A novel elevator brake power supply safety control device and method

Abstract

This invention discloses a novel safety control device and method for elevator brake power supply. It achieves power control through a multi-channel module with multiple independent and functionally differentiated channels. Compared to traditional single or simple redundant designs, reliability and safety are significantly improved. In the event of a failure in one channel, other channels can still reliably disconnect the brake power supply, preventing elevator slippage and unexpected stops. Secondly, a freewheeling circuit is connected in parallel with the motor brake coil to provide a freewheeling path. When the power is cut off, the current decays smoothly, preventing back electromotive force from damaging components, ensuring stable circuit operation, extending equipment life, and reducing maintenance costs. Furthermore, the channel control module collects and analyzes channel signals in real time. In case of anomalies, it immediately executes anomaly interlock control, cutting off or limiting the current in the abnormal and related channels. This mechanism can respond promptly in the early stages of a fault, preventing the fault from escalating, improving the accuracy and speed of signal anomaly detection, and ensuring elevator safety under various failure conditions.

Description

Technical Field

[0001] This invention relates to the field of elevator brake power supply safety control technology, and in particular to a novel elevator brake power supply safety control device and method. Background Technology

[0002] In elevator systems, the brake device is one of the key components to ensure the safe operation of the elevator. Its performance stability and reliability are directly related to the life safety of passengers and the normal operation of the elevator equipment. As the core power source that drives the brake device, the safety and stability of its control are of paramount importance.

[0003] Traditional elevator brake power control schemes often have several limitations: Firstly, some traditional schemes use a single channel or simple redundancy design for power control, which is insufficient to provide comprehensive and effective protection in the face of complex operating conditions and potential fault risks. Once a fault occurs in the channel, such as power outage, signal interference, or component damage, the brake device may fail to operate normally, leading to dangerous situations such as elevator slippage or unexpected stops, seriously threatening passenger safety. Secondly, during the operation of the motor brake coil, when the power is suddenly cut off, a back electromotive force is generated due to the inductance of the coil. Traditional control schemes lack effective countermeasures, and the back electromotive force may impact other electronic components in the circuit, damaging them and affecting the stability of the entire elevator control system, or even causing more serious faults. In addition, traditional methods may not be timely or accurate enough for monitoring and processing channel signals, failing to capture abnormal changes in channel signals in real time. This prevents timely measures from being taken in the early stages of a fault, leading to the escalation of the fault and increasing the risk of elevator operation and maintenance costs. Summary of the Invention

[0004] In view of this, the present invention proposes a novel elevator brake power supply safety control device and method, which can effectively solve the defects of the existing technology, such as the inability to cope with potential fault risks, the lack of countermeasures against back electromotive force, and the inability to capture abnormal changes in channel signals in real time by using a single channel or simple redundant design to achieve power control.

[0005] The technical solution of this invention is implemented as follows:

[0006] A novel elevator brake power supply safety control device includes:

[0007] A multi-channel module for controlling the power supply of elevator brakes based on multiple channels;

[0008] The freewheeling circuit is used to provide a freewheeling path for the motor's brake coil.

[0009] The channel control module is used to acquire channel signals from the multi-channel module and perform abnormal interlock control operations based on the acquired channel signals.

[0010] As a further optional solution for the novel elevator brake power supply safety control device, the multi-channel module includes:

[0011] The first channel is used to control the main and secondary sides of the transformer.

[0012] The second channel is used to realize the switching control of the brake circuit and the adjustable control of voltage and current;

[0013] The third channel is used to implement the contactor output function.

[0014] A novel safety control method for elevator brake power supply, specifically including:

[0015] Elevator brake power control is achieved through multiple channels. During the elevator brake power control process, a freewheeling circuit is used to provide a freewheeling path for the motor brake coil.

[0016] The system collects signals from each channel in real time and analyzes and judges the collected signals. When any abnormality is detected in any channel signal, an abnormal interlock control operation is executed.

[0017] As a further optional solution to the novel elevator brake power supply safety control method, the method of controlling the elevator brake power supply based on multiple channels specifically includes:

[0018] Set up independent first, second, and third channels;

[0019] Based on the first channel, the power transmission and conversion of the transformer's main and secondary sides are controlled to provide basic power support for the elevator brake power supply;

[0020] Based on the second-channel switching brake circuit, and according to the requirements of different brake models, adjustable control of voltage and current is achieved;

[0021] Based on the output of the third channel analog contactor, a stable control signal is output.

