Detection method, device, system and storage medium

Abstract

The embodiments of the present application provide a detection method, device, system, and storage medium, wherein the detection method includes: determining whether there is anyone in an elevator to be detected within a preset time interval; controlling the elevator door to close when it is determined that there is no one in the elevator within the preset time interval; controlling the elevator to run at zero speed and detecting the output torque of the elevator control system; determining a preset floor that matches the output torque when the output torque is greater than a preset threshold; and detecting the star-sealing contactor after the elevator runs to the preset floor. Using this embodiment, within the preset time interval, when it is determined that there is no one in the elevator, the elevator is controlled to run to a preset floor that matches the output torque, and then the star-sealing contactor is detected. Testing the elevator's star-sealing contactor without affecting the daily operation of the elevator and passenger use is conducive to timely elimination of safety hazards.

Description

Technical Field

[0001] The present application relates to the field of elevator detection technology, and in particular to a detection method, device, system and storage medium. Background Art

[0002] An elevator's star-locking contactor, a specialized contactor for permanent magnet synchronous traction motors, serves as a safety protection measure. By controlling the short circuit of the star-locking contactor, it limits the elevator's runaway speed in the event of brake failure, preventing runaway accidents and ensuring the safety of passengers.

[0003] It should be noted that once the star-sealing contactor itself is damaged or the circuit fails, the elevator will lose its safety protection, posing a huge safety hazard.

[0004] Therefore, it is very important to regularly inspect the elevator's star-sealing contactor in order to promptly detect and eliminate potential safety hazards. Summary of the Invention

[0005] The present application provides a detection method, device, system and storage medium that can detect the star-sealing contactor so as to eliminate safety hazards in a timely manner.

[0006] To achieve the above technical objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a detection method, comprising:

[0008] Determine whether there is anyone in the elevator to be detected within a preset time interval;

[0009] When it is determined that no one is in the elevator within the preset time interval, controlling the elevator door of the elevator to close;

[0010] Controlling the elevator to run at zero speed and detecting the output torque of the elevator control system;

[0011] When the output torque is greater than a preset threshold, determining a preset floor that matches the output torque;

[0012] After the elevator runs to the preset floor, the star-sealing contactor is tested.

[0013] With this implementation, within a preset time interval, when it is determined that there is no one in the elevator, the elevator is controlled to run to a preset floor that matches the output torque, and then the star-sealing contactor is tested. Testing the elevator's star-sealing contactor without affecting the daily operation of the elevator and passenger use is conducive to timely elimination of safety hazards.

[0014] It should be noted that if the elevator control system output torque is not greater than the preset threshold, the elevator control system stops testing. This is because the elevator counterweight and car weight may be equal in this case, resulting in extremely slow car sliding speed, which may cause the elevator control system to misjudge. Therefore, testing is stopped in this case. Testing only begins when the elevator control system output torque exceeds a certain threshold.

[0015] Optionally, the detecting of the star-sealing contactor includes:

[0016] Controlling the brake contactor to open, controlling the star-blocking contactor to close, and controlling the running contactor to close;

[0017] Determine a first detection frequency using a current frequency detection module, where the first detection frequency is the current frequency of the three-phase current of the permanent magnet synchronous motor;

[0018] Determine a second detection frequency using an encoder frequency detection module, where the second detection frequency is the frequency of the encoder pulse signal;

[0019] The three-phase electrical effective value detection module is used to determine the effective value of each phase current in the three-phase current of the permanent magnet synchronous motor.

[0020] Optionally, the detecting of the star-sealing contactor further includes:

[0021] When the first detection frequency is greater than a first preset value and the second detection frequency is 0, it is determined that there is a problem with the encoder signal, detection is stopped, and a fault is reported. The first preset value is the maximum value of the first detection frequency when the encoder signal is normal.

[0022] Optionally, the detecting of the star-sealing contactor further includes:

[0023] When both the first detection frequency and the second detection frequency are 0, it is determined that there are problems with both the encoder signal and the current signal of the permanent magnet synchronous motor, and detection is stopped and a fault is reported.

