CN113834559A - Integrated rotary-vibration sensing assembly and digital vibration sensor with rotation speed signal - Google Patents
Integrated rotary-vibration sensing assembly and digital vibration sensor with rotation speed signal Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/003—Measuring characteristics of vibrations in solids by using direct conduction to the detector of rotating machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/003—Measuring characteristics of vibrations in solids by using direct conduction to the detector of rotating machines
- G01H1/006—Measuring characteristics of vibrations in solids by using direct conduction to the detector of rotating machines of the rotor of turbo machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
- G01H1/14—Frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
- G01H1/16—Amplitude
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
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Abstract
The invention discloses an integrated rotary-vibration sensing component, which is used for measuring vibration information of at least one rotating device, wherein the rotating device is provided with at least one rotating shaft, and the integrated rotary-vibration sensing component comprises: at least one rotation detection device for detecting the rotation speed of the rotation shaft and converting the rotation speed into rotation information to be output; a vibration measuring device for outputting a vibration information; and at least one processing device for receiving the rotation information, determining a vibration fundamental frequency band according to the rotation information, filtering the vibration information and outputting measurement information corresponding to the vibration fundamental frequency band. In addition, the invention also discloses a digital vibration sensor with a rotating speed signal.
Description
Technical Field
The present invention relates to an integrated rotary-vibration sensing assembly, and more particularly to an integrated rotary-vibration sensing assembly of a digital vibration sensor having a rotation speed signal.
Background
Any equipment having a rotor or shaft that rotates about an axis may be referred to as rotating equipment, including fans, motors, pumps, and compressors, as are common in factories, up to wind turbine shafts and speed reducers and axles for high speed railway trains that operate at high speeds. The rotor or the rotating shaft of any rotating equipment cannot be in a perfect true circle condition, and the rotor or the rotating shaft of some rotating equipment is even gradually skewed and deformed due to long-time loading, so that the rotor or the rotating shaft of the rotating equipment can generate certain reciprocating acting forces due to eccentric rotation with different degrees during operation, the rotor or the rotating shaft of the rotating equipment is vibrated and the material of the rotor or the rotating shaft is fatigued and aged, when the eccentric rotation is more and more serious along with the aggravation of the deformation, the generated vibration is more and more large, and finally the rotor or the rotating shaft can be broken. Therefore, the condition of the rotating equipment can be judged by monitoring the vibration behavior generated by the action. For railway vehicle applications, vibration of a minimum of 1mG is periodically monitored, and transmission shaft breakage of a railway vehicle occurs, and the conventional aging threshold of component devices such as transmission shafts or gearboxes is limited to about 30 to 50mG of vibration, and the device must be replaced in advance before the device is broken down or damaged, so that derived financial loss or casualties are avoided.
As for the machine tool, the shaft work (craft work) which is mainly provided with stable output by the electric motor is used as a power source, and the power is provided to the corresponding cutter through various conversion components to generate processing functions such as turning, milling, planing, grinding and drilling, because the processing precision requirement of the mechanical workpiece is increased with the increasing precision of the industries of various industries, the high-precision machine tool not only has increasing demand in quantity, but also has more and more strict processing precision capability requirement, and the main determining factors of the processing precision capability traditionally include: the size precision of the components of the machine tool itself, the anti-vibration capability, the stability of the power source, the quality of the tool, etc., wherein the anti-vibration capability is mainly to increase the weight of the machine tool itself to suppress vibration, and a tachometer is provided to monitor the rotation speed variation of the electric motor. Wherein, no matter the motor rotor and the transmission shaft are stressed and gradually deformed after long-term use, the vibration problem caused by the eccentric rotation is increasingly serious, and the traditional weight increasing method cannot inhibit the vibration, so that the problem of poor precision of a product produced by machining of a tool machine is caused; especially, in order to avoid the risk of the breakage of the rotating shaft, a mode of regular replacement and maintenance is adopted to ensure the safety of the machine tool. However, the deformation of the rotating shaft does not exceed a certain threshold, so that the replacement and maintenance are undoubtedly added with unnecessary cost, and the economic benefit of manufacturers is not satisfied.
The method for improving vibration suppression of a rotating device in recent years includes the steps of firstly performing dynamic balance measurement at the beginning of putting a rotor shaft such as a motor rotor or a transmission shaft into use, measuring the magnitude and position of the rotational unbalance of the rotor, performing dynamic balance compensation to reduce vibration generated by eccentric rotation in a mode of adding a proper counter weight at the opposite position of the unbalance position, and then periodically performing dynamic balance measurement and compensation again to reduce the eccentric rotation. Some high-level equipment such as high-speed railway trains are also provided with a vibration meter beside the rotating equipment for real-time monitoring.
