Escalator adaptive braking system and method

Abstract

The application discloses a kind of escalator adaptive braking systems, methods.The system of the application includes controller, frequency converter, escalator motor;Controller is equipped with detection calculation module, deceleration preset module;Controller is electrically connected with frequency converter, escalator motor respectively;Escalator motor is electrically connected with frequency converter;Detection calculation module is connected with deceleration preset module;Frequency converter is used to speed regulation to escalator motor;Deceleration preset module is used to set the instantaneous deceleration expected curve of escalator in deceleration process, the expected braking torque of escalator motor;Detection calculation module is used to calculate the real-time load torque of escalator motor and the instantaneous deceleration change condition of corresponding moment of escalator under the working condition of deceleration stop escalator, then controller controls frequency converter to adjust the output torque of escalator motor according to real-time change condition, so that subsequent instantaneous deceleration of escalator agrees with instantaneous deceleration expected curve.The application can adjust the instantaneous deceleration of escalator under full load and no load.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of escalator equipment, and particularly relates to an escalator adaptive braking system and method. BACKGROUND

[0002] Escalators are typical equipment for transporting passengers in public places. Because the efficiency of escalators in transporting passengers per unit time is much higher than that of vertical elevators, escalators are widely used in places such as shopping malls, airports, high-speed rail stations, subways, and hotels.

[0003] When an escalator encounters a fault, in order to avoid passengers on the escalator from falling down due to too fast deceleration of the escalator, the relevant requirements of the national standard for the working brake of the escalator stipulate that, when the escalator is running downward, the deceleration in the running direction during the braking process of the working brake should not be greater than 1 m / s 2 . When inspecting the escalator, it is generally considered that the average deceleration during the braking process meets the standard, that is, the average deceleration during the process of decelerating from the rated speed to 0 should not be greater than 1 m / s 2 .

[0004] In the prior art, the working brake on the escalator is mostly a mechanical-electrical brake. The braking force of the mechanical-electrical brake is generally generated by one or more compression springs with guides. A braking force balance point is taken between full load and empty load to adjust the compression amount of the spring, so that the braking distance requirement under different load conditions is met when the escalator brakes, and the average deceleration is not greater than 1 m / s 2 . The controller of the escalator judges whether the working brake meets the requirements of the national standard by measuring whether the average deceleration is greater than 1 m / s 2 .

[0005] However, even if the average deceleration meets the requirements of the national standard, when there are children, the elderly, or passengers who have not held on to the escalator, the instantaneous deceleration of the escalator exceeds 1 m / s 2 , there is still a possibility that the children, the elderly, or the passengers who have not held on to the escalator will fall down and get hurt on the escalator due to too rapid braking.

[0006] For customers with strict deceleration requirements, such as subways, high-speed rails, and places with dense passenger flow, if the instantaneous deceleration of the escalator when braking needs to be not greater than 1 m / s 2 , then after the spring is adjusted, under the condition of a fixed spring braking force, it is difficult to simultaneously meet the instantaneous deceleration of not greater than 1 m / s 2 under both empty load and full load. If the compression amount of the spring is adjusted according to the full load condition, the instantaneous deceleration under full load meets the requirement of not greater than 1 m / s 2 , but at the same compression amount of the spring, the instantaneous deceleration under empty load will be greater than 1 m / s2 Therefore, the parameter setting of the spring compression amount of the working brake cannot simultaneously consider both full load and empty load. SUMMARY

[0007] In order to overcome the defects and deficiencies existing in the prior art, the first purpose of the present application is to provide an escalator adaptive braking system, and the second purpose is to provide an escalator adaptive braking method, which can timely adjust the instantaneous deceleration of the escalator to meet the expectation under both full load and empty load.

[0008] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0009] An escalator adaptive braking system comprises a controller, a frequency converter and an escalator motor.

[0010] The controller is provided with a detection and calculation module and a deceleration preset module.

[0011] The controller is electrically connected with the frequency converter and the escalator motor.

