CN108169671B - Method, device and computer equipment for predicting the life time of contactors in elevators - Google Patents

Abstract

The present application relates to a method, system, computer equipment and storage medium for predicting the life time of a contactor in an elevator. Including: obtaining the electrical parameters of the contactor in the elevator when the state is switched through the electrical parameter measuring device in the elevator; identifying the action of the contactor when the state is switched, the actions include closing and opening; the electrical parameters, actions, and electrical parameters under the action are related to the action. The corresponding relationship between the life times, obtain the first electrical loss, the first electrical loss is the electrical loss during the current state switching; obtain the second electrical loss, the second electrical loss is the accumulated electrical loss before the current state switching; according to the first electrical loss The first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, predict the electrical life times of the contactor under different actions and electrical parameters. By adopting the method, the existing devices in the elevator can be used, and the life-time prediction of the contactor can be realized without increasing the cost, and the realization of the function will not affect the normal operation of the control system.

Description

Method, device and computer equipment for predicting the life time of contactors in elevators

technical field

The present application relates to the field of electrical technology, and in particular, to a method, device, computer equipment and storage medium for predicting the life time of a contactor in an elevator.

Background technique

With the development of electrical technology, a control system has appeared. Especially in the elevator control system, the life time prediction of the contactor is not carried out by itself.

However, predicting the life times of a contactor through an external life testing device or system cannot feed back the information when the state of the contactor is switched in time.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a method, device, computer equipment and storage medium for predicting the life time of a contactor in an elevator without adding other detection devices and using existing devices in the elevator.

A method for predicting the life time of a contactor in an elevator, comprising:

Obtain the electrical parameters when the state of the contactor in the elevator is switched through the electrical parameter measuring device in the elevator;

Identify the action of the contactor when the state is switched, the action includes closing and opening;

Obtain the first electrical loss according to the electrical parameter, the action, and the corresponding relationship between the electrical parameter under the current action and the number of lifetimes, and the first electrical loss is the electrical loss during the current state switching;

Obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch;

According to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical life times of the contactor under different actions and electrical parameters are predicted.

In one of the embodiments, the electrical parameters include current and voltage, and through the electrical parameter measuring device in the elevator, obtaining the voltage when the state of the contactor in the elevator is switched includes:

Detect the DC bus voltage of the inverter in the elevator;

According to the DC bus voltage, the voltage when the state of the contactor is switched is calculated.

In one of the embodiments, obtaining the second electrical loss includes:

Record the first electrical loss corresponding to each action of the contactor before the current action;

Accumulate the first electrical loss each time to obtain the second electrical loss.

In one embodiment, it also includes:

Get the number of actions of the contactor;

Predict the number of mechanical lifetimes of contactors.

In one embodiment, it also includes:

When the electrical life times reach the warning value of the electrical life times, or when the mechanical life times reach the warning value of the mechanical life times, the parameter information of the contactor is sent.

A device for predicting the life times of a contactor in an elevator, comprising:

The electrical parameter module is used to obtain the electrical parameters of the contactor state switching in the elevator through the electrical parameter measuring device in the elevator;

The action module is used to identify the action of the contactor when the state is switched, and the action includes closing and opening;

The first loss module is used to obtain the first electrical loss according to the electrical parameter action and the corresponding relationship between the electrical parameter and the life times under the current action, and the first electrical loss is the electrical loss during the current state switching;

The second loss module is used to obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch;

The electrical prediction module is used to predict the electrical life times of the contactor under different actions and electrical parameters according to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions.

In one embodiment, it also includes:

The mechanical prediction module is used to obtain the number of actions of the contactor and predict the mechanical life of the contactor.

In one embodiment, it also includes:

The alarm module is used to send the parameter information of the contactor when the number of electrical lifetimes reaches the warning value of the number of electrical lifetimes, or when the number of mechanical lifetimes reaches the warning value of the number of mechanical lifetimes.

A computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

Obtain the electrical parameters when the state of the contactor in the elevator is switched through the electrical parameter measuring device in the elevator;

Identify the action of the contactor when the state is switched, the action includes closing and opening;

Obtain the first electrical loss according to the electrical parameter, the action, and the corresponding relationship between the electrical parameter under the current action and the number of lifetimes, and the first electrical loss is the electrical loss during the current state switching;

Obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch;

According to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical life times of the contactor under different actions and electrical parameters are predicted.

A computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Obtain the electrical parameters when the state of the contactor in the elevator is switched through the electrical parameter measuring device in the elevator;

Identify the action of the contactor when the state is switched, the action includes closing and opening;

Obtain the first electrical loss according to the electrical parameter, the action, and the corresponding relationship between the electrical parameter under the current action and the number of lifetimes, and the first electrical loss is the electrical loss during the current state switching;

Obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch;

According to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical life times of the contactor under different actions and electrical parameters are predicted.

The above-mentioned method, device, computer equipment and storage medium for predicting the life time of a contactor in an elevator, by identifying whether the current action of the contactor is closed or open, combined with the corresponding relationship between the electrical parameters and the life times of the contactor under different actions, through the obtained contactor. The electrical parameters of the contactor when the state is switched, calculate the first electrical loss of the contactor under the current action, and finally predict the second electrical loss of the contactor before the current action and the first electrical loss of the contactor in the current state. The electrical life times of the contactor under different actions and electrical parameters. The present application can make full use of the existing devices in the elevator control system, and can realize the prediction of the life time of the contactor without increasing the cost, and the realization of this function will not affect the normal operation of the control system.

Description of drawings

1 is an application environment diagram of a method for predicting the life times of a contactor in an elevator in one embodiment;

2 is a schematic flowchart of a method for predicting the lifespan of a contactor in an elevator in one embodiment;

Fig. 3 is a structural block diagram of a device for predicting the life times of a contactor in an elevator in one embodiment;

4 is a structural block diagram of a device for predicting the lifespan of a contactor in an elevator in another embodiment;

FIG. 5 is a diagram of the internal structure of a computer device in one embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

The method for predicting the life time of a contactor in an elevator provided by the present application can be applied to the application environment shown in FIG. 1 . The terminal 102 communicates with the server 104 through the network through the network. The terminal 102 obtains the electrical parameters when the state of the contactor in the elevator is switched through the electrical parameter measuring device in the elevator; recognizes the action of the contactor when the state is switched, and the actions include closing and opening; The corresponding relationship between the parameters and the life times, obtain the first electrical loss, the first electrical loss is the electrical loss during the current state switching; obtain the second electrical loss, the second electrical loss is the accumulated electrical loss before the current state switching; According to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical life times of the contactor under different actions and electrical parameters are predicted. The terminal 102 sends the predicted electrical life times of the contactor under different actions or electrical parameters to the server 104 . The terminal 102 may be, but not limited to, various personal computers and notebook computers, and the server 104 may be implemented by an independent server or a server cluster composed of multiple servers.

In one embodiment, as shown in FIG. 2 , a method for predicting the lifespan of a contactor in an elevator is provided, and the method is applied to the computer in FIG. 1 as an example to illustrate, including the following steps:

S202: Obtain the electrical parameters when the state of the contactor in the elevator is switched through the electrical parameter measuring device in the elevator.

Among them, the electrical parameters during the state switching of the contactor include voltage and current. The electrical parameter measuring device in the elevator can be a sensor, sampling resistor, etc. in the elevator operating condition system or the elevator self-checking system. The voltage is directly detected according to the elevator control cabinet.

S204: Identify the action of the contactor when the state is switched, and the action includes closing and opening.

The contactor closing action means that the contactor switches from the breaking state to the contacting state, and the contactor opening action means that the contactor switches from the contacting state to the breaking state.

