A speed measuring device for facilitating detection of belt sag

Abstract

The utility model discloses a kind of speed measuring device facilitating detection of belt sinking, it is related to belt detection technical field, including rack, the side of the rack is equipped with belt, the side of the belt is equipped with support, the one end of the support is equipped with positioning assembly for facilitating device installation work is carried out.The utility model has beneficial effect as follows: the bottom detection end of pressure sensor is contacted with the outer surface of belt by first adjusting component, thus can detect whether belt appears sinking condition due to insufficient tension, so as to ensure the accuracy of belt running speed monitoring value;Speed measuring component is driven into the inside of belt by second adjusting component, the actual running speed of belt can be obtained by indirect transmission mode using runner, transmission shaft, speed measuring wheel, proximity switch sensor, so that the real-time monitoring of belt running speed is realized, and the running condition of conveying belt and other transport equipment can be conveniently understood by staff.

Description

Technical Field

[0001] This utility model relates to the field of belt detection technology, and in particular to a speed measuring device that facilitates the detection of belt sagging. Background Technology

[0002] Belt drive is a common mechanical transmission method that uses the friction or meshing between the belt and pulley to transmit motion and power. In industrial production lines, belt drive is often used to drive conveyor belts and other transportation equipment. Since the speed of conveyor belts and other transportation equipment usually needs to be adjusted to meet production needs, workers use speed measuring devices to monitor the belt speed in real time in order to detect abnormal conveyor belt speeds in a timely manner and take corresponding protective measures to prevent equipment failures or production accidents.

[0003] When using existing speed measuring devices, most of them generally lack the function of detecting whether the belt is sinking. This means that when the belt sinks and vibrates due to insufficient tension, the staff cannot promptly understand the specific situation of the belt. Similarly, the speed measuring device cannot accurately measure the actual running speed of the belt. This can lead to misjudgment of the belt's running speed by the staff, making it impossible to adjust the transportation equipment in a timely manner. This has a certain impact on the accuracy of the speed measurement results and is not conducive to the stable operation of the transportation equipment. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A speed measuring device for facilitating the detection of belt sinking includes a frame, a belt on one side of the frame, a bracket on one side of the belt, a positioning component at one end of the bracket to facilitate the installation of the device, a control compartment fixedly connected to the top of one side of the bracket, and a controller installed inside the control compartment.

[0007] A pressure sensor is provided above the belt, and a first adjustment component is provided on the top of the bracket to adjust the position of the pressure sensor. An L-shaped plate is provided on one side of the bracket, and a speed measuring component for monitoring the belt running speed is provided on one side of the L-shaped plate. The first adjustment component and the pressure sensor are both connected to the controller terminal via a data cable.

[0008] A support plate is provided above the L-shaped plate. One end of the support plate is connected to the bracket. A second adjustment component is provided on the top of the support plate to adjust the position of the speed measuring component. The second adjustment component is connected to the controller terminal via a data cable.

[0009] As a preferred embodiment of the speed measuring device for easily detecting belt sinking described in this utility model, the first adjusting component includes a first hydraulic cylinder fixed to the top of the bracket. The bottom end of the first hydraulic cylinder extends through to the outside of the bracket and is fixedly connected to a strip plate. One end of the strip plate is provided with a first mounting groove. The pressure sensor is fixedly installed inside the first mounting groove. The first hydraulic cylinder is connected to the controller terminal via a data cable.

[0010] As a preferred embodiment of the speed measuring device for detecting belt sinking described in this utility model, the speed measuring component includes a second mounting groove disposed inside an L-shaped plate, a drive shaft being coaxially rotatably connected inside the second mounting groove, a rotating wheel being fixedly connected to the outer side of the drive shaft away from the bracket, the rotating wheel being engaged with the belt, and a speed measuring wheel being fixedly connected to the other end of the drive shaft.

