A windshield wiper attack angle dynamic measurement device and method

Abstract

The present application relates to a device and method for dynamically measuring the wiper angle of attack, comprising: obtaining distance data of the current target detection position at different swing arm angles; the distance data including the distance between the current target detection position and the front windshield; calculating the angle of attack data at different swing arm angles based on the distance data at different swing arm angles to form an angle of attack data set; using the swing arm angle as the horizontal coordinate and the angle of attack data as the vertical coordinate, and combining the angle of attack data set to form a dynamic curve graph of the angle of attack corresponding to the current target detection position. By comprehensively utilizing data acquisition, data processing, and data visualization, the dynamic curve graph of the angle of attack corresponding to the target detection position can be effectively generated. The trend of the angle of attack at the target detection position changing with the swing arm angle can be intuitively displayed, providing a basis for subsequent analysis and decision-making.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile wipers, and in particular to a device and method for dynamically measuring a wiper attack angle. Background Art

[0002] In automotive wiper systems, the wiper blade's angle of attack (the angle between the blade's center plane and the glass normal) is a crucial parameter affecting proper wiper blade rotation. Measuring the angle of attack provides valuable guidance for troubleshooting unusual wiper noise and wiping issues. A dynamic angle-of-attack measurement device can quickly and effectively determine the angle of attack within the wiping area, enabling inspection of wiper quality.

[0003] In the prior art, the angle of attack measurement tool has a complex structure and a cumbersome process. The measurement method is inefficient and cannot intelligently and intuitively judge and summarize the angle of attack data graphically. It cannot dynamically measure the angle of attack data at various positions of the vehicle blade simultaneously. Summary of the Invention

[0004] The embodiments of the present application provide a device and method for dynamically measuring the wiper attack angle to solve the problem that the prior art cannot quickly and conveniently dynamically measure the attack angle data of each position of the wiper blade and graph the data.

[0005] In a first aspect, a method for dynamic measurement of wiper attack angle is provided, which includes: obtaining distance data of a current target detection position at different swing arm angles; the distance data includes the distance between the current target detection position and the front windshield; based on the distance data at different swing arm angles, calculating the attack angle data at different swing arm angles to form an attack angle data set; using the swing arm angle as the horizontal coordinate and the attack angle data as the vertical coordinate, and combining the attack angle data set to form a dynamic curve graph of the attack angle corresponding to the current target detection position.

[0006] In some embodiments, according to the step of obtaining the dynamic curve graph of the attack angle corresponding to the current target detection position, the dynamic curve graphs of the attack angle corresponding to other target detection positions are obtained.

[0007] In some embodiments, the attack angle dynamic curve is compared with a standard attack angle dynamic range to obtain an evaluation result of the wiper blade.

[0008] In some embodiments, three measuring points distributed in an equilateral triangle are provided at the target detection position; obtaining distance data at different swing arm angles at the current target detection position includes the following steps: using a ranging sensor to measure the distance between the three measuring points and the front windshield at the current swing arm angle, and using it as distance data; repeating the above steps to obtain distance data at different swing arm angles.

[0009] In some embodiments, calculating angle of attack data at different swing arm angles based on the distance data at different swing arm angles includes the following steps: establishing a local coordinate system with three measuring points as references; calculating, in the local coordinate system, the coordinates of three target points on the front windshield corresponding to the three measuring points based on the distance data of the current target detection position at the current swing arm angle; calculating, based on the coordinates of the three target points, the normal vector of the plane formed by the three target points using Formula 1; and calculating, based on the unit vector and the normal vector corresponding to the center plane of the wiper blade, the angle of attack data at the current target detection position of the wiper blade at the current swing arm angle using Formula 2. Repeating the above steps to obtain the angle of attack data of the current target detection position at different swing arm angles.

[0010] In some embodiments, establishing a local coordinate system includes the following steps: three measuring points include a first measuring point, a second measuring point, and a third measuring point distributed in an equilateral triangle; the midpoint of the first measuring point and the second measuring point is used as the origin, the direction from the midpoint to the first measuring point is used as the positive axis of the Y axis, the direction from the midpoint to the third measuring point is used as the positive axis of the X axis, and the thickness direction of the sensor mounting plate is used as the positive axis of the Z axis.

