Escalator acceleration measuring device

Abstract

The utility model discloses an escalator acceleration measuring device which comprises a mounting plate, an acceleration measuring module and a clamping module. The acceleration measurement module comprises a sensor shell and a three-axis acceleration sensor, the sensor shell is mounted on the mounting plate, and the three-axis acceleration sensor is mounted in the inner space of the sensor shell; the clamping module comprises a fixed clamping block, a movable clamping block and a cam rotating shaft, the fixed clamping block is mounted on the first side of the bottom of the mounting plate, the movable clamping block is movably mounted on the second side of the bottom of the mounting plate through the cam rotating shaft, and an adjustable clamping space is formed between the fixed clamping block and the movable clamping block. The fixed clamping block is matched with the movable clamping block, the three-axis acceleration sensor is clamped on a step of an escalator, the position of the movable clamping block is adjusted through rotation of the cam rotating shaft, the three-axis acceleration sensor can be rapidly and fixedly installed on and detached from the step, and it is guaranteed that measured step acceleration data is accurate and reliable; and the measurement efficiency and the measurement accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of escalator detection, in particular to an acceleration measuring device for an escalator. Background Art

[0002] Escalators belong to special electromechanical equipment involving public safety. Escalator accidents often have a bad social impact. Detecting the safety performance of escalators is an important means to ensure the safe and stable operation of escalators.

[0003] Usually, the vibration comfort of the steps is evaluated by measuring the vibration acceleration. The existing measuring device uses a rotary encoder in cooperation with a speed measuring roller for measurement. The speed measuring roller contacts the moving steps, and the speed and displacement of the escalator can be measured. However, due to the vibration of the escalator itself, it is difficult to fix the measuring device on the step surface during the measurement process, resulting in problems such as difficult installation and disassembly. Moreover, since the contact time between the speed measuring roller and the steps is relatively short, the measuring device cannot continuously measure the vibration acceleration of the steps over a period of time, and does not reflect the true vibration state of the measured steps, leading to inaccurate detection results. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an acceleration measuring device for an escalator, which can be quickly installed and disassembled on the steps, will not generate additional vibration during the acquisition process of the running acceleration of the escalator, ensure the accuracy and reliability of the measured step acceleration data, and improve the measurement efficiency and accuracy.

[0005] An embodiment of the utility model provides an acceleration measuring device for an escalator, including a mounting plate, an acceleration measuring module, and a clamping module. The acceleration measuring module includes a sensor housing and a triaxial acceleration sensor. The sensor housing is installed on the mounting plate, and the triaxial acceleration sensor is installed in the internal space of the sensor housing. The clamping module includes a fixed clamping block, a movable clamping block, and a cam rotating shaft. The fixed clamping block is installed on the first side at the bottom of the mounting plate, the movable clamping block is movably installed on the second side at the bottom of the mounting plate through the cam rotating shaft, and an adjustable clamping space is formed between the fixed clamping block and the movable clamping block.

[0006] According to some embodiments of the utility model, the mounting plate is provided with a through hole, and the cam rotating shaft passes through the through hole.

[0007] According to some embodiments of the utility model, the cam rotating shaft includes a rotating shaft and a cam connected to each other. The rotating shaft is installed on the cam, and the axis of the rotating shaft and the center of the cam are not on the same axis.

[0008] According to some embodiments of the present utility model, a jack is provided at the upper part of the rotating shaft, and a rotating rod is inserted into the jack.

[0009] According to some embodiments of the present utility model, an external thread is provided at the upper part of the rotating shaft.

[0010] According to some embodiments of the present utility model, a spring, a washer and a nut are sequentially sleeved on the rotating shaft. The first end of the spring abuts against the top of the mounting plate, the second end of the spring abuts against the washer, and the nut is provided with an internal thread adapted to the external thread.

[0011] According to some embodiments of the present utility model, the movable clamping block is provided with a counterbore, an eccentric hole and a limiting hole. The diameter of the counterbore matches the diameter of the cam. The eccentric hole is arranged in the counterbore, and the diameter of the eccentric hole matches the shaft diameter of the rotating shaft.

[0012] According to some embodiments of the present utility model, the fixed clamping block includes a first fixing part and a first clamping part connected to each other, and the movable clamping block includes a second fixing part and a second clamping part connected to each other.

[0013] According to some embodiments of the present utility model, slope surfaces are provided on both sides of the first clamping part and the second clamping part.

[0014] According to some embodiments of the present utility model, the three-axis acceleration sensor is a three-axis accelerometer.

