KR20160109616A - System For Collecting And Analyzing Big Data By Monitoring Car's And Road's Conditions - Google Patents

Abstract

Disclosed is a big data collection and analysis system which includes: a mobile communication terminal; a vehicle state monitoring device connected with the mobile communication terminal through Bluetooth communication; and a safe-driving guide server receiving vehicle state data, collected by the vehicle state monitoring device, and vehicle position and vibration data, generated by the mobile communication terminal, from the mobile communication terminal, and evaluating a road state from the received vehicle state data, and guiding safe-driving based on the evaluated road state and the received vehicle state data. In the big data collection and analysis system, the safe-driving guide server evaluates a road state of a corresponding position as safety or danger by evaluating a vibration pattern or vibration level depending on the speed and position of the vehicle, and warns the mobile communication terminal of the reduction of speed up to not higher than a speed for the road state to be safe when the vehicle is driving at a dangerous speed for the road state. According to the present invention, the big data collection and analysis system is capable of inducing a driver to safely drive a vehicle by evaluating a road state from vehicle state information and guiding a speed to make the driver to safely drive the vehicle depending on the road state.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large data collection and analysis system using vehicle and road condition monitoring,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a large data collection and analysis system using vehicle and road condition monitoring, and more particularly, And more particularly, to a big data collection and analysis system using vehicle and road condition monitoring, which guides the driver to drive at a safe speed according to the road condition by evaluating the road condition as safety or danger.

In recent years, there has been a growing interest in safe driving and improved fuel economy driving. Accordingly, an electronic device for safe operation is mounted on the vehicle. Further, in order to induce fuel economy improvement operation, a vehicle condition monitoring device has been developed that provides information to the driver about the vehicle condition provided by a vehicle diagnostic device (OBD) mounted on the vehicle.

A proposal for a technology for monitoring information on the state of the vehicle is disclosed in Patent Registration No. 10-0400347 (registered on September 22, 2003), Patent Publication No. 2002-0007474 (published on Jan. 29, 2002) Patent Publication No. 2001-0100954 (published on November 14, 2001), Patent Publication No. 2003-0039108 (published on May 17, 2003), Patent Registration No. 2002-0048459 No. 10-0866617 (registered on October 28, 2008), and patent registration No. 10-1430071 (registered on April 08, 2007).

On the other hand, Patent Registration No. 10-1418091 (registered on April 03, 2013) discloses a system and a method for measuring a road surface flatness using a database and a vehicle speed correction. This patent invention measures the flatness of the road surface based on the change of the inclination or the vibration of the vehicle during the running of the vehicle and filters the change of the inclination or the vibration caused by the unique driving situation of the vehicle, The flatness information is provided, and the flatness of the road surface can be measured regardless of the speed of the vehicle.

In addition, inventions relating to the measurement of the flatness of the road surface can be found in Patent Registration No. 10-1168503 (registered on July 07, 2012) and Patent Registration No. 10-1206064 (registered on November 22, 2012).

The above-mentioned patent registration No. 10-1418091 proposes that systematic road management can be performed by dividing the road state measured according to the inclination of the vehicle into, for example, a safety stage, a danger stage and a maintenance stage. However, these proposals are only proposed from the viewpoint of systematic road management, and it is difficult to provide direct guidance for driver's safe driving.

For a driver to drive safely, simply knowing the state of the road is not enough. In order for the driver to drive safely, it is necessary to provide guidance on how fast the vehicle should be driven depending on the state of the road.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a big data collection and analysis system using a vehicle and road condition monitoring which enables a driver to safely drive by guiding the speed at which a driver can perform safe driving according to road conditions .

It is also an object of the present invention to provide a vehicle and a vehicle which are capable of performing a fuel cut inertial travel by informing a driver of a notification of performing a fuel cut inertial travel when the vehicle is traveling on a downhill section to an inclination, And a large data collection and analysis system using road condition monitoring.

According to an aspect of the present invention, there is provided a system and method for collecting and analyzing large data using vehicle and road condition monitoring, including a mobile communication terminal supporting Bluetooth communication, a GPS receiver and a vibration sensor, A vehicle status monitoring device connected to the OBD by wire or wireless communication and connected to the mobile communication terminal by Bluetooth communication, data regarding the vehicle status collected by the vehicle status monitoring device, Receives the data about the position and the vibration of the vehicle generated by the vehicle from the mobile communication terminal and stores the data in its own database, evaluates the road condition from the data on the received vehicle condition, Based on the evaluated road conditions, And a safety driving guide server for guiding the driver.

The safe driving guidance server evaluates the vibration level or the vibration pattern according to the position and the speed of the vehicle, evaluates the road condition at the corresponding position as safety or danger, and when a vehicle is traveling at a dangerous speed, And informs the mobile communication terminal of the vehicle that the speed of the vehicle is lower than the speed at which the road condition becomes safe.

The safe driving guidance server evaluates the road condition of the corresponding position from any one of the normal road, the porthole, the protruding jaw, the rough road, the slippery road and the curved road from the vibration pattern corresponding to the position and the speed of the vehicle, It is desirable to notify the user of the problem.

The safe driving guidance server may be configured to have any one of a road state having a dangerous element in front of the vehicle, that is, a porthole, a protruding jaw, a rough road, a slippery road, and a curved road, even if a vehicle is not traveling at a dangerous speed It is preferable to notify the mobile communication terminal of the safe speed at which the vehicle can safely operate in such a road condition.

It is preferable that the content of the notification regarding the safe driving is evaluated on the basis of data received from other vehicles preceding the vehicle receiving the notification for the corresponding position.

