Wheel base adjusting method, device and system for adjusting automobile detection equipment

Abstract

The invention relates to the technical field of automobile detection equipment, and provides a wheelbase adjusting method, device and system for adjusting automobile detection equipment. The method comprises the steps that the target position of a workbench is obtained, and the displacement requirement for moving the workbench to the target position is determined; according to the position relation between the workbench and the fluid two-way power actuator and the displacement requirement, the fluid two-way power actuator is controlled to generate corresponding driving displacement, the workbench is moved to the target position, and the fluid two-way power actuator is connected with the workbench. Compared with an existing mechanical axle distance adjustment method needing a complex control algorithm, the method is simpler and more efficient, fluid driving adjustment of the axle distance is achieved by driving the workbench to move through the fluid bidirectional power actuator, and compared with a complex mechanical adjustment structure, the cost is lower, and later maintenance is simpler.

Description

Technical Field

[0001] The present disclosure relates to the technical field of automobile testing equipment, and in particular to a wheelbase adjustment method, device and system for adjusting automobile testing equipment. Background Art

[0002] Some test equipment or detection equipment for automobiles have a wheelbase adjustment system, which mainly uses a permanent magnet synchronous servo motor as the driving source, and cooperates with sensors to automatically adjust the pallet or workbench longitudinally to achieve wheelbase adjustment in different ranges, thereby adapting to the testing needs of different wheelbase models such as front-wheel drive, rear-wheel drive and four-wheel drive. At present, since the wheelbase adjustment system of these test or detection equipment is mechanically adjusted and has high requirements for adjustment accuracy, high-quality sensors and control algorithms are required, making the wheelbase adjustment system very complex and the manufacturing cost high. In addition, in actual use, the complexity of the wheelbase adjustment system makes the equipment maintenance more difficult, requiring professional technicians to operate, which in turn leads to high maintenance costs of the equipment. Summary of the invention

[0003] In view of this, the embodiments of the present disclosure provide a wheelbase adjustment method, device and system for adjusting an automobile inspection device to solve the problem of high manufacturing and maintenance costs of the wheelbase adjustment system in the automobile inspection device.

[0004] A first aspect of an embodiment of the present disclosure provides a wheelbase adjustment method for adjusting automobile inspection equipment, comprising: obtaining a target position of a workbench and determining the displacement requirement for the workbench to move to the target position; according to the positional relationship and displacement requirement between the workbench and the fluid bidirectional power actuator, controlling the fluid bidirectional power actuator to generate a corresponding driving displacement to move the workbench to the target position, and connecting the fluid bidirectional power actuator to the workbench.

[0005] According to a second aspect of an embodiment of the present disclosure, a wheelbase adjustment device for an automobile inspection equipment is provided, comprising: a displacement requirement module, for acquiring a target position of a workbench and determining a displacement requirement for the workbench to move to the target position; a position adjustment module, for controlling the fluid bidirectional power actuator to generate a corresponding driving displacement according to a positional relationship and displacement requirement between the workbench and the fluid bidirectional power actuator, and moving the workbench to the target position, wherein the fluid bidirectional power actuator is connected to the workbench.

[0006] According to a third aspect of an embodiment of the present disclosure, a wheelbase adjustment system for adjusting automobile inspection equipment is provided, comprising a workbench, a fluid bidirectional power actuator and a control device, wherein the workbench is connected to the fluid bidirectional power actuator, the control device is connected to the fluid bidirectional power actuator, and the control device comprises at least a memory, a processor and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the above-mentioned wheelbase adjustment method for adjusting automobile inspection equipment are implemented.

[0007] Compared with the prior art, the beneficial effects of the disclosed embodiments are as follows: the wheelbase adjustment method of the above-mentioned automobile inspection equipment determines the displacement requirement for the workbench to move to the target position, and controls the fluid bidirectional power actuator to drive the workbench to achieve the driving displacement of the displacement requirement, thereby driving the workbench to move from the current position to the target position. Compared with the existing mechanical wheelbase adjustment which requires complex control algorithms, the present method is simpler and more efficient. In addition, the fluid bidirectional power actuator is used to drive the workbench to move to achieve fluid-driven adjustment of the wheelbase. Compared with complex mechanical adjustment structures, the cost is lower and the subsequent maintenance is also simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 It is a schematic diagram of the principle of a wheelbase adjustment system of an automobile detection device provided by an embodiment of the present disclosure;

[0010] Figure 2 is a structural schematic diagram of a control device provided by an embodiment of the present disclosure;

[0011] Figure 3 is an application example diagram of a wheelbase adjustment system for an automobile inspection device provided by an embodiment of the present disclosure;

[0012] Figure 4 It is a flow chart of a method for adjusting the wheelbase of an automobile inspection device provided by an embodiment of the present disclosure;

[0013] Figure 5 It is a structural schematic diagram of a wheelbase adjustment device of an automobile detection equipment provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0014] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present disclosure. However, it should be clear to those skilled in the art that the present disclosure may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present disclosure with unnecessary details.

