A motor vehicle braking performance detection system and its usage method

Abstract

The present application provides a motor vehicle braking performance testing system and a method for use. The motor vehicle braking performance testing system includes: a testing platform hinged to a supporting base through a fixedly connected rotating shaft, and carrying a motor vehicle to be tested; a lifting device connected to the testing platform, driving the testing platform to rotate and lift around the rotating shaft; a tension sensor is provided near the end of the testing platform that can be lifted and lowered, and its measuring part is connected to a pull rope for detachable connection with the motor vehicle to be tested; the testing platform is provided with an anti-slip strip that can extend out of the supporting surface, the input end of the fluid drive unit is connected to the rotating shaft, and the output end of the fluid drive unit drives the anti-slip strip to extend and slide. The motor vehicle braking performance testing system and method for use provided by the present application can complete the adjustment of the two structures of the testing platform and the anti-slip strip by only controlling the lifting device, which not only saves the time and labor costs of adjusting the detection scene, but also makes the detection scene more in line with the actual situation, making the detection results more accurate and reliable.

Description

Technical Field

[0001] The present application relates to the field of motor vehicle detection technology, and in particular to a motor vehicle braking performance detection system and a method for using the same. Background Art

[0002] Motor vehicle braking performance is a key component of vehicle performance and directly impacts traffic safety. Parking brake performance is a crucial aspect of vehicle braking performance, generally referring to the vehicle's braking performance on slopes. Conventional methods for testing parking brake performance typically rely on measuring vehicle speed and braking distance, which is generally suitable for flat or high-speed roads.

[0003] However, the above detection method is not suitable for simulating long-term parking situations (such as garage entrances and exits or traffic jams). In such situations, the vehicle's speed is very slow. If the speed or braking distance is measured, the data will be very small, making it difficult to accurately control the speed. Moreover, due to the slow speed, the braking distance will also be very short, making data collection more difficult. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a motor vehicle braking performance detection system that overcomes the above-mentioned problems or at least partially solves the above-mentioned problems.

[0005] Based on the above-mentioned purpose, the present application provides a motor vehicle braking performance detection system, including: a detection platform, a lifting device, a tension sensor, a fluid drive unit and an anti-slip strip; the detection platform is hinged to the load-bearing base through a fixedly connected rotating shaft, and is configured to carry the motor vehicle to be tested; the lifting device is connected to the detection platform, and is configured to drive the detection platform to rotate and lift around the rotating shaft; the tension sensor is arranged near the end of the detection platform that can be lifted and lowered, and the measuring part of the tension sensor is connected to a pull rope for detachable connection with the motor vehicle to be tested; the detection platform is provided with an anti-slip strip that can extend out of the load-bearing surface, the input end of the fluid drive unit is transmission-connected to the rotating shaft, and the output end of the fluid drive unit drives the anti-slip strip to extend and slide.

[0006] Optionally, the fluid drive unit includes a main drive cylinder, a transmission shaft, an actuator cylinder, a medium pipe and an air pipe; a drive piston is installed in the cylinder cavity of the main drive cylinder, the transmission shaft passes through the cylinder wall of the main drive cylinder and is sealed and rotatably connected to the cylinder wall, and the rotating shaft drives the drive piston to slide in the cylinder cavity through the transmission shaft; the drive piston divides the cylinder cavity into a medium cylinder cavity and an air cylinder cavity; the medium cylinder cavity is filled with a flowing medium and is connected to the actuator cylinder through the medium pipe; when the detection platform is raised, the drive piston compresses the medium cylinder cavity, and when the detection platform is lowered, the drive piston compresses the air cylinder cavity; the air cylinder cavity is connected to the outside world through the air pipe; the actuator cylinder is arranged below the bearing surface of the detection platform, and the piston rod of the actuator cylinder is fixedly connected to the anti-slip strip.

[0007] Optionally, the rotating shaft is equipped with a first gear, the part of the transmission shaft located outside the main drive cylinder is equipped with a second gear, the part located inside the main drive cylinder is equipped with a third gear, the driving piston is equipped with a rack, the first gear is engaged with the second gear, and the third gear is engaged with the rack.

[0008] Optionally, the third gear and the rack are both located in the medium cylinder cavity.

[0009] Optionally, a long groove capable of accommodating the anti-slip strip is provided at the upper end of the detection platform; the execution cylinder is arranged inside the detection platform and is integrally connected to the detection platform; a flow channel is also provided inside the detection platform, and the flow channel is respectively connected to the execution cylinder and the medium pipe.

