ASR Detection Method

Abstract

The present invention discloses an ASR detection method, which includes moving a vehicle to be tested onto a test stand, and making the left and right wheels of the vehicle to be tested respectively located on a first roller and a second roller; starting the vehicle to be tested and accelerating so that the vehicle to be tested drives the first roller and the second roller to rotate respectively through the left and right wheels; providing resistance to the first roller or the second roller through a resistance mechanism so that the first roller or the second roller stops rotating; detecting a first speed of the first roller through a first vehicle speed sensor, and detecting a second speed of the second roller through a second vehicle speed sensor; and determining the effectiveness of the ASR performance of the vehicle to be tested based on the first speed and the second speed. The resistance mechanism provides resistance to the first roller or the second roller to simulate a slipping condition, and the speeds of the first roller and the second roller are detected through the first vehicle speed sensor and the second vehicle speed sensor to detect whether the ASR system of the vehicle to be tested is effective, thereby realizing the ASR performance effectiveness detection of the vehicle to be tested.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, and in particular to an ASR detection method. Background Art

[0002] Automobile ASR (Acceleration Slip Regulation) refers to an electronically controlled anti-skid system, which is used to prevent the driving wheels from slipping during driving, especially on asymmetric roads or when turning, so as to improve the directional stability, steering control ability and acceleration performance of the car during driving, and reduce tire wear and engine fuel consumption.

[0003] In order to ensure that the ASR function of the car is normal, it is necessary to test the ASR performance of the car. At present, there is no testing equipment on the market that can independently test the ASR function of the car. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an ASR detection method, which can detect the effectiveness of the ASR performance of a car.

[0005] According to an ASR detection method of an embodiment of the present invention, applied to an ASR detection device, the ASR detection device includes a stand, a first roller, a second roller and a resistance mechanism, the first roller and the second roller are rotatably mounted on the stand respectively, a first vehicle speed sensor is mounted on the first roller, a second vehicle speed sensor is mounted on the second roller, the resistance mechanism is connected to a coupling, and is connected to the first roller or the second roller through the coupling, the method includes:

[0006] Moving the vehicle to be tested onto the platform, and placing the left and right wheels of the vehicle to be tested on the first roller and the second roller respectively;

[0007] Starting the vehicle to be tested and accelerating it so that the vehicle to be tested drives the first roller and the second roller to rotate respectively through the left and right wheels;

[0008] Providing resistance to the first roller or the second roller by the resistance mechanism so as to stop the first roller or the second roller from rotating;

[0009] detecting a first speed of the first roller by the first vehicle speed sensor, and detecting a second speed of the second roller by the second vehicle speed sensor;

[0010] The effectiveness of the ASR performance of the vehicle to be tested is determined based on the first speed and the second speed.

[0011] The ASR detection method according to the embodiment of the present invention has at least the following beneficial effects:

[0012] During the test, the left and right wheels of the vehicle to be tested are respectively located on the first roller and the second roller. The rotation of the left and right wheels of the vehicle to be tested drives the first roller and the second roller to rotate. The resistance mechanism provides resistance to the first roller or the second roller to simulate a slipping condition. The speeds of the first roller and the second roller are detected by the first vehicle speed sensor and the second vehicle speed sensor to detect whether the ASR system of the vehicle to be tested is effective, thereby realizing the ASR performance effectiveness detection of the vehicle to be tested.

[0013] According to some embodiments of the present invention, the ASR detection device further includes a braking mechanism, and before moving the vehicle to be tested onto the test stand, the device further includes:

[0014] The first roller and the second roller are braked by the brake mechanism.

[0015] According to some embodiments of the present invention, before starting the vehicle to be tested and accelerating, the method further includes:

[0016] The braking mechanism brakes the first rolling element and the second rolling element.

[0017] According to some embodiments of the present invention, before providing resistance to the first roller or the second roller through the resistance mechanism, the method further includes:

[0018] The speed of the vehicle to be tested is increased to 20±3 km / h.

[0019] According to some embodiments of the present invention, the resistance mechanism adopts an eddy current motor.

[0020] According to some embodiments of the present invention, the output power of the eddy current motor is greater than or equal to 160 kW, and the eddy current motor outputs resistance in a constant voltage manner.

[0021] According to some embodiments of the present invention, a force sensor is installed on the resistance mechanism.

[0022] According to some embodiments of the present invention, the force sensor is an S-type sensor or a torque sensor.

[0023] According to some embodiments of the present invention, the friction coefficient of the first roller and the second roller is greater than or equal to 0.7.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a flowchart of the steps of the ASR detection method according to an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of an ASR detection device according to an embodiment of the present invention;

[0028] Figure 3 FIG. 4 is a diagram showing the relationship between speed and time of the ASR detection method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, "several" means one or more, "multiple" means more than two, greater than, less than, and exceeding are understood as not including the number itself, and "above", "below", and "within" are understood as including the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, words such as “setting”, “installation” and “connection” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention based on the specific content of the technical solution.

[0033] Please refer to Figure 1 This embodiment discloses an ASR detection method including steps S100 to S500. The ASR detection method of this embodiment is applied to an ASR detection device. Please refer to Figure 2The ASR detection device includes a stand 100, a first roller 200, a second roller 300 and a resistance mechanism 500. The first roller 200 and the second roller 300 are rotatably mounted on the stand 100, respectively. The first roller 200 is mounted with a first vehicle speed sensor 210, the second roller 300 is mounted with a second vehicle speed sensor 310, and the resistance mechanism 500 is connected with a coupling 510 and connected to the first roller 200 or the second roller 300 through the coupling 510. The details of each step are discussed below:

[0034] S100, moving the vehicle to be tested onto the platform 100, and placing the left and right wheels of the vehicle to be tested on the first roller 200 and the second roller 300 respectively.

[0035] The movement modes of the vehicle to be tested include but are not limited to the following modes:

[0036] In the first mode, the vehicle to be tested is driven onto the test stand 100 by the test personnel in the start-up state. In this mode, in order to prevent the free rolling of the first roller 200 and the second roller 300 from affecting the movement of the vehicle to be tested, the ASR testing device further includes a braking mechanism 400, which can be brake-connected to the first roller 200 and the second roller 300, respectively. In this way, before step S100, the following is further included:

[0037] S110 , braking the first roller 200 and the second roller 300 through the braking mechanism 400 .

[0038] In this case, the brake mechanism 400 locks the first roller 200 and the second roller 300, and the first roller 200 and the second roller 300 cannot roll freely, thereby providing sufficient static friction for the vehicle to be tested, so that the vehicle to be tested can be moved to a suitable position. Of course, in some application examples, the brake mechanism 400 can be an external component relative to the ASR detection device, that is, the ASR detection device and the brake mechanism 400 are two independent devices, which can be configured or disassembled according to the needs of the user, which is conducive to improving the flexibility of use.

[0039] In the second way, the vehicle to be tested can be placed on a mobile platform and moved to the stand 100 by the mobile platform. In this case, it is not necessary to consider the influence of the rolling of the first roller 200 and the second roller 300 on the movement of the vehicle to be tested.

[0040] It should be known that, in order to detect the effectiveness of the ASR performance of the vehicle, the vehicle to be tested in this embodiment refers to a vehicle equipped with an ASR system, and for a vehicle not equipped with an ASR system, the detection result is that the ASR system fails. Among them, the left and right wheels of the vehicle to be tested involved in this embodiment refer to the wheels that can provide power to the vehicle and are controlled by the ASR system of the vehicle to be tested. For example, for a front-wheel drive vehicle, the left and right wheels of the vehicle to be tested refer to the left and right front wheels, for a rear-wheel drive vehicle, the left and right wheels of the vehicle to be tested refer to the left and right rear wheels, and for a four-wheel drive vehicle, the detection can be performed in the manner of a front-wheel drive vehicle and a rear-wheel drive vehicle, respectively.

[0041] In order to adapt to the wheel sizes of different vehicles, the number of the first roller 200 and the second roller 300 can be one or more, for example, Figure 2 The number of the first rollers 200 and the second rollers 300 shown in the figure are both three, and the three first rollers 200 are arranged side by side, wherein the middle first roller 200 is equipped with a first vehicle speed sensor 210, and the second rollers 300 are arranged in the same manner as the first rollers 200, wherein the middle second roller 300 is connected to the resistance mechanism 500 via a coupling 510. Of course, the resistance mechanism 500 can be connected to the first roller 200 via the coupling 510.

[0042] S200, starting the vehicle to be tested and accelerating it, so that the vehicle to be tested drives the first roller 200 and the second roller 300 to rotate through the left and right wheels respectively.

[0043] The function of the vehicle ASR system is to prevent the vehicle from slipping during acceleration. Therefore, when conducting the test, the vehicle to be tested needs to be started and accelerated to simulate the vehicle's driving or acceleration. When the vehicle to be tested accelerates, since the first roller 200 and the second roller 300 are in a free rolling state, the left and right wheels of the vehicle to be tested can respectively drive the first roller 200 and the second roller 300 to rotate, and in the absence of external force, the rotation speeds of the first roller 200 and the second roller 300 correspond to the left and right wheels of the vehicle to be tested, respectively. Therefore, by detecting the speeds of the first roller 200 and the second roller 300, the driving or acceleration state of the vehicle to be tested can be determined.