[0022] As a further optional solution to the novel elevator brake power supply safety control method, the provision of a freewheeling path for the motor brake coil via a freewheeling circuit specifically includes:

[0023] Connect the freewheeling circuit in parallel with the motor brake coil;

[0024] When the elevator brake power supply is in normal power supply state, the freewheeling circuit is not conducting, and the motor brake coil works normally under the power supply drive; when the elevator brake power supply is cut off, the freewheeling circuit immediately conducts, providing a low impedance current path for the motor brake coil.

[0025] As a further optional solution to the novel elevator brake power supply safety control method, the real-time acquisition of signals from each channel and the analysis and judgment of the acquired channel signals, and the execution of an abnormality interlock control operation when any abnormality is detected in any channel signal, specifically includes:

[0026] Real-time acquisition of status signals from the first, second, and third channels;

[0027] The system analyzes and judges the collected status signals based on a preset hierarchical fault handling mechanism to determine whether there are any abnormalities in each status signal. When an abnormality is determined, an abnormality interlock control operation is immediately executed. The hierarchical fault handling mechanism includes a single-channel fault logic processing operation mechanism, a dual-channel fault logic processing operation mechanism, and a three-channel fault logic processing operation mechanism.

[0028] As a further optional solution to the novel elevator brake power supply safety control method, the single-channel fault logic processing mechanism analyzes and judges the collected status signals, specifically including:

[0029] Based on the current channel's security logic rules, a chip select signal corresponding to each status signal is generated. The chip select signal is used to uniquely identify the valid signal that needs to be retained.

[0030] The acquired status signals are filtered and processed using the chip select signal to obtain valid signals that are directly related to the current channel security logic;

[0031] The filtered valid signals are subjected to real-time pairwise cross operations to obtain the final judgment value;

[0032] If the final judgment value exceeds the preset normal threshold range, the current channel is determined to be abnormal.

[0033] As a further optional solution to the novel elevator brake power supply safety control method, the dual-channel fault logic processing mechanism analyzes and judges the collected status signals, specifically including:

[0034] Based on preset dual-channel security logic rules, a chip select signal group is generated for different combinations of state signals of the two channels. This chip select signal group is used to match the valid signal pairs required for dual-channel interactive security judgment.

[0035] The chip select signal group is matched with the status signals acquired by the two channels to extract the valid signal pairs required for dual-channel interactive security judgment.

[0036] The extracted valid signal pairs are subjected to real-time cross-comparison calculation to obtain the cross-comparison calculation result. If the cross-comparison calculation result exceeds the preset dual-channel safety coordination threshold range, it is determined that there is a dual-channel fault.

[0037] As a further optional solution to the novel elevator brake power supply safety control method, the three-channel fault logic processing mechanism analyzes and judges the collected status signals, specifically including:

[0038] The preset three-channel global security logic strategy generates a chip select signal system adapted to complex three-channel security judgment scenarios. This chip select signal system is used to match the effective signal combination necessary for three-channel interactive security analysis.

[0039] The chip select signal system is used to filter and match the status signals of the three channels to extract the effective signal combination necessary for the three-channel interactive security analysis.

[0040] For the extracted set of valid signals, multidimensional comprehensive operation and analysis are carried out to obtain the multidimensional comprehensive operation and analysis results. If the multidimensional comprehensive operation and analysis results exceed the preset three-channel safe operation threshold range, it is determined that there is a three-channel fault.

[0041] A computing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the above-described novel elevator brake power supply safety control methods.

[0042] The beneficial effects of this invention are as follows: Firstly, by using a multi-channel module based on multiple independent channels to control the elevator brake power supply, each channel has a clear and differentiated function. Compared to traditional single-channel or simple redundant designs, this greatly improves the system's reliability and safety. Even if one channel fails, such as due to power outage or component damage, other channels can still operate normally, ensuring reliable disconnection of the brake power supply. This effectively addresses potential fault risks and prevents dangerous situations such as elevator slippage or unexpected stops due to brake power supply issues. Secondly, the freewheeling circuit is connected in parallel with the motor brake coil, providing a freewheeling path for the motor brake coil. When the elevator brake power supply is cut off, the current in the motor brake coil does not suddenly interrupt but smoothly transitions and gradually decays along the freewheeling circuit. This design effectively avoids sudden current changes. The generated back electromotive force damages other components in the circuit, ensuring the stable operation of the entire elevator brake power supply safety circuit, extending the service life of the equipment, and reducing maintenance costs. In addition, the channel control module can collect channel signals from the multi-channel module in real time and perform timely analysis and judgment based on the collected signals. Once any abnormality is detected in any channel signal, an abnormal interlock control operation is immediately executed to cut off or limit the current supply to the relevant abnormal channel and potentially affected associated channels. This real-time monitoring and rapid response mechanism can detect and take measures in the early stages of a fault, preventing the fault from escalating. It greatly improves the accuracy and response speed of capturing abnormal changes in channel signals, effectively ensuring the safety of the elevator in any single-point or multi-point failure situation and reducing the risk of elevator operation. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the composition of a novel elevator brake power supply safety control device according to the present invention;

[0045] Figure 2 This is a flowchart illustrating a novel elevator brake power supply safety control method according to the present invention.