S206: Obtain a first electrical loss according to the electrical parameter, the action, and the corresponding relationship between the electrical parameter under the current action and the life times, and the first electrical loss is the electrical loss during the current state switching.

Wherein, according to the corresponding relationship between the electrical parameters and the number of lifetimes, through the electrical parameters obtained in the first two steps and the identified actions, the electrical loss of the current action can be obtained, which is the first electrical loss.

Specifically, the corresponding relationship between the electrical parameters and the number of lifetimes is a plurality of sets of corresponding relationships in which the number of lifetimes changes with current changes under different actions and different voltages. When the current action is closed, the corresponding life times can be obtained according to the obtained current, voltage and the corresponding relationship between the electrical parameters and the life times under the closing action. The obtained life times at this time are the contacts at this voltage, current and closing If the life time of the device is M, then the electrical loss during the current state switching is 1/M. When the current operation is disconnection, the corresponding life times can be obtained according to the obtained current, voltage and the corresponding relationship between the electrical parameters and the life times under the disconnection action. If the number of lifespan of the contactor is N, then the electrical loss during the current state switching is 1/N.

S208: Obtain the second electrical loss, where the second electrical loss is the electrical loss accumulated before the current state switching.

For example, when the current action of the contactor is the T-th action, then the first to T-1 actions of the contactor are the actions before the current state switching of the contactor, and the second electrical loss is the current state switching. The electrical loss that has been accumulated before, that is, the sum of the electrical losses when the contactor switches from the 1st to the T-1th state.

S210: Predict the electrical life times of the contactor under different actions and electrical parameters according to the first electrical loss, the second electrical loss, and the corresponding relationship between the electrical parameters and the life times under different actions.

Among them, according to the obtained first electrical loss and the accumulated second electrical loss, the remaining available electrical loss of the contactor can be obtained, and the corresponding relationship between the electrical parameters and the life times under different actions can be obtained under different actions. Electrical life times.

Specifically, according to the obtained first electrical loss and the second electrical loss obtained after accumulation in the database, the remaining available electrical loss of the contactor can be obtained, and the electrical parameters and life of the contactor can be compared with the specific current and the specific voltage under the closing action. The corresponding relationship of the times predicts the electrical life times of the contactor under a specific current and a specific voltage under the closing action. According to the obtained first electrical loss and the second electrical loss obtained after accumulating in the database, the remaining available electrical loss of the contactor can be obtained, which can be compared with the electrical parameters and life times under the specific current and specific voltage under the disconnection action. Corresponding relationship, predict the electrical life times of the contactor under a specific current and a specific voltage under the breaking action.

In this embodiment, by identifying whether the current action of the contactor is closed or open, and combining the corresponding relationship between the electrical parameters and the life times of the contactor under different actions, the current electrical parameters of the contactor when the state is switched are obtained to calculate the current The first electrical loss of the contactor under the next action, and finally predict the electrical life times of the contactor under different actions and electrical parameters according to the second electrical loss of the state switching before the current action and the first electrical loss of the contactor in the current state . The existing devices in the elevator control system can be fully utilized, and the life time prediction of the contactor can be realized without increasing the cost, and the realization of this function will not affect the normal operation of the control system.

In one of the embodiments, the electrical parameters include current and voltage. Using the electrical parameter measuring device in the elevator, obtaining the voltage when the state of the contactor in the elevator is switched includes: detecting the DC bus voltage of the inverter in the elevator; according to the DC bus voltage, Calculate the voltage when the state of the contactor is switched.

The voltage measurement can be directly detected according to the actual conditions of the elevator control cabinet, or calculated by detecting the DC bus voltage of the inverter in the elevator. The measurement of the current can use a sampling resistor, a sensor, or the like. The sensor may be a Hall sensor or the like. Through the measuring device in the elevator, the parameters required for the prediction of the contactor life time can be directly measured, and the life time prediction of the contactor can be carried out without adding external devices.

