CN112938728A - Detection method for brake fault of escalator - Google Patents
Detection method for brake fault of escalator Download PDFInfo
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- CN112938728A CN112938728A CN202110249734.3A CN202110249734A CN112938728A CN 112938728 A CN112938728 A CN 112938728A CN 202110249734 A CN202110249734 A CN 202110249734A CN 112938728 A CN112938728 A CN 112938728A
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000003745 diagnosis Methods 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 17
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- 230000000007 visual effect Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
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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
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Abstract
A detection method for the brake fault of the escalator, wherein after making the escalator reach the normal running speed, measure the real-time running power of the escalator; comparing the measured real-time operating power to a nominal operating power; when the real-time running power is smaller than the product of the nominal running power and a threshold factor, the real-time running power of the escalator is continuously measured, and a control unit of the escalator cannot send out a brake fault alarm; the escalator control unit issues a brake failure alarm when the real-time operating power is greater than or equal to the product of the nominal operating power and a threshold factor.
Description
Technical Field
The present disclosure relates to a method of detecting a brake failure for an escalator.
Background
Escalators use mechanical brakes with two brake arms to contact the motor drum to stop the escalator. The brake clearance between the brake arm and the motor drum is only 1.5 mm and is therefore difficult to adjust. If the gap is not properly adjusted, unexpected friction between the brake arm and the motor drum can occur, which is a brake failure mode (i.e., a brake failure) that can reduce the service life of the brake. In addition, sudden stops may also occur during escalator operation. This failure mode is common in both the factory and the field, and therefore this problem needs to be improved.
In the prior art, a staircase contracting brake temperature detecting device is provided, which comprises a patch type temperature sensor, a fault diagnosis module and an output module, wherein the patch type temperature sensor is fixed on the surface of the staircase contracting brake, the patch type temperature sensor is used for sensing the temperature of the staircase contracting brake, and the fault diagnosis module is connected with the patch type temperature sensor and is used for collecting and processing a temperature signal transmitted by the patch type temperature sensor; the output module is connected with the fault diagnosis module, the escalator control system and the information management center and used for transmitting the warning signal output by the fault diagnosis module to the escalator control system and the escalator information management center. The detection device can predict that the band-type brake is likely to break down and remind maintenance personnel to carry out maintenance and adjustment, so that the service life of the escalator is prolonged, and the safety of the elevator is improved.
However, since the temperature sensor is easily affected by environmental factors, and the measurement accuracy thereof is not high and unstable, the possibility that the detection personnel easily overlook the real detection increases, resulting in unnecessary judgment of the malfunction of the foundation brake, and further the detection personnel may lose trust and interest in the measurement setting.
Disclosure of Invention
The solution of the present disclosure provides a method of detecting faults by power measurement and comparison. By the method, the escalator system can give an alarm to remind a main brake of a fault, so that a factory operator or a maintenance worker can receive a message to adjust the gap. By adopting the scheme, the service life of the brake can be prolonged, and the abnormal parking times can be reduced.
In order to solve one or more of the drawbacks of the prior art, a method for detecting a brake failure of an escalator is proposed according to an aspect of the present disclosure.
And after the escalator reaches the normal running speed, measuring the real-time running power of the escalator.
Comparing the measured real-time operating power with a nominal operating power.
When the real-time operating power is less than the product of the nominal operating power and the threshold factor, the real-time operating power of the escalator is continuously measured, and the control unit of the escalator does not send out a brake failure alarm.
The escalator control unit issues a brake failure alarm when the real-time operating power is greater than or equal to the product of the nominal operating power and a threshold factor.
According to the above aspect of the present disclosure, the operation time of the escalator is measured after the escalator is started.
And when the measured running time is less than one second, continuously measuring the real-time running power of the escalator.
When the measured operating time is greater than or equal to one second, a one-second average power value is calculated based on the obtained real-time operating power.
According to the above aspects of the present disclosure, when the one-second average power value is smaller than a preset minimum operating power, the one-second average power value continues to be calculated based on the obtained real-time operating power.
According to the above aspects of the present disclosure, when the one-second average power value is greater than or equal to a preset minimum operating power, a first average power value having a first time period is calculated based on the obtained real-time operating power.
Based on the real-time operating power obtained, a second average power value is calculated having a second time period.
The first time period is shorter than the second time period.
According to the above aspects of the present disclosure, when the second average power value is less than or equal to the product of the first average power value and the threshold factor, the control unit of the escalator does not issue a brake failure alarm by continuing to calculate the first average power value having the first time period and the second average power value having the second time period based on the obtained real-time operation power.
According to the above aspects of the present disclosure, the control unit of the escalator issues a brake failure alarm when the second average power value is greater than the product of the first average power value and the threshold factor.