[0010] Optionally, the detection platform is fixedly connected to an instrument bracket, the instrument bracket is equipped with a vertical screw and a guide rod, the screw is threadedly connected to a slide, the slide is slidingly connected to the guide rod, and the instrument bracket is also equipped with a drive motor for driving the screw to rotate; the tension sensor is installed on the slide.

[0011] Optionally, the motor vehicle braking performance testing system also includes an air guide rod arranged on the supporting base and / or the testing platform, an air duct is provided inside the air guide rod, and an air outlet of the air duct is installed with an air guide head facing the testing platform; the air duct is connected to the air cylinder cavity through a boost pipe, the boost pipe is installed with a first one-way valve, and the air pipe is installed with a second one-way valve.

[0012] Optionally, an atomizer is installed in the air duct near the air outlet, and the detection system also includes an atomizer pump, a delivery pipe and a water tank. The atomizer is connected to the output port of the atomizer pump through the delivery pipe, and the input port of the atomizer pump is connected to the water tank.

[0013] Optionally, the motor vehicle braking performance detection system further includes a refrigerator, and an output port of the refrigerator is connected to the air duct via a cold air pipe.

[0014] Based on the same inventive concept, the present application also provides a method for using a motor vehicle braking performance detection system, wherein the motor vehicle braking performance detection system is the aforementioned motor vehicle braking performance detection system, and the method for using the system comprises:

[0015] The lifting device drives the detection platform to rotate and rise around the rotating shaft to form a slope, and the anti-slip strip extends out of the detection platform synchronously with the rotation of the detection platform;

[0016] The pull rope is connected to the motor vehicle to be tested that is driven onto the testing platform;

[0017] The motor vehicle to be tested travels down the slope until the pull rope is tightened;

[0018] The parking brake of the motor vehicle to be tested is applied, and the value of the tension sensor is collected as an initial value;

[0019] After the value of the tension sensor is stable, collecting the value of the tension sensor as a final value;

[0020] Obtaining the difference between the final value and the initial value, and comparing it with a preset threshold to obtain a detection result;

[0021] Before the lifting device drives the detection platform to rotate and rise around the rotating shaft to form a slope, the method of use further includes:

[0022] The atomizing pump extracts water from the water tank to form pressurized water;

[0023] The pressurized water enters the atomizer through the delivery pipe and is sprayed out in the form of mist;

[0024] The air in the air cylinder cavity enters the air duct through the booster pipe, and drives the mist water to be sprayed toward the detection platform through the air guide head;

[0025] The method of use also includes:

[0026] The refrigerator generates low-temperature pressure gas;

[0027] The low-temperature pressure gas freezes the mist water to form snowflakes;

[0028] The low-temperature pressure gas drives the snowflakes to be sprayed from the wind guide head toward the detection platform.

[0029] As can be seen from the above, the motor vehicle braking performance testing system and method of use provided by the present application can, as needed, lift the testing platform to an appropriate height to form a slope with a suitable gradient. At the same time, the fluid drive unit can drive the anti-slip strips on the testing platform to extend synchronously during the process of the testing platform being raised, and the height at which the anti-slip strips extend from the bearing surface of the testing platform matches the gradient of the slope. The operator only needs to control the lifting device to complete the adjustment of the two structures, the testing platform and the anti-slip strips, while also ensuring that the protruding height of the anti-slip strips matches the gradient of the testing platform. This not only saves the time and labor costs of adjusting and setting up the testing scene, but also makes the testing scene more in line with the actual situation, making the test results more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 A schematic diagram of a motor vehicle braking performance detection system according to an embodiment of the present application;

[0032] Figure 2 for Figure 1 Enlarged view of part A;

[0033] Figure 3 for Figure 1 Enlarged view of part B;

[0034] Figure 4 A top sectional view of a motor vehicle braking performance detection system according to an embodiment of the present application;

[0035] Figure 5 for Figure 4 A partial enlarged view of the

[0036] Figure 6 This is a schematic diagram of equipment for simulating rain and snow in a motor vehicle braking performance testing system according to an embodiment of the present application;

[0037] Figure 7 This is a flow chart of a method for using the motor vehicle braking performance detection system according to an embodiment of the present application;

[0038] Figure 8 A flowchart simulating rainy days for a method of using the motor vehicle braking performance testing system according to an embodiment of the present application;

