Data acquisition system, connection device and method for minimum turning diameter of automobile

Abstract

The invention discloses an automobile minimum turning diameter data acquisition system, a connection device and a method, and belongs to the technical field of automobile minimum turning diameter measurement. The method comprises the following steps: driving a to-be-measured automobile on a light source imaging plate; the optical sensor is arranged on the connecting block of the connecting device; the base of the connecting device is arranged on the side surface of the outer front door of the to-be-tested automobile; electrifying is conducted; the light source emitting angle of the optical sensor is adjusted, so that a light source emitted by the optical sensor to the light source imaging plate is over against the rear light source imaging plate corresponding to the central point of the contact position of the tread of the front tire on the outer side of the to-be-detected automobile and the light source imaging plate when the steering wheel rotates to the limit position; controlling a steering wheel of the to-be-tested automobile to be kept at a limit position and controlling the to-be-tested automobile to run at a low speed; and data of the minimum turning diameter of the to-be-measured automobile is obtained through the computer and is displayed on a computer screen. According to the invention, the data of the minimum turning diameter of the automobile can be automatically and accurately obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring the minimum turning diameter of an automobile, and in particular, the invention relates to a data acquisition system, a connecting device and a method for the minimum turning diameter of an automobile. Background Art

[0002] The minimum turning diameter of a car refers to the diameter of the track circle left by the center plane of the outer steering wheel on the support plane when the car is driving at a low speed when the steering wheel is turned to the extreme position. In addition, the minimum turning diameter of a car is an important indicator for measuring the maneuverability of the vehicle. It represents the ability of the car to turn around in a narrow and curved area. The smaller the minimum turning diameter of the car, the higher the maneuverability of the car.

[0003] Patent CN204234235U discloses a marking device for measuring the turning diameter of an automobile, the device comprising a fixed bracket, the fixed bracket comprising a fixed portion, a fixed support portion connected to the fixed portion at one end, wherein the marking device is fixed to the side of the vehicle body through the fixed portion; a liquid storage device arranged at the other end of the fixed support portion, the liquid storage device comprising a container for storing liquid, a conduit inserted into the container at one end, and a water spray head connected to the other end of the conduit, the liquid in the container flows out from the water spray head through the conduit; a liquid storage device arranged vertically to the fixed support portion A position positioning rod, one end of which is fixed to the fixed support part, and the other end is connected to the water spray head on the conduit, and the position positioning rod is parallel to the direction in which the liquid in the water spray head flows out; wherein, two through holes are provided on the fixed support part, at one end connected to the liquid storage device, and a clamping strip is further provided between the two through holes, and the through holes are fixed to the clamping strip by passing bolts, and the container is clamped in the clamping strip; wherein, a slideway is further provided on the fixed support plate along the length direction, and the position positioning rod is fixed on the slideway at a preset distance from the liquid storage device.

[0004] However, the technical solution disclosed in the above patent still requires manual measurement to obtain the diameter data of the trajectory circle formed on the ground, which is not intelligent enough. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a data acquisition system, a connection device and a method for the minimum turning diameter of a car in view of the deficiencies of the prior art, so as to achieve the purpose of automatically and accurately acquiring the data of the minimum turning diameter of the car.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The invention provides a data acquisition system for the minimum turning diameter of an automobile, comprising a power supply, an optical sensor, a connecting device, a light source imaging board, a photoelectric converter, a data acquisition instrument and a computer, wherein the output end of the power supply is respectively connected to the input end of the light source imaging board, the input end of the photoelectric converter, the input end of the data acquisition instrument and the input end of the computer; the output end of the light source imaging board is connected to the input end of the photoelectric converter; the output end of the photoelectric converter is connected to the input end of the data acquisition instrument; the output end of the data acquisition instrument is connected to the input end of the computer; and the optical sensor is connected to the automobile to be tested through the connecting device.

[0008] Furthermore, the optical sensor emits light to a light source imaging plate; the light source imaging plate displays the moving trajectory of the light source; the photoelectric converter receives the potential change of the moving trajectory of the light source on the light source imaging plate, converts the light signal into an electrical signal and transmits it to the data acquisition instrument; the data acquisition instrument receives the electrical signal transmitted by the photoelectric converter and processes the electrical signal, and transmits the processed data to the computer; the computer receives the data transmitted by the data acquisition instrument and displays it on the computer screen.