However, as shown in fig. 8, the high-level equipment is not used for detecting vibration even though the machine is provided with a tachometer, but only outputs motor speed data for an operator to refer to. On the other hand, the part for detecting the vibration is only to arrange a vibration meter on the machine table, the vibration meter is used for detecting the vibration data of the equipment, and the original measurement value obtained by the vibration measurement is analyzed by the processor.
Furthermore, because the vibrating meter is affected by the position of the vibrating meter, for example, the vibrating meter is located near the pulley set, the amplitude of the vibrating meter is affected by the vibration amplitude of the pulley set, and may be more obvious than the amplitude of the rotating shaft of the main driving motor, and the interference of such noise may deteriorate the signal noise ratio (S/N ratio) to cause distortion of the final operation result, and the amplitude of the rotating shaft of the motor to be measured is ignored instead, so that the real vibration eccentricity condition cannot be accurately known; in addition, in a highly automated factory, a production line can be provided with a plurality of machines, a large number of machines are required to be subjected to real-time vibration monitoring, the uploaded vibration information data amount forms huge burden of information transmission and operation processing, and the purpose of real-time vibration monitoring can be achieved only by arranging an expensive high-speed transmission network and selecting a server or a workstation with strong operation capability.
In particular, in complex equipment such as an electric vehicle, the vibration may be generated from more than one source, and the vibrations having different frequencies may be generated from the motor to the reduction gear set and the transmission shaft, and the vibration of each vibration source may have different magnitudes, different from the distance of the vibration meter.
Therefore, how to provide a set of precise and reliable vibration sensing assemblies with low data transmission quantity and economical price for monitoring the vibration of various rotor shaft members in the rotating equipment in real time so as to find the degradation problem in advance and maintain in advance to avoid the loss caused by the degradation problem; in particular, it is an important subject to be solved by the present invention that a single set of vibration sensors can simultaneously detect multiple vibration sources.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, it is desirable to provide an integrated rotary-vibration inducing assembly according to an embodiment of the present invention, which is intended to achieve the following objectives: (1) the vibration of a specific vibration source in the rotating equipment can be monitored in real time, and the S/N ratio is improved, so that the degradation problem can be found in time; (2) the vibration of a specific vibration source in the rotating equipment can be monitored in real time, the vibration is filtered in the early stage, irrelevant data are screened out from vibration information, and the amount of uploaded data is reduced so as to improve the information transmission speed and accuracy; (3) through early screening and reduction of irrelevant noise, the uploaded data volume is effectively reduced, the efficiency requirements of vibration information transmission equipment and vibration information processing equipment can be reduced, and the cost of subsequent matched hardware equipment is reduced and the efficiency is improved; (4) it is feasible to measure multiple vibration sources by a single vibration sensing component. In addition, the present invention also provides a digital vibration sensor with a rotation speed signal, which can effectively filter the information of the vibration fundamental frequency band and improve the S/N ratio of the vibration measurement by capturing the rotation speed signal of a specific vibration source; by capturing the rotation speed signals of multiple specific vibration sources, on one hand, the synchronous processing of the vibration data of the multiple vibration sources becomes feasible, and simultaneously, the data uploading amount and the post-processing burden are reduced.
According to an embodiment of the present invention, an integrated rotary-vibration sensing assembly for measuring vibration information of at least one rotating device having at least one rotating shaft is provided, the integrated rotary-vibration sensing assembly comprising: at least one rotation detection device for detecting the rotation speed of the rotation shaft and converting the rotation speed into rotation information to be output; a vibration measuring device for outputting a vibration information; and at least one processing device for receiving the rotation information, determining a vibration fundamental frequency band according to the rotation information, filtering the vibration information and outputting measurement information corresponding to the vibration fundamental frequency band.
Furthermore, when the vibration source to be measured has a built-in tachometer, the present invention provides a digital vibration sensor with a tachometer signal, which is used for measuring vibration information of at least one rotating device, wherein the rotating device has at least one rotating shaft, and the rotating device is matched with at least one rotation detecting device for detecting the rotating speed of the rotating shaft, and the rotation detecting device can convert the rotating speed into a rotation information to be output, the digital vibration sensor with the tachometer signal comprises: a vibration measuring device for outputting a vibration information; and at least one processing device for receiving the rotation information, determining a vibration fundamental frequency band according to the rotation information, filtering the vibration information and outputting measurement information corresponding to the vibration fundamental frequency band.