[0039] Figure 9This is a flowchart of a simulated snowy day method for using the motor vehicle braking performance detection system according to an embodiment of the present application. Description of the drawings:

[0041] 1. Detection platform; 1-1. Load-bearing surface; 1-2. Long groove; 1-3. Flow channel; 1-4. Rotating shaft; 1-5. First gear;

[0042] 2. Lifting device;

[0043] 3. Tension sensor; 3-1. Pull rope;

[0044] 4. Master drive cylinder; 4-1. Drive piston; 4-2. Medium cylinder chamber; 4-3. Air cylinder chamber; 4-4. Rack; 4-5. Medium pipe; 4-6. Air pipe; 4-6-1. Second one-way valve;

[0045] 5. Transmission shaft; 5-1. Second gear; 5-2. Third gear;

[0046] 6. Actuator cylinder; 6-1. Piston rod;

[0047] 7. Anti-slip strips; 8. Motor vehicle to be tested;

[0048] 9. Instrument bracket; 9-1. Screw; 9-2. Guide rod; 9-3. Slide; 9-4. Drive motor;

[0049] 10. Wind guide rod; 10-1. Air duct; 10-2. Wind guide head;

[0050] 11. Booster pipe; 11-1. First one-way valve;

[0051] 12. Atomizer; 13. Delivery pipe; 14. Atomizing pump; 15. Water tank; 16. Refrigerator; 17. Air conditioning pipe;

[0052] 18. Carrying base; 18-1. First groove; 18-2. Second groove. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0054] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0055] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0056] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0057] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] The applicant's research has discovered that for the aforementioned long-term parking simulation test, if a vehicle parked on a slope moves or shows a tendency to move, it will generate a downward force acting on the slope. This force can be captured by a tension sensor, enabling the long-term parking test. Specifically, after the vehicle is parked on a slope, the force sensor records the period from the start of parking brake application until the value displayed on the tension sensor stops changing. The change in tension during this period can be used to assess the effectiveness of the parking brake.

[0059] However, the detection equipment in the related art can only simulate the parking scene on a flat slope, and its function is relatively simple. It cannot simulate the detection of slope sections with speed bumps (in some cases, speed bumps with different raised heights are set according to the slope).

[0060] In view of this, if Figure 1 、 Figure 2 and Figure 3As shown, an embodiment of the present application provides a motor vehicle braking performance detection system, including: a detection platform 1, a lifting device 2, a tension sensor 3, a fluid drive unit and an anti-slip strip 7; the detection platform 1 is hinged to the supporting base 18 through a fixedly connected rotating shaft 1-4, and is configured to carry the motor vehicle 8 to be tested; the lifting device 2 is connected to the detection platform 1, and is configured to drive the detection platform 1 to rotate and lift around the rotating shaft 1-4; a tension sensor 3 is arranged near the end of the detection platform 1 that can be lifted and lowered, and the measuring part of the tension sensor 3 is connected to a pull rope 3-1 for detachable connection with the motor vehicle 8 to be tested; the detection platform 1 is provided with an anti-slip strip 7 that can extend out of the bearing surface 1-1, the input end of the fluid drive unit is transmission-connected to the rotating shaft 1-4, and the output end of the fluid drive unit drives the anti-slip strip 7 to extend and slide.

[0061] Optionally, the supporting base 18 is a cement structure, a steel frame structure or a foundation. Figure 1 As shown, in the detection system of this embodiment, the supporting base 18 is a foundation. The foundation is provided with a first groove 18-1 for accommodating the detection platform 1. When the detection platform 1 is in a horizontal state, it is placed in the first groove 18-1, and its supporting surface 1-1 is flush with the ground.

[0062] Optionally, the bottom of the first slot 18-1 is further provided with a second slot 18-2 for accommodating the lifting device 2. In the detection system of this embodiment, the lifting device 2 is a hydraulic rod, the end of the fixed portion of the hydraulic rod is hinged to the bottom of the second slot 18-2, and the end of the telescopic portion of the hydraulic rod is hinged to the detection platform 1.

[0063] Optionally, a parking area is provided on the detection platform 1, and a plurality of anti-slip strips 7 are arranged in parallel and spaced apart in the parking area, and the extending direction of the anti-slip strips 7 is in the same direction as the driving direction of the motor vehicle 8 to be tested ( Figure 1 In the process of performing brake detection using the detection system of this embodiment, the motor vehicle 8 to be tested is located in the parking area.

