Elevator braking detection method and device, electronic equipment and storage medium

Abstract

The invention provides an elevator braking detection method and device, electronic equipment and a storage medium. The method comprises the steps that a contactor set in an elevator braking system is controlled to work in a target state; controlling a first phase combination of a brake loop in the elevator brake system to output a first voltage, detecting a first current in the first phase combination, outputting a second voltage on a second phase combination of the brake loop, and detecting a second current in the second phase combination; and whether the elevator braking system is abnormal or not is determined based on the first current and the second current measured when the contactor set is in the target state. According to the scheme, the brake device does not need to be opened in advance, the contactor set is controlled to work in the target state and output the first voltage and the second voltage during detection, the first current and the second current are detected respectively, whether elevator braking is abnormal or not can be determined according to the first current and the second current in the target state, and then the testing risk is reduced.

Description

Technical Field

[0001] The disclosed embodiments of the present application relate to the technical field of transportation equipment, and more specifically, to an elevator braking detection method, device, electronic device and storage medium. Background Art

[0002] The elevator braking system includes a brake arm, a safety clamp, an overspeed protection device and a star-sealing brake device. The star-sealing brake device forms a star-shaped circuit by short-circuiting the three-phase lines of the motor to quickly brake, thereby ensuring the safety of passengers when the elevator brake fails.

[0003] In order to test whether the star-sealing brake device can brake effectively, it is usually necessary to open the brake device to let the elevator slide and then test whether the star-sealing brake device can brake within a predetermined time to determine the effectiveness of the star-sealing brake device; this method, because the brake is manually opened, if the star-sealing brake device cannot brake effectively, it will cause the elevator to eventually fail to brake, which poses a greater risk.

[0004] Therefore, how to reduce the risk when testing the elevator braking system becomes an urgent problem to be solved. Summary of the invention

[0005] According to an embodiment of the present application, the present invention proposes an elevator brake detection method, device, electronic device and storage medium to reduce the risk during elevator brake system testing.

[0006] According to one aspect of the present application, an exemplary elevator braking detection method is disclosed, including: controlling a contactor group in the elevator braking system to operate in a target state; wherein the contactor group includes a star-sealing contactor and a running contactor, the target state is one of a state group, and the state group includes at least the following three working states: the star-sealing contactor contact is closed and the running contactor contact is disconnected, the star-sealing contactor contact is disconnected and the running contactor contact is closed, and the star-sealing contactor contact and the running contactor contact are both closed; controlling a first phase combination of a braking circuit in the elevator braking system to output a first voltage, detect a first current between the first phase combination, and output a second voltage on a second phase combination of the braking circuit, and detect a second current between the second phase combination; wherein the first phase combination and the second phase combination both include two phases, and the first phase combination and the second phase combination have only one phase in common; determining whether the elevator braking system has an abnormality based on the first current and the second current measured when the contactor group is in the target state.

[0007] The above scheme, for a three-phase AC transmission line, outputs voltage to two phase combinations in sequence, and one phase in the two phase combinations is different, which can cover all phases, and the fault on the three-phase line can be detected according to the current measured on the corresponding phase combination; there is no need to open the brake device in advance. During the detection, the contactor group is controlled to work in the target state and output the first voltage and the second voltage respectively, and the first current and the second current generated by the above-mentioned first voltage and second voltage in the corresponding phase combination are detected respectively. According to the first current and the second current under the target state, it can be determined whether there is an abnormality in the elevator braking, thereby reducing the test risk.

[0008] According to the second aspect of the present application, an elevator braking detection device is provided, including a control module, a detection module, and a determination module; the control module is used to control the contactor group in the elevator braking system to operate in a target state; the detection module is used to control the first phase combination of the braking circuit in the elevator braking system to output a first voltage, detect the first current between the first phase combination, and output a second voltage on the second phase combination of the braking circuit, and detect the second current between the second phase combination; wherein the first phase combination and the second phase combination each contain two phases, and only one phase is the same as the first phase combination and the second phase combination; the determination module is used to determine whether there is an abnormality in the elevator braking system based on the first current and the second current measured when the contactor group is in the target state.

[0009] The above scheme performs brake detection through the elevator brake detection device without opening the brake device in advance. During the detection, the contactor group is controlled to operate in the target state and output the first voltage and the second voltage respectively, and the first current and the second current are detected respectively. According to the first current and the second current under the target state, it can be determined whether there is an abnormality in the elevator braking, thereby reducing the test risk.

