CN102922999B - For vehicle risk motoring condition means of identification and the recognition methods thereof of mountain highway - Google Patents

Abstract

The invention belongs to vehicle risk motoring condition recognition technology field, disclose the vehicle risk motoring condition means of identification for mountain highway and recognition methods thereof.Its device comprises microprocessor, described microprocessor input end is connected to for the car speed sensor of measurement of vehicle speed, for the acceleration pick-up of measuring vehicle acceleration/accel in the horizontal and the obliquity sensor for the measuring vehicle travel gradient, the mouth of described micro-process is connected with the loud speaker for reminding vehicle to be in dangerous motoring condition.Technical solution of the present invention can carry out motoring condition identification to the driving vehicle on mountain highway, when identifying that vehicle is in dangerous motoring condition, by aud. snl., corresponding early warning is carried out to chaufeur, make chaufeur take necessary operation measure dangerous to the traveling wind reducing vehicle, thus reduce the accident rate that vehicle travels at mountain highway.

Description

Device and method for identifying dangerous driving state of vehicles on mountainous roads

technical field

The invention belongs to the technical field of vehicle dangerous driving state recognition, and more particularly relates to a vehicle dangerous driving state recognition device and a recognition method for mountain roads.

Background technique

In recent years, with the continuous development of road transportation in my country, the mileage of mountain roads has also increased year by year, and the number of accidents on mountain roads has also increased, and the severity of accidents is relatively high. On the one hand, due to the uphill, downhill, and sharp turns on mountainous roads, accidents are likely to occur when drivers are inexperienced, unfamiliar with road conditions, or appear to be fatigued or distracted. On the other hand, due to the relatively harsh terrain of mountainous roads and the large altitude difference, the loss of personnel and property caused by accidents is usually much higher than that of non-mountainous roads.

In the process of driving on mountainous roads, based on the above-mentioned various factors that cause accidents, the driver cannot accurately grasp the information such as the slope and shape of the road ahead, so that the driver cannot correctly control the driving speed or driving direction of the vehicle. On road sections with large and sharp curves, the speed of the vehicle is limited. If the driver makes a mistake in the control, the vehicle will be in a dangerous driving state, which greatly increases the probability of accidents. From this point of view, when a vehicle is driving on a mountainous road, the possibility of a dangerous driving state is much higher than that on other non-mountainous roads.

Contents of the invention

In order to make up for the above-mentioned defects, the present invention proposes a vehicle dangerous driving state identification device and its identification method for mountainous roads, which can identify the dangerous driving state of the vehicle, remind the driver to operate correctly in time, and avoid accidents.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to achieve.

Technical solution one:

The vehicle dangerous driving state identification device for mountain roads is characterized in that it includes a microprocessor, and the input terminals of the microprocessor are respectively connected with a vehicle speed sensor for measuring the vehicle speed, and a vehicle speed sensor for measuring the acceleration of the vehicle in the lateral direction. An acceleration sensor and an inclination sensor for measuring the slope of the road on which the vehicle travels, the output end of the micro-processing is connected with a loudspeaker for reminding the vehicle that it is in a dangerous driving state.

The characteristics and further improvement of the above-mentioned technical scheme are:

(1) The vehicle speed sensor is installed on the wheel of the vehicle.

(2) The acceleration sensor and the inclination sensor are respectively installed on the chassis of the vehicle.

(3) The speaker is installed in the cab of the vehicle.

Technical solution two:

The method for identifying a dangerous driving state of a vehicle on mountainous roads is characterized in that the vehicle-mounted microprocessor receives driving parameters during the driving process of the vehicle, and according to the received driving parameters and the dangerous driving state of the vehicle preset in the microprocessor, The critical value is used to determine whether the vehicle is in a dangerous driving state, and if it is in a dangerous driving state, the driver will be reminded.

The characteristics and further improvement of the above-mentioned technical scheme are:

(1) The critical value includes a first critical value, a second critical value, a third critical value, a fourth critical value and a fifth critical value.

