CN212863956U - Elevator brake real-time state monitoring and early warning system - Google Patents
Elevator brake real-time state monitoring and early warning system Download PDFInfo
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- CN212863956U CN212863956U CN202022027507.XU CN202022027507U CN212863956U CN 212863956 U CN212863956 U CN 212863956U CN 202022027507 U CN202022027507 U CN 202022027507U CN 212863956 U CN212863956 U CN 212863956U
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Abstract
The utility model provides an elevator stopper real-time status monitoring and early warning system, a serial communication port, include: a tractor, a brake, a sensor subsystem, a logic subsystem and a final element subsystem; the sensor subsystem is connected with the logic subsystem; the logic subsystem is connected with the final element subsystem; the sensor subsystem includes: a sensor component; the elevator brake real-time status monitoring and early warning system comprises: the elevator system, the elevator brake, the sensor component, the input module, the logic processing module and the early warning and output module; the final element subsystem can cut off the power supply of the brake in time when a fault or danger occurs. The utility model discloses an adopt and in the safety circuit is gone into with monitored control system's output switch, solved the control to the system power, guarantee the safety of personnel and equipment.
Description
Technical Field
The utility model relates to a real-time status monitoring technology field specifically relates to an elevator stopper real-time status monitoring and early warning system.
Background
For a long time, the elevator brake widely adopts the methods of electrical detection, factory equipment detection and mechanical detection and periodic spot check integral test to ensure the normal operation of the brake. This detection method still has obvious disadvantages: (1) if a fault occurs in the detection, an accident has occurred; (2) the periodic spot check time is difficult to control the interval time, and if the interval is too long, the safety between detections cannot be ensured, and the interval is too short, which causes waste. Meanwhile, in the data analysis process, a single path is mostly used for source information data, diagnosis and early warning are carried out according to expert-based experience, and accurate quantitative analysis is lacked.
Patent document CN107814288A discloses an intelligent monitoring and early warning method for an elevator brake, which adopts a non-contact measurement method to collect key parameters and gives the running state of a machine based on SVM cluster analysis. The defects of the prior art are as follows: the monitoring system has the main functions of monitoring the running state of the brake and recording related running data, and is analyzed and judged by expert experience according to the change curve of physical parameters, so that the research on a fault early warning algorithm is lacked; meanwhile, the monitoring system is not subjected to function safety certification, and the reliability and safety in the operation process cannot be effectively guaranteed, so that the requirement of the function safety of the elevator cannot be met.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing an elevator stopper real-time status monitoring and early warning system.
According to the utility model provides a pair of elevator stopper real-time status monitoring and early warning system, include: a tractor, a brake, a sensor subsystem, a logic subsystem and a final element subsystem;
the sensor subsystem is connected with the logic subsystem;
the logic subsystem is connected with the final element subsystem;
the sensor subsystem includes: a sensor component;
the elevator brake real-time status monitoring and early warning system comprises: the elevator system, the elevator brake, the sensor component, the input module, the logic processing module and the early warning and output module;
the elevator system and the elevator brake are respectively connected with the sensor component;
the input module is connected with the sensor component;
the input module is connected with the logic processing module;
the logic processing module is connected with the early warning and output module;
the final element subsystem is connected with a brake;
the final element subsystem can cut off the power supply of the brake in time when a fault or danger occurs.
Preferably, the sensor part includes: an alternating voltage sensor, an alternating current sensor;
the alternating current voltage sensor and the alternating current sensor are respectively connected with an elevator system;
and the alternating current voltage sensor and the alternating current sensor are respectively connected with the input module.
Preferably, the sensor part includes: a displacement sensor, a temperature sensor, a direct current voltage sensor, a direct current sensor and a noise sensor;
the displacement sensor, the temperature sensor, the direct current voltage sensor, the direct current sensor and the noise sensor are respectively connected with the elevator brake;
and the displacement sensor, the temperature sensor, the direct-current voltage sensor, the direct-current sensor and the noise sensor are respectively connected with the input module.
