CN202092830U - Dynamic balance analysis device - Google Patents
Dynamic balance analysis device Download PDFInfo
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- CN202092830U CN202092830U CN2011201574768U CN201120157476U CN202092830U CN 202092830 U CN202092830 U CN 202092830U CN 2011201574768 U CN2011201574768 U CN 2011201574768U CN 201120157476 U CN201120157476 U CN 201120157476U CN 202092830 U CN202092830 U CN 202092830U
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Abstract
The utility model discloses a dynamic balance analysis device. A vibration signal caused by imbalanced rotation of an external input motor is sent into an FIFO (first in first out) connected with the motor after being processed by a front-end signal processing unit; an FFT (fast fourier transform) processor is connected with the FIFO, processed intermediate data and original data are stored in a double-port RAM (random-access memory) unit connected therewith; a data processing unit is connected with the double-port RAM unit to obtain and send quality and relative position of output compensation through calculation to a display unit connected with the double-port RAM unit for displaying; and a control unit is connected with the front-end signal processing unit, the FFT processor, the double-port RAM unit and the data processing unit respectively and used for reading and writing addresses, enabling signals and controlling the starting of related modules. The device greatly improves system resolution and analysis speed of the system by adopting FFT real-time analysis technology, and is applicable to wide popularization in application situations such as dynamic balance detection, vibration analysis, compensation and the like.
Description
Technical field
The utility model relates to a kind of dynamic balance analysis device, relates in particular to a kind of portable dynamic balance detecting device to analysis of vibration measurement such as various main shafts, large-scale turntables.
Background technology
Comprising a large amount of parts that rotate in the conventional machinery, for example various transmission shafts, main shaft, turntable and motor etc. are referred to as solid of revolution.The pressure that bearing is produced is the same when not rotating solid of revolution when rotation in ideal conditions, and such solid of revolution is the solid of revolution of balance.But the various solid of revolution in the engineering, because the inhomogeneous or blank defective of material, the error that produces in processing and the assembling, even design the time just has multiple factors such as asymmetrical geometric configuration, make solid of revolution when rotated, the centrifugal intertia force that each small particle produces on it can not be cancelled out each other, centrifugal intertia force affacts on machinery and the basis thereof by bearing, cause vibration, the vibration amplitude will with the angular velocity of object, the effective mass of the unbalanced point of object, effective radius, and the rigidity of stilt is relevant, produced noise, quicken bearing wear, operation shakiness etc., have a strong impact on the serviceable life of equipment, the precision of security and equipment can damage incidents when serious.For this reason, must carry out equilibrium analysis and compensation, make its balance accuracy grade that reaches permission, or the mechanical vibration amplitude of generation is fallen in allowed limits solid of revolution.
The digitizing of homemade transient equilibrium detection and vibration analysis equipment, intellectuality, integrated still very low, along with people to more and more widely deep understanding of the application of transient equilibrium detection and vibration analysis equipment and increasing demand, the study advanced foreign technology, developing intellectual resource transient equilibrium detection and vibration analysis special chip energetically, catch up with advanced world levels, greatly develop direction and inexorable trend that transient equilibrium detection and the application of vibration analysis special chip in every field have become domestic dynamic balance analysis equipment development.
In addition, on engineering was used, the working environment of most dynamic-balance measuring systems was more abominable, had a lot of other equipment on every side, and electromagnetic interference (EMI) and mechanical disturbance may exist simultaneously, so higher to the requirements such as anti-interference of measuring system.So the raising level of integrated system reduces system complexity, improve system's arithmetic capability, imperative to the transformation of existing test macro.The spot dynamic balance checkout equipment that some external manufacturers provide generally all adopts the method for acceleration transducer and speed probe, cost height so not only, and in some occasion inconvenient operation, so a kind of characteristic according to actual machine equipment, and develop a kind of being suitable in Application in numerical control (NC) System, carrying out the detection system of real-time transient equilibrium monitoring, is very necessary.