[0015] The wheelbase adjustment systems of some existing automobile testing equipment are driven by permanent magnet synchronous servo motors, combined with high-precision sensors and control algorithms to meet the needs of different models. However, due to the high complexity of the system, the manufacturing and maintenance costs are high.

[0016] In view of the above problems, please see Figure 1 and Figure 2 Some embodiments of the present disclosure provide a wheelbase adjustment system for automobile inspection equipment, including a workbench 1, a fluid bidirectional power actuator 2 and a control device 3, wherein the workbench 1 is transmission-connected to the fluid bidirectional power actuator 2, the control device 3 is connected to the fluid bidirectional power actuator 2, and the control device 3 at least includes a memory 302, a processor 301, and a computer program 303 stored in the memory 302 and executable on the processor 301, and the processor 301 implements the following steps when executing the computer program 303: obtaining a target position of the workbench 1, and determining a displacement requirement for the workbench 1 to move to the target position; and according to the displacement requirement, controlling the fluid bidirectional power actuator 2 to generate a corresponding driving displacement to move the workbench 1 to the target position.

[0017] The automobile detection equipment includes, but is not limited to, various equipment used for automobile testing or detection. For example, the automobile detection equipment can be selected as automobile safety detection equipment. Specifically, the automobile detection equipment has a wheelbase adjustment system, and the wheelbase adjustment system can adjust the position of the workbench 1 according to the wheelbase of the side car, so that the position of the workbench 1 matches the wheelbase of the car, so that each vehicle of the car can be parked on the workbench 1. In this embodiment, the workbench 1 is used to carry the tires of the car, and each workbench 1 can be used to carry tires in one position or in two positions. For example, a wheelbase adjustment system includes two workbenches 1, one of which is used to carry the two front wheels of the car, and the other workbench 1 is used to carry the two rear wheels of the car. Alternatively, a wheelbase adjustment system includes four workbenches 1, and the four workbenches 1 correspond to the tires at four positions of the car, that is, each workbench 1 is used to carry the tires at one position.

[0018] The fluid bidirectional power actuator 2 is a power device that relies on fluid as a power source to drive a piston to reciprocate in a straight line. The fluid that the fluid bidirectional power actuator 2 relies on includes gas and liquid.

[0019] For example, the fluid bidirectional power actuator 2 can be selected as a double-chamber cylinder 21, which uses compressed air as the working medium. The compressed air ratio of the two chambers is changed by inputting or discharging compressed air into or out of the two chambers to drive the piston to reciprocate in the two chamber directions.

[0020] In some embodiments, see Figure 3 The fluid bidirectional power actuator 2 includes a double-chamber cylinder 21, a pneumatic proportional valve 22, a gas pressure generating device 23 and a first displacement sensor 24. The double-chamber cylinder 21 includes two gas working chambers 211 and a first piston 212. The two gas working chambers 211 are located on both sides of the first piston 212. The first piston 212 is connected to the workbench 1 in a transmission manner. The input of the pneumatic proportional valve 22 is connected to the gas pressure generating device 23. The output of the pneumatic proportional valve 22 is connected to both gas working chambers 211. The first displacement sensor 24 is arranged on the double-chamber cylinder 21 to detect the position of the first piston 212 in the double-chamber cylinder 21. The first displacement sensor 24 and the pneumatic proportional valve 22 are connected to the control device 3 respectively. Specifically, the moving range of the first piston 212 corresponds to the moving range of the workbench 1 one by one. By detecting the position of the first piston 212 by the first displacement sensor 24, the position of the workbench 1 can be determined. In actual application, the target position of the workbench 1 is input into the control device 3, and the position of the first piston 212 is detected by the first displacement sensor 24 to determine the current position of the workbench 1, and then the displacement requirement of the workbench 1 from the current position to the target position is determined, and then the displacement required for the first piston 212 in the double-chamber cylinder 21 to move is calculated according to the displacement requirement, and the gas ratio required for the double-chamber cylinder 21 to perform the displacement is calculated, and the pneumatic proportional valve 22 is controlled according to the gas ratio to input or discharge gas to the two gas working chambers 211 of the double-chamber cylinder 21 to drive the first piston 212 to perform the corresponding displacement, thereby driving the workbench 1 to move to the target position. In this embodiment, the double-chamber cylinder 21 is selected as the fluid bidirectional power actuator 2. Since the working medium of the double-chamber cylinder 21 is air, and air is compressible, the double-chamber cylinder 21 can quickly output power to drive the workbench 1 to move.