Preferably, the sensor subsystem further comprises: a rotary encoder;
the rotary encoder is connected with an elevator system;
the rotary encoder is connected with the input module.
Preferably, the sensor subsystem further comprises: a microswitch;
the microswitch is connected with an elevator brake;
the micro switch is connected with the input module.
Preferably, the method further comprises the following steps: a direct current transmitter, a perforated alternating current transmitter;
the alternating current voltage sensor, the alternating current sensor, the direct current voltage sensor and the direct current sensor are connected in parallel to monitor the coil voltage of the brake on the coil positive electrode and the coil negative electrode of the brake;
the direct current transducer is connected in series on a circuit of the brake to monitor current;
and the perforated alternating current transmitter monitors the output current of the traction machine.
Preferably, the temperature sensor is a J-type wire thermocouple.
Preferably, the displacement sensor is a laser displacement sensor.
Preferably, the rotary encoder is a hadham absolute encoder.
Preferably, the logic subsystem comprises: MCU component, power module, power monitoring module, watchdog module and storage module.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses an adopt with encoder reading, stopper clearance, friction noise, stopper voltage, stopper electric current, coil temperature and micro-gap switch response time as the data object of monitored control system collection, solved discernment braking distance undersize, the air gap is too big, the friction disc wearing and tearing, coil voltage is low excessively, the coil current is low excessively, the coil is overheated, the problem of physical phenomena such as coil residual voltage, electric current and spring force are not enough;
2. the utility model adopts the output switch of the monitoring system to be connected into the safety loop, thereby solving the control of the system power supply and ensuring the safety of personnel and equipment;
3. the utility model discloses an adopt owner, accomplish the function of control stopper running state simultaneously from dual system, solved when random failure appears in one of two passageways, the system will get into safe state's problem.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic view of the overall structure frame of the present invention.
Fig. 2 is a hardware overall framework schematic diagram of an elevator brake monitoring system in an embodiment of the present invention.
Fig. 3 is a schematic diagram of an overall framework of a sensor subsystem according to an embodiment of the present invention.
Fig. 4 is a schematic view of the overall layout of the sensor according to the embodiment of the present invention.
Fig. 5 is a schematic diagram of a design block of an output circuit module according to an embodiment of the present invention.
Fig. 6 is the elevator safety circuit in the embodiment of the present invention.
In the figure:
k-elevator brake monitoring system output switch; BRAKE for elevator
M-traction machine KM 1-traction machine contactor
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
According to the utility model provides a pair of elevator stopper real-time status monitoring and early warning system, include: a tractor, a brake, a sensor subsystem, a logic subsystem and a final element subsystem;
the sensor subsystem is connected with the logic subsystem;
the logic subsystem is connected with the final element subsystem;
the sensor subsystem includes: a sensor component;
the elevator brake real-time status monitoring and early warning system comprises: the elevator system, the elevator brake, the sensor component, the input module, the logic processing module and the early warning and output module;
the elevator system and the elevator brake are respectively connected with the sensor component;
the input module is connected with the sensor component;
the input module is connected with the logic processing module;
the logic processing module is connected with the early warning and output module;
the final element subsystem is connected with a brake;
the final element subsystem can cut off the power supply of the brake in time when a fault or danger occurs.
Preferably, the sensor part includes: an alternating voltage sensor, an alternating current sensor;
the alternating current voltage sensor and the alternating current sensor are respectively connected with an elevator system;
and the alternating current voltage sensor and the alternating current sensor are respectively connected with the input module.
Preferably, the sensor part includes: a displacement sensor, a temperature sensor, a direct current voltage sensor, a direct current sensor and a noise sensor;
the displacement sensor, the temperature sensor, the direct current voltage sensor, the direct current sensor and the noise sensor are respectively connected with the elevator brake;
and the displacement sensor, the temperature sensor, the direct-current voltage sensor, the direct-current sensor and the noise sensor are respectively connected with the input module.