[0024] Optionally, the detecting the star-sealing contactor further includes:

[0025] When both the first detection frequency and the second detection frequency are not zero and the difference between the first detection frequency and the second detection frequency is less than a second preset value, it is determined that the encoder signal and the current signal of the permanent magnet synchronous motor are normal. The second preset value is the maximum value of the difference between the first detection frequency and the second detection frequency when both the encoder signal and the current signal of the permanent magnet synchronous motor are normal.

[0026] Optionally, the detecting the star-sealing contactor further includes:

[0027] When the second detection frequency is greater than a third preset value, detection is stopped, the elevator is controlled to run to the leveling floor, and a star-sealing contactor fault is reported after shutdown; the third preset value is the maximum value of the second detection frequency when the star-sealing contactor operates normally.

[0028] When the second detection frequency is within a preset safety range and the fluctuation speed of the second detection frequency is greater than a fourth preset value, a phase loss detection is performed on the star-sealing contactor. When a phase loss is determined, the elevator is controlled to run to the leveling floor, and after stopping, a star-sealing contactor fault is reported. The fourth preset value is the maximum value of the fluctuation speed of the second detection frequency when the star-sealing contactor operates normally.

[0029] Optionally, the first detection frequency f1=(θ-θ bak ) / 2π / t; where

[0030] θ=artan(I β / I α ),

[0031] I α =Iu-1 / 2(I v +I w ),

[0032] I β =sqrt(3) / 2(I v -I w );

[0033] The Iu, Iv, and Iw are the three-phase currents of the permanent magnet synchronous motor obtained by the current frequency detection module, t is the time interval between adjacent samples when the current frequency detection module samples the three-phase current, and the θ bak is the θ value corresponding to the previous beat.

[0034] In a second aspect, the present application further provides a detection device, comprising:

[0035] A first determining unit is used to determine whether there is anyone in the elevator to be detected within a preset time interval;

[0036] a first control unit, configured to control the elevator door of the elevator to close when the first determining unit determines that no one is in the elevator within the preset time interval;

[0037] a second control unit, configured to control the elevator to run at zero speed and detect an output torque of the elevator control system;

[0038] a second determining unit, configured to determine a preset floor matching the output torque when the output torque detected by the second control unit is greater than a preset threshold;

[0039] The detection unit is used to detect the star-sealing contactor after the elevator runs to the preset floor.

[0040] In a third aspect, the present application also provides a detection system, comprising: a memory, a brake contactor, a star-sealing contactor, a current frequency detection module, an encoder frequency detection module, and a three-phase electrical effective value detection module, as well as an elevator control system, a running contactor, a permanent magnet synchronous motor, an encoder, and an encoder frequency detection module electrically connected in sequence, wherein the star-sealing contactor is connected between the running contactor and the permanent magnet synchronous motor, the two input ends of the star-sealing contactor are respectively connected to the u phase and the v phase of the three-phase input of the permanent magnet synchronous motor, and the output end of the star-sealing contactor is connected to the w phase of the three-phase input of the permanent magnet synchronous motor; the input ends of the current frequency detection module are respectively connected to the three-phase input ends of the permanent magnet synchronous motor, and the output end of the current frequency detection module is connected to the elevator control system; the input ends of the three-phase electrical effective value detection module are respectively connected to the input ends of the current frequency detection module, and the output end of the three-phase electrical effective value detection module is connected to the elevator control system;

[0041] The memory and the brake contactor are respectively connected to the elevator control system, the brake contactor is used to control the permanent magnet synchronous motor brake, and a computer program that can be run on the elevator control system is stored in the memory. When the elevator control system executes the computer program, it implements the technical solution provided in the above-mentioned first aspect or any possible implementation of the first aspect.

[0042] In a fourth aspect, the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the technical solution provided in the above-mentioned first aspect or any possible implementation of the first aspect.

