阅读说明：本技术 一种接触器的寿命监测方法、装置、设备及存储介质 (Method, device and equipment for monitoring service life of contactor and storage medium ) 是由 陈�峰 唐其伟 王鹏 钟海峰 芮建彬 肖中良 于 2020-12-15 设计创作，主要内容包括：本发明公开了一种接触器的寿命监测方法、装置、设备及存储介质,本发明通过设置两个供电电路,即第一供电回路和第二供电回路为主控进行供电,当第一接触器出现故障时可以通过第一供电回路为主控进行供电,使得主控仍然可以保持正常工作的状态；而在第一工作模式下,对第一接触器进行激励处理,以确定第一接触器的第一性能参数,根据第一性能参数与第一阈值,对第二供电回路进行监控,能够在第一接触器处于非工作的状态且不影响主控正常工作的情况下,对第一接触器进行寿命检测,实现第二供电回路的监控。本发明可广泛应用于接触器技术领域。(The invention discloses a method, a device, equipment and a storage medium for monitoring the service life of a contactor, wherein two power supply circuits are arranged, namely a first power supply circuit and a second power supply circuit are used for supplying power for a master controller; and in the first working mode, the first contactor is excited to determine a first performance parameter of the first contactor, the second power supply loop is monitored according to the first performance parameter and a first threshold value, and the first contactor can be subjected to service life detection under the condition that the first contactor is in a non-working state and normal working of the master control is not influenced, so that monitoring of the second power supply loop is realized. The invention can be widely applied to the technical field of contactors.)

1. A life monitoring device of a contactor, comprising:

the first power supply loop is used for supplying power for the master control in a first working mode;

the second power supply loop is used for supplying power for the master control in a second working mode and is provided with a first contactor;

the control module comprises a first detection unit, the first detection unit is used for exciting the first contactor in the first working mode so as to determine a first performance parameter of the first contactor, and the second power supply loop is monitored according to the first performance parameter and a first threshold value; the first performance parameter is used for characterizing the service life condition of the first contactor.

2. The apparatus of claim 1, wherein: the control module further comprises a second detection unit, the first power supply loop is provided with a second contactor, and the second detection unit is used for detecting the second contactor in the first working mode, acquiring a second performance parameter of the second contactor, and monitoring the first power supply loop according to the second performance parameter and a second threshold value; the second performance parameter is used to characterize an operating condition of the second contactor.

3. A method for monitoring the life of a contactor, which is applied to the device of claim 1, comprising the steps of:

in a first working mode, exciting a first contactor to determine a first performance parameter of the first contactor; the first performance parameter is used for representing the service life condition of the first contactor;

and monitoring a second power supply loop according to the first performance parameter and the first threshold value.

4. The method of claim 3, wherein: in the first operating mode, the exciting the first contactor to determine the first performance parameter of the first contactor includes:

in a first working mode, a plurality of different frequencies and voltages are input through an excitation source to excite the first contactor; and calculating the first performance parameter according to a plurality of different frequencies and voltages.

5. The method of claim 4, wherein: the calculating the first performance parameter according to the plurality of different frequencies and voltages includes:

calculating the equivalent internal resistance and the equivalent inductive reactance of the first contactor according to a plurality of different frequencies and voltages;

determining a ratio between the equivalent internal resistance and the equivalent inductive reactance as the first performance parameter.

6. The method of claim 3, wherein: the monitoring a second power supply loop according to the first performance parameter and the first threshold value includes:

and when the first performance parameter is smaller than or equal to the first threshold value, cutting off the second power supply loop, and uploading the information of the first contactor.

7. The method of claim 3, wherein: the first power supply circuit includes a second contactor, the method further comprising:

detecting the second contactor in the first working mode to obtain a second performance parameter of the second contactor; the second performance parameter is used for representing the working condition of the second contactor;

and monitoring the first power supply loop according to the second performance parameter and a second threshold value.