According to the above aspects of the present disclosure, the first time period is set to 5 seconds.
The second time period is set to 20 seconds.
According to the above aspects of the present disclosure, the threshold factor is set to be in a range of 1 to 1.07.
According to the above aspects of the present disclosure, the brake failure alarm is set to an audible alarm or a visual alarm.
According to the above aspects of the disclosure, the detection method is used for detecting the band-type brake fault of the escalator.
According to the above aspects of the present disclosure, a power measuring unit, a fault diagnosing unit, a fault outputting unit, and a control unit are provided in the escalator.
The measurement of the real-time operating power for the escalator is carried out by the power measuring unit.
Connecting the fault diagnosis unit to the power measurement unit, wherein the fault diagnosis unit is used for collecting and processing the real-time running power measured by the power measurement unit.
And when the fault diagnosis unit judges that the second average power value is larger than the product of the first average power value and the threshold factor, the fault diagnosis unit outputs a warning signal.
And the fault output unit is connected with the fault diagnosis unit and the control unit and is used for transmitting the warning signal output by the fault diagnosis unit to the control unit.
Issuing, by the control unit, the brake failure alert.
According to the above aspects of the present disclosure, a human body sensor is provided at an entrance of the escalator.
The detection method is performed when the human body sensor detects that no passenger enters on the escalator.
The solution of the present disclosure provides a method for detecting a fault through power measurement (i.e., moving average of power) and comparison, which does not result in unnecessary judgment of a malfunction of a foundation brake since a defect that a temperature sensor is easily affected by environmental factors to cause poor and unstable measurement accuracy is avoided.
In addition, taking power averages over a period of time may avoid abnormal fluctuations in instantaneous readings because the detection logic based on these abnormal fluctuations is unreliable, so the present disclosure uses a moving average over a longer time span (such as, but not limited to, 5 seconds or 20 seconds) as a signal to analyze the detection of a foundation brake failure.
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 shows a normal operating power diagram of an escalator in the absence of a brake failure (i.e. a band-type brake failure);
fig. 2 shows an abnormal operating power diagram of an escalator in the event of a brake failure (i.e. a band-type brake failure);
fig. 3 shows a superimposed curve of the 1 second average power value, the 5 second average power value and the 20 second average power value of the detection method according to the present disclosure;
FIG. 4 shows a flow chart of a detection method according to the present disclosure;
fig. 5 shows a power measuring unit, a fault diagnosis unit, a fault output unit and a control unit provided in the escalator 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.
Fig. 1 shows a normal operating power diagram of an escalator in the absence of a brake failure (i.e. a band-type brake failure), including graphs corresponding to, for example, the upward travel, downward travel and stopping of the escalator. In the normal test cycle as shown in fig. 1, the power level tends to decrease smoothly after the initial acceleration to the rated rotational speed.
Fig. 2 shows an abnormal operating power diagram of the escalator in the event of a brake failure (i.e. a band-type brake failure), including graphs corresponding to, for example, the upward travel, the downward travel and the stopping of the escalator. As shown in fig. 2, when the foundation brake fails, the power level increases almost exponentially when the failure begins.
According to one embodiment of the present disclosure, as shown in fig. 3 to 5, a method of detecting a brake failure for an escalator 1 is proposed.
After the escalator 1 is brought to a normal operating speed, the real-time operating power of the escalator 1 is measured.
Comparing the measured real-time operating power with a nominal operating power.
When the real-time operating power is less than the product of the nominal operating power and the threshold factor, the real-time operating power of the escalator is continuously measured, and the control unit of the escalator does not send out a brake failure alarm.
The escalator control unit issues a brake failure alarm when the real-time operating power is greater than or equal to the product of the nominal operating power and a threshold factor.
According to one embodiment of the present disclosure, the set of detection methods is performed only when the empty elevator is running, for example, a human body sensor such as a radar at the entrance of the escalator is used to determine whether a passenger enters the escalator (of course, a camera device can be used to determine the passenger), and the detection methods are generally monitored and run when the number of passengers is small in the morning or evening.
The present embodiment provides a method for detecting a fault through power measurement (i.e., moving average of power) and comparison, which does not cause unnecessary fault judgment of the service brake because the defect that the temperature sensor is easily affected by environmental factors, thereby causing poor and unstable measurement accuracy, is avoided.
According to the above-described embodiment of the present disclosure, as shown in fig. 4, the operation time of the escalator 1 is measured after the escalator 1 is started.
And when the measured running time is less than one second, continuously measuring the real-time running power of the escalator.
When the measured operating time is greater than or equal to one second, a one-second average power value (expressed in power _1s _ avg) is calculated based on the obtained real-time operating power.
