CN112723125A - Synchronous detection device for step chain wheel of escalator and escalator - Google Patents

Synchronous detection device for step chain wheel of escalator and escalator Download PDF

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Publication number
CN112723125A
CN112723125A CN202110000965.0A CN202110000965A CN112723125A CN 112723125 A CN112723125 A CN 112723125A CN 202110000965 A CN202110000965 A CN 202110000965A CN 112723125 A CN112723125 A CN 112723125A
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CN
China
Prior art keywords
speed sensor
step sprocket
sprocket
signal
rotation speed
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CN202110000965.0A
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Chinese (zh)
Inventor
高翔
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Kone Elevators Co Ltd
Kone Corp
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Kone Elevators Co Ltd
Kone Corp
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Priority to CN202110000965.0A priority Critical patent/CN112723125A/en
Publication of CN112723125A publication Critical patent/CN112723125A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B29/00—Safety devices of escalators or moving walkways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • G01M13/021—Gearings

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Escalators And Moving Walkways (AREA)

Abstract

A synchronous detection device for a step chain wheel of an escalator, wherein a first step chain wheel and a second step chain wheel are respectively arranged at two ends of a main shaft, and the synchronous detection device comprises a first rotating speed sensor, a second rotating speed sensor and a controller; the first speed sensor is configured to detect a rotational speed of the first step sprocket and generate a corresponding first speed signal; the second rotational speed sensor is configured to detect a rotational speed of the second step sprocket and generate a corresponding second rotational speed signal; the controller calculates a phase difference between the first step sprocket and the second step sprocket based on the received first rotational speed signal and the second rotational speed signal. An escalator comprising a synchronous detection device as described above.

