Elevator braking device, braking control method, device and storage medium

Abstract

The present application relates to an elevator braking device, a braking control method, an apparatus and a storage medium. The elevator braking device includes a drive module and a plurality of brakes; the drive module is connected to each brake; in the event of a power failure in the power grid, the drive module drives any brake to perform a braking action; the drive module drives another brake to perform a braking action after a preset time interval to complete this drive, and updates the number of drives; the drive module accumulates the number of drives until all brakes complete the braking action. The above-mentioned elevator braking device can enable each set of brakes to brake separately, and the braking torque is generated in advance in the form of a reduction of several times, and after a delay of a preset time, another set of brakes generates a braking torque for superimposed braking. This reduces the rate of increase of the braking torque, thereby effectively reducing the deceleration of the car in the event of a power failure and reducing the impact on passengers. At the same time, the wear of the wire rope and traction wheel components is reduced, and the service life is increased.

Description

Technical Field

[0001] The present application relates to the technical field of elevators, and in particular to an elevator braking device, a braking control method, a device and a storage medium. Background Art

[0002] As elevators become increasingly popular, they have become an indispensable means of vertical transportation in daily production and life. Elevator braking, an essential part of elevator technology, currently has three types of braking devices in traditional elevator technology: overspeed governor braking, rope gripper braking, and brake braking.

[0003] During the implementation process, the inventors discovered that there are at least the following problems in the traditional technology: the traditional brake has problems such as short equipment service life. Summary of the Invention

[0004] Based on this, it is necessary to provide an elevator braking device, a braking control method, an apparatus and a storage medium that can increase the service life of the equipment in order to address the above technical problems.

[0005] To achieve the above-mentioned object, on the one hand, an embodiment of the present invention provides an elevator braking device, comprising a drive module and a plurality of brakes; the drive module is connected to each brake;

[0006] In the event of a power failure in the grid, the drive module drives any brake to perform a braking action; after a preset time interval, the drive module drives another brake to perform a braking action to complete this drive and updates the number of drives; the drive module accumulates the number of drives until all brakes complete the braking action.

[0007] In one embodiment, the driving module includes a plurality of freewheeling circuits;

[0008] One end of the freewheeling circuit is connected to one end of the corresponding brake coil and is used to connect to the corresponding output end of the grid power supply, and the other end is connected to the other end of the corresponding brake coil and is used to connect to the input end of the grid power supply; wherein, the discharge time constants of each freewheeling circuit are different.

[0009] In one embodiment, the number of the brakes is two; the number of the freewheeling circuits is two;

[0010] Any freewheeling circuit includes a first resistor and a first diode; one end of the first resistor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the first diode; the cathode of the first diode is connected to the other end of the corresponding brake coil;

[0011] Another freewheeling circuit includes a second resistor and a second diode; one end of the second resistor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the second diode; the cathode of the second diode is connected to the other end of the corresponding brake coil.

[0012] In one embodiment, the first resistor includes any one of the following resistors: a fixed resistor or an adjustable resistor;

[0013] The second resistor includes any one of the following resistors: a fixed resistor or an adjustable resistor.

[0014] In one embodiment, the number of the brakes is two; the number of the freewheeling circuits is two;

[0015] Any freewheeling circuit includes a third diode and a fourth diode; the anode of the third diode is connected to the anode of the fourth diode, and the cathode is connected to one end of the corresponding brake coil; the cathode of the fourth diode is connected to the other end of the corresponding brake coil.

[0016] In one embodiment, another freewheeling circuit includes a fifth diode; an anode of the fifth diode is connected to one end of the corresponding brake coil, and a cathode of the fifth diode is connected to the other end of the corresponding brake coil;

[0017] Alternatively, another freewheeling circuit includes a sixth diode and an inductor; one end of the inductor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the sixth diode; the cathode of the sixth diode is connected to the other end of the corresponding brake coil;

[0018] Alternatively, another freewheeling circuit includes a seventh diode and a capacitor; the anode of the seventh diode is respectively connected to one end of the capacitor and one end of the corresponding brake coil, and the cathode is respectively connected to the other end of the capacitor and the other end of the corresponding brake coil.