The safe driving guide server notifying the mobile communication terminal of a fuel cutoff inertial travel when the vehicle is traveling on a downhill section with an inclination;

Calculating a running resistance (F) for the vehicle speed (V ₁ ), that is, the reference speed (V ₁ ), at the start point of the downhill section or at the fuel cutoff inertial running start point;

Temporarily setting a recirculation start speed (V ₂ ) at which the fuel shutdown inertial travel is stopped and the re-acceleration is started in the downward section;

Running resistance (F) = chajung (W) x deceleration (a _{pew eolkeot)} ... ... ... ... ... (One)

Calculating a deceleration (a _{fuel cut} ) according to the above formula (1);

V = V ₁ - Σ (a _{pew eolkeot} x Δt) ... ... ... ... ... (2)

Calculating a velocity (V) profile of the vehicle during fuel cut inertia traveling until V = V _{2 according} to equation (2);

s _{Fuel Cut} = Σ (V x Δt) _{Fuel Cut} ... ... ... ... ... (3)

Calculating the expression (3) Pugh eolkeot total distance (s _{Pew eolkeot)} traveled while the vehicle is in the fuel cut traveling by inertia;

V ₁ - V ₂ = a _ashes x t _ashes ... ... ... ... (4)

(4), the time taken until the vehicle accelerates to a reference speed (V ₁ ) accelerated to a preset reference speed (a _{rest speed} ), which is a preset constant in the memory, after the vehicle ends the fuel cutoff inertial running Δt _{re-acceleration} );

s _{re-acceleration} = V _{re-acceleration average velocity} x Δt _{Re-acceleration} ... ... ... ... ... (5)

(Wherein, V _{material in an average rate = (V 1 + V 2)} / 2 Im)

To, after the vehicle fuel cut inertia driving end ash rate (a _{material in)} in a driving material into a total travel until the acceleration and the reference velocity (V _1), the distance (s _{material inside)} by the formula (5) Calculating;

(S) from the start point of the downhill section to the end point of the downhill section, that is, the length (s) of the downhill section or the distance s from the fuel cut off inertial running start point to the end point of the downhill section, the step of determining whether the fuser eolkeot match compared to the sum of the total distance (s _{Pew eolkeot)} and the material in the total running distance (s _{material inside);}

The length (s) or a distance (s) is the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total running distance are consistent with the sum of (s _{material inside),} beginning in the material is set to the tentative speed (V ₂ );

The length (s) or a distance (s) is the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total running distance is greater than the sum of (s _{material inside),} a material in a starting velocity is set to the temporary ( V ₂ ), and repeating the above-described steps.

The length (s) or a distance (s) is the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total distance is less than the sum of (s _{material inside),} a material in a starting velocity is set to the temporary ( V ₂ ), and repeating the above steps. And

When the vehicle is in the fuel cut-off inertia running in the downhill section, when the speed of the vehicle reaches the definite set recoat start speed (V ₂ ) in the downhill section, To the mobile communication terminal.

Driving resistance (F) = rolling friction resistance + air resistance - gradient resistance + internal resistance ... ... ... ... ... (1-1)

Rolling friction resistance = Rolling resistance coefficient x Car weight x Gravity acceleration ... ... ... ... ... (1-2)

Air resistance = air resistance coefficient x speed ² ... ... ... ... ... (1-3)

Gradient Resistance = Vehicle Weight x Gravity Acceleration x sin θ ... ... ... ... ... (1-4)

(Where, &thetas; is the inclination angle of the downward section)

Internal resistance = Internal resistance factor x Engine speed ... ... ... ... ... (1-5)

(Where the various coefficients in the above equations are determined from measurements taken from vehicle experiments)

It is preferable that the running resistance F is calculated by the above equations in the downward section.

The safe driving guidance server may provide guidance to the mobile communication terminal of the vehicle different from the consumable product replacement period for replacement of the consumable item, or may be a failure of the vehicle diagnosed by the vehicle diagnostic device (OBD) It is preferable to provide a guidance on the abnormal state.

The safe driving guidance server may also notify the contents of the expendable item to be exchanged to a vehicle manufacturer, a sales company or a computer of a vehicle maintenance company by wired or wireless communication, or a repair content for resolving a failure or an abnormal condition of the vehicle.

The big data collection and analysis system using the vehicle and road condition monitoring according to the present invention evaluates the road condition from the information about the vehicle condition and guides the speed at which the driver can perform safe driving according to the road condition, To operate safely. The big data collection and analysis system of the present invention also contributes to the fuel efficiency improvement of the vehicle by inviting the driver to perform the fuel cut inertial travel in the downward slope region. The Big Data Acquisition and Analysis System of the present invention also provides the driver and the vehicle manufacturer, the vehicle seller or the vehicle maintenance company with information on the replacement of consumables and the failure or abnormal condition of the vehicle so that the driver can conveniently carry out the vehicle management It does.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a schematic configuration of a big data collection and analysis system using vehicle and road condition monitoring of the present invention. FIG.
Fig. 2 is a flowchart showing operations related to safe operation of the guide server in the big data collection and analysis system of the present invention.
Figs. 3 to 5 are flowcharts illustrating operations related to fuel economy improvement operation of the guide server in the big data collection and analysis system of the present invention.
6 is a flowchart of a method by which the guide server sets the reference speed V ₁ of the vehicle in the big data collection and analysis system of the present invention.
7 is a flowchart of another method by which the guide server sets the reference speed V ₁ of the vehicle in the big data collection and analysis system of the present invention.
8 is a graph showing the fuel consumption rate and fuel consumption obtained in an experiment in which the vehicle travels without fuel cutoff inertial travel in a downward section.
9 is a graph showing the fuel consumption rate and the fuel consumption obtained in the experiment in which the fuel cutoff inertia travel and the reacceleration are performed in the downward section.
FIG. 10 is a diagram illustrating a situation in which simulation is performed to verify that the rebounding running after the fuel cutoff inertial running in the downhill section according to the present invention is a method for obtaining the optimum fuel consumption.
11 is a table showing a calculation result according to the simulation of FIG.
12 is a graph showing a calculation result according to the simulation of FIG.
FIG. 13 is a table showing another calculation result according to the simulation of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.

The big data collection and analysis system 10 using the vehicle and road condition monitoring of the present invention includes a mobile communication terminal 100, a vehicle condition monitoring apparatus 200 and a safe driving guidance server 300, as shown in FIG. .

The vehicle condition monitoring device 200 used in the present invention is connected to a vehicle diagnostic device (OBD) 400 built in a vehicle by wire or wireless communication and is connected to the mobile communication terminal 100 by Bluetooth communication . Typically, the vehicle condition monitoring apparatus 200 has an interface for connection with the vehicle OBD 400 and a Bluetooth module for Bluetooth communication with the mobile communication terminal. Also, the vehicle condition monitoring apparatus 200 carries out a task of transmitting data on the vehicle condition received through the vehicle OBD 400 to the mobile communication terminal, and includes a control unit and a memory unit.

The mobile communication terminal 100 used in the present invention supports Bluetooth communication, has a GPS receiver and a vibration sensor, and can be preferably a smart phone. The mobile communication terminal 100 receives data on the vehicle condition from the vehicle condition monitoring device 200 and transmits the data to the guide server 300. The mobile communication terminal 100 also generates data on the vehicle condition itself by using the GPS receiver and the vibration sensor, and transmits the data to the guide server 300 in the same manner. Information about the position of the vehicle is generated by the GPS receiver, and data about the vibration level and the vibration pattern of the vehicle are generated by the vibration sensor. Here, the vibration level of the vehicle represents the amplitude of the vibration of the vehicle at a certain time, and the vibration pattern represents the change in the vibration amplitude and the set of vibration amplitude appearing in a certain time range.

In the present invention, the safe driving guidance server 300 transmits data on the vehicle condition collected by the vehicle condition monitoring device 200 and data on the position and vibration of the vehicle generated by the mobile communication terminal 100, (100) and stores it in its own database. The guidance server 300 evaluates the road condition from the data on the vehicle condition thus received and also provides the mobile communication terminal 100 with instructions on the safe driving based on the received vehicle condition data and the evaluated road condition Thereby informing the driver of the safe driving.

Specifically, in the present invention, the safe driving guidance server 300 evaluates the vibration level or the vibration pattern according to the position and the speed of the vehicle, evaluates the road condition at the corresponding position as safety or danger, The mobile communication terminal of the vehicle is notified that the speed of the vehicle is reduced to a speed lower than the speed at which the road condition becomes safe. Even if a vehicle is not traveling at a dangerous speed, the safe driving guidance server 300 can transmit a safety speed that can safely operate in such a road state to a mobile communication terminal And the like. A road condition with a hazard can be any one of a porthole, a protruding jaw, a rough road, a slippery road and a curved road.

Now, with reference to Fig. 2, the guide server 300 will explain in more detail how to evaluate road conditions from data on vehicle condition and how to guide safe driving.

The guide server 300 first receives data on the vehicle status from the mobile communication terminal 100 and stores the data in its own database (step S100). The data relating to the vehicle condition used in the present invention may be the speed, the position, the vibration level, the vibration pattern, the speed change or acceleration of the vehicle, whether the brake is operated, whether the accelerator pedal is operated, Such data is not collected only for one vehicle but is collected from a large number of vehicles traveling on various roads.

The vehicle condition monitoring apparatus 200 and the mobile communication terminal 100 collect and generate data relating to the vehicle condition continuously in real time, but transmitting the same to the guide server 300 at the same time intervals is performed by the guide server 300 and the communication Since the mobile communication terminal 100 is burdened with a considerable burden on the network, the mobile communication terminal 100 generally transmits the data to the mobile communication terminal 100 at a longer time interval than the time interval at which the vehicle condition monitoring apparatus 200 collects data and the time interval at which the mobile communication terminal 100 generates data. It is preferable to transmit such data to the guide server 300. [ For example, the mobile communication terminal 100 may transmit data regarding the vehicle status to the guide server 300 at intervals of 3 seconds, 1 second, or 0.1 intervals.

For data on the vehicle condition collected from a large number of vehicles, the guidance server 300 determines whether the vibration level of each vehicle is greater than the threshold value (step S110). At this time, the conditions such as the speed of each vehicle will vary greatly. If the vibration level of a vehicle is greater than the threshold, it can generally be estimated that the road condition is not suitable for driving at that speed.

Road conditions may include, for example, road conditions such as normal roads or normal roads, potholes, protruding jaws including speeding bumps, rough roads including unpaved roads, wet roads, Slippery roads, and curved roads. Among them, portholes, protruding jaws, rough roads, slippery roads, and curved roads are road conditions that are potentially dangerous to safe driving. On roads with these hazards, high vehicle speeds can lead to accidents, and vehicle speed must be reduced accordingly.

In general, a driver may drive while adjusting the speed according to his / her driving experience. However, even a very experienced driver may cause a mistake. A novice driver or a less skilled driver may misjudge the road state ahead This can lead to dangerous situations. Therefore, in the road condition with the above-mentioned risk factors, it is often necessary to travel at a speed much lower than the limit speed, otherwise it may lead to a traffic accident or vehicle breakage.

If the vibration level of a certain vehicle is greater than the threshold value in step S110, the guidance server 300 determines that the road condition of the vehicle is dangerous for the speed of the vehicle, and informs the driver of the following vehicle of the fact So that the driver can prevent such a danger. Therefore, the present invention aims at safe driving by notifying trailing vehicles of the road conditions according to the speed after evaluating the road conditions from the vehicle condition for the preceding vehicles.

2, if the vibration level of a certain vehicle is smaller than the threshold value, the guide server can not grasp the risk factor related to the road condition. Therefore, the guide server returns to step S100 to continuously receive data on the vehicle condition and store do.

