CN218708480U - Main driving chain extension detection device and escalator main driving chain extension control system - Google Patents
Main driving chain extension detection device and escalator main driving chain extension control system Download PDFInfo
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- CN218708480U CN218708480U CN202222850754.9U CN202222850754U CN218708480U CN 218708480 U CN218708480 U CN 218708480U CN 202222850754 U CN202222850754 U CN 202222850754U CN 218708480 U CN218708480 U CN 218708480U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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Abstract
The utility model discloses a main drive chain extension detection device and staircase main drive chain extension control system, wherein main drive chain extension detection device includes: a cantilever end, which is erected on the main driving chain; one end of the fixed support is connected to a first coordinate point of the cantilever end, and the other end of the fixed support is fixed to a second coordinate point of the angle sensor; the angle sensor is fixed at a first preset position and used for acquiring an angle between a straight line where a connecting line of the first coordinate point and the second coordinate point is located and a horizontal line where the angle sensor is located; and the processor is connected with the angle sensor and used for detecting the extension condition of the main driving chain according to the angle information acquired by the angle sensor. The utility model provides an whether equipment of lengthening of automated inspection main drive chain can detect main drive chain in real time, reduces the cost that artifical detection also improves the security. The utility model discloses but wide application in staircase monitoring field.
Description
Technical Field
The utility model relates to a staircase monitoring field especially relates to a main drive chain extension detection device and staircase main drive chain extension control system.
Background
The escalator is driven by a traction machine to rotate by a main drive, and the transmission modes of the escalator include a chain type, a belt type, a gear type and the like, wherein the chain transmission is the most common mode. The metal chain that the staircase used has good intensity, and metal chain can bring wearing and tearing or warp after long-time operation to lead to the length of chain to lengthen, this can cause potential safety hazards such as jump tooth. In order to know the elongation condition of the chain and timely process the chain when abnormity occurs, manual detection is usually performed regularly, but the manual detection is time-consuming and labor-consuming, the requirement on the technical level of maintenance personnel is high, and real-time monitoring cannot be achieved. In addition, if the main driving chain is abnormal during non-patrol, the main driving chain cannot be processed in time, the damage of a transmission device can be caused, the personal safety of passengers is threatened, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a main drive chain extension detection device and staircase main drive chain extension control system.
The utility model adopts the technical proposal that:
a main drive chain elongation detecting device comprising:
a cantilever end, which is erected on the main driving chain;
one end of the fixed support is connected to a first coordinate point of the cantilever end, and the other end of the fixed support is fixed to a second coordinate point of the angle sensor;
the angle sensor is fixed at a first preset position and used for acquiring an angle between a straight line where a connecting line of the first coordinate point and the second coordinate point is located and a horizontal line where the angle sensor is located;
and the processor is connected with the angle sensor and used for detecting the extension condition of the main driving chain according to the angle information acquired by the angle sensor.
Furthermore, the main driving chain is used for driving the main driving chain wheel to rotate, the main driving chain extension detection device further comprises a main driving sensor, the main driving sensor is connected with the processor, and the main driving sensor is used for collecting the rotating speed of the main driving chain wheel.
Further, the main driving sensor is fixed at a second preset position and used for outputting a pulse signal according to the distance between the main driving sensor and the teeth of the driving chain wheel.
Further, the distance between the main drive sensor and the main drive sprocket is between 3mm and 8 mm.
Furthermore, the number of the main driving sensors is two, and pulse signals output by the two main driving sensors are simultaneously input into the processor.
Further, the angle sensor is fixedly installed on a truss of the escalator.
Further, the fixed support is fixed on the first coordinate point of the cantilever end through a bolt.
Further, the system further comprises a cloud server, and the cloud server is connected with the processor in a wireless communication mode.