[0009] Furthermore, the light source emitted by the optical sensor to the light source imaging plate is directly facing the rear light source imaging plate corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate when the steering wheel is turned to the extreme position.

[0010] Further, the distance between the light source emitted by the optical sensor to the light source imaging plate and the center point is not greater than a boundary value.

[0011] Further, the boundary value is 2 mm.

[0012] The present invention also provides a connecting device for a data acquisition system for the minimum turning diameter of an automobile, comprising a base, a connecting rod, a connecting block and bolts, wherein one side of the base is fixed to a door of the automobile, and the other side of the base is connected to one end of a first connecting rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to one end of the third connecting rod, the other end of the third connecting rod is hinged to one end of the fourth connecting rod, the other end of the fourth connecting rod is connected to a connecting block, and the connecting block is connected to an optical sensor.

[0013] Furthermore, the first connecting rod is fixed to the car door through the base, the rotating axis of the car door is the Z axis, the second connecting rod rotates around the X axis, the third connecting rod rotates around the Z axis, and the fourth connecting rod rotates around the Y axis.

[0014] The present invention provides a method for acquiring data of a minimum turning diameter of a vehicle, the method comprising the following steps:

[0015] S1: Connect the output end of the power supply to the input end of the light source imaging board, the input end of the photoelectric converter, the input end of the data acquisition instrument and the input end of the computer respectively;

[0016] S2: connecting the output end of the light source imaging board to the input end of the photoelectric converter, connecting the output end of the photoelectric converter to the input end of the data acquisition instrument, and connecting the output end of the data acquisition instrument to the input end of the computer;

[0017] S3: driving the car to be tested onto the light source imaging board;

[0018] S4: Turn the steering wheel of the vehicle to be tested to the extreme position;

[0019] S5: placing the optical sensor on the connecting block of the connecting device;

[0020] S6: Setting the base of the connection device on the side of the outer front door of the vehicle to be tested;

[0021] S7: Connect the optical sensor to the cigarette lighter in the vehicle to be tested through a wire;

[0022] S8: Power on;

[0023] S9: Adjust the angle of the light source emitted by the optical sensor so that the light source emitted by the optical sensor to the light source imaging plate is directly on the rear light source imaging plate corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate when the steering wheel is turned to the extreme position;

[0024] S10: Control the steering wheel of the vehicle under test to remain at the limit position and control the vehicle under test to travel at a low speed;

[0025] S11: Obtain data of the minimum turning diameter of the vehicle to be tested through a computer and display it on a computer screen.

[0026] Further, when the steering wheel of the vehicle to be tested is turned to the left to the extreme position through S5, the base of the connecting device is set on the side of the outer right front door of the vehicle to be tested through S7; when the steering wheel of the vehicle to be tested is turned to the right to the extreme position through S5, the base of the connecting device is set on the side of the outer left front door of the vehicle to be tested through S7.

[0027] The data acquisition system, connection device and method of the minimum turning diameter of an automobile of the present invention have the following advantages:

[0028] (1) The system, connection device and method of the present invention can achieve the purpose of automatically and accurately obtaining data on the minimum turning diameter of a car.

[0029] (2) The data of the minimum turning diameter of the automobile obtained by the system, connection device and method of the present invention provides a preparation for the subsequent computer software to calculate the minimum turning diameter of the automobile.

[0030] (3) The data of the minimum turning diameter of a vehicle is obtained by the system, connection device and method of the present invention, which is more intelligent than manual measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] This specification includes the following drawings, which show the following contents:

[0032] Figure 1 It is a logical structure block diagram of a data acquisition system for a minimum turning diameter of an automobile according to the present invention;

[0033] Figure 2 is a structural diagram of the connection device of the present invention;

[0034] Figure 3 is a structural diagram of a first hole and a second hole in a connecting rod of the present invention;

[0035] Figure 4 The present invention is a flowchart of a method for acquiring data of a minimum turning diameter of an automobile.

