JT/T 883-2014 English PDF (JT/T883-2014)

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JT/T 883-2014: Commercial vehicle driving dangerous warning system technical requirements and test procedures
JT/T 883-2014
TRANSPORT INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 03.220.20; 35.240.60
R 86
Filing No.:
Commercial vehicle driving dangerous warning system
technical requirements and test procedures
ISSUED ON: APRIL 15, 2014
IMPLEMENTED ON: SEPTEMBER 01, 2014
Issued by: Ministry of Transport of PRC
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 4 
4 General requirements ... 5 
5 Functional requirements ... 5 
6 Performance requirements ... 7 
7 Installation and usage requirements ... 7 
8 Test methods ... 8 
Appendix A (Normative) Technical specifications and requirements for early warning
systems ) ... 13 
Commercial vehicle driving dangerous warning system
technical requirements and test procedures
1 Scope
This standard specifies the general requirements, functional requirements, performance
requirements, installation and use requirements, test methods, for the driving dangerous
warning system of commercial vehicles (hereinafter referred to as the warning system).
This standard is applicable to the dangerous warning system for commercial vehicles,
which are equipped with the warning function of the front vehicle collision and the
dangerous state of lane departure.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB 5768.3-2009 Road traffic signs and markings - Part 3: Road traffic markings
GB/T 26773-2011 Intelligent transport systems - Lane departure warning systems -
Performance requirements and test procedures
JT/T 794 GNSS system for operating vehicles - Technical specification for vehicle
terminals
ISO 15623:2002 Transport information and control systems - Forward vehicle
collision warning systems - Performance requirements and test procedures
IEC 60825-1 Safety of laser products - Part 1: Equipment classification and
requirements
3 Terms and definitions
The terms and definitions as defined in JT/T 794, GB/T 26773-2011, ISO 15623:2002,
as well as the following terms and definitions, apply to this document.
3.1
Commercial vehicle driving dangerous warning system
A system, which automatically collects the speed, distance from the front vehicle,
lane, other vehicle running status information, during the driving process of the
commercial vehicle; warns or alerts the driver, by means of including but not limited
to voice prompts, according to the method for judging the dangerous driving status
of the vehicle, which is set in the early warning system; preferentially uses the CAN
bus communication method, to transmit the dangerous state warning information to
the on-board terminal of the road transportation vehicle's satellite positioning system.
The vehicle driving dangerous state includes a front vehicle collision dangerous
state, a lane departure dangerous state, etc.
4 General requirements
4.1 Composition of early warning system
The early warning system shall include a front vehicle collision warning module, a lane
departure warning module, a data communication interface. The front vehicle collision
warning module and the lane departure warning module shall transmit no less than the
following information, to the on-board terminal of satellite positioning system, through
the data communication interface, respectively.
a) Front vehicle collision information: Front vehicle collision warning (primary
collision warning/collision warning), front vehicle distance, relative speed;
b) Lane departure information: Lane departure warning, lane departure direction.
4.2 Others
The appearance, nameplate, text, graphics, signs, materials, enclosure protection of
each module of the early warning system shall meet the requirements of JT/T 794.
5 Functional requirements
5.1 Self-check
The early warning system shall be started, within 30 s after the vehicle is started;
complete the self-check of all the main system sensors and components; clearly indicate
the current working status of the early warning system, by signal lights or display
screens. If there is a fault, it will indicate the fault type and other information, through
the signal light or display screen; transmit it to the on-board terminal of the satellite
positioning system, at the same time.
5.2 Automatic calibration
5.4.3 When driving under normal road conditions, the early warning system shall be
able to detect lane lines, in lighting conditions such as in day, night, dusk, dawn.
5.4.4 When the driver has a tendency to change lanes or turn AND turn on the turn
signal in the correct direction, the early warning system shall not issue a lane departure
warning.
5.4.5 When the wipers act, the early warning system shall work normally.
5.4.6 When the alarm conditions are met, the early warning system shall immediately
send out the lane departure warning information; transmit it to the on-board terminal of
satellite positioning system, at the same time.
5.5 Others
The early warning system shall provide the driver with a human-machine interface,
including indicator lights related to the operating state of the system, alarm information
of dangerous states in the form of sound/tactile/visualization, the operating/stop/fault
state of the system. Indicator lights shall clearly show status in direct sunlight and at
night.
6 Performance requirements
6.1 Overall performance
The early warning system and firmware shall keep working independently and stably
for 24 hours. They shall meet the following performance requirements:
a) Reliability: The mean time between failures (MTBF) of the early warning system
is not less than 3000 h;
b) Scalability: It shall have a CAN bus data interface. It can be equipped with an
RS232 interface or an RS485 interface or other connection to external devices, as
well as a sensor data interface, according to actual needs.
6.2 Others
The electrical performance, environmental adaptation performance, electromagnetic
compatibility performance of the early warning system shall comply with the relevant
requirements of JT/T 794.
7 Installation and usage requirements
7.1 The early warning system shall be installed, in accordance with the manufacturer's
recommendations. It shall not affect the driver's sight. It shall not be installed on
surfaces, which are prone to vibration.
7.2 The main components of the early warning system, such as controllers and sensors,
shall be marked with the manufacturer's logo.
7.3 The windshield shall be kept clean, to ensure the alarm function of the camera-type
early warning system.
7.4 The manufacturer shall provide the installation manual, operation guide, etc. of the
early warning system. The installation manual shall contain documentation, that the
system is properly calibrated and functionally valid. The operating instructions shall at
least describe:
- The minimum speed at which the warning system operates;
- Under what conditions/can the system detect and track the vehicle;
- The type of route signs that can be captured;
- The type of indicator light, which informs the driver of the normal operation of the
system.
8 Test methods
8.1 Test conditions
The test conditions are as follows:
a) Roa...