(2) The driving parameters include the speed parameter transmitted by the vehicle speed sensor and the slope parameter transmitted by the inclination sensor. When the corresponding relationship between the speed parameter and the slope parameter reaches the first critical value of the preset dangerous driving state of the vehicle, the driver is reminded.

(3) The first critical value of the preset corresponding relationship is: y>25x, wherein, y is a speed parameter, and x is a slope parameter.

(4) The driving parameters include speed parameters and slope parameters. The microprocessor calculates the descending height of the vehicle's driving trajectory within a certain period of time through the speed parameters and slope parameters. If the descending height of the trajectory reaches the second critical value and the speed parameter reaches the third critical value, the driver is reminded.

(5) The driving parameters include a speed parameter and a lateral acceleration parameter. If the speed parameter reaches the fourth critical value and the lateral acceleration parameter reaches the fifth critical value within a certain period of time, the driver is reminded.

Therefore, the technical solution of the present invention can identify the driving state of the driving vehicle on the mountainous road, and when the vehicle is identified as being in a dangerous driving state, the driver will be given a corresponding early warning prompt through the sound signal, so that the driver can take necessary operational measures to reduce the risk of driving. The driving risk of the vehicle, thereby reducing the accident rate of the vehicle driving on the mountain road.

Description of drawings

The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of a vehicle dangerous driving state recognition device for mountainous roads according to an embodiment of the present invention.

Detailed ways

With reference to accompanying drawing 1, the present invention is used for the vehicle dangerous driving state recognition device of mountain road and comprises microprocessor, and the input end of microprocessor is connected with vehicle speed sensor, acceleration sensor and inclination sensor respectively, and the output end of microprocessor is connected with loudspeaker.

The microprocessor can be a DSP processor, which is installed inside the vehicle and is used to receive the driving parameters of the vehicle speed sensor, acceleration sensor and inclination sensor, process the driving parameters, and determine whether the vehicle is in a dangerous driving state. The vehicle speed sensor is installed on the wheel and can rotate with the wheel to measure the vehicle speed. The acceleration sensor is installed on the vehicle body and is rigidly connected to the vehicle chassis through bolts to measure the acceleration of the vehicle in the lateral direction. The inclination sensor is installed on the vehicle body and is rigidly connected to the vehicle chassis through bolts to measure the slope of the road the vehicle is driving on. The loudspeaker is installed near the driver in the cab to remind the driver that the vehicle is in a dangerous driving state.

The method for identifying the dangerous driving state of vehicles on mountainous roads is as follows:

Step 1: The microprocessor presets the critical value of the dangerous driving state of the vehicle;

Step 2: The microprocessor receives the driving parameters during the driving process of the vehicle, and transfers to step 3, step 4 or step 5;

Step 3: The microprocessor determines that the vehicle is on a downhill road, and is prone to a dangerous driving state of insufficient braking;

According to the driving speed and road slope value data, the microprocessor sets the vehicle driving speed as y, the current road slope type is downhill, and the road slope x satisfies y>25x (y is the speed parameter (unit is km/h), x is the slope parameter (unit is °)), the microprocessor recognizes that the current vehicle driving state is in a dangerous driving state.

Step 4: The microprocessor determines that the vehicle is continuously on a continuous downhill road section in a mountainous area, and is prone to a dangerous driving state of brake failure;

If the road slope has been greater than 10% for a certain period of time, and the height of the vehicle's trajectory has dropped by more than 500m, and the vehicle speed is greater than 40km/h, the microprocessor judges that the vehicle is in a dangerous driving state that is likely to cause accidents.