[0010] According to a third aspect of the present application, an electronic device is provided, comprising a memory and a processor coupled to each other, wherein the processor is used to execute program instructions stored in the memory to implement the above-mentioned elevator braking detection method.

[0011] The above scheme does not need to open the brake device in advance. During detection, the contactor group is controlled to operate in the target state and output the first voltage and the second voltage respectively, and the first current and the second current are detected respectively. According to the first current and the second current under the target state, it can be determined whether there is an abnormality in the elevator braking, thereby reducing the test risk.

[0012] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which program instructions are stored, and when the program instructions are executed by a processor, the above-mentioned elevator braking detection method is implemented.

[0013] The above scheme does not need to open the brake device in advance. During detection, the contactor group is controlled to operate in the target state and output the first voltage and the second voltage respectively, and the first current and the second current are detected respectively. According to the first current and the second current under the target state, it can be determined whether there is an abnormality in the elevator braking, thereby reducing the test risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present application will be further described below in conjunction with the accompanying drawings and implementation methods, in which:

[0015] Figure 1 It is a flow chart of an embodiment of an elevator braking detection method of the present application;

[0016] Figure 2 is a circuit diagram of an embodiment of a brake circuit of the present application;

[0017] Figure 3 It is a flow chart of another embodiment of the elevator braking detection method of the present application;

[0018] Figure 4 It is a flow chart of another embodiment of the elevator braking detection method of the present application;

[0019] Figure 5 It is a schematic diagram of the framework of an embodiment of the elevator braking detection device of the present application;

[0020] Figure 6 It is a schematic diagram of the framework of an embodiment of the electronic device of the present application;

[0021] Figure 7 It is a schematic diagram of a framework of an embodiment of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Please refer to Figure 1 , Figure 1 1 is a flow chart of an embodiment of an elevator braking detection method of the present application; specifically, an elevator braking detection method proposed in the present application can be used for star-locking braking detection, including the following operations:

[0024] Operation S11: Control the contactor group in the elevator braking system to work in the target state. The contactor group includes the star-sealing contactor 21 and the running contactor 22. The target state is one of the state groups. The state group includes at least the following three working states: the contact of the star-sealing contactor 21 is closed and the contact of the running contactor 22 is disconnected, the contact of the star-sealing contactor 21 is disconnected and the contact of the running contactor 22 is closed, and the contact of the star-sealing contactor 21 and the contact of the running contactor 22 are both closed.

[0025] Please refer to Figure 2 , Figure 2 It is a circuit diagram of an embodiment of the braking circuit of the present application; in some embodiments, the frequency converter outputs three-phase alternating current to the motor through the running contactor 22, and the star-sealing contactor 21 is respectively connected to the three phases of the running contactor 22. When the star-sealing contactor 21 is closed, the running contactor 22 and the star-sealing contactor 21 are short-circuited to achieve a braking effect; when the contacts of the star-sealing contactor 21 are disconnected, the current output by the frequency converter will pass through the motor to form a loop.

[0026] Operation S12: controlling a first phase combination of a brake circuit in an elevator brake system to output a first voltage, detecting a first current between the first phase combination, and controlling a second phase combination of the brake circuit to output a second voltage, detecting a second current between the second phase combination; wherein the first phase combination and the second phase combination both include two phases, and the first phase combination and the second phase combination have only one phase in common;

[0027] Exemplarily, controlling the first phase combination to output the first voltage can be that the frequency converter generates a first voltage between the U phase and the V phase, and detecting the first current of the first phase combination, that is, measuring the phase current between the UV phases under the condition that the first voltage is generated between the U phase and the V phase. At this time, when the contacts of the running contactor 22 and the star-sealing contactor 21 can be closed correctly, the UV phases will be short-circuited through the star-sealing contactor 21 to form a loop, that is, the motor is short-circuited. If the contacts of the star-sealing contactor 21 cannot be closed correctly, the UV phases will form a loop through the motor, and the same applies to the output voltages between other phases; the second phase combination to output the second voltage can be that the second voltage is generated between the U phase and the W phase, and the phase current between the UW phases at this time is detected.

[0028] It should be noted that the output voltage between the phase combinations of the braking circuit refers to the voltage generated between the two phases of the braking circuit, so that the two phases form a current loop. For example, the first voltage output in the UV phase combination can be a 220V voltage generated in the U phase relative to the V phase; in addition, the star-sealing contactor and the running contactor in this application are only used as a distinction in name and do not constitute a limitation on specific models or types.