[0019] In one embodiment, the driving module includes a control circuit; the control circuit includes a plurality of output terminals; the output terminals are connected to the brakes in a one-to-one correspondence;

[0020] In the event of a power failure in the grid, the control circuit stops supplying power to the coil of any brake; after a preset time interval, the control circuit stops supplying power to the other brake to complete the power-off action and updates the number of power-off times; the control circuit accumulates the number of power-off times until all brakes have completed the power-off action.

[0021] On the one hand, an embodiment of the present invention further provides a brake control method for an elevator brake device, comprising the steps of:

[0022] In the event of a power failure in the grid, any brake will be driven to perform braking action;

[0023] After a preset time interval, another brake is driven to perform a braking action to complete the current drive and the number of drives is updated;

[0024] The number of actuations is accumulated until each brake has completed the braking action.

[0025] In one aspect, an embodiment of the present invention further provides a brake control device, comprising:

[0026] The first driving module is used to drive any brake to perform braking action when the grid power fails;

[0027] The second driving module is used to drive another brake to perform a braking action after a preset time interval to complete the current driving and update the driving count;

[0028] The accumulation module is used to accumulate the number of driving times until all brakes complete the braking action.

[0029] On the other hand, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when the computer program is executed by a processor.

[0030] One of the above technical solutions has the following advantages and beneficial effects:

[0031] The elevator braking device described above includes a drive module and multiple brakes; the drive module is connected to each brake; in the event of a power outage, the drive module drives any brake to perform a braking action; after a preset time interval, the drive module drives another brake to perform a braking action to complete this actuation and updates the number of actuations; the drive module accumulates the number of actuations until all brakes have completed the braking action. Using the elevator braking device described above, in the event of a power outage, any brake is actuated to perform braking, and after a preset time interval, another brake is actuated to perform braking, and the above actuation steps are repeated until all brakes have completed the braking action. Each set of brakes can be braked separately, with the braking torque generated in advance in a reduced form by several times, and then after a preset time delay, another set of brakes generates a braking torque for superimposed braking. This reduces the rate of increase in braking torque, effectively reducing the deceleration of the car in the event of a power outage and reducing the impact on passengers. At the same time, since the braking torque is extended during the braking process, the initial velocity of the elevator car will be reduced after the elevator traction sheave is stopped, thereby reducing the slip time and distance of the wire rope, reducing the wear of the wire rope and traction sheave components, and increasing their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of the preferred embodiments of the present application shown in the accompanying drawings. Like reference numerals indicate like parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual size, with the emphasis on illustrating the subject matter of the present application.

[0033] Figure 1 1 is a first schematic structural block diagram of a conventional elevator power-off braking device in one embodiment;

[0034] Figure 2 FIG2 is a second schematic structural block diagram of a conventional elevator power-loss braking device in one embodiment;

[0035] Figure 3 Schematic diagram of the operating state of a conventional elevator when power is lost in one embodiment;

[0036] Figure 4 is a first schematic structural block diagram of an elevator braking device in one embodiment;

[0037] Figure 5 is a structural block diagram of a driving module in one embodiment;

[0038] Figure 6 is a second schematic structural block diagram of an elevator braking device in one embodiment;

[0039] Figure 7 A comparison diagram of the operating states of a conventional elevator braking device and the elevator braking device of the present application in one embodiment;

[0040] Figure 8 is a third schematic structural block diagram of an elevator braking device in one embodiment;

[0041] Figure 9 is a first schematic structural block diagram of a freewheeling circuit in one embodiment;

[0042] Figure 10 is a second schematic structural block diagram of a freewheeling circuit in one embodiment;

[0043] Figure 11 is a third schematic structural block diagram of a freewheeling circuit in one embodiment;

[0044] Figure 12 1 is a flow chart of a braking control method according to an embodiment;

