Wireless transmission coupling contact type escalator handrail temperature monitoring system and method

Abstract

The present invention discloses a wireless transmission coupled contact escalator handrail temperature monitoring system, including a field monitoring terminal, a remote monitoring terminal and a plurality of detection probe wheels; the probe wheel includes a mounting bracket, a wheel frame, a wheel axle, a coupling tire, a probe, an angle sensor, an ambient temperature sensor and a collector. The coupling tire is installed on the wheel axle to be used to rest on the handrail and be driven to rotate by the handrail; the probe is provided with a plurality of probes and is evenly installed on the inner circumference of the coupling tire; the probe includes a wireless transmission module and a magnetic flux and temperature sensor module, and the magnetic flux and temperature sensor module is used to collect the magnetic flux and temperature of the handrail; the angle sensor is connected to the wheel axle; the remote monitoring terminal obtains the temperature state and stress state of the handrail based on the detected temperature and magnetic flux. The present invention can be used for fault analysis, positioning and prediction by collecting temperature and magnetic flux data, and provides reliable data support for timely maintenance of the handrail.

Description

Technical Field

[0001] The present invention belongs to the technical field of escalator monitoring, and more specifically, relates to a wireless transmission coupling contact type escalator handrail temperature monitoring system and method. Background Art

[0002] The mechanical transmission mechanism is composed of a transmission device and moving parts driven by the transmission device. When the moving parts are in cyclic motion, such as a conveyor belt with metal inserts conveying materials, a vertical elevator wire rope reciprocating up and down, an escalator handrail or escalator step chain cyclic motion, if the moving parts are adjusted too tight, it will cause excessive friction and overheating, which will cause the outer material of the moving parts (if any) to accelerate aging, cracking, wear and other consequences, reducing the service life. In addition, overtightening will also cause the brake to overheat and the degree of harm is higher. It may cause the brake temperature to rise suddenly and burn out the internal components, causing brake failure and shortening the service life.

[0003] As a special equipment, escalators are responsible for the important task of transporting passengers in railway and urban rail transit, and their safety is of vital importance. In order to ensure the safety of passengers and reduce the occurrence of accidents, escalators need to be regularly inspected and maintained to ensure that the equipment is in good operating condition. However, the current maintenance of escalators mainly adopts manual periodic maintenance and fault repair, that is, periodic inspections are carried out by staff when there is no fault, and maintenance is carried out when a fault occurs. This method is a post-event behavior and cannot effectively prevent the occurrence of faults, which is not conducive to avoiding major accidents; at the same time, periodic maintenance may cause excessive maintenance or untimely maintenance, resulting in a lot of time, manpower, and material resources, poor results, and high difficulty and cost of operation.

[0004] The escalator handrail is a component that moves synchronously with the steps and passengers can hold on to increase standing stability. It is a key component of the escalator and is crucial to the safe operation of the escalator. The escalator handrail is always in circulation. When the tensioner is adjusted too tight and the friction is too large, its temperature may rise rapidly after it is turned on. High temperature not only affects the strength of the handrail, but also causes harm to passengers. If it is not checked in time, it will affect the operation of the escalator and threaten the safety of passengers' lives and property. At present, there are patents published on the technology of escalator handrail temperature monitoring, such as CN201711498149.7 online monitoring equipment, escalator and method for online monitoring of escalator. This patent discloses a method for detecting the temperature of an escalator handrail. However, this patent has the following shortcomings: (1) there is only one monitoring point, and it is impossible to locate the position causing high temperature; (2) the ambient temperature and the handrail temperature are the same component, and the ambient temperature will be affected by the handrail temperature field and cannot be measured accurately; (3) there is a gap between the temperature sensor and the handrail, and the measurement will be affected by the environment; (4) during data analysis, only the average value of the difference between the previous and next two time periods is compared, which has low universality and high false alarm rate; (5) it is a non-modular design with high design, manufacturing and installation costs. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a wireless transmission coupled contact escalator handrail temperature monitoring system and method, which can monitor the moving mechanical transmission mechanism and collect status data for fault analysis, positioning and prediction, provide reliable data support for the timely maintenance of the escalator, and provide effective technical means to ensure the safe operation of the escalator.

