Device and method for measuring escalator braking characteristic parameters

Abstract

The present invention discloses a device and method for measuring the braking characteristic parameters of an escalator. The measuring device includes a base, to which an optical distance measuring sensor is connected via a vertical angle adjustment mechanism; an electromagnet is provided at the bottom of the base; and a closed structure for the electromagnet in position is also provided on the base. The optical distance measuring sensor, the closed structure for the electromagnet in position, and the electromagnet are all electrically connected to a controller. The measuring device is fixed to the elevator, and the light generated by the optical distance measuring sensor is reflected by a reflective point to obtain the distance S between the device and the reflective point. When braking, the braking characteristic parameters are calculated by obtaining the corresponding distance and time. The device and method for measuring the braking characteristic parameters of an escalator provided by the present invention are simple to operate, safe, and reliable, and can accurately capture the braking point and automatically obtain the braking characteristic parameters of the escalator.

Description

Technical Field

[0001] The present invention relates to the field of escalator brake measurement, and in particular to an escalator brake characteristic parameter measurement device and method. Background Art

[0002] In my country, the national standards and inspection procedures for escalator brake characteristic parameter testing have requirements for the detection of empty and fully loaded braking distances. Currently, the identification of escalator braking action is done manually, relying on the coordination of hands and eyes, and the error is extremely large.

[0003] In addition to the manual line drawing test, the current method for detecting the braking distance of escalators also includes the test method mentioned in the patent (ZL201410276249.5): a reference point is installed on the step pedal near the station at one end of the escalator, and an array ranging sensor is installed near the station at the other end of the escalator, while the array ranging sensor is facing the reference point; the initial distance between the array ranging sensor and the reference point is collected; the escalator is started so that the escalator moves at a constant speed in the direction of the array ranging sensor. When the escalator reaches the rated speed, the escalator is braked. At the same time, during the entire movement of the escalator, the real-time distance between the array ranging sensor and the reference point is collected; based on the initial distance and real-time distance between the array ranging sensor and the reference point, the distance, time and other parameters of the escalator from the start of braking to the end of braking are calculated.

[0004] The disadvantages of the existing technology are: the manual testing of braking distance has large errors, it is impossible to achieve accurate automated measurement, and it is impossible to accurately capture the braking point; the testing method mentioned in the patent (ZL201410276249.5) is also unable to accurately capture the braking point, which directly affects the measurement accuracy. Summary of the Invention

[0005] The purpose of the present invention is to provide an escalator braking characteristic parameter measurement device and method, which can directly read braking characteristic parameters such as braking distance by measuring the dynamic position of the device in real time in combination with a certain algorithm. The operation is simple, safe and reliable.

[0006] To achieve the above-mentioned objectives, the present invention provides an escalator braking characteristic parameter measuring device, comprising a base, to which an optical ranging sensor is connected via a vertical angle adjustment mechanism; an electromagnet is provided at the bottom of the base; and an in-position electromagnet closing structure is also provided on the base, wherein the optical ranging sensor, the in-position electromagnet closing structure, and the electromagnet are all electrically connected to a controller.

[0007] As a further improvement of the present invention, the vertical angle adjustment mechanism includes a first bracket, and a first rotating motor with a horizontally arranged output shaft is connected between the optical ranging sensor and the first bracket; the first rotating motor is electrically connected to a first angle adjustment switch.

[0008] As a further improvement of the present invention, a horizontal angle adjustment mechanism is further connected between the base and the first bracket; the horizontal angle adjustment mechanism includes a second rotating motor with a vertically arranged output shaft; the second rotating motor is electrically connected to a second angle adjustment switch.

[0009] As a further improvement of the present invention, the controller is electrically connected to an electromagnet starting switch.

[0010] As a further improvement of the present invention, the in-place electromagnet closing structure includes a cross bar and a touch switch, and the touch switch is electrically connected to the controller; one end of the cross bar corresponds to the touch switch, and the other end of the cross bar is connected to a roller located on the front side of the base; the cross bar is provided with a cross guide rail that slides with it, and the cross guide rail is connected to a vertical slider, and the vertical slider is slidably fitted with a vertical guide rail, and the vertical guide rail is installed on the base; a first spring is provided between the cross bar and the cross guide rail; and a buffer structure is connected between the base and the vertical slider.

[0011] As a further improvement of the present invention, the buffer structure includes a damper and a second spring which are sleeved together. The damper is arranged vertically, and its upper and lower ends are respectively connected to the base and the vertical slider.

[0012] To achieve the above-mentioned objectives, the present invention also provides a method for measuring escalator braking characteristic parameters, comprising placing an escalator braking characteristic parameter measuring device on a moving escalator, and setting a reflective point at the end of the escalator's forward direction; directing the light source of an optical ranging sensor toward the reflective point in the forward direction of the escalator and receiving a signal of reflected light; then starting the escalator from a standstill, while continuously measuring the distance S between the device and the reflective point through the optical ranging sensor; when the escalator is operating normally, pressing the emergency stop switch, and the measuring device captures the braking point and records the distance Sa from the braking starting point to the reflective point and the braking starting time Ta at this time; when the escalator stops, the measuring device records the distance Sb from the braking ending point to the reflective point and the braking ending time Tb at this time; the braking distance So = Sa - Sb, and the braking time t = Tb - Ta; thereby, the braking distance change rate So / t and the deceleration V / 2So are calculated.

[0013] As a further improvement of the present invention, when the distance S between the device and the reflective point is continuously measured by an optical ranging sensor, the difference between Sn and Sn-1 is calculated in real time to determine whether the escalator is operating normally.

[0014] As a further improvement of the present invention, when the braking point is captured by the measuring device, when ρ<|Sn-Sn-1|<σ, and ρ<|Sn+1-Sn|<σ and ρ<|Sn+2-Sn+1|<σ, the values ​​of Sn and Ta at this time are recorded, and Sa=Sn is set; where ρ and σ are speed difference thresholds set according to the accuracy of the optical ranging sensor and the escalator speed.

[0015] Beneficial effects

[0016] Compared with the prior art, the advantages of the escalator brake characteristic parameter measurement device and method of the present invention are:

[0017] 1. When capturing the braking point, when ρ < |Sn-Sn-1| < σ, and ρ < |Sn+1-Sn| < σ, and ρ < |Sn+2-Sn+1| < σ, record the values ​​of Sn and Ta at this time, and set Sa = Sn. This process selects four consecutive distance parameters in time, obtaining three distance differences to determine whether the escalator is in the braking state. The position point at the second distance Sn obtained is used as the braking point. Because the sensor itself has a certain accuracy range and the test time interval also varies, if the position point at the first distance Sn-1 is used as the braking point, there may be a large error. Therefore, the second one is more accurate. This device and method can achieve automated measurement. The key lies in accurately capturing the braking point and automatically obtaining the escalator's braking characteristic parameters.

[0018] 2. The base can be attached to the escalator's treads or the elevator car's roof beam using an electromagnet, effectively preventing the base from sliding relative to the elevator and ensuring measurement accuracy. When the base is attached to the escalator's treads and moves laterally with them, if the escalator fails to stop after reaching the end of the escalator, the base could strike the ground at the end. To address this, a closed electromagnet mechanism is provided. When the mechanism's roller touches the ground at the end of the escalator, the crossbar moves backward and contacts a touch switch. The controller receives the signal and shuts off the electromagnet. Even if the base strikes the ground, it can still slide relative to the escalator's treads, preventing damage to the measuring device.

[0019] 3. The buffer structure between the base and the vertical slider ensures that the roller presses down on the escalator step, preventing the roller from missing the ground at the end of the escalator due to being too high from the ground and causing the touch switch to fail to be triggered normally.

[0020] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a diagram showing the internal structure of the escalator brake characteristic parameter measuring device of Example 1;

[0023] Figure 2 This is a structural diagram of the electromagnet in place closing in Example 1;

[0024] Figure 3 This is a state diagram of the escalator brake characteristic parameter measurement device of Example 1;

[0025] Figure 4 This is a state diagram of the escalator brake characteristic parameter measurement device of Example 2. DETAILED DESCRIPTION

[0026] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] Example 1

[0028] The specific embodiments of the present invention are as follows Figures 1 to 3 As shown, a device for measuring escalator braking characteristic parameters includes a base 1, to which an optical ranging sensor 2 is connected via a vertical angle adjustment mechanism. An electromagnet 4 is disposed at the bottom of the base 1. The base 1 also includes a pre-positioned electromagnet closing mechanism 6. The optical ranging sensor 2, pre-positioned electromagnet closing mechanism 6, and electromagnet 4 are all electrically connected to a controller 8. The optical ranging sensor 2 can be an infrared ranging sensor or a laser ranging sensor. The controller 8 is mounted on the base 1. A power supply for the various electrical components is also housed within the base 1.

[0029] The vertical angle adjustment mechanism includes a first bracket 3. A first rotary motor (not shown) with a horizontally arranged output shaft is connected between the optical ranging sensor 2 and the first bracket 3. The first rotary motor is electrically connected to a first angle adjustment switch 31. By operating the first angle adjustment switch 31, the optical ranging sensor 2 can be rotated along a vertical plane, switching between horizontally emitting light and vertically emitting light upward to adapt to the usage scenario. For example, when the optical ranging sensor 2 emits light horizontally, it is suitable for use on a horizontally moving escalator 12; when the optical ranging sensor 2 emits light vertically upward, it is suitable for use in an elevator car 13.

[0030] A horizontal angle adjustment mechanism is also connected between the base 1 and the first bracket 3. This mechanism includes a second rotary motor 5 with a vertically arranged output shaft. The second rotary motor 5 is electrically connected to a second angle adjustment switch 9. By operating the second angle adjustment switch 9, the optical ranging sensor 2 can be rotated horizontally until the light it emits strikes the reflective point 11 and is reflected back along its original path.

[0031] The controller 8 is electrically connected to the electromagnet start switch 10. The second angle adjustment switch 9 and the electromagnet start switch 10 are both arranged on the base 1.

[0032] The in-position electromagnet closing mechanism 6 includes a crossbar 62 and a touch switch 7, which is electrically connected to a controller 8. One end of the crossbar 62 corresponds to the touch switch 7, and the other end of the crossbar 62 is connected to a roller 61 located on the front side of the base 1. A transverse guide rail 64 is provided on the crossbar 62, which slidably engages with it. A vertical slider 65 is connected to the transverse guide rail 64, which slidably engages with the vertical slider 65. The vertical guide rail 66 is mounted on the base 1. A first spring 63 is provided between the crossbar 62 and the crossbar 64. A buffer structure is connected between the base 1 and the vertical slider 65.

[0033] The buffer structure includes a damper 67 and a second spring 68 which are sleeved together. The damper 67 is arranged vertically, and its upper and lower ends are connected to the base 1 and the vertical slider 65 respectively.

[0034] To measure escalator braking characteristic parameters, the device is placed on the escalator step 12. A reflective point 11 is placed on the ground at the end of the escalator step 12's forward direction. The light source of the optical distance sensor 2 is directed horizontally toward the reflective point 11 in the direction of the escalator step 12's forward direction and receives the reflected light signal. The escalator step 12 is then started from a standstill, while the optical distance sensor 2 continuously measures the distance S between the device and the reflective point 11. When the escalator is operating normally, the emergency stop switch is pressed. The measuring device captures the braking point and records the distance Sa from the braking start point to the reflective point 11 and the braking start time Ta. When the escalator stops, the measuring device records the distance Sb from the braking end point to the reflective point 11 and the braking end time Tb. The braking distance So = Sa - Sb, and the braking time t = Tb - Ta. The braking distance change rate So / t is calculated, and the deceleration is V / 2So.

[0035] When the distance S between the device and the reflective point 11 is continuously measured by the optical distance measuring sensor 2, the difference between Sn and Sn-1 is calculated in real time to determine whether the escalator is operating normally.

[0036] When the measuring device captures the braking point, if ρ < |Sn - Sn-1| < σ, ρ < |Sn+1 - Sn| < σ, and ρ < |Sn+2 - Sn+1| < σ, record the values ​​of Sn and Ta at this time, and set Sa = Sn. ρ and σ are speed difference thresholds set based on the accuracy of optical ranging sensor 2 and the escalator speed. Before obtaining the distance parameter Sn-1, the distance S measured by optical ranging sensor 2 is always measured when the escalator is in normal operation.

[0037] Example 2

[0038] like Figure 4As shown, the difference from Example 1 is that the optical ranging sensor 2 emits light vertically upward and is suitable for use in an elevator car 13. The escalator brake characteristic parameter measuring device is used to measure the brake characteristic parameters of an elevator. The bottom of the base 1 of the escalator brake characteristic parameter measuring device is fixed to the top crossbeam of the car 13 via an electromagnet 4.

[0039] The present invention has been described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A device for measuring escalator brake characteristic parameters, characterized in that: The invention comprises a base (1), an optical distance sensor (2) is connected to the base (1) via a vertical angle adjustment mechanism; an electromagnet (4) is provided at the bottom of the base (1); an in-position electromagnet closing structure (6) is also provided on the base (1); the optical distance sensor (2), the in-position electromagnet closing structure (6) and the electromagnet (4) are all electrically connected to a controller (8); the vertical angle adjustment mechanism comprises a first bracket (3); a first rotating motor with a horizontally arranged output shaft is connected between the optical distance sensor (2) and the first bracket (3); the first rotating motor is electrically connected to a first angle adjustment switch (31); a horizontal angle adjustment mechanism is also connected between the base (1) and the first bracket (3); the horizontal angle adjustment mechanism comprises a second rotating motor (5) with a vertically arranged output shaft; the second rotating motor (5) is electrically connected to a first angle adjustment switch (31); The controller (8) is electrically connected to a second angle adjustment switch (9); the controller (8) is electrically connected to an electromagnet start switch (10); the in-position electromagnet closing structure (6) includes a cross bar (62) and a touch switch (7), and the touch switch (7) is electrically connected to the controller (8); one end of the cross bar (62) corresponds to the touch switch (7), and the other end of the cross bar (62) is connected to a roller (61) located on the front side of the base (1); a cross rail (64) is provided on the cross bar (62) and is slidably matched with the cross bar, and the cross rail (64) is connected to a vertical slider (65), and the vertical slider (65) is slidably matched with a vertical guide rail (66), and the vertical guide rail (66) is installed on the base (1); a first spring (63) is provided between the cross bar (62) and the cross rail (64); a buffer structure is connected between the base (1) and the vertical slider (65).

2. The escalator brake characteristic parameter measuring device according to claim 1, characterized in that: The buffer structure comprises a damper (67) and a second spring (68) which are sleeved together. The damper (67) is arranged vertically, and its upper and lower ends are respectively connected to the base (1) and the vertical slider (65).

3. A method for measuring escalator braking characteristic parameters, characterized in that: The escalator braking characteristic parameter measuring device described in claim 1 is placed on a moving escalator, and a reflective point (11) is set at the end of the escalator's forward direction; the light source of the optical distance sensor (2) is made to shine toward the reflective point (11) in the forward direction of the escalator and receive the signal of the reflected light; then the escalator is started from a standstill, and the distance S between the device and the reflective point (11) is continuously measured by the optical distance sensor (2); when the escalator is running normally, the emergency stop switch is pressed, the measuring device captures the braking point and records the distance Sa from the braking starting point to the reflective point (11) and the braking starting time Ta at this time; when the escalator stops, the measuring device records the distance Sb from the braking ending point to the reflective point (11) and the braking ending time Tb at this time; the braking distance So=Sa-Sb, and the braking time t=Tb-Ta; thereby, the braking distance change rate So / t is calculated, and the deceleration is V 2 / 2So, V is the rated operating speed of the escalator.

4. The method for measuring escalator brake characteristic parameters according to claim 3, characterized in that: When the distance S between the device and the reflective point (11) is continuously measured by the optical distance measuring sensor (2), the difference between Sn and Sn-1 is calculated in real time to determine whether the escalator is operating normally.

5. The method for measuring escalator braking characteristic parameters according to claim 3, characterized in that: When the braking point is captured by the measuring device, when ρ<|Sn -Sn-1|<σ, and ρ<|Sn+1 -Sn|<σ and ρ<|Sn+2 -Sn+1|<σ, the values ​​of Sn and Ta at this time are recorded, and Sa=Sn; where ρ and σ are speed difference thresholds set according to the accuracy of the optical ranging sensor (2) and the escalator speed.

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