[0036] Explanation of the accompanying drawings: 1. power supply; 2. optical sensor; 3. connecting device; 4. light source imaging board; 5. photoelectric converter; 6. data acquisition instrument; 7. computer; 31. base; 32. connecting block; 33. bolt; 34. first connecting rod; 35. second connecting rod; 36. third connecting rod; 37. fourth connecting rod; 38. first hole; 39. second hole. DETAILED DESCRIPTION

[0037] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0038] Figure 1 The present invention is a logical structure block diagram of a data acquisition system for the minimum turning diameter of an automobile, comprising a power supply 1, an optical sensor 2, a connecting device 3, a light source imaging board 4, a photoelectric converter 5, a data acquisition instrument 6 and a computer 7. The output end of the power supply 1 is respectively connected to the input end of the light source imaging board 4, the input end of the photoelectric converter 5, the input end of the data acquisition instrument 5 and the input end of the computer 7; the output end of the light source imaging board 4 is connected to the input end of the photoelectric converter 5; the output end of the photoelectric converter 5 is connected to the input end of the data acquisition instrument 6; the output end of the data acquisition instrument 6 is connected to the input end of the computer 7; the optical sensor 2 is connected to the automobile to be tested through the connecting device 3.

[0039] In this specific embodiment, the optical sensor 2 emits light to the light source imaging board 4; the light source imaging board 4 receives the light emitted by the optical sensor 2, and displays the moving track of the light source on the light source imaging board 4 according to the movement of the light source; the photoelectric converter 5 receives the potential change of the moving track of the light source on the light source imaging board 4, converts the optical signal into an electrical signal and transmits it to the data acquisition instrument 6; the data acquisition instrument 6 receives the electrical signal transmitted by the photoelectric converter 5 and processes the electrical signal, and transmits the processed data to the computer 7; the computer 7 receives the data transmitted by the data acquisition instrument 6 and displays it on the screen of the computer 7. That is, it can realize automatic and accurate acquisition of the data of the minimum turning diameter of the car, and at the same time, it provides preparation for the subsequent computer 7 software to calculate the minimum turning diameter of the car. In addition, this method is more intelligent than manual measurement.

[0040] Among them, the light source emitted by the optical sensor 2 to the light source imaging plate 4 is on the rear light source imaging plate 4 corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate 4 when the steering wheel is turned to the extreme position; the distance between the light source emitted by the optical sensor 2 to the light source imaging plate 4 and the center point is not greater than the boundary value.

[0041] In addition, in this specific trial implementation mode, the aforementioned boundary value is 2 mm.

[0042] Figure 2 It is a structural diagram of the connecting device 3 of the present invention, the connecting device 3 includes a base 31, a connecting rod, a connecting block 32 and a bolt 33. One side of the base 31 is fixed on the car door, and the other side of the base 31 is connected to one end of a first connecting rod 34. The other end of the first connecting rod 34 is hinged to one end of a second connecting rod 35. The other end of the second connecting rod 35 is hinged to one end of a third connecting rod 36. The other end of the third connecting rod 36 is hinged to one end of a fourth connecting rod 37. The other end of the fourth connecting rod 37 is connected to a connecting block 32, and the connecting block 32 is connected to an optical sensor 2.

[0043] in, Figure 3 is a structural diagram of the first hole 38 and the second hole 39 in the connecting rod of the present invention, Figure 3 It can be seen that the position and structure of the first hole 38 and the second hole 39. Further, as Figure 2 and Figure 3As shown, the connecting rods are provided with a first hole 38 and a second hole 39, respectively. The axial direction of the first hole 38 is along the length direction of the rod, and the axial direction of the second hole 39 is perpendicular to the length direction of the rod. The end of the first connecting rod 34 connected to the second connecting rod 35 is provided with a first hole 38; the end of the second connecting rod 35 connected to the first connecting rod 34 is provided with a first hole 38; the end of the second connecting rod 35 connected to the third connecting rod 36 is provided with a second hole 39; the end of the third connecting rod 36 connected to the second connecting rod 35 is provided with a first hole 38; the end of the third connecting rod 36 connected to the fourth connecting rod 37 is provided with a second hole 39; the end of the fourth connecting rod 37 connected to the third connecting rod 36 is provided with a first hole 38. The first connecting rod 34 and the second connecting rod 35 are hinged by bolts 33, the second connecting rod 35 and the third connecting rod 36 are hinged by bolts 33, and the third connecting rod 36 and the fourth connecting rod 37 are hinged by bolts 33. In addition, the connecting device 3 of this specific embodiment is provided with three bolts 33.

