC tube used to simulate obstacles when testing the monitoring range,
including vertical standard test tube and horizontal standard test tube. Vertical
standard test tube refers to a white PVC tube which has a diameter of 75 mm and a
length of 1000 mm placed vertically. Horizontal standard test tube refers to a white
PVC tube which has a diameter of 75 mm and a length of 300 mm placed
horizontally.
3.7
Maximum detectable distance
The maximum distance of the vertical standard test tube within the monitoring range,
that can be continuously detected within 2/3 of the vehicle width.
3.8
Reflective wall-shape object
White PVC flat plate which has a length and width both greater than or equal to
1000 mm.
3.9
Self-test
The process by which the controller performs self-test on the reliability of the
detection function of the distance monitoring & warning device.
4 Model compilation rules
The model compilation method of the distance monitoring & warning device is as
follows:
the vehicle.
5.1.4.3 General warning range
A specific spatial range in the rear or front area of the vehicle, which has a horizontal
distance greater than 1000 mm and less than or equal to 1500 mm from the outer end
of the vehicle.
5.1.4.4 Pre-warning range
A specific spatial range in the rear or front area of the vehicle, which has a horizontal
distance greater than 1500 mm from the outer end of the vehicle.
5.1.4.5 Monitoring range in front and rear of the vehicle
A vehicle equipped with a distance monitoring & warning device shall have a
monitoring range behind the vehicle; the monitoring range in front of the vehicle is
optional.
The rear monitoring range includes the impending collision range, the main warning
range, the general warning range, the pre-warning range which is optional. The front
monitoring range includes the impending collision range, the main warning range, the
general warning range and the advance warning range which are optional.
For the distance monitoring & warning device that only monitors the two corner areas
of the vehicle's front monitoring range, its front monitoring range and corresponding
functional requirements are determined by the automobile manufacturer and the
product supplier through consultation.
5.1.5 Indication signal
The distance monitoring & warning device must have an auditory indication; other
indications are optional.
For the distance monitoring & warning device with the vehicle's front monitoring range,
the display and sound alarm frequencies for its front and rear monitoring ranges shall
not be the same.
5.1.5.1 Auditory indication
The alarm frequencies of the auditory indicator are selected from the following
frequencies: 700 Hz, 800 Hz, 900 Hz.
When an obstacle is detected within the pre-warning range, an alarm is issued at an
intermittent frequency of about 1 Hz.
When an obstacle is detected within the general warning range, an alarm is issued at an
intermittent frequency of about 2 Hz.
When an obstacle is detected within the main warning range, an alarm is issued at an
intermittent frequency of about 4 Hz.
When an obstacle is detected within the impending collision range, a continuous alarm
sound is sounded.
The requirements for other auditory indication methods shall be specified in the product
technical specifications.
5.1.5.2 Other indications
The visual indicator with color segment indication is specified as follows:
When an obstacle is detected within the pre-warning range, the green light is
intermittently lit.
When an obstacle is detected within the general warning range, the green light is always
on.
When an obstacle is detected within the main warning range, the green light is always
on and the yellow light is intermittently lit.
When an obstacle is detected within the impending collision range, the green light and
the yellow light are always on and the red light flashes continuously.
The requirements for other indication methods other than color segment indication shall
be specified in the product technical specifications.
5.2 Structure
5.2.1 Dimensions
The external dimensions shall meet the requirements of the drawings.
5.2.2 Appearance
The external surfaces of each component of the distance monitoring & warning device
shall be smooth and flat; it shall not have defects such as dents, scratches, cracks,
deformation, etc. The exposed metal parts shall have a firm anti-rust and anti-corrosion
coating or paint layer on the surface; the metal parts shall not be rusted.
5.2.3 Materials
The materials used for each component shall ensure that the distance monitoring &
warning device has sufficient mechanical strength and service life.
The degree of protection shall comply with the provisions of GB/T 4942.2-1993. When
there are special requirements for the distance monitoring & warning device, it shall be
specified in the product technical conditions.
5.4.2 Waterproof performance
Parts that can be directly exposed to sunlight shall adopt the degree of protection of
IPX5 for water spray test. The installation details and test status of the distance
monitoring & warning device shall be specified in the product technical conditions.
After the test, the distance monitoring & warning device shall meet the requirements
specified in the product technical conditions.
5.4.3 Anti-foreign matter performance
The degree of protection of the components that can be directly exposed to sunlight
shall be IP6X for dust tightness test. The installation details and test status of the
distance monitoring & warning device shall be specified in the product technical
conditions. The conformity assessment of the distance monitoring & warning device
after the anti-foreign matter test shall be carried out in accordance with the provisions
of GB/T 4942.2-1993.
5.5 Abnormal power supply voltage resistance
5.5.1 Power supply polarity reverse connection resistance
The distance monitoring & warning device shall be able to withstand a 1 min power
supply polarity reverse connection test without damage. Reverse voltage value: 14 ±
0.2 V for 12 V power supply system; 28 V ± 0.2 V for 24 V power supply system. After
the test, the distance monitoring & warning device shall meet the requirements specified
in the product technical conditions.
5.5.2 Power supply overvoltage resistance
The distance monitoring & warning device shall be able to withstand a certain value of
power supply overvoltage test without damage. This standard only stipulates the 12 V
power supply system. Its test voltage, test time, and qualification judgment are shown
in Table 3. For other power supply systems, it shall be determined by the automobile
manufacturer and product supplier through consultation.
