CN108169671B - Method and device for predicting service life times of contactor in elevator and computer equipment - Google Patents
Method and device for predicting service life times of contactor in elevator and computer equipment Download PDFInfo
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- CN108169671B CN108169671B CN201810114116.6A CN201810114116A CN108169671B CN 108169671 B CN108169671 B CN 108169671B CN 201810114116 A CN201810114116 A CN 201810114116A CN 108169671 B CN108169671 B CN 108169671B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The application relates to a method and a system for predicting the service life times of a contactor in an elevator, computer equipment and a storage medium. The method comprises the following steps: 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 through the corresponding relation between the electrical parameters, the actions and the electrical parameters under the actions and the service life times, 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; and 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. By adopting the method, the existing devices in the elevator can be utilized, the service life times of the contactor can be predicted without increasing the cost, and the realization of the function can not influence the normal operation of a control system.
Description
Technical Field
The application relates to the technical field of electricians, in particular to a method and a device for predicting the service life times of a contactor in an elevator, computer equipment and a storage medium.
Background
Along with the development of electrician technology, control systems appear, particularly in elevator control systems, the service life times of contactors are not predicted, and the service life times of contactors are usually predicted through external service life testing equipment or systems.
However, predicting the number of times of life of the contactor by an external life test device or system does not allow timely feedback of information at the time of switching of the contactor state.
Disclosure of Invention
Therefore, in order to solve the technical problems, a method, a device, a computer device and a storage medium for predicting the service life times of the contactor in the elevator can be realized by using the existing devices in the elevator without adding other detection devices.
A method for predicting the service life times of a contactor in an elevator comprises the following steps:
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 first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current 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;
and 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.
In one embodiment, the electrical parameters comprise current and voltage, and the obtaining of the voltage at the time of the state switching of the contactor in the elevator by the electrical parameter measuring device in the elevator comprises:
detecting the direct current bus voltage of a frequency converter in an elevator;
and calculating to obtain the voltage when the contactor state is switched according to the direct current bus voltage.
In one embodiment, obtaining the second electrical loss comprises:
recording first electrical loss corresponding to each action of the contactor before the current action;
and accumulating the first electric loss of each time to obtain a second electric loss.
In one embodiment, the method further comprises the following steps:
acquiring the action times of the contactor;
predicting the number of mechanical life times of the contactor.
In one embodiment, the method further comprises the following steps:
and when the electrical service life times reach the electrical service life time warning value or when the mechanical service life times reach the mechanical service life time warning value, sending parameter information of the contactor.
An elevator contactor life time number prediction device, comprising:
the electrical parameter module is used for acquiring electrical parameters when the state of a contactor in the elevator is switched through an electrical parameter measuring device in the elevator;
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 parameter action and the corresponding relation between the electrical parameter under the current action and the service life times, wherein the first electrical loss is the electrical loss when the current state is switched;
the second loss module is used for acquiring second electrical loss, and the second electrical loss is accumulated electrical loss before the current state switching;
and the electrical prediction module is used for 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.
In one embodiment, the method further comprises the following steps:
and the mechanical prediction module is used for acquiring the action times of the contactor and predicting the mechanical service life times of the contactor.
In one embodiment, the method further comprises the following steps:
and the alarm module is used for sending the parameter information of the contactor when the electrical service life times reach the electrical service life time warning value or when the mechanical service life times reach the mechanical service life time warning value.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
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 first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current 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;
and 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.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
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 first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current 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;
and 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.
According to the method, the device, the computer equipment and the storage medium for predicting the service life times of the contactor in the elevator, whether the current action of the contactor is on or off is identified, the corresponding relation between the electrical parameters and the service life times of the contactor under different actions is combined, the first electrical loss of the contactor under the current action is calculated through the acquired electrical parameters during state switching of the contactor, and finally the electrical service life times of the contactor under different actions and electrical parameters are predicted according to the second electrical loss during state switching before the current action and the first electrical loss of the contactor under the current state. The application can make full use of the existing devices in the elevator control system, the service life times of the contactor can be predicted without increasing the cost, and the normal operation of the control system cannot be influenced by the realization of the function.
Drawings
FIG. 1 is a diagram of an embodiment of an application environment of a method for predicting the number of times of life of a contactor in an elevator;
fig. 2 is a schematic flow chart of a method for predicting the number of times of life of a contactor in an elevator according to an embodiment;
fig. 3 is a block diagram showing a life number predicting device of a contactor in an elevator according to an embodiment;
fig. 4 is a block diagram showing a life number predicting apparatus for a contactor in an elevator according to another embodiment;
FIG. 5 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for predicting the number of times of the service life of the contactor in the elevator can be applied to the application environment shown in figure 1. Wherein the terminal 102 communicates with the server 104 via a network. The terminal 102 obtains the electrical parameters when the state of the contactor in the elevator is switched through an electrical parameter measuring device in the elevator; identifying actions of the contactor during state switching, wherein the actions comprise closing and opening; obtaining first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current 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; and 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 terminal 102 sends the predicted number of electrical lifetimes of the contactor under different operational or electrical parameters to the server 104. The terminal 102 may be, but is 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 a plurality of servers.
