Elevator brake monitoring circuit and device

Abstract

The utility model discloses an elevator brake monitoring circuit and device, relates to the technical field of elevator braking, and discloses the elevator brake monitoring circuit which comprises a signal monitoring module, a signal conversion module and a control module. The signal monitoring module is connected with the control module through the signal conversion module. The braking force and other key parameters of the brake are monitored through the continuous signal monitoring module, the parameters are converted into fault information capable of being recognized by the control module through the signal conversion module, and the circuit can find the potential braking failure risk in time. Once the control module detects abnormity, an emergency program is rapidly started, the elevator is locked, accidents are prevented, and therefore the safety of passengers and equipment is protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of elevator brake technology, in particular to an elevator brake monitoring circuit and device. BACKGROUND

[0002] In modern urban life, elevators have become an indispensable means of transportation in high-rise buildings. In order to ensure the safe operation of elevators in various situations, the elevator manufacturing and installation standards clearly stipulate a number of key requirements, among which the design of the brake mechanical components is particularly critical. The elevator standard requires that the brake mechanical components of each elevator should be installed in at least two or more groups. The original intention of this design is to build a redundant system, which aims to ensure that when one group of mechanical components fails due to various reasons, the remaining mechanical components can still respond quickly and effectively slow down the car running at the rated speed with full load to a safe state, thereby avoiding potential falling risks.

[0003] However, in actual operation, the simultaneous failure of multiple independent elevator brake mechanical components is extremely rare. The failure of the brake is often a gradual process rather than a sudden complete collapse. During this process, the brake will go through a series of performance decline signs, which are often closely related to environmental factors such as wear and tear of brake elements, dirt intrusion, and temperature changes.

[0004] Wear and tear of brake mechanical components is one of the common causes of brake failure. When intermittent blocking occurs in one group of brake mechanical components, it means that the component is already in an unstable state. Blocking can cause the brake to fail to smoothly open or close. If the brake cannot be opened, the group of mechanical components will remain in the braking state during elevator operation, which not only exacerbates the wear and tear of the components, but also can cause the brake to overheat, deform, or even break. If the brake cannot be closed, it means that the brake cannot provide sufficient braking force when needed, resulting in a decrease in the braking capacity of the elevator and increasing the risk of safety accidents.

[0005] If the above abnormal conditions are not discovered and handled in a timely manner, other mechanical components may also gradually fail as the wear and tear intensifies and dirt accumulates. Once multiple groups of brake mechanical components fail simultaneously, the elevator will lose effective braking capacity, which can lead to serious accidents such as car toppling, squatting, or shearing. These accidents not only cause property damage, but also can endanger the lives of passengers. INVENTION CONTENTS

[0006] The main purpose of the present application is to provide an elevator brake monitoring circuit and device, which aims to solve the technical problem that the non-closing or non-opening operation of the brake can lead to drag brake operation and mechanical component failure, causing safety accidents.

[0007] To achieve the above object, the application provides an elevator brake monitoring circuit, which comprises a signal monitoring module, a signal conversion module and a control module; the signal monitoring module is connected with the signal conversion module; the signal conversion module is further connected with the control module; the signal monitoring module is used for detecting the braking force of the brake mechanical structure and generating a braking signal based on the braking force and transmitting the braking signal to the signal conversion module; the signal conversion module is used for generating fault information based on the braking signal and outputting the fault information to the control module when the braking signal is out of a preset range; and the control module is used for controlling the elevator to enter a locking state after receiving the fault information.

[0008] In an embodiment, the signal monitoring module comprises a signal acquisition sub-module and a brake detection sub-module; the signal acquisition sub-module and the brake detection sub-module are respectively connected with the signal conversion module; the signal acquisition sub-module is used for detecting the braking force of the brake mechanical structure and generating a braking signal based on the braking force and transmitting the braking signal to the signal conversion module; the brake detection sub-module is used for detecting the working state of the brake and outputting a first preset range signal or a second preset range signal to the signal conversion module when the working state of the brake is in an open state or a closed state; and the signal conversion module is further used for adjusting the preset range to a first preset range or a second preset range based on the received first preset range signal or second preset range signal.

[0009] In an embodiment, the signal conversion module comprises a first judgment sub-module and a first conversion sub-module; the first judgment sub-module is respectively connected with the signal monitoring module and the first conversion sub-module; the first conversion sub-module is further connected with the control module; the first judgment sub-module is used for receiving the braking signal and outputting a conversion signal to the first conversion sub-module when the braking signal is out of a preset range; and the first conversion sub-module is used for generating fault information and outputting the fault information to the control module after receiving the conversion signal.

[0010] In an embodiment, the brake detection sub-module comprises an elevator brake contactor and a brake relay; a first end of the elevator brake contactor is connected with a working power supply, a second end of the elevator brake contactor is connected with a first end of the brake relay; a second end of the brake relay is grounded; contacts of the brake relay are arranged in the first judgment sub-module and the first conversion sub-module; and the elevator brake contactor controls the brake relay to be electrified to change the working state of the contacts of the brake relay when the brake is in an open state.

[0011] In an embodiment, the first judging sub-module comprises a first relay, a second relay, a first switch and a second switch; the first switch and the second switch are contacts of the holding brake relay; the contacts of the first relay and the second relay are arranged in the first conversion sub-module; the first end of the first switch is connected with the signal collecting sub-module and the first end of the second switch respectively; the second end of the first switch is connected with the first end of the first relay; the second end of the first relay is grounded; the second end of the second switch is connected with the first end of the second relay; and the second end of the second relay is grounded.

[0012] In an embodiment, the first conversion sub-module comprises a third switch, a fourth switch, a first relay switch and a second relay switch; the third switch and the fourth switch are contacts of the holding brake relay; the first relay switch and the second relay switch are contacts of the first relay and the second relay respectively; the first end of the third switch is connected with the first end of the fourth switch and the control module respectively; the second end of the third switch is connected with the first end of the first relay switch; the second end of the first relay switch is connected with a working power supply; the second end of the fourth switch is connected with the first end of the second relay switch; and the second end of the second relay switch is connected with the working power supply.

[0013] In an embodiment, the signal collecting sub-module comprises a first pressure sensor and a first voltage-current converter; the first pressure sensor is connected with the first voltage-current converter; the first voltage-current converter is further connected with the first judging sub-module; the first pressure sensor is used for detecting a brake push rod braking force and converting the braking force into a first voltage signal; and the first voltage-current converter is used for converting the first voltage signal into a first current signal and transmitting the first current signal to the first judging sub-module.

[0014] In an embodiment, the signal collecting sub-module further comprises a second pressure sensor and a second voltage-current converter; the signal collecting sub-module further comprises a second judging sub-module and a second conversion sub-module; the second pressure sensor is connected with the second voltage-current converter; the second voltage-current converter is connected with the second judging sub-module; the second judging sub-module is further connected with the second conversion module; the second conversion module is further connected with the control module; the first pressure sensor and the second pressure sensor are respectively installed on both sides of a brake push rod; the second judging sub-module and the first judging sub-module are arranged identically, and the second conversion module and the first conversion module are arranged identically; and the control module is further used for controlling the elevator to enter a locking state after receiving fault information output by the second conversion module.

[0015] In an embodiment, the signal monitoring module comprises: pressure sensors; each pressure sensor is fixedly connected with an adjusting screw of the brake mechanical structure through a sensor base; the connecting line of each pressure sensor is connected with a voltage-current converter through a through hole of the adjusting screw; or, the connecting line of each pressure sensor is connected with the voltage-current converter through a side slot of the sensor base.

[0016] In an embodiment, the elevator brake monitoring circuit further comprises: a display module; the display module is connected with the signal conversion module; the signal conversion module is further used for transmitting the brake signal to the display module; and the display module displays a pressure value based on the brake signal.

[0017] In addition, in order to achieve the above-mentioned purpose, the application further provides an elevator brake monitoring device, which applies the elevator brake monitoring circuit as described above.

[0018] The one or more technical solutions provided by the application have at least the following technical effects:

[0019] The brake force and other key parameters of the brake are monitored by the continuous signal monitoring module, and the parameters are converted into fault information recognizable by the control module by the signal conversion module, so that the circuit can timely find potential brake failure risks. Once the control module detects an abnormality, the emergency program is started rapidly to lock the elevator, preventing accidents from happening, thereby protecting the safety of passengers and equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or in the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced here. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0022] Figure 1 A structural block diagram is provided for the first embodiment of the elevator brake monitoring circuit of the application;

[0023] Figure 2 A control logic diagram is provided for the first embodiment of the elevator brake monitoring circuit of the application;

[0024] Figure 3 A detailed structural block diagram is provided for the first embodiment of the elevator brake monitoring circuit of the application;

[0025] Figure 4The structural block diagram provided for the second embodiment of the elevator brake monitoring circuit of the present application;

[0026] Figure 5 The circuit diagram of the elevator brake monitoring circuit provided for the second embodiment of the present application;

[0027] Figure 6 The circuit diagram of the elevator brake monitoring circuit provided for the second embodiment of the present application;

[0028] Figure 7 The schematic diagram of the sensor arrangement involved in the elevator brake monitoring circuit in the embodiments of the present application.

[0029] Explanation of reference numerals:

[0030] Reference numerals Description Reference numerals Description 10 Signal monitoring module 30 Control module 11 Signal acquisition submodule 40 Display module 12 Brake detection submodule J1 to J12 First to twelfth switches 20 Signal conversion module AI1 to AI4 First to fourth relays 21 First judgment submodule DO1 to DO4 First to fourth relay switches 22 First conversion submodule BC Elevator brake contactor 23 Second judgment submodule J Brake relay 24 Second conversion submodule A1 to A3 First to third intervals

[0031] The purpose implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0032] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and do not limit the present application.

[0033] In order to better understand the technical solutions of the present application, the following will be described in detail in conjunction with the drawings and specific embodiments of the specification.

[0034] In reality, the failure of an elevator brake is often a gradual process rather than a sudden and complete collapse. During this process, the brake will experience a series of performance decline signs, which are usually closely related to environmental factors such as wear of brake components, intrusion of dirt, and temperature changes.