Summary of the invention
The utility model is at the proposition of above problem, reflect according to mechanical body compound often feature when moving and develop a kind of utilization, promptly mechanically all vibrations all will be on the characteristics basis of a relation that intercouples, by adopting fast Fourier transform (FFT) accurately to purify, thereby needing to obtain the amplitude of certain characteristic frequency of analyzing and the dynamic balance analysis device that phase place is carried out equilibrium analysis to characteristic frequency.The technological means that the utility model adopts is as follows:
A kind of dynamic balance analysis device comprises: with the analog signals that collects is that the uneven rotation of motor causes vibration signal to convert the front end signal processing unit of digital quantity to;
It is characterized in that also comprising:
Connect the front end signal processing unit, the cell fifo that rotation causes the digital quantity of vibration signal to cushion to outside input motor imbalance;
Connect cell fifo, become the uneven rotation of solid of revolution to cause the fft processor of the amplitude and the phase place of vibration performance frequency the frequency inverted of motor speed correspondence;
Connect fft processor, front end signal processing unit and data processing unit, be used to produce the enabling signal of reading address, write address, enable signal and each correlation module and the control module of control signal;
Connect control module and fft processor, the raw data of outside input is carried out buffer memory, and be used for keeping in two-port RAM storage element through the intermediate data behind the butterfly computation;
Connect the two-port RAM storage element, complex domain data after the FFT processing are asked computing of mould value and Phase Processing, the transient equilibrium vibration data is handled the quality of output compensation and the data processing unit of relative position by the mould value of vibration and the relation of eccentric point quality;
Connect data processing unit, the display unit that the vibration information that the data processing unit that the data processing unit is sent sends and the data of compensated information show;
Above-mentioned each unit carries out data and connects.
Described fft processor comprises address control module, butterfly processing element, twiddle factor table storage unit and inverted order module;
Described address control module is used to produce the read/write address that enable signal, twiddle factor table are searched address and two-port RAM storage element, and the sequential of each unit is controlled;
Described butterfly processing element is used for causing vibration signal to carry out butterfly computation to the uneven rotation of motor of storage two-port RAM storage element;
Described twiddle factor table storage unit is used to store the required twiddle factor of butterfly processing element
Wherein N is a sampling number, and P is the twiddle factor index;
Described inverted order module, the operational data that is used for that butterfly processing element is finished are carried out inverted sequence and are converted to positive sequence, realize that the frequency spectrum normal sequence outputs in the data processing unit;
Described address control module is connected with the two-port RAM storage element, data among the FIFO that is connected with fft processor are written in the two-port RAM storage element, described butterfly processing element is connected with twiddle factor table storage unit, address control module and two-port RAM storage element respectively, causes vibration signal to carry out butterfly computation to the uneven rotation of motor that deposits in the two-port RAM storage element; Described address control module is connected with twiddle factor table storage unit; Described two-port RAM storage element is connected with the inverted order module.
The above-mentioned module of respectively forming all is integrated in the on-site programmable gate array FPGA.
This device adopts FFT real-time analysis technology, has greatly improved systemic resolution and analysis speed.Operating rate is fast, and the integrated level height carries out fft analysis to the sampled point of time-domain signal and can reach true-time operation fully, and this is the most important advantage of numerical analysis device.Simultaneously can be applied in the digital control system testee be carried out the real-time and dynamic on-line monitoring, help improving the precision of measuring and calculating amount of unbalance, reduce mechanical vibration, the prolonged mechanical life-span.It can be applied in the portable transient equilibrium checkout equipment to analysis of vibration measurement such as various main shafts, large-scale turntables, and what can also be applied to other needs transient equilibrium detection and application scenarios such as vibration analysis, compensation.Around this principle in conjunction with the portability of modern electronic product, low-power consumption, low cost, high-performance and characteristic such as highly integrated can be made special chip with this transient equilibrium detection and vibration analysis device.This chip has not only been broken traditional C PU and has been relied on system clock serial executive mode, the a large amount of parallel processing technique and stream line operation modes of hardware used are come optimized Algorithm, faster with adopting DSP and MCU technology to compare data processing speed, resolution, precision are higher, peripheral circuit is simpler, improves the entire system performance greatly.Satisfy high algorithm process of real-time and control, make the data operation ability stronger, circuit designer just can be finished the input of circuit, plant equipment transient equilibrium detection and vibration analysis in a short period of time.When peripheral circuit is done a little change, just can realize different transient equilibrium detections and vibration analysis function with this special chip, so more can show the advantage of the special chip of transient equilibrium detection and vibration analysis.Because it is simple in structure, be convenient to produce and highly versatile, and cost is very cheap is suitable for extensive popularization.
Description of drawings
Fig. 1 is the structured flowchart of the embodiment of device described in the utility model;
Fig. 2 is the structured flowchart of fft processor among the device embodiment described in the utility model.