[0029] Operation S13: Determine whether there is an abnormality in elevator braking based on the first current and the second current measured when the contactor group is in the target state.

[0030] In some embodiments, when the target state is that the contact of the star-off contactor 21 is closed and the contact of the running contactor 22 is open, determining whether the elevator braking system is abnormal based on the first current and the second current measured when the contactor group is in the target state includes one of the following:

[0031] In response to the values ​​of the first current and the second current not both being 0, determining that an abnormality exists in the elevator braking system;

[0032] In response to the values ​​of the first current and the second current both being 0, it is determined that there is no abnormality in the elevator braking system.

[0033] Please continue to refer to Figure 2 When the contact of the star-sealing contactor 21 is normally closed and the contact of the running contactor 22 is normally opened, the braking circuit is disconnected. At this time, the output voltage between any two phases cannot generate current, that is, the first current value and the second current value should be 0; however, if the front-end circuit of the running contactor 22 is abnormal, for example, there is a short circuit between the running contactor 22 and the inverter, a phase current will be generated between the two short-circuited phases, that is, the phase current is not 0; for example, when the first voltage is generated between the UV phases, and the UV phases at the front end of the running contactor 22 are short-circuited, then since a current loop can be formed between the UV phases, the phase current generated between the UV phases The first current is not 0; a second voltage is generated between the UW phases, and the second current generated between the UW phases is 0; as long as one of the first current and the second current is not 0, it can be determined that the circuit at the front end of the operating contactor 22 is abnormal. Specifically, for the above example, it can be determined that the circuit between the UV phases at the front end of the operating contactor 22 is short-circuited. On the contrary, if the first current and the second current are both 0, it is determined that the circuit at the front end of the operating contactor 22 is normal; in addition, when the target state is that the contacts of the star-sealing contactor 21 are normally closed and the contacts of the operating contactor 22 are disconnected, the first voltage and the second voltage may be different.

[0034] In some embodiments, in response to the target state being one of the contact of the operation contactor 22 being closed and the contact of the star-blocking contactor 21 being open, and the contact of both the operation contactor 22 and the star-blocking contactor 21 being closed, the first voltage and the second voltage are configured to be the same voltage.

[0035] In some embodiments, when the target state is that the star-off contactor 21 is disconnected and the running contactor 22 is closed, determining whether the elevator braking system is abnormal based on the first current and the second current measured when the contactor group is in the target state includes one of the following:

[0036] In response to the absolute value of the difference between the first current and the second current being greater than a preset value, determining that an abnormality exists in the elevator braking system;

[0037] In response to the absolute value of the difference between the first current and the second current being not greater than a preset value, determining that there is no abnormality in the elevator braking system;

[0038] Wherein, the preset value is configured to be determined by the first voltage or the second voltage;

[0039] Please continue to refer to Figure 2 , when the target state is that the contacts of the star-sealing contactor 21 are disconnected and the contacts of the running contactor 22 are closed, the output voltage of the inverter will form a loop through the motor. If the line between the running contactor 22 and the motor is abnormal at this time, for example, there is a phase break between the running contactor 22 and the motor, then when the voltage is output between the two phases including the phase, the phase current cannot be obtained, and when the voltage is output between the two phases not including the phase, a normal phase current is obtained; illustratively, if the line between the running contactor 22 and the motor in the V phase of the braking circuit is broken, a first voltage is generated between the UV phases and a first current is measured, and a second voltage is generated between the UW phases and a second current is measured, and the first current is almost 0, then it can be determined that the V phase is broken; conversely, if all three phases are normal, since the first voltage is the same as the second voltage, the measured first current is basically equal to the second current.

[0040] In some embodiments, when the target state is that the contacts of the running contactor 22 and the star-off contactor 21 are both closed, determining whether the elevator braking system is abnormal based on the first current and the second current measured when the contactor group is in the target state includes one of the following:

[0041] In response to the absolute value of the difference between the first current and the second current being greater than a preset value, determining that an abnormality exists in the elevator braking system;

[0042] In response to the absolute value of the difference between the first current and the second current being not greater than a preset value, determining that there is no abnormality in the elevator braking system;

[0043] The preset value is configured to be determined by the first voltage or the second voltage.