[0011] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, a fixed base is provided below the speed measuring wheel, one side of the fixed base is connected to an L-shaped plate, a proximity switch sensor is fixedly installed inside the fixed base, and the proximity switch sensor is connected to the controller terminal via a data cable.

[0012] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, wherein: the bracket has a through groove corresponding to the speed measuring wheel inside, and one side of the L-shaped plate extends through to the outside of the through groove.

[0013] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, the second adjusting component includes a second hydraulic cylinder fixed to the top of the support plate. One end of the second hydraulic cylinder extends through to the outside of the bracket and is fixedly connected to a support base. The bottom of the support base is connected to an L-shaped plate. The second hydraulic cylinder is connected to the controller terminal via a data cable.

[0014] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, the top of the L-shaped plate is fixedly connected to a slider, the bottom of the support plate is provided with a groove corresponding to the slider, and the slider is located inside the groove.

[0015] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, the positioning component includes a countersunk hole at one end of the bracket, and multiple countersunk holes are provided. Each countersunk hole is provided with a mounting bolt inside. The top of the frame is provided with an internal thread groove corresponding to the mounting bolt, and the bottom end of the mounting bolt is spirally connected to the internal thread groove.

[0016] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, wherein: an LCD touch screen is fixedly installed inside the control compartment, the LCD touch screen is connected to the controller via a digital display, a control button is provided on one bottom side of the control compartment, and an audible and visual alarm is fixedly installed on both sides of the control compartment, and the control button and the audible and visual alarm are all connected to the controller terminal via data cables.

[0017] As a preferred embodiment of the speed measuring device for facilitating the detection of belt sinking described in this utility model, one end of the bracket is provided with a reinforcing plate to improve the overall support strength of the device.

[0018] The beneficial effects of this utility model are as follows: the first adjustment component drives the bottom detection end of the pressure sensor to contact the outer surface of the belt, thereby detecting whether the belt is sinking due to insufficient tension, which helps to ensure the accuracy of the belt running speed monitoring value; the second adjustment component drives the speed measuring component into the belt, and the actual running speed of the belt can be obtained indirectly through the rotation wheel, drive shaft, speed measuring wheel, and proximity switch sensor, thus realizing real-time monitoring of the belt running speed, which makes it convenient for staff to understand the operation status of conveyor belts and other transportation equipment in a timely manner. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 A schematic diagram of the overall structure of a speed measuring device for detecting belt sagging.

[0021] Figure 2 Another perspective view of the overall structure of the speed measuring device for detecting belt sagging.

[0022] Figure 3 A detailed structural diagram of the bracket for a speed measuring device designed to facilitate the detection of belt sagging.

[0023] Figure 4A structural diagram of the positioning component of a speed measuring device for facilitating the detection of belt sagging.

[0024] Figure 5 A detailed structural diagram of the control compartment of the speed measuring device for facilitating the detection of belt sagging.

[0025] Figure 6 The structural diagram of the first adjustment component of the speed measuring device for facilitating the detection of belt sagging.

[0026] Labels in the diagram: 1. Frame; 2. Belt; 3. Support; 4. Control compartment; 5. Pressure sensor; 6. First adjustment assembly; 61. First hydraulic cylinder; 62. Strip plate; 63. First mounting slot; 7. Support plate; 8. L-shaped plate; 9. Second adjustment assembly; 91. Second hydraulic cylinder; 92. Support base; 10. Slide groove; 11. Slider; 12. Speed ​​measuring assembly; 121. Drive shaft; 122. Rotary wheel; 123. Second mounting slot; 124. Speed ​​measuring wheel; 13. Through groove; 14. Control button; 15. LCD touch screen; 16. Audible and visual alarm; 17. Reinforcing plate; 18. Positioning assembly; 181. Countersunk hole; 182. Internal threaded groove; 183. Mounting bolt; 19. Fixing base; 20. Proximity switch sensor. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0030] Example 1:

[0031] Reference Figures 1-6 This is the first embodiment of the present invention. This embodiment provides a speed measuring device for easy detection of belt sinking, including a frame 1, a belt 2 on one side of the frame 1, a bracket 3 on one side of the belt 2, a positioning component 18 at one end of the bracket 3 to facilitate the installation of the device, and a control chamber 4 fixedly connected to the top of one side of the bracket 3. A controller is installed inside the control chamber 4.