8. The method of claim 7, wherein: the monitoring the first power supply loop according to the second performance parameter and a second threshold value includes:

and when the second performance parameter is larger than a first multiple of the second threshold value or smaller than a second multiple of the second threshold value, cutting off the first power supply loop, and switching the working mode from the first working mode to the second working mode.

9. An apparatus comprising a processor and a memory;

the memory stores a program;

the processor executes the program to implement the method of any one of claims 3-8.

10. A computer-readable storage medium, characterized in that the storage medium stores a program which, when executed by a processor, implements the method according to any one of claims 3-8.

Technical Field

The invention relates to the field of contactors, in particular to a method, a device, equipment and a storage medium for monitoring the service life of a contactor.

Background

With the development of science and the improvement of living standard of people, elevators are more and more appeared in the lives of people, so that the monitoring of the elevators is more and more important. Nowadays, the elevator is controlled by a main control of the elevator, the power supply of the main control is from a power-on loop, a power supply and a contactor are usually arranged in the power-on loop, and the power supply supplies power to the main control by controlling the switch and the closing of the contactor. Among the correlation technique, only one circular telegram through the power that provides for the master control on the one hand, can lead to the unable operation of elevator when contactor breaks down, and on the other hand, in order to guarantee the normal work of contactor, when carrying out life-span detection to the contactor, if detect when the contactor is worked and can lead to the fact the influence to the work of circular telegram, and if will be in the life-span detection of contactor under the non-operating condition at the contactor, then need break the circular telegram, lead to the unable operation of elevator again, consequently need design the life-span detection method of a contactor in order to solve above-mentioned problem.

Disclosure of Invention

In view of the above, in order to solve the above technical problems, the present invention provides a method, an apparatus, a device and a storage medium for monitoring the lifetime of a contactor.

The technical scheme adopted by the invention is as follows:

a life monitoring device of a contactor, comprising:

the first power supply loop is used for supplying power for the master control in a first working mode;

the second power supply loop is used for supplying power for the master control in a second working mode and is provided with a first contactor;

the control module comprises a first detection unit, the first detection unit is used for exciting the first contactor in the first working mode so as to determine a first performance parameter of the first contactor, and the second power supply loop is monitored according to the first performance parameter and a first threshold value; the first performance parameter is used for characterizing the service life condition of the first contactor.

Further, the control module further includes a second detection unit, the first power supply loop is provided with a second contactor, and the second detection unit is configured to detect the second contactor in the first working mode, acquire a second performance parameter of the second contactor, and monitor the first power supply loop according to the second performance parameter and a second threshold; the second performance parameter is used to characterize an operating condition of the second contactor.

The invention also provides a method for monitoring the service life of the contactor, which is applied to the device for monitoring the service life of the contactor and comprises the following steps:

in a first working mode, exciting a first contactor to determine a first performance parameter of the first contactor; the first performance parameter is used for representing the service life condition of the first contactor;

and monitoring a second power supply loop according to the first performance parameter and the first threshold value.

Further, in the first operation mode, the exciting the first contactor to determine the first performance parameter of the first contactor includes:

in a first working mode, a plurality of different frequencies and voltages are input through an excitation source to excite the first contactor; and calculating the first performance parameter according to a plurality of different frequencies and voltages.

Further, the calculating the first performance parameter according to the plurality of different frequencies and voltages includes:

calculating the equivalent internal resistance and the equivalent inductive reactance of the first contactor according to a plurality of different frequencies and voltages;

determining a ratio between the equivalent internal resistance and the equivalent inductive reactance as the first performance parameter.

Further, the monitoring the second power supply loop according to the first performance parameter and the first threshold includes:

and when the first performance parameter is smaller than or equal to the first threshold value, cutting off the second power supply loop, and uploading the information of the first contactor.

Further, the first power supply circuit includes a second contactor, and the method further includes:

detecting the second contactor in the first working mode to obtain a second performance parameter of the second contactor; the second performance parameter is used for representing the working condition of the second contactor;

and monitoring the first power supply loop according to the second performance parameter and a second threshold value.

