CN107817122B - Escalator stopping distance no-load test method and device - Google Patents
Escalator stopping distance no-load test method and device Download PDFInfo
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Abstract
The invention discloses a method and a device for testing the stopping distance of an escalator without load, comprising the following steps: testing the stopping distance of the escalator under the no-load condition, and recording the stopping distance as S0(ii) a According to the test of the real-time braking distance, the average braking deceleration a in no-load is calculated0(ii) a According to stopping distance S0Average brake deceleration a at idle0Load m loaded by escalatornAnd correction coefficient k when the escalator is loaded by n times and fully loadednObtaining the braking distance of the escalator under any load; and drawing the braking distance calculation results under different loads into a curve. The method and the device provided by the invention can predict the braking distance of the escalator under any load through the test of the no-load braking distance and the braking deceleration and the calculation of a mathematical model, realize the braking distance of the no-load test escalator, solve the problem of test risk brought by weight carrying, reduce the test cost and improve the test efficiency.
Description
Technical Field
The invention relates to the technical field of escalator braking performance, in particular to a method and a device for testing the braking distance of an escalator without load.
Background
The escalator is an indispensable vehicle for realizing large-flow passenger transportation in public places such as stations, shopping malls, subways and the like, has an extremely wide application range in recent years, and the reserve of the escalator in China also rises rapidly. However, at the same time, escalator safety accidents also show a rising trend. Especially, after the 12-month Shenzhen escalator runs backwards in 2010, the 7-month Beijing subway reverse running accident in 2011 and the 7-month lake Beijing escalator winding accident in 2015, the safety problem of the escalator gets important attention in the whole society. Especially, the braking performance of the escalator and whether the escalator can be braked in time directly influence the severity of the accident. However, in the current industry, the braking performance evaluation methods are few and non-uniform, and in addition, the standard specification specially aiming at the escalator safety evaluation is lacked, the escalator safety evaluation is still in a non-basis state, and the development of escalator safety evaluation work is also limited. Currently, in the field of escalator operation safety research, the european union is in the world leading position. The thought of safety assessment is introduced into the aspects of manufacturing, installation and the like of escalators earlier in the european union, for example, the manufacturing and installation requirements and the safety requirements of all aspects of elevators are fully fused in EN115-1-2008 "safety standards for manufacturing and installation of escalators and moving walkways", so that the thought of safety is embodied to the maximum extent; the european union has drafted EN115-2-2010 "escalator and moving walk safety requirements" in 2010: part 2 improves the safety of existing escalators that are being lifted automatically, and for elevators with longer service lives, the risk associated with escalator defects can be evaluated using this criterion. The research of the domestic escalator safety technology is still in the stage of tracking European Union and ISO standard. The basic safety standard GB 16899 of the escalator equivalently adopts the EN115-1 standard in Europe, provides nationwide unified technical basis and safety requirements for manufacturing, mounting and inspection of the escalator, and is the most important part of the relevant technical rules of the existing escalator safety in China. In the aspect of escalator safety evaluation, GB24403.1 and GB20900 are respectively converted from ISO/TS22559-1 part 1 of safety requirement of an elevator, which is a global basic safety requirement, and ISO/TS 14798 methods for risk evaluation and reduction of the elevator, the escalator and a moving sidewalk, and are two important reference standards in the field of escalator safety evaluation in China.
The invention provides a method for testing the braking distance without load, which avoids hidden dangers caused by weight transportation, reduces economic expenditure and has wide application prospect.
In addition to a full load test, there is a light load test method mentioned in a patent (zl201410014460.x) in the current method for detecting the full load stopping distance of the escalator: the method measures the no-load braking distance and the braking distance under the light load through two running tests under the no-load and light load states, namely the braking distance of the escalator or the moving sidewalk under the rated load or less can be obtained through a mathematical model; the disadvantage is that the load is still required and the test is required twice.
In the prior art, a full-load braking distance test is carried out by loading a rated load on an escalator, the rated load is uniformly distributed on the escalator and is fully distributed with 2/3 steps at most, the load is arranged on the upper part of the escalator, the escalator is started to run after the completion, an emergency stop switch is pressed down after the escalator runs to the rated speed, the braking distance of the escalator is recorded, and inspectors are required to master the time point when the emergency stop is pressed down so as to avoid accidents, so that the requirements are high and certain risks exist.
The prior art has the following disadvantages: the full-load braking distance test needs weights, which brings great inconvenience and danger; the test precision is low, and the braking process cannot be accurately captured. According to the method, the braking distance under any load can be obtained through the test of the no-load braking distance and the braking deceleration and the calculation of a mathematical model, no weight is needed, and the test method is safe and convenient.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an automatic escalator braking distance no-load testing method and device, the method and device can obtain the braking distance under any load through the test of the no-load braking distance and the braking deceleration and the calculation of a mathematical model, no weight is needed, and the testing method is safe and convenient.