[0044] Please continue to refer to Figure 2, when the target state is that the contacts of the running contactor 22 and the star-sealing contactor 21 are both closed, under normal circumstances, the current output by the inverter will pass through the running contactor 22 and the star-sealing contactor 21 to form a loop, that is, the motor is short-circuited; if the line between the running contactor 22 and the star-sealing contactor 21 is abnormal, the current of at least one phase will pass through the motor to form a loop; illustratively, assuming that the line between the running contactor 22 and the star-sealing contactor 21 of the V phase is broken, a first voltage is generated between the UV phases, and the first current will flow through the motor; a second voltage is generated between the UW phases, and the second current does not flow through the motor but is short-circuited by the star-sealing contactor 21; obviously, at this time, even under the excitation of the same first voltage and the second voltage, the first current and the second current are different in magnitude, and the first current is smaller than the second current, then it can be determined that the V phase is broken.

[0045] In some embodiments, when the working state is one of the following: the contact of the running contactor 22 is closed and the contact of the star-sealing contactor 21 is disconnected, and the contact of the running contactor 22 and the contact of the star-sealing contactor 21 are both closed, in order to determine whether the difference in magnitude between the first current and the second current is a normal measurement error or indicates a line abnormality, a preset value can be determined according to the voltage value output between the phases of the brake circuit, and whether the brake circuit has an abnormality can be determined according to the relationship between the first current, the second current and the preset value; for example, a preset value of the absolute value of the difference between the first current and the second current can be determined according to the voltage magnitude. Referring to the aforementioned embodiment, when the absolute value of the difference between the first current and the second current exceeds the preset value, it is determined that the elevator brake system has an abnormality; or, a preset value of the quotient of the first current and the second current can be determined according to the first voltage or the second voltage. For example, when the quotient of the first current and the second current is greater than the preset value, it is determined that the elevator brake system has an abnormality, and the preset value depends on the value of the first voltage or the second voltage; the preset value can also be set in other ways, which are not limited in this application.

[0046] The above scheme does not need to perform a sliding test on the elevator, thus avoiding the test risk caused by failure of the star-locking brake; by generating a first voltage and a second voltage to the braking circuit respectively, and comparing the relationship between the obtained first current and the second current, a preset value for determining whether the elevator braking system is normal can be obtained according to the first voltage value or the second voltage value. For different hardware parameters, the preset value can be directly obtained according to the voltage value, and the versatility is strong.

[0047] In some embodiments, before controlling the contactor group in the elevator braking system to operate in the target state, the method further includes:

[0048] Randomly select a working state in the state group as the target state.

[0049] After determining whether the elevator braking system has an abnormality based on the first current and the second current measured when the contactor group is in the target state, the method further includes:

[0050] Determine whether there is an abnormality in the elevator braking system under the target state;

[0051] If yes, then the detection process ends;

[0052] If not and there is an unselected working state, then select an unselected working state in the state group as the new target state.

[0053] Exemplarily, the contactor group can be controlled to first operate in any one of the operating states, as the target operating state, in which the contacts of the star-sealing contactor 21 are closed and the contacts of the running contactor 22 are disconnected, the contacts of the star-sealing contactor 21 are disconnected and the contacts of the running contactor 22 are closed, or the contacts of the star-sealing contactor 21 and the running contactor 22 are both closed. After entering the target operating state, the operation of the elevator braking detection method in the aforementioned embodiment is performed. If it is determined that the elevator braking system has an abnormality based on the first current and the second current, the detection process is terminated. If it is determined that the elevator braking system has no abnormality under the target operating state, one of the remaining two operating states is selected as the next target operating state, and the aforementioned operation is repeated until the tests under all working states are completed.

[0054] In some embodiments, controlling the contactor group in the elevator braking system to operate in a target state includes: controlling the contactor group to operate in the following target states in sequence: the contacts of the star-sealing contactor 21 are closed and the contacts of the running contactor 22 are disconnected, the contacts of the star-sealing contactor 21 are disconnected and the contacts of the running contactor 22 are closed, and the contacts of the star-sealing contactor 21 and the running contactor 22 are both closed.