[0044] In addition, the first connecting rod 34 is fixed to the car door through the base 31, the rotating shaft of the car door is the Z axis, the second connecting rod 35 rotates around the X axis, the third connecting rod 36 rotates around the Z axis, and the fourth connecting rod 37 rotates around the Y axis. The car door uses the axle as the rotating shaft and can be rotated around the Z axis. The second connecting rod 35 uses the bolt 33 as the rotating shaft and can be rotated around the X axis. The third connecting rod 36 uses the bolt 33 as the rotating shaft and can be rotated around the Z axis. The fourth connecting rod 37 uses the bolt 33 as the rotating shaft and can be rotated around the Y axis.

[0045] Combine the following Figures 1 to 3 The working principle of the system of the present invention is introduced as follows:

[0046] First, the light source imaging board 4 needs to be assembled and laid flat on the flat ground; secondly, the output end of the power supply 1 needs to be connected to the input end of the light source imaging board 4, the input end of the photoelectric converter 5, the input end of the data acquisition instrument 6 and the input end of the computer 7 respectively; then, the output end of the light source imaging board 4 needs to be connected to the input end of the photoelectric converter 5, the output end of the photoelectric converter 5 needs to be connected to the input end of the data acquisition instrument 6, and the output end of the data acquisition instrument 6 needs to be connected to the input end of the computer 7; then, the vehicle to be tested needs to be driven onto the light source imaging board 4 and the vehicle to be tested needs to be connected to the input end of the data acquisition instrument 6. The steering wheel of the vehicle is turned to the extreme position; then the optical sensor 2 needs to be set on the connecting block 32 of the connecting device 3 and the optical sensor 2 is connected to the cigarette lighter in the vehicle to be tested through a wire; then it is necessary to power on and adjust the angle of the light source emitted by the optical sensor 2 so that the light source emitted by the optical sensor 2 on the light source imaging board 4 is directly facing the rear light source imaging board 4 corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging board 4 when the steering wheel is turned to the extreme position; finally, it is necessary to control the steering wheel of the vehicle to be tested to remain unchanged at the extreme position and control the vehicle to be tested to drive at a low speed.

[0047] When the steering wheel of the vehicle to be tested is controlled to remain unchanged at the extreme position, the vehicle to be tested is controlled to travel at a low speed on the light source imaging plate 4, the speed of the low speed travel is not less than 5 kilometers per hour and not more than 10 kilometers per hour, and the number of circles of the low speed travel of the vehicle to be tested is controlled to be not less than one circle.

[0048] When the vehicle to be tested is driving on the optical imaging plate 4 at a low speed, the light source emitted by the optical sensor 2 to the light source imaging plate 4 will leave a track on the light source imaging plate 4, and the light source imaging plate 4 will display the track left by the light source emitted by the optical sensor 2. After the vehicle to be tested drives a circle on the light source imaging plate 4, the light source emitted by the optical sensor 2 to the light source imaging plate 4 will leave a closed track circle on the light source imaging plate 4, and the light source imaging plate 4 will display the closed track circle left by the light source emitted by the optical sensor 2.

[0049] When the vehicle to be tested is driving at a low speed on the light source imaging board 4, the optical sensor 2 emits a light source to the light source imaging board 4; the light source imaging board 4 receives the light source emitted by the optical sensor 2, and displays the moving track of the light source on the light source imaging board 4 according to the movement of the light source; the photoelectric converter 5 receives the potential change of the moving track of the light source on the light source imaging board 4, converts the optical signal into an electrical signal and transmits it to the data acquisition instrument 6; the data acquisition instrument 6 receives the electrical signal transmitted by the photoelectric converter 5 and processes the electrical signal, and transmits the processed data to the computer 7; the computer 7 receives the data transmitted by the data acquisition instrument 6 and displays it on the screen of the computer 7. The diameter of the closed track circle left by the light source emitted by the optical sensor 2 displayed on the light source imaging board 4 is automatically calculated by the computer 7 according to the received data, that is, the minimum turning diameter of the vehicle to be tested. It can realize automatic and accurate acquisition of the data of the minimum turning diameter of the vehicle, and this method is more intelligent than manual measurement.