The purpose of the invention is realized by the following technical scheme:
an escalator stopping distance no-load test method comprises the following steps: testing the stopping distance of the escalator under the no-load condition, and recording the stopping distance as S0；
According to the test of the real-time braking distance, the average braking deceleration a in no-load is calculated0；
According to stopping distance S0Average brake deceleration a at idle0Load m loaded by escalatornAnd correction coefficient k when the escalator is loaded by n times and fully loadednObtaining the braking distance of the escalator under any load;
and drawing the braking distance calculation results under different loads into a curve.
An escalator stopping distance no-load testing device, comprising: the system comprises a touch screen, a transmission module, a high-speed laser ranging module, a braking distance calculation module, a deceleration calculation module and a curve drawing module;
the touch screen is used for inputting the speed, angle, width, no-load braking distance and no-load braking deceleration data of the escalator, and displaying braking distance prediction results, braking distance curves and detection results under different loads;
the high-speed laser ranging module is used for testing the distance between the instrument and the reflector in real time;
the system stopping distance calculating module is used for calculating the running distance of the escalator from the time when the emergency stopping button is pressed to the time when the escalator completely stops;
the deceleration calculating module is used for calculating the average deceleration of the escalator from the time when the scram button is pressed to the time when the escalator completely stops;
and the curve drawing module is used for drawing the braking distance calculation results under different loads into a curve and displaying the curve.
One or more embodiments of the present invention may have the following advantages over the prior art:
the system stopping distance of the escalator under any load can be predicted through the test of the no-load system stopping distance and the system stopping deceleration and the calculation of a mathematical model, the system stopping distance of the escalator under no-load test is realized, the problem of test risk brought by weight carrying is solved, the test cost is reduced, and the test efficiency is improved.
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FIG. 1 is a flow chart of an escalator stopping distance no-load test method;
FIG. 2 is a structural diagram of an escalator stopping distance no-load tester;
fig. 3 is a schematic diagram of an escalator stopping distance no-load test.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
Referring to fig. 1, the method for testing the stopping distance of the escalator without load can realize the stopping distance when any load (including full load) of the escalator is tested without load, firstly, the stopping distance under the no-load condition of the escalator is tested, and the stopping distance is recorded as S0；
According to the test of the real-time braking distance, the average braking deceleration a in no-load is calculated0；
According to stopping distance S0Average brake deceleration a at idle0Load m loaded by escalatornAnd correction coefficient k when the escalator is loaded by n times and fully loadednObtaining the braking distance of the escalator under any load;
and drawing the braking distance calculation results under different loads into a curve.
The braking distance formula under any load of the escalator is as follows:
Sn＝kn·f(S0,a0,mn)
where n is a multiple of full load, SnThe braking distance when the escalator is loaded by n times of full load is m, knIs an escalatorCorrection factor at n times full load, a0The average braking deceleration of the escalator in no-load is in m/s2，mnThe load for escalator loading is in kg.
As shown in fig. 2, the present embodiment further provides an escalator stopping distance no-load testing device, including: the system comprises a touch screen, a transmission module, a high-speed laser ranging module, a braking distance calculation module, a deceleration calculation module and a curve drawing module;
the touch screen is used for inputting the speed, angle, width, no-load braking distance and no-load braking deceleration data of the escalator, and displaying braking distance prediction results, braking distance curves and detection results under different loads;
the high-speed laser ranging module is used for testing the distance between the instrument and the reflector in real time;
the system stopping distance calculating module is used for calculating the running distance of the escalator from the time when the emergency stopping button is pressed to the time when the escalator completely stops;
the deceleration calculating module is used for calculating the average deceleration of the escalator from the time when the scram button is pressed to the time when the escalator completely stops;
and the curve drawing module is used for drawing the braking distance calculation results under different loads into a curve and displaying the curve.
The transmission module can perform wireless data transmission.
As shown in fig. 3, the principle of the no-load test method is that the tester is placed on the steps of the escalator and the reflector is fixed 0.5 m below the escalator. Opening the instrument, sending out infrared light by the high-speed laser ranging module at the moment, returning the light through the reflector, calculating the distance between the tester and the reflector in real time according to the infrared light reflection principle, and when the escalator reaches the rated running speed V0Then, press the emergency stop button, and the tester records the distance S between the reflector and the emergency stop button1And starting a timer to start timing until the escalator completely stops, stopping timing, recording time t, and recording the distance S between the escalator and the reflector by the tester2Then, the no-load braking stopping distance of the escalator can be calculated to be S0And calculating to obtain an average braking deceleration a0. From the formula Sn＝kn·f(S0,a0,mn) The braking distance under any load can be obtained.
The escalator stopping distance no-load test method and device provided by the embodiment can be as follows:
1. the braking distance of the escalator under any load can be predicted without load, so that the cost is reduced, and the potential safety hazard is reduced; testing the stopping distance of the escalator under the no-load condition and recording the distance S0Meanwhile, according to the test of the real-time braking distance, the braking average speed a under the no-load condition is calculated0According to the formula Sn＝kn·f(S0,a0，mn) The braking distance under any load can be obtained.