[0035] Wear of brake mechanical components is one of the common causes of brake failure. When one set of brake mechanical components appears intermittent blocking, it means that the component is already in an unstable state. Blocking can cause the brake to fail to smoothly open or close. If the brake cannot be opened, the set of mechanical components will continue to be in the braking state during elevator operation, which not only aggravates the wear of the components, but also can cause the brake to overheat, deform or even break. If the brake cannot be closed, it means that the brake cannot provide sufficient braking force when needed, resulting in a decrease in the braking capacity of the elevator and increasing the risk of safety accidents.

[0036] If the above abnormal situation is not discovered and handled in time, other mechanical components may also gradually fail as wear and tear and accumulation of dirt intensify. Once multiple sets of brake mechanical components fail simultaneously, the elevator will lose effective braking capacity, which may lead to serious accidents such as car top collision, squatting or shearing. These accidents not only cause property loss, but also endanger the lives of passengers.

[0037] Based on this, the elevator brake monitoring circuit provided by the embodiments of the present application comprises Figure 1 , Figure 1 The structural block diagram provided by the first embodiment of the elevator brake monitoring circuit of the present application.

[0038] In the present embodiment, the elevator brake monitoring circuit comprises a signal monitoring module 10, a signal conversion module 20 and a control module 30. Among them, the signal monitoring module 10 is connected to the signal conversion module 20; the signal conversion module 20 is also connected to the control module 30.

[0039] It should be noted that the signal monitoring module 10, the signal conversion module 20 and the control module 30 are connected in sequence to build an efficient information transmission and processing chain. This design ensures that information can flow smoothly between the three modules, thereby realizing real-time monitoring and timely response to the state of the elevator brake.

[0040] It should be noted that the signal monitoring module 10, as the starting point of the information flow, is responsible for accurately capturing various state information of the elevator brake. Subsequently, these raw signals are transmitted to the signal conversion module 20. In this module, the signals undergo necessary amplification, filtering and format conversion and other processing steps. Finally, the converted signals are sent to the control module 30. As the end point of the information flow, the control module 30 undertakes the important responsibility of analyzing signals, judging states and executing processing measures. Once potential risks are detected, the control module 30 will immediately trigger the alarm system, or even directly stop the operation of the elevator, to effectively prevent accidents from happening.

[0041] Specifically, the signal monitoring module 10 is configured to detect the braking force of the mechanical structure of the brake and generate a braking signal based on the braking force and transmit the braking signal to the signal conversion module 20.

[0042] It can be understood that when the brake is working normally, its mechanical structure will generate a certain braking force to ensure that the elevator can stop quickly and smoothly when needed. The signal monitoring module 10 can capture the changes of this braking force in real time through high-precision sensors or other detection means.

[0043] It can be understood that when the signal monitoring module 10 detects the braking force, it generates a braking signal based on this information. This signal is an electrical signal that carries key information about the size of the braking force, the trend of change, etc. This braking signal is then transmitted to the signal conversion module 20 for further processing and analysis.

[0044] Specifically, the signal conversion module 20 is configured to generate fault information based on the braking signal when the braking signal is outside the preset range and output the fault information to the control module 30.

[0045] It can be understood that the signal conversion module 20 has a series of parameters or thresholds about the normal range of the braking signal preset inside. These parameters or thresholds are set according to the design specifications, working conditions and safety standards of the elevator brake, aiming to ensure that the brake can maintain stable braking performance under various working conditions.

[0046] It can be understood that when the signal conversion module 20 receives the braking signal, it immediately compares and judges these signals. If the value of the braking signal is within the preset normal range, the signal conversion module 20 will consider these signals as normal and can continue to transmit them to the control module 30 for subsequent processing.

[0047] However, if the value of the braking signal exceeds the preset normal range, i.e. is outside the preset range, the signal conversion module 20 will recognize this as an abnormal situation and generate a fault information based on this braking signal. This fault information can contain specific details about the abnormal braking signal, such as the size of the abnormal value, the duration, etc., or the fault type and location, etc. Then, the signal conversion module 20 outputs this fault information to the control module 30.

[0048] Specifically, the control module 30 is configured to control the elevator to enter a locked state after receiving the fault information.

[0049] It can be understood that the fault information usually contains detailed information about the abnormal state of the brake, such as insufficient braking force, overheating or severe wear of the brake, etc. These information are crucial for the control module 30, as they directly indicate the possible problems and risks of the elevator braking system.

[0050] It can be understood that after receiving the fault information, the control module 30 will immediately start the preset safety protection program. The primary goal of this program is to control the elevator to enter a locked state, i.e. to stop all movements of the elevator and prevent it from restarting. The locked state ensures that the elevator will not continue to run when the braking system fails, thereby avoiding possible accidents such as top collision, squatting or shearing.

[0051] It can be understood that in order to realize the locking state, the control module 30 can send an emergency stop signal to the drive system of the elevator, cut off the power supply or activate the brake device. At the same time, it can also start the alarm system in the elevator to warn the passengers and inform the elevator maintenance personnel or managers to troubleshoot and repair.

[0052] It can be understood that after the elevator enters the locking state, the control module 30 can record the fault information, including the time, location, type of the fault, and the measures taken. These information is crucial for subsequent fault analysis and improvement, which helps the elevator maintenance personnel better understand the performance state of the brake system and take corresponding maintenance measures to prevent similar faults from occurring again.

[0053] Based on the above, the control logic of the scheme is further given in this embodiment, please refer to Figure 2 , Figure 2 The control logic diagram provided for the first embodiment of the elevator brake monitoring circuit of the present application.

[0054] It should be noted that the signal monitoring module 10 selects the pressure sensor device, and at this time the pressure signal is the brake signal. However, when the brake is opened, due to the influence of environmental temperature, power supply voltage and other factors, the pressure sensor has zero drift, and the pressure value when the brake is opened may not be zero, but a small value, so a small value of the maximum allowed opening pressure is set. The value between the maximum allowed opening pressure and the minimum opening pressure (which can be zero or negative) is defined as the first interval A1.

[0055] It should be noted that when the brake is closed, considering that the braking force should have a reasonable interval and the influence of zero drift, a minimum allowed closing pressure is set, and the value between the minimum allowed closing pressure and the maximum pressure of the brake is defined as the third interval A3, and the value between the minimum allowed closing pressure and the maximum allowed opening pressure is defined as the second interval A2.

[0056] It should be noted that at the output end, the first relay switch DO1 and the second relay switch DO2 are set as two output contacts to output signals to the mainboard, i.e. the control module 30 of the present application.

[0057] It can be understood that the output signal of the first relay switch DO1 is consistent with the original micro switch output signal, and the second relay switch DO2 is an added output signal for fault judgment.

[0058] When the elevator starts and stops, the mainboard detects the second relay switch DO2 signal, if the pressure signal value is not in the second interval A2, the elevator normal working signal is outputted to be closed (or disconnected), if the pressure signal value is in the second interval A2, the elevator abnormal working signal is outputted to be disconnected (or closed), the elevator reports a fault and is locked, and the elevator can continue to run after the fault is eliminated.

[0059] It can be understood that when the elevator starts and the brake is opened, the mainboard detects the signal of the first relay switch DO1, if the pressure signal is in the first interval A1, the first relay switch DO1 outputs a disconnected (or closed) signal, which is consistent with the normal output signal of the elevator, and the elevator starts normally; otherwise, the first relay switch DO1 outputs a closed (or disconnected) signal, if the pressure signal is in the third interval A3, the closed (or disconnected) signal outputted by the first relay switch DO1 is different from the normal output signal, and the mainboard reports a fault and locks the elevator. If the pressure signal is in the second interval A2, the disconnected (or closed) signal outputted by the second relay switch DO2 is different from the normal output signal, and the mainboard also reports a fault and locks the elevator, and the elevator can continue to run after the fault is eliminated.

[0060] It can be understood that when the elevator stops and the brake is closed, the mainboard detects the signal of the first relay switch DO1, if the pressure signal is in the third interval A3, the first relay switch DO1 outputs a closed (or disconnected) signal, which is consistent with the normal output signal of the elevator, and the elevator stops normally; otherwise, the first relay switch DO1 outputs a disconnected (or closed) signal; if the pressure signal is in the first interval A1, the disconnected (or closed) signal outputted by DO1 is different from the normal output signal, and the first relay switch DO1 makes the mainboard report a fault and lock the elevator. If the pressure signal is in the second interval A2, the second relay switch DO2 makes the mainboard report a fault and lock the elevator, and the elevator can continue to run after the fault is eliminated.

[0061] In the embodiment, the braking force and other key parameters of the brake are continuously monitored by the signal monitoring module, and the parameters are converted into fault information recognizable by the control module through the signal conversion module, so that the circuit can timely discover potential brake failure risks. Once the control module detects an abnormality, it quickly starts an emergency program to lock the elevator and prevent accidents from happening, thereby protecting the safety of passengers and equipment.

[0062] Based on the above, an embodiment of further optimizing the structure of the elevator brake monitoring circuit is given, please refer to Figure 3 , Figure 3 The detailed structure block diagram provided for the first embodiment of the elevator brake monitoring circuit of the present application.

[0063] In the embodiment, the signal monitoring module 10 comprises a signal acquisition submodule 11 and a brake detection submodule 12; the signal acquisition submodule 11 and the brake detection submodule 12 are connected to the signal conversion module 20 respectively.

[0064] It should be noted that the signal acquisition submodule 11 is configured to detect the braking force of the brake mechanical structure and generate a braking signal based on the braking force and transmit the braking signal to the signal conversion module 20.

[0065] It should be noted that the signal acquisition submodule 11 can comprise a pressure sensor and a voltage-current converter. The pressure sensor is configured to monitor the pressure generated by the brake during braking in real time, so as to accurately capture the change of the braking force and convert the change into an electric signal. The voltage-current converter amplifies and converts the electric signal (usually weak voltage or current signal) output by the pressure sensor, so as to generate a braking signal meeting the input requirement of the signal conversion module 20.

[0066] It can be understood that through the signal acquisition submodule 11, real-time and accurate monitoring of the braking force of the brake mechanical structure can be realized, so as to provide reliable data basis for subsequent signal processing and judgment.

[0067] It should be noted that the brake detection submodule 12 is configured to detect the working state of the brake and output a first preset range signal or a second preset range signal to the signal conversion module 20 when the working state of the brake is in an open state or a closed state.

[0068] It can be understood that since the braking force of the brake is different in the open state and the closed state, different ranges need to be preset for the two states respectively for judgment. When the brake is in the open state, the mechanical structure of the brake will gradually release the braking of the elevator car or the counterweight, so that the elevator can be started and run. The braking force exhibited by the brake will gradually decrease until a stable running braking force level is reached. Therefore, the brake detection submodule 12 will preset a first preset range signal matched with the change of the braking force in the open state.

[0069] It can be understood that when the brake is in the closed state, the mechanical structure of the brake will tightly hold the elevator car or the counterweight to ensure that the elevator will not move unexpectedly in the stationary state. At this time, the braking force exhibited by the brake will be relatively large to provide sufficient braking torque to maintain the stability of the elevator. Therefore, the brake detection submodule 12 will preset a second preset range signal matched with the braking force in the closed state.

[0070] It should be noted that the signal conversion module 20 is also configured to adjust the preset range to the first preset range or the second preset range based on the received first preset range signal or the second preset range signal.

[0071] It can be understood that the first preset range is generally matched with the change of the braking force when the brake is in the open state. When the brake is gradually opened from the closed state, its mechanical structure releases the brake on the elevator car or the counterweight, resulting in a gradual decrease in the braking force. The first preset range is used to capture the range of changes in the braking force during this process. If the braking force signal detected by the brake detection submodule falls within the first preset range, it can be determined that the brake is in the open state or is transitioning from the closed state to the open state.

[0072] It can be understood that the second preset range is matched with the braking force level when the brake is in the closed state. When the brake is in the closed state, its mechanical structure tightly holds the elevator car or the counterweight to provide sufficient braking torque to maintain the stability of the elevator. At this time, the braking force exhibited by the brake will be relatively large. If the braking force signal detected by the brake detection submodule falls within the second preset range, it can be determined that the brake is in the closed state or is transitioning from the open state to the closed state.

[0073] Specifically, the first preset range and the second preset range can be understood as the first interval A1 and the third interval A2 described above. The setting of the preset range needs to consider multiple factors, including the type, specification, use environment of the brake, and the safety requirements of the elevator, etc. Generally, these preset ranges will be strictly tested and verified to ensure that they can accurately reflect the actual working state of the brake. Herein will not be described in detail.

[0074] Based on the above, the present application proposes a refined embodiment to further optimize the structure of the elevator brake monitoring circuit. Please refer to Figure 4 , Figure 4 The structural block diagram provided for the second embodiment of the elevator brake monitoring circuit of the present application.

[0075] In this embodiment, the signal conversion module 20 includes a first judgment submodule 21 and a first conversion submodule 22; the first judgment submodule 21 is connected to the signal monitoring module 10 and the first conversion submodule 22 respectively; and the first conversion submodule 22 is further connected to the control module 30.

[0076] It should be noted that the first judgment submodule 21 is configured to receive the braking signal and output a conversion signal to the first conversion submodule when the braking signal is outside the preset range. The first conversion submodule 22 is configured to generate fault information and output it to the control module after receiving the conversion signal.

[0077] It can be understood that the conversion signal refers to a special signal output by the first judging submodule 21 in the elevator brake monitoring circuit when the brake signal (i.e., the signal reflecting the brake force of the brake) is outside the preset range. The main role of this signal is to trigger the first conversion submodule 22 to generate fault information and pass the information to the control module so that the control module takes corresponding measures to protect the safety of the elevator.

[0078] In a specific design, the conversion signal can be a relay signal. The relay signal realizes electrical isolation through the contacts of the relay, ensuring the safe isolation between the control circuit and the controlled circuit, and reducing the risk of mutual influence when the circuit fails. In the elevator brake monitoring circuit, such electrical isolation is particularly important because it can protect the monitoring circuit from the potential high voltage or high current of the brake circuit.

[0079] In addition, optocoupler signals, Hall sensor signals, and digital signal processor (DSP) output signals are also good choices.

[0080] Further, since the mechanical structure of the brake is usually push rod type, detecting the brake force at only one position often cannot accurately determine the condition of the brake. At this time, when facing two detection points, the signal conversion module 20 can also include a second judging submodule 23 and a second conversion submodule 24. The second judging submodule 23 and the first judging submodule 21 are set the same, and the second conversion module 24 and the first conversion module 22 are set the same.

[0081] It can be understood that the control module 30 is also used to control the elevator to enter a locked state after receiving the fault information output by the second conversion module 24.

[0082] Further, in this embodiment, the elevator brake monitoring circuit further includes a display module 40; the display module 40 is connected to the signal conversion module 20. The signal conversion module 20 is also used to transmit the brake signal to the display module 40; the display module 40 displays the pressure value based on the brake signal.

[0083] It can be understood that the display module 40 is connected to the signal conversion module 20 to form a complete signal transmission link. The signal conversion module 20 is not only responsible for converting the brake signal into a format that the control module 30 can recognize, but also responsible for transmitting these signals to the display module 40.

[0084] It can be understood that after the display module 40 receives the brake signal processed and decoded by the signal conversion module 20, the display module 40 will display the pressure value of the brake on its interface according to the decoded information. This value can be real-time, or it can be an average value or maximum value after certain processing.

[0085] It can be understood that the display module 40 is usually equipped with a clear display screen and an intuitive interface design, so that the user can easily read and understand the pressure value of the brake. In addition, the display module 40 can also be set up with an antenna network, upload data and provide other functions of interacting with the user, such as setting alarm thresholds, viewing historical data, etc.