Embodiment
This dynamic balance analysis device as shown in Figure 1, comprise the front end signal processing unit, be mainly used in gathering and change (the vibrative signal of the uneven rotation of external representation because the motor imbalance is rotated the vibration signal that produces, the frequency that comprises vibration, information such as amplitude and phase place), carry out operations such as AD sampling, adjust the signal input range to reach, the analog quantity of vibration signal is converted to digital quantity, guarantee that the FFT signal Processing has enough bandwidth.FIFO is mainly as the buffer cell (promptly causing vibration signal to cushion to the outside uneven rotation of input motor) of outer input data; The data of outside high-speed AD acquisition are temporary in FIFO, and FIFO is completely afterwards disposable by the time delivers to data in the two-port RAM storage element, is used for fft processor and calculates; Control module: mainly as the controller of each unit co-ordination.Control module is responsible for producing the enabling signal of reading address, write address, enable signal and each correlation module.The two-port RAM storage element is used for the raw data of outside input is carried out buffer memory, and is used for keeping in the intermediate data through behind the butterfly computation, and the inputoutput data of each butterfly row operation all will be through the read-write operation of RAM.Therefore, the frequent read-write operation speed of RAM is bigger to the processing speed influence of FFT.In order to accelerate the arithmetic speed of FFT, need the structure two-port RAM to come the handling capacity of speeding up data transmission; Present embodiment adopts two two-port RAM storage unit (that is: dual port RAM 1 and dual port RAM 2).Display unit is used for the vibration information that the data processing unit that the data processing unit sends is sent and the data of compensated information and shows.Fft processor utilizes Fourier transform that the time-domain signal that high-speed a/d collects is converted to frequency-region signal; Fft processor combines the requirement of FFT real time implementation and chip design dirigibility, realize distributing rationally of parallel algorithm and hardware configuration, improved the FFT processing speed, high-speed, the high resolving power that has satisfied that analysis of vibration signal handles, the requirement of high reliability.Fast fourier transform can accurately be purified to vibration frequency, and can obtain causing the amplitude and the phase place of vibration performance frequency because the solid of revolution imbalance is revolved (being that the uneven rotation of motor causes vibration signal) transduction.Data processing unit is used for the complex domain data after the FFT processing are asked computing of mould value and phase calculation, and according under the certain situation of rotating speed, the mould value and the eccentric point quality of vibration are linearly proportional.The scale-up factor of the mould value by asking initializes quality and vibration signal, under the constant situation of rotating speed, by the mould value and the phase place of measuring vibrations signal once more, utilize this scale-up factor need to determine the quality of compensation (adding or reduction) M and relative position, comprise current rotating speed with output, (promptly obtain the amplitude versus frequency characte and the phase propetry of vibration signal, the amplitude of fundamental frequency signal and phase place reflect the relative mass of eccentric point and the relation of relative position and vibration frequency for quality that need compensate (adding or reduction) and relative position result.)。
Fft processor comprises address control module, butterfly processing element, twiddle factor table storage unit and inverted order module as shown in Figure 2:
The address control module is used for producing enable signal, and plays the sequential control effect of each unit, and produces correct twiddle factor table and search the address, and the read/write address of RAM, and the sequential of each module is control effectively, and guarantees system's operate as normal.
Described butterfly processing element is used for causing vibration signal to carry out the butterfly processing to the uneven rotation of motor of storage two-port RAM storage element.
Described twiddle factor table storage unit, the twiddle factor table comes down to a ROM, is used for storing the needed twiddle factor of each grade FFT computing, and in the N point FFT computing flow graph, every grade all has N/2 butterfly, and each butterfly all will multiply by the factor
Be called twiddle factor, wherein N is a sampling number, and p is called the index of twiddle factor.But twiddle factor at different levels and recycle design are all different.In order to write calculation procedure, should find out twiddle factor earlier
Relation with computing progression.In order to improve arithmetic speed, with twiddle factor
Be made into the ROM table, be used for storing the needed twiddle factor of each grade FFT computing.
Described inverted order module, the operational data that is used for that butterfly processing element is finished are carried out inverted sequence and are converted to positive sequence.
Transient equilibrium detection and vibration analysis device can an integrated chip in (FPGA for example.) also special chip can be set, can adopt Miltilayer wiring structure at chip internal, lower core voltage, abundanter IO pin, capacity can reach about 20k logical block (LES), built-in embedded RAM resource, inner integrated a plurality of digital phase-locked loops, the hardware multiplier of a plurality of embeddings, in conjunction with building of embedded soft CPU of this chip internal and inner peripheral hardware thereof, all these make this chip demonstrate own distinctive advantage in transient equilibrium detection and vibration analysis field.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. dynamic balance analysis device comprises: with the analog signals that collects is that the uneven rotation of motor causes vibration signal to convert the front end signal processing unit of digital quantity to;
It is characterized in that also comprising:
Connect the front end signal processing unit, the cell fifo that rotation causes the digital quantity of vibration signal to cushion to outside input motor imbalance;
Connect cell fifo, become the uneven rotation of solid of revolution to cause the fft processor of the amplitude and the phase place of vibration performance frequency the frequency inverted of motor speed correspondence;
Connect fft processor, front end signal processing unit and data processing unit, be used to produce the enabling signal of reading address, write address, enable signal and each correlation module and the control module of control signal;
Connect control module and fft processor, the raw data of outside input is carried out buffer memory, and be used for keeping in two-port RAM storage element through the intermediate data behind the butterfly computation;
Connect the two-port RAM storage element, complex domain data after the FFT processing are asked computing of mould value and Phase Processing, the transient equilibrium vibration data is handled the quality of output compensation and the data processing unit of relative position by the mould value of vibration and the relation of eccentric point quality;
Connect data processing unit, the display unit that the vibration information that the data processing unit that the data processing unit is sent sends and the data of compensated information show;
Above-mentioned each unit carries out data and connects.