[0050] Among them, the aforementioned automatic calculation of the diameter of the closed trajectory circle left by the light source emitted by the optical sensor 2 displayed on the light source imaging plate 4 by the computer 7 based on the received data may be merely the reception and recording of data by the computer 7. The processing of the data is not the invention point of the present application and may be developed later.

[0051] Figure 4 The flowchart of the method for acquiring data of the minimum turning diameter of a vehicle of the present invention comprises the following steps:

[0052] S1: Connect the output end of the power supply 1 to the input end of the light source imaging board 4, the input end of the photoelectric converter 5, the input end of the data acquisition instrument 6 and the input end of the computer 7, that is, Figure 4 S1 in. Specifically, before the test, the light source imaging board 4 needs to be assembled first, and the assembled light source imaging board 4 needs to be laid flat on a flat ground. The light source imaging board 4 can be folded and put away when not in use. Afterwards, by connecting the output end of the power supply 1 to the input end of the light source imaging board 4, the input end of the photoelectric converter 5, the input end of the data acquisition instrument 6 and the input end of the computer 7 respectively, the power supply 1 can supply power to the light source imaging board 4, the photoelectric converter 5, the data acquisition instrument 6 and the computer 7 during the operation of the system of the present invention.

[0053] S2: Connect the output end of the light source imaging board 4 to the input end of the photoelectric converter 5, connect the output end of the photoelectric converter 5 to the input end of the data acquisition instrument 6, and connect the output end of the data acquisition instrument 6 to the input end of the computer 7, that is, corresponding to Figure 4S2 in the figure. Specifically, during the operation of the system of the present invention, the optical sensor 2 emits a light source to the light source imaging board 4; the light source emitted by the optical sensor 2 is received by the light source imaging board 4, and the moving track of the light source is displayed on the light source imaging board 4 according to the movement of the light source; the photoelectric converter 5 receives the potential change of the moving track of the light source on the light source imaging board 4, converts the optical signal into an electrical signal and transmits it to the data acquisition instrument 6; the data acquisition instrument 6 receives the electrical signal transmitted by the photoelectric converter 5 and processes the electrical signal, and transmits the processed data to the computer 7; the computer 7 receives the data transmitted by the data acquisition instrument 6 and displays it on the screen of the computer 7.

[0054] S3: The vehicle to be tested is driven onto the light source imaging plate 4, corresponding to Figure 4 S3 in.

[0055] S4: Turn the steering wheel of the vehicle to be tested to the limit position, corresponding to Figure 4 Specifically, the steering wheel of the vehicle to be tested may be turned left to the limit position to measure the minimum turning diameter of the vehicle to be tested; or the steering wheel of the vehicle to be tested may be turned right to the limit position to measure the minimum turning diameter of the vehicle to be tested.

[0056] S5: The optical sensor 2 is arranged on the connection block 32 of the connection device 3, that is, corresponding to Figure 4 S5 in.

[0057] S6: The base 31 of the connecting device 3 is set on the side of the outer front door of the vehicle to be tested, that is, Figure 4 Specifically, when the steering wheel of the vehicle to be tested is turned to the left to the extreme position through S5, the base 31 of the connecting device 3 is set on the side of the outer right front door of the vehicle to be tested through S7; when the steering wheel of the vehicle to be tested 2 is turned to the right to the extreme position through S5, the base 31 of the connecting device 3 is set on the side of the outer left front door of the vehicle to be tested through S7.

[0058] S7: Connect the optical sensor 2 to the cigarette lighter in the vehicle to be tested through a wire, corresponding to Figure 4 Specifically, the input end of the optical sensor 2 is connected to the output end of the cigarette lighter in the vehicle to be tested through a wire, so as to achieve the purpose of supplying power to the optical sensor 2 through the cigarette lighter in the vehicle to be tested during the operation of the system of the present invention. However, the way of supplying power to the optical sensor 2 is not limited to this.

