Energy-saving escalator based on permanent magnet synchronous motor driving and control method

Abstract

The invention discloses an energy-saving escalator based on permanent magnet synchronous motor driving and a control method.The energy-saving escalator comprises an escalator way module, a handrail module, a driving module, a control module and a monitoring module, the escalator way module comprises stairs and stair guide rails, and the handrail module comprises handrail belts and handrail belt guide rails; the driving module is used for driving the stairs and the handrail belt to move in the same direction, the control module is used for controlling the overall operation of the escalator, and the monitoring module is used for monitoring the operation state of the escalator. Different escalator stopping modes are started according to the output result of the riding condition detection unit, if people exist in the escalator, the escalator starts the slow stopping mode, the situation that people in sudden stopping of the escalator fall down easily is reduced, and if no people exist in the escalator, the escalator starts the sudden stopping mode; therefore, the escalator can realize different stopping modes for the abnormal speed of the hand strap according to the specific condition that whether pedestrians exist on the escalator or not, and the safety of people who need to stop the escalator under the abnormal condition of the hand strap is protected to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of escalators, and in particular to an energy-saving escalator driven by a permanent magnet synchronous motor, a control method and a use method thereof. Background Art

[0002] An escalator is a fixed electric-driven device with circular running steps for transporting pedestrians up or down. It is widely used in shopping malls, supermarkets, airports, subways and other places, making people's travel more convenient. Many new escalators on the market have energy-saving modes, which automatically reduce the escalator's running speed when the escalator senses that no one is riding, thereby saving energy.

[0003] According to relevant national regulations on escalators, if the handrail speed deviates from the step speed by more than -15% and lasts for more than 15 seconds, the escalator will stop running. When encountering such an abnormal situation, the escalator in the existing technology will directly make an emergency stop. However, if there are pedestrians on the escalator when the emergency stop occurs, the pedestrians may fall easily due to inertia.

[0004] The defects of existing energy-saving escalators are: 1. Patent document CN108217411B discloses a method for controlling the running speed of an escalator and an escalator. However, the escalator in the patent document does not consider the specific situation that no one is on the escalator when the running speed of the handrail is abnormal to select the stop mode; 2. Patent document CN107043065A discloses an anti-congestion escalator and a control method thereof. However, the escalator in the patent document does not consider setting a sensor at the outermost part of the transition pedal of the escalator to sense the entry of pedestrians. As a result, during the operation of the escalator, it is possible that pedestrians have stepped on the pedals, but the escalator still accelerates to the normal operating speed at the set acceleration. At this time, pedestrians are prone to fall due to the speed change of the escalator. 3. Application document CN112919294A proposes an escalator control method, system and escalator system. However, the escalator in the patent document does not consider setting a pressure threshold and a pressure change threshold at the same time to accurately judge the escalator climbing behavior of passengers, nor does it consider performing different operations according to different pressure conditions of the handrail belt; 4. The escalator in the prior art does not consider sending an abnormal handrail speed alarm signal to the escalator management and maintenance personnel and the management personnel in the escalator workplace when the handrail running speed is detected to be slower than the actual step running speed. Summary of the invention

[0005] The object of the present invention is to provide an energy-saving escalator driven by a permanent magnet synchronous motor and a control method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an energy-saving automatic escalator driven by a permanent magnet synchronous motor and a control method thereof, comprising a ladder path module, a handrail module, a drive module, a control module and a monitoring module, wherein the ladder path module comprises steps and step guide rails, the handrail module comprises a handrail belt and a handrail belt guide rail, the drive module is used to drive the steps and the handrail belt to move in the same direction, the control module is used to control the overall operation of the escalator, and the monitoring module is used to monitor the operating status of the escalator; The control module includes an energy-saving speed regulation unit, an alarm unit and an abnormal stop unit. The energy-saving speed regulation mode dynamically adjusts the escalator running speed according to the actual passenger flow. The alarm unit is used to issue an alarm message. The stop control mode of the abnormal stop unit includes an emergency stop mode and a slow stop mode. The emergency stop mode controls the escalator to stop running immediately, and the slow stop mode controls the escalator to decelerate according to the set acceleration until the steps stop running. The monitoring module includes a riding condition monitoring unit, a handrail step speed measuring unit and a handrail pressure monitoring unit. The riding condition monitoring unit is used to monitor passengers on the escalator. The handrail step speed measuring unit is used to monitor the running speed of the escalator handrail and the actual running speed of the steps in real time. The handrail pressure monitoring unit is used to monitor the pressure borne by the handrail. The monitoring results of the monitoring module are sent to the control module. The handrail step speed measuring unit detects that the handrail speed is lower than the corresponding elevator speed by 15% and lasts for 10 seconds, and then sends an abnormal handrail speed signal to the control module. The control module activates different stop modes of the abnormal stop unit according to the monitoring results of the riding condition monitoring unit.

