CN114440812A - Chain elongation detection method and detection device - Google Patents
Chain elongation detection method and detection device Download PDFInfo
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention relates to a method and a device for detecting chain elongation, which comprises the following steps: firstly, driving a driving wheel to rotate along a first direction until a transmission section of a first chain between the driving wheel and a first driven wheel is tensioned; then, driving the driving wheel to rotate along the reverse direction of the first direction; finally, when the first driven wheel is detected to start rotating along the direction opposite to the first direction, the arc length of the driving wheel in the direction opposite to the first direction is detected, and then the first elongation L1 of the first chain is obtained. This application turns into the rotation arc length that the action wheel corresponds through the elongation with the chain, and then measures through the rotation arc length of the action wheel of conveniently detecting to according to the elongation that obtains the chain, improved the accuracy of the detection of chain elongation, and reduced the detection degree of difficulty of chain elongation.
Description
Technical Field
The invention relates to the field of detection, in particular to a method and a device for detecting chain elongation.
Background
In recent years, escalators and moving walkways have been widely used in places such as subways and shopping malls. However, due to the long-term use of the escalator and the moving sidewalk, the chain in the escalator and the moving sidewalk is easily worn or deformed, and further the length of the chain is increased, so that potential safety hazards such as tooth jumping are generated. In order to know the increased length of the chain and process the chain in time, the conventional detection method is to measure the chain by manually using a measuring tool such as a vernier caliper. Therefore, the traditional detection method has the problems of time and labor waste in the detection process and large detection result error.
Disclosure of Invention
Therefore, it is necessary to provide a method and a device for detecting chain elongation for solving the problems of time and labor consumption in the detection process and large detection result error in the conventional detection method.
The technical scheme is as follows:
in one aspect, a method for detecting chain elongation is provided, which comprises the following steps:
driving the driving wheel to rotate along a first direction until a transmission section of a first chain between the driving wheel and the first driven wheel is tensioned;
driving the driving wheel to rotate along the reverse direction of the first direction;
when the first driven wheel is detected to start rotating along the direction opposite to the first direction, the rotating arc length of the driving wheel along the direction opposite to the first direction is detected, and then the first elongation L1 of the first chain is obtained.
The technical solution is further explained below:
in one embodiment, the step of detecting an arc length of rotation of the driving wheel in the direction opposite to the first direction when the first driven wheel is detected to start rotating in the direction opposite to the first direction, so as to obtain the first elongation L1 of the first chain comprises:
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the rotation angle of the driving wheel along the reverse direction of the first direction is detected, the rotation arc length of the driving wheel is calculated according to the rotation angle of the driving wheel along the reverse direction of the first direction and the radius of the driving wheel, and then the first elongation L1 of the first chain is obtained.
In one embodiment, when it is detected that the first driven wheel starts to rotate in the opposite direction of the first direction, the step of detecting a rotation angle of the driving wheel in the opposite direction of the first direction, and calculating a rotation arc length of the driving wheel according to the rotation angle of the driving wheel in the opposite direction of the first direction and the radius of the driving wheel to obtain the first elongation L1 of the first chain includes:
when the driving wheel is driven to rotate along the reverse direction of the first direction, the pulses of the first detection element are detected and counted;
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the pulse number of the first detection element is recorded, the rotation angle of the driving wheel along the reverse direction of the first direction is calculated according to the recorded pulse number and the pulse number generated by one rotation of the driving wheel, and further the rotation arc length of the driving wheel along the reverse direction of the first direction is calculated according to the rotation angle of the driving wheel along the reverse direction of the first direction and the radius of the driving wheel, so that the first elongation L1 of the first chain is obtained.
In one embodiment, the step of detecting an arc length of the driving wheel in the reverse direction of the first direction when the first driven wheel is detected to start rotating in the reverse direction of the first direction, so as to obtain a first elongation L1 of the first chain comprises:
when the driving wheel is driven to rotate along the reverse direction of the first direction, the linear speed of the driving wheel rotating along the reverse direction of the first direction is detected and timed;
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the detection and timing of the linear speed of the driving wheel are stopped, and then the rotating arc length of the driving wheel can be calculated according to the corresponding relation between the linear speed and the time in the process that the driving wheel rotates along the reverse direction of the first direction, so that the first elongation L1 of the first chain is obtained.