[0015] The embodiments of the present utility model at least have the following beneficial effects:

[0016] The automatic escalator acceleration measurement device provided by the present utility model includes a mounting plate, an acceleration measurement module and a clamping module. The acceleration measurement module includes a sensor housing and a three-axis acceleration sensor, and the sensor housing is mounted on the mounting plate; the clamping module includes a fixed clamping block, a movable clamping block and a cam rotating shaft. The fixed clamping block is mounted on the first side at the bottom of the mounting plate, and the movable clamping block is movably mounted on the second side at the bottom of the mounting plate through the cam rotating shaft. An adjustable clamping space is formed between the fixed clamping block and the movable clamping block. By cooperating between the fixed clamping block and the movable clamping block, the three-axis acceleration sensor is clamped on the step of the escalator. By rotating the cam rotating shaft to adjust the position of the movable clamping block, rapid fixed installation and disassembly of the three-axis acceleration sensor on the step are realized. No additional vibration is generated during the process of the three-axis acceleration sensor collecting the running acceleration of the escalator, ensuring the accuracy and reliability of the measured step acceleration data, and improving the measurement efficiency and measurement accuracy.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural view of an escalator acceleration measuring device according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 an exploded structural view of the escalator acceleration measuring device shown;

[0021] Figure 3 is Figure 2 a schematic structural view of the mounting plate of the escalator acceleration measuring device shown;

[0022] Figure 4 is Figure 2 a schematic structural view of the cam rotating shaft of the escalator acceleration measuring device shown;

[0023] Figure 5 is Figure 2 a schematic structural view of the movable clamping block of the escalator acceleration measuring device shown;

[0024] Figure 6 is Figure 2 a schematic structural view of the fixed clamping block of the escalator acceleration measuring device shown;

[0025] Figure 7 is a schematic structural view of the escalator acceleration measuring device and an escalator step according to an embodiment of the present utility model.

[0026] Reference Signs:

[0027] Mounting plate 100, through hole 110, acceleration measuring module 200, sensor housing 210;

[0028] Clamping module 300, fixed clamping block 310, first fixing part 311, first clamping part 312, ramp surface 313, movable clamping block 320, counterbore 321, eccentric hole 322, limiting hole 323, second fixing part 324, second clamping part 325, cam rotating shaft 330, rotating shaft 331, cam 332, external thread 333, jack 334, spring 340, washer 350, nut 360, lever 370;

[0029] Step 400, step tooth groove 410. Detailed Embodiments

[0030] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model.

[0032] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present utility model, unless otherwise clearly defined, words such as "arranged", "installed", "connected", and "coupled" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0034] Acceleration is a commonly used indicator to represent the intensity of vibration and the accelerating and decelerating states during operation. In addition to measuring vibration comfort, an acceleration sensor can also measure the speed of the escalator and the braking parameters. Integrating the acceleration can calculate the operating speed and displacement of the steps, and thus parameters such as the braking distance and braking time of the escalator can be analyzed. When using an acceleration sensor for measurement, the installation problem of the acceleration sensor needs to be considered. First, it is not advisable to directly place the acceleration sensor on the step surface for measurement. Placing the acceleration sensor directly on the step surface, due to the vibration of the escalator itself, it is difficult to fix the acceleration sensor on the step surface during the test, and the relative movement between the acceleration sensor itself and the step surface will affect the accuracy of the measured acceleration. Second, it is not advisable to use the pasting method to fix the acceleration sensor. Pasting materials such as glue and tape are usually flexible and deformable materials, which may play a buffering role in the process of transmitting the step vibration to the acceleration sensor, and it is difficult to ensure that the acceleration sensor is completely fixed on the step surface, affecting the accuracy of the measurement results. Third, the integrity of the step cannot be damaged during the measurement process, and the acceleration sensor cannot be fixed by methods such as drilling and screwing, which will cause damage to the escalator. Fourth, the acceleration sensor cannot be fixed by magnetic attraction. The steps are usually made of aluminum alloy materials and do not have magnetism, so the acceleration sensor cannot be fixed by magnetic attraction. Therefore, the acceleration measurement device for the escalator requires a mechanical structure fixture to quickly install the acceleration sensor on the escalator and obtain accurate acceleration data.

