Building aging-adaptive friction coefficient detection device and friction coefficient detection method

Abstract

The divisional application provides a building aging-adaptive friction coefficient detection device and a friction coefficient detection method, and the building aging-adaptive friction coefficient detection device comprises a detection module. The detection module comprises a motion unit, a driving unit used for driving the motion unit to move and detecting the tensile force, a position detection unit used for detecting the position of the motion unit, and a pressure sensor installed on the motion unit and used for detecting the pressure value of the motion unit acting on the detection surface. The positioning unit is used for detecting the position of the detection module, and the control unit is electrically connected with the positioning unit, the driving unit, the position detection unit and the pressure sensor. According to the building aging-suitable friction coefficient detection device, the friction coefficients of all points in an area can be dynamically obtained and summarized, so that a user can intuitively know the friction coefficients of different positions, and the positions with the friction coefficients lower than a standard value can be maintained.

Description

[0001] This application is a divisional application of application number 202410776503.1, application date June 17, 2024, and invention name “Friction coefficient detection device and friction coefficient detection method”. Technical Field

[0002] The invention relates to a device and method for detecting a friction coefficient of building aging-friendly buildings. Background Art

[0003] In communities, especially old communities, the ground often wears out to varying degrees after years of use. Even in the same area with the same building materials, the ground friction coefficient varies from place to place. This brings a lot of inconvenience to subsequent maintenance and repairs, and can also cause safety problems for the elderly when traveling due to uneven ground wear and slippery surfaces. The existing tests of ground friction coefficients or ground anti-slip values ​​are often targeted at several pre-selected sampling points, so the test results will have a certain degree of randomness, and it is impossible to complete the distribution of the overall friction coefficient of the entire area.

[0004] In view of this, it is necessary to improve the existing building aging-friendly friction coefficient detection device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a building aging-friendly friction coefficient detection device to solve the problem that the existing detection device cannot complete the overall friction coefficient detection in the area.

[0006] To achieve the above-mentioned purpose, the present invention provides a device for detecting the coefficient of friction of a building suitable for aging. The device for detecting the coefficient of friction of a building suitable for aging includes a detection module. The detection module includes a motion unit, a driving unit for driving the motion unit to move and detect the magnitude of dynamic friction, a position detection unit for detecting the position of the motion unit, a pressure sensor installed on the motion unit for detecting the pressure value of the motion unit acting on a detection surface, a positioning unit for detecting the position of the detection module, a control unit and a transfer unit. The control unit is electrically connected to the positioning unit, the driving unit, the position detection unit and the pressure sensor. The positioning unit is used to position the detection module. The transfer unit is connected to the driving unit and the motion unit to drive the detection module to move to other positions. The driving unit is connected to the motion unit through a pull rope to drive the motion unit to approach or move away from the driving unit. The driving unit includes a tension sensor for detecting the tension of the pull rope. The position detection unit is a distance sensor and an angle sensor. The distance sensor is fixed on the driving unit to detect the relative position of the motion unit and the driving unit. The angle sensor is used to detect the angle of the pull rope relative to one direction.

[0007] As a further improvement of the present invention, the building aging-friendly friction coefficient detection device also includes a positioning baffle, which defines a detection area, and the detection module is located in the detection area.

[0008] As a further improvement of the present invention, the motion unit includes a friction plate arranged below and in contact with the detection surface, and a counterweight block arranged above the friction plate to provide downward pressure.

[0009] As a further improvement of the present invention, the detection module also includes an acceleration sensor for obtaining the real-time motion state of the motion unit.

[0010] As a further improvement of the present invention, the position detection unit is one or more of a laser displacement sensor, an angle sensor or a distance measuring sensor.