[0064] Optionally, the fluid driving unit is a pneumatic system or a hydraulic system. In the detection system of this embodiment, since the detection platform 1 and the anti-slip strip 7 need to be raised and lowered synchronously, a pressure system with a more sensitive and reliable response is selected.

[0065] Optionally, a hook or a lock is provided at one end of the pull rope 3 - 1 connected to the motor vehicle 8 to be tested.

[0066] During use, the lifting device 2 is first activated, pushing the testing platform 1 to rotate and rise about the rotation axis 1-4 to form a slope. During this process, the anti-slip strips 7 on the testing platform 1 are simultaneously extended from the supporting surface 1-1 of the testing platform 1 under the action of the fluid drive unit. When the testing platform 1 reaches the preset slope, the lifting device 2 stops, and the testing platform 1 and the anti-slip strips 7 remain in their current positions.

[0067] After the test platform 1 is adjusted, the motor vehicle 8 to be tested is driven onto the test platform 1 and parked near the tension sensor 3. The pull rope 3-1 is reliably connected to the motor vehicle 8 to be tested. After the connection is completed, the motor vehicle 8 to be tested is started and driven down the slope until the pull rope 3-1 is tightened. The value displayed by the tension sensor 3 increases as the motor vehicle 8 to be tested moves. At this time, the motor vehicle 8 to be tested is parked and the test is started. The value of the tension sensor 3 at this moment is recorded as the initial value. If the motor vehicle 8 to be tested moves or shows a tendency to move after the parking brake is applied, the value of the tension sensor 3 will continue to increase. After the value of the tension sensor 3 stabilizes and remains unchanged, this value is recorded as the final value. The difference between the final value and the initial value is obtained and compared with the pre-specified standard value to obtain the final test result.

[0068] The motor vehicle braking performance testing system proposed in this embodiment can, as needed, lift the testing platform 1 to an appropriate height to form a slope with a suitable gradient. At the same time, the fluid drive unit can drive the anti-slip strip 7 on the testing platform 1 to extend synchronously during the lifting process of the testing platform 1, and the height of the anti-slip strip 7 extending from the bearing surface 1-1 of the testing platform 1 matches the gradient of the slope. The operator only needs to control the lifting device 2 to complete the adjustment of the two structures of the testing platform 1 and the anti-slip strip 7, while also ensuring that the protruding height of the anti-slip strip 7 matches the gradient of the testing platform 1. This not only saves the time and labor costs of adjusting and setting up the testing scene, but also makes the testing scene more in line with the actual situation, making the test results more accurate and reliable.

[0069] like Figure 2 、 Figure 4 and Figure 5 As shown, in some embodiments, the fluid drive unit includes a main drive cylinder 4, a transmission shaft 5, an actuator cylinder 6, a medium pipe 4-5 and an air pipe 4-6; a drive piston 4-1 is installed in the cylinder cavity of the main drive cylinder 4, the transmission shaft 5 passes through the cylinder wall of the main drive cylinder 4 and is sealed and rotatably connected to the cylinder wall, and the rotating shaft 1-4 drives the drive piston 4-1 to slide in the cylinder cavity through the transmission shaft 5; the drive piston 4-1 divides the cylinder cavity into a medium cylinder cavity 4-2 and an air cylinder cavity 4-3; the medium cylinder cavity 4-2 is filled with a flowing medium and is connected to the actuator cylinder 6 through the medium pipe 4-5; when the detection platform 1 is raised, the drive piston 4-1 compresses the medium cylinder cavity 4-2, and when the detection platform 1 is lowered, the drive piston 4-1 compresses the air cylinder cavity 4-3; the air cylinder cavity 4-3 is connected to the outside world through the air pipe 4-6; the actuator cylinder 6 is arranged below the bearing surface 1-1 of the detection platform 1, and the piston rod 6-1 of the actuator cylinder 6 is fixedly connected to the anti-slip strip 7.

[0070] Optionally, the flow medium is water or hydraulic oil.

[0071] When the lifting mechanism 2 propels the inspection platform 1 to rotate and rise, the rotating shaft 1-4, which is fixed to the inspection platform 1, also rotates. The rotating shaft 1-4 transmits the rotational motion to the transmission shaft 5, which then converts the rotational motion into linear motion, driving the drive piston 4-1 to slide within the cylinder cavity of the master drive cylinder 4.

