Intelligent control and damping system and control method for commercial vehicle seats

Abstract

The present invention discloses an intelligent control and damping system and control method for commercial vehicle seats, including an intelligent control system, the intelligent control system is used to receive acceleration signals and output control signals; a driving device, the driving device is used to receive control signals and output driving power; a damping adjustment mechanism, the damping adjustment mechanism can receive the driving power to adjust the vibration amplitude of the seat. The control method of the present invention collects acceleration signals in the vehicle; the intelligent control system calculates the vibration amplification algorithm according to the acceleration signal, and outputs the control signal according to the calculation result; the driving device drives the damping adjustment mechanism to perform damping adjustment according to the received control signal. The present invention meets the passenger comfort requirements by intelligently adjusting the damping according to the road conditions of the seat, such as the poor road conditions of the commercial vehicle seat, the long driving time of the customer, etc., and greatly improves the dynamic comfort of the shock-absorbing seat.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent control of automobile seats, and in particular to an intelligent control and damping system for commercial vehicle seats and a control method. Background Art

[0002] At present, most of the seats mass-produced in the domestic commercial vehicle market are airbag damping seats. When driving on complex and unique bumpy road conditions such as potholes, stone roads or adobe roads, the seats mainly use airbags and dampers to reduce road impact and absorb energy and reduce shock. Among them, the strength of the seat's energy absorption and shock absorption function can be achieved by the damping force of the damper's stretching and compression. However, with the steady growth of sales in the commercial vehicle market, drivers' demand for seat comfort is increasing. Fixed airbag stiffness and manually adjusted damping force still cannot better reduce driving fatigue and physical health problems caused by long-term driving for drivers who drive long distances to transport goods. In addition, the road conditions of commercial vehicles are complex and changeable, and it is impossible for drivers to always adjust the seat's shock absorption stiffness without driving the steering wheel. Drivers hope that the seat can automatically adjust the damping force by monitoring the road conditions, that is, it can automatically reduce the damping force when driving on high-speed roads and automatically increase the damping force when driving on low-speed bumpy roads.

[0003] The shortcoming of the prior art is that there is no functional device on how to intelligently adjust the damping force in the market, and most of the seats are airbag damping and shock-absorbing seats with airbags for shock absorption. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to meet the needs of existing customers for automatic adjustment of the damping and shock absorption function, so that the seat damping does not need to be frequently adjusted manually according to road conditions, thereby truly reducing the driver's fatigue during long and short distance driving.

[0005] To achieve the above objectives, an intelligent control and damping system and control method for commercial vehicle seats are used to solve the problems raised in the above background technology.

[0006] An intelligent control and damping system for commercial vehicle seats, comprising:

[0007] An intelligent control system, the intelligent control system is used to receive an acceleration signal and output a control signal;

[0008] A driving device, the driving device is used to receive a control signal and output a driving power;

[0009] The damping adjustment mechanism can receive driving power to adjust the vibration amplitude of the seat.

[0010] Preferably, the signal input end of the intelligent control system is connected to an acceleration sensor.

[0011] Preferably, the power output end of the driving device is connected to one end of the damping adjustment cable, and the other end of the damping adjustment cable is connected to the damping adjustment mechanism.

[0012] Preferably, the damping adjustment mechanism includes a telescopic seat frame, a damping shock absorber arranged in the middle of the telescopic seat frame, and an adjustment mechanism arranged at the extended end of the damping shock absorber.

[0013] Preferably, the adjustment mechanism includes a guide post, a guide sleeve for placing the guide post, a fixing seat for fixing the guide post and the guide sleeve, and a return spring arranged in the fixing seat.

[0014] A control method for an intelligent control and damping system of a commercial vehicle seat comprises the following steps:

[0015] S1, collecting acceleration signals in the vehicle;

[0016] S2, the intelligent control system performs calculations based on the acceleration signal using a vibration amplification algorithm, and determines the output control signal based on the calculation results;

[0017] S3. The driving device drives the damping adjustment mechanism to perform damping adjustment according to the received control signal.

