Elevator control system and monitoring method with self-diagnosis and self-adjustment

Abstract

The present invention provides a monitoring system for automatically monitoring elevator faults, including an input current monitoring sensor, an input rectifier bridge, a switch tube, an output current monitoring sensor, an encoder, a vibration sensor, and a main control board; the current monitoring sensor, the input rectifier bridge, the switch tube, and the output current monitoring sensor are electrically connected in sequence, and the input current monitoring sensor and the output current monitoring sensor are electrically connected to the main control board; the vibration sensor and the encoder are both connected to the main control board. Abnormal monitoring of elevator vibration is achieved, and interference is reduced by filtering the current frequency and the working frequency of the motor, thereby improving the accuracy of the elevator vibration fault prompt and ensuring the safety of elevator use.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator control systems, and in particular to an elevator control system and a monitoring method with self-diagnosis and self-adjustment. Background Art

[0002] In today's elevator systems, the current acquisition circuit and encoder signal acquisition circuit are both set with fixed hardware and software filtering parameters for one or two frequencies. When the power supply and encoder signal acquisition circuits are interfered with by multiple different frequency bands during elevator operation, the elevator system cannot effectively filter out the interference, resulting in abnormal vibration of the elevator. Summary of the invention

[0003] The first purpose of the present invention is to overcome the deficiencies of the prior art and provide a monitoring system for automatically monitoring elevator faults, which can effectively monitor elevator vibrations and provide fault prompts.

[0004] A second object of the present invention is to provide an elevator control system.

[0005] The third object of the present invention is to provide a method for monitoring elevator failures.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A monitoring system for automatically monitoring elevator faults, characterized in that it includes an input current monitoring sensor, an input rectifier bridge, a switch tube, an output current monitoring sensor, an encoder, a vibration sensor, and a main control board; the current monitoring sensor, the input rectifier bridge, the switch tube, and the output current monitoring sensor are electrically connected in sequence, and the input current monitoring sensor and the output current monitoring sensor are electrically connected to the main control board; the vibration sensor and the encoder are both connected to the main control board.

[0008] Preferably, the main control board includes an MCU and an ADC, the MCU is electrically connected to the ADC, the MCU is electrically connected to the vibration sensor and the encoder, and the ADC is electrically connected to the input current monitoring sensor and the output current monitoring sensor.

[0009] An elevator control system includes the monitoring system described above, and is characterized in that it also includes a motor, a counterweight, and a car; the vibration sensor is arranged on the car, and the encoder is arranged on the motor.

[0010] A method for monitoring elevator faults, using the elevator control system, includes the following steps: collecting the real-time vibration frequency of the elevator, judging whether the real-time vibration frequency is abnormal, if normal, the car vibration is normal, and the car vibration is continuously monitored; if abnormal, filtering the output current frequency or / and filtering the encoder input signal frequency, and then judging the real-time vibration frequency of the elevator for abnormality, and if abnormal, giving a fault prompt.

[0011] Preferably, a normal preset vibration frequency threshold of the car is set;

[0012] The vibration sensor collects the first real-time vibration frequency of the car, and the encoder collects the first real-time motor operating frequency;

[0013] The first real-time vibration frequency is compared with a preset vibration frequency threshold. If the real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the real-time vibration frequency is not within the preset vibration frequency threshold, the car vibration is abnormal;

[0014] When the car vibrates abnormally, it is determined whether the first real-time vibration frequency is the same as the first real-time motor operating frequency. If they are different, a current frequency comparison is performed, that is, the first real-time vibration frequency is compared with the output current frequency. If they are the same, the encoder is filtered.

[0015] After filtering the encoder, the first real-time vibration frequency is compared with the preset vibration frequency threshold again. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, a secondary current frequency comparison is performed;

[0016] The secondary current frequency, that is, the first real-time vibration frequency is judged again to be compared with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, the output current frequency is filtered without processing the encoder signal data; if the first real-time vibration frequency is different from the output current frequency, it is judged that the elevator vibration is abnormal and a fault prompt is given;

[0017] After filtering the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the third time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, the first real-time motor operating frequency is filtered and the output current frequency is filtered;

[0018] After filtering the first real-time motor operating frequency and the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the fourth time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal, and a fault prompt is given.