[0046] Figure 3 This is a schematic diagram of the composition of a computing device according to the present invention. Detailed Implementation

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] refer to Figures 1 to 3 A novel elevator brake power supply safety control device includes a multi-channel module, a freewheeling circuit, and a channel control module, wherein:

[0049] A multi-channel module is used to control the power supply of the elevator brake based on multiple channels; in some embodiments, the multi-channel module includes:

[0050] The first channel is used to control the main and secondary sides of the transformer.

[0051] The second channel is used to realize the switching of the brake circuit control and the adjustable control over a wide voltage and current range;

[0052] The third channel is used to implement the contactor output function.

[0053] Specifically, the first channel, serving as the control terminal for the transformer's primary and secondary sides, utilizes high-performance power semiconductor devices and precise control circuitry. By monitoring the voltage and current parameters of the transformer's primary and secondary sides in real time, and accurately adjusting the transformer's output according to different stages of elevator operation (such as start-up, running, and stopping), it ensures a stable and compliant power supply to the elevator's brake system. For example, during elevator start-up, the output voltage is appropriately increased to rapidly open the brake; during smooth elevator operation, a suitable voltage is maintained to keep the brake stable. The second channel employs a chopper MOS to achieve switch-on brake circuit control and adjustable control across wide voltage and current ranges. Based on real-time feedback of the brake status information, the chopper MOS precisely controls the on / off time of the brake circuit, thereby... This system enables precise adjustment of the brake action. Furthermore, by adjusting control parameters for different elevator brake models, it can adapt to a wide range of voltage and current requirements. For example, for low-power brakes, the output voltage and current are reduced; for high-power brakes, the corresponding output parameters are increased, ensuring that all types of brakes can operate normally. The third channel uses a MOS analog 15B contactor output terminal, employing a reliable output drive circuit and protection mechanism to stably output control signals, driving the contactor to operate and control the on / off state of the elevator brake power supply. During elevator operation, the third channel accurately controls the contactor's closing and opening according to system instructions, ensuring that the supply and disconnection of brake power conforms to the elevator's operating logic.

[0054] Thus, the collaborative operation of multiple channels makes the elevator brake power supply control more stable. Each channel independently undertakes a specific function with minimal interference between them. For example, the first channel focuses on transformer control to ensure stable power supply; the second channel performs fine-tuning of the brake circuit to adapt to different operating conditions; and the third channel accurately controls the contactor to ensure timely power switching. This division of labor and cooperation effectively avoids system collapse caused by a single channel failure, improving the stability of the entire elevator brake system. Secondly, the wide voltage and wide current adjustable control characteristics of the second channel enable the device to adapt to various elevator brake models. Regardless of the power or specifications of the brake, normal operation can be achieved by adjusting the control parameters of the second channel, greatly enhancing the versatility and applicability of the device and reducing equipment management and maintenance costs for elevator manufacturers and maintenance units.

[0055] The freewheeling circuit is used to provide a freewheeling path for the motor's brake coil.

[0056] Specifically, the freewheeling circuit is connected in parallel with the motor brake coil. The freewheeling circuit mainly consists of a fast recovery diode and appropriate resistors, capacitors, and other components. When the elevator is running normally and the brake power supply is normal, current flows through the motor brake coil. At this time, the fast recovery diode in the freewheeling circuit is in reverse cutoff, the freewheeling circuit is not conducting, and it does not affect the normal operation of the motor brake coil. When the elevator needs to stop and the brake power supply is cut off, the current in the motor brake coil suddenly decreases. Due to the coil inductance, a back electromotive force is generated. At this time, the fast recovery diode in the freewheeling circuit immediately conducts in the forward direction, providing a low-impedance freewheeling path for the motor brake coil. The current smoothly transitions and gradually decays along the path formed by the fast recovery diode, resistors, and capacitors in the freewheeling circuit. For example, at the moment the elevator reaches the target floor and the control system issues a stop command and cuts off the brake power supply, the freewheeling circuit quickly takes effect, preventing the current in the motor brake coil from changing abruptly and avoiding the impact of the back electromotive force on other components in the circuit.