[0007] Preferably, the riding condition monitoring unit monitors whether there is anyone riding the escalator; When no one is riding the escalator and the handrail step speed measuring unit sends a handrail abnormality signal to the control module, the control module activates the emergency stop mode; When there is someone riding on the escalator and the handrail step speed measuring unit sends a handrail abnormality signal to the control module, the control module activates the slow stop mode.

[0008] Preferably, the escalator operation mode adjusted by the energy-saving speed regulation mode includes an energy-saving low-speed operation mode and a normal operation mode; When the riding situation monitoring unit detects that no one has entered the escalator for 10 seconds, the monitoring module sends a no-rider signal to the control module, and the energy-saving speed regulation mode controls the escalator from the normal operation mode to the energy-saving low-speed operation mode; When the escalator is in the energy-saving low-speed operation mode, when the riding situation monitoring unit detects that someone enters the escalator range, the energy-saving speed regulation mode controls the escalator from the energy-saving low-speed operation mode to the normal operation mode.

[0009] Preferably, the energy-saving escalator also includes a transition pedal, the transition includes a front plate, a middle plate and a rear plate, and the riding condition monitoring unit monitors whether there are pedestrians on the escalator or whether someone enters the escalator by setting a gravity sensor on the escalator cover plate and symmetrically setting photoelectric sensors or infrared sensors at the entrance and exit of the escalator.

[0010] Preferably, the handrail and step speed measuring unit monitors the actual running speed deviation of the handrail and the steps through an escalator synchronization rate tester or an escalator speed deviation detector.

[0011] Preferably, if the handrail step speed measuring unit detects that the handrail running speed is slower than the actual step running speed, it sends a handrail speed abnormality alarm signal to the alarm unit of the control module. When the alarm unit receives the handrail speed abnormality alarm signal, the alarm unit sends the handrail speed abnormality in the form of a pop-up window to the mobile terminal of the escalator management and maintenance personnel and the management personnel in the escalator workplace via wireless communication.

[0012] Preferably, the output information of the riding condition monitoring unit determines the start and stop of the handrail pressure monitoring unit. When the riding condition monitoring unit detects that someone is riding the escalator, the handrail pressure monitoring unit starts to operate. When the handrail pressure monitoring unit starts to operate, it will measure the pressure values ​​at various locations on the handrail in real time and obtain the pressure change value per unit time. When the riding situation monitoring unit detects that no one is riding the escalator, the handrail pressure detection unit stops running.

[0013] Preferably, if the handrail pressure monitoring unit detects that a part of the handrail is under pressure and the pressure value is greater than a set pressure threshold, the handrail pressure monitoring unit sends an abnormal handrail pressure alarm signal to the control module, and the alarm unit of the control module controls the escalator to issue a voice prompt message; If the handrail pressure monitoring unit detects that part of the handrail is under pressure and the pressure value is greater than the set pressure threshold, and the instantaneous pressure change value exceeds the set instantaneous pressure change threshold, it sends a stop signal to the control module, and the abnormal stop unit of the control module controls the escalator to enter the emergency stop mode.

[0014] Preferably, the drive module includes a permanent magnet synchronous drive motor and a reduction mechanism. The permanent magnet synchronous drive motor provides power, and the high-speed rotation of the motor is decelerated through the reduction mechanism and converted into the running speed required for the escalator steps and handrails. The drive module provides driving force for the ladder path module and the handrail module, and the control module controls the operation of the drive module to realize the operation of the escalator.