[0006] To achieve the above object, according to one aspect of the present invention, a wireless transmission coupled contact escalator handrail temperature monitoring system is provided, which is used to detect the temperature and magnetic flux of a cyclically moving handrail, and is characterized in that it includes an on-site monitoring terminal, a remote monitoring terminal and a plurality of detection probe wheels, wherein:

[0007] For each of the detection wheels, it includes a mounting bracket, a wheel frame, an axle, a coupling tire, a probe, an angle sensor, an ambient temperature sensor and a collector. The wheel frame is mounted on the mounting bracket, and the axle can be rotatably mounted on the wheel frame. The coupling tire is mounted on the axle to be used to rest against the handrail and be driven to rotate by the handrail. There are multiple probes and they are evenly mounted on the inner circumference of the coupling tire. The angle sensor is connected to the axle to position the handrail through the rotation of the coupling tire. The ambient temperature sensor is mounted on the wheel frame to obtain the ambient temperature and transmit it to the collector by wireless transmission. In addition,

[0008] Each of the probes comprises a probe base, a wireless transmission module and a magnetic flux and temperature sensor module which are installed on the probe base. The magnetic flux and temperature sensor module comprises a magnetic flux sensor and a temperature sensor to respectively collect the magnetic flux and temperature of the handrail and transmit them to the collector through the wireless transmission module.

[0009] The collector transmits the temperature and magnetic flux data to the on-site monitoring terminal via wireless transmission, and the on-site monitoring terminal transmits the data to the remote monitoring terminal via a wireless network. The remote monitoring terminal compares the temperature of each part of the handrail measured by the probe with the ambient temperature obtained by the ambient temperature sensor to obtain the temperature state of the handrail. In addition, the remote monitoring terminal obtains the stress state of the handrail based on the magnetic flux of each part of the handrail measured by the probe.

[0010] Preferably, each of the probes further comprises a wireless charging module mounted on the probe base;

[0011] The probe wheel also includes a wireless charging plate, which is installed on the mounting bracket to implement wireless charging for each probe, so that all the probes are charged alternately and periodically to avoid the situation of running out of power.

[0012] Preferably, the wireless charging plate is parallel to the coupled tire, a notch is provided at the bottom of the wireless charging plate, and a charging coil is provided in the notch.

[0013] Preferably, the coupling tire is a flexible sheet made of graphene foam to achieve coupling by close contact with the surface of the handrail.

[0014] Preferably, the collector transmits the temperature and magnetic flux data to the field monitoring terminal through an ultra-wideband wireless digital network, and the field monitoring terminal compresses all the magnetic flux and temperature data and transmits them to the remote monitoring terminal through a wireless network.

[0015] Preferably, the remote monitoring terminal analyzes the temperature of each part of the handrail measured by the probe and the ambient temperature obtained by the ambient temperature sensor within a set time period, obtains the temperature difference between the temperature of each part of the handrail and the ambient temperature, and then obtains the average value of the temperature difference, and then obtains the average deviation through the temperature of each part of the handrail and the average value, and records the corresponding time period and each part of the handrail to obtain the temperature status of the handrail.

[0016] Preferably, the collector includes a wireless receiving module, a wireless transmitting module and a storage module. The wireless receiving module receives the temperature and magnetic flux data collected by each probe through a wireless broadband network and transmits them to the storage module for storage. The wireless transmitting module transmits the temperature and magnetic flux data to the on-site monitoring terminal through the wireless broadband network.

[0017] Preferably, the collector is cylindrical and is coaxially mounted on the wheel axle.

[0018] Preferably, for a position on the handrail where friction is severe, a detection probe wheel is provided at each end of the position along the moving direction of the handrail, and the temperature change caused by the friction of the handrail at the position is analyzed by directly comparing the temperature difference at the two ends, so as to determine whether the position needs to be inspected and whether the position of the components in contact with the handrail on the escalator needs to be adjusted.

[0019] According to another aspect of the present invention, a monitoring method of the wireless transmission coupling contact type escalator handrail temperature monitoring system is also provided, which is characterized by comprising the following steps:

[0020] (1) The escalator starts, the handrail moves in a circular motion, the probe wheel rotates with the movement of the handrail and starts the collection system;

[0021] (2) The probe at the coupling tire part in contact with the handrail collects the temperature and magnetic flux of the handrail;

[0022] (3) The temperature and magnetic flux data are transmitted to the collector through the wireless transmission module, and the collector then transmits the data to the on-site monitoring terminal through the ultra-wideband wireless digital network;

[0023] (4) The on-site monitoring terminal compresses the data collected by all temperature detection devices and then transmits it to the remote monitoring terminal;

[0024] (5) After receiving the temperature and magnetic flux data, the remote monitoring terminal obtains the temperature state and the stress state of the handrail.

[0025] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0026] (1) The probe of the wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention is enclosed in a coupling tire. This enclosed structure is not easily affected by environmental factors and the measurement is more accurate.