2. The idle braking stopping distance of the escalator is calculated more accurately
The tester tests the distance between the light source and the reflector in real time, and simultaneously records the distance S between the light source and the reflector at the moment1And starting a timer to start timing until the escalator completely stops, stopping timing, and recording the distance S between the escalator and the reflector by the tester2Then the stopping distance S of the escalator can be calculated at the moment0＝S1-S2(ii) a Average deceleration is a0＝V0/2S0The calculated speed of the elevator is V ═ a0t, if | V-V0|<ε, wherein ε is a constant, S0＝S1-S2Otherwise, S0＝(V+V0)t/4。
3. Through the calculation, the braking distance curve catastrophe point (the boundary point with obvious curve) is combined, and k is adjustednAnd obtaining different curve development trends of the front section and the rear section of the catastrophe point, automatically drawing the curve of the escalator braking distance under different loads, and visually mastering the development trend of the escalator braking distance.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. An escalator stopping distance no-load testing device, characterized in that the device comprises: the system comprises a touch screen, a transmission module, a high-speed laser ranging module, a braking distance calculation module, a deceleration calculation module and a curve drawing module;
the touch screen is used for inputting the speed, angle, width, no-load braking distance and no-load braking deceleration data of the escalator, and displaying braking distance prediction results, braking distance curves and detection results under different loads;
the high-speed laser ranging module is used for testing the distance between the instrument and the reflector in real time;
the system stopping distance calculating module is used for calculating the running distance of the escalator from the time when the emergency stopping button is pressed to the time when the escalator completely stops;
the deceleration calculating module is used for calculating the average deceleration of the escalator from the time when the scram button is pressed to the time when the escalator completely stops;
the curve drawing module is used for drawing and displaying the braking distance calculation results under different loads into a curve; in particular to a braking distance curve catastrophe point, by adjusting knObtaining curves of automatically drawing escalator braking distances under different loads according to different curve development trends of the front section and the rear section of the catastrophe point;
the high-speed laser ranging module tests the distance between the high-speed laser ranging module and the reflector in real time, and the tester records the distance S between the high-speed laser ranging module and the reflector at the moment1And starting a timer to start timing until the escalator completely stops, stopping timing, and recording the distance S between the escalator and the reflector by the tester2Then the stopping distance S of the escalator can be calculated at the moment0＝S1-S2(ii) a Average deceleration is a0＝V0/2S0The calculated speed of the elevator is V ═ a0t, e.g.Fruit | V-V0|<ε, wherein ε is a constant, S0＝S1-S2Otherwise, S0＝(V+V0)t/4；
The test process of the escalator stopping distance no-load test device comprises the following steps:
testing the stopping distance of the escalator under the no-load condition, and recording the stopping distance as S0；
According to the test of the real-time braking distance, the average braking deceleration a in no-load is calculated0；
According to stopping distance S0Average brake deceleration a at idle0Load m loaded by escalatornAnd correction coefficient k when the escalator is loaded by n times and fully loadednObtaining the braking distance of the escalator under any load;
drawing the braking distance calculation results under different loads into a curve; in particular to a braking distance curve catastrophe point, by adjusting knObtaining curves of automatically drawing escalator braking distances under different loads according to different curve development trends of the front section and the rear section of the catastrophe point;
the braking distance formula under any load of the escalator is as follows:
Sn＝kn·f(S0,a0,mn)
where n is a multiple of full load, SnStopping distance, k, for loading an escalator by n times full loadnCorrection factor for loading an escalator by n times full load, a0For average braking deceleration m of escalator in no-loadnA load for loading an escalator.
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| CN110817629B (en) * | 2018-08-09 | 2021-05-04 | 杭州沪宁电梯部件股份有限公司 | Elevator diagnosis system |
| CN108975119A (en) * | 2018-09-18 | 2018-12-11 | 华南理工大学广州学院 | A kind of escalator auto-action method for catching and device |
| KR20220049407A (en) | 2020-10-14 | 2022-04-21 | 삼성전자주식회사 | Display apparatus and control method thereof |
| CN112340586B (en) * | 2020-10-17 | 2023-06-02 | 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 |
| CN112938728A (en) * | 2021-03-08 | 2021-06-11 | 通力电梯有限公司 | Detection method for brake fault of escalator |
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Effective date of registration: 20240603 Address after: 510663 No.9, Keke Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Special Equipment Testing and Research Institute (Guangzhou Special Equipment Accident Investigation Technology Center Guangzhou Elevator Safety Operation Monitoring Center) Country or region after: China Address before: 6th Floor, Liurong Building, No. 65 Liurong Road, Yuexiu District, Guangzhou City, Guangdong Province, 510180 Patentee before: GUANGZHOU ACADEMY OF SPECIAL EQUIPMENT INSPECTION & TESTING Country or region before: China |