CN116449198A - Motor fault early warning system based on multiple sensors - Google Patents
Motor fault early warning system based on multiple sensors Download PDFInfo
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- CN116449198A CN116449198A CN202310345677.8A CN202310345677A CN116449198A CN 116449198 A CN116449198 A CN 116449198A CN 202310345677 A CN202310345677 A CN 202310345677A CN 116449198 A CN116449198 A CN 116449198A
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- motor
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- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a motor fault early warning system based on multiple sensors, which comprises: the current sensor, the voltage sensor and the vibration signal sensor are respectively used for monitoring the current, the voltage and the vibration signal of the motor; and a signal processing device connected with the current sensor, the voltage sensor and the vibration signal sensor respectively and configured to: when the absolute value of any one of the current, the voltage, and the vibration signal exceeds the corresponding rated value, an integrated value of the corresponding signal exceeding the corresponding rated value is calculated, and an alarm message is issued when the integrated value is greater than a threshold value. When the voltage current and the vibration signal exceed the deviation exceeding allowable values, a timing means is added, and the loss caused by faults due to long-term sub-health running of the motor is avoided through recording the magnitude of the deviation error allowable values of all parameters.
Description
Technical Field
The invention relates to the field of motor control, in particular to a motor fault early warning system based on multiple sensors.
Background
Motors are the main actuators of modern industrial equipment and are widely used in various industrial fields. However, the monitoring method of the motor is lacking in the prior art. Existing motor monitoring methods generally require complex sensors and signal processing systems, which makes these monitoring means suitable for medium-high-end mechanical equipment only and difficult to popularize.
In addition, the motor monitoring scheme in the prior art does not consider the time accumulation effect of current, voltage and vibration signals after the parameters exceed the threshold value, so that only faults can be detected, but the prevention effect is poor, the long-term sub-health state can not be well pre-warned,
disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention aims to solve the technical problem that the cost of the existing motor monitoring scheme is too high.
In order to achieve the above object, the present invention provides a motor fault early warning system based on multiple sensors, comprising:
the current sensor, the voltage sensor and the vibration signal sensor are respectively used for monitoring the current, the voltage and the vibration signal of the motor;
and a signal processing device connected with the current sensor, the voltage sensor and the vibration signal sensor respectively and configured to: when the absolute value of any one of the current, the voltage, and the vibration signal exceeds the corresponding rated value, an integrated value of the corresponding signal exceeding the corresponding rated value is calculated, and an alarm message is issued when the integrated value is greater than a threshold value.
The invention further improves that the signal processing device comprises a computer and three timers, wherein the timers are in one-to-one correspondence with the current sensor, the voltage sensor and the vibration signal sensor; when the computer detects that the absolute value of any one of the current, voltage and vibration signals exceeds the corresponding rated value, the computer starts a corresponding timer.
A further improvement of the invention is that the timer is a built-in timer of the processor or a timer in communication with the processor.
The invention further improves that the signal processing device is connected with the controller of the motor, and sends out an emergency stop signal to the controller of the motor when the integral value is larger than the threshold value, so that the motor stops rotating.
A further development of the invention consists in that the current sensor, the voltage sensor and the vibration signal sensor are connected in communication with the signal processing device via an RS235 bus or a CAN bus.
The device provided by the invention has the following technical effects: when the deviation exceeds the allowable value, the timing means is added, the fault risk is judged by recording the deviation error allowable value of each parameter and taking the overrun integral value as the fault index, the alarm caused by the disturbance when the burst is short is avoided, and meanwhile, when the deviation of individual or a plurality of parameters is too large for a long time, the fault index is increased and exceeds the allowable threshold value of the fault index, so that the early alarm is achieved, and the loss caused by the fault due to the long-term sub-health operation of the motor is avoided.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
Fig. 1 is a schematic diagram of a multi-sensor based motor fault warning system of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
Some exemplary embodiments of the invention have been described for illustrative purposes, it being understood that the invention may be practiced otherwise than as specifically shown in the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a motor fault early warning system based on multiple sensors, which includes:
the current sensor, the voltage sensor and the vibration signal sensor are respectively used for monitoring the current, the voltage and the vibration signal of the motor;
and a signal processing device connected with the current sensor, the voltage sensor and the vibration signal sensor respectively and configured to: when the absolute value of any one of the current, the voltage, and the vibration signal exceeds the corresponding rated value, an integrated value of the corresponding signal exceeding the corresponding rated value is calculated, and an alarm message is issued when the integrated value is greater than a threshold value.