[0027] (2) The wireless transmission coupled contact type escalator handrail temperature monitoring system of the present invention is directly coupled with the surface of the component, and the measurement is more realistic.

[0028] (3) The wireless transmission coupled contact escalator handrail temperature monitoring system of the present invention autonomously records the position of the detected point of the moving part through its own angle sensor, which is used for locating abnormal detection points and has an autonomous positioning function.

[0029] (4) The probe of the wireless transmission coupled contact escalator handrail temperature monitoring system of the present invention has a high transmission bandwidth and higher transmission data capacity and quality.

[0030] (5) The wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention is transmitted with the on-site monitoring terminal through an ultra-wideband wireless digital network, which can transmit massive amounts of data and realize wireless transmission.

[0031] (6) The probe of the wireless transmission coupled contact escalator handrail temperature monitoring system of the present invention is wirelessly charged, and the probe module is charged periodically and intermittently, which can avoid the situation of being out of power at the same time, thereby ensuring the reliability of the system and the continuity of monitoring.

[0032] (7) The wireless transmission coupled contact escalator handrail temperature monitoring system of the present invention is equipped with multiple probes, which has high redundancy and higher reliability.

[0033] (8) A detection wheel is installed at the inlet and outlet of the position where the handrail belt friction is serious. It can determine whether the position needs to be repaired and whether the escalator needs to be adjusted, providing reliable data support for the timely maintenance of the escalator and ensuring the safe operation of the escalator. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention when monitoring on an escalator;

[0035] Figure 2 is a front view of the wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention;

[0036] Figure 3 It is a side view of the wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention;

[0037] Figure 4 It is a schematic diagram of a wireless charging plate of the wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention.

[0038] Figure 5 It is a partial schematic diagram of the probe wheel of the wireless transmission coupling contact type escalator handrail temperature monitoring system of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Reference Figure 1 to Figure 5 , a wireless transmission coupled contact escalator handrail temperature monitoring system, used to detect the temperature and magnetic flux of the circulating handrail 3, including an on-site monitoring terminal, a remote monitoring terminal and a plurality of detection probe wheels, wherein:

[0041] For each of the probe wheels, each includes a mounting bracket 107, a wheel frame 106, an axle 105, a coupling tire 102, a probe 101, an angle sensor 104, an ambient temperature sensor 110 and a collector 103. The wheel frame 106 is mounted on the mounting bracket 107, and the axle 105 can be rotatably mounted on the wheel frame 106; the coupling tire 102 is mounted on the axle 105 to be pressed against the handrail 3 and driven to rotate by the handrail 3; the probe 101 is provided with a plurality of probes and they are evenly mounted on the inner circumference of the coupling tire 102; the angle sensor 104 is connected to the axle 105 to realize the positioning of the handrail 3 through the rotation of the coupling tire 102, and the angle sensor 104 is outside the probe wheel 1, and autonomously records the position of the detection point for positioning at the abnormal temperature rise. Among them, the detection point refers to the part of the handrail 3 detected by the probe 101. The angle sensor 104 is used to accurately locate the position of the detection point. The ambient temperature sensor 110 is installed on the wheel frame 106 to obtain the ambient temperature and transmit it to the collector 103 via wireless transmission.

[0042] For each of the probes 101, it includes a probe 101 base and a wireless transmission module and a magnetic flux and temperature sensor module installed together on the probe 101 base. The magnetic flux and temperature sensor module includes a magnetic flux sensor and a temperature sensor to respectively collect the magnetic flux and temperature of the handrail 3 and transmit them to the collector 103 through the wireless transmission module.

[0043] The collector transmits the temperature and magnetic flux data to the on-site monitoring terminal via wireless transmission, and the on-site monitoring terminal transmits the data to the remote monitoring terminal via a wireless network. The remote monitoring terminal compares the temperature of each part of the handrail 3 measured by the probe with the ambient temperature obtained by the ambient temperature sensor to obtain the temperature state of the handrail 3. In addition, the remote monitoring terminal obtains the stress state of the handrail 3 based on the magnetic flux of each part of the handrail 3 measured by the probe.

[0044] Furthermore, each of the probes 101 also includes a wireless charging module installed on the base of the probe 101. The three modules, namely the wireless charging module, the wireless transmission module and the magnetic flux and temperature sensor module, are integrated together to form an integrated body, so that the probe 101 becomes an integrated probe. When the coupling tire 102 of the probe wheel 1 contacts the surface of the handrail 3, the probe 101 can collect the temperature and magnetic flux of the detection point, and transmit the data to the collector 103 through the wireless broadband network.