[0011] As a further improvement of the present invention, the present invention also provides a friction coefficient detection method, which adopts the building aging-friendly friction coefficient detection device as described above and comprises the following steps:

[0012] S1: Set a detection area, place the building aging friction coefficient detection device in the detection area; establish a boundary in the detection area, install a positioning baffle, and use one of the intersection points of the vertically intersecting positioning baffles as the origin o(0, 0) of the detection area;

[0013] S10: stretch the motion unit to the position farthest from the driving unit, and the positioning unit obtains the initial value of the detection module as (xo, yo);

[0014] S11: Adjust the weight of the counterweight block and adjust the pressure N acting on the ground so that the pressure during the test is within the linear test area of ​​the pressure sensor;

[0015] S2: The control unit controls the driving unit to drive the motion unit to move at a constant speed until the constant speed motion trajectory of the motion unit covers the detection area; the control unit controls the driving unit to output a pulling force to drive the motion unit to move in a radial direction at a constant speed until the motion unit contacts the driving unit, and then the transfer unit or manually moves the driving unit and the motion unit in a circular direction for a certain angle, so that there is no gap between the next motion trajectory of the motion unit and the previous motion trajectory, and repeats multiple times to make the motion trajectory cover the detection area;

[0016] S3: The control unit detects the pulling force provided by the driving unit at any time i when the moving unit moves, the pressure Ni at this position, and the state of uniform movement is detected by the acceleration sensor and judged by the control unit. In the uniform movement state, the friction force Fi is equal to the pulling force of the driving unit, and the friction coefficient μ(xi, yi)=Fi / Ni at this position is calculated. At time i of the movement process, the relative position (xi, yi) of the moving unit relative to the center is expressed as (ri·cos(αi), ri·sin(αi)), and the friction coefficient at the relative position is: μ(ri·cos(αi), ri·sin(αi))=Fi / Ni, which is converted into the detection area coordinates: μ(xo+ri·cos(αi), yo+ri·sin(αi))=Fi / Ni. If multiple friction coefficients are obtained after multiple detections at the same position, the average value of the multiple friction coefficients is taken;

[0017] In step S3, the control unit detects the friction coefficients at different positions, and divides the friction coefficients at different positions into different color blocks to form a color block diagram.

[0018] The beneficial effects of the present invention are as follows: the building aging-friendly friction coefficient detection device of the present invention can dynamically obtain the friction coefficient of each point in the area and summarize and organize it, so that users can intuitively understand the friction coefficients of different positions, which is conducive to repairing the positions where the friction coefficient is lower than the standard value, and avoiding safety problems caused by slippery ground for the elderly to travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a building aging-friendly friction coefficient detection device of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of a detection module according to the first embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of a detection module according to Embodiment 2 of the present invention;

[0022] Figure 4 is a schematic diagram of the structure of a detection module according to Embodiment 3 of the present invention;

[0023] Figure 5 It is a schematic diagram of a color block diagram obtained by the friction coefficient detection method of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figures 1 to 4 As shown, the building aging-friendly friction coefficient detection device 100 of the present invention includes a detection module 2 and a positioning baffle 1.

[0028] The positioning baffle 1 defines a detection area, the detection module 2 is located in the detection area, and the positioning baffle 1 is used to locate the relative position of the detection module 2 during each detection.

[0029] The detection module 2 includes a motion unit 21, a driving unit 22 for driving the motion unit 21 to move and detect the magnitude of the dynamic friction force, a connecting piece 23 connected between the motion unit 21 and the driving unit 22, a transfer unit, a position detection unit 24 for detecting the position of the motion unit 21, a pressure sensor installed on the motion unit 21 for detecting the pressure value of the motion unit 21 acting on the detection surface, a positioning unit 25 for detecting the position of the detection module 2, an acceleration sensor for obtaining the real-time motion state of the motion unit 21, a control unit, and an alarm unit.

[0030] The motion unit 21 includes a friction plate disposed below and in contact with the detection surface, and a counterweight disposed above the friction plate to provide downward pressure. In this embodiment, the friction plate is made of rubber material to simulate the friction between the sole and the ground, and the counterweight is used to make the motion unit 21 generate a certain pressure on the ground.