[0072] The transmission process of the rotational motion between the rotating shaft 1-4 and the transmission shaft 5 can be realized by a gear transmission structure or a synchronous belt transmission structure. The transmission process of the rotational motion to the linear motion between the transmission shaft 5 and the driving piston 4-1 can be realized by a gear rack structure or a screw nut pair.

[0073] When the inspection platform 1 is raised, the drive piston 4-1, working in concert with the rotating shaft 1-4 and the transmission shaft 5, slides toward the medium cylinder chamber 4-2, compressing it. The fluid within the medium cylinder chamber 4-2 enters the actuator cylinder 6 through the medium pipe 4-5. Driven by the incoming fluid, the piston rod 6-1 of the actuator cylinder 6 extends outward, driving the anti-slip strip 7 to extend from the bearing surface 1-1 of the inspection platform 1. This ensures that the anti-slip strip 7 extends synchronously with the rise of the inspection platform 1, and the extension height of the anti-slip strip 7 corresponds to the slope of the inspection platform 1.

[0074] Similarly, when lifting mechanism 2 retracts, inspection platform 1 rotates and descends, driving piston 4-1 to slide toward air chamber 4-3, compressing it. The fluid in actuator cylinder 6, under vacuum suction, flows back through medium pipe 4-5 into medium chamber 4-2. Piston rod 6-1 of actuator cylinder 6 retracts, driving anti-slip strip 7 downward.

[0075] like Figure 4 and Figure 5 As shown, in some embodiments, the rotating shaft 1-4 is installed with a first gear 1-5, the part of the transmission shaft 5 located outside the main drive cylinder 4 is installed with a second gear 5-1, the part located inside the main drive cylinder 4 is installed with a third gear 5-2, the driving piston 4-1 is installed with a rack 4-4, the first gear 1-5 is engaged with the second gear 5-1, and the third gear 5-2 is engaged with the rack 4-4.

[0076] Optionally, in the detection system of this embodiment, the main drive cylinder 4 is arranged in the foundation and close to the rotating shaft 1-4. Therefore, a gear transmission structure with simple structure and reliable transmission is selected between the rotating shaft 1-4 and the transmission shaft 5.

[0077] Optionally, the diameter of the first gear 1-5 is larger than that of the second gear 5-1, and the transmission ratio between the first gear 1-5 and the second gear 5-1 is greater than 1. The transmission ratio between the first gear 1-5 and the second gear 5-1 can be determined according to the rotation angle of the detection platform 1 and the lifting stroke of the anti-slip strip 7.

[0078] like Figure 5As shown, in some embodiments, the third gear 5-2 and the rack 4-4 are both located in the medium cylinder cavity 4-2.

[0079] The rack 4-4 is fixedly connected to the drive piston 4-1 and is located on the side wall of the drive piston 4-1 facing the medium cylinder chamber 4-2. The rack 4-4 extends parallel to the axis of the main drive cylinder 8. During the sliding of the drive piston 4-1, the rack 4-4 and the third gear 5-2 remain meshed.

[0080] like Figure 2 and Figure 4 As shown, in some embodiments, the upper end of the detection platform 1 is provided with a long groove 1-2 that can accommodate the anti-slip strip 7; the execution cylinder 6 is arranged inside the detection platform 1 and is integrally connected to the detection platform 1; the detection platform 1 is also provided with a flow channel 1-3, and the flow channel 1-3 is respectively connected to the execution cylinder 6 and the medium pipe 4-5.

[0081] When the bearing surface 1-1 of the inspection platform 1 is horizontal, the anti-slip strip 7 is placed in the long groove 1-2, and the top of the anti-slip strip 7 is flush with or lower than the bearing surface 1-1 of the inspection platform 1. When the inspection platform 1 is rotated and raised, the anti-slip strip 7 is pushed by the piston rod 6-1 of the actuator cylinder 6 and gradually extends out of the long groove 1-2.

[0082] Optionally, the execution cylinder 6 is located below the long slot 1 - 2 , and the axis of the execution cylinder 6 is perpendicular to the bearing surface 1 - 1 .

[0083] Optionally, one or more actuator cylinders 6 are provided below each anti-slip strip 7. In other words, each anti-slip strip 7 can be driven by one piston rod 6-1 or by multiple piston rods 6-1.

[0084] The actuator cylinder 6 and the detection platform 1 are designed as an integrally formed structure, and flow channels 1-3 are provided in the detection platform 1 for the reciprocating flow of the flowing medium. On the one hand, this can make the detection system structure of this embodiment compact, and on the other hand, it can effectively reduce leakage of the fluid drive unit, help improve its reliability, and reduce maintenance frequency and difficulty.