[0086] It can be understood that the user can monitor the pressure change of the brake in real time through the display module 40, so as to timely discover potential faults or abnormalities, which helps to reduce the elevator downtime caused by brake failure and improve the reliability and availability of the elevator.

[0087] Based on the above, the embodiment gives a specific implementation of the second embodiment of the elevator brake monitoring circuit, including module selection and circuit connection, please refer to Figure 5 , Figure 5 is a circuit diagram of the elevator brake monitoring circuit provided in the second embodiment of the present application. Further, the structure after supplementing the display module 40 please refer to Figure 6 , Figure 6 is another circuit diagram of the elevator brake monitoring circuit provided in the second embodiment of the present application.

[0088] In this embodiment, the signal acquisition sub-module 11 includes a first pressure sensor, a second pressure sensor, a first voltage current converter and a second voltage current converter.

[0089] It should be noted that the first pressure sensor and the second pressure sensor are respectively used to detect the braking force on both sides of the brake push rod and convert the braking force into a first voltage signal and a second voltage signal. The first voltage current converter and the second voltage current converter respectively convert the first voltage signal and the second voltage signal into a first current signal and a second current signal and transmit them to the first judgment sub-module 21 and the second judgment sub-module 23 of the signal conversion module 20.

[0090] In particular, the signal acquisition submodule 11 of the present embodiment can also employ sensors and voltage amplifier devices. The sensors serve as the starting point of signal acquisition, responsible for converting the braking force into an electrical signal. However, these raw electrical signals are often weak and can be disturbed by noise, so direct processing can introduce errors. To solve this problem, the weak electrical signals output by the sensors are received by the voltage amplifier and amplified to an appropriate level, so that the subsequent design circuit can analyze and judge the braking force. Details are not described here.

[0091] It can be understood that the first pressure sensor and the second pressure sensor are respectively installed on both sides of the brake push rod for detecting the braking force generated by the brake when it is working. This helps to determine whether there is an abnormal single-sided pressure, making the monitoring more accurate, and also conforms to the existing push rod structure of the elevator brake. The sensors convert the detected braking force into corresponding voltage signals through physical principles such as piezoresistive effect, capacitance change, etc. These voltage signals are proportional to the size of the braking force, so they can be used to represent the real-time state of the braking force.

[0092] Specifically, the brake detection submodule 12 includes an elevator brake contactor BC and a brake relay J; the first end of the elevator brake contactor BC is connected to the working power supply, the second end of the elevator brake contactor BC is connected to the first end of the brake relay J; the second end of the brake relay J is grounded.

[0093] It should be noted that the contacts of the brake relay J are arranged in the first judgment submodule 21, the first conversion submodule 22, the second judgment submodule 23, the second conversion submodule 24 and the display module 40.

[0094] It should be noted that the elevator brake contactor BC controls the energization of the brake relay J to change the working state of the contacts of the brake relay J when the brake is in the open state. Among them, whether the brake relay J is energized or not is the first preset range signal and the second preset range signal. The contacts of the brake relay J include first to twelfth switches J1-J12.

[0095] Specifically, the first judging sub-module 21 comprises a first relay AI1, a second relay AI2, a first switch J1 and a second switch J2; the first switch J1 and the second switch J2 are contacts of the holding brake relay J and are controlled by the holding brake relay J; a first end of the first switch J1 is connected to the signal collecting sub-module 11 and a first end of the second switch J2 respectively; a second end of the first switch J1 is connected to a first end of the first relay AI1; a second end of the first relay AI1 is grounded; a second end of the second switch J2 is connected to a first end of the second relay AI2; and a second end of the second relay AI2 is grounded.

[0096] Similarly, the second judging sub-module 23 comprises a third relay AI3, a fourth relay AI4, a fifth switch J5 and a sixth switch J6, which are connected in the same way as the first signal receiving sub-module 22, and thus will not be described here.

[0097] Specifically, the first converting sub-module 22 comprises a third switch J3, a fourth switch J4, a first relay switch DO1 and a second relay switch DO2; the third switch J3 and the fourth switch J4 are contacts of the holding brake relay J and are controlled by the holding brake relay J; the first relay switch DO1 and the second relay switch DO2 are contacts of the first relay AI1 and the second relay AI2 respectively and are controlled by the first relay AI1 and the second relay AI2 respectively; a first end of the third switch J3 is connected to a first end of the fourth switch J4 and the control module 30 respectively; a second end of the third switch J3 is connected to a first end of the first relay switch DO1; a second end of the first relay switch DO1 is connected to a working power supply; a second end of the fourth switch J4 is connected to a first end of the second relay switch DO2; and a second end of the second relay switch DO2 is connected to the working power supply.

[0098] Similarly, the second converting sub-module 24 comprises a seventh switch J7, an eighth switch J8, a third relay switch DO3 and a fourth relay switch DO4, which are connected in the same way as the first signal outputting sub-module 23, and thus will not be described here.

[0099] It can be understood that the selection of the first relay AI1, the second relay AI2, the third relay AI3 and the fourth relay AI4, i.e. the current range of the working power supply, can determine the preset range.