[0043] It can be understood that the technical solutions provided in the above-mentioned second to fourth aspects can respectively correspond to any solution provided in the first aspect and its possible implementation, and the beneficial effects that can be achieved are similar, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a structural diagram of an elevator detection system provided by an embodiment of the present application;

[0045] Figure 2 1 is a flow chart of a detection method provided in one embodiment of the present application;

[0046] Figure 3 is a structural diagram of a detection device provided in one embodiment of the present application;

[0047] Figure 4 It is a structural diagram of a detection device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0048] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0049] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0050] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0051] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0052] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0053] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0054] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] With the widespread use of elevators, they have brought a lot of convenience to people's daily lives. Regular inspection of elevators is the guarantee for their safe operation.

[0056] In this application, the elevator detection system can detect the star-blocking contactor in the elevator.

[0057] See also Figure 1 , Figure 1 : This is a structural diagram of an elevator detection system provided by an embodiment of the present application; the elevator control system includes: a memory (not shown in the figure), a brake contactor (not shown in the figure), a star-sealing contactor, a current frequency detection module, an encoder frequency detection module and a three-phase electrical effective value detection module, as well as an elevator control system, a running contactor, a permanent magnet synchronous motor, an encoder and an encoder frequency detection module electrically connected in sequence, wherein the star-sealing contactor is connected between the running contactor and the permanent magnet synchronous motor, the two input ends of the star-sealing contactor are respectively connected to the u phase and the v phase of the three-phase input of the permanent magnet synchronous motor, and the output end of the star-sealing contactor is connected to the w phase of the three-phase input of the permanent magnet synchronous motor; the input ends of the current frequency detection module are respectively connected to the three-phase input ends of the permanent magnet synchronous motor, and the output end of the current frequency detection module is connected to the elevator control system; the input ends of the three-phase electrical effective value detection module are respectively connected to the input ends of the current frequency detection module, and the output end of the three-phase electrical effective value detection module is connected to the elevator control system; the memory is connected to the elevator control system, and a computer program that can be run on the elevator control system is stored in the memory. When the elevator control system executes the computer program, it is implemented as follows Figure 2 The brake contactor is connected to the elevator control system and is used to control the motor brake.

[0058] See also Figure 2 , Figure 2 201 to 205, wherein:

[0059] 201. Determine whether there is anyone in the elevator to be inspected within a preset time interval.

[0060] The detection method can be performed periodically, for example, the detection can be set to be performed from 2 am to 4 am every day.

[0061] 202. When it is determined that there is no one in the elevator within a preset time interval, the elevator door is controlled to close.

[0062] In some possible implementations, whether there is someone in the elevator can be determined by detecting whether the elevator has an external elevator call plate and an internal elevator call instruction. If it is detected that the elevator has no external elevator call plate and an internal elevator call instruction, and it lasts for a certain period of time, such as one minute, it can be considered that there is no one in the elevator.

[0063] It is understandable that other methods may also be used to determine whether there is anyone in the elevator. For example, if a camera is provided in the elevator, it may be possible to determine whether there is anyone in the elevator by identifying the image captured by the camera.

[0064] In some possible implementations, it is also possible to determine whether there is anyone in the elevator based on an infrared sensor provided in the elevator.

[0065] There are many ways to determine whether there is someone in the elevator, and this application does not limit the specific method to be used.

[0066] 203. Control the elevator to run at zero speed and detect the output torque of the elevator control system.

[0067] It should be noted that if the elevator control system output torque is less than a certain threshold, the elevator control system stops detecting. This is because the elevator counterweight and car weight may be equal in this case, resulting in extremely slow car sliding speed, which may cause the elevator control system to misjudge. Therefore, detection is stopped in this case. Detection only begins when the elevator control system output torque exceeds a certain threshold.

[0068] 204. When the output torque is greater than a preset threshold, determine a preset floor that matches the output torque.

[0069] When the torque direction is downward, it means the elevator car is lightly loaded. In this case, the preset floor that matches the output torque is the next-to-top floor. For example, if there are 10 floors, the 9th floor, the next-to-top floor, is the preset floor. When the output torque direction of the elevator control system is upward, it means the elevator car is heavy. In this case, the preset floor that matches the output torque is the next-to-bottom floor. For example, if there are 12 floors, the 2nd floor, the next-to-bottom floor, is the preset floor.