Further, the monitoring the first power supply loop according to the second performance parameter and a second threshold includes:

and when the second performance parameter is larger than a first multiple of the second threshold value or smaller than a second multiple of the second threshold value, cutting off the first power supply loop, and switching the working mode from the first working mode to the second working mode.

The invention also provides a device comprising a processor and a memory;

the memory stores a program;

the processor executes the program to implement a life monitoring method of the contactor.

The present invention also provides a computer-readable storage medium storing a program which, when executed by a processor, implements a method of monitoring the life of the contactor.

The invention has the beneficial effects that: by arranging two power supply circuits, namely a first power supply circuit and a second power supply circuit, for supplying power to the master controller, when the first contactor fails, the first power supply circuit can be used for supplying power to the master controller, so that the master controller can still keep a normal working state; and in the first working mode, the first contactor is excited to determine a first performance parameter of the first contactor, the second power supply loop is monitored according to the first performance parameter and a first threshold value, and the first contactor can be subjected to service life detection under the condition that the first contactor is in a non-working state and normal working of the master control is not influenced, so that monitoring of the second power supply loop is realized.

Drawings

FIG. 1 is a block diagram of a life monitoring device of a contactor according to the present invention;

FIG. 2 is a schematic flow chart illustrating the steps of a method for monitoring the life of a contactor according to the present invention;

fig. 3 is a schematic diagram of a pump circuit.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in fig. 1, an embodiment of the present application provides a device for monitoring a lifetime of a contactor, which includes a first power supply circuit, a second power supply circuit, and a control module, where the control module includes a first detection unit and a second detection unit.

In the embodiment of the application, the first power supply loop is connected with a power grid and a master control, when the power grid is normal, the mode for supplying power to the master control is a first working mode, and the power grid supplies power to the master control through the first power supply loop under the first working mode. It should be noted that the master control may be an object having a control function, and in this embodiment, the master control of the elevator is taken as an example, and it should be understood that the application of this embodiment is not limited.

In this application embodiment, the second power supply loop is connected with energy memory and master control, and when the mode of supplying power for the master control was first operating mode, the electric wire netting can charge for energy memory, and energy memory carries out the accumulate, when the mode of supplying power for the master control was switched into second operating mode by first operating mode, including but not limited to when the electric wire netting falls the electricity or first power supply loop appears unusually, energy memory supplied power for the master control through second power supply loop under second operating mode. Therefore, the device of the embodiment of the application can provide two working modes for the master control, and two power supply loops are provided for supplying power to the master control.

Optionally, the second power supply circuit has a first contactor, and when the mode for supplying power to the master control is the second working mode, the first contactor is in a working state, so that the energy storage device can normally supply power to the master control. It should be noted that, when the mode for supplying power to the main controller is the first operating mode, the first contactor is in a non-operating state.

Similarly, the first power supply loop is provided with a second contactor, and when the mode for supplying power to the master control is the first working mode, the second contactor is in a working state, so that the power grid can normally supply power to the master control. It should be noted that, when the mode for supplying power to the main controller is the second working mode, the second contactor is in a non-working state, that is, in this embodiment of the present application, it is ensured that one of the first contactor and the second contactor is in a working state, and the other is in a non-working state.

In the embodiment of the application, the first detection unit is configured to, in a first operating mode, perform excitation processing on the first contactor to determine a first performance parameter of the first contactor, and monitor the second power supply loop according to the first performance parameter and a first threshold; the first performance parameter is used to characterize a life condition of the first contactor.

In the embodiment of the application, the second detection unit is configured to detect the second contactor in the first working mode, acquire a second performance parameter of the second contactor, and monitor the first power supply loop according to the second performance parameter and a second threshold; the second performance parameter is used to characterize an operating condition of the second contactor.