[0044] It should be noted that, in the case where the first roller 200 and the second roller 300 are braked by the braking mechanism 400, before step S200, the following steps are further included:

[0045] S210, releasing the braking mechanism 400 from braking the first roller 200 and the second roller 300. In this way, the first roller 200 and the second roller 300 can rotate freely.

[0046] In this embodiment, based on the considerations of the skidding of the vehicle to be tested when starting, the skidding caused by different vehicle adhesion coefficients, and the safety of the test, after the braking of the first roller 200 and the second roller 300 by the braking mechanism 400 is released, the speed of the vehicle to be tested is increased to 20±3km / h, which is conducive to obtaining better speed sampling, thereby ensuring the detection effect of the effectiveness of the ASR performance.

[0047] S300 , providing resistance to the first roller 200 or the second roller 300 through the resistance mechanism 500 to stop the first roller 200 or the second roller 300 from rotating.

[0048] In practical applications, the resistance mechanism 500 can be connected to the first roller 200 or the second roller 300. When the resistance mechanism 500 is connected to the first roller 200, the resistance mechanism 500 provides resistance for the first roller 200; when the resistance mechanism 500 is connected to the second roller 300, the resistance mechanism 500 provides resistance for the second roller 300. In this embodiment, the resistance mechanism 500 provides resistance for the second roller 300 to stop the second roller 300 from rotating, thereby simulating the situation where the left wheel of the vehicle to be tested slips.

[0049] It should be noted that in the description of this embodiment, the continuous numbering of the method steps is for the convenience of review and understanding. In combination with the overall technical solution of the present invention and the logical relationship between the various steps, adjusting the implementation order between the steps will not affect the technical effect achieved by the technical solution of the present invention. For example, in some application examples, the implementation order of step S200 and step S300 is swapped, that is, before the vehicle to be tested starts and accelerates, the resistance mechanism 500 provides resistance to the first roller 200 or the second roller 300, thereby simulating the vehicle starting and slipping.

[0050] In some application examples, the resistance mechanism 500 uses an eddy current motor. Compared with the resistance method of brake pads, the resistance provided by eddy current motors is accurate and flexible, and different resistances can be set for different models and different speeds. The eddy current motor uses the non-contact force-adding method of electromagnetic principles to avoid the resistance mechanism 500 from being severely worn when overcoming huge reaction forces, and has a long service life and no maintenance. In order to meet the resistance requirements of the test, the output power of the eddy current motor is greater than or equal to 160kw, and the eddy current motor outputs resistance in a constant voltage manner. For example, it outputs 6300N resistance when measuring at a speed of 40km / h, thereby meeting the resistance requirements of the test.

[0051] To ensure the effectiveness of the test, the friction coefficients of the first roller 200 and the second roller 300 are both greater than or equal to 0.7. In this way, normal road driving conditions can be fully simulated so that the wheels of the vehicle to be tested can have good contact with the first roller 200 or the second roller 300, thereby avoiding accidental slipping due to insufficient friction, which may lead to test failure.

[0052] S400 , detecting a first speed of the first drum 200 through the first speed sensor 210 , and detecting a second speed of the second drum 300 through the second speed sensor 310 .

[0053] From the above discussion, it can be known that when the first roller 200 and the second roller 300 are in a free rolling state, the wheel speed of the vehicle to be tested corresponds to the speed of the first roller 200 and the second roller 300. Therefore, by detecting the speed of the first roller 200 and the second roller 300 respectively through the first speed sensor 210 and the second speed sensor 310, the driving condition of the vehicle to be tested can be indirectly obtained. When the resistance mechanism 500 provides resistance to the second roller 300, the speed of the second roller 300 gradually decreases until it is zero, which can simulate the situation where the vehicle slips while driving. At this time, the detection of the vehicle to be tested shows that there is a large speed difference between the left and right wheels, and the ASR function of the vehicle to be tested takes effect, distributing the traction of the left wheel to the right wheel, so that the second roller 300 overcomes the resistance and starts to rotate. In this way, by observing the speed change between the first roller 200 and the second roller 300, it can be determined whether the ASR performance of the vehicle to be tested is effective.

[0054] In some application examples, in order to facilitate testing of the tire reaction force of the vehicle to be tested, a force sensor (not shown) is installed on the resistance mechanism 500, and the force sensor is used to measure the force of the resistance mechanism 500. The force sensor returns the detection data to the external control system, so as to obtain the tire reaction force of the vehicle to be tested and adjust the resistance of the resistance mechanism 500.