Preferably, the sensor subsystem further comprises: a rotary encoder;
the rotary encoder is connected with an elevator system;
the rotary encoder is connected with the input module.
Preferably, the sensor subsystem further comprises: a microswitch;
the microswitch is connected with an elevator brake;
the micro switch is connected with the input module.
Preferably, the method further comprises the following steps: a direct current transmitter, a perforated alternating current transmitter;
the alternating current voltage sensor, the alternating current sensor, the direct current voltage sensor and the direct current sensor are connected in parallel to monitor the coil voltage of the brake on the coil positive electrode and the coil negative electrode of the brake;
the direct current transducer is connected in series on a circuit of the brake to monitor current;
and the perforated alternating current transmitter monitors the output current of the traction machine.
Preferably, the temperature sensor is a J-type wire thermocouple.
Preferably, the displacement sensor is a laser displacement sensor.
Preferably, the rotary encoder is a hadham absolute encoder.
Preferably, the logic subsystem comprises: MCU component, power module, power monitoring module, watchdog module and storage module.
The elevator brake monitoring system can monitor temperature, noise, electric signals, encoder signals and microswitch signals in real time, and realize random fault judgment of the elevator brake and fault early warning of brake failure. And meets the design requirements of hardware safety integrity for SIL2 (safety integrity level, SIL) second level).
Specifically, in one embodiment, the elevator brake real-time status monitoring and early warning system is divided into three subsystems, namely a sensor subsystem, a logic subsystem and a final element subsystem, according to the functional requirements and reliability requirements of the monitoring system.
The sensor subsystem of the elevator brake monitoring system mainly comprises a thermocouple, a voltage and current sensor, a noise sensor, a laser displacement sensor, an encoder and a microswitch signal, and is respectively used for measuring the changes of analog quantity and digital quantity such as coil temperature, voltage and current, brake noise, abrasion degree, brake distance, brake response time and the like in the brake contracting and releasing processes.
1. A voltage current sensor. The voltage and current sensor is connected in parallel to monitor the voltage of the brake coil on the positive pole and the negative pole of the brake coil; the direct current transducer is connected in series on the brake circuit to monitor the current; the perforated alternating current transmitter monitors the output current of the traction machine.
2. A temperature sensor. A J-shaped linear thermocouple with high sensitivity, stability and uniformity is used as a temperature sensor and is embedded into a coil to detect the high temperature generated by the coil under the continuous power supply when an elevator brake works.
3. A noise sensor. In the brake from normal work to the inefficacy in-process, the brake shoe can produce wearing and tearing gradually, and the sound that its band-type brake produced can send the change, installs noise sensor outside the electric appliance cabinet, and mic mouth is towards the brake, and the distance sets up 5m, can monitor the unusual change (intensity of sound, audio frequency) that produces sound of band-type brake to catch the abnormal conditions of braking.
4. And a displacement sensor. The laser displacement sensor is adopted to indirectly measure the gap between the brake wheel and the brake shoe and the abrasion loss of the brake shoe.
5. An encoder. The elevator brake encoder is a Haidenhain absolute value encoder, the incremental signal output is an orthogonal sine and cosine signal, an orthogonal analog signal is converted into a pulse signal, and the orthogonal pulse signal required by people is obtained and used as the output.
6. A micro switch. The 24V digital quantity of the microswitch is provided by the PLC, and the signal is acquired by the data acquisition and control board card, and the microswitch is mainly used for the following two functions: 1. when a coil in the electromagnetic coil is electrified, the armature magnetic disc is pulled to the coil bracket, and the microswitch sends out a signal when the brake is in place, so that the brake-off response time of the brake is judged; 2. when the brake is powered off, the armature disc returns to the initial position again, the microswitch signal returns to the low level again, and the closing response time is deduced according to the low level time obtained by the chip and the power-off time of the brake.