Compared with the prior art, the invention measures the vibration information and the rotation information of at least one piece of rotating equipment by the integrated rotating-vibrating sensing component, and determines a vibration basic frequency band according to the rotation information, thereby filtering the originally measured vibration information, eliminating the noise data outside the vibration basic frequency band to improve the S/N ratio, and enabling the measuring result to be more accurate without being interfered by noise; the irrelevant data can be reduced in the early stage, so that the uploaded data volume is effectively reduced, and the matched data transmission equipment and the matched operation processing equipment can be more economical and achieve more excellent vibration measurement efficiency; in another aspect, a single vibrating meter may be used to sense multiple sources of vibration, among other things; especially, when the vibration source is provided with a corresponding tachometer, the same advantages can be achieved by acquiring the tachometer without additionally arranging the tachometer, so that the overall use flexibility is increased, and all the problems are solved at one stroke.
Drawings
FIG. 1 is a schematic diagram of a high speed railway train application of a first preferred embodiment of an integrated rolling-vibration inducing assembly of the present invention.
FIG. 2 is a diagram illustrating the structure of the integrated rotary-vibration sensing component according to the first preferred embodiment of the present invention.
FIG. 3 is a schematic diagram of the rotational speed waveform of the rotating equipment according to the first preferred embodiment of the integrated rotary-vibration sensing assembly of the present invention.
FIG. 4 is a schematic diagram of the vibration fundamental frequency band of the rotating equipment of the first preferred embodiment of the integrated rotary-vibration sensing assembly of the present invention.
FIG. 5 is a schematic diagram of a machine tool with a second preferred embodiment of a digital vibration sensor with a rotational speed signal according to the present invention.
FIG. 6 is a diagram illustrating a second preferred embodiment of the digital vibration sensor with a rotation speed signal according to the present invention.
FIG. 7 is a diagram illustrating the structure of the integrated rotary-vibration sensing assembly according to the third preferred embodiment of the present invention.
FIG. 8 is a block diagram of a prior art high-order equipment vibration monitoring process.
Wherein: 1 is an integrated rotary-vibration sensing component; 10. 10' is a rotation detection device; 12. 12' is a vibration measuring device; 14. 14', 14 "are processing devices; 15' is an input port; 16. 16' is a communication device; 18. 18' is a remote server; 182 is a processing unit; 184 is a storage unit; 186 is a communication unit; 2' is a digital vibration sensor; 3. 3' is a rotating device; 31. 31' is a rotating shaft; 33 is a digital driving device; 4' is a synchronous coupler; 5' is a lead screw; 51' is a screw thread; 52' is a rotary speed encoder; 6' is a nut slider; p is the vibration fundamental frequency band.
Detailed Description
The invention is further illustrated with reference to the following figures and specific examples. These examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure in any way whatsoever. After reading the description of the invention, one skilled in the art can make various changes and modifications to the invention, and such equivalent changes and modifications also fall into the scope of the invention defined by the claims.
First preferred embodiment
As shown in fig. 1 to 4, in an integrated rolling-vibration sensing assembly according to a first preferred embodiment of the present invention, a high-speed railway train has a digital driving device 33, which is exemplified by a digital motor driver, for outputting square wave digital driving signals to drive electric motors in front and/or rear motor heads of the train as a power source, and at least two wheel sets are provided for each car including the motor heads to carry the weight of passengers and cargo in the car. When the electric motor is driven by a digital driving signal to rotate at a high speed to output shaft power, and the rotational speed and the lifting torque force are adjusted in real time by a speed reducer, the rotational speed and the lifting torque force are transmitted to the wheel set by the transmission shaft to drive the train to run at a proper speed.
Since the electric motor has a rotor that outputs power, the reducer has a plurality of reduction gears, the transmission shaft, and the wheels have rotating shafts, the electric motor, the reducer, the transmission shaft, and each wheel are defined herein as a rotating device 3, and each rotating device has at least one rotating shaft 31, so that the train in this embodiment includes a plurality of rotating devices 3 and a plurality of rotating shafts 31.
