CN113654649A - Motor vibration monitoring device - Google Patents
Motor vibration monitoring device Download PDFInfo
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- CN113654649A CN113654649A CN202110949706.2A CN202110949706A CN113654649A CN 113654649 A CN113654649 A CN 113654649A CN 202110949706 A CN202110949706 A CN 202110949706A CN 113654649 A CN113654649 A CN 113654649A
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- 238000012806 monitoring device Methods 0.000 title claims description 17
- 238000001914 filtration Methods 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims abstract description 28
- 238000005070 sampling Methods 0.000 claims description 20
- 230000001133 acceleration Effects 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
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- 239000003990 capacitor Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Abstract
The invention discloses a motor vibration detection device which comprises a vibration sensor, an active filtering module and a processing module, wherein the active filtering module is used for filtering vibration signals output by the vibration sensor so as to filter out clutter in the vibration signals, the active filtering module can be used for carrying out dynamic tracking compensation on the vibration signals, the phase delay of the vibration signals received by the processing module can be reduced, and the accuracy and the reliability of monitoring the motor are further improved.
Description
Technical Field
The invention relates to the field of motor monitoring, in particular to a motor vibration monitoring device.
Background
The vibration condition of motor is closely related with the operating mode of motor, consequently, can generally use vibration sensor to detect the vibration state of motor to send the vibration signal who detects to processing module, in order to realize the real-time supervision to the motor vibration state. Noise is generally included in the vibration signal, which causes inaccurate monitoring of the vibration state of the motor.
Disclosure of Invention
The invention aims to provide a motor vibration monitoring device, an active filtering module can perform dynamic tracking compensation on a vibration signal, and the phase delay of the vibration signal received by a processing module can be reduced, so that the accuracy and the reliability of monitoring the motor are improved.
In order to solve the above technical problem, the present invention provides a motor vibration monitoring device, including:
the vibration sensor is used for acquiring the vibration state of the motor to obtain a vibration signal;
the active filtering module is connected with the vibration sensor and is used for filtering clutter in the vibration signal;
and the processing module is connected with the active filtering module and is used for monitoring the vibration state of the motor in real time based on the vibration signal output by the active filtering module.
Preferably, the vibration sensor is an ICP vibration sensor, and is configured to acquire acceleration signals of the motor in XYZ three directions;
the active filtering module is specifically used for filtering out clutter in the acceleration signal;
the processing module is specifically used for monitoring the vibration state of the motor in real time based on the acceleration signal output by the active filtering module.
Preferably, the active filtering module includes:
and the high-order active high-pass filter is connected with the vibration sensor and is used for filtering signals which are lower than a first cut-off frequency in the vibration signals.
Preferably, the active filtering module further includes:
and the high-order active low-pass filter is connected with the active high-pass filter and used for filtering out signals higher than a second cut-off frequency in the vibration signals, and the first cut-off frequency is smaller than the second cut-off frequency.
Preferably, the active filtering module is further configured to filter out a dc offset component in the vibration signal;
further comprising:
and the direct current bias output module is arranged between the high-order active high-pass filter and the high-order active low-pass filter and used for outputting a fixed direct current bias component so as to be superposed with the vibration signal output by the high-order active high-pass filter, so that all values of the vibration signal are positive.
Preferably, the method further comprises the following steps:
and the passive pi-type filtering module is arranged between the vibration sensor and the high-order active high-pass filter and is used for filtering voltage spikes and burrs in the vibration signal output by the vibration sensor.
Preferably, the processing module comprises:
the sampling module is connected with the active filtering module and is used for sampling the vibration signal after filtering and removing impurities to obtain a sampling signal;
and the digital signal processing DSP processor is connected with the sampling module and is used for monitoring the vibration state of the motor in real time based on the sampling signal.
Preferably, the method further comprises the following steps:
and the wireless module is connected with the DSP processor and is used for sending the real-time monitoring result of the DSP processor to an upper layer server.
The application provides a motor vibration detection device, including vibration sensor, active filter module and processing module, use the active filter module to carry out the filtering with the clutter in the filtering vibration signal to the vibration signal of vibration sensor output in this application, wherein, the active filter module can carry out dynamic tracking compensation to vibration signal, can reduce the phase delay of the vibration signal that processing module received, and then improves accuracy and the reliability of monitoring the motor.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of a motor vibration monitoring device according to the present invention;
fig. 2 is a block diagram of another motor vibration monitoring device provided by the present invention.
