CN115744558A - Speed detection device for passenger conveyor - Google Patents
Speed detection device for passenger conveyor Download PDFInfo
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- CN115744558A CN115744558A CN202111025556.2A CN202111025556A CN115744558A CN 115744558 A CN115744558 A CN 115744558A CN 202111025556 A CN202111025556 A CN 202111025556A CN 115744558 A CN115744558 A CN 115744558A
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- drive wheel
- passenger conveyor
- encoder
- speed detection
- speed
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- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 239000000428 dust Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 56
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The present invention relates to a speed detection device for a passenger conveyor. A speed detection device for a passenger conveyor comprising: an encoder including a rotating shaft; a first drive wheel for torsionally connected to a main shaft of the passenger conveyor; a second transmission wheel, which is connected to the rotating shaft of the encoder in a torsion-proof manner; and a flexible transmission configured in a loop shape and connected to the first transmission wheel and the second transmission wheel, wherein the flexible transmission is configured to proportionally transmit the rotation of the first transmission wheel to the second transmission wheel, wherein the encoder is configured to detect the rotation speed and/or the rotation direction of the first transmission wheel from the rotation of the second transmission wheel.
Description
Technical Field
The present invention relates to a speed detection device. More particularly, the present invention relates to a speed detection device for a passenger conveyor, such as an escalator or a moving walkway.
Background
Passenger conveyors such as escalators and moving walks are generally installed in public places such as subways, railway stations, airports, etc. to convey a large number of passengers. Escalators are commonly used for passenger transport between different floors. Travelators are commonly used for passenger transport on a horizontal surface. Such escalators or travelators typically comprise a support structure in the form of a truss, a main shaft arranged at one end of the support structure and a conveyor element arranged in the support structure and connected in an endless form. In an escalator, the endless conveying member may be a step belt. In a travelator, the endless conveyor element may be a flat conveyor belt. For example, the spindle is connected to the sprocket wheel in a rotationally fixed manner and to the chain of the endless conveying element. The motor drives the main shaft to rotate, and further drives the annular conveying component.
Escalators or moving walkways also typically include safety devices to monitor the speed of operation of the escalator or moving walkway. When the operation speed of the escalator or moving walkway is lower or higher than a predetermined speed range, the escalator or moving walkway should be stopped in time to protect passengers from injury. The escalator or moving walkway can also comprise an auxiliary brake to better achieve braking of the main shaft and the escalator or moving walkway.
Existing security devices use flexible magnetic strips for speed detection. The magnetic stripe includes a plurality of magnetic poles that set up along length direction interval. The magnetic strip is wound on a main shaft of the escalator or the moving sidewalk. When the motor drives the main shaft to rotate, the sensor determines the running speed of the escalator or the moving pavement by detecting the magnetic poles.
However, the spacing of the magnetic poles on the flexible magnetic strip is susceptible to changes due to the strip being stretched or due to differences in the radius of the spindle. Therefore, the existing method for measuring the speed by adopting the magnetic stripe has poor anti-jamming capability, large signal fluctuation range and easy false alarm of overspeed fault, thus causing the accidental stop of the escalator or the moving sidewalk. In addition, the auxiliary brake can cause the magnetic strip on the main shaft to displace when braking, which can cause inaccurate speed measurement results and influence the normal operation of the escalator or moving walkway.
For this reason, a speed detection device for a passenger conveyor having a higher interference resistance is required.
Disclosure of Invention
It is an object of the present invention to provide a speed detection device for a passenger conveyor having greater interference rejection capability. Another object of the present invention is to provide a speed detection device for a passenger conveyor, which has higher detection accuracy. Another object of the present invention is to provide a speed detecting device that effectively ensures the normal operation of a passenger conveyor.