In one embodiment, obtaining the second electrical loss includes: recording the first electrical loss corresponding to each action of the contactor before the current action; and accumulating the first electrical loss each time to obtain the second electrical loss.

The first electrical loss of the contactor in each action before the current action is recorded in the database, and then each first electrical loss is accumulated to obtain the second electrical loss of the contactor before the current action.

In one of the embodiments, the method further includes: acquiring the number of actions of the contactor; and predicting the number of mechanical lifetimes of the contactor.

The number of mechanical life is the mechanical wear resistance of the contactor, which can be characterized by the number of actions of the contactor. By obtaining the sum of the closing and opening times of the contactor, the mechanical life of the contactor is predicted.

In one embodiment, the method further includes: when the number of electrical lifetimes reaches the warning value of the number of electrical lifetimes, or when the number of mechanical lifetimes reaches the warning value of the number of mechanical lifetimes, sending parameter information of the contactor.

The life times of the contactor include the electrical life times and the mechanical life times. When the electrical life times reach the warning value of the electrical life times, the parameter information of the contactor will be sent to the elevator control panel; when the mechanical life times reach the warning value of the mechanical life times, it will also be The parameter information of the contactor will be sent to the elevator control panel, and the parameter information includes the model and number of the contactor. Maintenance personnel can learn the model and number of the contactor by viewing the parameter information of the elevator control panel, and repair or replace it.

In one embodiment, the current of the contactor is detected by the Hall sensor in the elevator, and the voltage of the contactor is directly detected by the elevator control cabinet to obtain the current and voltage when the state of the contactor is switched. Identify whether the contactor is open or closed.

When the contactor is disconnected, according to the obtained voltage, current, and the corresponding relationship between the disconnection parameters and the life times of the contactor, the current voltage, current and life times X of the contactor under the disconnection action are obtained, then the current state The electrical loss during switching is 1/X, and the electrical loss of each action accumulated before the current state switch is obtained. Assuming that the previous state has been operated twice, the electrical loss of the first time is 1/A, and the electrical loss of the second time is 1/A. is 1/B, then the second electrical loss is 1/A+1/B. According to the calculated first electrical loss and second electrical loss, the remaining available electrical loss can be obtained as 1-1/X-(1/A+1/B). When the contactor is disconnected, according to the obtained voltage, current and the corresponding relationship between the disconnection parameters and the life times of the contactor, the current voltage, current and the life times Y of the contactor under disconnection action are obtained, then the current state The electrical loss during switching is 1/Y, and the electrical loss of each action accumulated before the current state switch is obtained. Assuming that there have been two actions before, the electrical loss of the first time is 1/C, and the electrical loss of the second time is 1/C. is 1/D, then the second electrical loss is 1/C+1/D. According to the calculated first electrical loss and the second electrical loss, the remaining available electrical loss can be obtained as 1-1/Y-(1/C+1/D).

According to the remaining available electrical loss, the corresponding relationship between the electrical parameters and the life times of the specific current and the specific voltage under the breaking action is compared, and the electrical life times of the contactor under the specific current and the specific voltage under the breaking action are predicted. Send the predicted electrical life times and corresponding current, voltage and action type to the elevator control panel in real time. When the remaining available electrical loss reaches the warning value, the parameter information of the contactor is sent to the elevator control panel, and the parameter information includes the model and number of the contactor. Maintenance personnel can learn the model and number of the contactor by viewing the parameter information of the elevator control panel, and repair or replace it.

In this embodiment, by identifying whether the current action of the contactor is closed or open, and combining the corresponding relationship between the electrical parameters and the life times of the contactor under different actions, the current electrical parameters of the contactor when the state is switched are obtained to calculate the current The first electrical loss of the contactor under the next action, and finally predict the electrical life times of the contactor under different actions and electrical parameters according to the second electrical loss of the state switching before the current action and the first electrical loss of the contactor in the current state . The existing devices in the elevator control system can be fully utilized, and the life time prediction of the contactor can be realized without increasing the cost, and the realization of this function will not affect the normal operation of the control system. When the electrical life reaches the warning value, the parameter information such as the signal and serial number of the contactor will be sent to the elevator control cabinet. replace.