Detailed Description
The core of the invention is to provide a motor vibration monitoring device, an active filtering module can perform dynamic tracking compensation on a vibration signal, and can reduce the phase delay of the vibration signal received by a processing module, thereby improving the accuracy and reliability of monitoring the motor.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a block diagram of a motor vibration monitoring device provided in the present invention, the device includes:
the vibration sensor 11 is used for acquiring the vibration state of the motor to obtain a vibration signal;
the active filtering module 12 is connected with the vibration sensor 11 and is used for filtering out clutter in the vibration signal;
and the processing module 13 is connected to the active filtering module 12 and is configured to monitor a vibration state of the motor in real time based on the vibration signal output by the active filtering module 12.
Considering that noise may exist in the vibration signal output by the vibration sensor 11, which results in inaccuracy of the vibration signal acquired by the processing module 13, when the processing module 13 monitors the vibration state of the motor according to the vibration signal directly output by the vibration sensor 11, the monitoring of the vibration state of the motor is inaccurate.
In order to solve the technical problem, the design idea of the application is as follows: set up a filter equipment at vibration sensor 11's output to the clutter that contains in the vibration signal of filtering vibration sensor 11 output, but the performance of considering passive filter equipment is relatively poor, when using passive filter equipment to filter the vibration signal, the throughput to the low frequency signal in the vibration signal is relatively poor, and when using passive filter equipment to filter and transmit the vibration signal, processing speed is relatively slow, there is phase delay in the vibration signal that processing module 13 received, also probably cause the inaccurate of the monitoring to the vibration state of motor.
Based on this, the active filtering module 12 is used in the present application to filter the vibration signal output by the vibration sensor 11, so as to filter out clutter in the vibration signal, and ensure the accuracy of the vibration signal received by the processing module 13. In addition, the active filtering module 12 can perform dynamic tracking compensation on the vibration signal, and can reduce the phase delay of the vibration signal received by the processing module 13, thereby improving the accuracy and reliability of monitoring the motor.
As a preferred embodiment, the vibration sensor 11 is an ICP vibration sensor 11, and is configured to collect acceleration signals of the motor in XYZ three directions;
the active filtering module 12 is specifically configured to filter out clutter in the acceleration signal;
the processing module 13 is specifically configured to monitor the vibration state of the motor in real time based on the acceleration signal output by the active filtering module 12.
It should be noted that, the vibration sensor 11 in the present application may be, but is not limited to, an ICP vibration sensor 11, where the ICP vibration sensor is a three-axis acceleration sensor, the ICP vibration sensor is mounted on a surface of a motor through a bolt, acceleration signals in three directions of the motor X, Y, Z are collected, specifically, at this time, the active filtering module 12 filters the acceleration signals in the three directions, and the processing module 13 monitors a vibration state of the motor based on the acceleration signals in the three directions. In addition, the constant current source has very good constant current precision, anti-jamming capability and remote transmission capability, so the constant current source can be selected to supply power for the ICP sensor.
In conclusion, the motor vibration monitoring device in the application can realize more accurate detection and strong anti-interference capability on the motor, thereby realizing accurate monitoring on the vibration state of the motor.
On the basis of the above-described embodiment:
referring to fig. 2, fig. 2 is a block diagram of another motor vibration monitoring device provided in the present invention.
As a preferred embodiment, the active filtering module 12 includes:
and a high-order active high-pass filter 22 connected to the vibration sensor 11 for filtering out signals lower than the first cut-off frequency from the vibration signal.
The present embodiment is directed to provide a specific implementation manner of the active filtering module 12, and in particular, when the active filtering module 12 includes the high-order active high-pass filter 22, it can ensure that the filter can achieve a very low cut-off frequency, a very narrow transition bandwidth, a pass-band range, and a small signal delay, where the signal gain is smooth and monotonous.
As a preferred embodiment, the active filtering module 12 further includes:
and the high-order active low-pass filter 24 is connected with the active high-pass filter and is used for filtering signals higher than a second cut-off frequency in the vibration signals, and the first cut-off frequency is smaller than the second cut-off frequency.
The present embodiment aims to provide another specific implementation manner of the active filtering module 12, and specifically, when the active filtering module 12 further includes the high-order active low-pass filter 24, the high-frequency interference component in the vibration signal can be filtered, the noise in the whole circuit can be greatly suppressed, and the signal-to-noise ratio of the signal can be improved.
By using the high-order active high-pass filter 22 and the high-order active low-pass filter 24 in combination, the processing module 13 can receive a frequency signal with a preset bandwidth by setting the cutoff frequency, and if the bandwidth of the vibration signal received by the processing module 13 needs to be changed, the cutoff frequency can be flexibly set by controlling the cutoff frequency corresponding to each filter, or according to the type of the motor to be monitored, and the specific cutoff frequency is not particularly limited in this application and is determined according to the actual situation.
It can be seen that by using the high-order active high pass filter 22 and the high-order active low pass filter 24 together, noise outside the preset bandwidth frequency in the vibration signal can be filtered out, and the signal-to-noise ratio of the vibration signal can be improved.
As a preferred embodiment, the active filtering module 12 is further configured to filter out a dc offset component in the vibration signal;
further comprising:
and the direct current offset output module 23 is arranged between the high-order active high-pass filter 22 and the high-order active low-pass filter 24, and is used for outputting a fixed direct current offset component to be superposed with the vibration signal output by the high-order active high-pass filter 22 so as to enable all values of the vibration signal to be positive.
The vibration signal that prior art vibration monitoring device exported vibration sensor 11 generally can be provided with the direct current offset component to negative voltage signal can not appear in making the vibration signal, at this moment, the vibration monitoring device that corresponds can use single power supply, need not adopt dual supply power supply again. However, after the vibration sensor 11 in the prior art is used for a long time, the dc offset component set therein may be unstable, thereby causing an error in the vibration signal and causing an inaccuracy in monitoring the vibration state of the motor.
In order to solve the above technical problem, in the present application, a high-order active high pass filter 22 is used to filter a dc offset component in a vibration signal, only an effective ac component reflecting a vibration condition in the signal is allowed to pass through, and then a module capable of outputting a stable dc offset component is used to output a stable dc offset component, so that the stable dc offset component is superimposed on a vibration signal not including the dc offset component, thereby ensuring that a negative voltage signal does not occur in the ac component, and ensuring the stability of the vibration signal while a single power supply is used.
It should be noted that, when the vibration sensor 11 in the present application is an ICP sensor, the signal output end of the ICP sensor and the required cross current are excited by the same line, and the output vibration signal also includes a dc offset component.
As a preferred embodiment, the method further comprises the following steps:
and the passive pi-type filtering module 21 is arranged between the vibration sensor 11 and the high-order active high-pass filter 22 and is used for filtering voltage spikes and burrs in the vibration signal output by the vibration sensor 11.
When the active filtering module 12 is used to filter the vibration signal, although the filtering performance is good, the stability of the active filtering module 12 is poor, which may result in incomplete filtering of the vibration signal.
In order to solve the above technical problem, in the present application, a passive pi-type filter network is arranged at the front end of the active filter module 12, where the passive pi-type filter network may be composed of a passive device resistor, an inductor, and a capacitor, and is used to filter voltage spikes and burrs in the vibration signal and suppress common mode interference components in the vibration signal.
As a preferred embodiment, the processing module 13 includes:
the sampling module 26 is connected to the active filtering module 12 and is configured to sample the filtered vibration signal to obtain a sampled signal;
and a DSP (Digital Signal processor) connected to the sampling module 26, for monitoring the vibration state of the motor in real time based on the sampling Signal.
The present embodiment aims to provide a specific implementation manner of the processing module 13, specifically, the processing module 13 in the present application includes a sampling module 26 and a DSP processor 25, and the sampling module samples a vibration signal to obtain a digital vibration signal, and then sends the digital vibration signal to the DSP processor 25, and the DSP processor 25 performs an operation on the digital vibration signal to implement real-time monitoring on the vibration state of the motor.
The specific implementation manner of the sampling module 26 may be, but is not limited to, a high-speed AD (analog-digital) sampling chip, where the high-speed AD sampling chip has a differential input analog port, good anti-interference capability, and high-speed analog-to-digital conversion capability. The parallel port bus communication mode adopted by the AD sampling chip can realize very high data throughput capacity, thereby providing technical guarantee for the real-time signal acquisition of motor vibration real-time monitoring.
In addition, the DSP processor 25 is a high-performance digital signal processing chip, can efficiently and quickly run very complex logic programs and algorithms, and has rich communication interfaces to implement multiple ways of data transmission.
In summary, the sampling module 26 and the DSP processor 25 in the present application can implement the function of the processing module 13, and the implementation manner is simple and reliable.
As a preferred embodiment, the method further comprises the following steps:
and the wireless module is connected with the DSP processor 25 and is used for sending the real-time monitoring result of the DSP processor 25 to an upper server.
When the monitoring result of the processing module 13 needs to be sent to the upper server, a wireless module may be further provided in the present application, and is configured to send the monitoring result of the processing module 13 to the upper server.
The wireless module in the present application may also receive data or an instruction from an upper server, and transmit the data or the instruction to the processing module 13, so that the processing module controls the motor vibration detection device based on the data or the instruction.
In addition, in the present application, the transmission method between the upper layer server and the processing module 13 may be, but not limited to, a WIFI (Wireless Fidelity, Wireless communication technology) module, and may also be other Wireless modules as long as data transmission can be achieved, and the present application is not limited in particular herein.
Therefore, the wireless module in the application can realize data transmission between the upper layer server and the processing module 13, and compared with wired transmission, the wireless transmission is more convenient to use and does not need to be limited to factors such as wire length.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A motor vibration monitoring device, comprising:
the vibration sensor is used for acquiring the vibration state of the motor to obtain a vibration signal;
the active filtering module is connected with the vibration sensor and is used for filtering clutter in the vibration signal;
and the processing module is connected with the active filtering module and is used for monitoring the vibration state of the motor in real time based on the vibration signal output by the active filtering module.
2. The motor vibration monitoring device according to claim 1, wherein the vibration sensor is an ICP vibration sensor for acquiring acceleration signals of the motor in XYZ three directions;
the active filtering module is specifically used for filtering out clutter in the acceleration signal;
the processing module is specifically used for monitoring the vibration state of the motor in real time based on the acceleration signal output by the active filtering module.
3. The motor vibration monitoring device of claim 1 wherein said active filtering module comprises:
and the high-order active high-pass filter is connected with the vibration sensor and is used for filtering signals which are lower than a first cut-off frequency in the vibration signals.
4. The motor vibration monitoring device of claim 3 wherein said active filtering module further comprises:
and the high-order active low-pass filter is connected with the active high-pass filter and used for filtering out signals higher than a second cut-off frequency in the vibration signals, and the first cut-off frequency is smaller than the second cut-off frequency.
5. The apparatus according to claim 4, wherein the active filter module is further configured to filter out a dc offset component in the vibration signal;
further comprising:
and the direct current bias output module is arranged between the high-order active high-pass filter and the high-order active low-pass filter and used for outputting a fixed direct current bias component so as to be superposed with the vibration signal output by the high-order active high-pass filter, so that all values of the vibration signal are positive.
6. The motor vibration monitoring apparatus of any one of claims 1 to 5, further comprising:
and the passive pi-type filtering module is arranged between the vibration sensor and the high-order active high-pass filter and is used for filtering voltage spikes and burrs in the vibration signal output by the vibration sensor.
7. The motor vibration monitoring apparatus of claim 6, wherein the processing module comprises:
the sampling module is connected with the active filtering module and is used for sampling the vibration signal after filtering and removing impurities to obtain a sampling signal;
and the digital signal processing DSP processor is connected with the sampling module and is used for monitoring the vibration state of the motor in real time based on the sampling signal.
8. The motor vibration monitoring apparatus of claim 7, further comprising:
and the wireless module is connected with the DSP processor and is used for sending the real-time monitoring result of the DSP processor to an upper layer server.
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| CN202110949706.2A CN113654649A (en) | 2021-08-18 | 2021-08-18 | Motor vibration monitoring device |
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| CN202110949706.2A CN113654649A (en) | 2021-08-18 | 2021-08-18 | Motor vibration monitoring device |
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