[0015] Preferably, a control method for an energy-saving escalator driven by a permanent magnet synchronous motor is as follows: S1. The energy-saving escalator drives the ladder path module and the handrail module through the driving module to make the escalator operate normally; S2. The monitoring module monitors the running status of the escalator in real time. The riding status monitoring unit monitors whether there are pedestrians riding the escalator. The handrail and step speed measuring unit monitors the running speed and speed deviation of the handrail and steps. The handrail pressure monitoring unit monitors the pressure of the handrail in real time. S3, the riding situation monitoring unit outputs the escalator occupancy status to the control module, the handrail step speed measuring unit sends a signal to the control module when it detects that the handrail speed is abnormal, and the handrail step speed measuring unit sends a signal to the control module when it detects that the pressure on the handrail is abnormal; S4. The control module performs different operations according to the signal of the monitoring module. The control module switches the escalator between the energy-saving speed regulation mode and the normal operation mode according to the monitoring result of the riding condition monitoring unit. The control module enables different stop modes according to the monitoring result of the riding condition monitoring unit and the handrail speed abnormality signal of the handrail step speed measuring unit. The control module controls the alarm unit to send a pop-up window of handrail abnormality according to the handrail speed abnormality alarm signal of the handrail step speed measuring unit. The control module controls the escalator to issue a voice prompt message or control the escalator to start the emergency stop mode according to the signal of the handrail pressure monitoring unit.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the escalator of the present invention handles the situation that the handrail speed is lower than 15% of the corresponding elevator speed and lasts for 10 seconds, the elevator emergency stop mode will not be activated immediately, but different stop modes will be activated according to the output result of the riding condition detection unit. If there are people on the escalator, the escalator will start the slow stop mode to reduce the situation that people are prone to fall due to inertia when the escalator stops suddenly. If there are no people on the escalator, the escalator will start the emergency stop mode. This allows the escalator to implement different stop modes for abnormal handrail speed according to the specific situation of whether there are pedestrians on the escalator, thereby maximizing the protection of the safety of passengers in such abnormal situations.

[0017] 2. The present invention can accurately judge whether there are people riding the escalator through the riding situation monitoring unit in the monitoring module, and monitor the pedestrians entering the escalator through the rear plate in the transition pedal, so that the escalator can monitor the pedestrians entering the escalator earlier than ordinary escalators. Therefore, the escalator changes from the original energy-saving low-speed operation mode to the normal operation state earlier, thereby avoiding to a certain extent the situation that the pedestrian has stepped on the pedal, but the escalator is still accelerating to the normal operating speed at the set acceleration, reducing the situation that pedestrians are prone to falling because the escalator is still accelerating.

[0018] 3. The present invention determines whether any passenger is climbing the handrail by real-time monitoring of the handrail pressure, and sets a pressure threshold and an instantaneous pressure change threshold respectively, so as to reduce the misjudgment of handrail climbing. At the same time, the present invention also reminds passengers or stops the escalator according to different handrail pressure conditions. The handrail pressure monitoring unit of the present invention not only improves the safety of escalator riding, so that the energy-saving escalator can judge whether a passenger is climbing the handrail and make an emergency stop by monitoring the handrail pressure, but also improves the accuracy of the energy-saving escalator's judgment on passengers climbing the handrail, and sends a reminder when the pressure on the handrail exceeds the threshold, so as to reduce the situation of passengers climbing the escalator handrail.