2. a kind of dynamic balance analysis device according to claim 1 is characterized in that described fft processor comprises address control module, butterfly processing element, twiddle factor table storage unit and inverted order module;
Described address control module is used to produce the read/write address that enable signal, twiddle factor table are searched address and two-port RAM storage element, and the sequential of each unit is controlled;
Described butterfly processing element is used for causing vibration signal to carry out butterfly computation to the uneven rotation of motor of storage two-port RAM storage element;
Described twiddle factor table storage unit is used to store the required twiddle factor of butterfly processing element
Wherein N is a sampling number, and P is the twiddle factor index;
Described inverted order module, the operational data that is used for that butterfly processing element is finished are carried out inverted sequence and are converted to positive sequence, realize that the frequency spectrum normal sequence outputs in the data processing unit;
Described address control module is connected with the two-port RAM storage element, data among the FIFO that is connected with fft processor are written in the two-port RAM storage element, described butterfly processing element is connected with twiddle factor table storage unit, address control module and two-port RAM storage element respectively, causes vibration signal to carry out butterfly computation to the uneven rotation of motor that deposits in the two-port RAM storage element; Described address control module is connected with twiddle factor table storage unit; Described two-port RAM storage element is connected with the inverted order module.
3. a kind of dynamic balance analysis device according to claim 1 and 2 is characterized in that the above-mentioned module of respectively forming all is integrated in the on-site programmable gate array FPGA.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201574768U CN202092830U (en) | 2011-05-17 | 2011-05-17 | Dynamic balance analysis device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201574768U CN202092830U (en) | 2011-05-17 | 2011-05-17 | Dynamic balance analysis device |
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| CN202092830U true CN202092830U (en) | 2011-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075847A (en) * | 2013-03-26 | 2014-10-01 | 苏州工业园区聚博精密设备有限公司 | Portable dynamic balance tester and dynamic balance test method by using same |
-
2011
- 2011-05-17 CN CN2011201574768U patent/CN202092830U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075847A (en) * | 2013-03-26 | 2014-10-01 | 苏州工业园区聚博精密设备有限公司 | Portable dynamic balance tester and dynamic balance test method by using same |
| CN104075847B (en) * | 2013-03-26 | 2017-02-08 | 苏州工业园区聚博精密设备有限公司 | Portable dynamic balance tester and dynamic balance test method by using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN KEDE CNC CO., LTD. Free format text: FORMER OWNER: DALIAN GUANGYANG TECHNOLOGY GROUP CO., LTD. Effective date: 20150729 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: DALIAN GUANGYANG TECHNOLOGY GROUP CO., LTD. Free format text: FORMER NAME: DALIAN GUANGYANG SCI. + TECH. ENGINEERING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 116600 No. 6, Longquan street, Dalian Development Zone, Liaoning Patentee after: DALIAN GUANGYANG SCIENCE & TECHNOLOGY GROUP Co.,Ltd. Address before: 116600 No. 6, Longquan street, Dalian Development Zone, Liaoning Patentee before: Dalian Guangyang Science & Technology Engineering Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20150729 Address after: 116600 No. 8, the Yellow Sea street, Dalian economic and Technological Development Zone, Liaoning Patentee after: DALIAN KEDE NUMERICAL CONTROL Co.,Ltd. Address before: 116600 No. 6, Longquan street, Dalian Development Zone, Liaoning Patentee before: DALIAN GUANGYANG SCIENCE & TECHNOLOGY GROUP Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 116600 No. 8, the Yellow Sea street, Dalian economic and Technological Development Zone, Liaoning Patentee after: KEDE NUMERICAL CONTROL Co.,Ltd. Address before: 116600 No. 8, the Yellow Sea street, Dalian economic and Technological Development Zone, Liaoning Patentee before: DALIAN KEDE NUMERICAL CONTROL Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |