An escalator step and skirt board gap measuring instrument and method

Abstract

The present invention relates to the field of safety detection of escalators, and discloses a measuring instrument for the gap between the escalator step and the skirt board, which includes a first strain sensor, a second strain sensor, a signal processing device, a display device and a sheet-shaped body of the ruler; the cross-section of the body of the ruler is a right triangle, a cantilever beam is arranged on the hypotenuse of the body of the ruler, the first strain sensor is installed at one end of the cantilever beam, a fixed beam is arranged on the short right-angle side of the body of the ruler, the second strain sensor is installed at one end of the fixed beam, the signal processing device and the display device are both installed on the body of the ruler, and the first strain sensor, the second strain sensor and the display device are all connected to the signal processing device. The present invention also discloses a method for measuring the gap between the escalator step and the skirt board. The beneficial effects are as follows: small in size and convenient to carry, the measurement result can be directly displayed numerically, the error caused by manual observation is eliminated, and the measurement accuracy and measurement efficiency are improved.

Description

Technical Field

[0001] The invention relates to the field of escalator safety detection, and in particular to an instrument and method for measuring the gap between escalator steps and apron plates. Background Art

[0002] With the continuous acceleration of my country's urbanization process, shopping malls, railway stations, airports, high-speed rail stations and other public places have increased rapidly. As a very important means of transportation in these places, the number of escalators has also increased rapidly. Escalators have brought great convenience to people's travel, but accidents caused by escalators have occurred from time to time, causing panic among people.

[0003] According to the requirements of my country's inspection regulations and standards, the gap between the escalator steps and the apron plate should meet the requirements that the horizontal gap on any side should not be greater than 4mm, and the total gap at the symmetrical positions on both sides should not be greater than 7mm.

[0004] At present, domestic units responsible for the inspection, manufacturing, maintenance, installation, modification, and repair of escalators mainly use oblique feeler gauges or sheet feeler gauges to measure the gap between the steps and the apron plate, and there is no special measuring instrument. When using oblique feeler gauges and sheet feeler gauges for measurement, due to the anti-pinch device on the apron plate, the measuring space is small, the oblique feeler gauge reading is difficult, and the reading error is large. In addition, since the escalator needs to measure the gap between the apron plate and the volume at multiple locations, manual reading is required when using sheet feeler gauges for measurement, which is labor-intensive and inefficient. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above prior art and provide an escalator step and apron plate gap measuring instrument with simple and reasonable structure and capable of improving measurement efficiency and accuracy. Another purpose of the present invention is to provide an escalator step and apron plate gap measuring method.

[0006] The objective of the present invention is achieved through the following technical solutions: An instrument for measuring the gap between escalator steps and apron plates, comprising a first strain sensor, a second strain sensor, a signal processing device, a display device and a sheet-shaped ruler body; the cross section of the ruler body is a right-angled triangle, a cantilever beam is provided on the hypotenuse of the ruler body, one end of the cantilever beam is connected to the ruler body, and the other end of the cantilever beam corresponds to the minimum angle of the ruler body, and there is a gap between the beam body of the cantilever beam and the ruler body, the first strain sensor is installed at one end of the cantilever beam, a fixed beam is provided on the right-angled short side of the ruler body, both ends of the fixed beam are connected to the ruler body, and there is a gap between the beam body of the fixed beam and the ruler body, the second strain sensor is installed at one end of the fixed beam, the signal processing device and the display device are both installed on the ruler body, and the first strain sensor, the second strain sensor and the display device are all connected to the signal processing device.

[0007] Furthermore, the hypotenuse of the ruler body is provided with a first groove connected to the minimum angle of the ruler body, one end of the cantilever beam is connected to the side wall of the first groove away from the minimum angle of the ruler body, the other end of the cantilever beam corresponds to the minimum angle of the ruler body, there is a gap between the beam body of the cantilever beam and the bottom of the first groove, and the outer side of the cantilever beam and the hypotenuse of the ruler body are located on the same straight line.