The logic subsystem of the elevator brake monitoring system mainly comprises a high-reliability MCU, a power supply module, a power supply monitoring module, a watchdog module and a storage module.
The final element subsystem of the elevator brake monitoring system is used for timely cutting off the power supply of the traction machine and the brake when judging that a fault or a danger exists, so that the final element subsystem can be regarded as a safety relay output connected into a safety loop. The power supply of the traction machine and the brake is controlled by connecting the relay output of the system into a safety loop.
In an elevator brake monitoring system, the system is divided into a master module and a slave module, and the master module and the slave module can respectively complete the function of monitoring the running state of a brake. And the MCU of the master module and the MCU of the slave module carry out data communication interaction through the SPI. Since the two modules are identical in structure, the functions of the respective modules will be described below with reference to the main module. The AD processing module is used for receiving, collecting and processing analog quantity measured by each sensor; the optocoupler input module is used for acquiring signals of the microswitch so as to judge the brake contracting and opening action condition of the brake; the RTC module is used as a clock module and used for storing and recording the time of failure; the watchdog module is used for realizing a reset function when detecting that the MCU generates a system error; the human-computer interface is used for displaying fault codes and the residual service life of the machine; the EEPROM is used for storing fault information and elevator brake related parameters; the power supply circuit provides power for the system, and the power supply monitoring ensures that the power supply voltage state of the system is kept normal; the relay is used as an output element and is connected in the safety circuit in series, when one relay of the master module and the slave module is disconnected, the safety circuit is automatically disconnected, and the system is powered off and enters a safety state.
The design module of the output circuit is shown in fig. 5, two relays are respectively controlled by respective MCUs at a module A and a module B, and when the initialization of the two MCUs is completed and the mutual information is normal, the two relays are simultaneously opened, the safety loop is switched on, and the test is started. When one MCU can not control the relay in time due to random faults, the other MCU can feed back according to the interactive information so as to cut off the output of the relay, so that the elevator keeps a safe state, and the functional safety of the whole system can be ensured.
The chip of the minimum system module of the microcontroller selects TMS570LC4357 of Ti company, the chip is provided with a lockstep double ARM Cortex-R5F floating-point inner core, can meet the requirements of IEC 61508SIL3 safety standard, integrates ADC interfaces of 41 channels, 5 MibSPI communication interfaces, 4 UART interfaces, 168 GPIO interfaces, I2C communication and EMIF communication interfaces, and can meet the connection with other circuits. The two MCUs communicate in a MibSPI mode, and according to requirements of a PESSRAL circuit, when one of the two channels has random faults, the system enters a safe state. In the method, a main system sends query requests to an auxiliary MCU at the beginning and the end of each cycle, similarly, the auxiliary MCU waits for the MCU to send the query requests at the beginning and the end of each cycle, and if two pieces of information are inconsistent or one MCU system falls into a dead cycle to cause communication failure, the system is in a safe state through relay output. By means of mutual real-time supervision of the two MCUs, the probability of random faults can be greatly reduced, and reliability is improved.
In order to guarantee reliability and safety, the integrated circuit is finally divided into A, B core boards and a bottom board, wherein A, B two identical core boards mainly comprise a minimum module of a microcontroller, an ADC input module and a storage module, the bottom board comprises the rest parts, and two groups of interfaces on the bottom board are respectively in butt joint with A, B two core boards.