In one embodiment, after the step of detecting an arc length of rotation of the driving pulley in the direction opposite to the first direction when the first driven pulley is detected to start rotating in the direction opposite to the first direction, thereby obtaining a first elongation L1 of the first chain, the method includes:
after the T period, detecting the second elongation L2 of the first chain again, and calculating the elongation rate V of the first chain according to the first elongation L1, the second elongation L2 and the time T, wherein V is (L2-L1)/T;
when the second elongation L2 is greater than or equal to a first preset value, or the elongation rate V of the first chain is greater than a second preset value, sending an abnormal prompt to the first chain;
when the second elongation L2 is greater than or equal to a third preset value, or the elongation rate V of the first chain is greater than a fourth preset value, sending a first chain fault prompt and stopping driving the driving wheel;
in addition, the third preset value is larger than the first preset value, and the fourth preset value is larger than the second preset value.
In one embodiment, another method for detecting chain elongation is provided, which includes the following steps:
the driving wheel is driven to rotate along a first direction until a transmission section of a second chain between the first driven wheel and the second driven wheel is tensioned;
driving the driving wheel to rotate along the reverse direction of the first direction;
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the rotating arc length of the driving wheel along the reverse direction of the first direction is detected, and then a third elongation L3 of the first chain is obtained; when it is detected that the second driven wheel starts to rotate in the direction opposite to the first direction, the arc length of rotation of the first driven wheel in the direction opposite to the first direction is detected, and a fourth elongation L4 of the second chain is obtained.
In one embodiment, when the first driven wheel is detected to start rotating in the direction opposite to the first direction, the arc length of the rotation of the driving wheel in the direction opposite to the first direction is detected, and a third elongation L3 of the first chain is obtained; when it is detected that the second driven wheel starts to rotate in the direction opposite to the first direction, the step of detecting the arc length of rotation of the first driven wheel in the direction opposite to the first direction to obtain a fourth elongation L4 of the second chain includes:
when the driving wheel starts to rotate in the direction opposite to the first direction, pulses of the first detection element and the third detection element are detected and counted respectively, so that the arc length of rotation of the driving wheel in the direction opposite to the first direction can be calculated according to the detected number of pulses of the first detection element, the number of pulses generated when the driving wheel rotates once, and the radius of the driving wheel, and the arc length of rotation of the first driven wheel in the direction opposite to the first direction can be calculated according to the detected number of pulses of the third detection element, the detected number of pulses generated when the first driven wheel rotates once, and the radius of the first driven wheel, so that the third elongation L3 of the first chain and the third elongation L4 of the second chain can be obtained.
In another aspect, there is provided a chain elongation detecting device, including:
the driving wheel can rotate under the action of driving force;
a first driven wheel;
the first chain is sleeved on the outer side walls of the driving wheel and the first driven wheel, so that the driving wheel can drive the first driven wheel to rotate through the first chain;
the first detection element is used for detecting the rotation arc length of the driving wheel;
a second detection element for detecting whether the first driven wheel rotates; and
a controller in communicative connection with both the first detection element and the second detection element.
The technical solution is further explained below:
in one embodiment, the detection element includes a rotary encoder fixedly connected to the driving wheel, a rotation axis of the driving wheel coincides with a rotation axis of the rotary encoder, and the rotary encoder is configured to detect a rotation angle of the driving wheel, so that the controller can calculate a rotation arc length corresponding to the driving wheel according to the rotation angle of the driving wheel and a radius of the driving wheel.
In one embodiment, the detection device further includes a driving member for driving the driving wheel to rotate, a second driven wheel, a second chain, a third detection element for detecting a rotation arc length of the first driven wheel, and a fourth detection element for detecting whether the second driven wheel rotates, the controller is in communication connection with the driving member, the third detection element, and the fourth detection element, and the second chain is sleeved on outer side walls of the first driven wheel and the second driven wheel, so that the first driven wheel can drive the second driven wheel to rotate through the second chain.
The chain elongation detection method and the detection device have the advantages that: (1) the rotation arc length that the extension through with the chain turns into the action wheel and corresponds, and then measures through the rotation arc length of the action wheel of conveniently detecting to according to the extension that obtains the chain (the extension of chain equals the rotation arc length that the action wheel corresponds promptly), improved the accuracy of the detection of chain extension, and reduced the detection degree of difficulty of chain extension. (2) The rotation direction of the driving wheel is controlled, so that the elongation of the chain is converted into the rotation arc length of the driving wheel, efficient detection can be carried out on the elongation of the chain on the premise that the equipment does not need to be disassembled, the equipment work is not influenced, and manual measurement is not needed, the detection efficiency of the elongation of the chain is improved, and the operation is simple and convenient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart of a chain elongation detecting method according to a first embodiment;
FIG. 2 is a flowchart of a chain elongation detecting method according to the second embodiment;
FIG. 3 is a flowchart of a chain elongation detecting method according to a third embodiment;
FIG. 4 is a flowchart of a chain elongation detecting method according to a fourth embodiment;
FIG. 5 is a flowchart of a chain elongation detecting method according to the fifth embodiment;
FIG. 6 is a flowchart of a chain elongation detecting method according to the sixth embodiment;
FIG. 7 is a schematic view of an embodiment of a chain elongation detecting device;
fig. 8 is a pulse diagram of the first detecting element, the third detecting element and the fourth detecting element in fig. 7.