[0018] Preferably, the acceleration signal specific method includes:

[0019] The acceleration signal includes the vibration acceleration A2 collected on the seat cushion and the vibration acceleration A1 collected on the floor of the cab.

[0020] Preferably, the intelligent control system performs calculations based on the acceleration signal using a vibration amplification algorithm, and the specific steps of determining the output control signal based on the calculation result include:

[0021] S21, substituting the vibration accelerations A1 and A2 into the vibration amplification algorithm to obtain the vibration amplification β, wherein the algorithm formula of the vibration amplification β is: β=A2 / A1;

[0022] S22, intelligent control system simultaneously detects the vibration frequency of the floor in the cab;

[0023] S23. Output a control signal according to the calculation result and the vibration frequency.

[0024] Preferably, the specific step of outputting a control signal according to the calculation result and the vibration frequency includes:

[0025] When the vibration frequency of the floor in the cab is detected to be less than 2Hz, the intelligent control system sends a control signal to the drive device to increase the damping force of the damping shock absorber;

[0026] When the vibration frequency of the floor in the cab is detected to be greater than 2Hz, the intelligent control system sends a control signal to the drive device to reduce the damping force of the damping shock absorber;

[0027] When the vibration frequency of the floor in the cab is detected to be between 4Hz and 12Hz, the intelligent control system sends a signal to the drive unit to reduce the damping force of the shock absorber.

[0028] Preferably, the control signal includes outputting a forward signal and a forward transmission time as well as a reverse signal and a reverse transmission time.

[0029] Compared with the prior art, the present invention has the following technical effects: the present invention sets up an intelligent seat shock absorption system, collects acceleration by using sensors, detects the vibration frequency of the cockpit, compares the experimental data threshold, and then adjusts the damping of the damping shock absorber, which solves the existing customer's demand for intelligent adjustment of the damping shock absorption function, and does not need to manually adjust the seat damping, thereby truly reducing the driver's fatigue in long and short-distance driving. In particular, it solves the instantaneous impact and vibration felt by the driver when the commercial vehicle transitions from a high-frequency vibration road surface to a low-frequency vibration road surface. It improves the driver's requirements for the dynamic comfort of the seat during driving, and also reduces the health problems caused by long-term driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0031] Figure 1 It is a schematic diagram of the structure of the intelligent control and damping system of some embodiments disclosed in the present invention;

[0032] Figure 2 It is a schematic structural diagram of a damping adjustment mechanism and a driving mechanism of some embodiments disclosed in the present invention;

[0033] Figure 3 A schematic diagram of the maximum damping position of the damping adjustment mechanism of some embodiments disclosed in the present invention;

[0034] Figure 4 A schematic diagram of an intelligent control and damping system on a seat according to some embodiments disclosed in the present invention;

[0035] Figure 5 A flow chart of a commercial vehicle seat intelligent control method according to some embodiments disclosed in the present invention;

[0036] Figure 6 This is a control algorithm diagram of the intelligent control shock absorption system of some embodiments disclosed in the present invention.

[0037] In the figure: 1. Intelligent control system; 10. Acceleration sensor; 2. Driving device; 21. Damping adjustment cable; 3. Damping adjustment mechanism; 30. Adjustment mechanism; 301. Guide column; 302. Guide sleeve; 303. Fixed seat; 304. Return spring; 31. Telescopic seat frame; 32. Damping shock absorber. DETAILED DESCRIPTION

[0038] In order to further illustrate the features of the present invention, please refer to the following detailed description and drawings of the present invention. The drawings are for reference and illustration only and are not intended to limit the scope of protection of the present invention.

[0039] Please refer to Figure 1-4 In an embodiment of the present invention, an intelligent control and damping system for a commercial vehicle seat includes an intelligent control system 1, a driving device 2 and a damping adjustment mechanism 3.