[0031] The pressure sensor is a thin film pressure sensor or a force sensor in the shape of a disc with a groove installed, which is arranged at the bottom of the friction plate to detect the reaction force facing the motion unit 21.

[0032] The connecting member 23 and the driving unit 22 can be adjusted according to different detection methods, wherein the connecting member 23 can adopt a flexible or rigid structure, and the driving unit 22 can provide a pulling force or a rotational force to drive the motion unit 21 to move in a straight line or rotate around the driving unit 22. The driving unit 22 is electrically connected to the control unit, and the control unit controls the output power of the driving unit 22 to ensure that the motion unit 21 can achieve uniform motion. The uniform motion here includes uniform linear motion and uniform rotation. When the speed of the motion unit 21 is low and the friction coefficient of the bottom surface of the general building is not easy to produce a sudden change, the uniform motion of the motion unit 21 can be achieved.

[0033] The transfer unit is connected to the drive unit 22 and the motion unit 21 to drive the detection module to move to other positions as a whole, so that the friction coefficients at different positions can be detected, making the detection more intelligent. In addition, the transfer unit can also drive the motion unit 21 to move away from the drive unit 22, so as to achieve the effect of resetting the motion unit 21.

[0034] In the present embodiment, the transfer unit is electrically connected to the control unit, and the control unit controls the operation of the transfer unit so as to cover all positions within the detection area. In some other embodiments, if the transfer unit is not provided, the measurement of different positions can be achieved and the position can be calculated by manually moving the driving unit 22 and the motion unit 21.

[0035] The positioning unit 25 can position the detection module 2, that is, determine the position coordinates of the detection module 2 in the detection area.

[0036] The position detection unit 24 is one or more of a laser displacement sensor, an angle sensor or a distance sensor. The position detection unit 24 can detect the relative position of the motion unit 21, and in combination with the positioning unit 25, the position coordinates of the motion unit 21 in the detection area can be obtained. In this way, the friction coefficient of each position can be detected.

[0037] The control unit is electrically connected to the positioning unit 25 , the position detection unit 24 , the acceleration sensor and the pressure sensor.

[0038] The control unit can determine the coordinate information of the motion unit 21 in combination with the positioning unit 25 and the position detection unit 24. The control unit can determine whether the motion unit 21 is in a uniform motion state based on the acceleration sensor, and the acceleration sensor is arranged on the motion unit 21. The control unit can determine the pressure of the motion unit 21 on the detection surface based on the information of the pressure sensor. The control unit can measure the force value of the uniform motion of the driving unit 21 based on the sensor in the driving unit 22. The friction coefficient at any position can be calculated based on the above information.

[0039] The control unit is also electrically connected to the alarm unit. When some detection surfaces are concave, the pressure of the motion unit 21 at this position is 0. At this time, the control unit can control the alarm unit to issue an alarm and record the position. When some areas are convex, the drive unit 22 cannot drive the motion unit 21 to pass through the position, then the control unit can control the alarm unit to issue an alarm, record the position, and intervene manually.

[0040] According to different forms of the detection module 2 and corresponding friction coefficient detection methods, the present invention provides the following three embodiments.

[0041] Embodiment 1:

[0042] In this embodiment, the connecting member 23 is a flexible pull rope, and the driving unit 22 is connected to the moving unit 21 via the pull rope to drive the moving unit 21 to move closer to or away from the driving unit 22 .

[0043] The driving unit 22 includes a tension sensor for detecting the tension of the rope. When the motion unit 21 moves at a constant speed, the detected tension is equal to the dynamic friction. The position detection unit 24 is a distance sensor, which is fixed on the driving unit 22 to detect the relative position of the motion unit 21 and the driving unit 22. In this embodiment, the rope extends along the y direction. The distance sensor can be combined with the positioning unit to determine the coordinate of the motion unit 21 on the y axis. The position detection unit 24 can also include a ruler for detecting the position of the motion unit 21 perpendicular to the rope direction, and combined with the positioning unit to determine the coordinate of the motion unit 21 on the x axis. In some embodiments, it is not necessary to set a ruler, and there are other ways to detect the coordinate of the x axis, or the detection module 2 has only a unique motion trajectory on the x axis.