Description of reference numerals:
10. a detection device; 100. a driving wheel; 200. a first driven wheel; 300. a first chain; 400. a first detection element; 500. a second detection element; 600. a drive member; 700. a second driven wheel; 800. a second chain; 900. a fourth detection element; 1000. a handrail belt.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1 and 7, in one embodiment, a method for detecting chain elongation is provided, which includes the following steps:
s100, the driving pulley 100 is driven to rotate in a first direction (as shown in a direction a in fig. 7), until the transmission section of the first chain 300 between the driving pulley 100 and the first driven pulley 200 is tensioned. In this way, by tensioning the transmission section of the first chain 300 between the driving wheel 100 and the first driven wheel 200, the elongation of the first chain 300 is concentrated on the connection section of the first chain 300 between the driving wheel 100 and the first driven wheel 200, so as to ensure the accuracy of the detection result and prepare for the subsequent detection of the elongation of the first chain 300.
The first direction may be clockwise or counterclockwise. The following detailed description will be given by taking the first direction as a clockwise direction as an example, and should not be construed as limiting or restricting the embodiments of the present application. When the first direction is a counterclockwise direction, the principle is the same as or similar to that of the first direction being a clockwise direction, and the description thereof is omitted here.
It should be noted that the transmission section of the first chain 300 refers to a portion of the first chain 300 between the driving wheel 100 and the first driven wheel 200, which is used for transmitting the driving force (i.e., a portion of the first chain 300 in a tensioned state when the driving wheel 100 drives the first driven wheel 200 to rotate in the first direction); the connection section of the first chain 300 refers to a portion of the first chain 300 between the driving wheel 100 and the first driven wheel 200, which is used for connecting two ends of the transmission section (i.e. a portion of the first chain 300 in a slack state when the driving wheel 100 drives the first driven wheel 200 to rotate in the first direction).
The arc length of rotation refers to the length of the path of rotation of any point on the outer side wall of the wheel (i.e., the length of the arc length corresponding to the angle of rotation of the wheel).
It should be noted that the elongation of the first chain 300 refers to an increase of the actual length of the first chain 300 relative to the length of the first chain 300 when the transmission section and the connection section of the first chain 300 between the driving pulley 100 and the first driven pulley 200 are both tensioned.
S200, driving the driving wheel 100 to rotate along the reverse direction of the first direction. So, through turning into the rotation arc length of action wheel 100 with the elongation of first chain 300, and then detect the rotation arc length of the action wheel 100 that is convenient for detect to the convenience and the accuracy that the elongation detected first chain 300 have been improved.
S300, when it is detected that the first driven pulley 200 starts to rotate in the reverse direction of the first direction, the arc length of rotation of the driving pulley 100 in the reverse direction of the first direction is detected, and the first elongation L1 of the first chain 300 is obtained. So, through the rotation arc length that detects action wheel 100 correspondence to obtain the elongation of first chain 300, easy operation is convenient, and detection efficiency is high, and detection cost is low, and does not influence the normal work of first chain 300.
It should be noted that, detecting that the first driven wheel 200 starts to rotate in the opposite direction of the first direction may be implemented by providing a detection element such as a linear velocity sensor to detect the linear velocity of the first driven wheel 200, and further determining whether the first driven wheel 200 starts to rotate in the opposite direction of the first direction, or may be implemented by providing a detection element such as a rotary encoder or a proximity switch to detect the rotation angle of the first driving wheel 200, and further determining whether the first driven wheel 200 starts to rotate in the opposite direction of the first direction.
It should be noted that, detecting the arc length of the driving wheel 100 in the opposite direction to the first direction may directly detect the arc length of the driving wheel 100 in the opposite direction to the first direction, or may detect the rotation angle of the driving wheel 100 in the opposite direction to the first direction, and further calculate the arc length of the driving wheel 100 in the opposite direction to the first direction according to the corresponding rotation angle and the radius of the driving wheel 100.
As shown in fig. 2, when it is detected that the first driven pulley 200 starts to rotate in the opposite direction of the first direction, S310 detects a rotation angle of the driving pulley 100 in the opposite direction of the first direction, and calculates a rotation arc length of the driving pulley 100 according to the rotation angle of the driving pulley 100 in the opposite direction of the first direction and a radius of the driving pulley 100, thereby obtaining a first elongation L1 of the first chain 300. Like this, through the turned angle that detects action wheel 100 along the opposite direction of first direction, and then calculate the arc length of rotation of action wheel 100 along the opposite direction of first direction according to the turned angle of the action wheel 100 that detects and the radius of action wheel 100 to obtain first elongation L1 of first chain 300, easy operation is convenient, and detection efficiency is high, and detection cost is low, and does not influence the normal work of first chain 300.