[0055] In order to prevent fault coupling, the braking circuit is detected from the output side of the inverter to the motor side in sequence. The rear-end circuit can be detected only when there is no abnormality in the front-end circuit, so that the fault point can be accurately located. Exemplarily, the contactor group is first controlled to operate in a state where the contacts of the star-sealing contactor 21 are closed and the contacts of the running contactor 22 are disconnected, so as to detect the line at the front end of the running contactor 22. After determining that there is no abnormality in the line at the front end of the running contactor 22, the contactor group is controlled to enter the operating state where the contacts of the star-sealing contactor 21 are disconnected and the contacts of the running contactor 22 are closed. After determining that there is no abnormality in the line between the running contactor 22 and the star-sealing contactor 21, the contactor group is finally controlled to operate in a state where the contacts of the star-sealing contactor 21 and the contacts of the running contactor 22 are both closed, so as to determine that there is no abnormality in the line between the running contactor 22 and the motor. For the specific detection method, reference can be made to the aforementioned embodiment, which will not be repeated here.

[0056] The above scheme, by reasonably determining the detection strategy, can locate the fault point more accurately, so as to make the troubleshooting work more efficient.

[0057] In some embodiments, based on the first current and the second current measured when the contactor group is in a target state, determining whether there is an abnormality in the elevator braking system includes: based on the target state and the first current and the second current measured in the target state, determining whether there is an abnormality at the target position corresponding to the target state in the elevator braking system.

[0058] With reference to the foregoing embodiment, when the contacts of the star-sealing contactor 21 are closed and the contacts of the running contactor 22 are disconnected, as long as one of the first current and the second current is not zero, it can be determined that an abnormality exists at the corresponding target position in the elevator braking system; and when the contacts of the star-sealing contactor 21 are disconnected and the contacts of the running contactor 22 are closed, and both the contacts of the star-sealing contactor 21 and the running contactor 22 are closed, it can be determined whether an abnormality exists at the corresponding target position through the relationship between the first current, the second current and the preset value.

[0059] In some embodiments, after determining whether there is an abnormality at the target position corresponding to the target state in the elevator braking system based on the target state and the first current and the second current measured under the target state, it also includes: in response to determining that there is no abnormality at the target position of the elevator braking system, controlling the contactor group to operate in the next target state, and executing the steps of outputting the first voltage and the second voltage to the first phase combination and the second phase combination of the braking circuit respectively to obtain the first current, the second current and subsequent steps; or, in response to determining that there is an abnormality at the target position of the elevator braking system, ending the detection process.

[0060] In some embodiments, when the target state is that the contacts of the star-sealing contactor 21 are closed and the contacts of the running contactor 22 are open, the target position is the front-end line of the running contactor 22; when the target state is that the contacts of the star-sealing contactor 21 and the running contactor 22 are both closed, the target position is the line between the running contactor 22 and the star-sealing contactor 21; when the target state is that the contacts of the star-sealing contactor 21 are open and the running contactor 22 are closed, the target position is the rear-end line of the star-sealing contactor 21.

[0061] In some embodiments, before controlling the contactor group in the elevator braking system to operate in the target state, the method further includes: respectively detecting whether the star-off contactor 21 and the running contactor 22 in the contactor group are normal.

[0062] Controlling the contactor group in the elevator braking system to operate in a target state includes: in response to the star-off contactor 21 and the running contactor 22 in the contactor group being normal, controlling the contactor group in the elevator braking system to operate in the target state.

[0063] In some embodiments, please refer to Figure 3 , Figure 3 It is a flow chart of another embodiment of the elevator brake detection method of the present application; specifically, detecting whether the star-locking contactor 21 and the running contactor 22 in the contactor group are normal respectively includes:

[0064] Operation S31: In the case where no control signal is output to the operation contactor 22, detecting whether the operation contactor 22 maintains the original state. The original state includes a normally open state and a normally closed state;

[0065] For the running contactor 22 whose original state is the normally open state, after the control signal is output to the running contactor 22, the contact of the running contactor 22 will change from the open state to the closed state; otherwise, it will change from the closed state to the open state; the purpose of operation S31 is to determine whether the normally open contact or the normally closed contact of the running contactor 22 can maintain the original state normally when no control signal is received. If it is determined to be normal, continue to execute operation S32; if it is determined to be abnormal, it means that the running contactor 22 is faulty and the running contactor 22 needs to be repaired first.

[0066] Operation S32: outputting a control signal to the operation contactor 22 to detect whether the operation contactor 22 is actuated.

[0067] Similarly, operation S32 is to determine whether the running contactor 22 can operate correctly in response to the control signal; for example, for the normally closed running contactor 22, it should be disconnected in response to the control signal, but when the running contactor 22 is stuck and the contacts cannot be disconnected normally, it should be determined that the running contactor 22 is faulty, and the running contactor 22 should be repaired.