One aspect of the present invention provides a speed detection device for a passenger conveyor, including: an encoder including a rotating shaft; a first drive wheel for torsionally connected to a main shaft of the passenger conveyor; a second drive wheel, which is connected to the shaft of the encoder in a rotationally fixed manner; and a flexible transmission configured in a loop and connected to the first transmission wheel and the second transmission wheel, wherein the flexible transmission is configured to proportionally transmit rotation of the first transmission wheel to the second transmission wheel, wherein the encoder is configured to detect a rotation speed and/or a rotation direction of the first transmission wheel from rotation of the second transmission wheel.
According to an embodiment of the invention, the first drive wheel is a first sprocket, the second drive wheel is a second sprocket, and the flexible drive is a chain.
According to an embodiment of the invention, the speed detecting device further comprises a bracket assembly for fixing to a truss of the passenger conveyor, wherein the second transmission wheel is rotatably fixed to the bracket assembly.
According to an embodiment of the invention, the bracket assembly comprises a sliding slot, the second transmission wheel is rotatably fixed to the sliding slot, and when the second transmission wheel is installed, the second transmission wheel can move along the sliding slot to adjust the installation position of the second transmission wheel.
According to an embodiment of the invention, the speed detection device further comprises a dust cover connected to the carriage assembly and covering the first transmission wheel, the second transmission wheel, the flexible transmission and the encoder.
Another aspect of the present invention provides a passenger conveyor including: a driver; a spindle for being driven to rotate by a driver; according to an embodiment of the invention, the speed detection device is provided with a first transmission wheel connected to the main shaft in a torque-proof manner, and the encoder is configured to detect the running speed and/or the running direction of the passenger conveyor according to the rotation of the second transmission wheel of the speed detection device.
According to an embodiment of the invention, the passenger conveyor is an escalator or a moving walkway.
The speed detecting device according to an embodiment of the present invention includes an encoder, a transmission wheel, and a flexible transmission to detect the operation speed and the operation direction of the spindle and the passenger conveyor. Compared with the existing speed detection device adopting a magnetic strip, the speed detection device provided by the embodiment of the invention is not easily influenced by external factors (such as impact force on the spindle, size change of the spindle and the like), and therefore, the speed detection device has higher anti-interference capability and higher detection precision and sensitivity. In addition, the speed detection device according to the embodiment of the invention can judge the speed of the passenger conveyor more accurately through the encoder, and effectively ensure the normal operation of the passenger conveyor. When the chain transmission is used, the speed detecting device according to the embodiment of the present invention can more precisely transmit the rotation of the main shaft to the encoder, so that the operation speed of the passenger conveyor can be more accurately detected.
Drawings
Fig. 1 is a schematic view of a speed detection device installed in a passenger conveyor according to some embodiments of the invention.
FIG. 2 is a schematic diagram of a speed detection device according to some embodiments of the invention.
FIG. 3 is an exploded schematic view of a speed detection apparatus according to some embodiments of the invention.
Detailed Description
Hereinafter, embodiments of the present invention are described with reference to the drawings. The following detailed description and drawings are illustrative of the principles of the invention, which is not to be limited to the preferred embodiments described, but rather is to be defined by the scope of the appended claims. The invention will now be described in detail with reference to exemplary embodiments thereof, some of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings, in which like reference numerals refer to the same or similar elements in different drawings unless otherwise indicated. The aspects described in the following exemplary embodiments do not represent all aspects of the present invention. Rather, these aspects are merely exemplary of the systems and methods according to the various aspects of the present invention as recited in the appended claims.
The invention provides a speed detection device for a passenger conveyor. According to an embodiment of the invention, the passenger conveyor comprises an escalator or a moving walkway.
Hereinafter, exemplary embodiments of the present invention are described with reference to the accompanying drawings. It is to be understood that only certain embodiments of the invention have been shown in the drawings and that the scope of the invention should be determined from the following claims.