It should be understood that although the various steps in the flowchart of FIG. 2 are shown in sequence according to the arrows, these steps are not necessarily executed in the sequence shown by the arrows. Unless explicitly stated herein, the execution of these steps is not strictly limited to the order, and these steps may be performed in other orders. Moreover, at least a part of the steps in FIG. 2 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed and completed at the same time, but may be executed at different times. The execution of these sub-steps or stages The sequence is also not necessarily sequential, but may be performed alternately or alternately with other steps or sub-steps of other steps or at least a portion of a phase.

In one embodiment, as shown in FIG. 3 , a device for predicting the lifetime of a contactor in an elevator is provided, including an electrical parameter module 302 , an action module 304 , a first loss module 306 , a second loss module 308 and an electrical prediction module 310, of which:

The electrical parameter module 302 is used to obtain electrical parameters of the contactor in the elevator when the state is switched through the electrical parameter measuring device in the elevator.

The action module 304 is used to identify the action of the contactor when the state is switched, and the action includes closing and opening.

The first loss module 306 is configured to obtain the first electrical loss according to the electrical parameter action and the corresponding relationship between the electrical parameter and the life times under the current action, and the first electrical loss is the electrical loss during the current state switching.

The second loss module 308 is configured to obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch.

The electrical prediction module 310 is configured to predict the electrical life times of the contactor under different actions and electrical parameters according to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions.

In this embodiment, the electrical parameters of the contactor during state switching are obtained through the electrical parameter module 302 , and the actions of the contactor during state switching are identified through the action module 304 , and the actions include closing and opening. Parameters, actions recognized by the action module 304 and the corresponding relationship between the electrical parameters and the life times under the current action, the first electrical loss is obtained through the first loss module 306, and the first electrical loss is the electrical loss at the current state switching. The accumulated electrical loss before the current state switch is acquired through the second loss module 308 as the second electrical loss. According to the first electrical loss obtained by the first loss module 306, the second electrical loss obtained by the second loss module 308, and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical prediction module 310 predicts the contactor under different actions and times. Number of electrical lifetimes under electrical parameters. The existing devices in the elevator control system can be fully utilized, and the life time prediction of the contactor can be realized without increasing the cost, and the realization of this function will not affect the normal operation of the control system.

In one embodiment, as shown in FIG. 4 , the device for predicting the life times of a contactor in an elevator further includes a mechanical prediction module 402 and an alarm module 404:

The mechanical prediction module 402 is configured to acquire the number of actions of the contactor and predict the number of mechanical lifetimes of the contactor.

The alarm module 404 is configured to send parameter information of the contactor when the number of electrical lifetimes reaches the warning value of the number of electrical lifetimes, or when the number of mechanical lifetimes reaches the warning value of the number of mechanical lifetimes.

In this embodiment, the mechanical prediction module 402 can obtain the contactor's action times to predict the mechanical life times of the contactor, and the alarm module 404 realizes that when the electrical life times reaches the warning value of the electrical life times, a message is sent to the elevator control panel. The parameter information of the contactor; when the mechanical life times reaches the warning value of the mechanical life times, the parameter information of the contactor will also be sent to the elevator control panel, and the parameter information includes the model and serial number of the contactor. Maintenance personnel can learn the model and number of the contactor by viewing the parameter information of the elevator control panel, and repair or replace it.