In one embodiment, as shown in fig. 2, there is provided a method for predicting the number of times of life of a contactor in an elevator, which is described by taking the method as an example applied to a computer in fig. 1, and comprises the following steps:
s202: and acquiring the electrical parameters when the state of the contactor in the elevator is switched by an electrical parameter measuring device in the elevator.
The electrical parameters when the contactor state is switched comprise voltage and current, the electrical parameter measuring device in the elevator can be a sensor, a sampling resistor and the like in an elevator running condition system or an elevator self-checking system, and the voltage when the contactor state is switched can be directly detected according to an elevator control cabinet.
S204: and identifying actions of the contactor during state switching, wherein the actions comprise closing and opening.
The contactor closing action is that the contactor is switched from an open state to a contact state, and the contactor opening action is that the contactor is switched from the contact state to the open state.
S206: and obtaining a first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current action, wherein the first electrical loss is the electrical loss when the current state is switched.
And comparing the corresponding relation between the electrical parameters and the service life times, and obtaining the electrical loss of the current action through the electrical parameters obtained in the previous two steps and the identified action, namely the first electrical loss.
Specifically, the correspondence between the electrical parameter and the number of lifetime is a plurality of sets of correspondence in which the number of lifetime changes with the change of current under different actions and different voltages. When the current action is closing, the corresponding life times can be obtained according to the obtained current, voltage and the corresponding relation between the electrical parameters and the life times under the closing action, the obtained life times are the voltage, the current and the life times M of the contactor when the contactor is closing, and the electrical loss when the current state is switched is 1/M. When the current action is disconnection, the corresponding service life times can be obtained according to the obtained current, voltage and the corresponding relation between the electrical parameters under the disconnection action and the service life times, the obtained service life times are the voltage, the current and the service life times N of the contactor when the contactor is disconnected, and the electrical loss when the current state is switched is 1/N.
S208: and acquiring a second electrical loss, wherein 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 Tth action, the 1 st action to the T-1 th action of the contactor are actions before the current state switching of the contactor, and the second electrical loss is the electrical loss accumulated before the current state switching, namely the sum of the electrical losses of the contactor at the 1 st action to the T-1 th state switching.
S210: and 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.
And obtaining the residual available electrical loss of the contactor according to the obtained first electrical loss and the accumulated second electrical loss, and obtaining the electrical service life times under different actions by contrasting the corresponding relation between the electrical parameters and the service life times under different actions.
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 life times of the contactor under the closing action under the specific current and the specific voltage are predicted by contrasting the corresponding relation between the electrical parameters and the life times under the closing action under the specific current and the specific voltage. And predicting the number of electrical service lives of the contactor under the opening action of the contactor under the specific current and the specific voltage by contrasting the corresponding relation between the electrical parameters and the number of service lives under the specific current and the specific voltage under the opening action.
In the embodiment, the current action of the contactor is identified to be closed or opened, the corresponding relation between the electrical parameters and the service life times of the contactor under different actions is combined, the first electrical loss of the contactor under the current action is calculated through the acquired electrical parameters when the state of the contactor is switched, and finally the electrical service life times of the contactor under different actions and electrical parameters are predicted according to the second electrical loss switched in the state before the current action and the first electrical loss of the contactor under the current state. The existing devices in the elevator control system can be fully utilized, the service life times of the contactor can be predicted without increasing the cost, and the normal operation of the control system cannot be influenced by the realization of the function.
In one embodiment, the electrical parameters comprise current and voltage, and the obtaining of the voltage at the time of the state switching of the contactor in the elevator by the electrical parameter measuring device in the elevator comprises: detecting the direct current bus voltage of a frequency converter in an elevator; and calculating to obtain the voltage when the contactor state is switched according to the direct current bus voltage.
The voltage measurement can be obtained by direct detection according to the actual conditions of the elevator control cabinet or by calculation by detecting the direct-current bus voltage of a frequency converter in the elevator. The measurement of the current may use a sampling resistor, a sensor, etc. The sensor may be a hall sensor or the like. Parameters required by the prediction of the number of times of the service life of the contactor can be directly measured by a measuring device in the elevator, and the number of times of the service life of the contactor can be predicted without adding an external device.
In one embodiment, obtaining the second electrical loss comprises: recording first electrical loss corresponding to each action of the contactor before the current action; and accumulating the first electric loss of each time to obtain a second electric loss.