[0012] The escalator motor is electrically connected with the frequency converter.

[0013] The detection and calculation module is connected with the deceleration preset module.

[0014] The frequency converter is used for speed regulation of the escalator motor.

[0015] The deceleration preset module is used for setting an instantaneous deceleration expectation curve of the escalator in the deceleration process and an expected braking torque of the escalator motor.

[0016] The detection and calculation module is used for calculating the real-time load torque of the escalator motor and the instantaneous deceleration change of the escalator at the corresponding moment under the working condition of deceleration and stop, and then the controller controls the frequency converter to adjust the output torque of the escalator motor according to the real-time change, so that the subsequent instantaneous deceleration of the escalator coincides with the instantaneous deceleration expectation curve.

[0017] Preferably, the controller is further provided with a frequency control module.

[0018] The frequency control module is electrically connected with the frequency converter, and the frequency control module is connected with the detection and calculation module.

[0019] The frequency control module is used for outputting a corresponding speed regulation control signal of the frequency converter according to the calculation result of the detection and calculation module adjusting the output torque of the escalator motor.

[0020] Preferably, it further comprises a working brake.

[0021] The working brake is electrically connected with the controller, and the working brake is connected with the escalator motor.

[0022] The detection calculation module is configured to control the working brake to mechanically stop the escalator motor when detecting that the variable frequency device adjusts the escalator motor to fail in the working condition.

[0023] Further, the controller is further provided with a brake control module.

[0024] The brake control module is electrically connected with the working brake, and the brake control module is connected with the detection calculation module.

[0025] The brake control module is configured to output a corresponding stop control signal to the working brake when the detection calculation module detects that the variable frequency device adjusts the escalator motor to fail in the working condition.

[0026] Preferably, a backup super capacitor power supply is further included.

[0027] The backup super capacitor power supply is electrically connected with the controller and the variable frequency device respectively.

[0028] The backup super capacitor power supply is configured to supply power to the variable frequency device and / or the controller for a short time when the variable frequency device and / or the controller is powered off.

[0029] Further, the controller is further provided with a power supply switching module.

[0030] The power supply switching module is electrically connected with the backup super capacitor power supply, and the power supply switching module is connected with the detection calculation module.

[0031] The power supply switching module is configured to switch the power supply line to supply power to the variable frequency device and / or the controller for a short time by the backup super capacitor power supply when the detection calculation module detects that the variable frequency device and / or the controller is powered off.

[0032] According to the escalator adaptive braking method of any one of the foregoing escalator adaptive braking systems, the method comprises the following steps:

[0033] In the deceleration preset module of the controller, an instantaneous deceleration expected curve of the escalator in the deceleration process and an expected braking torque of the escalator motor are set.

[0034] The detection calculation module of the controller calculates the real-time load torque of the escalator motor and the instantaneous deceleration change of the escalator at the corresponding time under the condition of deceleration stopping.

[0035] The detection calculation module compares the real-time change with the instantaneous deceleration expected curve of the escalator in the deceleration process and the expected braking torque of the escalator motor set in the deceleration preset module.

[0036] When the detection calculation module detects that the real-time instantaneous deceleration of the escalator motor deviates from the set instantaneous deceleration expected curve, the controller controls the variable frequency device to adjust the output torque of the escalator motor, so that the subsequent instantaneous deceleration of the escalator coincides with the instantaneous deceleration expected curve.

[0037] Preferably, when the detection calculation module controls the frequency converter, it further comprises the step of:

[0038] The detection calculation module detects whether the frequency converter adjusts the escalator motor to fail.

[0039] When the working condition of the frequency converter adjusting the escalator motor is detected to fail, the brake control module outputs a corresponding stop control signal to the working brake to control the working brake to mechanically stop the escalator motor.

[0040] Preferably, when the detection calculation module controls the frequency converter, it further comprises the step of:

[0041] The detection calculation module detects whether the frequency converter and / or the controller are powered off.

