CN208012758U - A kind of on-line vibration harvester for collecting sensor signal state of testing oneself - Google Patents
A kind of on-line vibration harvester for collecting sensor signal state of testing oneself Download PDFInfo
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- CN208012758U CN208012758U CN201820541076.9U CN201820541076U CN208012758U CN 208012758 U CN208012758 U CN 208012758U CN 201820541076 U CN201820541076 U CN 201820541076U CN 208012758 U CN208012758 U CN 208012758U
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Abstract
The utility model discloses a kind of on-line vibration harvester for collecting sensor signal state of testing oneself, which includes the vibration signals collecting unit being sequentially connected, vibration signal conditioning unit, multiplexing analog switch unit, anti alias filter unit, high-precision adc sampling unit and central processing unit；The vibration signal conditioning unit is used to the collected vibration signal of vibration signals collecting unit received being sent to the multiplexing analog switch unit.Device provided by the present application inside Acquisition Instrument by being arranged the analog switch of multiplexing, the test signal that Digital Frequency Synthesize chip DDS is generated can be accessed, central processing unit samples test signal by ADC, and the test case in channel is judged after being compared.
Description
Technical field
The utility model is related to signal acquisition test systems technology field, can test oneself sensor signal more particularly to one kind
The on-line vibration harvester of acquisition state.
Background technology
Using multi-channel portable vibration acquisition analytical instrument, using vibrational state detection and vibrating data analysis technology,
The diagnosis that effectively assessment can be made to set state, carry out defect and failure is to realize that unit starting, shutdown, load become
The main means of vibrational state test and analysis under dynamic, vibration fault and other special operation conditions.Currently, having both at home and abroad many
Multichannel vibration acquisition analyzer product, it is most of all to use microcontroller, microprocessor or the technologies such as embedded, and answer extensively
For the engineering of unit regulation and Vibration Treatment reality.On-line vibration harvester in the prior art carries out teledata for a long time
Acquisition can be led to the acquisition distortion of its acceleration signal by surrounding environment influence or electronic component aging, damage.Generally exist
Linearly coupled device has 8 roads to 16 road vibrating channels, channel it is normal whether be related to the quality of acquisition signal.
Utility model content
The utility model provides a kind of on-line vibration harvester for collecting sensor signal state of testing oneself.
The utility model provides following scheme：
A kind of on-line vibration harvester for collecting sensor signal state of testing oneself, including：
It is the vibration signals collecting unit that is sequentially connected, vibration signal conditioning unit, multiplexing analog switch unit, anti-mixed
Filter cell, high-precision adc sampling unit and central processing unit；The vibration signal conditioning unit will be for that will receive
The collected vibration signal of vibration signals collecting unit be sent to the multiplexing analog switch unit；
Direct digital synthesis technique unit, the direct digital synthesis technique unit respectively with the central processing unit with
And the multiplexing analog switch unit is connected；The direct digital synthesis technique unit is for production test signal and by institute
It states test signal and is sent to the multiplexing analog switch unit；
Wherein, the multiplexing analog switch unit is connected with the central processor unit；The multiplexing mould
The instruction of testing oneself that quasi- switch unit is used to be sent according to the central control unit received, so as to instruction of testing oneself according to
The vibration signal that will be imparted to anti alias filter unit is switched to the test signal that the direct digital synthesis technique unit is sent.
Preferably：It is connected with electricity between the direct digital synthesis technique unit and the multiplexing analog switch unit
Pressure follows unit.
Preferably：The direct digital synthesis technique unit includes AD9832 chips；The voltage follow unit includes
AD8065 chips.
Preferably：The vibration signals collecting unit includes IEPE acceleration transducers；The multiplexing analog switch
Unit includes multigroup MAX333A chips.
Preferably：The multiplexing analog switch unit includes 2-4 group MAX333A chips.
Preferably：The central processing unit is the processing unit based on FPGA Yu ARM chip architectures.
Preferably：Further include the communication unit being connected with the central processing unit and storage unit.