[0070] It should be noted that when there are two floors in an elevator, if the elevator control system outputs torque in the downward direction, it means that the elevator car is lightly loaded, and the elevator automatically runs to the first floor. If the elevator control system outputs torque in the upward direction, it means that the elevator car is heavy, and the elevator automatically runs to the second floor.

[0071] It should be noted that if the elevator control system output torque is not greater than the preset threshold, the elevator control system stops testing. This is because the elevator counterweight and car weight may be equal in this case, resulting in extremely slow car sliding speed, which may cause the elevator control system to misjudge. Therefore, testing is stopped in this case. Testing only begins when the elevator control system output torque exceeds a certain threshold.

[0072] 205. After the elevator reaches the preset floor, the star-sealing contactor is tested.

[0073] With this implementation, within a preset time interval, when it is determined that there is no one in the elevator, the elevator is controlled to run to a preset floor that matches the output torque, and then the star-sealing contactor is tested. Testing the elevator's star-sealing contactor without affecting the daily operation of the elevator and passenger use is conducive to timely elimination of safety hazards.

[0074] In some possible implementations, detecting the star-sealing contactor may include: controlling the brake contactor to open, controlling the star-sealing contactor to close, and controlling the running contactor to close; using a current frequency detection module to determine a first detection frequency, where the first detection frequency is the current frequency of the three-phase current of the permanent magnet synchronous motor; using an encoder frequency detection module to determine a second detection frequency, where the second detection frequency is the frequency of the encoder pulse signal; and using a three-phase electrical effective value detection module to determine the effective value of each phase current in the three-phase current of the permanent magnet synchronous motor.

[0075] Wherein, the first detection frequency f1=(θ-θ bak ) / 2π / t; where

[0076] θ=artan(I β / I α ),

[0077] I α =Iu-1 / 2(I v +I w ),

[0078] I β =sqrt(3) / 2(I v -I w );

[0079] Iu, Iv, and Iw are the three-phase currents of the permanent magnet synchronous motor obtained by the current frequency detection module. t is the time interval between adjacent samples when the current frequency detection module samples the three-phase current. bak is the θ value corresponding to the previous beat.

[0080] The encoder frequency detection module is used to measure the encoder pulse signal. The measurement principle is to measure the encoder frequency by counting the number of pulses per unit time using a quadrature encoder pulse (QEP) counter.

[0081] The three-phase electrical RMS detection module is used to sample the three-phase output current for two cycles when the output frequency is detected to fluctuate within a certain range; the average values ​​of the three-phase currents are calculated respectively. Normally, the average values ​​of the three-phase currents are close. If the maximum and minimum values ​​of the three-phase output currents exceed a certain multiple, it means that there is an output phase loss in the three-phase sampled current.

[0082] In some possible implementations, the detecting the star-sealing contactor further includes: when the first detection frequency is greater than a first preset value and the second detection frequency is 0, determining that there is a problem with the encoder signal, stopping detection, and reporting a fault.

[0083] In some possible implementations, testing the star-sealing contactor further includes:

[0084] When the first detection frequency and the second detection frequency are both 0, it is determined that there are problems with the encoder signal and the current signal of the permanent magnet synchronous motor, and the detection is stopped and a fault is reported.

[0085] In some possible implementations, detecting the star-sealing contactor further includes: when the first detection frequency and the second detection frequency are both not 0 and the difference between the first detection frequency and the second detection frequency is less than a second preset value, determining that the encoder signal and the current signal of the permanent magnet synchronous motor are normal.

[0086] In some possible implementations, the testing of the star-sealing contactor further includes: when the second detection frequency is greater than a third preset value, stopping the testing, controlling the elevator to run to the leveling floor, and reporting a star-sealing contactor fault after the elevator stops.