[0011] In a second aspect, a dynamic measurement device for the wiper attack angle is provided, which includes: at least one ranging component, which is used to be set on the wiper blade, the ranging component is used to measure the distance between the measuring point at the target detection position and the front windshield, and output the distance data to the processor; an angle sensor, which is set on the wiper output shaft, the angle sensor is used to measure the rotation angle of the wiper output shaft and output the angle data to the processor, and the wiper output shaft is connected to the wiper blade through the wiper arm; a processor, which is used to obtain distance data and angle data of the current target detection position at different swing arm angles, and calculate the attack angle data at different swing arm angles based on the distance data at different swing arm angles to form an attack angle data set, and use the swing arm angle as the horizontal coordinate and the attack angle data as the vertical coordinate, and combine the attack angle data set to form a dynamic curve graph of the attack angle corresponding to the current target detection position.

[0012] In some embodiments, the ranging assembly includes a ranging sensor and a sensor mounting plate; three ranging sensors are arranged on the sensor mounting plate, and the three measuring points of the three ranging sensors are arranged according to an equilateral triangle; the sensor mounting plate is arranged to be parallel to the upper surface of the wiper blade; and a limit block is provided on the side of the sensor mounting plate, and the limit block is in contact with the side of the wiper blade.

[0013] In some embodiments, a slide rail is provided on the wiper blade; the distance measuring assembly further includes a mounting plate bracket; at least one distance measuring assembly is slidably mounted on the slide rail via the mounting plate bracket, and the sensor mounting plate is fixedly mounted on the mounting plate bracket.

[0014] In some embodiments, a magnet is provided in the sensor mounting plate, a magnetic component is fixed on the wiper blade, and at least one ranging component is magnetically attached to the wiper blade via the corresponding sensor mounting plate.

[0015] The beneficial effects of the technical solution provided by this application include:

[0016] The embodiment of the present application provides a device and method for dynamic measurement of wiper attack angle, which can effectively realize the acquisition of distance data, attack angle data calculation and dynamic curve graph display of the target detection position at different swing arm angles, wherein, by acquiring the distance data between the target detection position and the front windshield, combined with the data records at different swing arm angles, a complete data set can be obtained, providing a data basis for subsequent calculations. Using the distance data at different swing arm angles, the corresponding attack angle data is calculated, and a complete attack angle data set is obtained. Finally, the swing arm angle and attack angle data are combined to draw a dynamic curve graph, which can intuitively show the trend of the attack angle at the target detection position changing with the swing arm angle, providing a basis for subsequent analysis and decision-making. The comprehensive use of data acquisition, data processing and data visualization can effectively complete the generation of the dynamic curve graph of the attack angle corresponding to the target detection position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A flow chart of a method for dynamically measuring the wiper attack angle provided in an embodiment of the present application;

[0019] Figure 2 Schematic diagram of the application scenario of the ranging component provided in the embodiment of the present application;

[0020] Figure 3 Schematic diagram of the angle sensor application scenario provided in the embodiment of the present application;

[0021] Figure 4 Schematic diagram of the local coordinate system and related structures provided in the embodiment of this application.

[0022] In the figure: 1. Front windshield; 2. Angle sensor; 3. Wiper output shaft; 4. Wiper blade; 5. Distance sensor; 6. Sensor mounting plate; 7. Distance component; 8. Wiper arm; 9. First measuring point; 10. Second measuring point; 11. Third measuring point; 12. Midpoint. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] The embodiments of the present application provide a device and method for dynamically measuring the wiper attack angle, which can solve the problem that the prior art cannot quickly and conveniently dynamically measure the attack angle data of each position of the wiper blade and graph the data.

[0025] Since the existing technology for measuring angle of attack has complex structures and cumbersome processes, and the measurement method is inefficient and cannot intelligently and intuitively determine and summarize the angle of attack data graphically, and cannot simultaneously and dynamically measure the angle of attack data at various positions of the vehicle's wiper blade 4, a method is designed to indirectly and quickly measure the required angle of attack data. Specifically, a sensor for measuring angles and three sensors for measuring distances are used to obtain distance data between three measuring points at the target detection position of the wiper blade 4 corresponding to different swing arm angles and the front windshield 1. The distance data and angle data are then output to a third-party processing system. The processing system uses the swing arm angle as the horizontal coordinate and the angle of attack data as the vertical coordinate, and combines the aforementioned angle of attack data set to generate a dynamic curve graph of the angle of attack corresponding to the current target detection position. This solves the problem of the existing technology's inability to quickly and conveniently and graphically measure the angle of attack data at various positions of the wiper blade 4.