[0021] For another example, the fluid bidirectional power actuator may be a double-acting hydraulic cylinder. The double-acting hydraulic cylinder uses hydraulic oil as the working medium. The hydraulic oil enters the two liquid working chambers of the cylinder through a control valve and applies pressure alternately to push the piston to reciprocate.

[0022] In some embodiments, the fluid bidirectional power actuator includes a double-acting hydraulic cylinder, a hydraulic proportional valve and a second displacement sensor. The double-acting hydraulic cylinder includes two liquid working chambers and a second piston. The two liquid working chambers are located on both sides of the second piston. The two liquid working chambers are respectively connected to the hydraulic proportional valve. The second piston is connected to the workbench by transmission. The second displacement sensor is arranged on the double-acting hydraulic cylinder to detect the position of the second piston in the double-acting hydraulic cylinder. The second displacement sensor and the hydraulic proportional valve are respectively connected to the control device. Specifically, the moving range of the second piston corresponds to the moving range of the workbench one by one. The position of the workbench can be determined by detecting the position of the second piston by the second displacement sensor. In actual application, the target position of the workbench is input into the control device, and the current position of the workbench is determined according to the position of the second piston detected by the second displacement sensor, and then the displacement requirement of the workbench from the current position to the target position is determined. Then, the displacement required for the second piston in the double-acting hydraulic cylinder to move is calculated according to the displacement requirement, and the hydraulic oil ratio required for the double-acting hydraulic cylinder to perform the displacement is calculated, and the hydraulic proportional valve is controlled according to the hydraulic oil ratio to input or discharge hydraulic oil into the two liquid working chambers of the double-acting hydraulic cylinder to drive the second piston to perform the corresponding displacement, thereby driving the workbench to move to the target position. In this embodiment, a double-acting hydraulic cylinder is selected as the fluid bidirectional power actuator. Since the working medium of the double-acting hydraulic cylinder is hydraulic oil, which is incompressible, the double-acting hydraulic cylinder can provide higher linear output force and precise control.

[0023] It can be seen that the wheelbase adjustment system of the automobile inspection equipment provided in this embodiment realizes pneumatic wheelbase adjustment or hydraulic wheelbase adjustment by selecting a fluid bidirectional power actuator to drive the movement of the workbench. Since the fluid bidirectional power actuator generates a driving displacement, thereby driving the workbench to move, compared with the high-precision mechanical wheelbase adjustment structure, the cost of pneumatic wheelbase adjustment or hydraulic wheelbase adjustment is lower, so that the system manufacturing cost is lower. On the basis of meeting the wheelbase adjustment needs, the system structure is also simpler, and no professional personnel are required for later maintenance, so the maintenance cost is also lower.

[0024] See also Figure 4 In some embodiments of the present disclosure, a method for adjusting the wheelbase of an automobile detection device is also provided, comprising the steps of:

[0025] S401, obtaining a target position of a workbench and determining a displacement requirement for the workbench to move to the target position;

[0026] S402, according to the positional relationship and displacement requirements between the workbench and the fluid bidirectional power actuator, the fluid bidirectional power actuator is controlled to generate corresponding driving displacement, the workbench is moved to the target position, and the fluid bidirectional power actuator is connected to the workbench.

[0027] In practical applications, Figure 1 The control device shown executes the wheelbase adjustment method of the above-mentioned automobile detection equipment, for example, Figure 2 The processor 301 in the control device shown implements the above steps S401 - S402 when executing the computer program 303 .

[0028] The displacement requirement is the displacement required for the workbench to move from the current position to the target position. There is not only one way to obtain the current position of the workbench.