[0032] It should be noted that the controller can be a PLC controller or a microcontroller. In actual use, the positioning component 18 can be used to install this device on the frame 1 of the conveyor or other transportation equipment. The controller can then be used to centrally control other electronic devices, which facilitates the coordination of the operation of each electronic device and makes it easier to monitor the speed of the belt 2.

[0033] A pressure sensor 5 is provided above the belt 2. A first adjustment component 6 is provided on the top of the bracket 3 to adjust the position of the pressure sensor 5. An L-shaped plate 8 is provided on one side of the bracket 3. A speed measuring component 12 for monitoring the running speed of the belt 2 is provided on one side of the L-shaped plate 8. The first adjustment component 6 and the pressure sensor 5 are both connected to the controller terminal via a data cable.

[0034] To improve the accuracy of the belt 2 speed monitoring data, before monitoring the belt 2 speed, it is necessary to ensure that the belt 2 is not in a state of insufficient tension and sagging. Therefore, the operator can use the controller to activate the first adjustment component 6. The first adjustment component 6 will cause the bottom detection end of the pressure sensor 5 to contact the outer surface of the belt 2. At this time, the pressure sensor 5 can detect the pressure between the first adjustment component 6 and the belt 2. When the pressure is lower than the preset threshold of the pressure sensor 5, it indicates that the belt 2 is insufficiently tensioned and has sagged. After the operator has completed the prerequisite of tensioning the belt 2, the belt 2 speed monitoring can continue. This can avoid the decrease in the accuracy of the monitoring data caused by the belt 2 sagging, and help ensure the accuracy of the belt 2 speed monitoring data.

[0035] A support plate 7 is provided above the L-shaped plate 8. One end of the support plate 7 is connected to the bracket 3. The top of the support plate 7 is provided with a second adjustment component 9 that can adjust the position of the speed measuring component 12. The second adjustment component 9 is connected to the controller terminal via a data cable.

[0036] When it is necessary to monitor the running speed of belt 2, the second adjustment component 9 can be used to drive the speed measuring component 12 into the belt 2. The speed measuring component 12 will rotate synchronously according to the transmission speed of belt 2, which is conducive to the monitoring of the running speed of belt 2. At the same time, the second adjustment component 9 can also be used to drive the speed measuring component 12 away from belt 2, so as to prevent the speed measuring component 12 from affecting the detection of belt 2 sinking.

[0037] Example 2:

[0038] Reference Figures 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0039] Specifically, the first adjustment component 6 includes a first hydraulic cylinder 61 fixed to the top of the bracket 3. The bottom end of the first hydraulic cylinder 61 extends through to the outside of the bracket 3 and is fixedly connected to a strip plate 62. One end of the strip plate 62 is provided with a first mounting groove 63. The pressure sensor 5 is fixedly installed inside the first mounting groove 63. The first hydraulic cylinder 61 is connected to the controller terminal via a data cable.

[0040] The first hydraulic cylinder 61 can drive the pressure sensor 5 located inside the first mounting groove 63 to contact the belt 2. After the piston column inside the first hydraulic cylinder 61 extends to a certain length, the pressure sensor 5 can detect the pressure between the first adjusting component 6 and the belt 2. Then, it is compared with the preset threshold of the pressure sensor 5 to detect whether the belt 2 has sagged due to insufficient tension. This helps to ensure the accuracy of the belt 2 running speed monitoring value.