[0087] See also Figure 3 , Figure 3 3 is a schematic structural diagram of a detection device 300 provided in an embodiment of the present application. The detection device 300 includes a first determination unit 301, a first control unit 302, a second control unit 303, a second determination unit 304 and a detection unit 305.

[0088] The first determining unit 301 is used to determine whether there is anyone in the elevator to be detected within a preset time interval; the detection method can be performed periodically, for example, the detection can be set to be performed from 2 am to 4 am every day.

[0089] The first control unit 302 is configured to control the elevator door to close when the first determining unit 301 determines that no one is in the elevator within a preset time interval.

[0090] In some possible implementations, whether there is someone in the elevator can be determined by detecting whether the elevator has an external elevator call plate and an internal elevator call instruction. If it is detected that the elevator has no external elevator call plate and an internal elevator call instruction, and it lasts for a certain period of time, such as one minute, it can be considered that there is no one in the elevator.

[0091] It is understandable that other methods can also be used to determine whether there is someone in the elevator. For example, if a camera is installed in the elevator, it is possible to identify whether there is someone in the elevator by observing the image captured by the camera.

[0092] In some possible implementations, it is also possible to determine whether there is anyone in the elevator based on an infrared sensor provided in the elevator.

[0093] There are many ways to determine whether there is someone in the elevator, and this application does not limit the specific method to be used.

[0094] The second control unit 303 is used to control the elevator to run at zero speed and detect the output torque of the elevator control system.

[0095] It should be noted that if the elevator control system output torque is less than a certain threshold, the elevator control system stops detecting. This is because the elevator counterweight and car weight may be equal in this case, resulting in extremely slow car sliding speed, which may cause the elevator control system to misjudge. Therefore, detection is stopped in this case. Detection only begins when the elevator control system output torque exceeds a certain threshold.

[0096] The second determining unit 304 is configured to determine a preset floor that matches the output torque when the output torque detected by the second control unit 303 is greater than a preset threshold.

[0097] When the torque direction is downward, it means the elevator car is lightly loaded. In this case, the preset floor that matches the output torque is the next-to-top floor. For example, if there are 10 floors, the 9th floor, the next-to-top floor, is the preset floor. When the output torque direction of the elevator control system is upward, it means the elevator car is heavy. In this case, the preset floor that matches the output torque is the next-to-bottom floor. For example, if there are 12 floors, the 2nd floor, the next-to-bottom floor, is the preset floor.

[0098] It should be noted that when there are two floors in an elevator, if the elevator control system outputs torque in the downward direction, it means that the elevator car is lightly loaded, and the elevator automatically runs to the first floor. If the elevator control system outputs torque in the upward direction, it means that the elevator car is heavy, and the elevator automatically runs to the second floor.

[0099] It should be noted that if the elevator control system output torque is not greater than the preset threshold, the elevator control system stops testing. This is because the elevator counterweight and car weight may be equal in this case, resulting in extremely slow car sliding speed, which may cause the elevator control system to misjudge. Therefore, testing is stopped in this case. Testing only begins when the elevator control system output torque exceeds a certain threshold.

[0100] The detection unit 305 is used to detect the star-sealing contactor after the elevator runs to a preset floor.

[0101] With this implementation, within a preset time interval, when it is determined that there is no one in the elevator, the elevator is controlled to run to a preset floor that matches the output torque, and then the star-sealing contactor is tested. Testing the elevator's star-sealing contactor without affecting the daily operation of the elevator and passenger use is conducive to timely elimination of safety hazards.

[0102] In some possible implementations, with respect to detecting the star-sealing contactor, the detection unit 305 is specifically used to control the opening of the brake contactor, the closing of the idling star-sealing contactor, and the closing of the running contactor; determine the first detection frequency using the current frequency detection module, which is the current frequency of the three-phase current of the permanent magnet synchronous motor; determine the second detection frequency using the encoder frequency detection module, which is the frequency of the encoder pulse signal; and determine the effective value of each phase current in the three-phase current of the permanent magnet synchronous motor using the three-phase electrical effective value detection module.