Fig. 1 is a schematic view of a speed detection device installed in a passenger conveyor according to some embodiments of the invention. The passenger conveyor may include a drive, a truss, a spindle 200, and a speed detection device 100. The spindle 200 may be driven to rotate by a driver. It should be noted that other components of the passenger conveyor are not shown in fig. 1, and only one section of the truss is shown in fig. 1. In some embodiments, the passenger conveyor may also include an auxiliary brake 300. The auxiliary brake 300 may be mounted on the truss. The auxiliary brake 300 may be driven to directly engage with the main shaft 200 to apply a braking force to the main shaft 200 and the passenger conveyor.
FIG. 2 is a schematic diagram of a speed detection device according to some embodiments of the invention. FIG. 3 is an exploded schematic view of a speed detection apparatus according to some embodiments of the invention.
According to some embodiments of the present invention, as shown in FIG. 2, the speed sensing device 100 includes an encoder 10, a first drive wheel 20, a second drive wheel 30, and a flexible drive 40. In some embodiments, the first drive wheel 20 and the second drive wheel 30 are both sprockets and the flexible drive 40 is a chain.
According to some embodiments of the invention, the first drive wheel 20 of the speed detection device 100 is adapted to be torsionally connected to the main shaft 200 of the passenger conveyor. Therefore, the first drive wheel 20 can rotate in synchronization with the main shaft 200.
The encoder 10 includes a shaft (not shown). According to some embodiments of the invention, the second transmission wheel 30 is connected torsionally fixed to the shaft of the encoder 10. Thus, the rotation shaft of the encoder 10 rotates in synchronization with the second transmission wheel 30. According to some embodiments of the present invention, the encoder 10 is a rotary encoder. The encoder 10 may be one of an electromagnetic rotary encoder, a photoelectric rotary encoder, and a contact type rotary encoder. According to some embodiments of the present invention, encoder 10 is an incremental rotary encoder or an absolute rotary encoder.
According to some embodiments of the invention, the flexible drive 40 is configured in a ring shape. The flexible transmission 40 is connected to the first transmission wheel 20 and to the second transmission wheel 30. In particular, the flexible transmission 40 is arranged to partially surround the first transmission wheel 20 and the second transmission wheel 30, respectively.
According to some embodiments of the invention, the flexible drive 40 is configured to proportionally transfer the rotation of the first drive wheel 20 to the second drive wheel 30. Thus, the speed detection device according to an embodiment of the present invention can proportionally transmit the rotation of the spindle 200 of the passenger conveyor (which will be connected torsionally with the first transmission wheel 20) to the encoder 10 connected torsionally with the second transmission wheel 30, by means of the flexible transmission 40. In some embodiments, the ratio may be determined based on the diameter of the spindle.
According to an embodiment of the present invention, the encoder 10 is configured to detect the operating speed of the passenger conveyor based on the rotation of the second transmission wheel 30. In some embodiments, the encoder 10 may also be configured to detect the direction of travel of the passenger conveyor based on the rotation of the second drive wheel 30.
Specifically, the encoder 10 generates a series of pulses as its shaft and other associated components rotate synchronously with the second drive wheel 30. By counting the number of pulses and the phase difference of the encoder 10 per unit time, the rotational speed and/or the rotational direction of the second transmission wheel 30, and thus the rotational speed and/or the rotational direction of the first transmission wheel 20 and the spindle 200 of the passenger conveyor can be determined. Thus, the operating speed and/or the operating direction of the passenger conveyor can be determined by the speed detection device according to an embodiment of the invention.
In some embodiments, as shown in FIG. 2, the speed sensing device 100 further includes a carriage assembly 50 and a dust cover 60.
The bracket assembly 50 is for securing to a truss of a passenger conveyor. The second transmission wheel 30 is rotatably fixed to the carriage assembly 50. Thus, the speed sensing device 100 may be secured to the passenger conveyor by the carriage assembly 50.