On the other hand, as mentioned above, if the vibration level of a certain vehicle is greater than or equal to the threshold, it means that the road condition at the position where the vehicle is located is dangerous to the speed of the vehicle, The vibration pattern is analyzed to evaluate which event type the road state corresponds to (step S120). Here, the type of the event of the road state means that the road state has a dangerous factor and corresponds to a port hole, a protruding jaw, a rough road, a slippery road, or a curved road.

The vibration pattern means a set of vibration amplitudes appearing for a predetermined time range before and after the reference time with reference to a time having a vibration level exceeding a threshold value. Examination of such a vibration pattern makes it possible to grasp whether the road state corresponds to a port hole, a protruding jaw, a rough road, a slippery road or a curved road.

For this purpose, it is possible to prepare a reference vibration pattern by experimenting how the vibration pattern according to each road state appears according to the speed of the vehicle in advance. Experiments to prepare a reference vibration pattern may be performed several times for various portholes, protruding jaws, rough roads, slippery roads and curved roads, thereby enhancing the reliability of the reference vibration pattern.

As a result, it is possible to evaluate the event type of the road state by comparing the vibration pattern of the vehicle received from a certain vehicle with the reference vibration pattern. In evaluating the event kind of the road state, the acceleration of the vehicle, that is, the speed change, the operation of the brake pedal, and the like may be analyzed together to evaluate more accurately.

For example, in an experiment to determine a reference vibration pattern for a porthole, it is necessary not only to measure the vibration pattern that appears when passing through various portholes at a constant speed for various speeds, It is also desirable to measure the vibration pattern in the circumstance of passing through the port hole while reducing. In comparison with the reference vibration pattern thus measured, it is preferable to compare whether the brake pedal is depressed before the peak of the vibration pattern or whether the vehicle speed is decelerated, in addition to comparing the vibration pattern with the reference vibration pattern. That is, it is first determined whether or not the brake pedal is depressed before the peak value of the vibration pattern. If the brake pedal is depressed, the brake pedal is compared with the reference vibration pattern that appears when the brake pedal is depressed. If the brake pedal is not depressed before the peak value of the vibration pattern, This is compared with the reference vibration pad that appears when

If the event type of the road state having the risk factor is evaluated, the guide server 300 stores the type of the event, the location and the speed of the vehicle in its own database (step S130).

Then, the guide server 300 notifies the vehicle of the type of the event and the safe speed for the position before entering the corresponding position (step S140). Notifying the vehicle here means notifying the mobile communication terminal 100 in the vehicle that the driver of the vehicle can recognize it. In the present invention, the safe speed for a road condition with a risk factor, that is, an event, is lower than a lowest speed (hereinafter, referred to as 'lowest risk speed' For example, at a rate corresponding to 90% of the lowest risk rate. Of course, such safety speeds may be more precisely set according to more precise experiments and accumulation of application experience of the present invention.

For example, when it is judged that there is a porthole on a road ahead of a certain vehicle, the guidance server 300 may say "There is an obstacle estimated as a port hole ahead. Please note "to the mobile communication terminal 100 of the corresponding vehicle. In addition, when the road ahead is curved with respect to a certain vehicle, the guide server 300 transmits information such as "Please drive at a speed of 80 km / h or less" 100).

Next, if there is a request for program termination (step S150), the guide server 300 ends the procedure, and if not, returns to step S100 and continues the procedure.

Although not shown in the figure, the safe driving guide procedure according to the present invention described above may include an update of the database of the guide server 300 and a new judgment. Road conditions generally deteriorate, but they are often improved by road construction management. In other words, even if a porthole is located at a certain point in time, and the porthole position, for example, is evaluated as a safe speed of 30 km / h, if the porthole is later repaired by the road construction work, If the vibration pattern corresponding to the event of the porthole can not be found in the vehicles traveling at a speed higher than the critical velocity of 33 km / h, the guidance server 300 evaluates that the porthole at the position is disappeared and updates its database .

The same applies to protruding jaws, rough roads, and slippery roads. If the road is slippery with sand sprayed on the road, this condition can be improved quickly and not lasting for long. Even in the winter, the freezing section is frozen in the morning, and in the afternoon, the freezing disappears and the freezing is improved naturally. The present invention is to notify drivers of such an improvement prior to such an improvement, and to guide the driver along the normal road after the improvement. Therefore, the present invention is very useful because the road condition according to the position and the speed of the vehicle is almost immediately reflected.

On the other hand, it is not uncommon for curved roads to change the degree of inclination and curvature of roads when roads are completed, but sometimes the degree of curvature of roads is changed by new road works. In this case, the present invention immediately performs the evaluation of the road condition, thereby providing useful information to the driver.

Next, the big data collection and analysis system of the present invention may be to guide the fuel economy improvement operation as described below in addition to or in addition to the above-described safe driving function. That is, the big data collection and analysis system of the present invention notifies the driver of the fuel cutoff inertial travel when the vehicle is traveling on the downhill section to the inclination, thereby allowing the driver to perform the fuel cut inertial travel, . ≪ / RTI >

Specifically, in the big data collection and analysis system 10 of the present invention, the safe driving server 300 is configured to send a notification to the driver to start fuel cut inertial travel when the vehicle enters the downhill section, ), Calculates a rebuilding start speed at which the vehicle must start decelerating by decelerating the fuel cut inertia running at a downhill section, and when the vehicle reaches such rebuilding start speed in the downhill section, And notifies the mobile communication terminal 100 to issue a notification to start the re-acceleration.

The safe operation server 300 and the mobile communication terminal 100 store application programs and data necessary for such processing in their memory units and also store data generated by their own processing.