[0026] refer to Figure 1-2 , a method for dynamically measuring a wiper attack angle, comprising:

[0027] Step 101: Obtain the distance data of the current target detection position at different swing arm angles. The distance data includes the distance between the current target detection position and the front windshield 1. Through this step, the distance data between the target detection position and the front windshield 1 is obtained. Combined with the data records at different swing arm angles, a complete distance data set can be obtained, providing a data basis for subsequent calculations.

[0028] Step 102: Based on the distance data at different arm swing angles, calculate the angle of attack data at different arm swing angles to form an angle of attack data set. This step uses the distance data set at different arm swing angles to calculate the corresponding angle of attack data and obtain a complete angle of attack data set, providing a data basis for subsequent data collation and drawing of dynamic curve graphs.

[0029] Step 103: Using the arm swing angle as the horizontal axis and the angle of attack data as the vertical axis, combined with the angle of attack data set, a dynamic curve graph of the angle of attack corresponding to the current target detection location is generated. The final step combines the arm swing angle and the angle of attack data to create a dynamic curve graph. This visually demonstrates how the angle of attack at the target detection location changes with the arm swing angle, providing a basis for subsequent analysis and decision-making.

[0030] The above steps, combining data collection, data processing, and data visualization, effectively generate a dynamic graph of the angle of attack corresponding to the target detection location. This dynamic graph intuitively displays the changes in the angle of attack of the wiper blade 4 at different angles, facilitating real-time monitoring and optimization of wiper performance. This method allows for more accurate measurement and monitoring of wiper angle of attack data at different arm angles.

[0031] In some preferred embodiments, according to the steps of obtaining the dynamic curve graph of the attack angle corresponding to the current target detection position, the dynamic curve graphs of the attack angle corresponding to other target detection positions are obtained. Select different target detection positions: According to specific needs, select other target detection positions and record the corresponding position information. Obtain the attack angle data set of the wiper blade at other target detection positions at different swing arm angles: For the newly selected target detection position, repeat the measurement process in step 1 to obtain the attack angle data set of the wiper blade at different swing arm angles. Combine the newly obtained attack angle data set with the corresponding swing arm angle information to draw the dynamic curve graphs of the attack angle at other target detection positions. In this way, the working performance of the wiper at different target detection positions can be compared, possible problems can be found and adjustments and optimizations can be made.

[0032] In some preferred embodiments, the evaluation result of the wiper blade 4 is obtained based on the obtained attack angle dynamic curve diagram and compared with the standard attack angle dynamic range. First, the attack angle dynamic curve diagram of the wiper blade 4 at different swing arm angles is obtained based on the actual test data. Secondly, according to relevant standards or actual needs, the standard attack angle dynamic range that the wiper blade 4 should reach is confirmed. The actual attack angle dynamic curve diagram of the wiper blade 4 is compared and analyzed with the standard attack angle dynamic range. Check whether the actual data is within the standard range to understand whether the working condition of the wiper blade 4 meets expectations. Based on the results of the comparison, the performance of the wiper blade 4 is evaluated. If the actual data is within the standard range, it can be evaluated as qualified; if the actual data exceeds the standard range, the wiper blade 4 needs to be further adjusted or replaced.

[0033] In some preferred embodiments, three measuring points are arranged in an equilateral triangle at the target detection location. Acquiring distance data at different swing arm angles at the current target detection location includes the following steps: using the distance measuring sensor 5 to measure the distance between the three measuring points and the front windshield 1 at the current swing arm angle, and using this distance data as the distance data; repeating these steps to obtain distance data at different swing arm angles. The distance data between each measuring point and the front windshield 1 is recorded, and the acquired distance data is organized and analyzed to provide a data basis for subsequent calculation of the angle of attack.

[0034] In some preferred embodiments, calculating the angle of attack data at different swing arm angles based on the distance data at different swing arm angles includes the following steps:

[0035] A local coordinate system is established using the three measuring points and the distances between them as references. Based on the distance data from the current target detection position at the current swing arm angle, the coordinates of the three target points on the front windshield 1 corresponding to the three measuring points are calculated in the local coordinate system. The normal vectors of the plane formed by the three target points are calculated using Formula 1 based on the coordinates of the three target points. The angle of attack data of the wiper blade 4 at the current target detection position at the current swing arm angle is calculated using Formula 2 based on the unit vector and normal vector corresponding to the center plane of the wiper blade 4. Repeat these steps to obtain the angle of attack data of the current target detection position at different swing arm angles.

