Automatically-controlled vehicle diversion system and control method thereof

Abstract

The invention relates to an automatic control vehicle flow guide system and a control method thereof, and belongs to the technical field of vehicle direction whole vehicle application, and the automatic control vehicle flow guide system comprises a flow guide plate assembly, a driving assembly, a sensing assembly and a control module; one end of the guide plate assembly is fixedly connected to the top of the cab, and the other end movably abuts against the top of the carriage; one end of the driving assembly is mounted at the top of the cab, and the other end of the driving assembly provides driving force for driving the guide plate assembly to movably abut against the top of the carriage; the sensing assembly is used for collecting distance information between the guide plate assembly and a vehicle compartment; the control module is used for adjusting the driving force of the driving assembly according to the distance information collected by the sensing assembly. The technical problems that in the prior art, limiting of a fixed air guide cover cannot be adjusted, an adjustable air guide cover is of a rack screw digging limiting structure, and when trailer containers with different heights are matched, personnel need to park the air guide cover, and the air guide cover reaches the top of a cab with the help of special tools for manual adjustment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile steering whole vehicle application, and in particular to an automatically controlled vehicle flow diversion system and a control method thereof. Background Art

[0002] In addition to the three major components that affect fuel economy, the reasonable reduction of driving wind resistance can effectively improve the fuel economy of the vehicle. Air resistance accounts for a large proportion of vehicle driving. When the vehicle speed reaches 50km / h, installing air guide components that match the height of the cargo box can effectively reduce the vehicle's wind resistance coefficient. According to aerodynamics, the gap between the cab and the trailer will affect the vehicle's wind resistance (such as Figure 1 ), turbulence is formed in the rear structure of the cab, that is, when the vehicle is driving, the windward airflow flows along the surface of the cab. At the rear end of the cab, due to the large curve, the airflow leaves the cab surface to form turbulence 1, generating resistance. Figure 2 As shown in the figure, the windward airflow flows along the surface of the cab during driving. At the rear end of the cab, due to the large curve, the airflow leaves the cab surface to form turbulence, generating air resistance, such as Figure 3 As shown in the figure, after the cargo compartment is connected, there is a gap between the cargo compartment and the rear of the cab as required by the design. The height of the cargo compartment is usually higher than the top of the vehicle. When the airflow passes through the top of the cab and then the gap between the trailer, it will form a spoiler resistance area downward, and the wind resistance of the vehicle will increase significantly. Therefore, it is necessary to install a deflector and spoilers on the top and left and right sides of the cab to make the airflow from the roof smoothly transition to the rear of the vehicle, avoid the formation of spoiler areas, and thus achieve resistance reduction.

[0003] According to aerodynamics, matching air guide components can effectively reduce resistance and fuel consumption. Existing air guide components are mainly divided into fixed and adjustable types. Both solutions are composed of a top guide plate and left and right spoiler structures. The left and right spoilers have only one limit. The top guide cover is: the fixed limit cannot be adjusted, and the adjustable type is a rack screw limit structure. When matching trailers of different heights, personnel need to stop the car and use special tools to reach the top of the cab for manual adjustment. Summary of the invention

[0004] In view of this, it is necessary to provide an automatically controlled vehicle deflector system and a control method thereof to solve the technical problems in the prior art that the fixed deflector limit cannot be adjusted, the adjustable type is a rack screw limit structure, and when matching trailer cargo boxes of different heights, personnel need to stop the car and use special tools to reach the top of the cab for manual adjustment.

[0005] In order to solve the above problems, the present invention provides an automatically controlled vehicle deflection system, comprising: a deflector assembly, a drive assembly, a sensor assembly and a control module; One end of the deflector assembly is fixedly connected to the top of the cab, and the other end is movably abutted against the top of the carriage; One end of the driving assembly is mounted on the top of the cab, and the other end provides a driving force for driving the deflector assembly to abut against the top of the car; The sensor assembly is used to collect distance information between the deflector assembly and the vehicle compartment; The control module is used to adjust the driving force of the driving component according to the distance information collected by the sensor component.

[0006] In one possible implementation, the deflector assembly includes a first deflector, a second deflector and a third deflector, the first deflector is installed on the top of the vehicle cab and extends toward the top of the vehicle compartment, the second deflector is installed on one side of the vehicle cab and extends toward the side of the vehicle compartment, and the third deflector is installed on the other side of the vehicle cab and extends toward the other side of the vehicle compartment.

[0007] In a possible implementation, the drive assembly includes a first drive member, a second drive member and a third drive member, the drive end of the first drive member is connected to the first guide plate, the drive end of the second drive member is connected to the second guide plate, and the drive end of the third drive member is connected to the third guide plate.