[0045] Figure 13 FIG. 4 is a structural block diagram of a brake control device in one embodiment. DETAILED DESCRIPTION

[0046] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0048] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0049] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0050] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0051] like Figure 1 As shown in the figure, the current elevator power-off braking mainly adopts the following method: the elevator traction machine is mainly equipped with two sets of brakes (brakes A and B) and a traction sheave, and the two sides of the traction sheave are connected to the counterweight and the car respectively through wire ropes. The control method of the brake coil is to connect in parallel (coils A and B), and the brake control circuit is equipped with a freewheeling circuit, including a freewheeling resistor R and a diode. Figure 2 As shown, one end of the freewheeling resistor R is connected to the anode of the diode, and the other end is connected to one end of coil A and coil B respectively; the cathode of the diode is connected to the other end of coil A and coil B respectively. When the brake is started and released, brake A and brake B respond almost simultaneously.

[0052] The elevator's operating status when the control circuit or power supply fails is as follows: Figure 3 As shown:

[0053] During the t0→t1 stage, the elevator runs stably. At this time, the coil currents of brake A and brake B are energized and opened, the brakes do not generate braking torque, the traction sheave rotates stably, and the car runs stably.

[0054] During the t1→t2 phase, the elevator control circuit or power supply loses power. Because the brake coils are inductive components, the coil currents of brakes A and B do not drop to zero, but instead decrease parabolically. The brakes prepare to brake the traction motor, but they still do not generate braking torque. The traction sheave continues to accelerate due to the unbalanced torque, and the car accelerates along with the traction sheave.

[0055] During the t2→t3 stage, the coil currents of brake A and brake B continue to decrease, the brakes begin to generate braking torque and gradually increase it to maintain stability, and the traction sheave of the traction machine is decelerated to stop rotating; since the car and the traction sheave are driven by friction of the wire rope, the inertia torque of the car causes the wire rope to slip and continue to move, and the car speed is not zero.

[0056] During the t3→t4 phase, the car slows down and stops due to the friction between the wire rope and the traction sheave.

[0057] Because the two brakes are wired in parallel, if the control circuit power or power supply fails, both brakes A and B lose power simultaneously, generating braking torques that are essentially superimposed. This results in high deceleration, which can cause discomfort to passengers in the car. When the traction machine is quickly stopped, the inertia of the car or counterweight can easily cause the wire rope connecting the car and counterweight to slip, causing wear on the wire rope and traction sheave components, reducing their service life.

[0058] The elevator braking device provided in this application can effectively solve the above problems.

[0059] In one embodiment, Figure 4 As shown, an elevator braking device is provided, comprising a drive module and a plurality of brakes; the drive module is connected to each brake;

[0060] In the event of a power failure in the grid, the drive module drives any brake to perform a braking action; after a preset time interval, the drive module drives another brake to perform a braking action to complete this drive and updates the number of drives; the drive module accumulates the number of drives until all brakes complete the braking action.

[0061] The drive module is used to drive the brake to perform a braking action. The drive module can be any device in the art that can drive the brake, such as a freewheeling circuit for freewheeling the brake coil and a power supply control circuit for powering the brake coil.

[0062] Specifically, the number of brakes can be multiple groups, that is, two groups or more, for braking the traction wheel. In the event of a power outage in the grid power supply, the drive module can use any means in the art to drive the brake. In a specific example, the specific method of driving the brake to perform a braking action is to de-energize the brake coil, thereby eliminating the electromagnetic force generated by the brake electromagnet core. This electromagnetic force overcomes the spring force to attract the armature to move toward the electromagnet core, thereby causing the brake component to detach from the brake wheel of the motor and release the braking state of the traction machine. In the event of a power outage in the grid power supply, the brake component brakes the traction machine under the influence of the spring force.