[0035] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Please refer to Figure 1 and Figure 2, this embodiment discloses an escalator acceleration measurement device, including a mounting plate 100, an acceleration measurement module 200, and a clamping module 300; the acceleration measurement module 200 includes a sensor housing 210 and a triaxial acceleration sensor, the sensor housing 210 is installed on the mounting plate 100, and the triaxial acceleration sensor is installed in the internal space of the sensor housing 210; the clamping module 300 includes a fixed clamping block 310, a movable clamping block 320, and a cam rotating shaft 330, the fixed clamping block 310 is installed on the first side at the bottom of the mounting plate 100, the movable clamping block 320 is movably installed on the second side at the bottom of the mounting plate 100 through the cam rotating shaft 330, and an adjustable clamping space is formed between the fixed clamping block 310 and the movable clamping block 320. By cooperating between the fixed clamping block 310 and the movable clamping block 320, the triaxial acceleration sensor is clamped on the step 400 of the escalator. By rotating the cam rotating shaft 330 to adjust the position of the movable clamping block 320, the rapid fixed installation and disassembly of the triaxial acceleration sensor on the step 400 are realized. During the process of the triaxial acceleration sensor collecting the running acceleration of the escalator, no additional vibration will be generated, ensuring the accuracy and reliability of the measured step acceleration data and improving the measurement efficiency and accuracy.

[0037] Please refer to Figure 3 , the mounting plate 100 is provided with a through hole 110, and the cam rotating shaft 330 passes through the through hole 110. The cam rotating shaft 330 passes through the movable clamping block 320 and the through hole 110 from bottom to top, and movably installs the movable clamping block 320 at the bottom of the mounting plate 100.

[0038] Please refer to Figure 4 , the cam rotating shaft 330 includes a rotating shaft 331 and a cam 332 connected to each other, the rotating shaft 331 is installed on the cam 332, and the axis of the rotating shaft 331 and the center of the cam 332 are not on the same axis. Through the asymmetric design between the rotating shaft 331 and the cam 332, when the cam rotating shaft 330 rotates, it drives the movable clamping block 320 to move, adjusts the position of the movable clamping block 320 relative to the mounting plate 100, and thus clamps the measurement device on the step 400 of the escalator.

[0039] Please refer to Figure 4 , an insertion hole 334 is provided at the upper part of the rotating shaft 331, and a rotating rod 370 is inserted into the insertion hole 334. The cam rotating shaft 330 is rotated labor-savingly through the rotating rod 370 to change the position of the movable clamping block 320, and the measurement device is clamped on the step 400 of the escalator. The rotating rod 370 drives the cam rotating shaft 330 to rotate. If it cannot rotate, it means it has been clamped; rotating the rotating rod 370 in the opposite direction will loosen the movable clamping block 320 to realize disassembly.

[0040] Please refer to Figure 4, the upper part of the rotating shaft 331 is provided with an external thread 333; the rotating shaft 331 is sequentially sleeved with a spring 340, a washer 350 and a nut 360 from bottom to top, the first end of the spring 340 abuts against the top of the mounting plate 100, the second end of the spring 340 abuts against the washer 350, and the nut 360 is provided with an internal thread matched with the external thread 333. The nut 360 is threadedly connected to the rotating shaft 331, and the connection is reliable and easy to assemble and disassemble; the spring pressure of the spring 340 makes the movable clamp 320 closely fit the mounting plate 100 under the pull of the cam rotating shaft 330, realizing a flexible connection rather than a fixed connection, and achieving the effects of vibration isolation, noise reduction and displacement prevention.

[0041] Please refer to Figure 5 The movable clamp 320 is provided with a counterbore 321, an eccentric hole 322 and a limiting hole 323. The diameter of the counterbore 321 matches the diameter of the cam 332. The eccentric hole 322 is arranged in the counterbore 321. The diameter of the eccentric hole 322 matches the shaft diameter of the rotating shaft 331. The cam rotating shaft 320 can rotate in the counterbore 321 of the movable clamp 320 to adjust the lateral position of the cam 322, thereby changing the relative position between the movable clamp 320 and the mounting plate 100, and driving the movable clamp 320 to clamp the step 400. The limiting screw is fixedly installed on the back of the mounting plate 100, located in the limiting hole 323, and cooperates with the limiting hole 323 to limit the range of motion of the movable clamp 320, so as to prevent the movable clamp 320 from excessively rotating around the cam rotating shaft 330, so that the angle between the movable clamp 320 and the fixed clamp 310 is not too large, which is convenient for quick clamping.

[0042] Please refer to Figure 5 and Figure 6 The fixed clamp block 310 includes a first fixed portion 311 and a first clamping portion 312 connected to each other, and the movable clamp block 320 includes a second fixed portion 324 and a second clamping portion 325 connected to each other. Both sides of the first clamping portion 312 and the second clamping portion 325 are provided with a slope surface 313. During the measurement process, if the operation is improper and the escalator fails to stop in time, the acceleration measuring device fixed on the step may collide with the comb teeth at the entrance and exit of the escalator, causing damage to the comb teeth. Both sides of the lower part of the first clamping portion 312 and the second clamping portion 325 are slope surfaces 313. In an unexpected situation, when the measuring device collides with the comb teeth at the entrance and exit of the escalator, the collision process is a slope contact, so that the measuring device gradually moves up and detaches from the step 400, thereby realizing automatic disassembly, avoiding damage to the comb teeth, and improving measurement safety.