In the present embodiment, the integrated rolling-vibration sensing component 1 is, for example, a set of real-time vibration monitoring components installed on a high-speed railway train, and includes: a rotation detecting device 10, a vibration measuring device 12, a processing device 14, an example of which is a microprocessor, a communication device 16, an example of which is a 4G wireless hard disk mini-cloud, and a remote server 18, an example of which is a cloud server of a row control center, are provided corresponding to each rotating shaft 31. The rotation detecting device 10 in the present embodiment is a tachometer of a hall effect sensor that directly detects the rotation speed of each rotating shaft 31; the vibration measuring device 12 is, for example, a vibration sensor of an MEMS triaxial accelerometer, and is configured to detect and output vibration information including a vibration frequency and an amplitude of each rotating apparatus 3; the processing device 14 is electrically connected to each of the rotation detecting devices 10 for receiving the rotation information outputted therefrom, and the vibration measuring devices 12 for receiving the vibration information outputted therefrom, and is electrically connected to the communication device 16.
Since the electric motor in this embodiment is driven by the digital driving signal as shown in fig. 3, even if macroscopically the motor is commanded to follow a sinusoidal driving signal at 2000 rpm, under microscopic examination, the driving signal and the rotation speed of the rotating shaft 31 do not continuously change in a linear curve, but are spliced by saw-toothed square waves, so that the actual driving signal and rotation speed actually drift between, for example, 1995 and 2005; when power is output to the reduction gear set, the rotating speed is reduced again to enable the torque to be increased, and the shaking of the reduction gear set is more complicated; the power is then transmitted to the drive shaft, and the rotational speed and vibration also add further variables.
In this embodiment, the processing device 14 converts the rotation speed into rotation information including an angular speed and an angular frequency, and performs a spectrum analysis on the rotation information to obtain a composite frequency curve of a full frequency domain, and if the known frequency of the motor is 2000 rpm, for example, the composite frequency curve is used as a vibration fundamental frequency band P of the motor according to at least one continuous frequency range of the frequency curve, for example, 1990 to 2010 rpm; correspondingly, the reduction gear set and the transmission shaft respectively have respective vibration basic frequency bands, and due to the difference of the frequency ranges of the three, even if a certain vibration source is closest to the vibration measuring device or is most obvious in measured data because of the maximum amplitude, the three are respectively filtered by different frequency bands, and the respective filtering operation is carried out on all vibration information, so that partial components of the vibration basic frequency bands corresponding to the rotating devices 3 can be selected from the complete vibration information, and the corresponding measuring information of the rotating devices 3 is generated and output. Because a remote server is not needed, the operation processing of the adjacent equipment end is defined as a preprocessing, and the data volume transmitted after uploading can be greatly reduced through the filtering.
The communication device 16 is electrically connected to the processing device 14 to receive the measurement information, and then uploaded to the remote server 18 in the control center through, for example, a 4G wireless network, because each measurement information has been passed through filtering operation to remove noise such as frequency doubling, etc., even though the vibration sources such as the motor, the reduction gear set, the transmission shaft, etc. have different vibration frequencies and amplitudes, by means of windowing and sampling respectively for the three different basic frequency bands, it is completely possible to clearly distinguish the respective vibration frequencies and amplitudes, there is no risk that the vibration source with smaller amplitude is completely ignored, and there is no problem that the vibration source far away from the measurement device is ignored because the distances between each vibration source and the vibration measurement device are far and near, so that not only one set of vibration measurement device is installed separately at, for example, the head of the power machine, to obtain the separated vibration data of each vibration source, the data which is processed in the early stage to greatly reduce the data volume of the measurement information can be transmitted at high speed only by the low-level processor and the low-level network communication device.
The remote server 18 is built with a processing unit 182, a storage unit 184 and a communication unit 186, which is illustrated as an RJ45 network transmission port, in this embodiment, each of the rotating devices 3 is stored with a predetermined safe value range, when the measurement information of each of the rotating devices 3 is received in real time, the measurement information is compared with the safe value range, and when the measurement information exceeds the safe value range, the processing unit sends out an "abnormal" operation result and starts an alarm to notify a technician to process the abnormal rotating device 3.
In this embodiment, the rotation speed information of each rotating device is used as a vibration basic frequency band of the rotating device, and then the vibration information of each rotating device is filtered according to the vibration basic frequency band in advance, so that the frequency drift of the vibration source within a reasonable range can be smoothly calculated, but other frequencies exceeding the reasonable range are considered as noise to be filtered, thereby greatly reducing the data amount of the filtered measurement information, and a user only needs to use a low-order processor and network transmission equipment, and the measurement information after the noise is removed is more accurate and reliable.