[0085] like Figure 3 As shown, in some embodiments, the detection platform 1 is fixedly connected to an instrument bracket 9, the instrument bracket 9 is installed with a vertical screw 9-1 and a guide rod 9-2, the screw 9-1 is threadedly connected to a slide 9-3, the slide 9-3 is slidingly connected to the guide rod 9-2, and the instrument bracket 9 is also installed with a drive motor 9-4 for driving the screw 9-1 to rotate; the tension sensor 3 is installed on the slide 9-3.

[0086] After the pull rope 3-1 is connected to the motor vehicle 8 to be tested, if the pull rope 3-1 is parallel to the bearing surface 1-1, the tension value collected by the tension sensor 3 is equal to the force generated by the movement of the motor vehicle 8 to be tested; if the pull rope 3-1 is at a certain angle to the bearing surface 1-1, the tension value collected by the tension sensor 3 is the component value of the force generated by the movement of the motor vehicle 8 to be tested.

[0087] To simplify the testing process, the height of the measuring portion of the tension sensor 3 must be consistent with the height of the connection point of the pull rope 3-1 of the vehicle under test 8. The connection point of the pull rope 3-1 may be at different heights for different vehicles under test 8, necessitating that the tension sensor 3 be height-adjustable.

[0088] To achieve the above functions, the detection system of this embodiment is provided with a vertical screw 9-1, which is connected to the output shaft of the drive motor 9-4 and serves as the driving portion for adjusting the height of the tension sensor 3. The vertically arranged guide rod 9-2 serves as the guide limiter. The slide 9-3 carries the tension sensor 3 and serves as the execution portion. When the tension sensor 3 needs to be adjusted, the drive motor 9-4 drives the screw 9-1 to rotate. The rotating screw 9-1 generates an upward or downward driving force on the slide 9-3, causing the slide 9-3 to rise or fall vertically along the guide rod 9-2.

[0089] In order to simulate the slope section in windy, rainy, snowy and other weather conditions, the detection system of this embodiment is further provided with the following structure.

[0090] like Figure 1 、 Figure 5 and Figure 6 As shown, the detection system of this embodiment also includes an air guide rod 10 arranged on the supporting base 18 and / or the detection platform 1, and an air duct 10-1 is provided inside the air guide rod 10, and the air outlet of the air duct 10-1 is equipped with an air guide head 10-2 facing the detection platform 1; the air duct 10-1 is connected to the air cylinder chamber 4-3 through a boost pipe 11, and the boost pipe 11 is equipped with a first one-way valve 11-1, and the air pipe 4-6 is equipped with a second one-way valve 4-6-1.

[0091] Optionally, in the detection system of this embodiment, the wind guide rod 10 is arranged on the bearing base 18, and the wind guide head 10-2 is always located above the detection platform 1.

[0092] Optionally, a plurality of wind guide rods 10 are provided and are spaced apart along the travel direction of the motor vehicle 8 to be tested.

[0093] Optionally, the air outlet of the air guide head 10 - 2 faces the parking area of the detection platform 1 .

[0094] In order to simulate a strong wind environment, a wind guide rod 10 capable of blowing wind toward the detection platform 1 is provided.

[0095] As can be seen from the foregoing, when the testing platform 1 rotates and rises, the driving piston 4-1 squeezes the medium cylinder chamber 4-2, expanding the space in the air cylinder chamber 4-3. Under the action of vacuum suction, outside air is drawn into the air cylinder chamber 4-3 through the air pipe 4-6. (Due to the shutoff effect of the first one-way valve 11-1 on the boost pipe 11, outside air cannot be drawn into the air cylinder chamber 4-3 through the air guide rod 10 at this time.)

[0096] When the detection platform 1 rotates and descends, the driving piston 4-1 squeezes the air cylinder chamber 4-3. At this time, the air in the air cylinder chamber 4-3 cannot be discharged to the outside from the air pipe 4-6 due to the cut-off effect of the second one-way valve 4-6-1. It can only enter the air duct 10-1 through the booster pipe 11 and finally be blown toward the detection platform 1 by the air guide head 10-2.

[0097] like Figure 6 As shown, in some embodiments, an atomizer 12 is also installed near the air outlet in the air duct 10-1, and the detection system also includes an atomizer pump 14, a delivery pipe 13 and a water tank 15. The atomizer 12 is connected to the output port of the atomizer pump 14 through the delivery pipe 13, and the input port of the atomizer pump 14 is connected to the water tank 15.