[0057] Thus, the freewheeling circuit effectively suppresses the back electromotive force generated by sudden changes in the motor brake coil current. In traditional elevator brake power control systems, back electromotive force may cause overvoltage surges to sensitive components such as chips and transistors in the control circuit, leading to component damage and affecting the normal operation of the entire system. However, the freewheeling circuit in this device limits the back electromotive force to a safe range, protecting various components in the circuit, extending the service life of the equipment, and reducing maintenance costs. Secondly, by providing a freewheeling path for the motor brake coil, the smooth change of the motor brake coil current is ensured. This makes the elevator brake action more stable and reliable, avoiding abnormal brake action caused by sudden current changes, such as brake jitter and unstable brake force. During frequent elevator starts and stops, the freewheeling circuit continues to play a role, ensuring the stable operation of the elevator brake system under various working conditions and improving the comfort and safety of passengers riding the elevator.

[0058] The channel control module is used to acquire channel signals from the multi-channel module and perform abnormal interlock control operations based on the acquired channel signals.

[0059] A novel safety control method for elevator brake power supply, specifically including:

[0060] Elevator brake power control is achieved through multiple channels. During the elevator brake power control process, a freewheeling circuit is used to provide a freewheeling path for the motor brake coil.

[0061] The system collects signals from each channel in real time and analyzes and judges the collected signals. When any abnormality is detected in any channel signal, an abnormality interlock control operation is executed.

[0062] In some embodiments, the method of controlling the elevator brake power supply based on multiple channels specifically includes:

[0063] Set up independent first, second, and third channels;

[0064] Based on the first channel, the power transmission and conversion of the transformer's main and secondary sides are controlled to provide basic power support for the elevator brake power supply;

[0065] Based on the second-channel switching brake circuit, and according to the requirements of different brake models, adjustable control with wide voltage and wide current is achieved;

[0066] Based on the output of the third channel analog contactor, a stable control signal is output.

[0067] Specifically, three independent and functionally defined channels are set up. The first channel, serving as the control terminal for the transformer's primary and secondary sides, utilizes integrated circuits and power devices with high-precision control capabilities. By monitoring the voltage and current parameters of the transformer's primary and secondary sides in real time and employing a closed-loop feedback control algorithm, it precisely adjusts the transformer's output voltage and current. For example, during peak hours in a commercial complex, when elevators frequently start and stop, the first channel can dynamically adjust the transformer output based on the actual load, ensuring a stable power supply for the elevator brake and keeping the brake system in good working order. The second channel employs chopper MOS technology to achieve switch-mode brake circuit control and adjustable control across a wide voltage and current range. The chopper MOS circuit precisely controls the on / off time and output parameters of the brake circuit based on the elevator control system's commands and the real-time status feedback of the brake. Since elevators in commercial complexes may require brake devices of different specifications and power, the second channel flexibly adjusts parameters such as the duty cycle of the control signal to achieve wide-range voltage and current output adjustment. For example, when replacing the brake with one of higher power, only a simple adjustment of the control parameters of the second channel is needed to make it work normally, without the need for a large-scale modification of the entire power control system. The third channel simulates the function of the output terminal of the 15B contactor and adopts a highly reliable drive circuit and protection mechanism. It can stably output control signals and accurately control the action of the contactor. During elevator operation, the third channel controls the closing and opening of the contactor in a timely and accurate manner according to the system's logic instructions, ensuring that the power supply to the brake meets the elevator's operating requirements. For example, after the elevator arrives at the designated floor, the third channel quickly outputs a signal to disconnect the contactor, cut off the brake power supply, and allow the brake to close in time, ensuring the safe stopping of the elevator.

[0068] In this way, the three channels work together to achieve precise control of the elevator brake power supply. The first channel ensures the stability of the basic power supply, the second channel flexibly adjusts the output parameters according to the brake requirements, and the third channel ensures timely and accurate power on / off. This multi-level control method greatly improves the precision of power control, enabling the elevator brake system to receive more precise power support, thereby improving the accuracy and reliability of the brake action. Secondly, the wide voltage and wide current adjustable control characteristics of the second channel make this power control system compatible with various models and specifications of elevator brake devices. In places like commercial complexes, where elevators may need to be upgraded or have parts replaced, this technical solution can easily adapt to new brake devices without replacing the entire power control system, reducing modification costs and maintenance difficulty. In addition, through the coordinated work of the three channels, the elevator brake power supply is ensured to be stable and accurately controlled under any circumstances. During elevator start-up, stopping, and operation, the brake can act accurately according to the predetermined logic and requirements, effectively preventing safety accidents such as elevator slippage and unexpected stops. In commercial complexes with high traffic and frequent elevator use, this provides passengers with a safer and more stable elevator environment.