[0036] Through these steps, the angle of attack data at the target detection position can be accurately calculated. First, a local coordinate system is established at the target detection position using the three measuring points as a reference. Then, based on the distance data at the current target detection position of the wiper blade 4 at the current swing arm angle and the local coordinate system, the coordinates of the target points corresponding to the three measuring points on the front windshield 1 are calculated. The three target points are respectively denoted as A, B, and C. Given their coordinates, the normal vector of the plane formed by these three points is calculated based on the coordinates of the three target points, that is, the normal vector The calculation method is obtained by formula 1: According to the unit vector corresponding to the center plane of the wiper blade 4 and the normal vector of the plane mentioned above , the corresponding angle of attack is recorded as , the attack angle data of the wiper blade 4 at the current target detection position under the current swing arm angle is calculated by formula 2:

[0037]

[0038] In some preferred embodiments, the establishment of the local coordinate system comprises the following steps:

[0039] The three measuring points include the first measuring point 9, the second measuring point 10, and the third measuring point 11, which are distributed in an equilateral triangle. The midpoint 12 between the first measuring point 9 and the second measuring point 10 is used as the origin, the direction from the midpoint 12 to the first measuring point 9 is used as the positive axis of the Y axis, the direction from the midpoint 12 to the third measuring point 11 is used as the positive axis of the X axis, and the thickness direction of the sensor mounting plate 6 is used as the positive axis of the Z axis. The distance between the three measuring points distributed in an equilateral triangle is recorded as L, the distance data between the three measuring points and the three target points A, B, and C are recorded as d1, d2, and d3 respectively, and the distance between the midpoint 12 and the third measuring point 11 is recorded as h. Using trigonometric functions, h= L. Through this local coordinate system and the above data, we can get the first target point A (0, L / 2, -d1), the second target point B (0, -L / 2, -d2), and the third target point C (h, 0, -d3); then = (0, -L, d1-d2), vector = (h, -L / 2, d1-d3), the unit vector corresponding to the center plane of wiper blade 4 =(0,1,0). Based on the coordinates of these points and vector coordinates obtained in the local coordinate system, the corresponding attack angle data of different target detection positions can be obtained by substituting them into the above formulas 1 and 2.

[0040] In some preferred embodiments, the embodiments of the present application provide a dynamic measurement device for the wiper attack angle, which includes: at least one ranging component 7, which is used to be set on the wiper blade 4, the ranging component 7 is used to measure the distance between the measuring point at the target detection position and the front windshield 1, and output the distance data to the processor; an angle sensor 2, which is set on the wiper output shaft 3, the angle sensor 2 is used to measure the rotation angle of the wiper output shaft 3 and output the angle data to the processor, and the wiper output shaft 3 is connected to the wiper blade 4 through the wiper arm 8; a processor, which is used to obtain the distance data and angle data of the current target detection position at different swing arm angles, and based on the distance data at different swing arm angles, calculate the attack angle data at different swing arm angles to form an attack angle data set, and use the swing arm angle as the horizontal coordinate and the attack angle data as the vertical coordinate, and combine the attack angle data set to form a dynamic curve graph of the attack angle corresponding to the current target detection position.

[0041] The structural design of this device includes components such as a distance measuring component 7, an angle sensor 2, and a processor. Its function is to measure the distance between the position of the wiper blade 4 and the front windshield 1, and to measure the rotation angle of the wiper output shaft 3, and finally calculate the angle of attack data under the current swing arm angle. The processor can also integrate the angle of attack data under different swing arm angles to form a corresponding dynamic curve diagram of the angle of attack. Among them, the distance measuring component 7 is responsible for measuring the distance between the measuring point at the target detection position and the front windshield 1, and transmitting the distance data to the processor. The angle sensor 2 is used to measure the rotation angle of the wiper output shaft 3 and send the angle data to the processor. Such a dynamic curve diagram can help staff more intuitively understand the working conditions of the wiper at different angles, and provide a reference for discovering and adjusting wiper setting problems.