[0098] When testing a sloped road section simulated in rainy weather is required, atomizing pump 14 is activated. It draws water from water tank 15 and pressurizes it to deliver pressurized water. The pressurized water enters atomizer 12 through delivery pipe 13 and is ultimately sprayed out as atomized water. Driven by the flowing air in air duct 10-1, the atomized water is sprayed toward testing platform 1 through air guide 10-2, simulating a sloped road section in rainy weather.

[0099] Of course, if it is necessary to simulate a slope section with different precipitation amounts, the output power of the atomizing pump 14 can be adjusted.

[0100] like Figure 6 As shown, the detection system of this embodiment further includes a refrigerator 16 and a cold air pipe 17 , and the output port of the refrigerator 16 is connected to the air duct 10 - 1 through the cold air pipe 17 .

[0101] When it is necessary to simulate a snowy slope section for inspection, the refrigerator 16 is turned on. The refrigerator 16 delivers low-temperature pressure air into the air duct 10-1 of the wind guide rod 10. The atomized water condenses into snowflakes after encountering the low-temperature pressure air. The snowflakes are driven by the flowing air and are sprinkled toward the inspection platform 1 by the wind guide head 10-2, thereby simulating a snowy slope section.

[0102] Based on the same inventive concept and combined with the description of the motor vehicle braking performance detection system of each of the above embodiments, this embodiment provides a method for using the motor vehicle braking performance detection system. This method has the corresponding technical effects of the motor vehicle braking performance detection system of each of the above embodiments, which will not be repeated here.

[0103] like Figure 7 Said method comprises the following steps:

[0104] In step 101 , the lifting device 2 drives the detection platform 1 to rotate and rise around the rotation axis 1 - 4 to form a slope, and the anti-slip strip 7 extends out of the detection platform 1 synchronously with the rotation of the detection platform 1 .

[0105] Step 102 : The pull rope 3 - 1 is connected to the motor vehicle 8 to be tested that has driven onto the testing platform 1 .

[0106] Step 103: The motor vehicle 8 to be tested travels down the slope until the pull rope 3-1 is tightened.

[0107] In step 104 , the motor vehicle 8 to be tested is parked and braked, and the value of the tension sensor 3 is collected as an initial value.

[0108] Step 105 : After the value of the tension sensor 3 is stabilized, the value of the tension sensor 3 is collected as the final value.

[0109] Step 106: Obtain the difference between the final value and the initial value, and compare it with a preset threshold to obtain a detection result.

[0110] like Figure 8 When simulating a sloped road surface in rainy weather, before step S101, the following steps are also included:

[0111] In step 201 , the atomizing pump 14 extracts water from the water tank 15 to form pressurized water.

[0112] In step 202, pressurized water enters the atomizer 12 through the delivery pipe 13 and is sprayed out in the form of mist.

[0113] In step 203 , the air in the air cylinder chamber 4 - 3 enters the air duct 10 - 1 through the booster pipe 11 , and drives the mist water to be sprayed toward the detection platform 1 through the air guide head 10 - 2 .

[0114] like Figure 9 When simulating a snowy slope road surface, in addition to the above steps 201 to 203, the following steps are further included:

[0115] In step 301 , the refrigerator 16 generates low-temperature pressure gas.

[0116] Step 302: Low-temperature pressure gas freezes mist water to form snowflakes.

[0117] Step 303 , the low-temperature pressure gas drives the snowflakes to be sprayed toward the detection platform 1 through the wind guide head 10 - 2 .

[0118] It should be noted that the above description is limited to some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0119] The various embodiments in this application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0120] The description of this application is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the application and to enable those skilled in the art to understand the application and design various embodiments with various modifications suitable for specific applications.