[0069] In some embodiments, providing a freewheeling path for the motor brake coil via a freewheeling circuit specifically includes:

[0070] Connect the freewheeling circuit in parallel with the motor brake coil;

[0071] When the elevator brake power supply is in normal power supply state, the freewheeling circuit is not conducting, and the motor brake coil works normally under the power supply drive; when the elevator brake power supply is cut off, the freewheeling circuit immediately conducts, providing a low impedance current path for the motor brake coil.

[0072] In some embodiments, the real-time acquisition of signals from each channel and the analysis and judgment of the acquired channel signals, and the execution of an abnormality interlock control operation when any channel signal is detected to be abnormal, specifically includes:

[0073] Real-time acquisition of status signals from the first, second, and third channels;

[0074] The system analyzes and judges the collected status signals based on a preset hierarchical fault handling mechanism to determine whether there are any abnormalities in each status signal. When an abnormality is determined, an abnormality interlock control operation is immediately executed. The hierarchical fault handling mechanism includes a single-channel fault logic processing operation mechanism, a dual-channel fault logic processing operation mechanism, and a three-channel fault logic processing operation mechanism.

[0075] Specifically, the system acquires real-time and precise status signals from the first channel (transformer main and secondary control terminals), the second channel (chopped MOS channel), and the third channel (using MOS to simulate contactor output). These status signals cover key information such as voltage, current, and on / off status. Based on a preset hierarchical fault handling mechanism, the acquired status signals are analyzed and judged. For the single-channel fault logic processing mechanism, when only one channel's signal is abnormal, such as the voltage signal of the first channel exceeding the preset safety threshold range, the system will immediately identify it as a single-channel fault. At this time, the abnormal interlock control operation will quickly cut off the current supply to the abnormal channel and restrict related potentially affected functions to prevent further fault propagation. For example, if the chopper MOS control of the second channel... If a logic error occurs in the control signal, the system will promptly cut off the output of the second channel to prevent the erroneous control signal from causing abnormal operation of the brake circuit. When a dual-channel fault occurs, the dual-channel fault logic processing mechanism is activated. Assuming that the first and third channels experience signal abnormalities simultaneously, the system will comprehensively assess the fault conditions of the two channels and execute more stringent interlocking control operations. This will not only cut off the power supply to the two faulty channels but also provide protective control to other related components, ensuring that the entire elevator brake power system remains in a safe state. If all three channels experience abnormalities, the three-channel fault logic processing mechanism will fully intervene, immediately cutting off the power supply to all channels and triggering emergency protection measures, such as issuing alarm signals and notifying maintenance personnel to handle the situation promptly, maximizing the safety of the elevator system.

[0076] Thus, in the high-frequency use environment of elevators in commercial complexes, the channel control module can collect and analyze signals from each channel in real time. Once an anomaly is detected, the graded fault handling mechanism can react quickly and execute abnormal interlock control operations. This rapid response mechanism effectively prevents the continued development and deterioration of the fault, ensuring the safety of the elevator brake power system under any single-point or multi-point failure, and reducing the risk of elevator operation. Secondly, the graded fault handling mechanism adopts corresponding handling strategies according to different fault conditions (single-channel, dual-channel, and triple-channel faults). This precise judgment and handling method avoids the problems of over-protection or under-protection. For example, for a single-channel fault, only the faulty channel is cut off without affecting the operation of other normal channels, ensuring that the elevator can still maintain a certain operating capacity under partial fault conditions. For multi-channel faults, comprehensive protection measures are taken to ensure system safety.

[0077] In some embodiments, the single-channel fault logic processing mechanism analyzes and judges the acquired state signals, specifically including:

[0078] Based on the current channel's security logic rules, a chip select signal corresponding to each status signal is generated. The chip select signal is used to uniquely identify the valid signal that needs to be retained.

[0079] The acquired status signals are filtered and processed using the chip select signal to obtain valid signals that are directly related to the current channel security logic;

[0080] The filtered valid signals are subjected to real-time pairwise cross operations to obtain the final judgment value;

[0081] If the final judgment value exceeds the preset normal threshold range, the current channel is determined to be abnormal.