[0045] The probe wheel 1 also includes a wireless charging plate 108, which has a power cord 109 to connect to a power source. The wireless charging plate 108 is installed on the mounting bracket 107, next to the wheel frame 106, to implement wireless charging for each probe 101, so that all probes 101 are charged alternately and periodically to avoid the situation of running out of power. The wireless charging plate 108 is parallel to the coupled tire 102, and a notch is set at the bottom of the wireless charging plate 108, and a charging coil is set in the notch.

[0046] Furthermore, the coupling tire 102 is made of a flexible sheet with good thermal radiation transmission performance, such as a flexible sheet made of graphene foam, so as to achieve coupling by close contact with the surface of the handrail 3. The probe 101 can be closer to the surface of the handrail 3 through the coupling tire 102.

[0047] Furthermore, the collector 103 transmits the temperature and magnetic flux data to the field monitoring terminal through an ultra-wideband wireless digital network, and the field monitoring terminal compresses all the magnetic flux and temperature data and transmits them to the remote monitoring terminal through a wireless network. The remote monitoring terminal analyzes the temperature of each part of the handrail 3 measured by the probe 101 and the ambient temperature obtained by the ambient temperature sensor 110 within a set time period, obtains the temperature difference between the temperature of each part of the handrail 3 and the ambient temperature, and then obtains the average value of the temperature difference, and then obtains the average deviation through the temperature of each part of the handrail 3 and the average value, and records the corresponding time period and each part of the handrail 3, so as to obtain the temperature state of the handrail 3, and then obtain the working conditions of the transmission device and the mechanical transmission mechanism driving the handrail 3, such as whether the transmission device and the handrail 3 are adjusted too tight, whether the brake is adjusted too tight, etc., so as to provide accurate state monitoring and data support for the operation of the mechanical transmission mechanism.

[0048] Furthermore, the collector 103 includes a wireless receiving module, a wireless transmitting module and a storage module. The wireless receiving module receives the temperature and magnetic flux data collected by each probe 101 through a wireless broadband network and transmits them to the storage module for storage. The wireless transmitting module transmits the temperature and magnetic flux data to the on-site monitoring terminal through the wireless broadband network.

[0049] Furthermore, the collector 103 is cylindrical and is coaxially mounted on the axle 105 , and can rotate along with the axle 105 , so as to facilitate better reception and transmission of temperature and magnetic flux data.

[0050] For the position on the handrail 3 where the friction is serious, a detection wheel is set at both ends of the position along the moving direction of the handrail 3. By directly comparing the temperature difference at both ends, the temperature change caused by the friction of the handrail 3 at the position is analyzed, so as to determine whether the position needs to be repaired and whether the position of the components in contact with the handrail 3 on the escalator needs to be adjusted. For example, along the moving direction of the handrail 3, the detection wheel 1 of the present invention is against the inner surface of the handrail 3 and is set at the belt inlet and belt outlet ends of the driving wheel 2 (refer to Figure 1 ), the belt inlet and outlet ends of the tension wheel, the belt inlet and outlet ends of the end rotary wheel, monitor the temperature of the handrail 3 under different working conditions, and install the on-site monitoring end on the escalator truss 4. The specific monitoring method includes the following steps:

[0051] (1) The escalator starts, the handrail belt 3 moves in a circular motion, the probe wheel 1 rotates with the movement of the handrail belt 3, and the collection system is started;

[0052] (2) The probe wheel 1 is coupled and in contact with the inner surface of the handrail belt 3, and the probe 101 at the coupling tire 102 in contact with the handrail belt 3 collects the temperature of the handrail belt 3 and the magnetic flux of the steel wire embedded in the handrail belt 3;

[0053] (3) The collected temperature and magnetic flux data are transmitted to the collector 103 through the wireless transmission module, and the collector 103 then transmits the data to the on-site monitoring terminal through the ultra-wideband wireless digital network;

[0054] (4) The on-site monitoring terminal compresses all data collected by the probe wheel 1 and then transmits it to the remote monitoring terminal;

[0055] (5) After receiving the monitoring data, the remote monitoring terminal analyzes the temperature and ambient temperature data of the handrail belt 3 collected by the probe wheel 1, obtains the difference between the temperature of the handrail belt 3 and the ambient temperature at the corresponding position, and calculates the average value of the difference within a certain time period, calculates the deviation, and records the corresponding time and position for the movement state analysis of the handrail belt 3.

[0056] (6) After receiving the monitoring data, the remote monitoring terminal analyzes the magnetic flux data of the steel wire embedded in the handrail 3 collected by the probe wheel 1, and uses the magnetoelastic effect to analyze the stress state of the handrail 3.