[0103] Wherein, the first detection frequency f1=(θ-θ bak ) / 2π / t; where

[0104] θ=artan(I β / I α ),

[0105] I α =Iu-1 / 2(I v +I w ),

[0106] I β =sqrt(3) / 2(I v -I w );

[0107] Iu, Iv, and Iw are the three-phase currents of the permanent magnet synchronous motor obtained by the current frequency detection module. t is the time interval between adjacent samples when the current frequency detection module samples the three-phase current. bak is the θ value corresponding to the previous beat.

[0108] The encoder frequency detection module is used to measure the encoder pulse signal. The measurement principle is to measure the encoder frequency by counting the number of pulses per unit time using a quadrature encoder pulse (QEP) counter.

[0109] The three-phase electrical RMS detection module is used to sample the three-phase output current for two cycles when the output frequency is detected to fluctuate within a certain range; the average values ​​of the three-phase currents are calculated respectively. Normally, the average values ​​of the three-phase currents are close. If the maximum and minimum values ​​of the three-phase output currents exceed a certain multiple, it means that there is an output phase loss in the three-phase sampled current.

[0110] In some possible implementations, in terms of detecting the star-sealing contactor, the detection unit 305 is further configured to determine that there is a problem with the encoder signal, stop detection, and report a fault when the first detection frequency is greater than a first preset value and the second detection frequency is 0.

[0111] In some possible implementations, in terms of detecting the star-sealing contactor, the detection unit 305 is further used to, when the first detection frequency and the second detection frequency are both 0, determine that there are problems with the encoder signal and the current signal of the permanent magnet synchronous motor, stop detection, and report a fault.

[0112] In some possible implementations, in terms of detecting the star-sealing contactor, the detection unit 305 is further used to determine that the encoder signal and the current signal of the permanent magnet synchronous motor are normal when the first detection frequency and the second detection frequency are both not 0 and the difference between the first detection frequency and the second detection frequency is less than a second preset value.

[0113] In some possible implementations, in terms of detecting the star-sealing contactor, the detection unit 305 is further configured to stop detection when the second detection frequency is greater than a third preset value, control the elevator to run to the leveling floor, and report a star-sealing contactor fault after stopping.

[0114] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of this application. Their specific functions and technical effects can be found in the method embodiment section and will not be repeated here.

[0115] See also Figure 4 , Figure 4 This is a structural diagram of a detection device 400 provided in an embodiment of the present application. The detection device 400 includes: at least one processor 401, a memory 402, and a computer program stored in the memory and executable on the at least one processor. When the processor 401 executes the computer program, the steps in any of the above method embodiments are implemented.

[0116] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments can be implemented.

[0117] An embodiment of the present application provides a computer program product. When the computer program product is run on a mobile terminal, the mobile terminal can implement the steps of any of the above method embodiments when executing the computer program product.

[0118] It is understandable that the preset values ​​and preset thresholds can be determined according to different elevators and based on experience.

[0119] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process of the above-mentioned embodiment method by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of each of the above-mentioned method embodiments. The computer program includes computer program code, which can be in source code form, object code form, executable file, or some intermediate form. The computer-readable medium can at least include: any entity or device capable of carrying computer program code to the camera / terminal device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal, and software distribution medium. For example, a USB flash drive, mobile hard drive, magnetic disk, or optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals or telecommunication signals.

[0120] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0121] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0122] In the embodiments provided in this application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely illustrative. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0123] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0124] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A detection method, characterized in that: The method comprises: Determine whether there is anyone in the elevator to be detected within a preset time interval; When it is determined that no one is in the elevator within the preset time interval, controlling the elevator door of the elevator to close; Controlling the elevator to run at zero speed and detecting the output torque of the elevator control system; When the output torque is greater than a preset threshold, determining a preset floor that matches the output torque; After the elevator runs to the preset floor, the star-sealing contactor is tested.