Description

Synchronous detection device for step chain wheel of escalator and escalator
Technical Field
The present disclosure relates to a synchronous detection device for a step sprocket of an escalator, and also to an escalator.
Background
The step chain wheels are synchronously rotated when the escalator is in operation. It is important to maintain synchronous rotation of the step sprockets or elevator components can be damaged. Many elevator companies have developed spindle speed monitoring devices. But in most cases it is mounted on only one side of the sprocket. In addition, there is a failure mode in which the main shaft is broken due to poor welding, accumulation of mechanical damage, or uncertain stress factors of the step sprocket in the escalator. For such severe failure modes, there is currently no mature monitoring and detection method.
Disclosure of Invention
To solve one or more of the drawbacks of the prior art, according to one aspect of the present disclosure, a synchronous detecting device for a step sprocket of an escalator is provided, in which a first step sprocket and a second step sprocket are respectively installed at both ends of a main shaft.
The synchronous detection device comprises a first rotating speed sensor, a second rotating speed sensor and a controller.
The first speed sensor is configured to detect a rotational speed of the first step sprocket and generate a corresponding first speed signal.
The second rotational speed sensor is configured to detect a rotational speed of the second step sprocket and generate a corresponding second rotational speed signal.
The controller calculates a phase difference between the first step sprocket and the second step sprocket based on the received first rotational speed signal and the second rotational speed signal.
According to the above aspect of the present disclosure, the first rotation speed sensor is installed at a side of the first step sprocket.
The second rotation speed sensor is mounted on a side surface of the second step sprocket.
According to the above aspects of the present disclosure, the first and second rotational speed sensors are inductive sensors or magnetic inductive sensors that detect rotational speeds of the first and second step sprockets, respectively, in a non-contact and wear-free manner. This non-contact and wear-free manner provides safety and stability of the detection, avoiding damage to the sensors and sprockets.
According to the above-described various aspects of the present disclosure, the first rotation speed sensor and the second rotation speed sensor are connected in parallel.
The first rotating speed signal and the second rotating speed signal are direct current pulse signals with the frequency range of 0.7 to 6Hz and 24V. This provides a fast, high precision and high resolution detection signal.
According to the above aspects of the present disclosure, the controller issues a fault signal representative of the first step sprocket and the second step sprocket being out of synchronization and issues a stop signal when the phase difference exceeds a predetermined first phase difference threshold.
When the phase difference exceeds a predetermined second phase difference threshold, the controller issues a fault signal representing a breakage of the spindle and issues a stop signal.
According to the above aspects of the present disclosure, when the controller calculates that the rotational speeds of the first step sprocket and the second step sprocket exceed a predetermined rotational speed threshold based on the first rotational speed signal and the second rotational speed signal, the controller issues a failure signal representing that the rotational speeds of the first step sprocket and the second step sprocket are abnormal and issues a stop signal.
According to the above aspects of the present disclosure, the first rotational speed sensor and the second rotational speed sensor are both mounted between the first step sprocket and the second step sprocket.
According to the above aspects of the present disclosure, the first and second rotation speed sensors are installed at outer sides of the first and second step sprockets, respectively.
According to the above aspects of the present disclosure, the first rotational speed sensor and the second rotational speed sensor are integrated and mounted between the first step sprocket and the second step sprocket.
According to another aspect of the present disclosure, an escalator is provided, which includes the synchronous detection device as described above.
In the solution according to the present disclosure, the rotation speed sensors are mounted on both sides of the step sprocket or the rotation speed sensors can detect the rotation speeds of both step sprockets, respectively. The advantage is to detect the synchronicity of the step sprockets at both ends of the main shaft, which will also effectively detect a main shaft breakage. At the same time, it is also a speed monitoring solution, which is more robust than the volt detection side.
In the solution according to the present disclosure, rotational speed signals from the first step sprocket and the second step sprocket are recorded and calculated. When the main shaft is normally operated, the signals from the first step sprocket and the second step sprocket have a constant phase difference (relative displacement).
The controller issues a fault signal representative of the first step sprocket and the second step sprocket being out of synchronization and issues a stop signal when the phase difference exceeds a predetermined first phase difference threshold.
When the main shaft is broken, the phase difference of the two end sprockets exceeds a preset second phase difference threshold value. At this time, the controller sends a stop signal to prevent the passenger from being injured.
The rotational speeds of the first step sprocket and the second step sprocket may be measured separately. The speed measurement can also be compared to a predetermined rotational speed threshold to determine if the escalator is over-speeding or under-speeding. If overspeed and underspeed occur, the controller will send a stop signal to avoid injury to the passenger.
So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.
As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.
Drawings
The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.
Fig. 1 illustrates an escalator according to the present disclosure including a synchronous detection device according to the present disclosure;
FIG. 2 shows a schematic diagram of a synchronization detection apparatus according to the present disclosure;
FIG. 3 shows a phase difference between the first step sprocket and the second step sprocket according to the present disclosure.
Detailed Description
Specific embodiments according to the present disclosure are described in detail below with reference to the accompanying drawings.
According to an embodiment of the present disclosure, a synchronous detecting device for a step sprocket of an escalator is proposed as shown in fig. 1 and 2, in which a first step sprocket 1 and a second step sprocket 2 are respectively installed at both ends of a main shaft 3.