The utility model discloses another technical scheme who adopts is:
an escalator main drive chain extension control system comprising: the tractor comprises a main driving chain wheel, a tractor driving wheel, a main driving chain and a main driving chain elongation detection device, wherein the tractor driving wheel drives the main driving chain wheel to rotate through the main driving chain;
wherein, the main driving chain elongation detection device is realized by adopting the main driving chain elongation detection device.
The utility model has the advantages that: the utility model provides an whether equipment of elongated of automated inspection main drive chain can detect main drive chain in real time, reduces the cost that artifical detection also improves the security.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a main drive chain elongation detection device in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an extension control system of a main drive chain of an escalator in an embodiment of the present invention;
fig. 3 is a schematic diagram of the embodiment of the present invention illustrating the information collected by the main driving sensor;
FIG. 4 is a schematic diagram of the output pulse of the main driving sensor in the embodiment of the present invention;
FIG. 5 is a flow chart of the self-learning method for detecting the elongation of the main driving chain in the embodiment of the present invention;
FIG. 6 is a graph showing the relationship between the output voltages of the angle sensors according to the embodiment of the present invention;
fig. 7 is a flowchart of the main driving chain elongation detection in the embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 2, the present embodiment provides an escalator main drive chain elongation control system, which includes: the tractor driving wheel 4 drives the main driving sprocket 3 to rotate through the main driving chain 2, and the main driving chain elongation detection device 1 is installed on the main driving chain 2.
As shown in fig. 1, fig. 1 is a schematic view of a main drive chain elongation detecting apparatus of the present embodiment, and the main drive chain elongation detecting apparatus 1 includes:
a cantilever end 7, which is erected on the main drive chain 2;
one end of the fixed support is connected to a first coordinate point of the cantilever end 7, and the other end of the fixed support is fixed to a second coordinate point of the angle sensor 6;
the angle sensor 6 is fixed at a first preset position and used for acquiring an angle between a straight line where a connecting line of the first coordinate point and the second coordinate point is located and a horizontal line where the angle sensor 6 is located;
and the processor 5 is connected with the angle sensor 6 and is used for detecting the extension condition of the main driving chain 2 according to the angle information acquired by the angle sensor 6.
As an alternative embodiment, the fixing bracket is fixed on the first coordinate point of the cantilever end 7 by a bolt. The relative elevation of the nonstandard bolt center is calculated according to the angle and the recorded distance from the bolt center to the axis of the angle sensor 6, so that the elongation condition of the main driving chain 2 can be obtained, and a worker can know whether the main driving chain 2 is abnormal or not in time according to feedback information and can process the abnormality in time. As an optional mode in practical application, if the trend of abnormal extension exists, an early warning signal is sent out, the escalator cannot automatically stop running, but cannot be restarted without troubleshooting after the escalator is stopped.
Referring to fig. 3, as an alternative embodiment, the main driving chain elongation detecting device further includes a main driving sensor for acquiring the rotation speed of the main driving sprocket 3.
Specifically, the main driving sprocket is driven by the traction machine driving wheel 4 through the main driving chain 2, and the linear speed of the main driving sprocket is basically consistent with the speed of the traction machine driving wheel 4. Two main driving sprocket sensors are arranged beside the teeth of the main driving sprocket 3, the main driving sprocket sensors are fixed on the non-moving part on the escalator truss, the sensing ends of the main driving sprocket teeth are right opposite to the sensors, and the cross section of the sensing ends is close to the cross section of the sensing heads of the sensors. The installation distance between the sensor and the main driving sprocket is 3mm to 8 mm. As shown in fig. 4, when the main drive sprocket 3 rotates, the sensor outputs a pulse every time the sprocket passes the sensor, and a pulse signal is output. Meanwhile, the processing unit can receive the pulse signals of the sensor, and calculate and store the number of pulses.
The operation principle of the main drive chain elongation detection device and system will be explained in detail below with reference to the accompanying drawings.