In this embodiment, the current value, the voltage value, and the vibration signal are monitored separately. After the absolute value of the corresponding value and the corresponding nominal value, statistics of the corresponding integral value is started. The calculation expression of the three integrated values is:
wherein, integrate i 、Integral vol Integral vib Integrated value t of current, voltage and vibration signal respectively 1 For the abnormal start time of the corresponding signal, t 2 Is the current moment; abs (·) is the absolute value operation; i, u, f are measured values of the voltage, current, and vibration signals, respectively. I. U, F are nominal values of the voltage, current, and vibration signals, respectively; i 1 、U 1 、F 1 The error tolerance values for the voltage, current and vibration signals, respectively, are typically small. And after any one or all of the three integrated values exceed a threshold value, the motor can be judged to be in fault.
In this embodiment, the signal processing device includes a computer and three timers, where the timers are in one-to-one correspondence with the current sensor, the voltage sensor and the vibration signal sensor; when the computer detects that the absolute value of any one of the current, voltage and vibration signals exceeds the corresponding rated value, the computer starts a corresponding timer. The timer adopts a timer built in the processor or adopts a timer in communication connection with the processor.
The timer also has the function of automatically initiating interruption when overtime; in this embodiment, after the timer expires for a predetermined period of time, the computer of the signal processing apparatus detects an integrated value of the corresponding parameter, and clears the integrated value if the corresponding integrated value does not reach the threshold value and the integrated value does not continue to increase. In this embodiment, the maximum time duration of the timer is 30s to 1200s.
The signal processing device is connected with the controller of the motor, and sends an emergency stop signal to the controller of the motor when the integral value is larger than the threshold value, so that the motor stops rotating. In some embodiments, the signal processing device may be further connected to a buzzer to give a fault alert sound.
In some embodiments, the current sensor, the voltage sensor, and the vibration signal sensor are communicatively coupled to the signal processing device via an RS235 bus or a CAN bus.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (5)
1. A multi-sensor based motor fault early warning system, comprising:
the current sensor, the voltage sensor and the vibration signal sensor are respectively used for monitoring the current, the voltage and the vibration signal of the motor;
and a signal processing device connected with the current sensor, the voltage sensor and the vibration signal sensor respectively and configured to: when the absolute value of any one of the current, the voltage, and the vibration signal exceeds the corresponding rated value, an integrated value of the corresponding signal exceeding the corresponding rated value is calculated, and an alarm message is issued when the integrated value is greater than a threshold value.
2. The motor fault early warning system based on multiple sensors according to claim 1, wherein the signal processing device comprises a computer and three timers, wherein the timers are in one-to-one correspondence with the current sensor, the voltage sensor and the vibration signal sensor; when the computer detects that the absolute value of any one of the current, voltage and vibration signals exceeds the corresponding rated value, the computer starts a corresponding timer.
3. The multi-sensor based motor fault warning system of claim 2, wherein the timer is a built-in timer of the processor or a timer communicatively coupled to the processor.
4. The multi-sensor based motor fault pre-warning system of claim 1, wherein the signal processing device is connected to a controller of the motor, and when the integrated value is greater than a threshold value, a sudden stop signal is sent to the controller of the motor, so that the motor stops rotating.
5. The multi-sensor based motor fault warning system of claim 1, wherein the current sensor, the voltage sensor and the vibration signal sensor are communicatively connected to the signal processing device via an RS235 bus or a CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310345677.8A CN116449198A (en) | 2023-03-31 | 2023-03-31 | Motor fault early warning system based on multiple sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310345677.8A CN116449198A (en) | 2023-03-31 | 2023-03-31 | Motor fault early warning system based on multiple sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116449198A true CN116449198A (en) | 2023-07-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310345677.8A Pending CN116449198A (en) | 2023-03-31 | 2023-03-31 | Motor fault early warning system based on multiple sensors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116449198A (en) |
-
2023
- 2023-03-31 CN CN202310345677.8A patent/CN116449198A/en active Pending
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