For the specific limitation of the device for predicting the lifespan of a contactor in an elevator, reference may be made to the above limitation on a method for predicting the lifespan of a contactor in an elevator, which will not be repeated here. Each module in the above-mentioned device for predicting the lifespan of a contactor in an elevator can be implemented in whole or in part by software, hardware and combinations thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

In one embodiment, a computer device is provided, and the computer device may be a terminal, and its internal structure diagram may be as shown in FIG. 5 . The computer equipment includes a processor, memory, a network interface, a display screen, and an input device connected by a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium, an internal memory. The nonvolatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the execution of the operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. The computer program, when executed by the processor, implements a method for predicting the lifetime of a contactor in an elevator. The display screen of the computer equipment may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment may be a touch layer covered on the display screen, or a button, a trackball or a touchpad set on the shell of the computer equipment , or an external keyboard, trackpad, or mouse.

Those skilled in the art can understand that the structure shown in FIG. 5 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer equipment to which the solution of the present application is applied. Include more or fewer components than shown in the figures, or combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Through the electrical parameter measuring device in the elevator, the electrical parameters when the state of the contactor in the elevator is switched are obtained.

Identify the action of the contactor when the state is switched, the action includes closing and opening.

The first electrical loss is obtained according to the electrical parameter, the action, and the corresponding relationship between the electrical parameter under the current action and the number of lifetimes, and the first electrical loss is the electrical loss during the current state switching.

Obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch.

According to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical life times of the contactor under different actions and electrical parameters are predicted.

In one embodiment, when the processor executes the computer program, the following steps are further implemented: detecting the DC bus voltage of the inverter in the elevator; and calculating the voltage when the state of the contactor is switched according to the DC bus voltage.

In one embodiment, the processor further implements the following steps when executing the computer program: recording the first electrical loss corresponding to each action of the contactor before the current action; accumulating the first electrical loss each time to obtain the second electrical loss .

In one embodiment, when the processor executes the computer program, the following steps are further implemented: acquiring the number of actions of the contactor; and predicting the number of mechanical lifetimes of the contactor.

In one embodiment, when the processor executes the computer program, the processor further implements the following steps: sending the parameter information of the contactor when the electrical life count reaches the electrical life count warning value, or when the mechanical life count reaches the mechanical life count warning value.

In one embodiment, a computer-readable storage medium is provided on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Through the electrical parameter measuring device in the elevator, the electrical parameters when the state of the contactor in the elevator is switched are obtained.

Identify the action of the contactor when the state is switched, the action includes closing and opening.

The first electrical loss is obtained according to the electrical parameter, the action, and the corresponding relationship between the electrical parameter under the current action and the number of lifetimes, and the first electrical loss is the electrical loss during the current state switching.

Obtain the second electrical loss, where the second electrical loss is the accumulated electrical loss before the current state switch.

According to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions, the electrical life times of the contactor under different actions and electrical parameters are predicted.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: detecting the DC bus voltage of the inverter in the elevator; and calculating the voltage when the state of the contactor is switched according to the DC bus voltage.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: recording the first electrical losses of each action of the contactor before the current action; accumulating the first electrical losses each time to obtain the second electrical losses .

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: acquiring the number of actions of the contactor; and predicting the number of mechanical lifespans of the contactor.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: when the electrical life count reaches the electrical life count warning value, or when the mechanical life count reaches the mechanical life count warning value, sending the parameter information of the contactor.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage In the medium, when the computer program is executed, it may include the processes of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other medium used in the various embodiments provided in this application may include non-volatile and/or volatile memory. Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may 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 chain Road (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features It is considered to be the range described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (10)

1. A method of predicting a number of times a contactor has a life in an elevator, the method comprising:

acquiring electrical parameters when the state of a contactor in the elevator is switched by an electrical parameter measuring device in the elevator;

identifying actions of the contactor during state switching, wherein the actions comprise closing and opening;

obtaining a first electrical loss according to the electrical parameter, the action and the corresponding relation between the electrical parameter and the service life times under the action, wherein the first electrical loss is the electrical loss when the current state is switched;

acquiring second electrical loss, wherein the second electrical loss is accumulated electrical loss before the current state switching;