[0068] Operation S33: In response to the running contactor 22 maintaining the original state when the control signal is not output to the running contactor 22 and the running contactor 22 operating when the control signal is output to the running contactor 22, it is determined that the running contactor 22 is normal.

[0069] In some embodiments, please refer to Figure 4 , Figure 4 It is a flow chart of another embodiment of the elevator brake detection method of the present application; respectively detecting whether the star-locking contactor 21 and the running contactor 22 in the contactor group are normal, including:

[0070] Operation S41: In the case where no control signal is output to the star-sealing contactor 21, detecting whether the star-sealing contactor 21 maintains an original state; wherein the original state includes a normally open state and a normally closed state;

[0071] For the star-sealing contactor 21 whose original state is the normally open state, after the control signal is output to the star-sealing contactor 21, the contact of the star-sealing contactor 21 will change from the disconnected state to the closed state; otherwise, it will change from the closed state to the disconnected state; the purpose of operation S41 is to determine whether the normally open contact or the normally closed contact of the star-sealing contactor 21 can maintain the original state normally when no control signal is received. If it is determined to be normal, continue to execute operation S42; if it is determined to be abnormal, it means that the star-sealing contactor 21 is faulty and needs to be repaired first.

[0072] Operation S42: outputting a control signal to the star-sealing contactor 21 to detect whether the star-sealing contactor 21 is actuated;

[0073] Similarly, operation S42 is to determine whether the star-sealing contactor 21 can operate correctly in response to the control signal; for example, for the normally closed star-sealing contactor 21, it should be disconnected in response to the control signal, but when the star-sealing contactor 21 is stuck and the contacts cannot be disconnected normally, it should be determined that the star-sealing contactor 21 is faulty, and the star-sealing contactor 21 should be repaired.

[0074] Operation S43 : in response to the star-sealing contactor 21 maintaining the original state when the control signal is not output to the star-sealing contactor 21 and the star-sealing contactor 21 operating when the control signal is output to the star-sealing contactor 21 , determining that the star-sealing contactor 21 is normal.

[0075] In the above scheme, the contactor group itself is first detected before detecting the abnormality of the line in the brake circuit, which can further determine the location of the fault point and prevent noise interference caused by the fault of the contactor itself to the line troubleshooting.

[0076] According to the elevator braking detection device provided by the second aspect of the present application, please refer to Figure 5 , Figure 5 It is a framework diagram of an embodiment of the elevator braking detection device of the present application; specifically, the elevator braking detection device 50 includes a control module 51, a detection module 52, and a determination module 53; the control module 51 is used to control the contactor group in the elevator braking system to operate in a target state; the detection module 52 is used to control the first phase combination of the braking circuit in the elevator braking system to output a first voltage, detect the first current between the first phase combination, and output a second voltage on the second phase combination of the braking circuit, and detect the second current between the second phase combination; wherein the first phase combination and the second phase combination both contain two phases, and only one phase of the first phase combination and the second phase combination is the same; the determination module 53 is used to determine whether there is an abnormality in the elevator braking based on the first current and the second current measured when the contactor group is in the target state.

[0077] The above scheme does not need to perform a sliding test on the elevator, thus avoiding the test risk caused by failure of the star-locking brake; by generating a first voltage and a second voltage to the braking circuit respectively, and comparing the relationship between the obtained first current and the second current, a preset value for determining whether the elevator braking system is normal can be obtained according to the first voltage value or the second voltage value. For different hardware parameters, the preset value can be directly obtained according to the voltage value, and the versatility is strong.

[0078] According to the electronic device provided by the third aspect of the present application, please refer to Figure 6 , Figure 6 It is a schematic diagram of the framework of an embodiment of an electronic device of the present application; the electronic device 60 includes a memory 61 and a processor 62 coupled to each other, and the processor 62 is used to execute program instructions stored in the memory 61 to implement the above-mentioned elevator braking detection method.

[0079] In a specific implementation scenario, the electronic device may include, but is not limited to: a microcomputer, a server, and in addition, the electronic device may also include mobile devices such as a laptop computer and a tablet computer, which are not limited here.