It can be understood that, when in the second operation mode, the first detection unit may be configured to perform excitation processing on the second contactor to determine a third performance parameter of the second contactor, and monitor the first power supply loop according to the third performance parameter and a third threshold; the third performance parameter is used to characterize the life condition of the second contactor. Similarly, in the second operating mode, the second detecting unit may be configured to detect the first contactor in the second operating mode, obtain a fourth performance parameter of the first contactor, and monitor the second power supply loop according to the fourth performance parameter and a fourth threshold; the fourth performance parameter is used to characterize an operating condition of the first contactor. It should be noted that the first threshold, the second threshold, the third threshold, and the fourth threshold may be adjusted according to actual needs.

For example, when the contactor coil input voltage is over-voltage in excess of 110% Us, the life condition of the coil can be degraded; over-voltage of 170% Us and long-term energization, the coil will burn; short periods of over-voltage of 200% Us will burn the coil. When the input voltage of the coil of the contactor is greatly reduced than Us (such as less than 75% Us), the attraction of the contactor is unreliable and the contactor cannot be attracted completely, the exciting current of the coil is more than 5 times of the normal work holding current of the contactor at the moment, and abnormal temperature rise and coil burning can be caused when the contactor operates for a long time under low voltage. The operation voltage Us refers to rated pull-in operation voltage of a contactor coil, and is different according to different types of contactors, if the allowed range of the pull-in voltage operation voltage Us of the contactor coil is 85% Us-110% Us, the operation voltage Us can be used as a threshold value, and then corresponding multiples such as the first multiple 110% and the second multiple 85% are set according to the allowed range, so that whether the state of the contactor is abnormal or not can be determined by combining the acquired performance parameters. It should be noted that the above examples are only illustrative and do not limit the application.

Referring to fig. 2, in addition, the present application further provides a method for monitoring the lifetime of a contactor, which may be introduced into the device for monitoring the lifetime of a contactor, and includes steps S1 and S2, specifically:

s1, in the first operating mode, the first contactor is energized to determine a first performance parameter of the first contactor.

In an embodiment of the present application, the excitation process includes, but is not limited to, exciting the first contactor by different excitation sources, and collecting corresponding data after excitation to determine a first performance parameter of the first contactor, where the first performance parameter is indicative of a life condition of the first contactor.

Alternatively, step S1 may include the steps of:

s11, in the first working mode, a plurality of different frequencies and voltages are input through an excitation source to excite the first contactor;

in the embodiment of the present application, the first contactor is excited by different frequencies and voltages to obtain corresponding data, and it can be understood that the first contactor may also be excited by other excitation manners to obtain corresponding data, which is not limited specifically.

And S12, calculating to obtain a first performance parameter according to a plurality of different frequencies and voltages.

Alternatively, step S12 may include step S121 and step S122:

and step S121, calculating the equivalent internal resistance and the equivalent inductive reactance of the first contactor according to the plurality of different frequencies and voltages.

Specifically, the total impedance of the coil of the first contactor is X — R1+ jwL, and the values of the first resistor R1 and the inductive reactance wL can be calculated by providing an excitation circuit as shown in fig. 3. For example, the dashed portion in fig. 3 is a first contactor equivalent model, including contact B, first resistor R1, and inductive reactance wL, the excitation circuit further includes a current meter and a second resistor R2 (line resistance for an equivalent loop), and an input voltage and a voltmeter to measure the input voltage. Wherein, there is a formula when carrying out the excitation processing:

V＝(R1+wL)*I＝R1*I+2πfi*L*I

v is voltage, fi is frequency, L is inductance, I current, so the values of R1 and wL can be calculated and determined through more than two frequencies and voltages, R1 is used as equivalent internal resistance, and wL is used as equivalent inductive reactance.

And step S122, determining the ratio between the equivalent internal resistance and the equivalent inductive reactance as a first performance parameter.

Alternatively, in the embodiment of the present application, the first performance parameter is defined as tan θ,it is to be understood that the first performance parameter may also beAccordingly, when the power supply loop is monitored, the comparison between the first performance parameter and the threshold value is adjusted correspondingly.

And S2, monitoring the second power supply loop according to the first performance parameter and the first threshold value.