The synchronous detection device comprises a first rotating speed sensor 1-1, a second rotating speed sensor 2-1 and a controller 4.
The first speed sensor 1-1 is arranged to detect a rotational speed of the first step sprocket 1 and to generate a corresponding first speed signal.
The second speed sensor 2-1 is arranged to detect a speed of rotation of the second step sprocket 2 and to generate a corresponding second speed signal.
The controller 4 calculates a phase difference between the first step sprocket 1 and the second step sprocket 2 based on the received first rotational speed signal and the second rotational speed signal.
According to the above-described embodiment of the present disclosure, the first rotation speed sensor 1-1 is installed at the side of the first step sprocket 1.
The second rotation speed sensor 2-1 is installed at a side of the second step sprocket 2.
According to the above-described respective embodiments of the present disclosure, the first and second rotation speed sensors 1-1 and 2-1 are inductive sensors or magnetic sensors that detect the rotation speeds of the first and second step sprockets 1 and 2, respectively, in a non-contact and wear-free manner. This non-contact and wear-free manner provides safety and stability of the detection, avoiding damage to the sensors and sprockets.
According to the above respective embodiments of the present disclosure, the first rotation speed sensor 1-1 and the second rotation speed sensor 2-1 are connected in parallel.
The first rotating speed signal and the second rotating speed signal are direct current pulse signals with the frequency range of 0.7 to 6Hz and 24V. This provides a fast, high precision and high resolution detection signal.
According to the above-described embodiments of the present disclosure, the controller 4 issues a fault signal representing that the first step sprocket 1 and the second step sprocket 2 are out of synchronization and issues a stop signal when the phase difference exceeds a predetermined first phase difference threshold.
When the phase difference exceeds a predetermined second phase difference threshold, the controller 4 issues a fault signal representing a breakage of the spindle and issues a stop signal.
The second phase difference threshold is greater than the first phase difference threshold.
According to the above-described respective embodiments of the present disclosure, when the controller 4 calculates that the rotation speeds of the first step sprocket 1 and the second step sprocket 2 exceed the predetermined rotation speed threshold based on the first rotation speed signal and the second rotation speed signal, the controller 4 issues a failure signal representing that the rotation speeds of the first step sprocket 1 and the second step sprocket 2 are abnormal and issues a stop signal.
The step sprocket is strictly symmetrical (with a small tolerance range, about 0.1, negligible) during the manufacturing process. As shown in fig. 3, two inductive sensors are utilized to generate a rectangular pulse of 24 VDC. The general frequency range corresponds to the rated speed or the energy-saving speed of the escalator, and the frequency range is from 0.7Hz to 6 Hz.
Assuming that the a/B pulses (corresponding to the first speed sensor 1-1 and the second speed sensor 2-1, respectively) are fixed by the tooling fixture (e.g., mounted on the truss of the escalator), the a/B pulses are strictly identical. Even if the A/B pulse has initial installation error, the software in the controller can self-learn and store the initial deviation on the aspect of data processing, and make correct change trend judgment by combining the operation direction. When the absolute value of the change of the phase difference exceeds the set threshold value of the software, the controller triggers alarm output.
If the step sprocket has 16 teeth, the angle between the teeth is 360 °/16 — 22.5 ° ± 0.1 ° (tolerance 0.1 °).
Under normal conditions, the A/B pulses are either out of phase or slightly out of phase.
The judgment for the abnormality is as follows:
and delta T/T is 360 degrees (the calculation of the phase difference is not influenced by the change of the pulse frequency of the escalator at different running speeds by delta T/T), and T is the period of the pulse.
For example, software sets the phase difference to vary by more than 10 °, i.e., the pulses a/B are relatively displaced from their initial installed state, i.e., in waveform, the pulses Δ T/T x 360 ° > 10 ° are generated by a single tooth, while physically the dual side step sprockets are not synchronized/relatively displaced by > 0.6 °, 22.5 ° x10 °/360 ° -0.6 °).
As shown in fig. 3, if the phase difference exceeds the limit set in the software, it is an exception:
the pulse a leads or lags by more than 10 ° (corresponding to an included angle between teeth of 22.5 ° x10 °/360 ° -0.6 °), and at 6Hz, Δ t-4.6 ms triggers a fault output.
The pulse a leads or lags by B > 10 ° (corresponding to an angle between teeth of 22.5 ° x10 °/360 ° -0.6 °), and at 0.7Hz, Δ t-39.7 ms triggers a fault output.
According to the above-described respective embodiments of the present disclosure, the first rotation speed sensor 1-1 and the second rotation speed sensor 2-1 are each installed between the first step sprocket 1 and the second step sprocket 2 (not shown).
According to the above-described respective embodiments of the present disclosure, as shown in fig. 2, the first rotation speed sensor 1-1 and the second rotation speed sensor 2-1 are installed at the outer sides of the first step sprocket 1 and the second step sprocket 2, respectively.
According to the above-described respective embodiments of the present disclosure, the first rotation speed sensor 1-1 and the second rotation speed sensor 2-1 are integrated and mounted between the first step sprocket 1 and the second step sprocket 2 (not shown).
According to another embodiment of the present disclosure, an escalator is proposed as shown in fig. 1, which includes the synchronous detection device as described above.
The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the embodiments.
Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of the various embodiments. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of various embodiments includes each dependent claim in combination with every other claim in the claim set.
No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Further, as used herein, the article "the" is intended to include the incorporation of one or more items referenced by the article "the" and may be used interchangeably with "one or more". Further, as used herein, the term "set" is intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more". Where only one item is intended, the phrase "only one item" or similar language is used. In addition, as used herein, the term "having," variants thereof, and the like are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise. In addition, as used herein, the term "or" when used in series is intended to be inclusive and may be used interchangeably with "and/or" unless specifically stated otherwise (e.g., if used in conjunction with "or" only one of ").