The first electric loss of each action of the contactor before the current action is recorded in the database, and each first electric loss is accumulated afterwards to obtain the second electric loss of the contactor before the current action.
In one embodiment, the method further comprises the following steps: acquiring the action times of the contactor; predicting the number of mechanical life times of the contactor.
The mechanical life times are the mechanical wear resistance of the contactor and can be characterized by the action times of the contactor. And predicting the mechanical life times of the contactor by acquiring the sum of the closing times and the opening times of the contactor.
In one embodiment, the method further comprises the following steps: and when the electrical service life times reach the electrical service life time warning value or when the mechanical service life times reach the mechanical service life time warning value, sending parameter information of the contactor.
The service life times of the contactor comprise electrical service life times and mechanical service life times, and when the electrical service life times reach an electrical service life time warning value, the parameter information of the contactor is sent to an elevator control panel; when the mechanical life times reach the mechanical life time warning value, parameter information of the contactor is sent to the elevator control panel, and the parameter information comprises the model, the number and the like of the contactor. Maintenance personnel can know information such as the model and the serial number of the contactor by checking parameter information of the elevator control panel for maintenance or replacement.
In one embodiment, the current and the voltage of the contactor during the state switching of the contactor are obtained by 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. It is identified whether the contactor is open or closed.
When the contactor is disconnected, obtaining the current voltage, the current and the service life times X of the contactor under the disconnection action according to the obtained voltage, the current and the corresponding relation between the power-off parameters and the service life times of the contactor, wherein the electrical loss during the current state switching is 1/X, the electrical loss of each action accumulated before the current state switching is obtained, and if the current action is performed twice, the first electrical loss is 1/A, the second electrical loss is 1/B, and the second electrical loss is 1/A + 1/B. And obtaining the remaining available electric loss of 1-1/X- (1/A +1/B) according to the first electric loss and the second electric loss obtained by calculation. When the contactor is disconnected, obtaining the current voltage, the current and the service life times Y of the contactor under the disconnection action according to the obtained voltage, the current and the corresponding relation between the power-off parameters and the service life times of the contactor, wherein the electrical loss during the current state switching is 1/Y, the electrical loss of each action accumulated before the current state switching is obtained, and if the current action is performed twice, the first electrical loss is 1/C, the second electrical loss is 1/D, and the second electrical loss is 1/C + 1/D. And obtaining the remaining available electric loss of 1-1/Y- (1/C +1/D) according to the first electric loss and the second electric loss obtained by calculation.
And predicting the specific current and the electric service life times of the contactor under the opening action according to the residual available electric loss and by comparing the corresponding relation between the electric parameters and the service life times under the specific current and the specific voltage under the opening action, and transmitting the predicted electric service life times and the corresponding current, voltage and action types to the elevator control panel in real time. And when the residual available electrical loss reaches the warning value, sending parameter information of the contactor to the elevator control panel, wherein the parameter information comprises the model, the number and the like of the contactor. Maintenance personnel can know information such as the model and the serial number of the contactor by checking parameter information of the elevator control panel for maintenance or replacement.
In the embodiment, the current action of the contactor is identified to be closed or opened, the corresponding relation between the electrical parameters and the service life times of the contactor under different actions is combined, the first electrical loss of the contactor under the current action is calculated through the acquired electrical parameters when the state of the contactor is switched, and finally the electrical service life times of the contactor under different actions and electrical parameters are predicted according to the second electrical loss switched in the state before the current action and the first electrical loss of the contactor under the current state. The existing devices in the elevator control system can be fully utilized, the service life times of the contactor can be predicted without increasing the cost, and the normal operation of the control system cannot be influenced by the realization of the function. When the electrical service life reaches the warning value, the parameter information such as the signal and the serial number of the contactor is sent to the elevator control cabinet, and maintenance personnel can know the information such as the model and the serial number of the contactor by looking up the parameter information of the elevator control panel for maintenance or replacement.
It should be understood that, although the steps in the flowchart of fig. 2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 2 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 3, there is provided an elevator contactor life time prediction apparatus comprising 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, wherein:
and the electrical parameter module 302 is used for acquiring electrical parameters when the state of the contactor in the elevator is switched by an electrical parameter measuring device in the elevator.
And an action module 304 for identifying actions of the contactor during state switching, wherein the actions comprise closing and opening.
The first loss module 306 is configured to obtain a first electrical loss according to the electrical parameter action and the corresponding relationship between the electrical parameter and the life time under the current action, where the first electrical loss is an electrical loss when the current state is switched.
The second loss module 308 is configured to obtain a second electrical loss, where the second electrical loss is an electrical loss that has been accumulated before the current state switching.