[0019] Preferably, the primary current frequency comparison includes the following steps: determining and comparing the first real-time vibration frequency with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, not processing the encoder signal, and filtering the output current frequency; if the first real-time vibration frequency is different from the output current frequency, determining that the elevator vibration is abnormal, and giving a fault prompt;

[0020] After the output current frequency is filtered, the first real-time vibration frequency is compared with the preset vibration frequency threshold. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored. If the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal and a fault prompt is given.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] By using the automatic monitoring system for elevator faults of the present invention and applying it in an elevator system to form the elevator control system of the present invention, and applying the elevator control system to implement the elevator fault monitoring method of the present invention, abnormal monitoring of elevator vibration is achieved, and interference is reduced by filtering the current frequency and the working frequency of the motor, thereby improving the accuracy of elevator vibration fault prompts and ensuring the safety of elevator use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of an elevator control system according to the present invention;

[0024] Figure 2 It is a schematic diagram of the elevator fault monitoring method of the present invention.

[0025] in:

[0026] ①-Input current monitoring sensor; ②-Input rectifier bridge; ③-Switching tube; ④-Output current monitoring sensor; ⑤-Motor; ⑥-Encoder; ⑦-Counterweight; ⑧-Car; ⑨-Vibration sensor; ⑩-Main control board. DETAILED DESCRIPTION

[0027] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0028] The monitoring system for automatically monitoring elevator faults described in the present invention includes an input current monitoring sensor, an input rectifier bridge, a switch tube, an output current monitoring sensor, an encoder, a vibration sensor, and a main control board; the current monitoring sensor, the input rectifier bridge, the switch tube, and the output current monitoring sensor are electrically connected in sequence, and the input current monitoring sensor and the output current monitoring sensor are electrically connected to the main control board; the vibration sensor and the encoder are both connected to the main control board. The main control board includes an MCU and an ADC, the MCU is electrically connected to the ADC, the MCU is electrically connected to the vibration sensor and the encoder, and the ADC is electrically connected to the input current monitoring sensor and the output current monitoring sensor.

[0029] like Figure 1 As shown, an elevator control system described in the present invention includes the monitoring system described above, and is characterized in that it also includes a motor, a counterweight, and a car; the motor drives the car to operate, and the counterweight maintains the smooth, balanced and safe ascent and descent of the car.

[0030] By setting the vibration sensor in the car and the encoder in the motor, the input current monitoring sensor collects the input current signal and transmits it to the main control board; the output current monitoring sensor collects the output current signal output to the motor and transmits it to the main control board; the encoder collects the motor operating frequency and transmits it to the main control board; the vibration sensor collects the vibration frequency of the car and transmits it to the main control board; the elevator main control board collects the input current signal, output current signal, motor operating frequency, vibration frequency and monitors them to determine if the elevator is abnormal.

[0031] See also Figure 2 As shown, a method for monitoring elevator faults described in the present invention uses an elevator control system and includes the following steps: collecting the real-time vibration frequency of the elevator, judging whether the real-time vibration frequency is abnormal, if normal, the car vibration is normal, and the vibration of the car is continuously monitored; if abnormal, filtering the output current frequency and / or filtering the encoder input signal frequency, and then judging the real-time vibration frequency of the elevator for abnormality, and if abnormal, giving a fault prompt.

[0032] The specific implementation of the above steps to achieve elevator fault monitoring and prompting process is as follows:

[0033] The preset vibration frequency threshold of the elevator car is set. The vibration frequency threshold is the empirical value and the total weighted value of the collected data in claim 1 when the elevator model is normal.

[0034] The vibration sensor collects the first real-time vibration frequency of the car, and the encoder collects the first real-time motor operating frequency.

[0035] The first real-time vibration frequency is compared with the preset vibration frequency threshold. If the real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the car vibration is continuously monitored. If the real-time vibration frequency is not within the preset vibration frequency threshold, the car vibration is abnormal.