As shown in fig. 3, in S311, when the driver 100 is driven to rotate in the reverse direction of the first direction, the detection and counting of the pulses of the first detection element 400 are started. In this way, by detecting and counting the pulses of first detecting element 400, the real-time rotation angle of driving wheel 100 in the opposite direction of the first direction can be calculated according to the detected number of pulses of first detecting element 400 and the number of pulses generated by one rotation of driving wheel 100, so that the accuracy and the detection efficiency of detecting the rotation angle of driving wheel 100 are improved.
S312, when it is detected that the first driven wheel 200 starts to rotate in the opposite direction of the first direction, the number of pulses of the first detecting element 400 is recorded, the rotation angle of the driving wheel 100 in the opposite direction of the first direction is calculated according to the recorded number of pulses and the number of pulses generated when the driving wheel 100 rotates one turn, and the rotation arc length of the driving wheel 100 in the opposite direction of the first direction is calculated according to the rotation angle of the driving wheel 100 in the opposite direction of the first direction and the radius of the driving wheel 100, so as to obtain the first elongation L1 of the first chain 300. In this way, the rotation arc length of the driving wheel 100 in the opposite direction of the first direction is counted by the recorded number of pulses of the first detecting element 400, the number of pulses generated by one rotation of the driving wheel 100, and the radius of the driving wheel 100, and the first elongation L1 of the first chain 300 is obtained, so that the accuracy of detecting the elongation of the first chain 300 is improved.
As shown in fig. 4, when the capstan 100 is driven to rotate in the reverse direction of the first direction, the linear velocity of the capstan 100 rotating in the reverse direction of the first direction is detected and counted S320. Thus, by detecting and timing the linear velocity of the driving wheel 100 in real time, the corresponding relationship between the linear velocity of the driving wheel 100 and the time is obtained, and the corresponding arc length of the driving wheel 100 in the opposite direction of the first direction can be calculated.
S330, when it is detected that the first driven wheel 200 starts to rotate in the opposite direction of the first direction, the detection and timing of the linear velocity of the driving wheel 100 are stopped, and further, the arc length of rotation of the driving wheel 100 can be calculated according to the corresponding relationship between the linear velocity and the time in the process that the driving wheel 100 rotates in the opposite direction of the first direction, so as to obtain the first elongation L1 of the first chain 300. Thus, the rotation arc length of the driving wheel 100 is calculated according to the corresponding relationship between the linear velocity and the time in the process that the driving wheel 100 rotates in the opposite direction of the first direction (i.e. according to the detected linear velocity and the corresponding time of the driving wheel 100, a functional relationship between the linear velocity and the time is established, and then the function is integrated to obtain the rotation arc length corresponding to the driving wheel 100), so as to obtain the first elongation L1 of the first chain 300.
S400, after the T period, detecting the second elongation L2 of the first chain 300 again, and then calculating the elongation rate V of the first chain 300 according to the first elongation L1, the second elongation L2 and the time T, where V is (L2-L1)/T. When the second elongation L2 is greater than or equal to the first preset value, or the elongation rate V of the first chain 300 is greater than the second preset value, an abnormal warning is sent out to the first chain 300. When the second elongation L2 is greater than or equal to the third preset value, or the elongation rate V of the first chain 300 is greater than the fourth preset value, a fault warning of the first chain 300 is sent out, and the driving of the driving wheel 100 is stopped. In addition, the third preset value is greater than the first preset value, and the fourth preset value is greater than the second preset value. Like this, through the detection plan of the extension of formulating first chain 300 to regularly detect the extension of first chain 300 according to the detection plan that corresponds, and then realize monitoring the extension of first chain 300, and can carry out corresponding processing according to the result and the fortune dimension suggestion that detect, thereby improved the security in the use of first chain 300.
The first elongation L1 and the second elongation L2 only indicate detection values at which the elongations of the first chain 300 are detected at different timings. The first preset value, the second preset value, the third preset value and the fourth preset value may be specific values or a value range. The first preset value, the second preset value, the third preset value and the fourth preset value can be flexibly adjusted according to actual needs, and only the safety of the first chain 300 in the using process can be guaranteed.