[0029] For example, since the workbench is connected to the fluid bidirectional power actuator by transmission, the movable range of the workbench is associated with the movable range of the piston in the fluid bidirectional power actuator, and a linear relationship between the movable range of the workbench and the movable range of the piston in the fluid bidirectional power actuator can be established, so that a sensor (including but limited to a first displacement sensor and a second displacement sensor) can be set on the fluid bidirectional power actuator to detect the real-time position of the piston, and then the current position of the workbench is calculated based on the established linear relationship and the real-time position of the piston. When the position of the workbench needs to be adjusted, the target position of the workbench is input into the control device, and then the control device will calculate the displacement requirement based on the current position and the target position of the workbench.

[0030] In some optional embodiments, in step S401, obtaining the real-time position of the piston in the fluid bidirectional power actuator includes: obtaining the real-time position of the piston in the fluid bidirectional power actuator; determining the current position of the workbench according to the positional relationship between the fluid bidirectional power actuator and the workbench, and the real-time position of the piston in the fluid bidirectional power actuator; and determining the displacement requirement of the workbench to move to the target position according to the current position of the workbench. In this embodiment, since the fluid bidirectional power actuator is connected to the workbench by transmission, a positional relationship function between the fluid bidirectional power actuator and the workbench is pre-established, and then the real-time position of the piston is detected by installing a sensor in the fluid bidirectional power actuator, so that the current position of the workbench can be determined according to the pre-established positional relationship function and the real-time position of the piston, and when the target position of the workbench is known, the displacement requirement of the workbench from the current position to the target position can be calculated. In this embodiment, the displacement requirement of the workbench from the current position to the target position is indirectly determined by the real-time position of the piston in the fluid bidirectional power actuator, which can reduce the number of sensors, make the system structure simpler, and reduce the manufacturing cost of the system.

[0031] In some optional embodiments, in step S401, the real-time position of the piston in the fluid bidirectional power actuator is obtained, including: obtaining the current position of the workbench; determining the displacement requirement for the workbench to move to the target position according to the current position of the workbench. In this embodiment, by installing a sensor on the workbench to detect the current position of the workbench, the displacement requirement for the workbench to move from the current position to the target position can be quickly calculated when the target position of the workbench is known. In addition, since the fluid bidirectional power actuator is connected to the workbench by transmission, a position relationship function between the fluid bidirectional power actuator and the workbench is pre-established according to the position relationship between the fluid bidirectional power actuator and the workbench, and then the driving displacement that the piston in the fluid bidirectional power actuator needs to move is determined according to the pre-established position relationship function and the current position of the workbench detected, and for this purpose, another sensor is installed on the fluid bidirectional power actuator to detect the position of the piston to determine the driving displacement. Therefore, compared with the above-mentioned solution of using only one sensor, more sensors are used, but the speed of calculating the displacement requirement is faster and more accurate.

[0032] Furthermore, when the displacement requirement is determined, the control device will calculate the amount of fluid required for the fluid bidirectional power actuator to drive the workbench to move from the current position to the target position, and adjust the working fluid amount of the fluid bidirectional power actuator according to the calculated fluid amount, so that the piston of the fluid bidirectional power actuator produces a driving displacement corresponding to the displacement requirement, thereby driving the workbench to move from the current position to the target position.

[0033] The wheelbase adjustment method for automobile inspection equipment provided in this embodiment determines the displacement requirement for the workbench to move to the target position, and controls the fluid bidirectional power actuator to drive the workbench to achieve the driving displacement of the displacement requirement, thereby driving the workbench to move from the current position to the target position. Compared with the existing mechanical wheelbase adjustment which requires complex control algorithms, this method is simpler and more efficient. In addition, the fluid bidirectional power actuator is used to drive the workbench to move to achieve fluid-driven adjustment of the wheelbase, which is lower in cost and simpler in subsequent maintenance than complex mechanical adjustment structures.

[0034] In some embodiments, in step S402, the fluid bidirectional power actuator is controlled to generate a corresponding driving displacement according to the positional relationship and displacement requirement between the workbench and the fluid bidirectional power actuator, including: determining the driving displacement of the fluid bidirectional power actuator to drive the workbench to achieve the displacement requirement according to the positional relationship between the workbench and the fluid bidirectional power actuator; determining a working medium flow adjustment signal for the piston in the fluid bidirectional power actuator to generate a driving displacement according to the driving displacement; and controlling the working medium flow of the fluid bidirectional power actuator according to the working medium flow adjustment signal so that the piston achieves the driving displacement.