[0059] S8: Power on, corresponding Figure 4Specifically, the switches of the power supply 1 of the light source imaging board 4, the photoelectric converter 5, the data acquisition instrument 6 and the computer 7 are turned on, and the vehicle to be tested is started so that the cigarette lighter in the vehicle to be tested can supply power to the optical sensor 2 through the wire.

[0060] S9: Adjust the angle of the light source emitted by the optical sensor 2 so that the light source emitted by the optical sensor 2 to the light source imaging plate 4 is directly opposite to the rear light source imaging plate 4 corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate 4 when the steering wheel is turned to the extreme position, that is, the corresponding Figure 4 S9 in the figure. Specifically, the angle of the light source emitted by the optical sensor 2 is adjusted by adjusting the connecting device 3. More specifically, the second connecting rod 35, the third connecting rod 36 and the fourth connecting rod 37 can be rotated and adjusted by the loose bolt 33, so that the light source emitted by the optical sensor 2 to the light source imaging plate 4 is directly opposite to the rear light source imaging plate 4 corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate 4 when the steering wheel is turned to the extreme position. The distance between the light source emitted by the optical sensor 2 to the light source imaging plate 4 and the aforementioned center point is not greater than the boundary value, and the boundary value is 2 mm.

[0061] S10: Control the steering wheel of the vehicle to be tested to remain at the limit position and control the vehicle to be tested to drive at a low speed, which corresponds to Figure 4 S10 in the embodiment. Specifically, while controlling the steering wheel of the vehicle to be tested to remain at the limit position, the vehicle to be tested is controlled to travel at a low speed on the optical imaging plate 4. The speed of the vehicle to be tested to travel at a low speed is controlled to be not less than 5 kilometers per hour and not more than 10 kilometers per hour, and the number of circles of the vehicle to be tested to travel at a low speed is controlled to be not less than one circle.

[0062] S11: The data of the minimum turning diameter of the vehicle to be tested is obtained through the computer 7 and displayed on the screen of the computer 7, that is, the corresponding Figure 4 Specifically, the data transmitted by the data acquisition device 6 is received by the computer 7 and displayed on the screen of the computer 7. At the same time, the diameter of the closed track circle left by the light source emitted by the optical sensor 2 displayed on the light source imaging board 4 is automatically calculated by the computer 7 according to the received data, that is, the minimum turning diameter of the vehicle to be tested.

[0063] The role and effect of implementation

[0064] The optical sensor 2 emits light to the light source imaging board 4; the light source imaging board 4 receives the light emitted by the optical sensor 2, and displays the moving track of the light source on the light source imaging board 4 according to the movement of the light source; the photoelectric converter 5 receives the potential change of the moving track of the light source on the light source imaging board 4, converts the optical signal into an electrical signal and transmits it to the data acquisition instrument 6; the data acquisition instrument 6 receives the electrical signal transmitted by the photoelectric converter 5 and processes the electrical signal, and transmits the processed data to the computer 7; the computer 7 receives the data transmitted by the data acquisition instrument 6 and displays it on the screen of the computer 7. That is, it can realize automatic and accurate acquisition of the data of the minimum turning diameter of the car, and at the same time, it provides preparation for the subsequent computer 7 software to calculate the minimum turning diameter of the car. In addition, this method is more intelligent than manual measurement.

[0065] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A data acquisition system for the minimum turning diameter of a vehicle, characterized in that: The device comprises a power supply (1), an optical sensor (2), a connecting device (3), a light source imaging board (4), a photoelectric converter (5), a data acquisition device (6) and a computer (7); the output end of the power supply (1) is respectively connected to the input end of the light source imaging board (4), the input end of the photoelectric converter (5), the input end of the data acquisition device (5) and the input end of the computer (7); the output end of the light source imaging board (4) is connected to the input end of the photoelectric converter (5); the output end of the photoelectric converter (5) is connected to the input end of the data acquisition device (6); the output end of the data acquisition device (6) is connected to the input end of the computer (7); and the optical sensor (2) is connected to the vehicle to be tested via the connecting device (3).