[0041] Specifically, the speed measuring component 12 includes a second mounting groove 123 disposed inside the L-shaped plate 8. A drive shaft 121 is coaxially rotatably connected inside the second mounting groove 123. A rotating wheel 122 is fixedly connected to the outer side of the drive shaft 121 away from the bracket 3. The rotating wheel 122 meshes with the belt 2. A speed measuring wheel 124 is fixedly connected to the other end of the drive shaft 121.

[0042] In actual use, the pulley 122 should be selected to match the belt 2 to be monitored, so as to ensure stable meshing transmission between the pulley 122 and the belt 2. When the belt 2 is running, the pulley 122 will rotate with the belt 2. Then the pulley 122 drives the speed measuring wheel 124 to rotate synchronously through the transmission shaft 121. Therefore, the actual running speed of the belt 2 is obtained through indirect transmission. It should be noted that both the pulley 122 and the speed measuring wheel 124 have toothed structures and the same transmission ratio.

[0043] Specifically, a mounting base 19 is provided below the speed measuring wheel 124. One side of the mounting base 19 is connected to the L-shaped plate 8. A proximity switch sensor 20 is fixedly installed inside the mounting base 19. The proximity switch sensor 20 is connected to the controller terminal via a data cable.

[0044] It should be noted that the proximity switch sensor 20 is a magnetic induction proximity switch sensor, which is a sensor that works based on the principle of magnetic induction. It can detect objects non-contactly by sensing the change in the magnetic field generated when a metal object approaches. In this utility model, the proximity switch sensor 20 is set in the radial direction of the speed measuring wheel 124, and the detection end of the proximity switch sensor 20 corresponds to the outer teeth of the speed measuring wheel 124. When the speed measuring wheel 124 rotates due to the operation of the belt 2, the outer teeth of the speed measuring wheel 124 will pass through the gap between the two magnetic poles of the permanent magnet in sequence, causing the magnetic resistance and magnetic flux of the magnetic circuit to change periodically. This change will induce an AC voltage signal in the coil of the proximity switch sensor 20 with a frequency proportional to the gear speed. After the AC voltage signal is processed, the current running speed of the belt 2 can be obtained. In this way, the running speed of the belt 2 can be monitored in real time, which makes it convenient for the staff to understand the operating status of the conveyor belt and other transportation equipment in a timely manner, and facilitates the staff to adjust the running speed of the conveyor belt and other transportation equipment.

[0045] Specifically, the bracket 3 has a through groove 13 inside that corresponds to the speed measuring wheel 124, and one side of the L-shaped plate 8 extends through to the outside of the through groove 13.

[0046] By setting the through slot 13, the bracket 3 can be prevented from obstructing the operation of the second adjustment component 9, and the speed measuring component 12 can be moved to a position that will not hinder the downward movement of the pressure sensor 5, thus improving the rationality of the structure.

[0047] Specifically, the second adjustment component 9 includes a second hydraulic cylinder 91 fixed to the top of the support plate 7. One end of the second hydraulic cylinder 91 extends through to the outside of the bracket 3 and is fixedly connected to a support base 92. The bottom of the support base 92 is connected to the L-shaped plate 8. The second hydraulic cylinder 91 is connected to the controller terminal via a data cable.

[0048] When it is necessary to monitor the running speed of belt 2, the second hydraulic cylinder 91 can be used to drive the L-shaped plate 8 to move closer to one side of the frame 1 until the rotating wheel 122 on the speed measuring component 12 enters the interior of belt 2. This facilitates the monitoring of the running speed of belt 2. At the same time, the second hydraulic cylinder 91 can also drive the rotating wheel 122 on the speed measuring component 12 to leave the interior of belt 2, thus preventing the speed measuring component 12 from affecting the detection of belt 2 sinking.

[0049] Specifically, a slider 11 is fixedly connected to the top of the L-shaped plate 8, and a groove 10 corresponding to the slider 11 is opened at the bottom of the support plate 7, with the slider 11 located inside the groove 10.