[0035] Since the workbench is connected to the fluid bidirectional power actuator by transmission, the positional relationship between the workbench and the fluid bidirectional power actuator is relatively fixed. For example, in this embodiment, if the workbench is connected to the fluid bidirectional power actuator, the fluid bidirectional power actuator moves linearly along a certain axis direction (such as vertical direction or horizontal direction), and the workbench moves only in this direction, it can be assumed that the position of the workbench is linearly related to the movement of the actuator, and the following function can be used to represent it:

[0036] Y = X;

[0037] Among them, Y represents the displacement of the workbench, and X represents the displacement of the piston in the fluid bidirectional power actuator, that is, the workbench and the fluid bidirectional power actuator move synchronously.

[0038] If the workbench is connected to the fluid bidirectional power actuator through a transmission mechanism, which includes but is not limited to components such as gears, levers or reducers, the displacement of the workbench is not completely proportional to the displacement of the actuator. In this case, the following function can be used to represent it:

[0039] Y = k * X;

[0040] Among them, Y represents the displacement of the workbench, X represents the displacement of the piston in the fluid bidirectional power actuator, and k represents the transmission ratio between the workbench and the fluid bidirectional power actuator.

[0041] It can be seen that after determining the displacement requirement of the workbench, the driving displacement of the fluid bidirectional power actuator can be determined according to the positional relationship between the workbench and the fluid bidirectional power actuator, so that the control device calculates the working medium flow rate of the fluid bidirectional power actuator to generate the driving displacement, generates a corresponding working medium flow adjustment signal, and controls the fluid valve (such as a hydraulic proportional valve or a pneumatic proportional valve) according to the working medium flow adjustment signal to adjust the working medium flow rate of the fluid bidirectional power actuator so that it generates a corresponding driving displacement.

[0042] In practice, the fluid bidirectional power actuator can be selected as a double-chamber cylinder or a double-acting hydraulic cylinder.

[0043] In some optional embodiments, when the fluid bidirectional power actuator is a double-chamber cylinder, the working medium flow of the fluid bidirectional power actuator is controlled according to the working medium flow adjustment signal to make the piston achieve the driving displacement, including: when the displacement demand is not zero, generating a target pressure regulation signal for the double-chamber cylinder to achieve the driving displacement according to the driving displacement; controlling the pneumatic proportional valve to adjust the gas pressure in the two gas working chambers of the double-chamber cylinder according to the target pressure regulation signal to move the piston of the double-chamber cylinder to achieve the driving displacement corresponding to the displacement demand; when the displacement demand is zero, controlling the pneumatic proportional valve according to the target pressure regulation signal to maintain the gas pressure in the two gas working chambers of the double-chamber cylinder unchanged, so that the workbench is stabilized at the target position.

[0044] In the case of a dual-chamber cylinder, the position of the piston in the cylinder can be controlled by adjusting the gas ratio (air pressure) in the two gas working chambers. Specifically, a dual-chamber cylinder usually has two gas working chambers, which are located on both sides of the piston. When the gas is pressed into one of the gas working chambers, the air pressure in the gas working chamber increases, thereby pushing the piston to move in the direction of the other gas working chamber. At the same time, the gas in the other gas working chamber is discharged, the pressure decreases, and the piston moves in the opposite direction. When the pressures in the two gas working chambers are equal, the piston will stop moving. At this time, there is no longer a difference in thrust, and the piston reaches a balanced state. To this end, this embodiment generates a target pressure regulating signal through displacement demand to control the pneumatic proportional valve to adjust the pressure difference of the gas in the two gas working chambers to achieve reciprocating motion of the piston.

[0045] In some optional embodiments, when the fluid bidirectional power actuator is a double-acting hydraulic cylinder, the working medium flow of the fluid bidirectional power actuator is controlled according to a working medium flow adjustment signal to make the piston achieve a driving displacement, including: when the displacement demand is not zero, generating a target oil pressure adjustment signal for the double-acting hydraulic cylinder to achieve the driving displacement according to the driving displacement; controlling the hydraulic proportional valve to adjust the hydraulic oil pressure in the two liquid working chambers of the double-acting hydraulic cylinder according to the target oil pressure adjustment signal to move the piston of the double-acting hydraulic cylinder to achieve the driving displacement corresponding to the displacement demand; when the displacement demand is zero, controlling the hydraulic proportional valve according to the target oil pressure adjustment signal to maintain the hydraulic oil pressure in the two liquid working chambers of the double-acting hydraulic cylinder unchanged, so that the workbench is stabilized at the target position.