2. A data acquisition system for the minimum turning diameter of an automobile as claimed in claim 1, characterized in that: The optical sensor (2) emits light to the light source imaging board (4); the light source imaging board (4) displays the moving track of the light source; the photoelectric converter (5) receives the potential change of the moving track of the light source on the light source imaging board (4), converts the optical signal into an electrical signal and transmits it to the data acquisition instrument (6); the data acquisition instrument (6) receives the electrical signal transmitted by the photoelectric converter (5), processes the electrical signal, and transmits the processed data to the computer (7); the computer (7) receives the data transmitted by the data acquisition instrument (6) and displays it on the screen of the computer (7).

3. The data acquisition system for the minimum turning diameter of an automobile as claimed in claim 2, characterized in that: The light source emitted by the optical sensor (2) onto the light source imaging plate (4) is directly opposite to the rear light source imaging plate (4) corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate (4) when the steering wheel is turned to the extreme position.

4. A data acquisition system for the minimum turning diameter of an automobile as claimed in claim 3, characterized in that: The distance between the light source emitted by the optical sensor (2) onto the light source imaging plate (4) and the center point is not greater than a boundary value.

5. The data acquisition system for the minimum turning diameter of an automobile as claimed in claim 4, characterized in that: The limit value is 2 mm.

6. A connecting device (3) for a data acquisition system for a minimum turning diameter of an automobile as claimed in any one of claims 1 to 5, characterized in that: The connecting device (3) comprises a base (31), a connecting rod, a connecting block (32) and a bolt (33); one side of the base (31) is fixed on a car door; the other side of the base (31) is connected to one end of a first connecting rod (34); the other end of the first connecting rod (34) is hinged to one end of a second connecting rod (35); the other end of the second connecting rod (35) is hinged to one end of a third connecting rod (36); the other end of the third connecting rod (36) is hinged to one end of a fourth connecting rod (37); the other end of the fourth connecting rod (37) is connected to a connecting block (32); and the connecting block (32) is connected to an optical sensor (2).

7. A connecting device (3) according to claim 6, characterized in that: The first connecting rod (34) is fixed to the car door via a base (31); the rotating axis of the car door is the Z axis; the second connecting rod (35) rotates around the X axis; the third connecting rod (36) rotates around the Z axis; and the fourth connecting rod (37) rotates around the Y axis.

8. A method for acquiring data on the minimum turning diameter of an automobile as claimed in any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1: connecting the output end of the power supply (1) to the input end of the light source imaging board (4), the input end of the photoelectric converter (5), the input end of the data acquisition instrument (6) and the input end of the computer (7); S2: connecting the output end of the light source imaging plate (4) to the input end of the photoelectric converter (5), connecting the output end of the photoelectric converter (5) to the input end of the data acquisition device (6), and connecting the output end of the data acquisition device (6) to the input end of the computer (7); S3: driving the vehicle to be tested onto the light source imaging plate (4); S4: Turn the steering wheel of the vehicle to be tested to the extreme position; S5: placing the optical sensor (2) on the connection block (32) of the connection device (3); S6: placing the base (31) of the connecting device (3) on the side of the outer front door of the vehicle to be tested; S7: Connect the optical sensor (2) to the cigarette lighter of the vehicle to be tested via a wire; S8: Power on; S9: adjusting the angle of the light source emitted by the optical sensor (2) so that the light source emitted by the optical sensor (2) to the light source imaging plate (4) is directly facing the rear light source imaging plate (4) corresponding to the center point of the contact position between the tread of the outer front tire of the vehicle to be tested and the light source imaging plate (4) when the steering wheel is turned to the extreme position; S10: Control the steering wheel of the vehicle under test to remain at the limit position and control the vehicle under test to travel at a low speed; S11: The data of the minimum turning diameter of the vehicle to be tested is obtained through the computer (7) and displayed on the screen of the computer (7).

9. The method for acquiring data of the minimum turning diameter of an automobile as claimed in claim 8, characterized in that: When the steering wheel of the vehicle to be tested is turned to the left to the extreme position through S5, the base (31) of the connecting device (3) is set on the side of the outer right front door of the vehicle to be tested through S7; when the steering wheel of the vehicle to be tested is turned to the right to the extreme position through S5, the base (31) of the connecting device (3) is set on the side of the outer left front door of the vehicle to be tested through S7.

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