[0063] After a preset time interval, the drive module drives another brake to perform a braking action. It should be noted that the preset time length can be determined by the component parameters of the freewheeling circuit, and the freewheeling circuit is independently connected in parallel with each coil. That is, due to the discharge principle of the inductive energy storage element, the smaller the discharge constant, the faster the current in the coil circuit decays, and the faster the brake responds to braking; conversely, the larger the discharge constant, the slower the current in the coil circuit decays, and the slower the brake responds to braking. By setting the parameters of different components, each brake can be braked in sequence. Furthermore, the preset time length can be controlled by the control circuit. For example, in the event of a power failure in the grid power supply, the control circuit controls the power supply time sequence to each brake coil to achieve sequential braking of each brake. It should be noted that the above-mentioned control circuit can be any power supply control circuit in the field, and the specific structure is not specifically limited here.

[0064] Furthermore, the driver module completes this actuation by actuating another brake after a preset time interval, and the actuation count is updated after this actuation is completed. The driver module accumulates the actuation count until each brake has completed its braking action, which means that each brake must complete braking at the preset time interval. It should be noted that the preset time interval can be a fixed value or a random value, as long as the brakes are applied in the order in which they are applied.

[0065] The above-mentioned elevator braking device drives any brake to brake in the event of a power outage, and drives another brake to brake after a preset time interval, and repeats the above-mentioned driving steps until all brakes have completed the braking action. Through the above-mentioned elevator braking device, each group of brakes can be braked separately, and the braking torque is generated in advance in the form of a reduction of several times, and after a delay of a preset time, another group of brakes will generate a braking torque for superimposed braking. This reduces the rate of increase of the braking torque, and thus effectively reduces the deceleration of the car in the event of a power outage, reducing the impact on passengers. At the same time, since the braking torque is extended during the braking process, the initial velocity of the car will be reduced after the elevator traction sheave is stopped, thereby reducing the slip time and slip distance of the wire rope, reducing the wear of the wire rope and traction sheave components, and increasing the service life.

[0066] In a specific embodiment, Figure 5 As shown, the driving module includes multiple freewheeling circuits;

[0067] One end of the freewheeling circuit is connected to one end of the corresponding brake coil and is used to connect to the corresponding output end of the grid power supply, and the other end is connected to the other end of the corresponding brake coil and is used to connect to the input end of the grid power supply (that is, input A, input B and input C in the accompanying drawings, etc.); wherein, the discharge time constants of each of the freewheeling circuits are different.

[0068] It should be noted that the discharge time constant can be calculated according to the existing formulas based on the types and parameters of the components in the freewheeling circuit, and will not be described in detail here. The types and parameters of the components of each freewheeling circuit can be designed according to actual needs, as long as the discharge time constants are different. The grid power supply includes multiple output terminals, which are used to supply power to each brake coil respectively. Each freewheeling circuit is connected in parallel with the corresponding brake coil. In other words, the freewheeling circuit corresponds to the brake one-to-one and is connected in parallel. It should be noted that the output terminal corresponding to the grid power supply is the negative pole of the power supply, and the input terminal is the positive pole of the power supply.

[0069] In one embodiment, Figure 6 As shown, the number of brakes is two; the number of freewheeling circuits is two;

[0070] Any freewheeling circuit includes a first resistor R1 and a first diode D1; one end of the first resistor R1 is connected to one end of the corresponding brake coil A, and the other end is connected to the anode of the first diode D1; the cathode of the first diode D1 is connected to the other end of the corresponding brake coil A;

[0071] Another freewheeling circuit includes a second resistor R2 and a second diode D2; one end of the second resistor R2 is connected to one end of the corresponding brake coil B, and the other end is connected to the anode of the second diode D2; the cathode of the second diode D2 is connected to the other end of the corresponding brake coil B.

[0072] It should be noted that each brake coil is independently powered by the grid power supply, and there is no mutual interference between the brake coils. Specifically, one end of the first resistor is connected to the output terminal of the grid power supply, and the cathode of the first diode D1 is connected to the input terminal A of the grid power supply; one end of the second resistor is connected to the output terminal of the grid power supply, and the cathode of the second diode D2 is connected to the input terminal B of the grid power supply. Furthermore, in each embodiment of the present application, one end of the brake coil is connected to the output terminal of the grid power supply, and the other end is connected to the input terminal of the grid power supply.