[0042] When the working condition of the frequency converter and / or the controller being powered off is detected, the power supply switching module switches the power supply line to short-time power supply from the backup super capacitor power supply to the frequency converter and / or the controller.

[0043] Preferably, the frequency control module in the controller outputs a corresponding speed control signal to control the output torque of the frequency converter adjusting the escalator motor.

[0044] Before the deceleration preset module is set, the forced release parameter of the spring closing force in the working brake is set according to the working condition when full load.

[0045] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0046] The present application can ensure that the brake distance of the escalator meets the requirements of the national standard GB16899-2011 under different load conditions, and at the same time, the stopping process is more stable, and the instantaneous deceleration during the entire stopping process also does not exceed 1m / s 2 , avoiding passenger injury caused by sudden braking, and reducing brake shoe wear; when the frequency converter fails to brake, the working brake can be activated in advance to ensure that the braking distance of the escalator meets the standard and completely stops. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a schematic diagram of the frame structure of an escalator adaptive braking system of the present application;

[0048] Figure 2 is a flowchart of an escalator adaptive braking method of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application clearer and more apparent, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0050] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0051] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Similarly, words such as "a," "one," or "the" do not indicate a quantity limitation but rather that at least one exists. Words such as "including" or "comprising" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "electrically connected" or "connected" are not limited to physical or mechanical electrical connections but can include electrical connections, whether direct or indirect.

[0052] Example 1

[0053] like Figure 1 As shown in the figure. This embodiment provides an escalator adaptive braking system, including a controller, a frequency converter, an escalator motor, a working brake, and a backup supercapacitor power supply.

[0054] The controller is electrically connected to the frequency converter, the service brake, the escalator motor, and the backup supercapacitor power supply. The escalator motor is electrically connected to the frequency converter, and the service brake is also connected to the escalator motor. The frequency converter is used to regulate the speed of the escalator motor by adjusting the input voltage or current, thereby changing the output torque and speed of the escalator motor. The service brake mechanically stops the escalator motor by actuating its shaft. The backup supercapacitor power supply is electrically connected to the frequency converter.

[0055] The controller is equipped with a detection and calculation module, a deceleration preset module, a frequency conversion control module, a braking control module, and a power supply switching module.

[0056] The detection and calculation module is connected to the deceleration preset module. The deceleration preset module is used to set the expected instantaneous deceleration curve and the expected braking torque of the escalator motor during the deceleration process. The detection and calculation module is used to calculate the real-time load torque of the escalator motor and the corresponding instantaneous deceleration change of the escalator when it stops. Then, the controller controls the frequency converter to adjust the output torque of the escalator motor according to the real-time changes, so that the subsequent instantaneous deceleration of the escalator matches the expected instantaneous deceleration curve.

[0057] The variable frequency control module is electrically connected with the frequency converter, and the variable frequency control module is connected with the detection and calculation module.

[0058] The detection and calculation module is used for controlling the working brake to mechanically stop the escalator motor when the detection and calculation module detects the working condition that the frequency converter fails to adjust the output torque of the escalator motor.

[0059] The brake control module is electrically connected with the working brake, and the brake control module is connected with the detection and calculation module. The brake control module is used for outputting a corresponding stop control signal to the working brake when the detection and calculation module detects the working condition that the frequency converter fails to adjust the escalator motor.

[0060] The backup super capacitor power supply is used for short-time power supply to the frequency converter and / or the controller when the frequency converter and / or the controller are powered off.

[0061] The power supply switching module is electrically connected with the backup super capacitor power supply, and the power supply switching module is connected with the detection and calculation module. The power supply switching module is used for switching the power supply line to short-time power supply from the backup super capacitor power supply to the frequency converter and / or the controller when the detection and calculation module detects that the frequency converter and / or the controller are powered off.