[0019] 4. When the handrail step speed measuring unit of the present invention detects that the handrail running speed is slower than the actual step running speed, it sends a handrail speed abnormality alarm signal to the control module. The alarm unit of the control module sends a handrail speed abnormality pop-up window to the mobile terminals of the escalator management and maintenance personnel and the management personnel in the escalator workplace. The sending of the handrail speed abnormality reminder pop-up window can quickly remind the management and maintenance personnel in the escalator workplace, so that the management and maintenance personnel can quickly understand the specific operating conditions of the current escalator, so that the management and maintenance personnel can judge whether the escalator needs to be repaired according to the specific situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the escalator of the present invention; Figure 2 It is a schematic diagram of the structure of the control module of the present invention; Figure 3 It is a schematic diagram of the structure of the monitoring module of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 and Figure 2, an embodiment provided by the present invention: an energy-saving escalator driven by a permanent magnet synchronous motor, comprising a ladder path module, a handrail module, a drive module, a control module and a monitoring module, wherein the ladder path module comprises steps and step guide rails, the handrail module comprises a handrail belt and a handrail belt guide rail, the drive module is used to drive the steps and the handrail belt to move in the same direction, the control module is used to control the overall operation of the escalator, and the monitoring module is used to monitor the operating status of the escalator; The control module includes an energy-saving speed regulation unit, an alarm unit and an abnormal stop unit. The energy-saving speed regulation mode dynamically adjusts the escalator running speed according to the actual passenger flow. The alarm unit is used to issue an alarm message. The stop control mode of the abnormal stop unit includes an emergency stop mode and a slow stop mode. The emergency stop mode controls the escalator to stop running immediately, and the slow stop mode controls the escalator to decelerate according to the set acceleration until the steps stop running. The monitoring module includes a riding condition monitoring unit, a handrail step speed measuring unit and a handrail pressure monitoring unit. The riding condition detection unit The unit is used to monitor the passengers on the escalator, the handrail step speed measuring unit is used to monitor the running speed of the elevator handrail and the actual running speed of the steps in real time, the handrail pressure monitoring unit is used to monitor the pressure borne by the handrail, and the monitoring result of the monitoring module is sent to the control module; the handrail step speed measuring unit detects that the handrail speed is lower than 15% of the corresponding escalator speed and continues for 10 seconds, and then sends an abnormal handrail speed signal to the control module, and the control module activates different stop modes of the abnormal stop unit according to the monitoring result of the riding condition monitoring unit.

[0023] The riding condition monitoring unit monitors whether there is anyone riding the escalator; When no one is riding the escalator and the handrail step speed measuring unit sends a handrail abnormality signal to the control module, the control module activates the emergency stop mode; When there is someone riding on the escalator and the handrail step speed measuring unit sends a handrail abnormality signal to the control module, the control module activates the slow stop mode.

[0024] Furthermore, the step module of the energy-saving escalator is connected together by a series of chains or belts to form a closed circulation system. Under the driving action of the driving module, the steps continue to circulate along the step guide rails. When each step rises or descends to a certain position, it will be smoothly spread out or folded through a special mechanical structure to ensure the safety of passengers getting on and off; the handrail belt of the handrail module is usually made of rubber or other synthetic materials, and the surface is covered with a gripping texture to provide passengers with a better grip and safety; the step guide rails and the handrail guide rails are parallel, the driving module drives the step chain to operate, and the step chain drives the step guide rails layer by layer to operate, forming a closed motion loop; the control module of the energy-saving escalator of the present invention can adjust the escalator operation state according to actual needs.

[0025] According to national standards, the tolerance of the handrail's running speed relative to the actual speed of the steps, pedals or belts is 0% to +2%. If the handrail speed deviates from the step speed by more than -15% and lasts for more than 15 seconds, the escalator will stop running. For the present invention, when the handrail step speed measuring unit of the monitoring module detects that the handrail speed is lower than 15% of the corresponding escalator speed and lasts for 10 seconds, the handrail step speed measuring unit sends a handrail abnormality signal to the control module, and the control module continuously receives the output information of the riding condition detection unit of the monitoring module. If the control module receives the handrail abnormality signal sent by the handrail step speed measuring unit, and the output information of the riding condition monitoring unit received by the control module is that there is no one on the escalator at present, the control module starts the emergency stop mode and controls the drive module to stop the escalator immediately; if the control module receives the handrail abnormality signal sent by the handrail step speed measuring unit, and the output information of the riding condition monitoring unit received by the control module is that there is someone on the escalator at present, the control module starts the slow stop mode and controls the drive module to decelerate the escalator according to the set acceleration until the steps stop running.

[0026] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: an energy-saving automatic escalator driven by a permanent magnet synchronous motor, wherein the escalator operation mode adjusted by the energy-saving speed regulation mode includes an energy-saving low-speed operation mode and a normal operation mode; When the riding situation monitoring unit detects that no one has entered the escalator for 10 seconds, the monitoring module sends a no-rider signal to the control module, and the energy-saving speed regulation mode controls the escalator from the normal operation mode to the energy-saving low-speed operation mode; When the escalator is in the energy-saving low-speed operation mode, when the riding situation monitoring unit detects that someone enters the escalator range, the energy-saving speed regulation mode controls the escalator from the energy-saving low-speed operation mode to the normal operation mode; The energy-saving escalator also includes a transition pedal, which includes a front plate, a middle plate and a rear plate. The riding condition monitoring unit monitors whether there are pedestrians on the escalator or whether someone enters the escalator by setting a gravity sensor on the escalator cover and symmetrically setting photoelectric sensors or infrared sensors at the entrance and exit of the escalator.