[0008] In a possible implementation, the first driving member, the second driving member, and the third driving member are all hydraulic cylinders.

[0009] In one possible implementation, the sensing assembly includes a first laser sensor and a first receiver, a second laser sensor and a receiver, and a third laser sensor and a receiver; the first laser sensor and the first receiver are installed on a first guide plate, the second laser sensor and the second receiver are installed on a second guide plate, and the third laser sensor and the third receiver are installed on a third guide plate.

[0010] In a possible implementation, the control module includes a receiving unit, a processing unit and a control unit; The receiving unit is used to receive the distance information between the deflector assembly and the vehicle compartment, and the extension displacement information of the hydraulic cylinder piston rod acquired by the sensor assembly, and send them to the processing unit; The processing unit is used to determine the driving force of the driving assembly according to the distance between the truck compartments and the extension displacement information of the piston rod, and send the driving force information to the control unit; The control unit is used to control the extension movement of the piston rod according to the driving force size information.

[0011] In a second aspect, the present invention further provides a control method for an automatically controlled vehicle diversion system, which is applied to any of the automatically controlled vehicle diversion systems described above, comprising: Obtain the round trip time of the laser transmitter of the sensor component periodically emitting the laser, and the real-time extension displacement information of the piston rod at the corresponding moment; Determine the distance between the deflector assembly and the truck compartment according to the round trip time of periodically emitting laser light and the laser speed; According to the jump relationship between the distance between the deflector assembly and the truck compartment and time, the target extension displacement information of the piston rod when the deflector assembly contacts the edge of the truck compartment is determined; Adjust the real-time extension displacement of the piston rod to the target extension displacement.

[0012] In some embodiments, the distance between the deflector assembly and the truck compartment is determined based on the round-trip time of the periodically emitted laser and the laser speed, and is determined by the following formula:

[0013] Where D is the distance between the deflector assembly and the truck compartment, C is the laser propagation speed of the laser sensor, The moment the receiver receives the reflected laser, The moment when the laser sensor emits laser.

[0014] In some embodiments, the step of determining the target extension displacement information of the piston rod when the deflector assembly contacts the edge of the truck compartment according to the jump relationship between the distance between the deflector assembly and the truck compartment and time includes: Performing a preset derivation process on the distance between the deflector assembly and the truck compartment to obtain a derivation result; Determine the time corresponding to the item with the largest value change in the derivative result; The extension displacement of the piston rod at the corresponding time is determined according to the time corresponding to the item with the largest value change, and the extension position at this time is determined as the target extension displacement information.

[0015] In some embodiments, the distance between the deflector assembly and the truck compartment is pre-derived and expressed by the following formula:

[0016] in, To obtain the derivative result, D is the distance between the deflector assembly and the truck compartment, and T is the time period of periodic laser emission.

[0017] The beneficial effects of the present invention are: by setting a driving component to drive the deflector assembly to achieve automatic adjustment, and by setting a sensor component to obtain the precise distance between the deflector assembly and the truck compartment, and then controlling the driving force of the driving component through the control module, the purpose of automatically and accurately adjusting the position of the deflector is achieved. In addition, by setting a deflector that can automatically adjust the opening and closing angle, the problem of frequently changing cargo boxes of different specifications and sizes during vehicle operation is solved, resulting in the inability to achieve the optimal wind resistance reduction effect.

[0018] Furthermore, the present application also obtains the round trip time of the laser emitter of the sensor assembly periodically emitting lasers, and the real-time extension displacement information of the piston rod at the corresponding moment; and determines the distance between the deflector assembly and the truck compartment according to the round trip time of the periodic laser emission and the laser speed; finally, according to the jump relationship between the distance and time between the deflector assembly and the truck compartment, determines the target extension displacement information of the piston rod when the deflector assembly contacts the edge of the truck compartment; and adjusts the real-time extension displacement of the piston rod to the target extension displacement. Accurate control is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the gap relationship between the cab and the trailer cargo box in the prior art related to the present invention; Figure 2 It is a schematic diagram of the turbulence resistance 1 formed behind the cab in the prior art related to the present invention; Figure 3 It is a schematic diagram of reducing wind resistance with a top air deflector in the prior art related to the present invention; Figure 4 A schematic structural diagram of an embodiment of an automatic controlled vehicle diversion system provided by the present invention; Figure 5 A schematic structural diagram of an embodiment of a flow guiding component assembly in the automatic controlled vehicle flow guiding system provided by the present invention; Figure 6 A structural diagram of an embodiment of a control module in the automatic controlled vehicle diversion system provided by the present invention; Figure 7 A flow chart of an embodiment of a control method of an automatically controlled vehicle flow diversion system provided by the present invention; Figure 8 In the control method of the automatically controlled vehicle diversion system provided by the present invention, the right side of the vehicle moves schematically.