As shown in fig. 5 and 7, in one embodiment, another method for detecting chain elongation is provided, which includes the following steps:
and S500, driving the driving wheel 100 to rotate along the first direction until the transmission section of the second chain 800 between the first driven wheel 200 and the second driven wheel 700 is tensioned. In this way, by driving the driving wheel 100 to rotate in the first direction, the transmission section of the first chain 300 between the driving wheel 100 and the first driven wheel 200 is tensioned, and the transmission section of the second chain 800 between the first driven wheel 200 and the second driven wheel 700 is tensioned, so that the elongation of the first chain 300 is concentrated on the connection section of the first chain 300 between the driving wheel 100 and the first driven wheel 200, and the elongation of the second chain 800 is concentrated on the connection section of the second chain 800 between the first driven wheel 200 and the second driven wheel 700, thereby improving the accuracy of the detection result, and preparing for subsequent detection of the elongation of the first chain 300 and the elongation of the second chain 800.
It should be noted that the transmission section of the second chain 800 refers to a portion of the second chain 800 between the first driven wheel 200 and the second driven wheel 700, which is used for transmitting the driving force (i.e., when the first driven wheel 200 drives the second driven wheel 700 to rotate in the first direction, the second chain 800 is in a tensioned state); the connection section of the second chain 800 refers to a portion of the second chain 800 between the first driven wheel 200 and the second driven wheel 700, which is used for connecting two ends of the transmission section (i.e. a portion of the second chain 800 in a slack state when the first driven wheel 200 drives the second driven wheel 700 to rotate along the first direction).
And S600, driving the driving wheel 100 to rotate along the reverse direction of the first direction. Thus, the elongation of the first chain 300 is converted into the rotation arc length of the driving wheel 100 along the opposite direction of the first direction, and the elongation of the second chain 800 is converted into the rotation arc length of the first driven wheel 200 along the opposite direction of the first direction, so that the rotation arc lengths corresponding to the driving wheel 100 and the first driven wheel 200 which are convenient to detect are detected, and the convenience of detecting the elongations of the first chain 300 and the second chain 800 is improved.
S700, when it is detected that the first driven wheel 200 starts to rotate in the opposite direction of the first direction, detecting a rotational arc length of the driving wheel 100 in the opposite direction of the first direction, and further obtaining a third elongation L3 of the first chain 300; when it is detected that the second driven wheel 700 starts to rotate in the reverse direction of the first direction, the arc length of rotation of the first driven wheel 200 in the reverse direction of the first direction is detected, and the fourth elongation L4 of the second chain 800 is obtained. Thus, the arc lengths of the rotation of the driving wheel 100 and the first driven wheel 200 in the opposite direction of the first direction are detected, so that the elongation of the first chain 300 and the elongation of the second chain 800 can be detected simultaneously in one detection process, and the detection efficiency of detecting the elongation of the multi-strand chains is improved.
As shown in fig. 6 to 8, in S710, when the driving pulley 100 starts to rotate in the reverse direction of the first direction, the pulses of the first detecting element 400 and the third detecting element are detected and counted, respectively, and further, the arc length of rotation of the driving pulley 100 in the reverse direction of the first direction can be calculated based on the detected number of pulses of the first detecting element 400 (as shown by n1 in fig. 6), the number of pulses generated by one rotation of the driving pulley 100, and the radius of the driving pulley 100, and the arc length of rotation of the first driven pulley 200 in the reverse direction of the first direction can be calculated based on the detected number of pulses of the third detecting element (as shown by n2 in fig. 6), the number of pulses generated by one rotation of the first driven pulley 200, and the radius of the first driven pulley 200, so that the third elongation L3 of the first chain 300 and the third elongation L4 of the second chain 800 can be obtained. Thus, the pulses of the first detecting element 400 and the third detecting element are detected and counted respectively, so that the arc length of the rotation of the driving wheel 100 can be calculated according to the pulse number of the first detecting element 400, and the arc length of the rotation of the first driven wheel 200 can be calculated according to the pulse number of the third detecting element, thereby realizing the detection of the elongation of the multi-strand chain and improving the efficiency and accuracy of the detection.
It should be noted that, when the driving wheel 100 starts to rotate in the opposite direction of the first direction, the connecting section of the first chain 300 needs to be driven to be tensioned; therefore, when the driving pulley 100 starts to rotate in the reverse direction of the first direction, the third detecting element does not generate a pulse until the first driven pulley 200 starts to rotate in the reverse direction of the first direction.
Note that B in fig. 8 indicates a pulse signal of the first detection element 400; c in fig. 8 represents a pulse signal of the third detection element; d in fig. 8 represents a pulse signal of the fourth detection element 900.
The chain elongation detection method and the detection device 10 have at least the following advantages: (1) the rotation arc length that turns into action wheel 100 through the elongation with the chain is long, and then measures through the rotation arc length of action wheel 100 to the convenient detection to according to the elongation that obtains the chain (the elongation of chain equals the rotation arc length that action wheel 100 corresponds promptly), improved the accuracy of the detection of chain elongation, and reduced the detection degree of difficulty of chain elongation. (2) Through the rotation direction of control action wheel 100 for the elongation of chain turns into the rotation arc length of action wheel 100, and then can be not needing dismantling equipment, do not influence equipment work, and need not be through under the prerequisite of manual measurement, just can carry out the efficient to the elongation of chain and detect, thereby improved the detection efficiency to the chain elongation, and easy operation is convenient.