[0044] The friction coefficient detection method corresponding to this embodiment includes the following steps:

[0045] S1: Set a detection area, place the building aging-friendly friction coefficient detection device 100 in the detection area; establish a boundary within the detection area, install a positioning baffle 1, and use an intersection point of the vertically intersecting positioning baffles as the origin o(0, 0) of the detection area;

[0046] S10: The motion unit 21 is stretched to the position farthest from the driving unit 22, and the positioning unit 25 obtains the initial position of the detection module 2 (x o ,y o );

[0047] S11: Adjust the weight of the counterweight block and adjust the pressure N acting on the ground so that the pressure during the test is within the linear test area of ​​the pressure sensor;

[0048] S2: The control unit controls the driving unit 22 to drive the motion unit 21 to move at a constant speed until the constant speed motion trajectory of the motion unit 21 covers the detection area; in this embodiment, the control unit controls the driving unit 22 to output a pulling force to drive the motion unit 21 to move at a constant speed in a straight line along the y direction until the motion unit 21 contacts the driving unit 22, and then the transfer unit or manually moves the driving unit 22 and the motion unit 21 along the x-axis direction for a distance, so that the next motion trajectory of the motion unit 21 does not overlap with the previous motion trajectory and no gap is generated. Repeating multiple times, the motion trajectory can cover the detection area.

[0049] S3: The control unit obtains the pulling force value that causes the motion unit 21 to move at a uniform speed through the driving unit 22. The state of uniform movement is detected by the acceleration sensor and determined by the control unit. In the state of uniform motion, the friction force Fi is equal to the pulling force of the driving unit 22. The friction force Fi at any time i and the pressure Ni at the position are used to calculate the friction coefficient μ(xi, yi) = Fi / Ni at the position. The friction coefficient at the relative position (xi, yi) is: μ(xi, yi) = Fi / Ni, which is converted into the detection area coordinates: μ(xo+xi, yo+yi) = Fi / Ni. If the same position is measured multiple times, the average value of the multiple measurements can be used to represent the friction coefficient of the position.

[0050] In step S3, the control unit calculates the friction coefficients at different positions, and divides the friction coefficients at different positions into different color blocks to form a color block diagram.

[0051] In this embodiment, the detection range of the detection module 2 is a rectangle, the driving unit 22 is arranged on one side of the rectangle, the positioning unit 25 is located at a corner of the rectangle, and the coordinates of the position are defined as (xo, yo), and the driving unit 22 drives the motion unit 21 to move at a uniform speed within the rectangular range.

[0052] Embodiment 2:

[0053] In this embodiment, the connecting member is a flexible pull rope 33 and a rigid sheath 34, and the driving unit 32 is connected to the motion unit 31 through the pull rope to drive the motion unit 31 to move closer to or away from the driving unit 32. The rigid sheath is arranged on both sides of the motion unit 31, so as to prevent the motion unit 31 from swinging during movement, so as to limit the position of the motion unit 31, and the sheath 34 is fixedly connected to the driving unit 32, so that when the transfer unit drives the driving unit 32 to move, the sheath and the motion unit 31 can be driven to move at the same time.

[0054] The driving unit 32 includes a tension sensor for detecting the tension of the rope. When the motion unit 31 moves at a constant speed, the detected tension is equal to the dynamic friction. The position detection unit is a distance sensor and an angle sensor. The distance sensor is fixed on the driving unit 32 to detect the relative position of the motion unit 31 and the driving unit 32. The angle sensor is used to detect the angle of the rope relative to a direction, which is the x-axis direction. In this embodiment, the angle α between the rope and the x-axis is detected. The positioning unit is set on the driving unit 32 to detect the coordinates of the driving unit 32 in the entire detection area.

[0055] In this embodiment, the position of the driving unit 32 is relatively fixed, and the coordinates of the motion unit 31 at any position can be determined by rotating the driving unit 32 according to the data detected by the distance sensor and the angle sensor.