The driver's settings are transmitted to the safe operation server 300 by the mobile communication terminal 100 or the vehicle condition monitoring apparatus 200, for example, and stored in the database. In the present invention, in order for the safe driving server 300 to calculate the re-start speed in the downward section, the running resistance F of the vehicle must be calculated first. The running resistance F of the vehicle can be calculated by knowing data on the speed of the vehicle, the weight of the vehicle, i.e., the vehicle weight W, the road gradient of the downhill section, the engine speed, have. Accordingly, the driver inputs the type of the vehicle he owns, thereby enabling the safe driving server 300 to know the data on the vehicle and various resistance coefficients of such vehicle. At this time, the safe driving server 300 must store various data according to the type of the vehicle in its own database.

Meanwhile, in the big data collection and analysis system 10 of the present invention, the safe driving server 300 can know road inclination by storing map information about the road.

3 to 5, a procedure for performing the fuel economy improvement operation by the safe driving server 300 in the big data collection and analysis system 10 of the present invention will be described.

As shown in the figure, the server 300 first determines whether the vehicle is at the starting point of a downhill section (step S100). If the vehicle has not reached the downhill section, the server 300 continuously determines the situation until the vehicle enters the downhill section without performing any special operation.

If the vehicle has entered the starting point of the downhill section, the server 300 instructs the mobile communication terminal 100 to issue a notification to the user to start the fuel cut inertial travel (step S110). Then, the mobile communication terminal 100 notifies the user to start the fuel cut inertial travel according to the instruction of the server 300. [ This notification may be made by either or both visual and auditory methods.

Next, the server 300 calculates the running resistance (F) for the reference speed (V ₁₎ of the vehicle (step S120). Here, the reference speed V ₁ of the vehicle can be set by two methods.

First, as shown in Figure 6, the reference velocity (V ₁₎ of the vehicle can be set to the vehicle speed at the starting point of the driver is starting the fuel cut inertia driving. The server 300 notifies the driver to perform the fuel cutoff inertial run at the start point of the downhill section but the driver starts the fuel cutoff inertial run at the point where he or she has entered the start point of the downhill section by his / It is possible. Therefore, until the vehicle enters the starting point of the downhill section and then travels on the downhill section, the driver depresses the accelerator pedal to engage the fuel shutoff inertia, the vehicle is accelerated, constant speed or decelerated depending on the extent to which the driver depresses the accelerator pedal It can be decelerated.

In this case, the server 300 determines whether or not the vehicle has started the fuel cutoff inertial running (step S111). Whether or not the vehicle has started the fuel cutoff inertial travel can be judged based on whether fuel injection or the accelerator pedal is depressed and the engine speed and speed of the vehicle. Such data regarding the vehicle condition can be obtained from the vehicle condition monitoring apparatus 200 as mentioned above.

If the vehicle is started the fuel cut inertia running in the downhill section, the server 300 sets the vehicle speed at the fuel-cut inertia traveling start point to the reference speed (V ₁₎ (step S113), such a vehicle reference speed (V ₁ (Step S120).

On the other hand, if the vehicle has not started the fuel cutoff inertial run in the downhill section, the server 300 continuously checks whether the vehicle has started the fuel cutoff inertial run in the downhill section.

Second, the reference velocity (V ₁₎ of the vehicle as shown in FIG. 7 may be set to a vehicle speed in the speed, that is, the start of the downhill section at the time the vehicle is hayeoteul film enters the start of the downhill section . In this case, the driver considers that the fuel cutoff inertial run has started immediately at the start point of the downhill section according to the notification of the start of the fuel cut inertial run.

In this case, the server 300 includes a vehicle is set to the vehicle speed in a straight fuel cut without determining whether or not the inertia traveling start point whether actually start the fuel cut inertia running at the reference speed (V ₁₎ (step S111), such The running resistance F against the vehicle reference speed V ₁ is calculated (step S120).

Returning back to Fig. 3 and continuing with the explanation, the running resistance F is calculated by the following equation.

Driving resistance (F) = rolling friction resistance + air resistance - gradient resistance + internal resistance ... ... ... ... ... (1-1)

In the equation (1-1), the rolling resistance of the tire represents the rolling resistance between the tire and the road surface. The air resistance shows the resistance by the air. The gradient resistance is the resistance by the road gradient. And the like. Therefore, the gradient resistance is negative (-) in contrast to other resistances in the downward section. The internal resistance is proportional to the number of revolutions of the engine due to the resistance due to the friction loss of various types of gears and type (air conditioner, generator, coolant pump, etc.) connected to the tire and the engine. These resistances are calculated by the following equations.

Rolling friction resistance = Rolling resistance coefficient x Car weight x Gravity acceleration ... ... ... ... ... (1-2)

Air resistance = air resistance coefficient x speed ² ... ... ... ... ... (1-3)

Gradient Resistance = Vehicle Weight x Gravity Acceleration x sin θ ... ... ... ... ... (1-4)

(Where, &thetas; is the inclination angle of the downward section)

Internal resistance = Internal resistance factor x Engine speed ... ... ... ... ... (1-5)

(Where the various coefficients in the above equations are determined from measurements taken from vehicle experiments)

Next, the server 300 temporarily stops the fuel shutdown inertial travel in the downhill section and temporarily sets a re-start speed V ₂ to start re-acceleration (step S130). At this time, when the material is in the starting velocity (V ₂₎ to temporarily set to the difference between large and the final material is in the starting velocity (V ₂₎ for deciding a is so large that the number of repeating the procedure described below, as much as possible and finally confirmed by Is set to be close to the re-acceleration start speed (V ₂ ). For this purpose, the big data collection and analysis system of the present invention can confirm the relation between the slope and the length of the downhill road and the reacceleration start speed (V ₂ ) with respect to the vehicle speed through sufficient experiment beforehand. With such a relation, in starting material that temporarily set to a speed (V ₂₎ will be able to be set closer to the ultimate starting materials are confirmed in the speed (V _2).