[0046] In the case of a double-acting hydraulic cylinder, the double-acting hydraulic cylinder drives the reciprocating motion of the piston by the pressure difference of the hydraulic oil between the two liquid working chambers. The hydraulic oil is provided by a hydraulic pump and is controlled by a hydraulic proportional valve to flow into or out of the two liquid working chambers. Specifically, the hydraulic pump presses the hydraulic oil into one liquid working chamber of the hydraulic cylinder, pushing the piston to move in one direction, while the hydraulic oil on the other side is discharged through the control valve and the pressure is reduced. In addition, when the hydraulic proportional valve switches or the control system changes the flow direction, the hydraulic oil enters the other liquid working chamber, pushing the piston to move in the opposite direction. Similarly, the hydraulic oil in the previous chamber is discharged. When the hydraulic oil pressure in the two liquid working chambers is equal, the piston stops moving, the thrust no longer exists, and the piston will be in a stationary state, so that the workbench is stabilized at the target position. This embodiment generates a target oil pressure adjustment signal through displacement demand to control the hydraulic proportional valve to adjust the hydraulic oil pressure of the gas in the two liquid working chambers to achieve the reciprocating motion of the piston.

[0047] In some embodiments, after controlling the fluid bidirectional power actuator to generate corresponding driving displacement, it also includes: when the workbench has not moved to the target position, continuously determining the displacement requirement for the workbench to move to the target position based on the real-time position of the workbench.

[0048] Specifically, in the case where sensors are provided on both the workbench and the fluid bidirectional power actuator, after the fluid bidirectional power actuator is controlled to generate a corresponding driving displacement according to the displacement demand, it is possible to further detect whether the fluid bidirectional power actuator has moved to the target position. Due to factors such as errors, if the workbench has not reached the target position, the above steps S401 and S402 are repeated at this time, and the displacement demand is re-determined to control the fluid bidirectional power actuator to generate a corresponding driving displacement until the workbench is moved to the target position.

[0049] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present disclosure, and will not be described in detail here.

[0050] The following are embodiments of the device disclosed herein, which can be used to execute the method embodiments disclosed herein. For details not disclosed in the device embodiments disclosed herein, please refer to the method embodiments disclosed herein.

[0051] See also Figure 5 Some embodiments of the present disclosure provide a wheelbase adjustment device for an automobile detection device, the wheelbase adjustment device for the automobile detection device comprising:

[0052] The displacement requirement module 501 is used to obtain the target position of the workbench and determine the displacement requirement for the workbench to move to the target position;

[0053] The position adjustment module 502 is used to control the fluid bidirectional power actuator to generate corresponding driving displacement according to the position relationship and displacement requirements between the workbench and the fluid bidirectional power actuator, and move the workbench to the target position. The fluid bidirectional power actuator is connected to the workbench.

[0054] According to the wheelbase adjustment device of the automobile inspection equipment provided in this embodiment, the displacement requirement for the workbench to move to the target position is determined, and the fluid bidirectional power actuator is controlled to drive the workbench to achieve the driving displacement of the displacement requirement, so as to drive the workbench to move from the current position to the target position. Compared with the existing mechanical wheelbase adjustment which requires complex control algorithms, this method is simpler and more efficient. In addition, the fluid bidirectional power actuator is used to drive the workbench to move to achieve fluid-driven adjustment of the wheelbase. Compared with complex mechanical adjustment structures, this method has lower costs and simpler later maintenance.

[0055] In some embodiments, the wheelbase adjustment device of the automobile detection equipment further includes:

[0056] The feedback adjustment module 503 is used to continuously determine the displacement requirement for the workbench to move to the target position according to the real-time position of the workbench if the workbench has not moved to the target position after the control fluid bidirectional power actuator generates the corresponding driving displacement.

[0057] In some embodiments, the above-mentioned displacement requirement module 501 is used to obtain the real-time position of the piston in the fluid bidirectional power actuator; determine the current position of the workbench according to the positional relationship between the fluid bidirectional power actuator and the workbench, and the real-time position of the piston in the fluid bidirectional power actuator; and determine the displacement requirement for the workbench to move to the target position according to the current position of the workbench.

[0058] In some embodiments, the displacement requirement module 501 is used to obtain the current position of the workbench; and determine the displacement requirement for the workbench to move to the target position according to the current position of the workbench.

[0059] In some embodiments, the above-mentioned position adjustment module 502 is used to determine the driving displacement of the fluid bidirectional power actuator to drive the workbench to achieve the displacement requirement according to the position relationship between the workbench and the fluid bidirectional power actuator; determine the working medium flow adjustment signal for the piston in the fluid bidirectional power actuator to generate the driving displacement according to the driving displacement; control the working medium flow of the fluid bidirectional power actuator according to the working medium flow adjustment signal so that the piston achieves the driving displacement.