[0050] By setting the slide groove 10 and the slider 11, the horizontal sliding of the L-shaped plate 8 can be made smoother, which helps to improve the working stability of the second adjustment component 9.

[0051] Example 3:

[0052] Reference Figures 4-6 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0053] Specifically, the positioning component 18 includes a countersunk hole 181 at one end of the bracket 3. Multiple countersunk holes 181 are provided, and each countersunk hole 181 is provided with a mounting bolt 183 inside. The top of the frame 1 is provided with an internal thread groove 182 corresponding to the mounting bolt 183, and the bottom end of the mounting bolt 183 is spirally connected to the internal thread groove 182.

[0054] When positioning and installing this utility model, the staff can pre-open an internal thread groove 182 at a suitable position on the frame 1 of the conveyor or other transportation equipment, and then the positioning and installation of the bracket 3 as a whole can be achieved by the cooperation between the mounting bolt 183 and the internal thread groove 182.

[0055] Specifically, an LCD touch screen 15 is fixedly installed inside the control compartment 4. The LCD touch screen 15 is connected to the controller via a digital display. A control button 14 is provided on the bottom side of one side of the control compartment 4. A sound and light alarm 16 is fixedly installed on both sides of the control compartment 4. The control button 14 and the sound and light alarm 16 are all connected to the controller terminal via data cables.

[0056] The start and stop of the pressure sensor 5, proximity switch sensor 20, first cylinder 61, and second cylinder 91 can be controlled by the control button 14. This facilitates the coordination of the belt 2 sinking detection and belt 2 running speed monitoring. The data detected by the pressure sensor 5 and proximity switch sensor 20 can be displayed on the LCD touch screen 15, which makes it easy for the staff to observe the detection data. When the running speed of belt 2 differs too much from the preset threshold of proximity switch sensor 20, the controller will activate the audible and visual alarm 16 to remind the staff to adjust the running speed of the conveyor belt and other transportation equipment in time, so as to prevent more serious production accidents.

[0057] Specifically, one end of the bracket 3 is provided with a reinforcing plate 17 to improve the overall support strength of the device.

[0058] By setting the reinforcing plate 17, the supporting strength of the end of the bracket 3 connected to the frame 1 is increased, which helps to prevent the bracket 3 from becoming loose or bending.

[0059] In use, the operator first installs the device on the frame 1 of the conveyor or other transport equipment using the positioning component 18. Then, the first adjustment component 6 drives the bottom detection end of the pressure sensor 5 to contact the outer surface of the belt 2. This allows the operator to detect whether the belt 2 is sinking due to insufficient tension. This avoids the decrease in the accuracy of the monitoring values ​​caused by the belt 2 sinking, and helps ensure the accuracy of the belt 2 running speed monitoring values. After the operator has completed the prerequisite of tensioning the belt 2, the pressure sensor 5 can be raised. Then, the second adjustment component 9 drives the speed measuring component 12 into the belt 2. The actual running speed of the belt 2 can be obtained indirectly through the transmission of the rotating wheel 122, the drive shaft 121, the speed measuring wheel 124, and the proximity switch sensor 20. This achieves real-time monitoring of the belt 2 running speed, which allows the operator to understand the operating status of the conveyor belt and other transport equipment in a timely manner and to adjust the running speed of the conveyor belt and other transport equipment.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A speed measuring device for easy detection of belt sagging, comprising a frame (1), characterized in that: The frame (1) has a belt (2) on one side, and a bracket (3) on one side of the belt (2). One end of the bracket (3) is provided with a positioning component (18) to facilitate the installation of the device. A control compartment (4) is fixedly connected to the top of one side of the bracket (3). A controller is installed inside the control compartment (4). A pressure sensor (5) is provided above the belt (2), and a first adjustment component (6) is provided on the top of the bracket (3) to adjust the position of the pressure sensor (5). An L-shaped plate (8) is provided on one side of the bracket (3), and a speed measuring component (12) for monitoring the running speed of the belt (2) is provided on one side of the L-shaped plate (8). The first adjustment component (6) and the pressure sensor (5) are both connected to the controller terminal via a data cable. A support plate (7) is provided above the L-shaped plate (8). One end of the support plate (7) is connected to the bracket (3). The top of the support plate (7) is provided with a second adjustment component (9) that can adjust the position of the speed measuring component (12). The second adjustment component (9) is connected to the controller terminal via a data cable.