[0056] The friction coefficient detection method corresponding to this embodiment includes the following steps:

[0057] S1: Set a detection area, place the building aging-friendly friction coefficient detection device 100 in the detection area; establish a boundary within the detection area, install a positioning baffle 1, and use an intersection point of the vertically intersecting positioning baffles as the origin o(0, 0) of the detection area;

[0058] S10: stretch the motion unit 31 to the position farthest from the driving unit 32, and the positioning unit obtains the initial position of the detection module 2 as (xo, yo);

[0059] S11: Adjust the weight of the counterweight block and adjust the pressure N acting on the ground so that the pressure during the test is within the linear test area of ​​the pressure sensor;

[0060] S2: The control unit controls the driving unit 32 to drive the motion unit 31 to move at a constant speed until the constant speed motion trajectory of the motion unit 31 covers the detection area; in this embodiment, the control unit controls the driving unit 32 to output a pulling force, driving the motion unit 31 to move in a radial direction at a constant speed until the motion unit 31 contacts the driving unit 32, and then the transfer unit or manually moves the driving unit 32 and the motion unit 31 in the circumferential direction by a certain angle, so that the next motion trajectory of the motion unit 31 minimizes the overlap with the previous motion trajectory and does not generate a gap. Repeating multiple times, the motion trajectory can cover the detection area.

[0061] S3: The control unit detects the pulling force provided by the driving unit 32 of the motion unit 31 at any time i during movement, and the pressure Ni at the position. The state of uniform movement is detected by the acceleration sensor and judged by the control unit. In the uniform motion state, the friction force Fi is equal to the pulling force of the driving unit 32. The friction coefficient μ(xi, yi)=Fi / Ni at this position is calculated. At time i of the motion process, the relative position (xi, yi) of the motion unit 31 relative to the center can also be expressed as (ri·cos(αi), ri·sin(αi)), and the friction coefficient at the relative position is: μ(ri·cos(αi), ri·sin(αi))=Fi / Ni, which is converted into the detection area coordinates: μ(xo+ri·cos(αi), yo+ri·sin(αi))=Fi / Ni. If multiple friction coefficients are obtained after multiple detections at the same position, the average value of the multiple friction coefficients is taken.

[0062] In step S3, the control unit detects the friction coefficients at different positions, and divides the friction coefficients at different positions into different color blocks to form a color block diagram.

[0063] Embodiment three:

[0064] In this embodiment, the connecting member is a rigid rotating arm 43 with adjustable length. The driving unit 42 is connected to the moving unit 41 through the rotating arm to drive the moving unit 41 to rotate. The position detection unit is an angle sensor for detecting the angle of the rotating arm relative to the x-axis direction. The driving unit 42 includes a torque sensor for detecting the torque of the rotating arm. In this embodiment, the angle α between the rotating arm 43 and the x-axis is detected. The rotating arm 43 is retractable, so it is necessary to add a sensor to detect the distance between the driving unit 42 and the moving unit 41. The sensor is a part of the driving unit 42. The moving unit 41 includes an acceleration sensor for detecting the motion state of the moving unit. The torque output of the driving unit 42 is adjusted in coordination with the torque sensor, so that the uniform rotation of the moving unit 41 can be achieved, and the magnitude of the dynamic friction force in this state can be calculated.