Next, the server 300 is the degree to which the vehicle reference speed (V ₁₎ of the vehicle by the running resistance (F) calculated on when starting the fuel cut inertia running speed is reduced in the downhill section, that deceleration ( a _{fuel cut} ) is calculated by the following equation (1) (step S140).

Running resistance (F) = chajung (W) x deceleration (a _{pew eolkeot)} ... ... ... ... ... (One)

Then, the server 300 calculates the velocity V profile of the vehicle by the following equation (2) until the velocity V of the vehicle during fuel shutoff inertia travel becomes the re-acceleration start velocity V ₂ ( Step S150). Here, the vehicle is subjected to the fuel cut-off inertia traveling from the reference speed (V ₁ ) to the re-acceleration start speed (V ₂ ).

V = V ₁ - Σ (a _{pew eolkeot} x Δt) ... ... ... ... ... (2)

Next, the server 300 the vehicle is the fuser eolkeot total distance (s _{Pew eolkeot)} traveled during the fuel-cut traveling inertia calculated by the following formula (3) (step S160).

s _{Fuel Cut} = Σ (V x Δt) _{Fuel Cut} ... ... ... ... ... (3)

Then the server 300 time (Δt jammed until the vehicle is a material in the starting velocity (V ₂₎ material speed by accelerating by (a _{material in)} the reference speed (V ₁₎ at then end the fuel cut inertia running and it calculates the _{ash in)} by the following formula (4) (step S170). Here, the ash reacceleration rate (a _{reacceleration} ) is previously set and stored in the memory unit 200 as a constant. The ash rate (a _{reacceleration} ) can be set to, for example, 0.5 m / s ² .

V ₁ - V ₂ = a _ashes x t _ashes ... ... ... ... (4)

Next, the server 300 _(in s _material), a traveling material in a total running distance until the reference speed (V ₁₎ to the vehicle is accelerated to the material speed (a _{material in)} after fuel cut inertia driving end, and then (5) (step S180).

s _{re-acceleration} = V _{re-acceleration average velocity} x Δt _{Re-acceleration} ... ... ... ... ... (5)

(Wherein, V _{material in an average rate = (V 1 + V 2)} / 2 Im)

Then, the server 300 calculates the distance from the start point of the downhill section to the end point of the downhill section, that is, the length s of the downhill section (in the case of the embodiment shown in FIG. 7) to the distance to the end points for the downhill section (s) at the point (if the embodiment shown in FIG. 6) compared to the sum of the fuser eolkeot total distance (s _{Pew eolkeot)} and the total distance in material (s _{material inside)} And determines whether or not they match (step S190). Here, the distance s from the start point of the downward section to the end point of the downward section is set to the length of the downward section in the map information stored in the server 300. The distance s from the start point of the fuel cutoff inertia travel to the end point of the downhill section of the downhill section is calculated from the length of the downhill section in the map information stored in the server 300, The distance to the starting point position is subtracted. Since the server 300 receives the position of the vehicle from the mobile terminal in real time, the server 300 can notify the driver of the start of the fuel cutoff inertial travel when the vehicle enters the starting point of the downhill section, It is possible to calculate the distance (s) from the running start point to the end point of the downhill section.

The distance s from the start point of the downhill section to the end point of the downhill section, that is, the length s of the downhill section (in the embodiment shown in FIG. 7) or the end point of the downhill section from the fuel cut inertial running start point of the downhill section the distance (s) (if the embodiment shown in FIG. 6) the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the case that matches the sum of the total distance (s _{material inside),} the material is a temporarily set into The start speed V ₂ is set to be definite (step S200).

Then, the server 300 determines whether the vehicle speed V has reached the re-acceleration start speed V ₂ (step S210), and in such a case, notifies the mobile communication terminal 100 of a notification (Step S220). Then, the mobile communication terminal 100 terminates the procedure in one downhill section by issuing a notification to the driver to notify the start of re-start according to such an instruction of the server 100. [

On the other hand, the distance from the start point of the downward section to the end point of the downward section, that is, the length s of the downward section (in the embodiment shown in FIG. 7) or the end of the downward section distance (s) to the point (in the case of the embodiments shown in FIG. 6) is greater than the sum of the fuser eolkeot total distance (s _{Pew eolkeot)} and the total distance in material (s _{ashes in)} (step S230), temporarily by reducing a starting material in the speed (V ₂₎ set after reset (step S240) the procedure goes back to step S130 and repeats the above process.

On the other hand, when the distance from the start point of the downhill section to the end point of the downhill section, that is, the length (s) of the downhill section (in the embodiment shown in FIG. 7) or the downhill section distance (s) to the end point (if the embodiment shown in FIG. 6) is smaller than the sum of the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total running distance (s _{ashes in)} (step S230), The temporary re-acceleration start speed V ₂ is reduced and set again (step S260), and the procedure returns to step S130 and repeats the above process.

Degree of reduction or increase in the degree to temporarily reset to the speed start velocity (V ₂₎ material in the length (s) or a distance (s) and Pugh eolkeot total distance (s _{Pew eolkeot)} and the total distance in ash ( s _{reacceleration} ), it is possible to reduce the number of repetitions.

Experiments and simulations as shown in FIGS. 8 to 13 have been performed in order to show that the method according to the present invention realizes the optimum fuel consumption in the downward section.

First, in the case where the fuel cutoff inertial travel is not used in the downhill section of the similar road and driving condition, and when the rearward running after the fuel cutoff inertial travel according to the present invention is performed, the fuel cost is about The difference of 3 to 4 times was confirmed by FIGS. 8 and 9.

Referring to FIG. 8, the fuel consumption was 15.2 km / L when the travel distance was 800 m at an average speed of 69.7 km / h in a downhill section having an inclination of 0.72 degrees, while the fuel consumption was 15.2 km / The average mileage was 66.7 km / h, and the mileage was 800 km, the fuel consumption was 51.6 km / L when the vehicle was driven in the manner of the fuel cutoff inertia according to the present invention.