[0008] Furthermore, the cantilever beam includes a transition section and a compression section, one end of the transition section is fixedly connected to the ruler body, one end of the compression section is fixedly connected to the other end of the transition section, the other end of the compression section is a pointed end corresponding to the minimum angle of the ruler body, the first strain sensor is installed on the transition section, and there is a gap between the transition section and the compression section and the ruler body, and the outer side of the compression section is on the same straight line as the hypotenuse of the ruler body.

[0009] Furthermore, the length and height of the transition section are both smaller than those of the pressure section.

[0010] Furthermore, a second groove is formed on the right-angled short side of the ruler body, the fixed beam is arranged at the open end of the second groove, and there is a gap between the beam body of the fixed beam and the groove bottom of the second groove.

[0011] Furthermore, a force-bearing platform is provided in the middle of the fixed beam, and the force-bearing platform protrudes from the surface of the fixed beam.

[0012] Furthermore, the signal processing device is packaged inside the ruler body.

[0013] Furthermore, the display device is installed on the right-angled triangle surface of the ruler.

[0014] Furthermore, the ruler body is made of metal.

[0015] A method for measuring the gap between an escalator step and an apron plate, using an escalator step and apron plate gap measuring instrument, inserting a ruler into the gap between the escalator step and the apron plate, wherein the right-angled long side of the ruler is tightly attached to the apron plate, the outer side of the cantilever beam is pressed against the edge of the step, and a gradually increasing force is applied in the middle vertical direction of the fixed beam, and a signal processing device receives signals from a first strain sensor and a second strain sensor; when the strain value of the first strain sensor remains unchanged, the signal processing device records the corresponding strain values ​​of the first strain sensor and the second strain sensor, calculates the gap value, and finally displays the gap value on a display device.

[0016] Furthermore, a method for measuring the gap between an escalator step and an apron plate comprises the following steps:

[0017] S1. Turn on the measuring instrument and insert the ruler into the gap between the step and the apron plate;

[0018] S2. Click the measurement button of the measuring instrument, and the signal processing device starts to collect strain signals of the second strain sensor and the first strain sensor;

[0019] S3. Apply a gradually increasing force in the vertical direction to the middle of the fixed beam. The cantilever beam and the fixed beam begin to deform. When the cantilever beam is close to the ruler, the strain value of the first strain sensor no longer changes. The signal processing device records the strain values ​​of the first strain sensor and the second strain sensor at this time. The formula Calculate the gap measurement value and display the measurement result on a display device;

[0020] S4. Pick up the measuring instrument, read and record the value displayed by the instrument, and complete the measurement of a single position.

[0021] The present invention has the following advantages over the prior art:

[0022] 1. This measuring instrument is small in size and easy to carry. The ruler is designed to be a right-angled triangle sheet, and a fixed beam is set on the right-angled short side of the ruler, and a cantilever beam is set on the hypotenuse of the ruler. With two strain sensors, a display device and a signal processing device, the measurement results can be directly displayed numerically, eliminating the errors caused by manual observation, improving the measurement accuracy and efficiency, filling the market gap, improving the safety level of escalators, ensuring the personal safety of passengers, enhancing people's sense of security when riding escalators, and satisfying people's yearning for a better life.

[0023] 2. This method for measuring the gap between the escalator step and the apron plate uses a measuring instrument in the shape of a right-angled triangle sheet, which is easy to operate and can directly display the measurement results, effectively improving the measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It shows a schematic structural diagram of an escalator step and apron plate gap measuring instrument according to the present invention;

[0026] Figure 2 A force principle diagram of an escalator step and apron plate gap measuring instrument according to the present invention is shown;

[0027] Figure 3 The working principle diagram of the escalator step and apron plate gap measuring instrument according to the present invention is shown;

[0028] In the figure, 1 is the first strain sensor; 2 is the second strain sensor; 3 is the signal processing device; 4 is the display device; 5 is the ruler; 501 is the short right-angle side; 502 is the long right-angle side; 503 is the hypotenuse; 504 is the minimum angle; 6 is the second groove; 7 is the fixed beam; 8 is the first groove; 9 is the cantilever beam; 10 is the force-bearing platform; 11 is the transition section; 12 is the pressure section; 13 is the pointed end;