And an electrical prediction module 310, 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 parameter module 302 is used to obtain an electrical parameter when the state of the contactor is switched, the action module 304 is used to identify an action of the contactor during the state switching, where the action includes closing and opening, and the first electrical loss is obtained by the first loss module 306 according to the electrical parameter obtained by the electrical parameter module 302, the action identified by the action module 304, and a corresponding relationship between the electrical parameter and the life time in the current action, where the first electrical loss is an electrical loss in the current state switching. The second electrical loss is obtained by the second loss module 308 as the electrical loss accumulated before the current state switching. The electrical life times of the contactor under different actions and electrical parameters are predicted through the electrical prediction module 310 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 relation between the electrical parameters and the life times under different actions. The existing devices in the elevator control system can be fully utilized, the service life times of the contactor can be predicted without increasing the cost, and the normal operation of the control system cannot be influenced by the realization of the function.
In one embodiment, as shown in fig. 4, the device for predicting the number of times of life of the contactor in the elevator further comprises a mechanical prediction module 402 and an alarm module 404:
and a mechanical prediction module 402, configured to obtain the number of times of actions of the contactor and predict the number of times of mechanical life of the contactor.
And the alarm module 404 is configured to send the parameter information of the contactor when the number of electrical lifetimes reaches the electrical lifetime number alert value, or when the number of mechanical lifetimes reaches the mechanical lifetime number alert value.
In this embodiment, the mechanical prediction module 402 can predict the mechanical life times of the contactor by acquiring the action times of the contactor, and the alarm module 404 sends the parameter information of the contactor to the elevator control panel when the electrical life times reach the electrical life time alarm value; when the mechanical life times reach the mechanical life time warning value, parameter information of the contactor is sent to the elevator control panel, and the parameter information comprises the model, the number and the like of the contactor. Maintenance personnel can know information such as the model and the serial number of the contactor by checking parameter information of the elevator control panel for maintenance or replacement.
For the specific definition of the device for predicting the number of times of life of the contactor in the elevator, reference may be made to the above definition of the method for predicting the number of times of life of the contactor in the elevator, and details are not described here. All or part of the modules in the device for predicting the service life times of the contactor in the elevator can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 5. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method for predicting the number of times the life of a contactor in an elevator. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 5 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
and acquiring the electrical parameters when the state of the contactor in the elevator is switched by an electrical parameter measuring device in the elevator.
And identifying actions of the contactor during state switching, wherein the actions comprise closing and opening.
And obtaining a first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current action, wherein the first electrical loss is the electrical loss when the current state is switched.
And acquiring a second electrical loss, wherein the second electrical loss is the electrical loss accumulated before the current state switching.
And 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.
In one embodiment, the processor, when executing the computer program, further performs the steps of: detecting the direct current bus voltage of a frequency converter in an elevator; and calculating to obtain the voltage when the contactor state is switched according to the direct current bus voltage.
In one embodiment, the processor, when executing the computer program, further performs the steps of: recording first electrical loss corresponding to each action of the contactor before the current action; and accumulating the first electric loss of each time to obtain a second electric loss.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring the action times of the contactor; predicting the number of mechanical life times of the contactor.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and when the electrical service life times reach the electrical service life time warning value or when the mechanical service life times reach the mechanical service life time warning value, sending parameter information of the contactor.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
and acquiring the electrical parameters when the state of the contactor in the elevator is switched by an electrical parameter measuring device in the elevator.
And identifying actions of the contactor during state switching, wherein the actions comprise closing and opening.
And obtaining a first electrical loss according to the electrical parameters, the action and the corresponding relation between the electrical parameters and the service life times under the current action, wherein the first electrical loss is the electrical loss when the current state is switched.
And acquiring a second electrical loss, wherein the second electrical loss is the electrical loss accumulated before the current state switching.
And 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.
In one embodiment, the computer program when executed by the processor further performs the steps of: detecting the direct current bus voltage of a frequency converter in an elevator; and calculating to obtain the voltage when the contactor state is switched according to the direct current bus voltage.
In one embodiment, the computer program when executed by the processor further performs the steps of: recording a first electrical loss of each action of the contactor before the current action; and accumulating the first electric losses at each time to obtain a second electric loss.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the action times of the contactor; predicting the number of mechanical life times of the contactor.
In one embodiment, the computer program when executed by the processor further performs the steps of: and when the electrical service life times reach the electrical service life time warning value or when the mechanical service life times reach the mechanical service life time warning value, sending parameter information of the contactor.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. 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 a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent 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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| CN111222782A (en) * | 2019-12-31 | 2020-06-02 | 北汽福田汽车股份有限公司 | Relay life acquisition method and device, storage medium, electronic device and vehicle |
| CN111736098B (en) * | 2020-07-23 | 2024-07-09 | 上海市特种设备监督检验技术研究院 | Online risk monitoring system and method for electrical elements of electromechanical special equipment |
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