[0073] Specifically, when the number of brakes is two, the number of corresponding freewheeling circuits is also two. The first resistor and the second resistor are used to describe and distinguish components. For example, without departing from the scope of this application, the first resistor can be referred to as the second resistor, and similarly, the second resistor can be referred to as the first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor. In one embodiment, the first resistor includes any one of the following resistors: a fixed resistor or an adjustable resistor; the second resistor includes any one of the following resistors: a fixed resistor or an adjustable resistor.

[0074] The first resistor and the second resistor may be adjustable resistors, and the discharge time parameter may be adjusted by the adjustable resistors to selectively control the priority response and the delayed response of the brake. The first resistor and the second resistor may also be fixed resistors.

[0075] The first and second diodes are both freewheeling diodes. When the current of an inductive load suddenly changes or decreases, a sudden voltage surge will occur across the inductor, potentially damaging other components. When used with freewheeling diodes, the current can change more smoothly, preventing voltage surges.

[0076] The comparison between the running state of the elevator when the control circuit or power supply loses power and the existing technology is as follows: Figure 7 shown.

[0077] During the t0→t1 stage, the elevator runs stably. At this time, the coil currents of brake A and brake B are energized and opened, the brakes do not generate braking torque, the traction sheave rotates stably, and the car runs stably.

[0078] During the period t1 to tA, the elevator control circuit or power supply loses power. Because the brake coils are inductive components, the coil currents of brakes A and B do not drop to zero suddenly. Instead, they decrease parabolically. The brakes prepare to brake the traction motor, but they still do not generate braking torque. The traction sheave continues to accelerate due to the unbalanced torque, and the car accelerates along with the traction sheave.

[0079] During the tA→tB phase, because the freewheeling resistor R1>R2, the coil current in brake A decays faster than that in brake B. Brake A begins generating braking torque first and gradually increases it, while brake B still does not generate any braking torque. Therefore, the traction sheave of the traction machine is gradually decelerated by the unilateral braking torque, and the deceleration is lower than the deceleration generated by the superposition of bilateral braking torques. At the same time, the car is gradually decelerated along with the traction sheave.

[0080] During the period tB to t3', brake B begins to apply braking torque, which, combined with the braking torque of brake A, accelerates and stops the traction sheave. The traction sheave is gradually decelerated until it stops. However, since the car and the traction sheave are driven by friction with the wire rope, the inertia moment of the car causes the wire rope to slip, causing the car to continue moving, resulting in a non-zero car speed.

[0081] During the t3'→t4' stage, the car slows down and stops due to the friction between the wire rope and the traction sheave.

[0082] In one embodiment, Figure 8 As shown, the number of brakes is two; the number of freewheeling circuits is two;

[0083] Any freewheeling circuit includes a third diode D3 and a fourth diode D4; the anode of the third diode D3 is connected to the anode of the fourth diode D4, and the cathode is connected to one end of the corresponding brake coil; the cathode of the fourth diode D4 is connected to the other end of the corresponding brake coil.

[0084] Specifically, when current passes through the coil, an induced electromotive force is generated at both ends of the coil. When the current disappears, the induced electromotive force will generate a reverse voltage on the components in the circuit. The freewheeling diode is connected in parallel at both ends of the coil. When the current flowing through the coil disappears, the induced electromotive force generated by the coil is consumed by doing work in the loop formed by the diode and the coil. The freewheeling diode is connected in reverse parallel at both ends of the relay or inductor in the circuit. When the inductor is powered off, the electromotive force at both ends does not disappear immediately. At this time, the residual electromotive force is released through a diode. In this embodiment, the anodes of the two diodes in the freewheeling circuit are connected to each other, and the cathodes are connected to the coil. The discharge time constant is related to the equivalent resistance of the third diode and the fourth diode.