[0020] Fig. 9 A schematic diagram of position correspondence in the control method of the automatic vehicle diversion system provided by the present invention; Fig.10 A schematic diagram of sending / receiving a deflector position signal in a control method of an automatically controlled vehicle deflector system provided by the present invention; Fig.11 A schematic diagram of the relationship between distance D and time T in the control method of the automatic vehicle diversion system provided by the present invention; Figure 4 Illustration: 1 - first laser sensor; 2 - first laser sensor receiver; 3 - second laser sensor; 4 - second laser sensor receiver; 5 - third laser sensor; 6 - third laser sensor receiver. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0022] A specific embodiment of the present invention discloses an automatically controlled vehicle diversion system, see Figure 4 , including: a guide plate assembly, a driving assembly, a sensor assembly and a control module; One end of the deflector assembly is fixedly connected to the top of the cab, and the other end is movably abutted against the top of the carriage; One end of the driving assembly is mounted on the top of the cab, and the other end provides a driving force for driving the deflector assembly to abut against the top of the car; The sensor assembly is used to collect distance information between the deflector assembly and the vehicle compartment; The control module is used to adjust the driving force of the driving component according to the distance information collected by the sensor component.

[0023] In this embodiment, the automatic adjustment is achieved by setting a driving component to drive the deflector component, and the precise distance between the deflector component and the truck compartment is obtained by setting a sensor component, and then the driving force of the driving component is controlled by the control module, so as to achieve the purpose of automatically and accurately adjusting the position of the deflector. In addition, by setting a deflector that can automatically adjust the opening and closing angle, the problem of frequently changing cargo boxes of different specifications and sizes during vehicle operation is solved, which leads to the inability to achieve the optimal wind resistance reduction effect.

[0024] It should be noted that there is no limit to the number of deflector assemblies, and they are usually combined with deflector assemblies with the best deflection effect in the industry. In a preferred embodiment, the deflector assembly includes a first deflector, a second deflector, and a third deflector, the first deflector is installed on the top of the vehicle cab and extends toward the top of the vehicle compartment, the second deflector is installed on one side of the vehicle cab and extends toward the side of the vehicle compartment, and the third deflector is installed on the other side of the vehicle cab and extends toward the other side of the vehicle compartment.

[0025] Specifically, the first deflector is installed on the top of the carriage, the second deflector is installed on the left side of the carriage, and the third deflector is installed on the right side of the carriage.

[0026] Furthermore, the guide structure is as follows Figure 5 The deflector structure is made of flexible material, and the deflector can be extended through the retractable structure to match cargo compartments of different sizes. At the same time, it can be freely folded / opened through the side folding bracket. The structure can withstand the resistance flow generated by different vehicle speeds.

[0027] It should be noted that the number of drive components and guide components is set one-to-one, and the drive form and drive structure of the drive component are not limited here. It can be understood that as long as it can be ensured that the drive component drives the corresponding guide member to move to the target position. Among them, the drive member can be a hydraulic cylinder, a cylinder or a motor, etc. In a preferred embodiment, the drive component includes a first drive member, a second drive member and a third drive member, the drive end of the first drive member is connected to the first guide plate, the drive end of the second drive member is connected to the second guide plate, and the drive end of the third drive member is connected to the third guide plate. Among them, the first drive member corresponds to the top guide plate, the second drive member corresponds to the left guide plate, and the third drive member corresponds to the right guide plate.

[0028] In a specific embodiment, the driving member is a hydraulic cylinder, and a displacement sensor is installed in each hydraulic cylinder to detect the extension distance of the piston rod of the corresponding cylinder. The power source of the driving cylinder comes from the truck chassis hydraulic device.

[0029] It should be noted that the number of sensor components and guide components is set in a one-to-one correspondence, and the type of sensor is determined according to the type of data to be acquired. In a specific embodiment, the sensor component includes a first laser sensor and a first receiver, a second laser sensor and a receiver, and a third laser sensor and a receiver; the first laser sensor and the first receiver are installed on the first guide plate, the second laser sensor and the second receiver are installed on the second guide plate, and the third laser sensor and the third receiver are installed on the third guide plate.

[0030] Specifically, a top laser sensor and a receiver are installed on the top edge of the deflector, and the receiver is used to receive the laser signal emitted by the top laser sensor; a left laser sensor and a receiver are installed on the outer edge of the left spoiler, and the receiver is used to receive the laser signal emitted by the left laser sensor; a right laser sensor and a receiver are installed on the outer edge of the right spoiler, and the receiver is used to receive the laser signal emitted by the right laser sensor.