According to the above embodiments of the present disclosure, when the one-second average power value is smaller than the preset minimum operating power, the one-second average power value is continuously calculated based on the obtained real-time operating power.
According to the above-described respective embodiments of the present disclosure, when the one-second average power value is greater than or equal to the preset minimum operating power, a first average power value having a first time period, for example, a 5-second average power value having a 5-second time period (expressed as power _5s _ avg), is calculated based on the obtained real-time operating power.
Based on the real-time operating power obtained, a second average power value having a second time period, for example a 20 second average power value having a 20 second time period (denoted power _20s _ avg), is calculated.
The first time period is shorter than the second time period.
According to the above embodiments of the present disclosure, when the second average power value is less than or equal to the product of the first average power value and the threshold factor, the first average power value having the first time period and the second average power value having the second time period continue to be calculated based on the obtained real-time operation power, and the control unit of the escalator does not issue a brake failure alarm.
According to the above-mentioned embodiments of the present disclosure, the control unit of the escalator issues a brake failure alarm (brake failure) when the second average power value is greater than the product of the first average power value and the threshold factor.
According to the above-described various embodiments of the present disclosure, for example, the first time period may be set to 5 seconds, but is not limited to this value, for example.
For example, the second time period may be set to 20 seconds, but is not limited to this value, for example.
According to the above-described various embodiments of the present disclosure, the threshold factor may be set to be in the range of 1 to 1.07, but is not limited to this range, for example.
According to the above various embodiments of the present disclosure, the brake failure alarm is set to an audible alarm or a visual alarm.
According to the above embodiments of the present disclosure, the detection method is used for detecting a band-type brake fault of an escalator.
According to the above-described respective embodiments of the present disclosure, a power measuring unit 2, a fault diagnosing unit 3, a fault outputting unit 4, and a control unit 5 are provided in the escalator 1.
The measurement of the real-time operating power of the escalator 1 is carried out by the power measuring unit 2.
The fault diagnosis unit 3 is connected to the power measurement unit 2, and the fault diagnosis unit 3 is used for collecting and processing the real-time running power measured by the power measurement unit 2.
After the escalator 1 is started, the running time of the escalator 1 is measured.
When the measured operation time is less than one second, the power measuring unit 2 continues to measure the real-time operation power of the escalator.
When the measured operating time is greater than or equal to one second, the fault diagnosis unit 3 calculates a one-second average power value (expressed in power _1s _ avg) based on the obtained real-time operating power.
When the one-second average power value is smaller than a preset minimum operating power, the fault diagnosis unit 3 continues to calculate a one-second average power value based on the obtained real-time operating power.
When the one-second average power value is greater than or equal to a preset minimum operating power, the failure diagnosis unit 3 calculates a first average power value having a first time period, for example, a 5-second average power value having a 5-second time period (expressed as power _5s _ avg), based on the obtained real-time operating power.
The fault diagnosis unit 3 calculates a second average power value having a second time period, for example, a 20-second average power value having a 20-second time period (expressed as power _20s _ avg), based on the obtained real-time operating power.
When the failure diagnosing unit 3 determines that the second average power value is less than or equal to the product of the first average power value and the threshold factor (for example, the threshold factor is 1.07), the failure diagnosing unit 3 continues to calculate a first average power value having a first time period and a second average power value having a second time period based on the obtained real-time operating power.
When the failure diagnosis unit 3 determines that the second average power value is greater than the product of the first average power value and the threshold factor (for example, the threshold factor is 1.07), an alarm signal is output by the failure diagnosis unit 3.
The fault output unit 4 is connected with the fault diagnosis unit 3 and the control unit 5, and is used for transmitting the warning signal output by the fault diagnosis unit 3 to the control unit 5.
The brake failure alarm is issued by the control unit 5.
The present embodiment may avoid abnormal fluctuations in instantaneous readings using power averages over a period of time because the detection logic based on these abnormal fluctuations is unreliable, so the present disclosure uses a moving average over a longer time span (such as, but not limited to, 5 seconds or 20 seconds) as a signal to analyze the detection of a foundation brake fault.
While the disclosure has been described in the specification and drawings with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosure as defined in the claims. Moreover, the combination and arrangement of features, elements and/or functions between specific embodiments herein is clearly apparent and thus, in light of this disclosure, one skilled in the art will appreciate that features, elements and/or functions of an embodiment may be incorporated into another specific embodiment as appropriate, unless described otherwise, above. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the essential scope thereof. Therefore, it is intended that the disclosure not be limited to the particular embodiment illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out this disclosure, but that the disclosure will include all embodiments falling within the scope of the foregoing description and the appended claims.