6 Test method
6.1 Structural inspection
6.1.1 Appearance inspection
6.1.1.1 Dimensions
The appearance dimensions of the distance monitoring & warning device are inspected
with general or special measuring tools.
6.1.1.2 Appearance
The appearance and markings are inspected by naked eye observation.
6.1.2 Materials
Perform in accordance with the provisions of the product technical conditions.
6.2 Functional inspection
6.2.1 Test description
6.2.1.1 Wind speed does not exceed 5.4 m/s, temperature (23 ± 5) °C, relative air
humidity (60 ± 25)%; there are no reflected waves and interference waves around.
6.2.1.2 If the load state of the vehicle is not indicated, the test is carried out according
to the curb weight state.
6.2.2 Self-check function test
The self-check function test method of the distance monitoring & warning device shall
be specified in the product technical conditions.
6.2.3 Maximum detectable distance test
Place the vertical standard test tube 200 mm above the ground; test its center point one
by one on the grid points as shown in Figure 6. Taking the center line as the reference,
the maximum distance at which the vertical standard test tubes at all grid points within
the range of 1/3 on the left and right of the vehicle width are detected and the
corresponding alarm sound is issued.
Place the horizontal standard test tube horizontally within the monitoring range, to test
its center point one by one at the grid points shown in Figures 3 and 4.
If the horizontal standard test tube is not detected at a certain position, but the horizontal
standard test tubes at the 100 mm positions to the left and right of this point (Figure 3)
are detected and the corresponding alarm sounds, the horizontal standard test tube at
this position is deemed to be detected.
6.2.6 Upper and lower cut-off height tests of the monitoring range
6.2.6.1 Upper cut-off height test
Refer to 6.2.5 for the test method. Test at the upper cut-off height determined by the
automobile manufacturer and product supplier at the grid points shown in Figure 3.
6.2.6.2 Lower cut-off height test
The vehicle is fully loaded; spread gravel with a height of 30 mm ~ 50 mm within the
monitoring range. The sensor-mounted component moves horizontally 200 mm ~ 500
mm within the monitoring range at a speed of 0.1 m/s; repeat 10 times.
6.2.7 Side cut-off monitoring range test
A reflective wall-shape object is placed vertically, on a straight line at a certain distance
from both sides of the vehicle width. The reflective wall-shape object shall be parallel
to the side of the vehicle. The reflective wall-shape object is tested in a static and
moving state.
6.2.8 Distinguishing between vertical standard test tube and wall test
Place the center point of the vertical standard test tube at the following specified test
point within the monitoring range; place a 1 m × 1 m reflective wall-shape object
vertically at 0.2 m behind it. The reflective wall-shape object is symmetrical to the test
point (Figure 7).
6.3 Protection performance test
6.3.1 Waterproof test
Parts that can be directly exposed to sunlight shall be subjected to water spray protection
test according to the corresponding provisions of IPX5 test method in GB/T 4942.2-
1993.
6.3.2 Anti-foreign matter test
Parts that can be directly exposed to sunlight shall be subjected to dust tightness test,
according to the corresponding provisions of the IP6X test method in GB/T 4942.2-
1993.
6.4 Abnormal power supply voltage resistance test
6.4.1 Power supply polarity reversal test
All parts of the distance monitoring & warning device are wired normally; then the
power supply polarity is reversed for 1 min at the reverse voltage value specified in
Article 5.5.1.
6.4.2 Overvoltage test
All parts of the distance monitoring & warning device are wired normally; the test
voltage is applied on the voltage input terminal. The test voltage, test duration,
qualification judgment are shown in Table 3.
6.5 Electromagnetic compatibility test
6.5.1 Electromagnetic interference immunity test
6.5.1.1 The electromagnetic radiation interference immunity test of the distance
monitoring & warning device shall be carried out in accordance with the relevant
provisions of GB/T 17619-1998; its specific measurement method shall be specified in
the product technical conditions.
6.5.1.2 The interference caused by conduction and coupling shall be carried out in
accordance with the relevant provisions of ISO 7637-2:2004.
6.5.2 Electromagnetic disturbance test
The electromagnetic disturbance test of the distance monitoring & warning device shall
be carried out in accordance with GB 18655 and meet the provisions of GB 18655.
6.6 Temperature resistance test
It shall be carried out in accordance with the provisions of 4.10 in QC/T 413-2002.
6.7 Vibration resistance test
The distance monitoring & warning device shall be fixed on the vibration test bench
and tested in a non-working state. The severity level of the sweep frequency vibration
test is shown in Table 4.
6.8 Salt spray resistance test
It shall be placed in the same position as on the motor vehicle and tested with a new
distance monitoring & warning device that has not undergone other tests. The test shall
be carried out in accordance with the provisions of Test Ka: Salt spray test method in
GB/T 2423.17-1993.
6.9 Temperature and humidity cycle resistance test
It is carried out according to the provisions of 4.11 of QC/T 413-2002.
7 Inspection rules
7.1 Qualified documents and marks
Each distance monitoring & warning device can be exit-factory after passing the
inspection; it shall be accompanied by a product quality certificate or mark.
7.2 Inspection categories
The inspection rules are divided into exit-factory inspection, type inspection, and
acceptance inspection.
7.3 Exit-factory inspection
7.3.1 Exit-factory inspection items are carried out according to Table 5.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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