[0031] In some embodiments, see Figure 6 , the control module includes a receiving unit, a processing unit and a control unit; The receiving unit is used to receive the distance information between the deflector assembly and the vehicle compartment, and the extension displacement information of the hydraulic cylinder piston rod acquired by the sensor assembly, and send them to the processing unit; The processing unit is used to determine the driving force of the driving assembly according to the distance between the truck compartments and the extension displacement information of the piston rod, and send the driving force information to the control unit; The control unit is used to control the extension movement of the piston rod according to the driving force size information.

[0032] In this embodiment, the control module is located inside the cab and is used to process the data of the sensors and output control signals to control the air deflector, the left spoiler and the right spoiler.

[0033] Specifically, when the tractor head is connected to the trailer cargo compartment, the opening / closing action is realized by executing the controller switch installed in the cab. The switch inputs high and low potential signals to the controller, which are then input into the three solenoid valves of the hydraulic cylinder, which can control the extension and retraction movement of the cylinder pistons of the first guide plate, the second guide plate and the third guide plate respectively.

[0034] Based on the above-mentioned control method of the vehicle diversion system which is automatically controlled, the embodiment of the present invention further provides a control method of the vehicle diversion system which is automatically controlled, please refer to Figure 7 ,include: S701, obtaining the round trip time of the laser emitter of the sensor component periodically emitting the laser, and the real-time extension displacement information of the piston rod at the corresponding moment; S702, determining the distance between the deflector assembly and the truck compartment according to the round trip time of the periodically emitted laser and the laser speed; S703, determining target extension displacement information of the piston rod when the deflector assembly contacts the edge of the truck compartment according to the jump relationship between the distance between the deflector assembly and the truck compartment and time; S704: Adjust the real-time extension displacement of the piston rod to the target extension displacement.

[0035] In this embodiment, the entire control scheme is divided into a detection phase, a processing phase and an output phase. The entire control scheme takes the air deflector control as an example, and the left spoiler and the left spoiler control logic are the same as the air deflector.

[0036] The process of the detection stage is: the deflector moves slowly from the original position to the limit position, such as Figure 8 As shown. In this process, at each unit time T, the distance between the top edge of the cargo box and the deflector is calculated, and the displacement distance of the deflector cylinder piston is calculated. The obtained distances and displacement distances are matched one by one in the order of the time axis. The process is as follows: Fig. 9 shown.

[0037] The principle of calculating the distance between the top edge of the cargo box and the fairing is as follows: At every interval of unit time T, the laser sensor at the top of the fairing sends a laser signal. Due to the obstruction of the cargo box, when the laser irradiates the end face of the cargo box, reflection will occur, and the reflected laser signal is received by the receiver of the top laser sensor. Record the current time t_receive equal to t0 (t0 < T); if there is no obstruction from the cargo box, the laser emitted by the laser sensor cannot form a reflection and be received by the laser sensor receiver, then set t_receive equal to T. Through the formula:

[0038] It is possible to measure the distance D between the laser sensor and the end face of the cargo box at every interval of unit time T. The process is as Fig.10 shown.

[0039] And obtain the displacement distance of the piston of the fairing oil cylinder.

[0040] The process in the processing stage is as follows: During the Figure 7 movement of the fairing, the relationship curve between the distance D and the time T can be obtained, as Fig.11 shown. Take the derivative of the distance D obtained in the detection stage, as shown in the formula:

[0041] For the subsequent carry out analysis. When the maximum jump value occurs, it is the edge of the upper end face of the cargo box. Because within the (N - 1)T, due to the obstruction of the cargo box, when the laser irradiates the end face of the cargo box, reflection will occur, and the reflected laser signal is received by the receiver of the top laser sensor. Record the current time t_receive equal to t0 (t0 < T); within the NT, there is no obstruction from the cargo box, the laser emitted by the laser sensor cannot form a reflection and be received by the laser sensor receiver, then set t_receive equal to T. And t0 is much smaller than T, so it can be known that at this time D has a continuous jump, and the jump point is the edge of the upper end face of the cargo box.