[0085] Furthermore, the freewheeling circuit can not only be the above-mentioned structure, but can also adopt a separate diode, a circuit structure in which a diode and an inductor are connected in series, and a circuit structure in which a diode and a capacitor are connected in parallel. For example: the freewheeling circuit includes a diode, and the diode is connected in reverse parallel to the coil; the freewheeling circuit includes an inductor and a diode, one end of the inductor is connected to the anode of the diode, the other end is connected to one end of the coil, and the cathode of the diode is connected to the other end of the coil. For another example: the freewheeling circuit includes a capacitor and a diode, one end of the diode is respectively connected to one end of the coil and one end of the capacitor. The other end is respectively connected to the other end of the coil and the other end of the capacitor.

[0086] In one embodiment, Figure 9 As shown, another freewheeling circuit includes a fifth diode; the anode of the fifth diode is connected to one end of the corresponding brake coil, and the cathode is connected to the other end of the corresponding brake coil;

[0087] or, as Figure 10 As shown, another freewheeling circuit includes a sixth diode and an inductor; one end of the inductor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the sixth diode; the cathode of the sixth diode is connected to the other end of the corresponding brake coil;

[0088] or, as Figure 11 As shown, another freewheeling circuit includes a seventh diode and a capacitor; the anode of the seventh diode is respectively connected to one end of the capacitor and one end of the corresponding brake coil, and the cathode is respectively connected to the other end of the capacitor and the other end of the corresponding brake coil.

[0089] It should be noted that the two freewheeling circuits only need to have different discharge time constants. The specific circuit structure is not particularly limited.

[0090] In one embodiment, the driving module includes a control circuit; the control circuit includes a plurality of output terminals; the output terminals are connected to the brakes in a one-to-one correspondence;

[0091] In the event of a power failure in the grid, the control circuit stops supplying power to the coil of any brake; after a preset time interval, the control circuit stops supplying power to the other brake to complete the power-off action and updates the number of power-off times; the control circuit accumulates the number of power-off times until all brakes have completed the power-off action.

[0092] Specifically, the control circuit can be any power supply control circuit known in the art. The control circuit transmits power to the corresponding brake via each output terminal. The control circuit supplies power to each brake so that the brake is released. In the event of a power outage, the control circuit stops supplying power to any brake, causing the brake that lost power to engage. After a preset time interval, the control circuit stops supplying power to the remaining brake. Through this process, the brakes lose power and engage in braking one by one.

[0093] In one embodiment, Figure 12 As shown, a braking control method for an elevator braking device is also provided, comprising the steps of:

[0094] S1210, in the event of a power failure of the grid power supply, driving any brake to perform a braking action;

[0095] S1220, after a preset time interval, actuate another brake to perform a braking action to complete the current actuation, and update the actuation count;

[0096] S1230: Accumulate the number of driving times until all brakes complete the braking action.

[0097] Specifically, the above method can be used in a braking system including multiple brakes. By driving the brakes in sequence, the impact on passengers is reduced when the elevator loses power, and the wear of the traction rope and traction sheave components is reduced, thereby increasing the service life.

[0098] It should be understood that although Figure 12 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 12 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0099] In one embodiment, Figure 13 As shown, a brake control device is provided, comprising:

[0100] The first driving module is used to drive any brake to perform braking action when the grid power fails;

[0101] The second driving module is used to drive another brake to perform a braking action after a preset time interval to complete the current driving and update the driving count;

[0102] The accumulation module is used to accumulate the number of driving times until all brakes complete the braking action.

[0103] The specific definition of the brake control device can be found in the definition of the brake control method above and will not be repeated here. Each module in the brake control device described above may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in hardware form, or may be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0104] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0105] In the event of a power failure in the grid, any brake will be driven to perform braking action;

[0106] After a preset time interval, another brake is driven to perform a braking action to complete the current drive and the number of drives is updated;

[0107] The number of actuations is accumulated until each brake has completed the braking action.

[0108] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus dynamic random access memory (Rambus DRAM, abbreviated as RDRAM), and interface dynamic random access memory (DRDRAM).