Judgment of vehicle trajectory drop height: When the vehicle is driving on a mountain road, the height change characteristics of the vehicle trajectory directly determine the driving safety of the vehicle. For example, long-term climbing and downhill will affect the driving performance of the vehicle and the driver's Physiological and psychological functions. The height change characteristics of the vehicle trajectory are calculated from the slope and vehicle speed. Firstly, the vehicle speed is integrated to calculate the length of the driving trajectory per unit time, and at the same time, the height change value of the vehicle driving trajectory is calculated by combining the slope value within the time period. According to the two different situations of uphill and downhill, the judgment results include the difference characteristics of the height change of the vehicle within a certain period of time, such as driving uphill or downhill within 5 minutes, or driving uphill and downhill at the same time. Existence, at the same time calculate the height value of the vehicle's ascent or descent within this time period.

Step 5: The microprocessor determines that the vehicle is in a dangerous driving state where the vehicle is in a continuous turning section in a mountainous area and prone to rollover accidents;

If the lateral acceleration of the vehicle during a certain period of time has been in a relatively large range, for example, it has been greater than 0.4g, it indicates that the vehicle has been in a continuous curve state during this period of time. If the vehicle speed is relatively high at this time, for example, the vehicle speed exceeds 40km /h, which indicates that the current vehicle is traveling at a high speed on the curve, and rollover accidents are prone to occur, so it is judged that the current vehicle is also in a dangerous driving state.

Judgment of the driving stability of the vehicle: When the vehicle is driving on a mountainous road, the radius of curvature of the road is usually small, which causes frequent acceleration and deceleration of the vehicle, so the lateral acceleration of the vehicle will change greatly. By analyzing the acceleration data of the acceleration sensor, the acceleration distribution characteristics of the vehicle at the current moment and a certain period of time before are calculated, and at the same time combined with the driving speed of the vehicle, the driving stability of the vehicle is judged. If the driving stability of the vehicle is clarified, the condition that the vehicle is not prone to rollover can be obtained.

Step 6: The loudspeaker reminds the driver that the vehicle is in a dangerous driving state.

The loudspeaker reminds the driver that the vehicle is in a dangerous driving state, and the driver takes necessary measures to reduce the risk of accidents when the vehicle is driving on mountainous roads, thereby reducing the probability of accidents and improving the driving safety of vehicles on mountainous roads.

Repeating the above step 2, step 3, step 4 and step 5 can realize the continuous recognition of the dangerous driving state of the mountain road vehicle.

The technical solution of the present invention can realize corresponding operation prompts to the driver according to different dangerous driving states, thereby realizing targeted identification of various dangerous driving states.

The device of the invention is installed on the vehicle, thereby getting rid of the dependence on the road, so that the device of the invention can be adapted to different mountainous road environments and has better universality.

The present invention also has multiple implementations, but any changes, equivalent replacements, and improvements made within the spirit and essential scope of the present invention are within the protection scope of the present invention.

Claims (2)

1. The method for identifying the dangerous driving state of a vehicle on a mountainous road is characterized in that the vehicle-mounted microprocessor receives the driving parameters in the running process of the vehicle, and according to the received driving parameters and the dangerous driving of the vehicle preset in the microprocessor The critical value of the state is used to determine whether the vehicle is in a dangerous driving state, and if it is in a dangerous driving state, the driver is reminded; The critical value includes a first critical value, a second critical value, a third critical value, a fourth critical value and a fifth critical value; The driving parameters include the speed parameter transmitted by the vehicle speed sensor and the slope parameter transmitted by the inclination sensor, and when the corresponding relationship between the speed parameter and the slope parameter reaches the first critical value of the preset dangerous driving state of the vehicle, the driver is reminded; The microprocessor calculates the descending height of the vehicle trajectory within a certain period of time through the speed parameter and the slope parameter, and if the descending height of the trajectory reaches the second critical value and the speed parameter reaches the third critical value, the driver is reminded; The driving parameter also includes a lateral acceleration parameter, and if the speed parameter reaches the fourth critical value and the lateral acceleration parameter reaches the fifth critical value within a certain period of time, the driver is reminded. 2. The vehicle dangerous driving state identification method for mountain roads as claimed in claim 1, wherein the first critical value of the correspondence is: y>25x, wherein y is a speed parameter, and x is a gradient parameter.