[0027] Furthermore, when the energy-saving escalator of the present invention is put into use and operates normally, if the riding condition monitoring unit detects that no one has entered the escalator for 10 seconds, the monitoring module sends a no-riding signal to the control module, and the energy-saving speed regulation mode of the control module controls the driving module to make the escalator enter the energy-saving low-speed operation mode from the normal operation mode; when the escalator is in the energy-saving low-speed operation mode, when the riding condition monitoring unit detects that someone has entered the escalator range, the riding condition monitoring unit monitors and sends a pedestrian riding signal to the control module, and the energy-saving speed regulation mode of the control module controls the escalator to enter the normal operation mode from the energy-saving low-speed operation mode; Specifically, when a person enters the escalator, he / she will first pass through the rear plate of the transition pedal. After the gravity sensor on the rear plate senses the gravity of the pedestrian, it will send a pedestrian riding signal to the control module. The control signal controls the driving module to work, so that the escalator in the original energy-saving low-speed operation mode completes acceleration according to the preset acceleration, so that when the pedestrian reaches the comb plate of the escalator, the escalator's operating speed has reached the normal operating speed, that is, when the pedestrian steps on the escalator steps, the escalator has been transformed into a normal operating state; by adjusting the operating state of the escalator according to actual needs, the escalator can be operated at a low speed when no one is riding, and it is not necessary to maintain the normal operating speed all the time, thereby achieving energy conservation and emission reduction; at the same time, the present invention realizes the monitoring of pedestrians entering the escalator through the rear plate in the transition pedal of the escalator, which is earlier than the monitoring of pedestrians entering the escalator by ordinary escalators, so the time for the escalator to change from the original energy-saving low-speed operation mode to the normal operating state is earlier, so it can avoid to a certain extent the situation that the pedestrian has stepped on the pedal, but the escalator is still accelerated to the normal operating speed at the set acceleration, thereby reducing the situation that pedestrians are prone to fall due to the escalator still accelerating; At the same time, photoelectric sensors or infrared sensors are also installed at the entrance and exit of the escalator. The photoelectric sensors or infrared sensors at the entrance can work together with the gravity sensor on the rear plate of the transition pedal to sense pedestrians entering the escalator, and the sensors at the exit can monitor pedestrians leaving the escalator.

[0028] See also Figure 1 , Figure 2 and Figure 3 An embodiment of the present invention is: an energy-saving escalator driven by a permanent magnet synchronous motor, wherein a handrail step speed measuring unit monitors the actual running speed deviation of the handrail and the steps through an escalator synchronization rate tester or an escalator speed deviation detector; if the handrail step speed measuring unit detects that the running speed of the handrail is slower than the actual running speed of the steps, an abnormal handrail speed alarm signal is sent to an alarm unit of a control module; when the alarm unit receives the abnormal handrail speed alarm signal, the alarm unit sends the abnormal handrail speed condition in the form of a pop-up window to the mobile terminals of escalator management and maintenance personnel and managers in the escalator workplace through wireless communication.

[0029] Furthermore, when the escalator is running, the handrail and step speed measuring unit of the monitoring module measures the running speed of the handrail and steps in real time, and obtains the deviation of the actual running speed of the escalator and handrail through the escalator synchronization rate tester or escalator speed deviation detector; When the handrail step speed measuring unit detects that the handrail speed is slower than the actual step speed, the handrail step speed measuring unit will send a handrail speed abnormality alarm signal to the control module. The alarm unit of the control module will send the handrail speed abnormality to the mobile terminals of the escalator management and maintenance personnel and the management personnel in the escalator workplace. The alarm pop-up window content includes the currently monitored handrail running speed, step running speed and the deviation between the handrail speed and step running speed. The pop-up window of handrail speed abnormality reminder can remind the management and maintenance personnel in the escalator workplace, so that the management and maintenance personnel can quickly understand the specific operating conditions of the current escalator, so that the management and maintenance personnel can judge whether the escalator needs to be repaired according to the specific situation.