Second preferred embodiment
As will be readily understood by those skilled in the art, since many processing machines are directly provided with a rotational speed control device for adjustment and control by an operator, and a general mechanical factory is not willing to destroy the integrity of the original machine, and the structure of the present invention is additionally provided, the second preferred embodiment of the present invention is described below, the vibration sensor in this embodiment does not include a rotational speed detection device, the same parts in this embodiment as the previous preferred embodiment are not described herein again, and similar components are also provided with similar names and reference numerals, and only the differences are described.
As shown in fig. 5 to 6, the digital vibration sensor 2 ' with a rotation speed signal is a real-time vibration monitoring component installed on a Computer Numerical Control (CNC) machine tool, and the CNC machine tool in this embodiment is a loop of a set of unmanned factory in-line production, which has a rotating device 3 ' as a power source, which is an electric motor controlled by a square wave digital driving signal, and a lead screw 5 ' connected with the rotating device 3 through a synchronous coupler 4 ', and the motor outputs power to the lead screw 5 ' through the synchronous coupler 4 ', and the lead screw 5 ' is driven by a rotating shaft 31 ' through the synchronous coupler 4 ' to rotate at the same rotation speed, and the working platform is driven to move forward and backward along the long axis direction of the lead screw 5 ' by the angle matching of the thread 51 ' on the lead screw 5 ' and the nut slider 6 ', and an optical type rotation speed encoder 52 'is arranged at the tail end of the guide screw 5' in a matching way to accurately detect the rotation speed of the guide screw 5 ', and simultaneously the rotation speed is converted into rotation information containing angular speed and angular frequency, and then the rotation information is fed back and output to a remote server 18' in a central control room of a factory to control the whole production line.
Since the lead screw 5 'in this embodiment is connected to the rotating shaft 31' via the synchronous coupling 4 'and does not pass through any speed changing device, the rotating speed of the lead screw 5' captured by the rotating speed encoder 52 'is equal to the rotating speed of the rotating shaft 31', and therefore, the digital vibration sensor 2 'with the rotating speed signal in this embodiment can determine the frequency range of the vibration fundamental frequency band of the rotating device 3' only by receiving the rotating speed of the rotating shaft 31 'captured by the rotating speed encoder 52', without providing any rotation detecting device.
The digital vibration sensor 2 'with rotation speed signal is installed on the rotating device 3' and includes: a vibration measuring device 12 'illustrated as an eddy current type displacement vibration sensor, a processing device 14', and a communication device 16 'illustrated as a 4G wireless network card, in the present embodiment, since the remote server has already held the rotation speed data of the CNC machine tool, the digital vibration sensor 2' additionally receives the rotation information outputted from the rotation speed encoder 52 'through an input port 15' illustrated as RS485, so that the processing device 14 'establishes a vibration fundamental frequency band representing the rotating equipment 3', and performs a filtering operation on the vibration information according to the frequency range of the vibration fundamental frequency band to select a portion of the vibration information of the rotating equipment 3 'corresponding to the vibration fundamental frequency band, thereby generating a corresponding measurement information of the rotating equipment 3', and then uploading the measurement information to the remote server 18 'illustrated as a machine tool maintainer through the communication device 16', and when the rotating equipment 3 'actually slightly exceeds the safety range, an alarm is started to inform technicians to maintain the abnormal rotating equipment 3' in the future, so that the unmanned factory does not need to estimate according to the original safety any more, and under the condition that the rotating equipment actually still normally operates, the factory is stopped for processing only when the preset operating time is reached, thereby improving the operating efficiency of the factory.
The digital vibration sensor 2' with the rotation speed signal in the embodiment makes full use of the rotation speed monitoring device of the machine tool, and calculates the vibration fundamental frequency band of the rotating equipment by receiving the rotation speed information output by the rotation speed monitoring device, so that the cost of additionally arranging the rotation detection device can be reduced, the original integrity of the machine table is not damaged, only a group of external digital vibration sensors are added, the core device of the machine table can be accurately reported when the core device of the machine table needs to be maintained, and the digital vibration sensor can completely meet the requirements of the industry no matter the compatibility or the use elasticity of the existing machine table equipment.