[0036] When the car vibrates abnormally, it is determined whether the first real-time vibration frequency is the same as the first real-time motor operating frequency: if they are different, a current frequency comparison is performed, that is, the first real-time vibration frequency is compared with the output current frequency; if they are the same, the encoder is filtered.

[0037] After filtering the encoder, the first real-time vibration frequency is compared with the preset vibration frequency threshold again. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, a secondary current frequency comparison is performed.

[0038] The secondary current frequency, that is, the first real-time vibration frequency is judged again and compared with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, the output current frequency is filtered and the encoder signal data is not processed; if the first real-time vibration frequency is different from the output current frequency, it is judged that the elevator vibration is abnormal and a fault prompt is given.

[0039] After filtering the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the third time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, the first real-time motor operating frequency and the output current frequency are filtered.

[0040] After filtering the first real-time motor operating frequency and the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the fourth time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal and a fault prompt is given.

[0041] A current frequency comparison includes the following steps: determining the first real-time vibration frequency and comparing it with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, the encoder signal is not processed and the output current frequency is filtered; if the first real-time vibration frequency is different from the output current frequency, it is determined that the elevator vibration is abnormal and a fault prompt is given.

[0042] After the output current frequency is filtered, the first real-time vibration frequency is compared with the preset vibration frequency threshold. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored. If the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal and a fault prompt is given.

[0043] The monitoring system for automatically monitoring elevator faults of the present invention is applied in the elevator system to form the elevator control system of the present invention, and the elevator control system is applied to implement the elevator fault monitoring method of the present invention. The abnormal monitoring of elevator vibration is realized, and the interference is reduced by filtering the current frequency and the working frequency of the motor, thereby improving the accuracy of the elevator vibration fault prompt and ensuring the safety of the elevator. Therefore, the elevator control system of the present invention realizes self-diagnosis and self-adjustment.

[0044] In the description of this document, the terms "first" and "second" are only used to distinguish in the description and have no special meaning. In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0045] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0046] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A monitoring system for automatically monitoring elevator failures, characterized in that: It includes an input current monitoring sensor, an input rectifier bridge, a switch tube, an output current monitoring sensor, an encoder, a vibration sensor, and a main control board; the current monitoring sensor, the input rectifier bridge, the switch tube, and the output current monitoring sensor are electrically connected in sequence, and the input current monitoring sensor and the output current monitoring sensor are electrically connected to the main control board; the vibration sensor and the encoder are both connected to the main control board; The monitoring steps of the monitoring system for automatically monitoring elevator failures include: Set the normal preset vibration frequency threshold of the car; The vibration sensor collects the first real-time vibration frequency of the car, and the encoder collects the first real-time motor operating frequency; The first real-time vibration frequency is compared with a preset vibration frequency threshold. If the real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the real-time vibration frequency is not within the preset vibration frequency threshold, the car vibration is abnormal; When the car vibrates abnormally, it is determined whether the first real-time vibration frequency is the same as the first real-time motor operating frequency. If they are different, a current frequency comparison is performed, that is, the first real-time vibration frequency is compared with the output current frequency. If they are the same, the encoder is filtered. After filtering the encoder, the first real-time vibration frequency is compared with the preset vibration frequency threshold again. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, a secondary current frequency comparison is performed; The secondary current frequency, that is, the first real-time vibration frequency is judged again to be compared with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, the output current frequency is filtered without processing the encoder signal data; if the first real-time vibration frequency is different from the output current frequency, it is judged that the elevator vibration is abnormal and a fault prompt is given; After filtering the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the third time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, the first real-time motor operating frequency is filtered and the output current frequency is filtered; After filtering the first real-time motor operating frequency and the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the fourth time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal, and a fault prompt is given.

2. The automatic monitoring system for elevator failure according to claim 1 is characterized in that: The main control board includes an MCU and an ADC, the MCU is electrically connected to the ADC, the MCU is electrically connected to the vibration sensor and the encoder, and the ADC is electrically connected to the input current monitoring sensor and the output current monitoring sensor.