As shown in fig. 7, in one embodiment, there is further provided a chain elongation detecting apparatus 10, which includes a driving pulley 100, a first driven pulley 200, a first chain 300, a first detecting element 400, a second detecting element 500, and a controller (not shown). Wherein, the driving wheel 100 can rotate under the driving force. The first chain 300 is sleeved on the outer side walls of the driving wheel 100 and the first driven wheel 200, so that the driving wheel 100 can drive the first driven wheel 200 to rotate through the first chain 300. First detecting element 400 is for detecting the length of the rotational arc of capstan 100. The second sensing member 500 is used to sense whether the first driven wheel 200 is rotated. The controller is communicatively coupled to both the first sensing element 400 and the second sensing element 500.
When the device 10 for detecting the elongation of the chain according to the above embodiment is used, first, the driving pulley 100 is driven by a driving mechanism (e.g., a motor or a rotary hydraulic cylinder, etc.) or a person to rotate in a first direction, so that the transmission section of the first chain 300 between the driving pulley 100 and the first driven pulley 200 is tensioned, the connection section of the first chain 300 between the driving pulley 100 and the first driven pulley 200 is loosened, and further, the elongation of the first chain 300 is concentrated on the connection section of the first chain 300, so as to prepare for subsequent detection of the elongation of the first chain 300 and ensure the accuracy of detection of the elongation of the first chain 300. Then, the driving wheel 100 is driven to rotate in the opposite direction of the first direction, so that the elongation of the first chain 300 is converted into the rotation arc length of the driving wheel 100 in the opposite direction of the first direction, and the rotation arc length of the driving wheel 100 convenient to detect is detected, so that the difficulty in detecting the elongation of the first chain 300 is reduced, and the convenience in detecting the elongation of the first chain 300 is improved. Finally, when the second detecting element 500 detects that the first driven wheel 200 starts to rotate in the opposite direction of the first direction, the second detecting element 500 feeds back the detected signal to the controller, so that the controller can control the first detecting element 400 to detect the rotation arc length of the driving wheel 100 in the opposite direction of the first direction, and further obtain the first elongation of the first chain 300.
Wherein, action wheel 100 and first driven wheel 200 can be sprocket and gear isotructure, and action wheel 100 and first driven wheel 200 homoenergetic rotate around fixed axis of rotation, only need can realize that action wheel 100 passes through first chain 300 and drives first driven wheel 200 and rotate can.
The controller can be a single chip microcomputer or a programmable logic controller and the like. The controller is in communication connection with both the first detecting element 400 and the second detecting element 500, and the controller can communicate with both the first detecting element 400 and the second detecting element 500 only by means of data lines, bluetooth and the like.
The first detecting element 400 may be a linear velocity sensor, a rotary encoder, or a proximity switch. First detecting element 400 may be correspondingly disposed on first driven wheel 200 or on one side of first driven wheel 200, and only needs to be able to detect the arc length of rotation of driving wheel 100.
The second detecting element 500 may be a linear velocity sensor, a rotary encoder, or a proximity switch. The second detecting element 500 may be correspondingly disposed on the driving wheel 100 or on one side of the driving wheel 100, and only needs to detect whether the first driven wheel 200 rotates.
Further, the first detecting element 400 includes a rotary encoder (not shown) fixedly connected to the driving wheel 100, a rotation axis of the driving wheel 100 coincides with a rotation axis of the rotary encoder, and the rotary encoder is configured to detect a rotation angle of the driving wheel 100, so that the controller can calculate a rotation arc length corresponding to the driving wheel 100 according to the rotation angle of the driving wheel 100 and a radius of the driving wheel 100. Thus, when the driving wheel 100 rotates in the opposite direction of the first direction, the rotary encoder is used for detecting the rotation angle of the driving wheel 100 in the opposite direction of the first direction, so that the controller can calculate the rotation arc length corresponding to the driving wheel 100 according to the rotation angle of the driving wheel 100 in the opposite direction of the first direction and the radius of the driving wheel 100, thereby obtaining the first elongation of the first chain 300, and improving the accuracy and convenience of detection by the detection device 10.