[0040] The intelligent control system 1 can be used to receive acceleration signals and output control signals, and the signal input end of the intelligent control system is connected to an acceleration sensor;

[0041] The driving device 2 can be used to receive a control signal and output driving power;

[0042] The damping adjustment mechanism 3 can receive driving power to adjust the vibration amplitude of the seat. The damping adjustment mechanism 3 includes a telescopic seat frame 31, a damping shock absorber 32 arranged in the middle of the telescopic seat frame 31, and an adjustment mechanism 30 arranged at the extension end of the damping shock absorber 32.

[0043] The power output end of the driving device 2 of the specific embodiment is connected to one end of the damping adjustment cable 21, and the other end of the damping adjustment cable 21 is connected to the damping adjustment mechanism

[0044] The adjustment mechanism 30 of the specific embodiment includes a guide post 301 , a guide sleeve 302 for placing the guide post 301 , a fixing seat 303 for fixing the guide post 301 and the guide sleeve 302 , and a return spring 304 arranged in the fixing seat 303 .

[0045] Please refer to Figure 5 In this embodiment, a control method for a commercial vehicle seat intelligent control and damping system includes the following steps:

[0046] S1, collecting acceleration signals in the vehicle;

[0047] S2, the intelligent control system performs calculations based on the acceleration signal using a vibration amplification algorithm, and determines the output control signal based on the calculation results;

[0048] S21, substituting the vibration accelerations A1 and A2 into the vibration amplification algorithm to obtain the vibration amplification β, wherein the algorithm formula of the vibration amplification β is: β=A2 / A1;

[0049] S22, intelligent control system simultaneously detects the vibration frequency of the floor in the cab;

[0050] S23. Output a control signal according to the calculation result and the vibration frequency.

[0051] At this time, when it is detected that the vibration frequency of the floor in the cab is less than 2Hz, the intelligent control system sends a control signal to the drive device to increase the damping force of the damping shock absorber;

[0052] When the vibration frequency of the floor in the cab is detected to be greater than 2Hz, the intelligent control system sends a control signal to the drive device to reduce the damping force of the damping shock absorber;

[0053] When the vibration frequency of the floor in the cab is detected to be between 4Hz and 12Hz, the intelligent control system sends a signal to the drive device to reduce the damping force of the damping shock absorber. The vibration acceleration collected on the seat cushion is A2, and the vibration acceleration collected on the floor of the cab is A1. The control signal includes the output forward signal and forward transmission time, as well as the reverse signal and reverse time.

[0054] S3. The driving device drives the damping adjustment mechanism to perform damping adjustment according to the received control signal.

[0055] Please refer to Figure 6 , the following are the experimental results obtained by the present invention according to the principle of the seat damping system comfort control algorithm:

[0056] The horizontal axis is the vibration frequency input Frequency in the cab, the vertical axis is the seat cushion surface vibration amplification β, line 1 is the seat cushion surface vibration output curve when the damping is small, line 2 is the seat cushion surface vibration output curve when the damping is large, and the dotted box 3 is the frequency range of 4Hz to 12Hz for the human body sensitive area.

[0057] When the system detects that the vibration frequency of the floor in the cab is less than 2Hz, such as when the commercial vehicle is driving on a highway, the damping value of the damping shock absorber is increased according to the experimental curve, effectively reducing the seat vibration amplification factor β, so that the seat quickly absorbs energy and reduces vibration. At this time, the seat vibration amplitude is controlled to the minimum, and the comfort is the best;

[0058] When the system detects that the floor vibration frequency in the cab is greater than 2Hz, such as when the commercial vehicle is driving on a low-speed bumpy road, the damping value of the damper is reduced according to the experimental curve, effectively reducing the seat vibration amplification factor β, so that the seat quickly absorbs energy and reduces shock. At this time, the seat vibration amplitude is controlled to the minimum, and the comfort is the best;

[0059] When the system detects that the vibration frequency of the floor in the cab is between 4Hz and 12Hz, which is within the frequency range of the human body's sensitive area, the damping value of the shock absorber is reduced according to the experimental curve, so that the seat can quickly absorb energy and reduce shock, avoiding resonance between the human body and the cab and improving human riding comfort.