[0062] Compared with the prior art, the embodiment has the beneficial effects that:

[0063] The embodiment can ensure that the brake distance of the escalator meets the requirements of the national standard GB16899-2011 under different load conditions, and make the stopping process more stable, and the instantaneous deceleration of the whole stopping process also does not exceed 1 m / s 2 , avoid passenger falling and injury caused by too rapid braking, and reduce the wear of the brake shoe; when the frequency converter fails to brake, the working brake can be actuated in advance to ensure that the braking distance of the escalator meets the standard and is completely stopped.

[0064] Embodiment 2

[0065] As shown in Figure 2 , the escalator adaptive braking method provided by the embodiment comprises the following steps:

[0066] S1, the forced release parameter of the spring closing force in the working brake is set according to the working condition when the escalator is fully loaded;

[0067] S2, the instantaneous deceleration expected curve of the escalator in the deceleration process and the expected braking torque of the escalator motor are set in the deceleration preset module of the controller, and then the escalator is started to run;

[0068] S3、by the detection calculation module of the controller in the working condition of deceleration stopping, for example, the detection calculation module detects that the escalator is powered off and stops, the escalator is faulty and decelerates, and the manual stop deceleration, the real-time load torque of the escalator motor and the instantaneous deceleration change of the escalator at the corresponding moment are calculated;

[0069] S4、the detection calculation module compares the real-time change with the instantaneous deceleration expected curve of the escalator in the deceleration process and the expected braking torque of the escalator motor set in the deceleration preset module;

[0070] S5、when the detection calculation module detects that the real-time instantaneous deceleration of the escalator motor deviates from the set instantaneous deceleration expected curve, the controller controls the frequency converter to adjust the output torque of the escalator motor, so that the subsequent instantaneous deceleration of the escalator conforms to the instantaneous deceleration expected curve; specifically, the frequency control module in the controller outputs corresponding speed regulation control signals to control the frequency converter to adjust the output torque of the escalator motor;

[0071] S6、while executing any one of steps S3 to S5, the detection calculation module detects whether the frequency converter adjusts the escalator motor to fail;

[0072] When the working condition of detecting that the frequency converter adjusts the escalator motor to fail is detected, step S3 or step S4 or step S5 is immediately interrupted, and the step is executed, the brake control module outputs corresponding stop control signals to the working brake to control the working brake to mechanically stop the escalator motor according to the set forced release parameters;

[0073] Otherwise, execute steps S3 to S5;

[0074] S7、while executing any one of steps S3 to S6, the detection calculation module detects whether the frequency converter and / or the controller is powered off;

[0075] When the working condition of detecting that the frequency converter and / or the controller is powered off is detected, step S3 or step S4 or step S5 or step S6 is immediately interrupted, and the step is executed, the power supply switching module switches the power supply line to short-time power supply from the standby super capacitor power supply to the frequency converter and / or the controller, and then returns to step S6 to start again.

[0076] Compared with the prior art, the embodiment has the following beneficial effects:

[0077] The embodiment can ensure that the brake distance meets the requirements of the national standard GB16899-2011 under different load conditions, and at the same time, the stopping process is more stable, and the instantaneous deceleration of the whole stopping process also does not exceed 1m / s 2 , avoiding passenger falling and injury caused by too rapid braking, and reducing brake shoe wear; when the frequency converter brake fails, the working brake can be actuated in advance to ensure that the brake distance of the escalator meets the standard and is completely stopped.

[0078] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, simplifications, etc. made without departing from the spirit and principles of the present application should be equivalent replacement manners and should be included in the protection scope of the present application.

Claims

1. An escalator adaptive braking system, characterized in that, Includes controllers, frequency converters, and escalator motors; The controller is equipped with a detection and calculation module and a deceleration preset module; The controller is electrically connected to the frequency converter and the escalator motor respectively; The escalator motor is electrically connected to the frequency converter; The detection and calculation module is connected to the deceleration preset module; The frequency converter is used to regulate the speed of the escalator motor; The deceleration preset module is used to set the expected instantaneous deceleration curve of the escalator during the deceleration process and the expected braking torque of the escalator motor; The detection and calculation module is used to calculate the real-time load torque of the escalator motor and the instantaneous deceleration change of the escalator at the corresponding moment when the escalator is decelerating and stopping. Then, the controller controls the frequency converter to adjust the output torque of the escalator motor according to the real-time changes, so that the subsequent instantaneous deceleration of the escalator matches the expected instantaneous deceleration curve.