[0042] The process in the output stage is as follows: In the processing stage, when it is judged that the edge of the upper end face of the cargo box is detected at the NT moment, the corresponding (N)L value can be recorded through Fig. 9 the controller outputs a high - voltage signal to the solenoid valve of the fairing oil cylinder. The solenoid valve is energized and attracted to make the oil circuit conductive. The piston of the fairing oil cylinder moves, and the displacement sensor inside the fairing oil cylinder is used to detect the displacement distance of the piston in real - time. When the piston of the oil cylinder moves to L, the controller outputs a low - voltage signal to the solenoid valve of the fairing oil cylinder, and the solenoid valve loses power and closes, then the piston of the fairing oil cylinder keeps this position unchanged.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatically controlled vehicle diversion system, characterized in that: include: deflector assembly, drive assembly, sensor assembly and control module; One end of the deflector assembly is fixedly connected to the top of the cab, and the other end is movably abutted against the top of the carriage; One end of the driving assembly is mounted on the top of the cab, and the other end provides a driving force for driving the deflector assembly to abut against the top of the car; The sensor assembly is used to collect distance information between the deflector assembly and the vehicle compartment; The control module is used to adjust the driving force of the driving component according to the distance information collected by the sensor component.

2. The automatic controlled vehicle diversion system according to claim 1, characterized in that: The deflector assembly includes a first deflector, a second deflector and a third deflector. The first deflector is installed on the top of the vehicle cab and extends toward the top of the vehicle compartment. The second deflector is installed on one side of the vehicle cab and extends toward the side of the vehicle compartment. The third deflector is installed on the other side of the vehicle cab and extends toward the other side of the vehicle compartment.

3. The automatic controlled vehicle diversion system according to claim 2, characterized in that: The driving assembly includes a first driving member, a second driving member and a third driving member. The driving end of the first driving member is connected to the first guide plate, the driving end of the second driving member is connected to the second guide plate, and the driving end of the third driving member is connected to the third guide plate.

4. The automatic controlled vehicle diversion system according to claim 3, characterized in that: The first driving member, the second driving member and the third driving member are all hydraulic cylinders.

5. The automatic controlled vehicle diversion system according to claim 4, characterized in that: The sensing assembly includes a first laser sensor and a first receiver, a second laser sensor and a receiver, and a third laser sensor and a receiver; the first laser sensor and the first receiver are installed on the first guide plate, the second laser sensor and the second receiver are installed on the second guide plate, and the third laser sensor and the third receiver are installed on the third guide plate.

6. The automatic controlled vehicle diversion system according to claim 5, characterized in that: The control module includes a receiving unit, a processing unit and a control unit; The receiving unit is used to receive the distance information between the deflector assembly and the vehicle compartment, and the extension displacement information of the hydraulic cylinder piston rod acquired by the sensor assembly, and send them to the processing unit; The processing unit is used to determine the driving force of the driving assembly according to the distance between the truck compartments and the extension displacement information of the piston rod, and send the driving force information to the control unit; The control unit is used to control the extension movement of the piston rod according to the driving force size information.

7. A control method for an automatically controlled vehicle diversion system, applied to the automatically controlled vehicle diversion system according to any one of claims 1 to 6, characterized in that: include: Obtain the round trip time of the laser transmitter of the sensor component periodically emitting the laser, and the real-time extension displacement information of the piston rod at the corresponding moment; Determine the distance between the deflector assembly and the truck compartment according to the round trip time of periodically emitting laser light and the laser speed; According to the jump relationship between the distance between the deflector assembly and the truck compartment and time, the target extension displacement information of the piston rod when the deflector assembly contacts the edge of the truck compartment is determined; Adjust the real-time extension displacement of the piston rod to the target extension displacement.

8. The control method of the automatic vehicle diversion system according to claim 7, characterized in that: The distance between the guide plate assembly and the truck compartment is determined based on the round trip time of the periodically emitted laser and the laser speed, and is determined by the following formula: Where D is the distance between the deflector assembly and the truck compartment, C is the laser propagation speed of the laser sensor, The moment the receiver receives the reflected laser, The moment when the laser sensor emits laser.

9. The control method of the automatic vehicle flow diversion system according to claim 7, characterized in that: The step of determining target extension displacement information of the piston rod when the deflector assembly contacts the edge of the truck compartment according to the jump relationship between the distance between the deflector assembly and the truck compartment and time includes: Performing a preset derivation process on the distance between the deflector assembly and the truck compartment to obtain a derivation result; Determine the time corresponding to the item with the largest value change in the derivative result; The extension displacement of the piston rod at the corresponding time is determined according to the time corresponding to the item with the largest value change, and the extension position at this time is determined as the target extension displacement information.

10. The control method of the automatic vehicle diversion system according to claim 9, characterized in that: The distance between the deflector assembly and the truck compartment is pre-determined and derivatized, which is expressed by the following formula: in, To obtain the derivative result, D is the distance between the deflector assembly and the truck compartment, and T is the time period of periodic laser emission.

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