[0060] In some embodiments, when the fluid bidirectional power actuator is a dual-chamber cylinder, the above-mentioned position adjustment module 502 is used to generate a target pressure regulation signal for the dual-chamber cylinder to achieve the driving displacement according to the driving displacement when the displacement demand is not zero; the pneumatic proportional valve is controlled according to the target pressure regulation signal to adjust the gas pressure in the two gas working chambers of the dual-chamber cylinder, so that the piston of the dual-chamber cylinder moves to achieve the driving displacement corresponding to the displacement demand; when the displacement demand is zero, the pneumatic proportional valve is controlled according to the target pressure regulation signal to maintain the gas pressure in the two gas working chambers of the dual-chamber cylinder unchanged, so that the workbench is stabilized at the target position.

[0061] In some embodiments, when the fluid bidirectional power actuator is a double-acting hydraulic cylinder, the above-mentioned position adjustment module 502 is used to generate a target oil pressure adjustment signal for the double-acting hydraulic cylinder to achieve the driving displacement according to the driving displacement when the displacement demand is not zero; control the hydraulic proportional valve to adjust the hydraulic oil pressure in the two liquid working chambers of the double-acting hydraulic cylinder according to the target oil pressure adjustment signal, so that the piston of the double-acting hydraulic cylinder moves to achieve the driving displacement corresponding to the displacement demand; when the displacement demand is zero, control the hydraulic proportional valve according to the target oil pressure adjustment signal to maintain the hydraulic oil pressure in the two liquid working chambers of the double-acting hydraulic cylinder unchanged, so that the workbench is stabilized at the target position.

[0062] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present disclosure.

[0063] Furthermore, combined with Figure 1 and Figure 2 For example, the wheelbase adjustment device of the above-mentioned automobile testing equipment can be applied to Figure 1 In the control device of the wheelbase adjustment system of the automobile detection equipment shown, the control device at least includes a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and executable on the processor 301. When the processor 301 executes the computer program 303, the functions of each module in the embodiment of the wheelbase adjustment device of the above-mentioned automobile detection equipment are realized.

[0064] In practice, combined Figure 3 For example, the control device may be an industrial computer. And the control device may include but is not limited to a processor 301 and a memory 302. Those skilled in the art will understand that Figure 3 The control device is merely an example and does not limit the control device. The control device may include more or less components than those shown in the figure, or different components.

[0065] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0066] The memory 302 may be an internal storage unit of the control device, for example, a hard disk or memory of the control device. The memory 302 may also be an external storage device of the control device, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the control device. The memory 302 may also include both an internal storage unit of the control device and an external storage device. The memory 302 is used to store the computer program 303 and other programs and data required by the control device.

[0067] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0068] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present disclosure implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. The computer program may include computer program code, and the computer program code may be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0069] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be included in the protection scope of the present disclosure.

Claims

1. A method for adjusting the wheelbase of an automobile testing device, characterized in that: include: Acquire a target position of a workbench, and determine a displacement requirement for the workbench to move to the target position; According to the positional relationship between the workbench and the fluid bidirectional power actuator and the displacement requirement, the fluid bidirectional power actuator is controlled to generate corresponding driving displacement to move the workbench to the target position. The fluid bidirectional power actuator is connected to the workbench.

2. The method according to claim 1, characterized in that After controlling the fluid bidirectional power actuator to generate corresponding driving displacement, it also includes: when the workbench has not moved to the target position, continuously determining the displacement requirement for the workbench to move to the target position according to the real-time position of the workbench.

3. The method according to claim 1, characterized in that The method of obtaining the real-time position of the piston in the fluid bidirectional power actuator comprises: Get the real-time position of the piston in a fluid bidirectional power actuator; Determine the current position of the workbench according to the positional relationship between the fluid bidirectional power actuator and the workbench and the real-time position of the piston in the fluid bidirectional power actuator; According to the current position of the workbench, the displacement requirement for the workbench to move to the target position is determined.

4. The method according to claim 1, characterized in that: The method of obtaining the real-time position of the piston in the fluid bidirectional power actuator comprises: Get the current position of the workbench; According to the current position of the workbench, the displacement requirement for the workbench to move to the target position is determined.