In one embodiment, the detecting device 10 further includes a driving member 600 for driving the driving wheel 100 to rotate, a second driven wheel 700, a second chain 800, a third detecting element for detecting a rotation arc length of the first driven wheel 200, and a fourth detecting element 900 for detecting whether the second driven wheel 700 rotates, the controller is in communication connection with the driving member 600, the third detecting element, and the fourth detecting element 900, and the second chain 800 is sleeved on outer sidewalls of the first driven wheel 200 and the second driven wheel 700, so that the first driven wheel 200 can drive the second driven wheel 700 to rotate through the second chain 800. Like this, through converting the elongation of first chain 300 into the rotation arc length that action wheel 100 corresponds, and convert the elongation of second chain 800 into the rotation arc length that first driven wheel 200 corresponds, and then utilize first detecting element 400 and third detecting element to detect the rotation arc length that action wheel 100 corresponds and the arc length that first driven wheel 200 corresponds respectively, thereby obtain the elongation of first chain 300 and the elongation of second chain 800, and realize detecting simultaneously many chains, detection efficiency and the suitability of detection device 10 have been improved.
The driving member 600 may be a stepping motor, a servo motor, or a rotary hydraulic cylinder, and only needs to drive the driving wheel 100 to rotate.
The third detecting element may be a linear velocity sensor, a rotary encoder, a proximity switch, or the like. The third detecting element can synchronously replace the second detecting element 500 to realize corresponding functions, that is, the third detecting element detects whether the first driven wheel 200 generates a rotation arc length to judge whether the first driven wheel 200 rotates. The third detecting element may be correspondingly disposed on the first driven wheel 200 or on one side of the first driven wheel 200, and the like, and only the arc length of rotation of the first driven wheel 200 needs to be detected.
The fourth detecting element 900 may be a linear velocity sensor, a rotary encoder, or a proximity switch. The fourth detecting element 900 may be correspondingly disposed on the second driven wheel 700, one side of the second driven wheel 700, or the handrail 1000, and only needs to be able to detect whether the second driven wheel 700 rotates.
The second driven wheel 700 may be a sprocket, a gear, or the like. The second driven wheel 700 can rotate around a fixed rotation axis, and only the first driven wheel 200 can drive the second driven wheel 700 to rotate through the second chain 800.
The controller is in communication connection with the driving part 600, the third detection element and the fourth detection element 900, and can be in connection with the driving part 600, the third detection element and the fourth detection element 900 through data lines or bluetooth, and only the controller needs to be in communication with the driving part 600, the third detection element and the fourth detection element 900.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for detecting chain elongation is characterized by comprising the following steps:
driving the driving wheel to rotate along a first direction until a transmission section of a first chain between the driving wheel and the first driven wheel is tensioned;
driving the driving wheel to rotate along the reverse direction of the first direction;
when the first driven wheel is detected to start rotating along the direction opposite to the first direction, the rotating arc length of the driving wheel along the direction opposite to the first direction is detected, and then the first elongation L1 of the first chain is obtained.
2. The method for detecting the elongation of a chain according to claim 1, wherein the step of detecting the arc length of rotation of the driving pulley in the direction opposite to the first direction when the first driven pulley is detected to start rotating in the direction opposite to the first direction, thereby obtaining the first elongation L1 of the first chain, comprises:
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the rotation angle of the driving wheel along the reverse direction of the first direction is detected, the rotation arc length of the driving wheel is calculated according to the rotation angle of the driving wheel along the reverse direction of the first direction and the radius of the driving wheel, and then the first elongation L1 of the first chain is obtained.
3. The method for detecting the elongation of the chain according to claim 2, wherein the step of detecting the rotation angle of the driving pulley in the opposite direction to the first direction when the first driven pulley starts to rotate in the opposite direction to the first direction, and calculating the arc length of the rotation of the driving pulley according to the rotation angle of the driving pulley in the opposite direction to the first direction and the radius of the driving pulley, thereby obtaining the first elongation L1 of the first chain comprises:
when the driving wheel is driven to rotate along the reverse direction of the first direction, the pulses of the first detection element are detected and counted;
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the pulse number of the first detection element is recorded, the rotation angle of the driving wheel along the reverse direction of the first direction is calculated according to the recorded pulse number and the pulse number generated by one rotation of the driving wheel, and further the rotation arc length of the driving wheel along the reverse direction of the first direction is calculated according to the rotation angle of the driving wheel along the reverse direction of the first direction and the radius of the driving wheel, so that the first elongation L1 of the first chain is obtained.
4. The method for detecting the elongation of a chain according to claim 1, wherein the step of detecting the arc length of rotation of the driving pulley in the direction opposite to the first direction when the first driven pulley is detected to start rotating in the direction opposite to the first direction, thereby obtaining the first elongation L1 of the first chain, comprises:
when the driving wheel is driven to rotate along the reverse direction of the first direction, the linear speed of the driving wheel rotating along the reverse direction of the first direction is detected and timed;
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the detection and timing of the linear speed of the driving wheel are stopped, and then the rotating arc length of the driving wheel can be calculated according to the corresponding relation between the linear speed and the time in the process that the driving wheel rotates along the reverse direction of the first direction, so that the first elongation L1 of the first chain is obtained.