[0060] The working principles and working processes of some disclosed embodiments of the present invention are as follows:

[0061] The acceleration sensor 10 collects the acceleration signal of the cab in the vehicle and transmits it to the intelligent control system 1. The intelligent control system 1 outputs a pulse signal to the drive device 2. When the drive device 2 drives the rotating cam to move, the damping adjustment wire 21 is pulled out, driving the guide column 301 to move into the guide sleeve 302. During the movement, the guide column 301 compresses the return spring 304, and also drives the damping shock absorber 32 to rotate clockwise, thereby increasing the damping. When the damping adjustment wire 21 is released, the return spring 304 releases the rebound force, pushing the guide column 301 to move outward along the direction of the guide sleeve 302, and also drives the damping shock absorber 32 to rotate counterclockwise, thereby reducing the damping.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents, and all should be included within the scope of protection of the present invention.

Claims

1. An intelligent control and damping system for commercial vehicle seats, characterized in that: include: An intelligent control system (1), the intelligent control system being used to receive an acceleration signal and output a control signal; A driving device (2), the driving device being used to receive a control signal and output a driving force; A damping adjustment mechanism (3), wherein the damping adjustment mechanism can receive driving power to adjust the vibration amplitude of the seat; The power output end of the driving device is connected to one end of a damping adjustment cable (21), and the other end of the damping adjustment cable is connected to a damping adjustment mechanism; The damping adjustment mechanism comprises a telescopic seat frame (31), a damping shock absorber (32) arranged in the middle of the telescopic seat frame, and an adjustment mechanism (30) arranged at the extended end of the damping shock absorber; The adjustment mechanism comprises a guide post (301), a guide sleeve (302) for placing the guide post, a fixing seat (303) for fixing the guide post and the guide sleeve, and a return spring (304) arranged in the fixing seat; The signal input end of the intelligent control system is connected to an acceleration sensor (10); The control method of the shock absorbing system comprises the following steps: S1, collecting acceleration signals in the vehicle; S2, the intelligent control system performs a vibration amplification algorithm to calculate according to the acceleration signal, and determines the output control signal according to the calculation result; S3. The driving device drives the damping adjustment mechanism to perform damping adjustment according to the received control signal.

2. A control method for a commercial vehicle seat intelligent control and damping system according to any one of claim 1, characterized in that: The acceleration signal specific method includes: The acceleration signal includes the vibration acceleration A2 collected on the seat cushion and the vibration acceleration A1 collected on the floor of the cab.

3. The control method for the intelligent control and damping system of a commercial vehicle seat according to claim 2 is characterized in that: The intelligent control system performs calculations based on the acceleration signal using a vibration amplification algorithm, and the specific steps of determining the output control signal based on the calculation results include: S21, substituting the vibration accelerations A1 and A2 into the vibration amplification algorithm to obtain the vibration amplification β, wherein the algorithm formula of the vibration amplification β is: β=A2 / A1; S22, intelligent control system simultaneously detects the vibration frequency of the floor in the cab; S23. Output a control signal according to the calculation result and the vibration frequency.

4. The control method for the intelligent control and damping system of a commercial vehicle seat according to claim 3 is characterized in that: The specific steps of outputting the control signal according to the calculation result and the vibration frequency include: When the vibration frequency of the floor in the cab is detected to be less than 2Hz, the intelligent control system sends a control signal to the drive device to increase the damping force of the damping shock absorber; When the vibration frequency of the floor in the cab is detected to be greater than 2Hz, the intelligent control system sends a control signal to the drive device to reduce the damping force of the damping shock absorber; When the vibration frequency of the floor in the cab is detected to be between 4Hz and 12Hz, the intelligent control system sends a signal to the drive unit to reduce the damping force of the shock absorber.

5. The control method for the intelligent control and damping system of a commercial vehicle seat according to claim 4 is characterized in that: The control signal includes outputting a forward signal and a forward transmission time as well as a reverse signal and a reverse transmission time.

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