[0080] Specifically, the processor 62 is used to control itself and the memory 61 to implement the steps in any of the above-mentioned elevator braking detection method embodiments. The processor 62 can also be called a CPU (Central Processing Unit). The processor 62 may be an integrated circuit chip with signal processing capabilities. The processor 62 can also be a general-purpose processor 62, a digital signal processor 62 (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field-programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor 62 can be a microprocessor 62 or the processor 62 can also be any conventional processor 62, etc. In addition, the processor 62 can be implemented by an integrated circuit chip.

[0081] The above scheme does not need to perform a sliding test on the elevator, thus avoiding the test risk caused by failure of the star-locking brake; by generating a first voltage and a second voltage to the braking circuit respectively, and comparing the relationship between the obtained first current and the second current, a preset value for determining whether the elevator braking system is normal can be obtained according to the first voltage value or the second voltage value. For different hardware parameters, the preset value can be directly obtained according to the voltage value, and the versatility is strong.

[0082] Please refer to Figure 7 , Figure 7 It is a framework diagram of an embodiment of a computer-readable storage medium of the present application; specifically, the computer-readable storage medium 70 stores program instructions 71, and when the program instructions 71 are executed by the processor, the operations in the above-mentioned elevator braking detection method embodiment are implemented.

[0083] The above scheme does not need to perform a sliding test on the elevator, thus avoiding the test risk caused by failure of the star-locking brake; by generating a first voltage and a second voltage to the braking circuit respectively, and comparing the relationship between the obtained first current and the second current, a preset value for determining whether the elevator braking system is normal can be obtained according to the first voltage value or the second voltage value. For different hardware parameters, the preset value can be directly obtained according to the voltage value, and the versatility is strong.

[0084] It is easy for a person skilled in the art to know that many modifications and changes can be made to the device and method while maintaining the teaching content of the present application. Therefore, the above disclosure should be considered as limited only by the scope of the appended claims.

Claims

1. An elevator braking detection method, characterized in that: include: Controlling a contactor group in an elevator braking system to work in a target state; wherein the contactor group includes a star-sealing contactor and a running contactor, the target state is one of a state group, and the state group includes at least the following three working states: the star-sealing contactor contact is closed and the running contactor contact is disconnected, the star-sealing contactor contact is disconnected and the running contactor contact is closed, and the star-sealing contact and the running contactor contact are both closed; Controlling a first phase combination of a brake circuit in the elevator brake system to output a first voltage, detecting a first current between the first phase combination, and controlling a second phase combination of the brake circuit to output a second voltage, detecting a second current between the second phase combination; wherein the first phase combination and the second phase combination both include two phases, and the first phase combination and the second phase combination have only one phase in common; Based on the first current and the second current measured when the contactor group is in the target state, it is determined whether there is an abnormality in the elevator braking.

2. The method according to claim 1, characterized in that When the target state is that the star-off contactor contact is closed and the running contactor contact is open, determining whether the elevator braking system is abnormal based on the first current and the second current measured when the contactor group is in the target state includes one of the following: In response to the values ​​of the first current and the second current not both being 0, determining that an abnormality exists in the elevator braking system; In response to the values ​​of the first current and the second current both being 0, it is determined that there is no abnormality in the elevator braking system.

3. The method according to claim 1, characterized in that In response to the target state being one of: the running contactor contact being closed and the star-blocking contactor contact being open, and the running contactor contact and the star-blocking contactor contact being both closed, the first voltage and the second voltage are configured to be the same voltage.

4. The method according to claim 3, characterized in that When the target state is that the star-blocking contactor is disconnected and the running contactor is closed, determining whether the elevator braking system is abnormal based on the first current and the second current measured when the contactor group is in the target state includes one of the following: In response to an absolute value of a difference between the first current and the second current being greater than a preset value, determining that an abnormality exists in the elevator braking system; In response to the absolute value of the difference between the first current and the second current being not greater than the preset value, determining that there is no abnormality in the elevator braking system; Wherein, the preset value is configured to be determined by the first voltage or the second voltage; or, When the target state is that the contacts of the running contactor and the star-off contactor are both closed, determining whether the elevator braking system is abnormal based on the first current and the second current measured when the contactor group is in the target state includes one of the following: In response to an absolute value of a difference between the first current and the second current being greater than a preset value, determining that an abnormality exists in the elevator braking system; In response to the absolute value of the difference between the first current and the second current being not greater than a preset value, determining that there is no abnormality in the elevator braking system; The preset value is configured to be determined by the first voltage or the second voltage.