As shown in fig. 5, when each escalator leaves the factory, the length L of the main driving chain 2, the distance L1 from the center of the non-standard bolt on the cantilever end 7 to the axis of the angle sensor, and the included angle α between the straight line (b) where the two points are located and the horizontal line (a) are measured. The radius of the main driving sprocket 3 is a fixed value R, the main driving sprocket circumference is 2 pi R, the main driving sprocket tooth number is a fixed value N, and the main driving sprocket rotates one turn to output N pulses, so the processing unit records the number of pulses generated when the main driving sprocket 2 runs one turn as N = Ln/2 pi R (specifically, the value of N is an upward integer), and stores the data.
The output signal of the angle sensor 6 ranges from 0 to 10V, and as shown in fig. 6, the output voltage and the angle have a linear relationship. According to the linear relation between the voltage and the angle, an analog-to-digital (A/D) converter in the processing unit can obtain a corresponding angle value alpha, and the vertical distance between the nonstandard bolt center and the axis of the angle sensor is H = L1. Sin alpha. The chain has a certain amount of sagging due to self weight, and under the condition, the elongation condition of the driving chain can be estimated by comparing the height of the cantilever end 7 of the elongation detection device.
As a further optional embodiment, in order to better realize automatic monitoring, the sample model is established at the stage of escalator leaving factory. The method comprises the following concrete steps: the self-learning mode of the main drive extension reference value can be entered by setting a function code on a panel of the processing unit, an operator starts the escalator through a key switch at an entrance of the escalator, after the escalator is started for 5S (realized by a built-in timer), the processing unit starts to record the pulse number N1 generated by the sensors (which sensor generates a signal first and then records the pulse generated by which sensor), when the N1 is smaller than the N, the detection device continuously detects, and when one pulse is added, the processing unit collects data once and records and stores the data. And when the N1 is more than or equal to N, the escalator sends a buzzing signal for 3s and stops running. At this time, the operator needs to start the escalator again, but the starting direction needs to be opposite to the previous starting direction. Otherwise, the escalator cannot be started, and the sequence of the two starting directions is not limited. The processing unit is communicated with the escalator main control board through a CAN communication protocol, and the escalator uplink and downlink starting signals are respectively controlled by two input points. And after the escalator is started for 5s for the second time, the processing unit continuously repeats the steps and records and stores data. And after the second self-learning is finished, the escalator sends out a buzzing signal 3S and stops running, and the operation panel automatically exits from the self-learning mode.
And the processing unit processes the data collected according to self-learning and establishes a sample model. The sample model can further improve the reliability through multiple self-learning. Meanwhile, the collected data can be uploaded to the cloud server terminal through the Internet of things module, and data support is provided for subsequent statistical analysis work.
As shown in fig. 7, the escalator standby time extension detection device starts to work, calculates the vertical distance H between the non-standard bolt center and the axis of the angle sensor and compares the vertical distance H with the lower limit value, if the H value is lower than the lower limit value, it is indicated that the main driving chain is extended abnormally, at this moment, the processing unit sends out an alarm signal of the extension of the main driving chain to the escalator, and the escalator sends out a fault alarm after receiving the alarm signal, so as to prompt maintenance personnel to carry out maintenance work and avoid abnormal starting of the escalator.
If the H value is not out of limit, the escalator can be started normally. After the escalator is started to run, the number N1 of main driving pulses is recorded, when the number N1 is smaller than N, the detection device continuously detects, and when one pulse is added, the processing unit collects data once and records and stores the data. And if the N1 is more than or equal to the N, processing according to the collected data to establish a target model. Both the sample model and the target model are generated from a linear model. On the premise, the similarity between the target model and the sample model is compared through a machine learning algorithm based on a linear model, and the higher the similarity is, the closer the target model and the sample model is.