The utility model discloses an adopt with encoder reading, stopper clearance, friction noise, stopper voltage, stopper electric current, coil temperature and micro-gap switch response time as the data object of monitored control system collection, solved discernment braking distance undersize, the air gap is too big, the friction disc wearing and tearing, coil voltage is low excessively, the coil current is low excessively, the coil is overheated, the problem of physical phenomena such as coil residual voltage, electric current and spring force are not enough;
the utility model adopts the output switch of the monitoring system to be connected into the safety loop, thereby solving the control of the system power supply and ensuring the safety of personnel and equipment;
the utility model discloses an adopt owner, accomplish the function of control stopper running state simultaneously from dual system, solved when random failure appears in one of two passageways, the system will get into safe state's problem.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. An elevator brake real-time condition monitoring and early warning system, comprising: a tractor, a brake, a sensor subsystem, a logic subsystem and a final element subsystem;
the sensor subsystem is connected with the logic subsystem;
the logic subsystem is connected with the final element subsystem;
the sensor subsystem includes: a sensor component;
the elevator brake real-time status monitoring and early warning system comprises: the elevator system, the elevator brake, the sensor component, the input module, the logic processing module and the early warning and output module;
the elevator system and the elevator brake are respectively connected with the sensor component;
the input module is connected with the sensor component;
the input module is connected with the logic processing module;
the logic processing module is connected with the early warning and output module;
the final element subsystem is connected with a brake;
the final element subsystem can cut off the power supply of the brake in time when a fault or danger occurs.
2. The elevator brake real-time condition monitoring and warning system of claim 1, wherein the sensor component comprises: an alternating voltage sensor, an alternating current sensor;
the alternating current voltage sensor and the alternating current sensor are respectively connected with an elevator system;
and the alternating current voltage sensor and the alternating current sensor are respectively connected with the input module.
3. The elevator brake real-time condition monitoring and warning system of claim 2, wherein the sensor component comprises: a displacement sensor, a temperature sensor, a direct current voltage sensor, a direct current sensor and a noise sensor;
the displacement sensor, the temperature sensor, the direct current voltage sensor, the direct current sensor and the noise sensor are respectively connected with the elevator brake;
and the displacement sensor, the temperature sensor, the direct-current voltage sensor, the direct-current sensor and the noise sensor are respectively connected with the input module.
4. The elevator brake real-time condition monitoring and warning system of claim 1, wherein the sensor subsystem further comprises: a rotary encoder;
the rotary encoder is connected with an elevator system;
the rotary encoder is connected with the input module.
5. The elevator brake real-time condition monitoring and warning system of claim 1, wherein the sensor subsystem further comprises: a microswitch;
the microswitch is connected with an elevator brake;
the micro switch is connected with the input module.
6. The elevator brake real-time condition monitoring and warning system of claim 3, further comprising: a direct current transmitter, a perforated alternating current transmitter;
the alternating current voltage sensor, the alternating current sensor, the direct current voltage sensor and the direct current sensor are connected in parallel to monitor the coil voltage of the brake on the coil positive electrode and the coil negative electrode of the brake;
the direct current transducer is connected in series on a circuit of the brake to monitor current;
and the perforated alternating current transmitter monitors the output current of the traction machine.
7. The elevator brake real-time condition monitoring and warning system of claim 3, wherein the temperature sensor employs a J-type wire thermocouple.
8. The elevator brake real-time condition monitoring and warning system of claim 3, wherein the displacement sensor is a laser displacement sensor.
9. The elevator brake real-time condition monitoring and warning system of claim 4, wherein the rotary encoder employs a Heidenhain absolute encoder.
10. The elevator brake real-time condition monitoring and warning system of claim 1, wherein the logic subsystem comprises: MCU component, power module, power monitoring module, watchdog module and storage module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022027507.XU CN212863956U (en) | 2020-09-16 | 2020-09-16 | Elevator brake real-time state monitoring and early warning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022027507.XU CN212863956U (en) | 2020-09-16 | 2020-09-16 | Elevator brake real-time state monitoring and early warning system |
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| CN212863956U true CN212863956U (en) | 2021-04-02 |
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| CN202022027507.XU Active CN212863956U (en) | 2020-09-16 | 2020-09-16 | Elevator brake real-time state monitoring and early warning system |
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