[0082] Specifically, taking the first channel (transformer main and secondary control terminals) as an example, firstly, according to its safety logic rules, chip select signals corresponding to each state signal are generated. For example, for voltage state signals, the normal range is set to [V1, V2]. When the acquired voltage value is within this range, a high-level chip select signal is generated; if it exceeds this range, a low-level chip select signal is generated. These chip select signals are like "keys," used to uniquely identify the valid signals that need to be retained. Next, the generated chip select signals are used to filter the acquired state signals. Assuming that multiple state signals such as voltage and current are acquired in the first channel, only state signals with corresponding high-level chip select signals can be retained as valid signals directly related to the safety logic of the current channel. For example, if the voltage chip select signal is high and the current chip select signal is low, then the voltage signal will be retained, while the current signal will be filtered out. Then, the filtered signals are further processed. The selected valid signals are subjected to real-time pairwise cross-operations. For example, the retained voltage signal is compared with the preset normal voltage threshold. At the same time, the voltage signal can also be cross-operated with other relevant signals (such as time signals to analyze the changes in voltage over different time periods). The final judgment value is obtained through these operations. If the final judgment value exceeds the preset normal threshold range, for example, if the final judgment value of the voltage shows that the voltage continues to rise abnormally for a certain period of time, it is determined that there is an abnormality in the first channel. Once an abnormality is determined, the system will immediately execute an abnormal interlock control operation, such as cutting off the power supply to the first channel to prevent the abnormal situation from further affecting the normal operation of the elevator brake system.

[0083] Thus, the single-channel fault logic processing mechanism can meticulously analyze status signals based on the unique safety logic rules of each channel. It filters valid signals using chip select signals and then performs cross-operations to obtain a judgment value. This multi-step processing method can accurately identify whether a single channel has a fault. For example, it can accurately determine whether the first channel has abnormal voltage, current, or other parameters. Secondly, using chip select signals to filter valid signals avoids the influence of invalid or interference signals on fault judgment. Simultaneously, real-time pairwise cross-operations further improve the accuracy of fault judgment. For instance, cross-operating voltage and time signals provides a more comprehensive understanding of voltage change trends, avoiding misjudgments due to instantaneous signal fluctuations, and ensuring that abnormal interlock control operations are triggered only when a true fault occurs. Furthermore, when a single channel fault occurs, timely and accurate judgment and execution of abnormal interlock control operations prevent the faulty channel from affecting other normal channels and the entire elevator brake system. In the context of high-frequency elevator use in commercial complexes, this ensures the stable operation of the elevator system and reduces elevator shutdowns and abnormal operation caused by single-channel faults.

[0084] In some embodiments, the dual-channel fault logic processing mechanism analyzes and judges the acquired state signals, specifically including:

[0085] Based on preset dual-channel security logic rules, a chip select signal group is generated for different combinations of state signals of the two channels. This chip select signal group is used to match the valid signal pairs required for dual-channel interactive security judgment.

[0086] The chip select signal group is matched with the status signals acquired by the two channels to extract the valid signal pairs required for dual-channel interactive security judgment.

[0087] The extracted valid signal pairs are subjected to real-time cross-comparison operations. The operation methods include at least one of difference calculation, ratio analysis, and logical relationship verification to obtain the cross-comparison operation results. If the cross-comparison operation results exceed the preset dual-channel security collaboration threshold range, it is determined that there is a dual-channel fault.

[0088] Specifically, assuming we are concerned with the safety of the interaction between the first channel (the control terminals of the transformer's primary and secondary sides) and the second channel (the chopper MOS channel), firstly, based on preset dual-channel safety logic rules, we generate chip select signal groups for different combinations of state signals of these two channels. For example, when the voltage of the first channel is within the normal range and the conduction time of the chopper MOS in the second channel conforms to the preset logic, a specific set of chip select signals is generated; if the current of the first channel is abnormal and the output current of the second channel exceeds the threshold, another set of chip select signals is generated. These chip select signal groups are specifically used to match the valid signal pairs required for dual-channel interactive safety judgment.

[0089] Next, the generated chip select signal group is matched with the status signals collected by the first channel and the second channel respectively. For example, the chip select signal is used to accurately extract the effective signal pairs required for dual-channel interactive safety judgment from the numerous status signals (voltage, current, etc.) collected by the first channel and the status signals (chopper MOS conduction time, output current, etc.) collected by the second channel. For example, the combination signal pair of the first channel voltage and the second channel chopper MOS conduction time.

[0090] Then, real-time cross-comparison operations are performed on the extracted valid signal pairs. There are multiple operation methods. Taking difference calculation as an example, the difference between the voltage of the first channel and the corresponding preset standard voltage is calculated, and the difference between the conduction time of the second channel chopper MOS and the ideal conduction time is calculated at the same time. Then the relationship between these two differences is analyzed. Alternatively, ratio analysis can be performed to calculate the ratio of the current of the first channel to the output current of the second channel to see if it is within the safe coordination range. Logical relationship verification can also be performed to check whether the changes in the signal of the first channel and the changes in the signal of the second channel conform to the preset logical sequence. The cross-comparison operation results are obtained through these operations.