2. The escalator adaptive braking system according to claim 1, characterized in that, The controller also includes a frequency converter module; The frequency converter control module is electrically connected to the frequency converter, and the frequency converter control module is connected to the detection and calculation module; The frequency converter control module is used to adjust the output torque of the escalator motor according to the calculation results of the detection and calculation module, and output the corresponding speed control signal to the frequency converter.

3. The escalator adaptive braking system according to claim 1, characterized in that, It also includes the working brake; The working brake is electrically connected to the controller and is also connected to the escalator motor. The detection and calculation module is used to control the working brake to mechanically stop the escalator motor when the inverter adjustment malfunctions.

4. The escalator adaptive braking system according to claim 3, characterized in that, The controller also includes a braking control module; The braking control module is electrically connected to the working brake, and the braking control module is also connected to the detection and calculation module. The braking control module is used to output a corresponding stop control signal to the working brake when the detection and calculation module detects that the frequency converter has failed to adjust the escalator motor.

5. The escalator adaptive braking system according to claim 1, characterized in that, It also includes a backup supercapacitor power supply; The backup supercapacitor power supply is electrically connected to the controller and the frequency converter, respectively. The backup supercapacitor power supply is used to provide short-term power to the inverter and / or controller when the inverter and / or controller is powered off.

6. The escalator adaptive braking system according to claim 5, characterized in that, The controller also has a power supply switching module; The power supply switching module is electrically connected to the backup supercapacitor power supply, and the power supply switching module is also connected to the detection and calculation module. The power supply switching module is used to switch the power supply line to a backup supercapacitor power supply for a short time when the detection and calculation module detects a power failure in the inverter and / or controller.

7. The escalator adaptive braking method of the escalator adaptive braking system according to any one of claims 1-6, characterized in that, The steps include the following: In the deceleration preset module of the controller, the expected instantaneous deceleration curve of the escalator during the deceleration process and the expected braking torque of the escalator motor are set. The controller's detection and calculation module calculates the real-time load torque of the escalator motor and the instantaneous deceleration change of the escalator at the corresponding moment when the escalator is decelerating and stopping. The detection and calculation module compares the real-time changes with the instantaneous deceleration expected curve of the escalator during the deceleration process and the expected braking torque of the escalator motor set in the deceleration preset module. When the detection and calculation module detects that the real-time instantaneous deceleration of the escalator motor deviates from the set instantaneous deceleration expectation curve, the controller controls the frequency converter to adjust the output torque of the escalator motor so that the subsequent instantaneous deceleration of the escalator matches the instantaneous deceleration expectation curve.

8. The escalator adaptive braking method according to claim 7, characterized in that, When the detection and calculation module controls the frequency converter, the following steps are also included: The detection and calculation module detects whether the frequency converter is malfunctioning and adjusts the escalator motor. When the inverter fails to adjust the escalator motor, the braking control module outputs a corresponding stop control signal to the working brake to mechanically stop the escalator motor.

9. The escalator adaptive braking method according to claim 7, characterized in that, When the detection and calculation module controls the frequency converter, the following steps are also included: The detection and calculation module detects whether the frequency converter and / or controller is powered off; When a power failure is detected in the inverter and / or controller, the power supply switching mode switches the power supply line to a backup supercapacitor power supply for a short period of time to the inverter and / or controller.

10. The escalator adaptive braking method according to claim 7, characterized in that, The frequency converter control module in the controller outputs the corresponding speed control signal to control the frequency converter to adjust the output torque of the escalator motor. Before setting the deceleration preset module, set the forced release parameter of the spring closing force in the working brake according to the working conditions under full load.

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