Claims (10)

1. A synchronous detection device for a step chain wheel of an escalator, wherein a first step chain wheel and a second step chain wheel are respectively arranged at two ends of a main shaft,
the synchronous detection device comprises a first rotating speed sensor, a second rotating speed sensor and a controller;
the first speed sensor is configured to detect a rotational speed of the first step sprocket and generate a corresponding first speed signal;
the second rotational speed sensor is configured to detect a rotational speed of the second step sprocket and generate a corresponding second rotational speed signal;
the controller calculates a phase difference between the first step sprocket and the second step sprocket based on the received first rotational speed signal and the second rotational speed signal.
2. The synchronization detection apparatus according to claim 1,
the first rotation speed sensor is mounted on a side surface of the first step sprocket;
the second rotation speed sensor is mounted on a side surface of the second step sprocket.
3. The synchronization detection apparatus according to claim 1 or 2,
the first and second rotational speed sensors are inductive or magneto-inductive sensors that detect rotational speeds of the first and second step sprockets, respectively, in a non-contact and wear-free manner.
4. The synchronization detection apparatus according to claim 3,
the first rotation speed sensor and the second rotation speed sensor are connected in parallel;
the first rotating speed signal and the second rotating speed signal are direct current pulse signals with the frequency range of 0.7 to 6Hz and 24V.
5. The synchronization detection apparatus according to claim 4,
when the phase difference exceeds a predetermined first phase difference threshold, the controller issues a fault signal representative of the first step sprocket and the second step sprocket being out of synchronization and issues a stop signal;
when the phase difference exceeds a predetermined second phase difference threshold, the controller issues a fault signal representing a breakage of the spindle and issues a stop signal.
6. The synchronization detection apparatus according to claim 4,
when the controller calculates that the rotation speeds of the first step sprocket and the second step sprocket exceed a predetermined rotation speed threshold based on the first rotation speed signal and the second rotation speed signal, the controller sends out a fault signal representing that the rotation speeds of the first step sprocket and the second step sprocket are abnormal and sends out a stop signal.
7. The synchronization detection apparatus according to claim 2,
the first rotation speed sensor and the second rotation speed sensor are both mounted between the first step chain wheel and the second step chain wheel.
8. The synchronization detection apparatus according to claim 2,
the first and second rotation speed sensors are respectively installed at outer sides of the first and second step sprockets.
9. The synchronization detection apparatus according to claim 1,
the first and second speed sensors are integrated and mounted between the first and second step sprockets.
10. Escalator, characterized in that it comprises a synchronous detection device according to one of the preceding claims 1 to 9.
CN202110000965.0A 2021-01-05 2021-01-05 Synchronous detection device for step chain wheel of escalator and escalator Pending CN112723125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110000965.0A CN112723125A (en) 2021-01-05 2021-01-05 Synchronous detection device for step chain wheel of escalator and escalator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110000965.0A CN112723125A (en) 2021-01-05 2021-01-05 Synchronous detection device for step chain wheel of escalator and escalator

Publications (1)

Publication Number Publication Date
CN112723125A true CN112723125A (en) 2021-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110000965.0A Pending CN112723125A (en) 2021-01-05 2021-01-05 Synchronous detection device for step chain wheel of escalator and escalator

Country Status (1)

Country Link
CN (1) CN112723125A (en)

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