From the beginning of 2014, Japan JNCAP on the safety of accident prevention techniques were evaluated, including the release of a warning or car automatically brakes when a collision may occur, these tests from 2014 began, the results have been published as the evaluation results of the safety performance of prevention .
Since the 2014 introduction of the test to assess the scope has expanded each year, increasing the vehicle to be assessed, in 2017 launched a new assessment of a lane departure control device. The purpose of preventive safety performance evaluation is to allow more users to choose safer cars, reducing traffic accidents.
Japan will assist active safety features like driver called Preventive Safety, namely preventive security technology, which includes AEBS (car-to-car, car-to-person), LDWS, LDPS, RVMS, evaluation projects classified as preventive safety performance assessment (Preventive safety Performance Assessment, PSPA), also known as advanced safety Vehicle (ASV) advanced security technology.
AEBS
AEBS is based on the premise driver safety driving, the front of the car when it detects pedestrians and cars, according to the situation and triggering warning braking. The way visual detection and radar programs, if it detects a front collision hazard exists, the system will alert the driver through sound, light, etc., if the system determines that the driver is not operating the brake and further the system can not avoid the collision, the AEB It will automatically run in order to reduce the security risk driving.
JNCAP for AEBS test, also divided into a vehicle approaching vehicles or pedestrians.
Close to the car test, the test vehicle at a speed of 10 to 60 km / h approaching from behind analog (target) vehicle, and an alarm verification and slow operation state of the brake. In which both the target vehicle is stopped, there are two types of case (CCRM scenes) run at 20 km / h.
Close to human testing, the test vehicle 10 to the speed of 60 km h / close analog pedestrians (targets), and check alarm operating state of the automatic braking system and avoid risks. For example, there are two types of traffic environment: across the road from the left side, a clear line of sight (CPN scene) and across the road from behind parked cars (CPNO scene).
In addition there is a test for the human environment at night, with lights and simulated road environment. Test vehicle moves to a pedestrian crossing the road analog (target), and the operating state check alarm AEB at 30 to 60km / h speed.
The above three tests, alarm or even avoided by the automatic braking operation performed by a collision, or even a collision, the deceleration should be confirmed before the collision and gives scores according to each case.
Note that the running speed condition AEBS recognizable distance and the type and vehicle type detecting means differs. And according to the surrounding environment and pedestrian conditions, such as weather conditions and road conditions, the system may not work or may not be able to achieve satisfactory results.
LDWS & LDPS
JNCAP the lane departure warning system system (LDWS) and lane keeping system (LDPS), both of which are located in the car through the front camera to identify lane lines to achieve, will depend on good weather conditions, and clear the lane line.
Due to snow or dust is difficult to see the white line of the lane line, the system may not issue an alert when the white line disappeared due to various other reasons, the system will not work. Both conditions are the driver is not operating turn signal, and detects when the vehicle deviates will work the lane.
LDWS will warn the driver by sound and light when the vehicle is detected from the lane. The method of testing is that the test vehicle runs on the road at a speed of 60 km / h, 70km / h, and has an undesirable warning that deviates from the white dashed line or the vehicle position is not properly contained. In addition, in low speed, the score is higher than the high speed.
LDPS than LDWS Further, when the system detects the driver's steering operation is not performed, but the car is being or has deviated from the center of the lane, there is danger of collision with the vehicle or adjacent lane outside the lane facility, braking and steering control of the vehicle will, so that the vehicle is returned to the correct lane.
Test method, the test vehicle is 60km / h and 70km / h deviate from the lane line on a road, the vehicle control tests to confirm whether to maintain the lane. When the amount is small given the lane departure high, low scores given amount when the lane departure. Even if the lane deviation amount exceeds a certain amount, if the alert action in place, will be given score.
LDWS of assessment from 2008 has already begun, LDPS began in 2007.
Close to the practical driver assistance functions
In addition to traditional security driver assistance features, preventive safety performance evaluation JNCAP's content, as well as intelligent lights, brake error correction information and blind spot assist functions considered a feature.
Smart lights for "auto-dimming headlight" or "automatic switching headlight" function, designed to automatically change the irradiation range of the headlamp illumination range appropriate according to the traffic situation in front of the night driving. Even with the same function, the device will also be given low speed high.
Correcting the brake lie, in order to correct the brake pedal and the accelerator pedal errors, the test method is to simulate a test vehicle near the vehicle (target) from a stopped state and the accelerator pedal is depressed abruptly. That time to confirm whether to suppress sudden starts and rapid acceleration in order to prevent a collision or damage.
In this test, two types of traffic environment is assumed for testing: When the vehicle moves forward from a forward position from the state of the vehicle and when the vehicle is moved rearward retracted position. This evaluation began in 2003.
2015, JNCAP increase the blind spot monitoring of the test by placing the observation object (bar), it is possible to cover all the rear region of high accident risk to simulate the behavior of the driver in conjunction with backward movement of pedestrian and other experimental data and model obtained.
Rating system
JNCAP preventive safety driving score, total score of 126 points, points AEB vehicle collision avoidance (out of 32), AEB line air defense of collision (out of 65), lane keeping system (out of 16), blind spot monitoring system (out of 6) intelligent lamp (out of 5), the brake system error correction (out of 2). In this scoring system, you can see the human driver assistance systems focus.
In evaluating vehicle JNCAP published 2018, Suzuki Solio obtained 111.1 points, wherein full power is obtained AEB CCR 32 minutes, AEB VRU pedestrian obtain 62.1 points, 8 points the LDPS; Subaru Forrester score 122.3, AEB CCR obtain full-fat 32 points, AEB VRU pedestrian obtain 61.3 points, 16 points to obtain the LDPS; Toyota Corolla movement out 122.4, AEB CCR 32 minutes to obtain full power, AEB VRU pedestrian score 65 points, 16 points to obtain the LDPS, 6 points blind, the brake correction 2 points out has not been only intelligent lights, it took 1.4 points. Other Mitsubishi, Honda, Mazda car industry to obtain the corresponding score.
Japan JNCAP, compared to Europe, China's evaluation system, an earlier start time, the corresponding evaluation projects closer to the user, behind the Japanese automobile industry developed, is the self-restraint of development planning and rhythm. Read the full text of the original title: Japan JNCAP, starting as early as the slow process | GGAI perspective
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