5. The method according to claim 1, characterized in that: Before controlling the contactor group in the elevator braking system to operate in a target state, the method further includes: Randomly selecting one of the working states in the state group as the target state; After determining whether the elevator braking system has an abnormality based on the first current and the second current measured when the contactor group is in the target state, the method further includes: Determine whether there is an abnormality in the elevator braking system under the target state; If yes, then the detection process ends; If not and there is an unselected working state, then an unselected working state is selected from the state group as a new target state.

6. The method according to claim 1, characterized in that The controlling the contactor group in the elevator braking system to operate in a target state comprises: Controlling the contactor group to work in the following target states in sequence: the star-sealing contactor contact is closed and the running contactor contact is disconnected, the star-sealing contactor contact is disconnected and the running contactor contact is closed, and both the star-sealing contactor contact and the running contactor contact are closed; The determining whether the elevator braking system has an abnormality based on the first current and the second current measured when the contactor group is in the target state includes: Based on the target state and the first current and the second current measured under the target state, it is determined whether there is an abnormality at a target position corresponding to the target state in the elevator braking system.

7. The method according to claim 6, characterized in that After determining whether there is an abnormality at a target position corresponding to the target state in the elevator braking system based on the target state and the first current and the second current measured under the target state, the method further Includes one of the following: In response to determining that there is no abnormality in the target position of the elevator braking system, controlling the contactor group to operate in the next target state, and performing the steps of outputting a first voltage and a second voltage to a first phase combination and a second phase combination of a braking circuit respectively to obtain a first current and a second current, and the steps thereafter; In response to determining that there is an abnormality in the target position of the elevator braking system, the detection process is terminated.

8. The method according to claim 6, characterized in that When the target state is that the contact of the star-blocking contactor is closed and the contact of the running contactor is open, the target position is the front-end circuit of the running contactor; When the target state is that the contacts of the star-blocking contactor and the running contactor are both closed, the target position is the line between the running contactor and the star-blocking contactor; When the target state is that the contacts of the star-sealing contactor are disconnected and the running contactor is closed, the target position is the rear end line of the star-sealing contactor.

9. The method according to claim 1, characterized in that: Before controlling the contactor group in the elevator braking system to operate in a target state, the method further includes: Respectively detecting whether the star-off contactor and the running contactor in the contactor group are normal; The controlling the contactor group in the elevator braking system to operate in a target state includes: In response to the fact that the star-off contactor and the running contactor in the contactor group are both normal, the contactor group in the elevator braking system is controlled to operate in the target state.

10. The method according to claim 9, characterized in that The respectively detecting whether the star-off contactor and the running contactor in the contactor group are normal includes: In the case where no control signal is output to the operation contactor, detecting whether the operation contactor maintains an original state; wherein the original state includes a normally open state and a normally closed state; Outputting a control signal to the operation contactor to detect whether the operation contactor is actuated; In response to the operating contactor maintaining an original state when no control signal is output to the operating contactor, and the operating contactor actuates when a control signal is output to the operating contactor, determining that the operating contactor is normal; or, In the case where no control signal is output to the star-sealing contactor, detecting whether the star-sealing contactor maintains an original state; wherein the original state includes a normally open state and a normally closed state; Outputting a control signal to the star-sealing contactor to detect whether the star-sealing contactor is actuated; In response to the star-sealing contactor maintaining an original state when no control signal is output to the star-sealing contactor and the star-sealing contactor actuating when a control signal is output to the star-sealing contactor, it is determined that the star-sealing contactor is normal.

11. An elevator braking detection device, characterized in that: include: A control module, used for controlling the contactor group in the elevator braking system to operate in a target state; A detection module, used for controlling a first phase combination of a brake circuit in the elevator brake system to output a first voltage, detecting a first current between the first phase combination, and outputting a second voltage on a second phase combination of the brake circuit, detecting a second current between the second phase combination; wherein the first phase combination and the second phase combination both contain two phases, and the first phase combination and the second phase combination have only one phase in common; A determination module is used to determine whether there is an abnormality in the elevator braking based on the first current and the second current measured when the contactor group is in the target state.

12. An electronic device, characterized in that: It comprises a memory and a processor coupled to each other, wherein the processor is used to execute program instructions stored in the memory to implement the elevator braking detection method according to any one of claims 1 to 10.

13. A computer-readable storage medium having program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the elevator braking detection method according to any one of claims 1 to 10 is implemented.

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