[0091] If the cross-comparison result exceeds the preset dual-channel safety coordination threshold range, such as an excessively large difference, an abnormal ratio, or a disordered logical relationship, a dual-channel fault is determined to exist. Once determined, the system will immediately execute abnormal interlock control operations, such as simultaneously cutting off part or all of the power supply to the first and second channels to prevent the fault from further expanding and to ensure the safety of the elevator brake system.

[0092] Thus, the dual-channel fault logic processing mechanism generates chip select signal groups based on preset rules, accurately extracts valid signal pairs and performs cross-comparison calculations, which can accurately determine whether there is an interactive fault between the two channels. For example, it can promptly detect the adverse effects of voltage changes in the first channel on the operating state of the chopper MOS in the second channel, avoiding elevator brake abnormalities caused by dual-channel interaction problems. Secondly, this mechanism considers the interaction relationship between the two channels, making fault judgment more comprehensive. By analyzing valid signal pairs through multiple calculation methods, it can discover potential dual-channel coordination problems from different angles, improving the system's fault identification capability and reducing safety hazards caused by dual-channel interactive faults.

[0093] In some embodiments, the three-channel fault logic processing mechanism analyzes and judges the acquired state signals, specifically including:

[0094] The preset three-channel global security logic strategy generates a chip select signal system adapted to complex three-channel security judgment scenarios. This chip select signal system is used to match the effective signal combination necessary for three-channel interactive security analysis.

[0095] The chip select signal system is used to filter and match the status signals of the three channels to extract the effective signal combination necessary for the three-channel interactive security analysis.

[0096] For the extracted set of valid signals, a multi-dimensional comprehensive operation analysis is carried out. The operation methods include at least two of the following: synchronization difference calculation of multi-channel signals, multi-parameter correlation ratio analysis, verification of complex logical relationships, and intelligent prediction operation based on data models. The result of the multi-dimensional comprehensive operation analysis is obtained. If the result of the multi-dimensional comprehensive operation analysis exceeds the preset three-channel safe operation threshold range, it is determined that there is a three-channel fault.

[0097] Specifically, firstly, based on the preset three-channel global safety logic strategy, a chip select signal system adapted to complex three-channel safety judgment scenarios is generated. For example, for the normal combination mode of the three-channel signals under different working conditions, corresponding chip select signal rules are set. When the elevator is in a light-load ascending condition, the voltage, current and control signals of the three channels should be within a specific range and logical relationship, and a set of chip select signals is generated accordingly. In the heavy-load descending condition, another set of chip select signals is generated. These chip select signal systems are specifically used to match the effective signal combinations necessary for three-channel interactive safety analysis.

[0098] Next, the chip select signal system is used to filter and match the status signals of the three channels. From the large number of status signals collected from the three channels, the effective signal combination that meets the safety analysis requirements is accurately extracted. For example, the real-time voltage of the first channel, the chopper MOS conduction frequency of the second channel, and the contactor action time of the third channel are extracted as a specific combination signal.

[0099] Then, for the extracted set of valid signals, multi-dimensional comprehensive operation and analysis are carried out. The operation methods are rich and diverse. Taking the calculation of synchronization difference as an example, the difference between the value of the key signal of the three channels at the same time and their respective preset standard values ​​is calculated, and the correlation between the differences is analyzed. Multi-parameter correlation ratio analysis is carried out, such as calculating the ratio of the current of the first channel to the output power of the second channel, and the relationship between this ratio and the control signal of the third channel. Complex logic relationship verification is carried out to check whether the order of changes of the signals of the three channels and the logic conditions meet the preset requirements. Intelligent prediction operation based on data model can also be used to predict the operating status of the three channels in the future period of time based on historical data and current signal trends. Through these operations, the results of multi-dimensional comprehensive operation and analysis are obtained.

[0100] If the results of the multidimensional comprehensive calculation and analysis exceed the preset three-channel safe operation threshold range, such as excessive synchronization difference, abnormal correlation ratio, unsatisfactory logical relationship, or prediction results indicating safety risks, then a three-channel fault is determined. Once determined, an abnormal interlock control operation will be immediately executed to completely cut off or restrict the power supply and related control functions of the three channels to prevent the fault from causing more serious consequences.

[0101] In this way, the three-channel fault logic processing and operation mechanism generates a chip select signal system through a preset global safety logic strategy, accurately filters effective signals and performs multi-dimensional comprehensive operation and analysis, and can deeply identify the complex fault relationships between the three channels. For example, it can detect the abnormal coordination of the three channel signals under specific working conditions and avoid the failure of the elevator brake system caused by the interaction fault of the three channels.

[0102] A computing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the above-described novel elevator brake power supply safety control methods.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel elevator brake power supply safety control device, characterized in that, include: A multi-channel module for controlling the power supply of elevator brakes based on multiple channels; The freewheeling circuit is used to provide a freewheeling path for the motor's brake coil. The channel control module is used to acquire channel signals from the multi-channel module and perform abnormal interlock control operations based on the acquired channel signals.