[0030] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: an energy-saving escalator driven by a permanent magnet synchronous motor, the output information of the riding condition monitoring unit determines the start and stop of the handrail pressure monitoring unit, when the riding condition monitoring unit detects that there are people riding on the escalator, the handrail pressure monitoring unit starts to run, and when the handrail pressure monitoring unit starts to run, it will measure the pressure values ​​of various places on the handrail in real time and obtain the pressure change value per unit time; when the riding condition monitoring unit detects that no one is riding on the escalator, the handrail pressure detection unit stops running; if the handrail pressure monitoring unit detects that part of the handrail is under pressure, and the pressure value is greater than the set pressure threshold, the handrail pressure monitoring unit sends an abnormal handrail pressure alarm signal to the control module, and the alarm unit of the control module controls the escalator to send a voice prompt message; If the handrail pressure monitoring unit detects that part of the handrail is under pressure and the pressure value is greater than the set pressure threshold, and the instantaneous pressure change value exceeds the set instantaneous pressure change threshold, it sends a stop signal to the control module, and the abnormal stop unit of the control module controls the escalator to enter the emergency stop mode.

[0031] Furthermore, the result of the riding condition monitoring unit monitoring whether there are passengers on the escalator determines the operation and shutdown of the handrail pressure monitoring unit. When the riding condition monitoring unit detects that there are passengers on the escalator, the handrail pressure monitoring unit starts, and when the riding condition monitoring unit detects that there are no passengers on the escalator, the handrail pressure detection unit stops running; the running handrail pressure monitoring unit measures the pressure values ​​at various locations on the handrail in real time and obtains the pressure change value per unit time; When the handrail pressure monitoring unit detects that part of the handrail has been subjected to pressure, if the pressure value is greater than the set pressure threshold, the handrail pressure monitoring unit sends an abnormal handrail pressure alarm signal to the control module, and the alarm unit of the control module controls the escalator to issue a voice prompt message, which is used to remind passengers to stand firmly and hold on, and not to climb the escalator handrail; When the handrail pressure monitoring unit has detected that part of the handrail is under pressure, if the monitored pressure value is greater than the set pressure threshold and the instantaneous pressure change value exceeds the set instantaneous pressure change threshold, it can be determined that someone is currently climbing the handrail of the escalator. The handrail pressure monitoring unit sends a stop signal to the control module, and the abnormal stop unit of the control module controls the escalator to start the emergency stop mode, so that the escalator stops running immediately. Through real-time monitoring of the handrail pressure and setting the pressure threshold and the instantaneous pressure change threshold respectively, the escalator can quickly handle the behavior of climbing the handrail, which not only improves the safety of escalator riding, enables the energy-saving automatic escalator to determine that a passenger is climbing the handrail and causing the escalator to stop urgently through the monitoring of the handrail pressure, but also improves the accuracy of the energy-saving automatic escalator in judging whether a passenger is climbing the handrail.

[0032] See also Figure 1 An embodiment of the present invention is: an energy-saving escalator driven by a permanent magnet synchronous motor, wherein a driving module includes a permanent magnet synchronous driving motor and a reduction mechanism, wherein the permanent magnet synchronous driving motor provides power, and the high-speed rotation of the motor is reduced by the reduction mechanism and converted into the running speed required for the escalator steps and handrails, the driving module provides driving force for the ladder path module and the handrail module, and the control module controls the operation of the driving module to realize the operation of the escalator.

[0033] Furthermore, the permanent magnet synchronous motor of the drive module has the characteristics of high efficiency and high power factor. Compared with the traditional asynchronous motor, it can significantly reduce energy consumption, so the energy saving of the energy-saving escalator can be further improved. The escalator can change the running speed of the escalator through the frequency converter. The frequency converter controls the motor speed by changing the power supply frequency of the permanent magnet synchronous motor, thereby changing the running speed of the escalator. The permanent magnet synchronous drive motor provides driving force, and the reduction mechanism reduces the high-speed rotation of the motor and converts it into the running speed required for the escalator steps and handrails. In this process, the smooth conversion ability of the reduction mechanism directly affects the smoothness of the escalator operation. Specifically, the working process of the driver module is as follows: The permanent magnet synchronous drive motor drives and transmits power to the main drive shaft through the reducer. The main drive shaft is equipped with a step sprocket, which drives the step chain to move through the chain. The step chain is equipped with multiple steps. The movement of the step chain drives the steps to circulate along the step guide rail. The operation of handrails and steps is usually driven by different motors and mechanical components, which are interconnected by precise gear ratios and chain transmission devices, so that the speed of the handrails and steps can be adjusted independently; similarly, the driving process of the handrails is also driven by a permanent magnet synchronous drive motor that transmits power to the main drive shaft through a reducer. The main drive shaft is equipped with a handrail drive sprocket, which drives the handrail drive wheel through a chain. The handrail drive wheel uses the friction between the handrail and the handrail to make the handrail run at a speed synchronized with the steps.