[0029] E is the elastic modulus of the ruler material, which is a constant; ε 1 is the strain value of the first strain sensor; ε 2 is the strain value of the second strain sensor; b 1 h is the width of the cantilever beam at the installation position of the first strain sensor; 1 is the height of the cantilever beam at the installation position of the first strain sensor; b 2 h is the width of the fixed beam where the second strain sensor is installed; 2 is the height of the fixed beam at the installation location of the second strain sensor; t is the distance from the center of the fixed beam to both ends; θ is the minimum angle of the ruler; L is the length of the cantilever beam; d is the distance from the action point of the step on the cantilever beam to the fixed end of the cantilever beam; Δ is the gap value between the step and the apron plate. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figure 1 The escalator step and apron plate gap measuring instrument shown comprises a first strain sensor 1, a second strain sensor 2, a signal processing device 3, a display device 4 and a sheet-shaped ruler 5; the cross section of the ruler 5 is a right triangle, the hypotenuse 503 of the ruler 5 is provided with a cantilever beam 9, one end of the cantilever beam 9 is connected to the ruler 5, the other end of the cantilever beam 9 corresponds to the minimum angle 504 of the ruler 5, there is a gap between the beam body of the cantilever beam 9 and the ruler 5, the first strain sensor 1 is installed at one end of the cantilever beam 9, the right-angled short side 501 of the ruler 5 is provided with a fixed beam 7, both ends of the fixed beam 7 are connected to the ruler 5, there is a gap between the beam body of the fixed beam 7 and the ruler 5, the second strain sensor 2 is installed at one end of the fixed beam 7, the signal processing device 3 and the display device 4 are both installed on the ruler 5, the first strain sensor 1, the second strain sensor 2 and the display device 4 are all connected to the signal processing device 3. The gap measuring instrument can directly display the gap value by arranging a fixed beam 7 and a cantilever beam 9 on a right-angled triangle sheet-shaped ruler body 5 in conjunction with two strain sensors, thereby eliminating the inconvenience of manual reading and effectively improving the reading accuracy and measurement efficiency.

[0032] The hypotenuse 503 of the ruler body 5 is provided with a first groove 8 connected to the minimum angle 504 of the ruler body 5. One end of the cantilever beam 9 is connected to the side wall of the first groove 8 away from the minimum angle 504 of the ruler body 5. The other end of the cantilever beam 9 corresponds to the minimum angle 504 of the ruler body 5. There is a gap between the beam body of the cantilever beam 9 and the bottom of the first groove 8, so that the cantilever beam 9 is squeezed and deformed. In order to ensure the accuracy of the measurement, the outer side of the cantilever beam 9 and the outer side of the hypotenuse 503 of the ruler body 5 are located on the same straight line. The other end of the cantilever beam 9 is a pointed end 13, and the angle of the pointed end 13 is the same as the minimum angle 504 of the ruler body 5. In actual use, under the premise of ensuring the accuracy of the measurement result, the pointed end 13 can also be other angles. The gap between the cantilever beam 9 and the bottom of the first groove 8 (i.e., the ruler body) is very small, generally about 1 mm, and its value will vary slightly depending on the material and size of the ruler body 5.

[0033] The cantilever beam 9 includes a transition section 11 and a pressure section 12, one end of the transition section 11 is fixedly connected to the side wall of the first groove 8 away from the minimum angle 504 of the ruler body 5, one end of the pressure section 12 is fixedly connected to the other end of the transition section 11, and the other end of the pressure section 12 is a pointed end 13 corresponding to the minimum angle 504 of the ruler body 5. The first strain sensor 1 is installed on the transition section 11, and there is a gap between the transition section 11 and the pressure section 12 and the bottom of the first groove 8, and the outer side of the pressure section 12 is located on the same straight line as the hypotenuse 503 of the ruler body 5.

[0034] The length and height of the transition section 11 are both smaller than the pressure section 12. This arrangement facilitates the installation of the first strain sensor 1.