[0042] In some preferred embodiments, the distance measuring assembly 7 includes distance measuring sensors 5 and a sensor mounting plate 6. Three distance measuring sensors 5 are mounted on the sensor mounting plate 6, with the three measuring points of the three distance measuring sensors 5 arranged in an equilateral triangle. The sensor mounting plate 6 is positioned parallel to the upper surface of the wiper blade 4, and the sides of the sensor mounting plate 6 are provided with stoppers that mate with the sides of the wiper blade 4. An equilateral triangle layout means that the three distance measuring sensors 5 are positioned to form an equilateral triangle, with each distance from the other two distance measuring sensors 5 being equidistant. This layout provides computational support for subsequent data measurement and better meets the angle of attack data measurement requirements of the wiper angle dynamic measurement device. These stoppers mate with the sides of the wiper blade 4 to secure the sensor mounting plate 6 in place on the blade, preventing the sensors from moving or shaking during measurement, which could affect distance measurement accuracy. This design can improve the efficiency and accuracy of the device.

[0043] In some preferred embodiments, the wiper blade 4 is provided with a slide rail; the distance measuring assembly 7 further includes a mounting plate bracket; at least one distance measuring assembly 7 is slidably mounted on the slide rail via the mounting plate bracket, and the sensor mounting plate 6 is fixedly mounted on the mounting plate bracket. At least one distance measuring assembly 7 can slide on the slide rail of the wiper blade 4 via the mounting plate bracket, allowing for easy change of target detection position. Multiple distance measuring assemblies 7 can be connected in parallel to simultaneously measure angle of attack data at different locations.

[0044] In some preferred embodiments, a magnet is incorporated into the sensor mounting plate 6, a magnetic component is fixed to the wiper blade 4, and at least one ranging assembly 7 is magnetically attached to the wiper blade 4 via the corresponding sensor mounting plate 6. The magnet incorporated into the sensor mounting plate 6 and the magnetic component fixed to the wiper blade 4 securely connect the sensor mounting plate 6 and the wiper blade 4 through magnetic attraction. This mounting method eliminates the need for bolts or other fasteners, making sensor installation and replacement relatively convenient while also minimizing impact on the wiper blade. Multiple ranging assemblies 7 can also be connected in parallel to simultaneously measure angle of attack data at different locations.

[0045] The beneficial effects brought about by the present invention include:

[0046] 1. It can effectively acquire distance data, calculate angle of attack data, and display dynamic curve graphs at the target detection location at different swing arm angles. By acquiring distance data between the target detection location and the front windshield 1 and combining it with data recorded at different swing arm angles, a complete data set can be obtained, providing a data foundation for subsequent calculations. Using the distance data at different swing arm angles, the corresponding angle of attack data is calculated, resulting in a complete angle of attack data set. Finally, the swing arm angle and angle of attack data are combined to create a dynamic curve graph, visually demonstrating how the angle of attack at the target detection location changes with swing arm angle, providing a basis for subsequent analysis and decision-making. By comprehensively utilizing data acquisition, data processing, and data visualization, the system can effectively generate a dynamic curve graph of the angle of attack corresponding to the target detection location.

[0047] 2. A measuring device is mounted on the wiper blade to measure the distance between the target detection point and the front windshield 1. The measuring device outputs this distance data to a processor, which further calculates the angle of attack. An angle sensor 2, mounted on the wiper output shaft 3, measures the rotation angle and transmits the data to the processor. The processor records the wiper blade position at different swing arm angles and collects the angle of attack data. Using the swing arm angle as the horizontal axis and the angle of attack data as the vertical axis, a dynamic curve graph of the angle of attack corresponding to the target detection position is generated. This graph helps operators intuitively understand the wiper blade's performance at different angles and provides a reference for identifying and correcting any problems.

[0048] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0050] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for dynamically measuring a wiper attack angle, characterized in that: It includes: Obtaining the distance data of the current target detection position at different swing arm angles includes the following steps: Three measuring points distributed in an equilateral triangle are provided at the target detection position; the distances between the three measuring points and the front windshield (1) at the current swing arm angle are measured using a distance measuring sensor (5), and are used as the distance data; the above steps are repeated to obtain distance data at different swing arm angles; the distance data includes the distance between the current target detection position and the front windshield (1); Based on the distance data at different arm swing angles, attack angle data at different arm swing angles are calculated to form an attack angle data set; calculating the attack angle data at different arm swing angles includes the following steps: A local coordinate system is established with the three measuring points as references; based on the distance data of the current target detection position at the current swing arm angle, the coordinates of the three target points on the front windshield (1) corresponding to the three measuring points are calculated in the local coordinate system; based on the coordinates of the three target points, a normal vector of the plane formed by the three target points is calculated by a formula; based on the unit vector corresponding to the center plane of the wiper blade (4) and the normal vector, an attack angle data of the current target detection position of the wiper blade (4) at the current swing arm angle is calculated by a formula; the above steps are repeated to obtain the attack angle data of the current target detection position at different swing arm angles; The swing arm angle is used as the horizontal coordinate, the attack angle data is used as the vertical coordinate, and the attack angle data set is combined to form a dynamic curve graph of the attack angle corresponding to the current target detection position.