Next, as shown in FIG. 10, a downhill section having an inclination of 20 km, 40 m, and 60 m in height with a horizontal distance of 2 km and running 1 km before the downhill section at 110 km / Simulation of the situation that the original reference speed is returned to 110 km / h with the acceleration of 0.5 m / s ² at 95 km / h, 90 km / h and 85 km / h, Was set and calculated using the fuel consumption simulation software CRUISE program.

Referring to FIGS. 11 and 12, when the vehicle is restored at speeds of 100 km / h, 95 km / h, 90 km / h and 85 km / h at a road gradient of 10 m / km and 20 m / km, The distance (the distance required to reach the original reference speed of 110 km / h) was shorter than that of the downhill section, and the longer the fuel cutoff inertia distance was, the better the fuel economy was. Here, the road gradient is expressed as height / horizontal distance. On the other hand, in the case of re-acceleration at a speed of 100 km / h at a road gradient of 30 m / km, the sum of the fuel cutoff inertia travel distance and the rebound distance is shorter than that of the downhill section. However, The sum of the inertia travel distance and the ash travel distance was slightly longer than the distance of the downhill section, and the sum of the fuel blocking inertia travel distance and the ash travel distance was longer than the downhill section distance when the vehicle was rebounding at 90 km / h and 85 km / h . As a result, the best fuel economy was obtained when the vehicle was rebounding at a speed of 95 km / h. In Fig. 11, the fuel consumption amount is the fuel consumption amount in the entire driving range, and the fuel consumption is the fuel consumption with respect to the sum of the fuel blocking inertia traveling distance and the ashing distance.

More sophisticated simulation results are shown in Fig. Referring to FIG. 13, when the road is decelerated at a speed of 68.6 km / h in a downward section of 10 m / km, and when the engine speed is reduced at a speed of 82 km / h in a downward section of a road gradient of 20 m / And the recirculation distance becomes equal to the distance of the downward section, and the fuel economy becomes highest at 26.4km / L and 42.1km / L, respectively.

On the other hand, if the vehicle is re-accelerating at a speed of 95.3 km / h in a downhill section of a road gradient of 30 m / km, the sum of the fuel-blocking inertia travel distance and the rebound distance becomes equal to the distance of the downhill section, It becomes the best. If the fuel cutoff inertia travels further and starts to accelerate at a speed of 95 km / h, the sum of the fuel cutoff inertia travel distance and the recoil distance becomes greater than the downhill distance. This means that when the original speed is 110 km / h, it is in the flat section after the end point of the downward section. It can be seen from FIG. 13 that the fuel consumption is 68.1 km / L, which is less than the optimum fuel consumption (75.5 km / L) when the speed of starting the re-acceleration is 95 km / h.

Next, in the big data collection and analysis system of the present invention, the safe driving guidance server may provide guidance to the mobile communication terminal of the vehicle other than the consumable replacement period about the replacement of consumables. For example, if the vehicle has run 10,000 km to the vehicle after the engine oil has been exchanged, it can be instructed to change the engine oil again. 40,000 km for spark plugs, 100,000 km for timing belts, and then guiding the replacement of consumables.

In the big data collection and analysis system of the present invention, the safe driving guidance server may also provide guidance regarding the failure or abnormal state of the vehicle diagnosed by a vehicle diagnostic device (OBD) embedded in the vehicle. For example, when the oil hydraulic pressure is low under normal driving conditions, a notification to supplement the engine oil may be notified. Further, when the coolant temperature is high in the normal running condition, it is possible to notify that the coolant is replenished, and when the battery voltage is low under the normal running condition, notification of battery replacement or generator check can be notified. In addition to this, you can be notified of the inspection / replacement of various parts corresponding to the diagnostic codes given by the car diagnostics (OBD) embedded in the vehicle.

Therefore, the big data collection and analysis system of the present invention allows the driver to conveniently perform vehicle management.

In addition, in the big data collection and analysis system of the present invention, the safe driving guidance server is a maintenance / repair server for repairing troubles or abnormality of consumables or vehicles to be exchanged to a vehicle manufacturer, a sales company or a vehicle maintenance company computer by wire or wireless communication It may be to notify the contents.

The vehicle manufacturer or sales person supplies the parts of the vehicle. If the supply of the parts of the vehicle is not smooth, the operation of the vehicle may be stopped in severe cases. On the other hand, a vehicle manufacturer or a salesman wants to keep inventory as low as possible because the efficiency of the vehicle becomes low if the vehicle has too much inventory.

Therefore, the big data collection and analysis system of the present invention collects information about the vehicle condition from the vehicle and provides the collected information to the vehicle manufacturer or the salesman so that the vehicle manufacturer or the sales company can smoothly supply the vehicle parts without having much stock of the vehicle parts .

Also, if the vehicle manufacturer or dealer provides the driver with information about the vehicle management by means of the big data collection and analysis system of the present invention, this will provide the driver with convenience in managing the vehicle, It will strengthen customer management activities to sell its vehicles. According to these activities, the driver is more likely to repurchase the vehicle of the vehicle manufacturer.