Third preferred embodiment
Furthermore, as shown in fig. 7, in a third preferred embodiment of the present invention, when the vibration monitoring system of the large-scale unmanned automation plant is described by the vibration monitoring situation of three automation equipment machines, each rotation detection device 10 ″ in the present embodiment is for example interpreted as a digital signal acquisition card of a USB interface and the input port is a USB3.1 slot, and the rotation detection device 10 ″ is for acquiring the square wave driving signal of the corresponding rotation device and converting the square wave driving signal into rotation information including an angular velocity and an angular frequency through an RS-485 interface and the digital control computer of the corresponding machine, and then providing the rotation information to the processing device 14 ".
The digital vibration sensor in the embodiment can use a cheap digital signal acquisition card to directly acquire the driving signal of the rotating equipment for processing and utilization to generate measurement information, and no matter on a machine table or an integrated rotating-vibrating sensing assembly, a large amount of expensive rotation detection devices are not required to be arranged, so that the advantages of saving the hardware cost of the rotation detection devices and network transmission equipment and the like can be further highlighted when the digital vibration sensor is applied to a large-scale unmanned automatic factory.
In summary, the integrated rotary-vibration sensing assembly of the present invention provides the rotation speed of the rotating device by the rotation detecting device, so as to define a proper vibration fundamental frequency band, so that the complex original vibration information is greatly reduced to the measurement information conforming to the fundamental frequency band, the S/N ratio is definitely improved, and the vibration detection is more accurate; even if the measurement is carried out by a plurality of vibration sources, the vibration conditions can be smoothly distinguished, and partial information can not be ignored due to the influence of the distance of the vibration sources or the amplitude; particularly, irrelevant data in the transmission information is screened by the early-stage digital processing and filtering, the data volume transmitted after uploading is reduced, the information transmission speed and accuracy can be improved, the hardware and software requirements for transmission and post-processing are reduced, the data processed by post-control is simplified, the cost of subsequent matched hardware equipment is reduced, and the efficiency is improved.
Claims (10)
1. An integrated rotary-vibration sensing assembly for measuring vibration information of at least one rotating device having at least one rotating shaft, the integrated rotary-vibration sensing assembly comprising:
at least one rotation detection device for detecting the rotation speed of the rotation shaft and converting the rotation speed into rotation information to be output;
a vibration measuring device for outputting a vibration information; and
at least one processing device for receiving the rotation information and determining a vibration fundamental frequency band according to the rotation information, thereby filtering the vibration information and outputting a measurement information corresponding to the vibration fundamental frequency band.
2. The integrated rotary-vibration sensing assembly according to claim 1, further comprising a communication device for wirelessly transmitting said measurement information.
3. The integrated rotary-vibration sensor assembly according to claim 2, further comprising a remote server for receiving the measurement information and comparing the measurement information with a predetermined safety value range to determine whether to output an alarm signal.
4. The integrated rotary-vibration sensing assembly according to claim 1, wherein said rotation detecting means is a tachometer for directly measuring the rotational speed of said rotating shaft.
5. The integrated rotary-vibration sensing assembly according to claim 1, wherein the rotary device is rotated by a driving signal of a digital driving device, and the rotation information is captured by the rotation detecting device and converted and outputted correspondingly.
6. The integrated rotary-vibration sensing assembly according to claim 1, wherein said processing means is configured to perform a spectral analysis on said rotational information to obtain at least one frequency curve, and to select a portion of said vibration information within said continuous frequency range to generate a measurement information according to at least one continuous frequency range of said frequency curve.
7. A digital vibration sensor with rotation speed signal is used to measure the vibration information of at least one rotating device, wherein the rotating device has at least one rotating shaft, and the rotating device is matched with at least one rotation detection device for detecting the rotation speed of the rotating shaft, and the rotation detection device can convert the rotation speed into a rotation information output, which is characterized in that the digital vibration sensor with rotation speed signal comprises:
a vibration measuring device for outputting a vibration information; and
at least one processing device for receiving the rotation information and determining a vibration fundamental frequency band according to the rotation information, thereby filtering the vibration information and outputting a measurement information corresponding to the vibration fundamental frequency band.
8. The digital vibration sensor with rotation speed signal as claimed in claim 7, further comprising an input port for receiving said rotation information.
9. The digital vibration sensor with tachometer signal of claim 7 further comprising a communication device for wirelessly transmitting the measurement information.
10. The digital vibration sensor with rotation speed signal as claimed in claim 9, wherein the rotation information outputted from the rotation detecting device is transmitted to a remote server, and the communication device further comprises a receiving unit for receiving the rotation information transmitted from the remote server.
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