2. The speed measuring device for facilitating the detection of belt sagging as described in claim 1, characterized in that: The first adjustment component (6) includes a first hydraulic cylinder (61) fixed to the top of the bracket (3). The bottom end of the first hydraulic cylinder (61) extends through to the outside of the bracket (3) and is fixedly connected to a strip plate (62). One end of the strip plate (62) is provided with a first mounting groove (63). The pressure sensor (5) is fixedly installed inside the first mounting groove (63). The first hydraulic cylinder (61) is connected to the controller terminal via a data cable.

3. The speed measuring device for facilitating the detection of belt sagging as described in claim 1, characterized in that: The speed measuring component (12) includes a second mounting groove (123) disposed inside the L-shaped plate (8). A drive shaft (121) is coaxially rotatably connected inside the second mounting groove (123). A rotating wheel (122) is fixedly connected to the outer side of one end of the drive shaft (121) away from the bracket (3). The rotating wheel (122) meshes with the belt (2). A speed measuring wheel (124) is fixedly connected to the other end of the drive shaft (121).

4. The speed measuring device for facilitating the detection of belt sagging as described in claim 3, characterized in that: A fixed base (19) is provided below the speed measuring wheel (124). One side of the fixed base (19) is connected to the L-shaped plate (8). A proximity switch sensor (20) is fixedly installed inside the fixed base (19). The proximity switch sensor (20) is connected to the controller terminal via a data cable.

5. The speed measuring device for facilitating the detection of belt sagging as described in claim 3, characterized in that: The bracket (3) has a through groove (13) inside that corresponds to the speed measuring wheel (124), and one side of the L-shaped plate (8) extends through to the outside of the through groove (13).

6. The speed measuring device for facilitating the detection of belt sagging as described in claim 1, characterized in that: The second adjustment component (9) includes a second cylinder (91) fixed to the top of the support plate (7). One end of the second cylinder (91) extends through the outside of the bracket (3) and is fixedly connected to a support base (92). The bottom of the support base (92) is connected to the L-shaped plate (8). The second cylinder (91) is connected to the controller terminal via a data cable.

7. The speed measuring device for facilitating the detection of belt sagging as described in claim 6, characterized in that: The top of the L-shaped plate (8) is fixedly connected to a slider (11), and the bottom of the support plate (7) is provided with a groove (10) corresponding to the slider (11), and the slider (11) is located inside the groove (10).

8. The speed measuring device for facilitating the detection of belt sagging as described in claim 1, characterized in that: The positioning component (18) includes a countersunk hole (181) at one end of the bracket (3). Multiple countersunk holes (181) are provided. Each countersunk hole (181) is provided with a mounting bolt (183). The top of the frame (1) is provided with an internal thread groove (182) corresponding to the mounting bolt (183). The bottom end of the mounting bolt (183) is spirally connected to the internal thread groove (182).

9. The speed measuring device for facilitating the detection of belt sagging as described in claim 1, characterized in that: The control compartment (4) is equipped with a liquid crystal touch screen (15), which is connected to the controller via a digital display. A control button (14) is provided on the bottom of one side of the control compartment (4), and an audible and visual alarm (16) is fixedly installed on both sides of the control compartment (4). The control button (14) and the audible and visual alarm (16) are connected to the controller terminal via a data cable.

10. The speed measuring device for facilitating the detection of belt sagging as described in claim 1, characterized in that: One end of the bracket (3) is provided with a reinforcing plate (17) to improve the overall support strength of the device.

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