5. The method according to any one of claims 1 to 4, characterized in that According to the positional relationship between the workbench and the fluid bidirectional power actuator and the displacement requirement, the fluid bidirectional power actuator is controlled to generate a corresponding driving displacement, including: Determine, according to the positional relationship between the workbench and the fluid bidirectional power actuator, a driving displacement for the fluid bidirectional power actuator to drive the workbench to achieve the displacement requirement; According to the driving displacement, determining a working medium flow adjustment signal for a piston in a fluid bidirectional power actuator to generate the driving displacement; The working medium flow rate of the fluid bidirectional power actuator is controlled according to the working medium flow rate adjustment signal, so that the piston achieves the driving displacement.

6. The method according to claim 5, characterized in that In the case where the fluid bidirectional power actuator is a double-chamber cylinder, the working medium flow rate of the fluid bidirectional power actuator is controlled according to the working medium flow rate adjustment signal so that the piston achieves the driving displacement, including: When the displacement requirement is not zero, a target pressure regulation signal for the double-chamber cylinder to achieve the driving displacement is generated according to the driving displacement; and a pneumatic proportional valve is controlled according to the target pressure regulation signal to adjust the gas pressure in the two gas working chambers of the double-chamber cylinder so that the piston of the double-chamber cylinder moves to achieve the driving displacement corresponding to the displacement requirement; When the displacement demand is zero, the pneumatic proportional valve is controlled according to the target pressure regulation signal to maintain the gas pressure in the two gas working chambers of the double-chamber cylinder unchanged, so that the workbench is stabilized at the target position.

7. The method according to claim 5, characterized in that In the case where the fluid bidirectional power actuator is a double-acting hydraulic cylinder, the working medium flow of the fluid bidirectional power actuator is controlled according to the working medium flow adjustment signal so that the piston achieves the driving displacement, including: When the displacement requirement is not zero, a target oil pressure regulating signal for the double-acting hydraulic cylinder to achieve the driving displacement is generated according to the driving displacement; and a hydraulic proportional valve is controlled according to the target oil pressure regulating signal to regulate the hydraulic oil pressure in the two liquid working chambers of the double-acting hydraulic cylinder, so that the piston of the double-acting hydraulic cylinder moves to achieve the driving displacement corresponding to the displacement requirement; When the displacement demand is zero, the hydraulic proportional valve is controlled according to the target oil pressure adjustment signal to maintain the hydraulic oil pressure in the two liquid working chambers of the double-acting hydraulic cylinder unchanged, so that the workbench is stabilized at the target position.

8. A wheelbase adjustment device for automobile testing equipment, characterized in that: include: A displacement requirement module, used to obtain a target position of a workbench and determine a displacement requirement for the workbench to move to the target position; The position adjustment module is used to control the fluid bidirectional power actuator to generate corresponding driving displacement according to the position relationship between the workbench and the fluid bidirectional power actuator and the displacement requirement, so as to move the workbench to the target position. The fluid bidirectional power actuator is connected to the workbench.

9. A wheelbase adjustment system for adjusting automobile testing equipment, characterized in that: It includes a workbench, a fluid bidirectional power actuator and a control device, wherein the workbench is connected to the fluid bidirectional power actuator, the control device is connected to the fluid bidirectional power actuator, and the control device at least includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method as claimed in any one of claims 1 to 7 when executing the computer program.

10. The wheelbase adjustment system for adjusting automobile testing equipment according to claim 9, characterized in that: The fluid bidirectional power actuator comprises a double-chamber cylinder, a pneumatic proportional valve, an air pressure generating device and a first displacement sensor. The double-chamber cylinder comprises two gas working chambers and a first piston. The two gas working chambers are located on both sides of the first piston. The first piston is connected to the workbench in a transmission manner. The input of the pneumatic proportional valve is connected to the air pressure generating device. The output of the pneumatic proportional valve is connected to both gas working chambers. The first displacement sensor is arranged on the double-chamber cylinder to detect the position of the first piston in the double-chamber cylinder. The first displacement sensor and the pneumatic proportional valve are connected to the control device respectively. Alternatively, the fluid bidirectional power actuator includes a double-acting hydraulic cylinder, a hydraulic proportional valve and a second displacement sensor. The double-acting hydraulic cylinder includes two liquid working chambers and a second piston. The two liquid working chambers are located on both sides of the second piston. The two liquid working chambers are respectively connected to the hydraulic proportional valve. The second piston is connected to the workbench in a transmission manner. The second displacement sensor is arranged on the double-acting hydraulic cylinder for detecting the position of the second piston in the double-acting hydraulic cylinder. The second displacement sensor and the hydraulic proportional valve are respectively connected to the control device.

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