predicting the electrical service life times of the contactor under different actions and electrical parameters according to the first electrical loss, the second electrical loss and the corresponding relation between the electrical parameters and the service life times under different actions;

the corresponding relation between the electrical parameter under the action and the service life times is a plurality of groups of corresponding relations, wherein the service life times change along with the current change under different actions and different voltages, and the first electrical loss is the reciprocal of the service life times determined according to the electrical parameter, the identified action and the corresponding relation between the electrical parameter under the action and the service life times;

through electrical parameter measuring device in the elevator, the electrical parameter when acquireing contactor state in the elevator and switching includes: detecting the current of a contactor through a Hall sensor in an elevator, and directly detecting the voltage of the contactor through an elevator control cabinet to obtain the current and the voltage when the state of the contactor is switched;

the predicting the electrical life times of the contactor under different actions and electrical parameters according to the first electrical loss, the second electrical loss and the corresponding relationship between the electrical parameters and the life times under different actions comprises: and predicting the electrical service life times of the contactor under the closing action under the specific current and the specific voltage according to the corresponding relation of the electrical parameters and the service life times under the specific current and the specific voltage under the opening action.

2. The method according to claim 1, characterized in that the electrical parameters comprise current and voltage, and the obtaining of the voltage at the switching of the state of the contactor in the elevator by means of an electrical parameter measuring device in the elevator comprises:

detecting the direct-current bus voltage of a frequency converter in the elevator;

and calculating to obtain the voltage when the state of the contactor is switched according to the voltage of the direct current bus.

3. The method of claim 1, wherein said obtaining a second electrical loss comprises:

recording a first electrical loss corresponding to each action of the contactor before the current action;

and accumulating the first electric losses to obtain a second electric loss.

4. The method of claim 1, further comprising:

acquiring the action times of the contactor;

predicting a number of mechanical lifetimes of the contactor.

5. The method of claim 4, further comprising:

and when the electrical service life times reach an electrical service life time warning value, or when the mechanical service life times reach a mechanical service life time warning value, sending parameter information of the contactor.

6. An elevator contactor life time number prediction device, characterized in that the device comprises:

the electrical parameter module is used for detecting the current of the contactor through a Hall sensor in the elevator and directly detecting the voltage of the contactor through an elevator control cabinet to obtain the current and the voltage when the state of the contactor is switched;

the action module is used for identifying actions of the contactor during state switching, and the actions comprise closing and opening;

the first loss module is used for obtaining first electrical loss according to the electrical parameters, the actions and the corresponding relation between the electrical parameters and the service life times under the actions, wherein the first electrical loss is the electrical loss when the current state is switched, the corresponding relation between the electrical parameters and the service life times under the actions is a plurality of groups of corresponding relations of the service life times under different actions and different voltages along with the change of current, and the first electrical loss is the reciprocal of the service life times determined according to the electrical parameters, the identified actions and the corresponding relation between the electrical parameters and the service life times under the actions;

the second loss module is used for acquiring second electrical loss, wherein the second electrical loss is accumulated electrical loss before the current state switching;

the electrical prediction module is used for obtaining the residual available electrical loss of the contactor according to the first electrical loss and the second electrical loss, predicting the electrical service life times of the contactor under the closing action and the specific voltage by contrasting the corresponding relation between the electrical parameters and the service life times under the specific current and the specific voltage under the closing action, and predicting the electrical service life times of the contactor under the opening action and the specific current and the specific voltage by contrasting the corresponding relation between the electrical parameters and the service life times under the specific current and the specific voltage under the opening action.

7. The apparatus of claim 6, further comprising:

and the mechanical prediction module is used for acquiring the action times of the contactor and predicting the mechanical life times of the contactor.

8. The apparatus of claim 7, further comprising:

and the alarm module is used for sending the parameter information of the contactor when the electrical service life times reach an electrical service life time warning value or when the mechanical service life times reach a mechanical service life time warning value.

9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 5 when executing the computer program.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.

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