3. An elevator control system, characterized in that: A monitoring system according to any one of claims 1 to 2, characterized in that it further comprises a motor, a counterweight, and a car; the vibration sensor is arranged on the car, and the encoder is arranged on the motor; The monitoring step of the elevator control system comprises: Set the normal preset vibration frequency threshold of the car; The vibration sensor collects the first real-time vibration frequency of the car, and the encoder collects the first real-time motor operating frequency; The first real-time vibration frequency is compared with a preset vibration frequency threshold. If the real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the real-time vibration frequency is not within the preset vibration frequency threshold, the car vibration is abnormal; When the car vibrates abnormally, it is determined whether the first real-time vibration frequency is the same as the first real-time motor operating frequency. If they are different, a current frequency comparison is performed, that is, the first real-time vibration frequency is compared with the output current frequency. If they are the same, the encoder is filtered. After filtering the encoder, the first real-time vibration frequency is compared with the preset vibration frequency threshold again. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, a secondary current frequency comparison is performed; The secondary current frequency, that is, the first real-time vibration frequency is judged again to be compared with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, the output current frequency is filtered without processing the encoder signal data; if the first real-time vibration frequency is different from the output current frequency, it is judged that the elevator vibration is abnormal and a fault prompt is given; After filtering the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the third time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, the first real-time motor operating frequency is filtered and the output current frequency is filtered; After filtering the first real-time motor operating frequency and the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the fourth time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal, and a fault prompt is given.

4. A method for monitoring elevator failure, using the elevator control system according to claim 3, characterized in that: The following steps are involved: Collect the real-time vibration frequency of the elevator and judge whether the real-time vibration frequency is abnormal. If it is normal, the car vibration is normal, and the vibration of the car is continuously monitored. If it is abnormal, filter the output current frequency and / or filter the encoder input signal frequency, and then judge the real-time vibration frequency of the elevator for abnormality. If it is abnormal, give a fault prompt. The elevator fault monitoring method further includes: Set the normal preset vibration frequency threshold of the car; The vibration sensor collects the first real-time vibration frequency of the car, and the encoder collects the first real-time motor operating frequency; The first real-time vibration frequency is compared with a preset vibration frequency threshold. If the real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the real-time vibration frequency is not within the preset vibration frequency threshold, the car vibration is abnormal; When the car vibrates abnormally, it is determined whether the first real-time vibration frequency is the same as the first real-time motor operating frequency. If they are different, a current frequency comparison is performed, that is, the first real-time vibration frequency is compared with the output current frequency. If they are the same, the encoder is filtered. After filtering the encoder, the first real-time vibration frequency is compared with the preset vibration frequency threshold again. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, a secondary current frequency comparison is performed; The secondary current frequency, that is, the first real-time vibration frequency is judged again to be compared with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, the output current frequency is filtered without processing the encoder signal data; if the first real-time vibration frequency is different from the output current frequency, it is judged that the elevator vibration is abnormal and a fault prompt is given; After filtering the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the third time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, the first real-time motor operating frequency is filtered and the output current frequency is filtered; After filtering the first real-time motor operating frequency and the output current frequency, the first real-time vibration frequency is compared with the preset vibration frequency threshold for the fourth time. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored at this time; if the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal, and a fault prompt is given.

5. The elevator failure monitoring method according to claim 4, characterized in that: The primary current frequency comparison includes the following steps: determining the first real-time vibration frequency and comparing it with the output current frequency; if the first real-time vibration frequency is the same as the output current frequency, not processing the encoder signal, and filtering the output current frequency; if the first real-time vibration frequency is different from the output current frequency, determining that the elevator vibration is abnormal, and giving a fault prompt; After the output current frequency is filtered, the first real-time vibration frequency is compared with the preset vibration frequency threshold. If the first real-time vibration frequency is within the preset vibration frequency threshold, the car vibration is normal, and the vibration of the car is continuously monitored. If the first real-time vibration frequency is not within the preset vibration frequency threshold, it is judged that the elevator vibration is abnormal and a fault prompt is given.

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