[0035] The right-angled short side 501 of the ruler body 5 is provided with a second groove 6, and the fixed beam 7 is arranged at the open end of the second groove 6 (i.e., the top of the groove), and there is a gap between the fixed beam 7 and the bottom of the second groove 6. By setting the gap, the fixed beam 7 is deformed after being subjected to force, and the second strain sensor 2 can collect the deformation value of the fixed beam 7 and transmit the value to the signal processing device, thereby completing the calculation of the gap value between the step and the apron plate.

[0036] The fixed beam 7 has a force-bearing platform 10 in the middle, and the force-bearing platform 10 protrudes from the surface of the fixed beam 7. By setting the force-bearing platform 10, it is convenient to apply a gradually increasing force to the vertical direction of the fixed beam 7, which effectively improves the measurement efficiency and accuracy. The two ends of the fixed beam 7 are respectively fixedly connected to the two side walls of the second groove 6, so that the fixed beam 7 and the second groove 6 form a closed space. The second strain sensor 2 is installed at one end of the fixed beam 7 and is close to the ruler body 5. This setting can improve the accuracy of the strain value collected by the second strain sensor 2 and improve the measurement accuracy of the instrument.

[0037] The signal processing device 3 is packaged inside the ruler body 5. The signal processing device can be a common IC chip, which receives the signals of the two strain sensors and transmits the signal processing results to the display device 4. The ruler body 5 is also provided with switches, buttons, etc. connected to the signal processing device. The instrument is powered by batteries.

[0038] The display device 4 is installed on the right triangle surface of the ruler body 5. The display device 4 can be a common display screen, and the gap value can be directly displayed by setting the display device 4, which is convenient for reading, reduces reading errors, reduces labor intensity, and improves measurement efficiency.

[0039] The ruler body 5 is made of metal. On the premise of ensuring the practical life of the ruler body, other materials can also be selected.

[0040] In this embodiment: the ruler body 5 is a right-angled triangular sheet, the short right-angle side 501 of the ruler body is 25 mm long, the long right-angle side 502 is 56 mm long, the ruler body 5 is 7 mm thick, the minimum angle of the ruler body is θ, and the ruler body 5 presents a long pointed structure as a whole. The ruler body is made of metal, and a signal processing device is encapsulated inside.

[0041] In this embodiment, the length L of the cantilever beam is 35 mm, and the width b of the cantilever beam at the installation position of the first strain sensor is 1 is 7 mm (the width of the transition section and the compression section in this embodiment is 7 mm), and the height h of the cantilever beam at the installation position of the first strain sensor is 1 The height of the transition section is 1mm, the height of the compression section is 2.5mm, and the distance between the cantilever beam and the ruler body when it is not compressed is 1mm; the distance t from the center to the two ends of the fixed beam is 8mm, and the width of the fixed beam at the installation of the second strain sensor is b 2 The height of the fixed beam at the second strain sensor installation location is h 2 1mm;

[0042] The first strain sensor 1 is installed at the fixed end of the cantilever beam 9, and the second strain sensor 2 is installed at one end of the fixed beam 7; the two strain sensors and the display device 4 are respectively connected to the signal processing device 3. When a vertical force is applied in the middle of the fixed beam 7, the cantilever beam 9 and the fixed beam 7 are deformed respectively, and the two strain sensors respectively collect the strain values ​​of the two beams and transmit them to the signal processing device 3, and the signal processing device 3 displays the calculated gap value on the display device 4.

[0043] The size of this instrument is smaller than the common oblique feeler gauge. It does not require manual reading. You only need to insert the instrument into the test position, press it, and take it out to read the reading. Therefore, it is very little affected by the anti-pinch device. Compared with the oblique feeler gauge and the sheet feeler gauge, this instrument can greatly reduce labor intensity and improve measurement accuracy.