[0034] Furthermore, a control method for an energy-saving escalator driven by a permanent magnet synchronous motor is as follows: S1. The energy-saving escalator drives the ladder path module and the handrail module through the driving module to make the escalator operate normally; S2. The monitoring module monitors the running status of the escalator in real time. The riding status monitoring unit monitors whether there are pedestrians riding the escalator. The handrail and step speed measuring unit monitors the running speed and speed deviation of the handrail and steps. The handrail pressure monitoring unit monitors the pressure of the handrail in real time. S3, the riding situation monitoring unit outputs the escalator occupancy status to the control module, the handrail step speed measuring unit sends a signal to the control module when it detects that the handrail speed is abnormal, and the handrail step speed measuring unit sends a signal to the control module when it detects that the pressure on the handrail is abnormal; S4. The control module performs different operations according to the signal of the monitoring module. The control module switches the escalator between the energy-saving speed regulation mode and the normal operation mode according to the monitoring result of the riding condition monitoring unit. The control module enables different stop modes according to the monitoring result of the riding condition monitoring unit and the handrail speed abnormality signal of the handrail step speed measuring unit. The control module controls the alarm unit to send a pop-up window of handrail abnormality according to the handrail speed abnormality alarm signal of the handrail step speed measuring unit. The control module controls the escalator to issue a voice prompt message or control the escalator to start the emergency stop mode according to the signal of the handrail pressure monitoring unit.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An energy-saving escalator driven by a permanent magnet synchronous motor, comprising a ladder path module, a handrail module, a drive module, a control module and a monitoring module, characterized in that: The ladder module includes steps and step guide rails, the handrail module includes handrail belts and handrail belt guide rails, the driving module is used to drive the steps and handrail belts to move in the same direction, the control module is used to control the overall operation of the escalator, and the monitoring module is used to monitor the operating status of the escalator; The control module includes an energy-saving speed regulation unit, an alarm unit and an abnormal stop unit. The energy-saving speed regulation mode dynamically adjusts the escalator running speed according to the actual passenger flow. The alarm unit is used to issue an alarm message. The stop control mode of the abnormal stop unit includes an emergency stop mode and a slow stop mode. The emergency stop mode controls the escalator to stop running immediately, and the slow stop mode controls the escalator to decelerate according to the set acceleration until the steps stop running. The monitoring module includes a riding condition monitoring unit, a handrail step speed measuring unit and a handrail pressure monitoring unit. The riding condition monitoring unit is used to monitor passengers on the escalator. The handrail step speed measuring unit is used to monitor the running speed of the escalator handrail and the actual running speed of the steps in real time. The handrail pressure monitoring unit is used to monitor the pressure borne by the handrail. The monitoring results of the monitoring module are sent to the control module. The handrail step speed measuring unit detects that the handrail speed is lower than the corresponding elevator speed by 15% and lasts for 10 seconds, and then sends an abnormal handrail speed signal to the control module. The control module activates different stop modes of the abnormal stop unit according to the monitoring results of the riding condition monitoring unit.

2. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1 is characterized in that: The riding condition monitoring unit monitors whether there is anyone riding the escalator; When no one is riding the escalator and the handrail step speed measuring unit sends a handrail abnormality signal to the control module, the control module activates the emergency stop mode; When there is someone riding on the escalator and the handrail step speed measuring unit sends a handrail abnormality signal to the control module, the control module activates the slow stop mode.

3. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The escalator operation mode adjusted by the energy-saving speed regulation mode includes an energy-saving low-speed operation mode and a normal operation mode; When the riding situation monitoring unit detects that no one has entered the escalator for 10 seconds, the monitoring module sends a no-rider signal to the control module, and the energy-saving speed regulation mode controls the escalator from the normal operation mode to the energy-saving low-speed operation mode; When the escalator is in the energy-saving low-speed operation mode, when the riding situation monitoring unit detects that someone enters the escalator range, the energy-saving speed regulation mode controls the escalator from the energy-saving low-speed operation mode to the normal operation mode.

4. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The energy-saving escalator also includes a transition pedal, which includes a front plate, a middle plate and a rear plate. The riding condition monitoring unit monitors whether there are pedestrians on the escalator or whether someone enters the escalator by arranging a gravity sensor on the escalator cover plate and symmetrically arranging photoelectric sensors or infrared sensors at the entrance and exit of the escalator.

5. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The handrail and step speed measuring unit monitors the actual running speed deviation of the handrail and the steps through an escalator synchronization rate tester or an escalator speed deviation detector.

6. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1, characterized in that: If the handrail step speed measuring unit detects that the handrail speed is slower than the actual step speed, it sends a handrail speed abnormality alarm signal to the alarm unit of the control module. When the alarm unit receives the handrail speed abnormality alarm signal, the alarm unit sends the handrail speed abnormality in the form of a pop-up window to the mobile terminals of the escalator management and maintenance personnel and the managers in the escalator workplace via wireless communication.

7. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The output information of the riding condition monitoring unit determines the start and stop of the handrail pressure monitoring unit. When the riding condition monitoring unit detects that someone is riding the escalator, the handrail pressure monitoring unit starts to operate. When the handrail pressure monitoring unit starts to operate, it will measure the pressure values ​​at various locations on the handrail in real time and obtain the pressure change value per unit time; When the riding situation monitoring unit detects that no one is riding the escalator, the handrail pressure detection unit stops running.

8. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 7, characterized in that: If the handrail pressure monitoring unit detects that a part of the handrail is under pressure and the pressure value is greater than the set pressure threshold, the handrail pressure monitoring unit sends an abnormal handrail pressure alarm signal to the control module, and the alarm unit of the control module controls the escalator to issue a voice prompt message; If the handrail pressure monitoring unit detects that part of the handrail is under pressure and the pressure value is greater than the set pressure threshold, and the instantaneous pressure change value exceeds the set instantaneous pressure change threshold, it sends a stop signal to the control module, and the abnormal stop unit of the control module controls the escalator to enter the emergency stop mode.

9. The energy-saving escalator driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The drive module includes a permanent magnet synchronous drive motor and a reduction mechanism. The permanent magnet synchronous drive motor provides power, and the high-speed rotation of the motor is reduced by the reduction mechanism and converted into the running speed required for the escalator steps and handrails. The drive module provides driving force for the ladder path module and the handrail module, and the control module controls the operation of the drive module to realize the operation of the escalator.

10. A control method for an energy-saving escalator driven by a permanent magnet synchronous motor, according to any one of claims 1 to 9, characterized in that: The control method of the energy-saving escalator is as follows: S1. The energy-saving escalator drives the ladder path module and the handrail module through the driving module to make the escalator operate normally; S2. The monitoring module monitors the running status of the escalator in real time. The riding status monitoring unit monitors whether there are pedestrians riding the escalator. The handrail and step speed measuring unit monitors the running speed and speed deviation of the handrail and steps. The handrail pressure monitoring unit monitors the pressure of the handrail in real time. S3, the riding situation monitoring unit outputs the escalator occupancy status to the control module, the handrail step speed measuring unit sends a signal to the control module when it detects that the handrail speed is abnormal, and the handrail step speed measuring unit sends a signal to the control module when it detects that the pressure on the handrail is abnormal; S4. The control module performs different operations according to the signal of the monitoring module. The control module switches the escalator between the energy-saving speed regulation mode and the normal operation mode according to the monitoring result of the riding condition monitoring unit. The control module enables different stop modes according to the monitoring result of the riding condition monitoring unit and the handrail speed abnormality signal of the handrail step speed measuring unit. The control module controls the alarm unit to send a pop-up window of handrail abnormality according to the handrail speed abnormality alarm signal of the handrail step speed measuring unit. The control module controls the escalator to issue a voice prompt message or control the escalator to start the emergency stop mode according to the signal of the handrail pressure monitoring unit.

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