[0100] The display module 40 comprises a display screen, an antenna, a ninth switch J9, a tenth switch J10, an eleventh switch J11 and a twelfth switch J12. The display screen is connected to the antenna, the ninth switch J9, the tenth switch J10, the eleventh switch J11 and the twelfth switch J12 respectively. The ninth switch J9, the tenth switch J10, the eleventh switch J11 and the twelfth switch J12 are further connected to the second end of the first relay AI1, the second end of the second relay AI2, the second end of the third relay AI3 and the second end of the fourth relay AI4 respectively.

[0101] Based on the above, the initial states of the first switch J1, the third switch J3, the fifth switch J5, the seventh switch J7, the ninth switch J9 and the eleventh switch J11 are set to be in the off state; the initial states of the second switch J2, the fourth switch J4, the sixth switch J6, the eighth switch J8, the tenth switch J10 and the twelfth switch J12 are set to be in the on state; the initial states of the first relay switch DO1 and the third relay switch DO3 are set to be in the on state; and the initial states of the second relay switch DO2 and the fourth relay switch DO4 are set to be in the off state. The working process of the above embodiment is as follows:

[0102] When the elevator starts and the brake is opened, the elevator brake contactor BC is powered on, the brake relay J on the control board is powered on, and the first switch J1 to the eighth switch J8 are all powered on and operated. Apparently, the effective lines at this time are the lines comprising the first switch J1, the third switch J3, the fifth switch J5 and the seventh switch J7, while the lines on the second switch J2, the fourth switch J4, the sixth switch J6 and the eighth switch J8 are invalid due to the corresponding contacts being disconnected. If the first pressure sensor and the second pressure sensor are forced within the first interval A1 at this time, the first relay switch DO1 and the third relay switch DO3 output the connection signal, and the elevator normally starts running; if the braking force of one of the first pressure sensor and the second pressure sensor is not within the range of the first interval A1 at this time, the first relay switch DO1 or the third relay switch DO3 outputs the off signal, and the elevator reports a fault and locks the elevator.

[0103] When the elevator stops and the brake is closed, the elevator brake contactor BC loses power, the relay J on the control board loses power, and the first to eighth switches J1-J8 all lose power. Obviously, the effective lines are the lines including the second switch J2, the fourth switch J4, the sixth switch J6, and the eighth switch J8, and the lines including the first switch J1, the third switch J3, the fifth switch J5, and the seventh switch J7 lose power because the corresponding contacts are disconnected. If the braking force of the first pressure sensor and the second pressure sensor is within the third interval A3 at this time, the second relay switch DO2 and the fourth relay switch DO4 both output the on signal, and the elevator stops normally. If the braking force of one of the first pressure sensor and the second pressure sensor is not within the third interval A3 at this time, the second relay switch DO2 or the fourth relay switch DO4 outputs the off signal, and the elevator reports a fault and locks the elevator.

[0104] Further, the pressures of the two processed pressure sensors at the opening and closing of the brake can also be set on the control board, and the pressures are controlled by the relay contacts ninth switch J9, tenth switch J10, eleventh switch J11, and twelfth switch J12 to light up and display the pressure values in the corresponding working state and position. The values can be sent to the Internet through a wired network or a wireless network to better monitor the working condition of the elevator brake.

[0105] In addition, the embodiment also provides a specific setting mode of the sensor. Please refer to Figure 7 , Figure 7 for a setting diagram of the sensor involved in the elevator brake monitoring circuit in the embodiment.

[0106] The pressure sensor is fixedly connected with the adjusting screw of the brake mechanical structure through a sensor base. The sensor base and the adjusting screw of the brake mechanical structure are designed in a split type for easy disassembly and installation. The sensor base provides a stable installation platform for the pressure sensor and ensures the reliable connection between the sensor and the adjusting screw. Through the fixed connection such as screws and bolts, it is also ensured that the sensor can accurately capture the pressure change of the brake during braking.

[0107] It should be noted that the adjusting screw is part of the brake mechanical structure and is used to adjust the braking force of the brake. By adjusting the adjusting screw, the friction force and the braking force between the brake and the elevator track can be changed. The pressure sensor fixed on the adjusting screw can monitor the influence of these adjustments on the braking force in real time.

[0108] It can be understood that the connection lines of the pressure sensor are responsible for transmitting the analog signals collected by the sensor to the voltage-current converter. These connection lines can be arranged through the through holes of the adjusting screw or the edge slots of the sensor base to ensure stable transmission of the signals.

[0109] It should be noted that the above examples are only for understanding the present application and do not constitute a limitation on the elevator brake monitoring circuit of the present application, and more forms of simple transformation based on the technical concept are within the protection scope of the present application.

[0110] The present application also provides an elevator brake monitoring device applying the elevator brake monitoring circuit as described above. The technical problem that the brake does not close or open can cause the brake dragging operation and the mechanical component failure to cause the safety accident can be solved. Compared with the prior art, the elevator brake monitoring device provided by the present application has the same beneficial effects as the elevator brake monitoring circuit provided by the above-mentioned embodiments, and other technical features in the elevator brake monitoring device are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0111] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation based on the technical concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. An elevator brake monitoring circuit, characterized by The elevator brake monitoring circuit comprises a signal monitoring module, a signal conversion module and a control module; The signal monitoring module is connected to the signal conversion module; The signal conversion module is further connected to the control module; The signal monitoring module is configured to detect a braking force of a brake mechanical structure and generate a braking signal based on the braking force and transmit the braking signal to the signal conversion module; The signal conversion module is configured to generate fault information based on the braking signal when the braking signal is outside a preset range and output the fault information to the control module; The control module is configured to control the elevator to enter a locked state after receiving the fault information.