[0121] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0122] While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0123] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A motor vehicle braking performance detection system, characterized in that: include: Detection platform, lifting device, tension sensor, fluid drive unit and anti-slip strips; The detection platform is hinged to the bearing base via a fixedly connected rotating shaft and is configured to carry the motor vehicle to be tested; the lifting device is connected to the detection platform and is configured to drive the detection platform to rotate and lift around the rotating shaft; the tension sensor is provided near the end of the detection platform that can be raised and lowered, and the measuring portion of the tension sensor is connected to a pull rope for detachable connection with the motor vehicle to be tested; the detection platform is provided with an anti-slip strip that can extend from the bearing surface, the input end of the fluid drive unit is in transmission connection with the rotating shaft, and the output end of the fluid drive unit drives the anti-slip strip to extend and slide; The fluid drive unit includes a main drive cylinder, a transmission shaft, an actuator cylinder, a medium pipe and an air pipe; A driving piston is installed in the cylinder cavity of the master driving cylinder, the transmission shaft passes through the cylinder wall of the master driving cylinder and is in sealed rotation connection with the cylinder wall, and the rotating shaft drives the driving piston to slide in the cylinder cavity through the transmission shaft; The drive piston divides the cylinder chamber into a medium cylinder chamber and an air cylinder chamber; the medium cylinder chamber is filled with a flowing medium and is connected to the actuator cylinder through the medium pipe; when the detection platform is raised, the drive piston compresses the medium cylinder chamber, and when the detection platform is lowered, the drive piston compresses the air cylinder chamber; the air cylinder chamber is connected to the outside through the air pipe; The execution cylinder is arranged below the bearing surface of the detection platform, and the piston rod of the execution cylinder is fixedly connected to the anti-slip strip; The detection platform is fixedly connected to an instrument bracket, the instrument bracket is equipped with a vertical screw and a guide rod, the screw is threadedly connected to a slide, the slide is slidably connected to the guide rod, and the instrument bracket is also equipped with a drive motor for driving the screw to rotate; the tension sensor is installed on the slide; The apparatus further comprises an air guide rod disposed on the supporting base and / or the detection platform, wherein an air duct is provided inside the air guide rod, and an air outlet of the air duct is provided with an air guide head facing the detection platform; the air duct is connected to the air cylinder cavity via a booster pipe, the booster pipe is provided with a first one-way valve, and the air pipe is provided with a second one-way valve; An atomizer is further installed in the air duct near the air outlet, and the detection system further includes an atomizer pump, a delivery pipe and a water tank, the atomizer is connected to the output port of the atomizer pump through the delivery pipe, and the input port of the atomizer pump is connected to the water tank; It also includes a refrigerator, and the output port of the refrigerator is connected to the air duct through a cold air pipe.

2. The motor vehicle braking performance detection system according to claim 1, characterized in that: The rotating shaft is equipped with a first gear, the portion of the transmission shaft located outside the main drive cylinder is equipped with a second gear, the portion located inside the main drive cylinder is equipped with a third gear, the driving piston is equipped with a rack, the first gear is engaged with the second gear, and the third gear is engaged with the rack.

3. The motor vehicle braking performance detection system according to claim 2, characterized in that: The third gear and the rack are both located in the medium cylinder cavity.

4. The motor vehicle braking performance detection system according to claim 1, characterized in that: The upper end of the detection platform is provided with a long groove capable of accommodating the anti-slip strip; the execution cylinder is arranged inside the detection platform and is integrally connected to the detection platform; a flow channel is also provided inside the detection platform, and the flow channel is respectively connected to the execution cylinder and the medium pipe.

5. A method for using a motor vehicle braking performance detection system, characterized in that: The motor vehicle braking performance detection system is the motor vehicle braking performance detection system according to any one of claims 1 to 4, and the method of use comprises: The lifting device drives the detection platform to rotate and rise around the rotating shaft to form a slope, and the anti-slip strip extends out of the detection platform synchronously with the rotation of the detection platform; The pull rope is connected to the motor vehicle to be tested that is driven onto the testing platform; The motor vehicle to be tested travels down the slope until the pull rope is tightened; The parking brake of the motor vehicle to be tested is applied, and the value of the tension sensor is collected as an initial value; After the value of the tension sensor is stable, collecting the value of the tension sensor as a final value; Obtaining the difference between the final value and the initial value, and comparing it with a preset threshold to obtain a detection result; Before the lifting device drives the detection platform to rotate and rise around the rotating shaft to form a slope, the method further includes: The atomizing pump extracts water from the water tank to form pressurized water; The pressurized water enters the atomizer through the delivery pipe and is sprayed out in the form of mist; The air in the air cylinder cavity enters the air duct through the booster pipe, and drives the mist water to be sprayed toward the detection platform through the air guide head; Also includes: The refrigerator generates low-temperature pressure gas; The low-temperature pressure gas freezes the mist water to form snowflakes; The low-temperature pressure gas drives the snowflakes to be sprayed from the wind guide head toward the detection platform.

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