[0055] Specifically, the force sensor adopts an S-type sensor or a torque sensor. The S-type sensor has the advantages of high measurement accuracy, wide measurement range, easy installation, etc., and has stable performance, which is conducive to improving the reliability of detection.

[0056] S500: Determine the effectiveness of the ASR performance of the vehicle to be tested according to the first speed and the second speed.

[0057] From the above discussion, it can be known that during the test of this embodiment, the left and right wheels of the vehicle to be tested are respectively located on the first roller 200 and the second roller 300, and the rotation of the left and right wheels of the vehicle to be tested drives the first roller 200 and the second roller 300 to rotate. The resistance mechanism 500 provides resistance to the first roller 200 or the second roller 300 to simulate a slipping condition. The speeds of the first roller 200 and the second roller 300 are detected by the first vehicle speed sensor 210 and the second vehicle speed sensor 310 to detect whether the ASR system of the vehicle to be tested is effective, thereby realizing the effectiveness detection of the ASR performance of the vehicle to be tested.

[0058] Refer to the following Figure 3 The ASR detection method of the embodiment of the present invention is described in detail with a specific example. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the present invention.

[0059] After the vehicle to be tested is moved onto the test bench 100, the vehicle to be tested is started and its speed is increased to 20±3 km / h. After the speed of the vehicle to be tested is stabilized, the resistance mechanism 500 provides resistance to the second roller 300, thereby simulating the situation where the vehicle is driving on a road surface with an uneven adhesion coefficient. When the vehicle to be tested skids, the wheels in the skidding state rotate at a high speed, while the wheels without skidding rotate at a low speed. The ASR function of the vehicle to be tested takes effect, and the traction force of the left wheel is distributed to the right wheel, so that the speed of the right wheel is gradually increased, and finally the speeds of the left and right wheels of the vehicle to be tested are balanced.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An ASR detection method, characterized in that: The invention is applied to an ASR detection device, the ASR detection device comprising a stand (100), a first roller (200), a second roller (300) and a resistance mechanism (500), wherein the first roller (200) and the second roller (300) are respectively rotatably mounted on the stand (100), a first vehicle speed sensor (210) is mounted on the first roller (200), and a second vehicle speed sensor (310) is mounted on the second roller (300), the resistance mechanism (500) is connected to a coupling (510), and is connected to the first roller (200) or the second roller (300) through the coupling (510), wherein the resistance mechanism (500) adopts an eddy current motor, and the method comprises: Moving the vehicle to be tested onto the platform (100), and positioning the left and right wheels of the vehicle to be tested on the first roller (200) and the second roller (300), respectively; Starting the vehicle to be tested and accelerating it so that the vehicle to be tested drives the first roller (200) and the second roller (300) to rotate respectively through the left and right wheels; Providing resistance to the first roller (200) or the second roller (300) through the resistance mechanism (500), so as to stop the first roller (200) or the second roller (300) from rotating; detecting a first speed of the first roller (200) by means of the first vehicle speed sensor (210), and detecting a second speed of the second roller (300) by means of the second vehicle speed sensor (310); The effectiveness of the ASR performance of the vehicle to be tested is determined based on the first speed and the second speed.

2. The ASR detection method according to claim 1, characterized in that: The ASR detection device further comprises a braking mechanism (400), and before the vehicle to be tested is moved onto the platform (100), the device further comprises: The first roller (200) and the second roller (300) are braked by the braking mechanism (400).

3. The ASR detection method according to claim 2, characterized in that: Before starting the vehicle to be tested and accelerating, the method further includes: The braking mechanism (400) brakes the first roller and the second roller.

4. The ASR detection method according to any one of claims 1 to 3, characterized in that: Before providing resistance to the first roller (200) or the second roller (300) through the resistance mechanism (500), the method further includes: The speed of the vehicle to be tested is increased to 20±3 km / h.

5. The ASR detection method according to claim 1, characterized in that: The output power of the eddy current motor is greater than or equal to 160kw, and the eddy current motor outputs resistance in a constant voltage manner.

6. The ASR detection method according to claim 1 or 5, characterized in that: A force sensor is installed on the resistance mechanism (500).

7. The ASR detection method according to claim 6, characterized in that: The force sensor is an S-type sensor or a torque sensor.

8. The ASR detection method according to claim 1, characterized in that: The friction coefficient of the first roller (200) and the second roller (300) is greater than or equal to 0.7.

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