10: Big data collection and analysis system 100: Mobile communication terminal
200: Vehicle condition monitoring device 300: Safety driving guidance server
400: Vehicle OBD

Claims (8)

A mobile communication terminal that supports Bluetooth communication and also has a GPS receiver and a vibration sensor, a vehicle that is connected to a vehicle diagnostic device (OBD) built in a vehicle by wire or wireless communication and is connected to the mobile communication terminal by Bluetooth communication Data related to the vehicle condition collected by the vehicle condition monitoring device and data regarding the position and vibration of the vehicle generated by the mobile communication terminal are received from the mobile communication terminal and stored in its own database And a safe driving guidance server for evaluating the road condition from the data on the received vehicle condition and for guiding the safe driving based on the data on the received vehicle condition and the evaluated road condition,
The safe driving guidance server evaluates the vibration level or the vibration pattern according to the position and the speed of the vehicle, evaluates the road condition at the corresponding position as safety or danger, and when a vehicle is traveling at a dangerous speed, And notifies the mobile communication terminal of the vehicle that the speed of the vehicle is lower than the speed at which the road condition becomes safe. The method according to claim 1,
The safe driving guidance server evaluates the road condition of the corresponding position from any one of the normal road, the porthole, the protruding jaw, the rough road, the slippery road and the curved road from the vibration pattern corresponding to the position and the speed of the vehicle, Wherein the vehicle monitoring system comprises: a vehicle monitoring unit for monitoring the vehicle condition; 3. The method of claim 2,
The safe driving guidance server may be configured to have any one of a road state having a dangerous element in front of the vehicle, that is, a porthole, a protruding jaw, a rough road, a slippery road, and a curved road, even if a vehicle is not traveling at a dangerous speed And notifies the mobile communication terminal of a safe speed at which the vehicle can safely operate in such a road condition. 4. The method according to any one of claims 1 to 3,
Wherein the content of the notification regarding the safe driving is evaluated on the basis of data received from other vehicles preceding the vehicle receiving the notification about the corresponding position. And analysis system. 5. The method according to any one of claims 1 to 4,
The safe driving guide server notifying the mobile communication terminal of a fuel cutoff inertial travel when the vehicle is traveling on a downhill section with an inclination;
Calculating a running resistance (F) for the vehicle speed (V ₁ ), that is, the reference speed (V ₁ ), at the start point of the downhill section or at the fuel cutoff inertial running start point;
Temporarily setting a recirculation start speed (V ₂ ) at which the fuel shutdown inertial travel is stopped and the re-acceleration is started in the downward section;
Running resistance (F) = chajung (W) x deceleration (a _{pew eolkeot)} ... ... ... ... ... (One)
Calculating a deceleration (a _{fuel cut} ) according to the above formula (1);
V = V ₁ - Σ (a _{pew eolkeot} x Δt) ... ... ... ... ... (2)
Calculating a velocity (V) profile of the vehicle during fuel cut inertia traveling until V = V _{2 according} to equation (2);
s _{Fuel Cut} = Σ (V x Δt) _{Fuel Cut} ... ... ... ... ... (3)
Calculating the expression (3) Pugh eolkeot total distance (s _{Pew eolkeot)} traveled while the vehicle is in the fuel cut traveling by inertia;
V ₁ - V ₂ = a _ashes x t _ashes ... ... ... ... (4)
(4), the time taken until the vehicle accelerates to a reference speed (V ₁ ) accelerated to a preset reference speed (a _{rest speed} ), which is a preset constant in the memory, after the vehicle ends the fuel cutoff inertial running Δt _{re-acceleration} );
s _{re-acceleration} = V _{re-acceleration average velocity} x Δt _{Re-acceleration} ... ... ... ... ... (5)
(Wherein, V _{material in an average rate = (V 1 + V 2)} / 2 Im)
To, after the vehicle fuel cut inertia driving end ash rate (a _{material in)} in a driving material into a total travel until the acceleration and the reference velocity (V _1), the distance (s _{material inside)} by the formula (5) Calculating;
(S) from the start point of the downhill section to the end point of the downhill section, that is, the length (s) of the downhill section or the distance s from the fuel cut off inertial running start point to the end point of the downhill section, the step of determining whether the fuser eolkeot match compared to the sum of the total distance (s _{Pew eolkeot)} and the material in the total running distance (s _{material inside);}
The length (s) or a distance (s) is the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total running distance are consistent with the sum of (s _{material inside),} beginning in the material is set to the tentative speed (V ₂ );
The length (s) or a distance (s) is the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total running distance is greater than the sum of (s _{material inside),} a material in a starting velocity is set to the temporary ( V ₂ ), and repeating the above-described steps.
The length (s) or a distance (s) is the fuser eolkeot total distance (s _{Pew eolkeot)} and the material in the total distance is less than the sum of (s _{material inside),} a material in a starting velocity is set to the temporary ( V ₂ ), and repeating the above steps. And
When the vehicle is in the fuel cut-off inertia running in the downhill section, when the speed of the vehicle reaches the definite set recoat start speed (V ₂ ) in the downhill section, And notifying the mobile communication terminal of the large data collection and analysis system using the vehicle and road condition monitoring. 6. The method of claim 5,
Driving resistance (F) = rolling friction resistance + air resistance - gradient resistance + internal resistance ... ... ... ... ... (1-1)
Rolling friction resistance = Rolling resistance coefficient x Car weight x Gravity acceleration ... ... ... ... ... (1-2)
Air resistance = air resistance coefficient x speed ² ... ... ... ... ... (1-3)
Gradient Resistance = Vehicle Weight x Gravity Acceleration x sin θ ... ... ... ... ... (1-4)
(Where, &thetas; is the inclination angle of the downward section)
Internal resistance = Internal resistance factor x Engine speed ... ... ... ... ... (1-5)
(Where the various coefficients in the above equations are determined from measurements taken from vehicle experiments)
Wherein the running resistance (F) is calculated by the equations in the downward section. 7. The method according to any one of claims 1 to 6,
The safe driving guidance server may provide guidance to the mobile communication terminal of the vehicle different from the consumable product replacement period for replacement of the consumable item, or may be a failure of the vehicle diagnosed by the vehicle diagnostic device (OBD) And provides a guidance on the abnormal condition. 8. The method of claim 7,
Wherein the safe driving guide server notifies the contents of the expendable item to be exchanged to the vehicle manufacturer or the seller or the vehicle maintenance company computer through wired or wireless communication, And big data collection and analysis system using road condition monitoring.

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