In particular, the monitoring may include monitoring the state of the first contactor, and may also include controlling the operating state of the first contactor or controlling the circuit in which the first contactor is located. Alternatively, step S2 may include the steps of:

and when the first performance parameter is less than or equal to the first threshold value, cutting off the second power supply loop, and uploading the information of the first contactor.

It can be understood that when the tan θ becomes smaller, the R1 value is described to be larger, that is, the internal resistance of the coil of the first contactor becomes larger, the life of the first contactor is described to be reduced, the risk of damage becomes larger, the heat generation amount of the first contactor is increased under the same coil voltage, and the coil is more prone to burning; and when tan theta is lower than the first threshold value, the first detection unit can cut off the first contactor, namely cut off the second power supply loop, and avoid the first contactor to be put into operation again, and the first detection unit can acquire the information that the life of the first contactor expires and then upload to the system (such as a big data center of an elevator), and the maintenance personnel is informed in time to change, thereby reducing the effect of the maintenance cost of the main control.

Optionally, the method for monitoring the lifetime of the contactor according to the embodiment of the present application may further include step S3, it should be noted that the step S3 and the steps S1 and S2 do not limit the execution sequence, and the execution sequence may be changed or may be executed simultaneously. Specifically, step S3 may include step S31 and step S32.

And S31, detecting the second contactor in the first working mode, and acquiring a second performance parameter of the second contactor.

Specifically, the second performance parameter is used to characterize the operating condition of the second contactor, and optionally, the second performance parameter may be one or more of voltage, current, resistance, power, or a value obtained by performing calculation or deformation on the above parameters, or the like.

And S32, monitoring the first power supply loop according to the second performance parameter and the second threshold value.

Specifically, the monitoring may include monitoring the state of the second contactor, and may also include controlling the working state of the second contactor or controlling a circuit in which the second contactor is located. Specifically, step S32 may include the steps of:

and when the second performance parameter is larger than a first multiple of the second threshold value or smaller than a second multiple of the second threshold value, cutting off the first power supply loop, and switching the working mode from the first working mode to the second working mode.

Specifically, taking the second performance parameter as the voltage for example, the coil of the contactor may have the rated pull-in operation voltage Us, for example, when the allowable range of the rated pull-in operation voltage Us is 85% Us to 110% Us, the rated pull-in operation voltage Us may be used as the second threshold, and then the corresponding multiple, for example, the first multiple 110% and the second multiple 85%, is set according to the allowable range, at this time, when the second performance parameter is greater than 110% Us or the second performance parameter is less than 85% Us, it is determined that the second contactor is in the abnormal operation state, the first power supply loop is cut off, the operation mode is switched from the first operation mode to the second operation mode, and the energy storage device is used to supply power to the main controller, so as to avoid that the second contactor is continuously in the abnormal operation state and is damaged or the first power supply loop cannot supply power to the main controller due to damage.

It can be understood that, if the current power supply mode for the master control is the second operating mode, the second contactor may be processed by a method similar to steps S1 and S2, and the first contactor is processed by a method similar to step S3, which is not described again.

The embodiment of the invention also provides equipment, which comprises a processor and a memory;

the memory is used for storing programs;

the processor is used for executing programs to realize the service life monitoring method of the contactor of the embodiment of the invention. The device provided by the embodiment of the invention can realize the service life monitoring function of the contactor. The equipment can be any intelligent terminal including a mobile phone, a computer, a server, a tablet computer and the like.

The contents in the above method embodiments are all applicable to the present apparatus embodiment, the functions specifically implemented by the present apparatus embodiment are the same as those in the above method embodiments, and the beneficial effects achieved by the present apparatus embodiment are also the same as those achieved by the above method embodiments.

The embodiment of the invention also provides a computer-readable storage medium, which stores a program, and the program is executed by a processor to implement the method for monitoring the service life of the contactor according to the aforementioned embodiment of the invention.

Embodiments of the present invention also provide a computer program product comprising instructions, which when run on a computer, cause the computer to perform the method for monitoring the lifetime of a contactor according to the aforementioned embodiments of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes multiple instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing programs, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.