5. The method for detecting the elongation of a chain according to any one of claims 1 to 4, wherein after the step of detecting the arc length of rotation of the driving pulley in the direction opposite to the first direction when the first driven pulley is detected to start rotating in the direction opposite to the first direction, thereby obtaining the first elongation L1 of the first chain, the method comprises:
after the T period, detecting the second elongation L2 of the first chain again, and calculating the elongation rate V of the first chain according to the first elongation L1, the second elongation L2 and the time T, wherein V is (L2-L1)/T;
when the second elongation L2 is greater than or equal to a first preset value, or the elongation rate V of the first chain is greater than a second preset value, sending an abnormal prompt to the first chain;
when the second elongation L2 is greater than or equal to a third preset value, or the elongation rate V of the first chain is greater than a fourth preset value, sending a first chain fault prompt and stopping driving the driving wheel;
in addition, the third preset value is larger than the first preset value, and the fourth preset value is larger than the second preset value.
6. A method for detecting chain elongation is characterized by comprising the following steps:
the driving wheel is driven to rotate along a first direction until a transmission section of a second chain between the first driven wheel and the second driven wheel is tensioned;
driving the driving wheel to rotate along the reverse direction of the first direction;
when the first driven wheel is detected to start to rotate along the reverse direction of the first direction, the rotating arc length of the driving wheel along the reverse direction of the first direction is detected, and then a third elongation L3 of the first chain is obtained; when it is detected that the second driven wheel starts to rotate in the direction opposite to the first direction, the arc length of rotation of the first driven wheel in the direction opposite to the first direction is detected, and a fourth elongation L4 of the second chain is obtained.
7. The method for detecting the elongation of a chain according to claim 6, wherein when it is detected that the first driven pulley starts to rotate in the direction opposite to the first direction, the arc length of rotation of the driving pulley in the direction opposite to the first direction is detected, and a third elongation L3 of the first chain is obtained; when it is detected that the second driven wheel starts to rotate in the direction opposite to the first direction, the step of detecting the arc length of rotation of the first driven wheel in the direction opposite to the first direction to obtain a fourth elongation L4 of the second chain includes:
when the driving wheel starts to rotate in the direction opposite to the first direction, pulses of the first detection element and the third detection element are detected and counted respectively, so that the arc length of rotation of the driving wheel in the direction opposite to the first direction can be calculated according to the detected number of pulses of the first detection element, the number of pulses generated when the driving wheel rotates once, and the radius of the driving wheel, and the arc length of rotation of the first driven wheel in the direction opposite to the first direction can be calculated according to the detected number of pulses of the third detection element, the detected number of pulses generated when the first driven wheel rotates once, and the radius of the first driven wheel, so that the third elongation L3 of the first chain and the third elongation L4 of the second chain can be obtained.
8. A chain elongation detection device, comprising:
the driving wheel can rotate under the action of driving force;
a first driven wheel;
the first chain is sleeved on the outer side walls of the driving wheel and the first driven wheel, so that the driving wheel can drive the first driven wheel to rotate through the first chain;
the first detection element is used for detecting the rotation arc length of the driving wheel;
the second detection element is used for detecting whether the first driven wheel rotates or not; and
a controller in communicative connection with both the first detection element and the second detection element.
9. The device for detecting the elongation of a chain according to claim 8, wherein the detecting element comprises a rotary encoder fixedly connected to the driving wheel, the rotation axis of the driving wheel coincides with the rotation axis of the rotary encoder, and the rotary encoder is configured to detect the rotation angle of the driving wheel, so that the controller can calculate the corresponding rotation arc length of the driving wheel according to the rotation angle of the driving wheel and the radius of the driving wheel.
10. The device for detecting the elongation of a chain according to claim 8 or 9, wherein the device further comprises a driving member for driving the driving wheel to rotate, a second driven wheel, a second chain, a third detecting element for detecting the rotation arc length of the first driven wheel, and a fourth detecting element for detecting whether the second driven wheel rotates, the controller is in communication connection with the driving member, the third detecting element, and the fourth detecting element, and the second chain is sleeved on the outer side walls of the first driven wheel and the second driven wheel, so that the first driven wheel can drive the second driven wheel to rotate through the second chain.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210011624.8A CN114440812A (en) | 2022-01-06 | 2022-01-06 | Chain elongation detection method and detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210011624.8A CN114440812A (en) | 2022-01-06 | 2022-01-06 | Chain elongation detection method and detection device |
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