[0044] like Figure 2 and Figure 3 As shown, a method for measuring the gap between escalator steps and apron plates is provided, wherein an instrument for measuring the gap between escalator steps and apron plates is used, a ruler 5 is inserted into the gap between escalator steps and apron plates, wherein the right-angled long side 502 of the ruler 5 is pressed against the apron plates, the outer side of the cantilever beam 9 is pressed against the edge of the step, a gradually increasing force is applied to the middle vertical direction of the fixed beam 7, and a signal processing device 3 receives signals from the first strain sensor 1 and the second strain sensor 2; when the strain value of the first strain sensor 1 remains unchanged, the signal processing device 3 records the corresponding strain values ​​of the first strain sensor 1 and the second strain sensor 2, calculates the gap value, and finally displays the gap value on the display device 4. Applying a gradually increasing force to the middle of the fixed beam 7 can be achieved by pressing with a finger.

[0045] A method for measuring the gap between an escalator step and an apron plate comprises the following steps:

[0046] S1. Turn on the measuring instrument and insert the ruler 5 into the gap between the step and the apron plate;

[0047] S2, click the measurement button of the measuring instrument, and the signal processing device 3 starts to collect strain signals of the second strain sensor 2 and the first strain sensor 1;

[0048] S3. Apply a gradually increasing force in the vertical direction to the middle of the fixed beam 7. The cantilever beam 9 and the fixed beam 7 begin to deform. When the cantilever beam 9 is close to the ruler body 5, the strain value of the first strain sensor 1 no longer changes. The signal processing device 3 records the strain values ​​of the first strain sensor 1 and the second strain sensor 2 at this time. The formula The gap measurement value is calculated and the measurement result is displayed on the display device; where ε 1 is the strain value of the first strain sensor 1, ε 2 is the strain value of the second strain sensor 2, b 1 is the width of the cantilever beam 9 at the installation position of the first strain sensor 1, h 1 is the height of the cantilever beam 9 at the installation position of the first strain sensor 1, b 2 h is the width of the fixed beam 7 where the second strain sensor 2 is installed, 2 is the height of the fixed beam 7 where the second strain sensor 2 is installed, t is the distance from the center of the fixed beam 9 to both ends, θ is the minimum angle 504 of the ruler 5, and L is the length of the cantilever beam 9. 1 、h 1 、b 2 、h 2 , t, θ, and L are obtained through calibration of other standard instruments, input into the signal processing device as fixed values, and are set at the factory.

[0049] S4. Pick up the measuring instrument, read and record the value displayed on the instrument, complete the measurement of a single position, and then measure the gap values ​​of other positions in turn.

[0050] The principle of this measurement method is: Figure 2 As shown, a vertical force F is applied in the middle of the fixed beam. 2 , a force F perpendicular to the cantilever beam will be generated between the cantilever beam 9 and the step 1 , the first strain sensor will produce a strain value ε 1 , the second strain sensor will produce a strain value ε 2 The final gap measurement value Δ is calculated by the signal processing device according to the formula, and the result is displayed on the display device 4.

[0051] refer to Figure 2 , we can get:

[0052] According to the force balance:

[0053] According to the mechanical analysis of the fixed beam: Where E is the elastic modulus of the ruler material;

[0054] According to the mechanical analysis of the cantilever beam:

[0055] According to geometric analysis: Δ=(Ld)sinθ;

[0056] Combining the above formulas, we can get

[0057] The above specific implementation modes are preferred embodiments of the present invention and cannot be used to limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A method for measuring the gap between escalator steps and apron plates. Features: The measuring method adopts an escalator step and apron plate gap measuring instrument, which includes a first strain sensor, a second strain sensor, a signal processing device, a display device and a sheet-shaped ruler body; the cross section of the ruler body is a right triangle, the hypotenuse of the ruler body is provided with a cantilever beam, one end of the cantilever beam is connected to the ruler body, the other end of the cantilever beam corresponds to the minimum angle of the ruler body, there is a gap between the beam body of the cantilever beam and the ruler body, the first strain sensor is installed at one end of the cantilever beam, the right-angled short side of the ruler body is provided with a fixed beam, both ends of the fixed beam are connected to the ruler body, there is a gap between the beam body of the fixed beam and the ruler body, the second strain sensor is installed at one end of the fixed beam, the signal processing device and the display device are both installed on the ruler body, and the first strain sensor, the second strain sensor and the display device are all connected to the signal processing device.