2. The elevator brake monitor circuit of claim 1, wherein, The signal monitoring module comprises a signal acquisition submodule and a brake detection submodule; The signal acquisition submodule and the brake detection submodule are connected to the signal conversion module; The signal acquisition submodule is configured to detect a braking force of a brake mechanical structure and generate a braking signal based on the braking force and transmit the braking signal to the signal conversion module; The brake detection submodule is configured to detect a working state of the brake and output a first preset range signal or a second preset range signal to the signal conversion module when the working state of the brake is in an open state or a closed state, respectively; The signal conversion module is further configured to adjust the preset range to a first preset range or a second preset range based on the received first preset range signal or second preset range signal.

3. The elevator brake monitor circuit of claim 2, wherein, The signal conversion module comprises a first judgment submodule and a first conversion submodule; The first judgment submodule is connected to the signal monitoring module and the first conversion submodule; The first conversion submodule is further connected to the control module; The first judgment submodule is configured to receive the braking signal and output a conversion signal to the first conversion submodule when the braking signal is outside a preset range; The first conversion submodule is configured to generate fault information and output the fault information to the control module after receiving the conversion signal.

4. The elevator brake monitoring circuit of claim 3, wherein, The brake detection submodule comprises an elevator brake contactor and a brake relay; A first end of the elevator brake contactor is connected to a working power supply, and a second end of the elevator brake contactor is connected to a first end of the brake relay; A second end of the brake relay is grounded; Contacts of the brake relay are arranged in the first judgment submodule and the first conversion submodule; The elevator brake contactor controls the brake relay to be powered on to change the working state of the contacts of the brake relay when the brake is in an open state.

5. The elevator brake monitoring circuit of claim 4, wherein, The first judgment submodule comprises a first relay, a second relay, a first switch and a second switch; The first switch and the second switch are contacts of the brake relay, and contacts of the first relay and the second relay are arranged in the first conversion submodule; A first end of the first switch is connected to the signal acquisition submodule and a first end of the second switch, respectively; a second end of the first switch is connected to a first end of the first relay; and a second end of the first relay is grounded. The second end of the second switch is connected to the first end of the second relay, and the second end of the second relay is grounded. The first conversion sub-module comprises a third switch, a fourth switch, a first relay switch and a second relay switch. The third switch and the fourth switch are contacts of the clutch relay, and the first relay switch and the second relay switch are contacts of the first relay and the second relay respectively. The first end of the third switch is connected to the first end of the fourth switch and the control module respectively, the second end of the third switch is connected to the first end of the first relay switch, and the second end of the first relay switch is connected to a working power supply. The second end of the fourth switch is connected to the first end of the second relay switch, and the second end of the second relay switch is connected to the working power supply.

6. The elevator brake monitoring circuit of claim 5, wherein, The signal acquisition sub-module comprises a first pressure sensor and a first voltage-current converter. The first pressure sensor is connected to the first voltage-current converter. The first voltage-current converter is further connected to the first judgment sub-module. The first pressure sensor is configured to detect a brake push rod braking force and convert the braking force into a first voltage signal. The first voltage-current converter is configured to convert the first voltage signal into a first current signal and transmit the first current signal to the first judgment sub-module.

7. The elevator brake monitoring circuit of claim 6, wherein, The signal acquisition sub-module further comprises a second pressure sensor and a second voltage-current converter, and the signal conversion module further comprises a second judgment sub-module and a second conversion sub-module. The second pressure sensor is connected to the second voltage-current converter, and the second voltage-current converter is connected to the second judgment sub-module. The second judgment sub-module is further connected to the second conversion sub-module, and the second conversion sub-module is further connected to the control module. The first pressure sensor and the second pressure sensor are respectively installed on both sides of a brake push rod. The second judgment sub-module and the first judgment sub-module are the same, and the second conversion sub-module and the first conversion sub-module are the same. The control module is further configured to control the elevator to enter a locked state after receiving fault information output by the second conversion sub-module.

8. The elevator brake monitor circuit of claim 1, wherein, The signal monitoring module comprises pressure sensors, and each pressure sensor is fixedly connected to an adjusting screw rod of a brake mechanical structure through a sensor base. The connecting line of each pressure sensor is connected to a voltage-current converter through a through hole of the adjusting screw rod. Alternatively, the connecting line of each pressure sensor is connected to a voltage-current converter through a side slot of the sensor base.

9. The elevator brake monitor circuit of claim 1, wherein, The elevator brake monitoring circuit further comprises a display module. The display module is connected to the signal conversion module. The signal conversion module is further configured to transmit the braking signal to the display module. The display module displays a pressure value based on the braking signal.

10. An elevator brake monitoring device, characterized by The elevator brake monitoring device applies the elevator brake monitoring circuit according to any one of claims 1 to 9.

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