[0057] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Wireless transmission coupling contact escalator handrail temperature monitoring system, used to detect the temperature and magnetic flux of the circulating handrail, characterized in that: It includes on-site monitoring terminal, remote monitoring terminal and multiple detection probes, including: For each of the detection wheels, it includes a mounting bracket, a wheel frame, an axle, a coupling tire, a probe, an angle sensor, an ambient temperature sensor and a collector. The wheel frame is mounted on the mounting bracket, and the axle can be rotatably mounted on the wheel frame. The coupling tire is mounted on the axle to be used to rest against the handrail and be driven to rotate by the handrail. There are multiple probes and they are evenly mounted on the inner circumference of the coupling tire. The angle sensor is connected to the axle to position the handrail through the rotation of the coupling tire. The ambient temperature sensor is mounted on the wheel frame to obtain the ambient temperature and transmit it to the collector by wireless transmission. In addition, Each of the probes comprises a probe base, a wireless transmission module and a magnetic flux and temperature sensor module which are installed on the probe base. The magnetic flux and temperature sensor module comprises a magnetic flux sensor and a temperature sensor to respectively collect the magnetic flux and temperature of the handrail and transmit them to the collector through the wireless transmission module. The collector transmits the temperature and magnetic flux data to the on-site monitoring terminal via wireless transmission, and the on-site monitoring terminal transmits the data to the remote monitoring terminal via a wireless network. The remote monitoring terminal compares the temperature of each part of the handrail measured by the probe with the ambient temperature obtained by the ambient temperature sensor to obtain the temperature state of the handrail. In addition, the remote monitoring terminal obtains the stress state of the handrail based on the magnetic flux of each part of the handrail measured by the probe.

2. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: Each of the probes also includes a wireless charging module mounted on the probe base; The probe wheel also includes a wireless charging plate, which is installed on the mounting bracket to implement wireless charging for each probe, so that all the probes are charged alternately and periodically to avoid the situation of running out of power.

3. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 2 is characterized in that: The wireless charging plate is parallel to the coupled tire, a notch is arranged at the bottom of the wireless charging plate, and a charging coil is arranged in the notch.

4. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: The coupling tire adopts a flexible sheet made of graphene foam to achieve coupling by closely contacting with the surface of the handrail.

5. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: The collector transmits the temperature and magnetic flux data to the field monitoring terminal through an ultra-wideband wireless digital network, and the field monitoring terminal compresses all the magnetic flux and temperature data and transmits them to the remote monitoring terminal through a wireless network.

6. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: The remote monitoring terminal analyzes the temperature of each part of the handrail measured by the probe and the ambient temperature obtained by the ambient temperature sensor within a set time period, obtains the temperature difference between the temperature of each part of the handrail and the ambient temperature, and then obtains the average value of the temperature difference, and then obtains the average deviation through the temperature of each part of the handrail and the average value, and records the corresponding time period and each part of the handrail to obtain the temperature status of the handrail.

7. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: The collector includes a wireless receiving module, a wireless transmitting module and a storage module. The wireless receiving module receives the temperature and magnetic flux data collected by each probe through a wireless broadband network and transmits them to the storage module for storage. The wireless transmitting module transmits the temperature and magnetic flux data to the on-site monitoring terminal through the wireless broadband network.

8. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: The collector is cylindrical and is coaxially mounted on the wheel axle.

9. The wireless transmission coupling contact type escalator handrail temperature monitoring system according to claim 1 is characterized in that: For the position on the handrail where the friction is serious, a detection wheel is set at both ends of the position along the moving direction of the handrail. By directly comparing the temperature difference at the two ends, the temperature change caused by the friction of the handrail at this position is analyzed, so as to judge whether the position needs to be inspected and whether the position of the components in contact with the handrail on the escalator needs to be adjusted.

10. The monitoring method of the wireless transmission coupling contact type escalator handrail temperature monitoring system according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) The escalator starts, the handrail moves in a circular motion, the probe wheel rotates with the movement of the handrail and starts the collection system; (2) The probe at the coupling tire part in contact with the handrail collects the temperature and magnetic flux of the handrail; (3) The temperature and magnetic flux data are transmitted to the collector through the wireless transmission module, and the collector then transmits the data to the on-site monitoring terminal through the ultra-wideband wireless digital network; (4) The on-site monitoring terminal compresses the data collected by all temperature detection devices and then transmits it to the remote monitoring terminal; (5) After receiving the temperature and magnetic flux data, the remote monitoring terminal obtains the temperature state and the stress state of the handrail.

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