2. The method for measuring the gap between escalator steps and apron plates according to claim 1, Features: The hypotenuse of the ruler body is provided with a first groove connected to the minimum angle of the ruler body, one end of the cantilever beam is connected to the side wall of the first groove away from the minimum angle of the ruler body, the other end of the cantilever beam corresponds to the minimum angle of the ruler body, there is a gap between the beam body of the cantilever beam and the bottom of the first groove, and the outer side of the cantilever beam and the hypotenuse of the ruler body are located on the same straight line.

3. The method for measuring the gap between escalator steps and apron plates according to claim 1, Features: The cantilever beam includes a transition section and a compression section, one end of the transition section is fixedly connected to the ruler body, one end of the compression section is fixedly connected to the other end of the transition section, the other end of the compression section is a pointed end corresponding to the minimum angle of the ruler body, the first strain sensor is installed on the transition section, and there is a gap between the transition section and the compression section and the ruler body, and the outer side of the compression section and the hypotenuse of the ruler body are located on the same straight line.

4. The method for measuring the gap between the escalator step and the apron plate according to claim 3, Features: The length and height of the transition section are both smaller than the pressure section.

5. The method for measuring the gap between escalator steps and apron plates according to claim 1, Features: A second groove is formed on the right-angled short side of the ruler body, the fixed beam is arranged at the open end of the second groove, and there is a gap between the beam body of the fixed beam and the groove bottom of the second groove.

6. The method for measuring the gap between escalator steps and apron plates according to claim 1 or 5, Features: The middle part of the fixed beam is provided with a force-bearing platform, and the force-bearing platform protrudes from the surface of the fixed beam.

7. The method for measuring the gap between escalator steps and apron plates according to claim 1, Features: The signal processing device is packaged inside the ruler body, and the display device is installed on the right-angled triangle surface of the ruler body.

8. The method for measuring the gap between escalator steps and apron plates according to claim 1, Features: The ruler body is made of metal.

9. The method for measuring the gap between the escalator step and the apron plate according to any one of claims 1 to 8, Features: The ruler body is inserted into the gap between the escalator step and the apron plate, wherein the right-angled long side of the ruler body is close to the apron plate, and the outer side of the cantilever beam is pressed against the edge of the step, and a gradually increasing force is applied to the middle vertical direction of the fixed beam, and the signal processing device receives the signals of the first strain sensor and the second strain sensor; when the strain value of the first strain sensor remains unchanged, the signal processing device records the strain values ​​corresponding to the signals of the first strain sensor and the second strain sensor, calculates the gap value, and finally displays the gap value on the display device.

10. A method for measuring the gap between escalator steps and apron plates according to claim 9, Features: The steps include: S1. Turn on the measuring instrument and insert the ruler into the gap between the step and the apron plate; S2, click the measurement button of the measuring instrument, and the signal processing device starts to collect strain signals of the first strain sensor and the second strain sensor; S3. Apply a gradually increasing force in the vertical direction to the middle of the fixed beam. The cantilever beam and the fixed beam begin to deform. When the cantilever beam is close to the ruler, the strain value of the first strain sensor no longer changes. The signal processing device records the strain values ​​of the first strain sensor and the second strain sensor at this time. The formula The gap measurement value is calculated and the measurement result is displayed on the display device, where ε 1 is the strain value of the first strain sensor, ε 2 is the strain value of the second strain sensor, b 1 is the width of the cantilever beam at the installation position of the first strain sensor, h 1 is the height of the cantilever beam at the installation position of the first strain sensor, b 2 h is the width of the fixed beam at the second strain sensor installation location, 2 is the height of the fixed beam where the second strain sensor is installed, t is the distance from the center of the fixed beam to both ends, θ is the minimum angle of the ruler, and L is the length of the cantilever beam; S4. Pick up the measuring instrument, read and record the value displayed by the instrument, and complete the measurement of a single position.

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