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 (11)
1. A method for detecting a brake failure of an escalator, wherein
Measuring the real-time running power of the escalator after the escalator reaches the normal running speed;
comparing the measured real-time operating power to a nominal operating power;
when the real-time running power is smaller than the product of the nominal running power and a threshold factor, the real-time running power of the escalator is continuously measured, and a control unit of the escalator cannot send out a brake fault alarm;
the escalator control unit issues a brake failure alarm when the real-time operating power is greater than or equal to the product of the nominal operating power and a threshold factor.
2. The detection method according to claim 1, wherein
Measuring the running time of the escalator after the escalator is started;
when the measured running time is less than one second, continuously measuring the real-time running power of the escalator;
when the measured operating time is greater than or equal to one second, a one-second average power value is calculated based on the obtained real-time operating power.
3. The detection method according to claim 2, wherein
When the one-second average power value is smaller than a preset minimum running power, continuing to calculate the one-second average power value based on the obtained real-time running power.
4. The detection method according to claim 3, wherein
When the one-second average power value is greater than or equal to a preset minimum running power:
calculating a first average power value with a first time period based on the obtained real-time operating power;
calculating a second average power value having a second time period based on the obtained real-time operating power;
the first time period is shorter than the second time period.
5. The detection method according to claim 4, wherein
When the second average power value is less than or equal to the product of the first average power value and the threshold factor, continuing to calculate a first average power value having a first time period and a second average power value having a second time period based on the obtained real-time operating power, the escalator control unit does not issue a brake failure alarm.
6. The detection method according to claim 5, wherein
When the second average power value is greater than the product of the first average power value and the threshold factor, a control unit of the escalator issues a brake failure alarm.
7. The detection method according to claim 6, wherein
Setting the first time period to 5 seconds;
the second time period is set to 20 seconds.
8. The detection method according to claim 5 or 6, wherein
Setting the threshold factor to be in the range of 1 to 1.07.
9. The detection method according to claim 1, wherein
Setting the brake failure alarm to an audible alarm or a visual alarm.
10. The detection method according to claim 8, wherein
A power measuring unit, a fault diagnosis unit, a fault output unit and a control unit are arranged in the escalator;
performing, by the power measurement unit, a measurement for real-time operating power of the escalator;
connecting the fault diagnosis unit to the power measurement unit, wherein the fault diagnosis unit is used for collecting and processing the real-time running power measured by the power measurement unit;
when the fault diagnosis unit judges that the second average power value is larger than the product of the first average power value and the threshold factor, the fault diagnosis unit outputs a warning signal;
the fault output unit is connected with the fault diagnosis unit and the control unit and is used for transmitting the warning signal output by the fault diagnosis unit to the control unit;
issuing, by the control unit, the brake failure alert.
11. The detection method according to claim 1, wherein
A human body sensor is arranged at an entrance of the escalator;
the detection method is performed when the human body sensor detects that no passenger enters on the escalator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110249734.3A CN112938728A (en) | 2021-03-08 | 2021-03-08 | Detection method for brake fault of escalator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110249734.3A CN112938728A (en) | 2021-03-08 | 2021-03-08 | Detection method for brake fault of escalator |
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| JP2016098048A (en) * | 2014-11-18 | 2016-05-30 | 東芝エレベータ株式会社 | Passenger conveyor |
| CN107817122A (en) * | 2017-09-28 | 2018-03-20 | 广州特种机电设备检测研究院 | A kind of escalator braking distance no-load method of testing and device |
| CN108163690A (en) * | 2017-12-29 | 2018-06-15 | 通力电梯有限公司 | Equipment, escalator and the method that escalator is monitored online is monitored online |
| CN111853100A (en) * | 2020-07-31 | 2020-10-30 | 日立电梯（广州）自动扶梯有限公司 | Escalator brake system and control method |
| CN112340586A (en) * | 2020-10-17 | 2021-02-09 | 武汉信达天成物联网技术有限公司 | Escalator brake monitoring method and system for on-line monitoring |
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2021
- 2021-03-08 CN CN202110249734.3A patent/CN112938728A/en active Pending
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| JP2016098048A (en) * | 2014-11-18 | 2016-05-30 | 東芝エレベータ株式会社 | Passenger conveyor |
| CN107817122A (en) * | 2017-09-28 | 2018-03-20 | 广州特种机电设备检测研究院 | A kind of escalator braking distance no-load method of testing and device |
| CN108163690A (en) * | 2017-12-29 | 2018-06-15 | 通力电梯有限公司 | Equipment, escalator and the method that escalator is monitored online is monitored online |
| CN111853100A (en) * | 2020-07-31 | 2020-10-30 | 日立电梯（广州）自动扶梯有限公司 | Escalator brake system and control method |
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