[0043] It should be noted that, in some embodiments, the three-axis acceleration sensor is a three-axis accelerometer.

[0044] When measuring, please refer to Figure 7, place the escalator acceleration measuring device on the step 400 of the escalator. Insert the first clamping portion 312 and the second clamping portion 325 into the step tooth groove 410, and then insert the rotating rod 370 into the jack 334. Rotate the cam rotating shaft 330 by the rotating rod 370 to change the position of the movable clamping block 320, and clamp the measuring device on the step 400. The rotating rod 370 drives the cam rotating shaft 330 to rotate. If it cannot rotate, it means it is already clamped. After clamping, measure the acceleration of the escalator. By cooperating between the fixed clamping block 310 and the movable clamping block 320, the triaxial acceleration sensor is clamped on the step 400 of the escalator. By rotating the cam rotating shaft 330 to adjust the position of the movable clamping block 320, rapid fixed installation and disassembly of the triaxial acceleration sensor on the step 400 are achieved. In addition, during the measurement process, if the braking ability of the escalator itself is insufficient, or the tester operates incorrectly and fails to stop the escalator in time, resulting in the step 400 that fails to stop moving in time, when the inclined planes 313 of the first clamping portion 312 and the second clamping portion 325 contact the comb teeth of the escalator, it can be automatically and quickly disassembled, effectively avoiding the frontal impact of the measuring device with the comb teeth, and not causing damage to the escalator components during the test, improving the measurement safety.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. An escalator acceleration measurement device, characterized in that, Comprising: Mounting plate (100); Acceleration measurement module (200), the acceleration measurement module (200) includes a sensor housing (210) and a triaxial acceleration sensor, the sensor housing (210) is mounted on the mounting plate (100), and the triaxial acceleration sensor is installed in the internal space of the sensor housing (210); Clamping module (300), the clamping module (300) includes a fixed clamping block (310), a movable clamping block (320) and a cam rotating shaft (330), the fixed clamping block (310) is mounted on the first side of the bottom of the mounting plate (100), the movable clamping block (320) is movably mounted on the second side of the bottom of the mounting plate (100) through the cam rotating shaft (330), and an adjustable clamping space is formed between the fixed clamping block (310) and the movable clamping block (320).

2. The escalator acceleration measuring device according to claim 1, characterized in that The mounting plate (100) is provided with a through hole (110), and the cam rotating shaft (330) passes through the through hole (110).

3. The escalator acceleration measuring device according to claim 2, characterized in that, The cam rotating shaft (330) includes a rotating shaft (331) and a cam (332) connected to each other, the rotating shaft (331) is mounted on the cam (332), and the axis of the rotating shaft (331) and the center of the cam (332) are not on the same axis.

4. The escalator acceleration measuring device according to claim 3, characterized in that, An insertion hole (334) is provided in the upper part of the rotating shaft (331), and a rotating rod (370) is inserted into the insertion hole (334).

5. The escalator acceleration measuring device according to claim 3, characterized in that, External threads (333) are provided in the upper part of the rotating shaft (331).

6. The escalator acceleration measuring device according to claim 5, characterized in that, The rotating shaft (331) is sequentially sleeved with a spring (340), a washer (350) and a nut (360), the first end of the spring (340) abuts against the top of the mounting plate (100), the second end of the spring (340) abuts against the washer (350), and the nut (360) is provided with internal threads adapted to the external threads (333).

7. The escalator acceleration measurement device according to claim 3, characterized in that The movable clamping block (320) is provided with a counterbore (321), an eccentric hole (322) and a limiting hole (323), the diameter of the counterbore (321) matches the diameter of the cam (332), the eccentric hole (322) is provided in the counterbore (321), and the diameter of the eccentric hole (322) matches the shaft diameter of the rotating shaft (331).

8. The escalator acceleration measuring device according to claim 1, characterized in that, The fixed clamping block (310) includes a first fixed part (311) and a first clamping part (312) connected to each other, and the movable clamping block (320) includes a second fixed part (324) and a second clamping part (325) connected to each other.

9. The escalator acceleration measuring device according to claim 8, wherein, Slope surfaces (313) are provided on both sides of the first clamping part (312) and the second clamping part (325).

10. The escalator acceleration measurement device according to any one of claims 1 to 9, characterized in that The triaxial acceleration sensor is a triaxial accelerometer.

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