2. The method for dynamically measuring the wiper attack angle according to claim 1, wherein: According to the step of obtaining the attack angle dynamic curve graph corresponding to the current target detection position, the attack angle dynamic curve graphs corresponding to other target detection positions are obtained.

3. The method for dynamically measuring the wiper attack angle according to claim 2, wherein: The attack angle dynamic curve is compared with a standard attack angle dynamic range to obtain an evaluation result of the wiper blade (4).

4. The method for dynamically measuring the wiper attack angle according to claim 1, wherein: The establishment of the local coordinate system includes the following steps: The three measuring points include a first measuring point (9), a second measuring point (10) and a third measuring point (11) distributed in an equilateral triangle; a midpoint (12) between the first measuring point (9) and the second measuring point (10) is used as an origin, a direction from the midpoint (12) to the first measuring point (9) is used as a positive axis of the Y axis, a direction from the midpoint (12) to the third measuring point (11) is used as a positive axis of the X axis, and a thickness direction of the sensor mounting plate (6) upward is used as a positive axis of the Z axis.

5. A dynamic measurement device for wiper attack angle, characterized in that: It includes: At least one distance measuring component (7) is arranged on the wiper blade (4), the distance measuring component (7) is used to measure the distance between a measuring point at a target detection position and the front windshield (1), and output the distance data to a processor; An angle sensor (2) is provided on a wiper output shaft (3), the angle sensor (2) being used to measure the rotation angle of the wiper output shaft (3) and output the angle data to the processor, and the wiper output shaft (3) is connected to the wiper blade (4) via a wiper arm (8); The processor is used to obtain distance data and angle data of the current target detection position at different swing arm angles, and includes the following steps: The target detection position is provided with three measuring points distributed in an equilateral triangle; the distance between the three measuring points and the front windshield (1) at the current swing arm angle is measured using a distance measuring sensor (5), and the distance is used as the distance data; the above steps are repeated to obtain the distance data at different swing arm angles, and based on the distance data at different swing arm angles, the attack angle data at different swing arm angles are calculated to form an attack angle data set, and the calculation of the attack angle data at different swing arm angles includes the following steps: establishing a local coordinate system with the three measuring points as references; calculating three in the local coordinate system according to the distance data of the current target detection position at the current swing arm angle; The measuring points correspond to the coordinates of three target points on the front windshield (1); based on the coordinates of the three target points, the normal vector of the plane formed by the three target points is calculated by a formula; based on the unit vector corresponding to the center plane of the wiper blade (4) and the normal vector, the attack angle data of the current target detection position of the wiper blade (4) under the current swing arm angle is calculated by a formula; repeat the above steps to obtain the attack angle data of the current target detection position under different swing arm angles; and use the swing arm angle as the horizontal coordinate and the attack angle data as the vertical coordinate, and combine the attack angle data set to form a dynamic curve diagram of the attack angle corresponding to the current target detection position.

6. The wiper attack angle dynamic measurement device according to claim 5, characterized in that: The distance measuring assembly (7) includes a distance measuring sensor (5) and a sensor mounting plate (6); The three distance measuring sensors (5) are arranged on the sensor mounting plate (6), and the three measuring points of the three distance measuring sensors (5) are arranged in an equilateral triangle; The sensor mounting plate (6) is arranged parallel to and in contact with the upper surface of the wiper blade (4); and a limit block is provided on the side of the sensor mounting plate (6), and the limit block is in contact with the side of the wiper blade (4).

7. The wiper attack angle dynamic measurement device according to claim 6, characterized in that: The wiper blade (4) is provided with a slide rail; The distance measuring assembly (7) further comprises a mounting plate bracket; at least one of the distance measuring assemblies (7) is slidably mounted on the slide rail via the mounting plate bracket, and the sensor mounting plate (6) is fixedly mounted on the mounting plate bracket.

8. The wiper attack angle dynamic measurement device according to claim 6, characterized in that: A magnet is provided in the sensor mounting plate (6), a magnetic component is fixedly provided on the wiper blade (4), and at least one distance measuring component (7) is magnetically attached to the wiper blade (4) via the corresponding sensor mounting plate (6).

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