The target model and the sample model have obvious difference, the difference degree can be calculated by comparing Euclidean distances of the same pulse point H value, data analysis of each target point and the sample point is summarized to obtain model space, and finally the distance is converted into a similarity score, so that the similarity is obtained. When the similarity is lower than the lower limit value, the running state of the main driving chain is shown to deviate from the normal state. At the moment, the processing unit sends out a main driving chain extension early warning signal to the escalator, and the escalator sends out early warning after receiving the early warning signal, so that the main driving chain is about to extend or has already extended. Meanwhile, the early warning information can be uploaded to the server through the Internet of things terminal, so that the staff is reminded of early warning the escalator at the first time, the escalator can be prevented from being suffered in the bud, and abrasion of a chain and a gear is avoided.
And when the similarity is not over-limit, calculating the jumping amplitude W after each running period pulse of the main drive, wherein the jumping amplitude W is obtained by the difference between the maximum value and the minimum value of the running period H of one main drive chain. The jumping amplitude can reflect the tensioning and stretching conditions of the chain, when the jumping amplitude is too large, poor meshing can occur between the chain and the chain wheel, abrasion is generated between transmission, and the problem is more prominent particularly when the chain runs at high height. When the calculated run-out amplitude of the main drive chain elongation device is larger than 10mm, the chain may have been stretched or the chain may have been under-tensioned. At the moment, the processing unit sends out a driving chain extension early warning signal to the escalator, the escalator sends out early warning after receiving the early warning signal, and meanwhile early warning information can be uploaded to the server through the Internet of things terminal, so that problems can be prevented, found and handled in time.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (9)
1. A main drive chain elongation detecting device, comprising:
a cantilever end, which is erected on the main driving chain;
one end of the fixed support is connected to a first coordinate point of the cantilever end, and the other end of the fixed support is fixed to a second coordinate point of the angle sensor;
the angle sensor is fixed at a first preset position and used for acquiring an angle between a straight line where a connecting line of the first coordinate point and the second coordinate point is located and a horizontal line where the angle sensor is located;
and the processor is connected with the angle sensor and used for detecting the extension condition of the main driving chain according to the angle information acquired by the angle sensor.
2. The main drive chain elongation detecting device of claim 1, wherein the main drive chain is configured to drive the main drive sprocket to rotate, the main drive chain elongation detecting device further comprises a main drive sensor, the main drive sensor is connected to the processor, and the main drive sensor is configured to acquire a rotation speed of the main drive sprocket.
3. The primary drive chain elongation sensing device as claimed in claim 2, wherein the primary drive sensor is fixed at a second predetermined position for outputting a pulse signal according to a distance between the primary drive sensor and the teeth of the drive sprocket.
4. A main drive chain elongation sensing means as claimed in claim 3, wherein the distance between the main drive sensor and the teeth of the main drive chain is between 3mm and 8 mm.
5. The main drive chain elongation detecting apparatus according to claim 3, wherein the number of the main drive sensors is two, and pulse signals output by the two main drive sensors are simultaneously input into the processor.
6. The main drive chain elongation sensing device of claim 1, wherein the angle sensor is fixedly mounted on a truss of the escalator.
7. The primary drive chain elongation sensing device of claim 1, wherein the mounting bracket is bolted to the first coordinate point of the cantilevered end.
8. The main drive chain elongation detection device of claim 1, further comprising a cloud server, wherein the cloud server is connected with the processor in a wireless communication manner.
9. An escalator main drive chain extension control system, comprising: the traction machine driving wheel drives the main driving chain wheel to rotate through the main driving chain, and the main driving chain elongation detection device is installed on the main driving chain;
wherein the main drive chain elongation detecting device is implemented by using a main drive chain elongation detecting device according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222850754.9U CN218708480U (en) | 2022-10-27 | 2022-10-27 | Main driving chain extension detection device and escalator main driving chain extension control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222850754.9U CN218708480U (en) | 2022-10-27 | 2022-10-27 | Main driving chain extension detection device and escalator main driving chain extension control system |
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| CN218708480U true CN218708480U (en) | 2023-03-24 |
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