In some embodiments, as shown in fig. 1 and 2, the carriage assembly 50 includes a sliding channel 51. The second transmission wheel 30 may be rotatably fixed to the sliding groove 51. In some embodiments, when the second transmission wheel 30 is mounted, the second transmission wheel 30 can be moved along the sliding groove 51 to adjust the mounting position of the second transmission wheel 30. Thereby, the speed detection device 100 can be adapted to different installation environments, and can be more conveniently installed to the passenger conveyor.
In some embodiments, a dust cover 60 is coupled to the carriage assembly 50 and covers the encoder 10, the first drive wheel 20, the second drive wheel 30, and the flexible drive 40. The dust cover 60 may provide protection for other components of the speed sensing device 100 to improve the accuracy and stability of the speed sensing device 100.
It is described above that both the first and second drive wheels are sprockets and the flexible drive is a chain. However, the present invention is not limited thereto. According to embodiments of the present invention, the transmission between the flexible transmission and the first and second transmission wheels may employ various flexible or flexible transmissions, such as a chain transmission, a belt transmission, or a rope transmission, among others. In some embodiments, the first and second drive wheels may be pulleys and the flexible drive is a drive belt. When a belt drive is employed between the flexible drive member and the first and second drive wheels, the drive belt may comprise a friction-type drive belt (e.g., flat belt, V-belt, etc.) or a meshing-type drive belt (e.g., synchronous belt).
While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the construction and methods of the embodiments described above. On the contrary, the invention is intended to cover various modifications and equivalent arrangements. In addition, while the various elements and method steps of the disclosed invention are shown in various example combinations and configurations, other combinations, including more, less or all of the elements or methods, are also within the scope of the invention.
Claims (7)
1. A speed detection device for a passenger conveyor, comprising:
an encoder including a rotating shaft;
a first drive wheel for torsionally connected to a main shaft of the passenger conveyor;
a second drive wheel, which is connected to the shaft of the encoder in a rotationally fixed manner; and
a flexible drive configured in a loop and connected to the first drive wheel and the second drive wheel, wherein the flexible drive is configured to proportionally transfer rotation of the first drive wheel to the second drive wheel,
wherein the encoder is configured to detect a rotational speed and/or a rotational direction of the first drive wheel from rotation of the second drive wheel.
2. The speed sensing device of claim 1, wherein said first drive wheel is a first sprocket, said second drive wheel is a second sprocket, and said flexible drive is a chain.
3. The speed sensing device of claim 2, further comprising a carriage assembly for securing to a truss of the passenger conveyor, wherein the second drive wheel is rotatably secured to the carriage assembly.
4. The speed detection apparatus of claim 3, wherein the carriage assembly includes a slide slot, the second drive wheel is rotatably secured to the slide slot, and the second drive wheel is movable along the slide slot to adjust a mounting position of the second drive wheel when the second drive wheel is mounted.
5. The speed sensing device of any one of claims 2 to 4, further comprising a dust cover coupled to the carriage assembly and covering the first drive wheel, the second drive wheel, the flexible drive and the encoder.
6. A passenger conveyor comprising:
a driver;
a spindle for being driven to rotate by the driver;
the speed detection device according to any one of claims 1 to 5, wherein a first drive wheel of the speed detection device is connected to the spindle in a rotationally fixed manner, the encoder being configured to detect the operating speed and/or the operating direction of the passenger conveyor from a rotation of a second drive wheel of the speed detection device.
7. The passenger conveyor of claim 6, wherein the passenger conveyor is an escalator or a moving sidewalk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111025556.2A CN115744558A (en) | 2021-09-02 | 2021-09-02 | Speed detection device for passenger conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111025556.2A CN115744558A (en) | 2021-09-02 | 2021-09-02 | Speed detection device for passenger conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115744558A true CN115744558A (en) | 2023-03-07 |
Family
ID=85332089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111025556.2A Pending CN115744558A (en) | 2021-09-02 | 2021-09-02 | Speed detection device for passenger conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115744558A (en) |
-
2021
- 2021-09-02 CN CN202111025556.2A patent/CN115744558A/en active Pending
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