2. The novel elevator brake power supply safety control device according to claim 1, characterized in that, The multi-channel module includes: The first channel is used to control the main and secondary sides of the transformer. The second channel is used to realize the switching control of the brake circuit and the adjustable control of voltage and current; The third channel is used to implement the contactor output function.

3. A novel safety control method for elevator brake power supply, characterized in that, Specifically, it includes: Elevator brake power control is achieved through multiple channels. During the elevator brake power control process, a freewheeling circuit is used to provide a freewheeling path for the motor brake coil. The system collects signals from each channel in real time and analyzes and judges the collected signals. When any abnormality is detected in any channel signal, an abnormal interlock control operation is executed.

4. The novel elevator brake power supply safety control method according to claim 3, characterized in that, The method of controlling the elevator brake power supply based on multiple channels specifically includes: Set up independent first, second, and third channels; Based on the first channel, the power transmission and conversion of the transformer's main and secondary sides are controlled to provide basic power support for the elevator brake power supply; Based on the second-channel switching brake circuit, and according to the requirements of different brake models, adjustable control of voltage and current is achieved; Based on the output of the third channel analog contactor, a stable control signal is output.

5. The novel elevator brake power supply safety control method according to claim 3, characterized in that, The provision of a freewheeling path for the motor brake coil via the freewheeling circuit specifically includes: Connect the freewheeling circuit in parallel with the motor brake coil; When the elevator brake power supply is in normal power supply state, the freewheeling circuit is not conducting, and the motor brake coil works normally under the power supply drive; when the elevator brake power supply is cut off, the freewheeling circuit immediately conducts, providing a low impedance current path for the motor brake coil.

6. The novel elevator brake power supply safety control method according to claim 3, characterized in that, The system involves real-time acquisition of signals from each channel and analysis of the acquired signals. When an anomaly is detected in any channel signal, an anomaly interlock control operation is executed, specifically including: Real-time acquisition of status signals from the first, second, and third channels; The system analyzes and judges the collected status signals based on a preset hierarchical fault handling mechanism to determine whether there are any abnormalities in each status signal. When an abnormality is determined, an abnormality interlock control operation is immediately executed. The hierarchical fault handling mechanism includes a single-channel fault logic processing operation mechanism, a dual-channel fault logic processing operation mechanism, and a three-channel fault logic processing operation mechanism.

7. The novel elevator brake power supply safety control method according to claim 6, characterized in that, The single-channel fault logic processing mechanism analyzes and judges the collected status signals, specifically including: Based on the current channel's security logic rules, a chip select signal corresponding to each status signal is generated. The chip select signal is used to uniquely identify the valid signal that needs to be retained. The acquired status signals are filtered and processed using the chip select signal to obtain valid signals that are directly related to the current channel security logic; The filtered valid signals are subjected to real-time pairwise cross operations to obtain the final judgment value; If the final judgment value exceeds the preset normal threshold range, the current channel is determined to be abnormal.

8. The novel elevator brake power supply safety control method according to claim 6, characterized in that, The dual-channel fault logic processing mechanism analyzes and judges the collected status signals, specifically including: Based on preset dual-channel security logic rules, a chip select signal group is generated for different combinations of state signals of the two channels. This chip select signal group is used to match the valid signal pairs required for dual-channel interactive security judgment. The chip select signal group is matched with the status signals acquired by the two channels to extract the valid signal pairs required for dual-channel interactive security judgment. The extracted valid signal pairs are subjected to real-time cross-comparison calculation to obtain the cross-comparison calculation result. If the cross-comparison calculation result exceeds the preset dual-channel safety coordination threshold range, it is determined that there is a dual-channel fault.

9. The novel elevator brake power supply safety control method according to claim 6, characterized in that, The three-channel fault logic processing mechanism analyzes and judges the collected status signals, specifically including: The preset three-channel global security logic strategy generates a chip select signal system adapted to complex three-channel security judgment scenarios. This chip select signal system is used to match the effective signal combination necessary for three-channel interactive security analysis. The chip select signal system is used to filter and match the status signals of the three channels to extract the effective signal combination necessary for the three-channel interactive security analysis. For the extracted set of valid signals, multidimensional comprehensive operation and analysis are carried out to obtain the multidimensional comprehensive operation and analysis results. If the multidimensional comprehensive operation and analysis results exceed the preset three-channel safe operation threshold range, it is determined that there is a three-channel fault.

10. A computing device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the novel elevator brake power supply safety control method according to any one of claims 3-9.

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