[0109] Throughout this specification, references to terms such as "some embodiments," "other embodiments," and "desired embodiments" indicate that a particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Although these terms are used interchangeably throughout this specification, they do not necessarily refer to the same embodiment or example.

[0110] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An elevator braking device, characterized in that: The invention comprises a driving module and a plurality of brakes; the driving module is connected to each of the brakes; wherein the driving module is used to drive the brakes so that the brakes perform a braking action; In the event of a power failure in the grid, the drive module drives any brake to perform a braking action; The driving module drives another brake to perform a braking action after a preset time interval to complete the current driving and updates the number of driving times; the preset time interval is a fixed value or a random value; The driving module accumulates the number of driving times until all the brakes complete the braking action; The drive module includes a plurality of freewheeling circuits; one end of the freewheeling circuit is connected to one end of the corresponding brake coil and is used to connect to the corresponding output end of the grid power supply, and the other end is connected to the other end of the corresponding brake coil and is used to connect to the input end of the grid power supply; wherein the discharge time constant of each freewheeling circuit is different; The driving module includes a control circuit; the control circuit includes a plurality of output terminals; the output terminals are connected to the brakes in a one-to-one correspondence; In the event of a power failure in the grid, the control circuit stops supplying power to the coil of any one of the brakes; the control circuit stops supplying power to the other brake after a preset time interval to complete the power-off action and updates the number of power-offs; the control circuit accumulates the number of power-offs until all the brakes complete the power-off action.

2. The elevator braking device according to claim 1, characterized in that: The number of the brakes is two; the number of the freewheeling circuits is two; Any of the freewheeling circuits includes a first resistor and a first diode; one end of the first resistor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the first diode; the cathode of the first diode is connected to the other end of the corresponding brake coil; Another freewheeling circuit includes a second resistor and a second diode; one end of the second resistor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the second diode; the cathode of the second diode is connected to the other end of the corresponding brake coil.

3. The elevator braking device according to claim 2, characterized in that: The first resistor includes any one of the following resistors: a fixed resistor or an adjustable resistor; The second resistor includes any one of the following resistors: a fixed resistor or an adjustable resistor.

4. The elevator braking device according to claim 1, characterized in that: The number of the brakes is two; the number of the freewheeling circuits is two; Any of the freewheeling circuits includes a third diode and a fourth diode; the anode of the third diode is connected to the anode of the fourth diode, and the cathode is connected to one end of the corresponding brake coil; the cathode of the fourth diode is connected to the other end of the corresponding brake coil.

5. The elevator braking device according to claim 4, characterized in that: Another freewheeling circuit includes a fifth diode; the anode of the fifth diode is connected to one end of the corresponding brake coil, and the cathode is connected to the other end of the corresponding brake coil; Alternatively, another freewheeling circuit includes a sixth diode and an inductor; one end of the inductor is connected to one end of the corresponding brake coil, and the other end is connected to the anode of the sixth diode; the cathode of the sixth diode is connected to the other end of the corresponding brake coil; Alternatively, the other freewheeling circuit includes a seventh diode and a capacitor; the anode of the seventh diode is respectively connected to one end of the capacitor and one end of the corresponding brake coil, and the cathode is respectively connected to the other end of the capacitor and the other end of the corresponding brake coil.

6. A braking control method, characterized in that: Applied to the elevator braking device according to any one of claims 1 to 5, the method comprises the steps of: In the event of a power failure in the grid, any brake will be driven to perform braking action; After a preset time interval, another brake is driven to perform a braking action to complete the current drive and the number of drives is updated; The driving times are accumulated until each of the brakes completes the braking action.

7. A brake control device, characterized in that: Applicable to the elevator braking device according to any one of claims 1 to 5, the device comprising: The first driving module is used to drive any brake to perform braking action when the grid power fails; The second driving module is used to drive another brake to perform a braking action after a preset time interval to complete the current driving and update the driving number; The accumulation module is used to accumulate the driving times until all the brakes complete the braking action.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 6 are implemented.

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