[0065] The friction coefficient detection method corresponding to this embodiment includes the following steps:

[0066] S1: Set a detection area, place the building aging-friendly friction coefficient detection device 100 in the detection area; establish a boundary within the detection area, install a positioning baffle 1, and use an intersection point of the vertically intersecting positioning baffles as the origin o(0, 0) of the detection area;

[0067] S10: Stretch the rotating arm to its longest length, which is r, and the positioning unit obtains the initial position of the detection module 2 as (xo, yo);

[0068] S11: Adjust the weight of the counterweight block and adjust the pressure N acting on the ground so that the pressure during the test is within the linear test area of ​​the pressure sensor;

[0069] S2: The control unit controls the driving unit 42 to drive the motion unit 41 to move at a constant speed until the constant speed motion trajectory of the motion unit 41 covers the detection area; in this embodiment, the control unit controls the driving unit 42 to output torque, driving the rotating arm 43 and the motion unit 41 to rotate at a constant speed in the circumferential direction until the motion unit 41 rotates more than 360 degrees, and then shortens the length of the rotating arm 43, so that the next motion trajectory of the motion unit 41 overlaps with the previous motion trajectory as little as possible, and no gap is generated. Repeat several times, detect the area with the driving unit 42 as the center and r as the radius, move the driving unit 42 to the next position, and repeat the detection steps until the motion trajectory covers the detection area.

[0070] S3: The control unit detects the torque provided by the driving unit 42 at any time i when the motion unit 41 moves, and the pressure Ni at this position. The state of uniform movement is detected by the acceleration sensor and determined by the control unit. Under the condition of uniform rotation, the value of the friction force Fi is equal to the torque Mi / ri of the driving unit 42, where Mi refers to the torque output by the driving unit 42 at any time i, and ri refers to the length of the rotating arm at any time i. The friction coefficient μ(xi, yi) = Fi / Ni at this position is calculated. At time i of the motion process, the relative position (xi, yi) of the motion unit 41 relative to the center can also be expressed as (ri·cos(αi), ri·sin(αi)), and the friction coefficient at the relative position is: μ(ri·cos(αi), ri·sin(αi)) = Mi / ri / Ni, which is converted into the detection area coordinates: μ(xo+ri·cos(αi), yo+ri·sin(αi)) = Mi / ri / Ni. If multiple friction coefficients are obtained after multiple tests at the same location, the average value of the multiple friction coefficients is taken.

[0071] There are some corners in the entire detection area that cannot be reached by circular motion. The rotating arm 43 of the detection module 4 can slide in a short arc in this area to minimize the area of ​​the undetected area, or the detection module 4 can be partially located outside the detection area for detection of corner positions.

[0072] In step S3, the control unit detects the friction coefficients at different positions, and divides the friction coefficients at different positions into different color blocks to form a color block diagram.

[0073] like Figure 5 As shown, the friction coefficient gradually changes from red, yellow, blue, and green from low to high to form a friction coefficient color block diagram, and the concave and convex surface alarm position is represented by black. In addition, the size of each color block can be the same as the size of the friction plate of the motion unit 21. The specific color is not shown in the figure, it is only a grayscale image. In actual use, different colors can be selected as needed to display more intuitively.

[0074] The motion unit can have a variety of shapes and sizes, and the detection size of the motion unit is recommended to be between 1 square centimeter and 5 square centimeters. Each time the motion unit is tested, a set of friction coefficients associated with the position of the detection area will be formed. The entire detection process will perform multiple tests at the same position or a position close to it, resulting in multiple friction coefficients. In the entire detection area, a particle size side length △ is set according to actual needs. In the square area of ​​the particle size with △ as the side length, the friction coefficients of each test are averaged, and the average friction coefficient is used to characterize the friction coefficient of the particle size range. The friction coefficient gradually changes from red, yellow, blue, and green from low to high to form a friction coefficient color block diagram, forming a friction coefficient color block diagram.

[0075] The color block diagram can show the friction coefficient at different locations in the entire area. With this color block diagram, repairs can be carried out at locations where the friction coefficient is below the standard value. The color block diagram is calculated by the control unit and output for display.