2. The method according to claim 1, characterized in that The detection of the star-sealing contactor includes: Controlling the brake contactor to open, controlling the star-blocking contactor to close, and controlling the running contactor to close; Determine a first detection frequency using a current frequency detection module, where the first detection frequency is the current frequency of the three-phase current of the permanent magnet synchronous motor; Determine a second detection frequency using an encoder frequency detection module, where the second detection frequency is the frequency of the encoder pulse signal; The three-phase electrical effective value detection module is used to determine the effective value of each phase current in the three-phase current of the permanent magnet synchronous motor.

3. The method according to claim 2, characterized in that The testing of the star-sealing contactor further includes: When the first detection frequency is greater than a first preset value and the second detection frequency is 0, it is determined that there is a problem with the encoder signal, the detection is stopped, and a fault is reported.

4. The method according to claim 2, characterized in that The testing of the star-sealing contactor further includes: When both the first detection frequency and the second detection frequency are 0, it is determined that there are problems with both the encoder signal and the current signal of the permanent magnet synchronous motor, and detection is stopped and a fault is reported.

5. The method according to claim 2, characterized in that The detecting of the star-sealing contactor further includes: When neither the first detection frequency nor the second detection frequency is 0 and the difference between the first detection frequency and the second detection frequency is less than a second preset value, it is determined that the encoder signal and the current signal of the permanent magnet synchronous motor are normal.

6. The method according to claim 2, characterized in that The detecting of the star-sealing contactor further includes: When the second detection frequency is greater than a third preset value, the detection is stopped, the elevator is controlled to run to the leveling floor, and a star contactor fault is reported after the elevator stops; When the second detection frequency is within a preset safety range and the fluctuation speed of the second detection frequency is greater than a fourth preset value, a phase loss detection is performed on the star-sealing contactor. When it is determined that there is a phase loss, the elevator is controlled to run to the leveling floor, and after stopping, a star-sealing contactor fault is reported.

7. The method according to any one of claims 2 to 6, characterized in that: The first detection frequency f1=(θ-θ bak ) / 2π / t; where θ=artan(I β / AND α )、 I α =Iu–1 / 2(I v +I w ), IN β =sqrt(3) / 2(I v -IN w ); The Iu, Iv, and Iw are the three-phase currents of the permanent magnet synchronous motor obtained by the current frequency detection module, t is the time interval between adjacent samples when the current frequency detection module samples the three-phase current, and the θ bak is the θ value corresponding to the previous beat.

8. A detection device, characterized in that: include: A first determining unit is used to determine whether there is anyone in the elevator to be detected within a preset time interval; a first control unit, configured to control the elevator door of the elevator to close when the first determining unit determines that no one is in the elevator within the preset time interval; a second control unit, configured to control the elevator to run at zero speed and detect an output torque of the elevator control system; a second determining unit, configured to determine a preset floor matching the output torque when the output torque detected by the second control unit is greater than a preset threshold; The detection unit is used to detect the star-sealing contactor after the elevator runs to the preset floor.

9. A detection system, characterized in that: include: Memory, brake contactor, star-sealing contactor, current frequency detection module, encoder frequency detection module and three-phase effective value detection module, as well as the elevator control system, running contactor, permanent magnet synchronous motor, encoder and encoder frequency detection module electrically connected in sequence, wherein, The star-sealing contactor is connected between the running contactor and the permanent magnet synchronous motor, the two input ends of the star-sealing contactor are respectively connected to the u-phase and v-phase of the three-phase input of the permanent magnet synchronous motor, and the output end of the star-sealing contactor is connected to the w-phase of the three-phase input of the permanent magnet synchronous motor; the input ends of the current frequency detection module are respectively connected to the three-phase input ends of the permanent magnet synchronous motor, and the output end of the current frequency detection module is connected to the elevator control system; the input ends of the three-phase electrical effective value detection module are respectively connected to the input ends of the current frequency detection module, and the output end of the three-phase electrical effective value detection module is connected to the elevator control system; The memory and the brake contactor are respectively connected to the elevator control system, the brake contactor is used to control the permanent magnet synchronous motor brake, and a computer program that can be run on the elevator control system is stored in the memory. When the elevator control system executes the computer program, the detection method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the detection method according to any one of claims 1 to 7 is implemented.

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