[0076] The building aging-friendly friction coefficient detection device 100 and friction coefficient detection method of the present invention can dynamically obtain the friction coefficient of each point in the area and summarize and organize them, so that users can intuitively understand the friction coefficients of different positions, which is conducive to repairing the positions where the friction coefficient is lower than the standard value, avoiding safety problems caused by slippery ground when the elderly travel.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A building aging-friendly friction coefficient detection device, characterized in that: The building aging-friendly friction coefficient detection device includes a detection module, which includes a motion unit, a driving unit for driving the motion unit to move and detect the magnitude of dynamic friction, a position detection unit for detecting the position of the motion unit, a pressure sensor installed on the motion unit for detecting the pressure value of the motion unit acting on the detection surface, a positioning unit for detecting the position of the detection module, a control unit and a transfer unit, the control unit is electrically connected to the positioning unit, the driving unit, the position detection unit and the pressure sensor, the positioning unit is used to position the detection module, the transfer unit is connected to the driving unit and the motion unit to drive the detection module to other positions, the driving unit is connected to the motion unit through a pull rope to drive the motion unit to approach or move away from the driving unit, the driving unit includes a tension sensor for detecting the tension of the pull rope, the position detection unit is a distance sensor and an angle sensor, the distance sensor is fixed on the driving unit to detect the relative position of the motion unit and the driving unit, and the angle sensor is used to detect the angle of the pull rope relative to one direction.

2. The building aging-friendly friction coefficient detection device according to claim 1 is characterized by: The building aging-friendly friction coefficient detection device also includes a positioning baffle, which defines a detection area, and the detection module is located in the detection area.

3. The building aging-friendly friction coefficient detection device according to claim 1 is characterized in that: The motion unit comprises a friction plate arranged at the bottom and in contact with the detection surface, and a counterweight block arranged above the friction plate and used for providing downward pressure.

4. The building aging-friendly friction coefficient detection device according to claim 1 is characterized by: The detection module also includes an acceleration sensor for obtaining the real-time motion state of the motion unit.

5. The building aging-friendly friction coefficient detection device according to claim 1 is characterized by: The position detection unit is one or more of a laser displacement sensor, an angle sensor or a distance measurement sensor.

6. A method for detecting a friction coefficient, characterized in that: The friction coefficient detection method adopts the building aging-friendly friction coefficient detection device as described in any one of claims 1 to 5, and comprises the following steps: S1: Set a detection area, place the building aging friction coefficient detection device in the detection area; establish a boundary in the detection area, install a positioning baffle, and use one of the intersection points of the vertically intersecting positioning baffles as the origin o(0, 0) of the detection area; S10: stretch the motion unit to the position farthest from the driving unit, and the positioning unit obtains the initial value of the detection module as (xo, yo); S11: Adjust the weight of the counterweight block and adjust the pressure N acting on the ground so that the pressure during the test is within the linear test area of ​​the pressure sensor; S2: The control unit controls the driving unit to drive the motion unit to move at a constant speed until the constant speed motion trajectory of the motion unit covers the detection area; the control unit controls the driving unit to output a pulling force to drive the motion unit to move in a radial direction at a constant speed until the motion unit contacts the driving unit, and then the transfer unit or manually moves the driving unit and the motion unit in a circular direction for a certain angle, so that there is no gap between the next motion trajectory of the motion unit and the previous motion trajectory, and repeats multiple times to make the motion trajectory cover the detection area; S3: The control unit detects the pulling force provided by the driving unit at any time i when the moving unit moves, the pressure Ni at this position, and the state of uniform movement is detected by the acceleration sensor and judged by the control unit. In the uniform movement state, the friction force Fi is equal to the pulling force of the driving unit, and the friction coefficient μ(xi, yi)=Fi / Ni at this position is calculated. At time i of the movement process, the relative position (xi, yi) of the moving unit relative to the center is expressed as (ri·cos(αi), ri·sin(αi)), and the friction coefficient at the relative position is: μ(ri·cos(αi), ri·sin(αi))=Fi / Ni, which is converted into the detection area coordinates: μ(xo+ri·cos(αi), yo+ri·sin(αi))=Fi / Ni. If multiple friction coefficients are obtained after multiple detections at the same position, the average value of the multiple friction coefficients is taken; In step S3, the control unit detects the friction coefficients at different positions, and divides the friction coefficients at different positions into different color blocks to form a color block diagram.

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