According to specific embodiment provided by the utility model, the utility model discloses following technique effects：
By the utility model, a kind of on-line vibration acquisition dress for collecting sensor signal state of testing oneself may be implemented
It sets, in an implementation mode, which may include the vibration signals collecting unit being sequentially connected, vibration signal conditioning list
Member, multiplexing analog switch unit, anti alias filter unit, high-precision adc sampling unit and central processing unit；It is described
Vibration signal conditioning unit is used to the collected vibration signal of vibration signals collecting unit received being sent to described
Multiplex analog switch unit；Direct digital synthesis technique unit, the direct digital synthesis technique unit respectively with it is described
Central processing unit and the multiplexing analog switch unit are connected；The direct digital synthesis technique unit is for producing
The test signal is simultaneously sent to the multiplexing analog switch unit by test signal；Wherein, the multiplexing simulation
Switch unit is connected with the central processor unit；The multiplexing analog switch unit is used for according to receiving
The instruction of testing oneself that central control unit is sent, so that instruction of testing oneself according to will be imparted to the vibration letter of anti alias filter unit
Number it is switched to the test signal that the direct digital synthesis technique unit is sent.Device provided by the present application passes through in Acquisition Instrument
The analog switch of portion's setting multiplexing, can access the test signal that Digital Frequency Synthesize chip DDS is generated, central processing list
Member samples test signal by ADC, and the test case in channel is judged after being compared.
Certainly, any product for implementing the utility model does not necessarily require achieving all the advantages described above at the same time.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of on-line vibration acquisition for collecting sensor signal state of testing oneself that the utility model embodiment provides
The connection block diagram of device；
Fig. 2 is the circuit of direct digital synthesis technique unit and voltage follow unit that the utility model embodiment provides
Figure.
In figure：Vibration signals collecting unit 1, vibration signal conditioning unit 2, multiplexing analog switch unit 3, anti-mixed filter
Wave device unit 4, high-precision adc sampling unit 5, central processing unit 6, direct digital synthesis technique unit 7, voltage follow unit
8, communication unit 9, storage unit 10.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, the every other embodiment that those of ordinary skill in the art are obtained all belongs to
In the range of the utility model protection.
Embodiment
Referring to Fig. 1, Fig. 2, a kind of collecting sensor signal state of testing oneself for providing for the utility model embodiment
Linearly coupled harvester, as shown in Figure 1 and Figure 2, the device include the vibration signals collecting unit 1 being sequentially connected, vibration signal tune
Manage unit 2, multiplexing analog switch unit 3,4 yuan of anti alias filter list, high-precision adc sampling unit 5 and central processing
Unit 6；The vibration signal conditioning unit 2 is used to believe the 1 collected vibration of the vibration signals collecting unit received
Number it is sent to the multiplexing analog switch unit 3；
Direct digital synthesis technique unit 7, the direct digital synthesis technique unit 7 respectively with the central processing unit
6 and the multiplexing analog switch unit 3 be connected；The direct digital synthesis technique unit 7 is used for production test signal
And the test signal is sent to the multiplexing analog switch unit；
Wherein, the multiplexing analog switch unit 3 is connected with the central processor unit 6；The multiplexing
The instruction of testing oneself that analog switch unit 3 is used to be sent according to the central control unit 6 received, to test oneself according to
The vibration signal that instruction will be imparted to anti alias filter unit 4 is switched to the survey that the direct digital synthesis technique unit 7 is sent
Trial signal.
Further, it is connected between the direct digital synthesis technique unit 7 and the multiplexing analog switch unit 3
There is voltage follow unit 8.The direct digital synthesis technique unit 7 includes AD9832 chips；The voltage follow unit 8 includes
AD8065 chips.The multiplexing analog switch unit 3 includes multigroup MAX333A chips.The multiplexing analog switch
Unit 3 includes 2-4 group MAX333A chips.The central processing unit 6 is the processing list based on FPGA Yu ARM chip architectures
Member.Further include the communication unit 9 being connected with the central processing unit 6 and storage unit 10.
The vibration signals collecting unit 1 includes IEPE acceleration transducers.IEPE acceleration sensings provided by the present application
Device refers to a kind of from carried charge amplifier or the acceleration transducer of voltage amplifier.IEPE is the contracting of piezoelectricity integrated circuit
It writes.Because the electricity generated by acceleration transducer is very little, therefore the electric signal that sensor generates is highly susceptible to noise
Interference, needs to be amplified it with sensitive electronic device and signal condition.Sensitive electronic device is integrated in IEPE to be made
It ensures better noise immunity close proximity to sensor and is easier to encapsulate.
The acquisition principle of traditional on-line vibration harvester is to be linked into vibration signals collecting unit 1 by vibration signal
Afterwards, friendship is taken by 2 blocking of vibration signal conditioning unit, after anti alias filter unit 4, arrives high-precision adc sampling unit 5
Analog-to-digital conversion is carried out, central processing unit 6 is finally arrived and carries out data processing and data upload.
Scheme provided by the present application is added before anti alias filter unit 4 more than one after vibration signal conditioning unit 2
Road multiplexed analog switch unit 3, this switch control its signal by central processing unit 6 and choose.Direct digital synthesis technique unit 7
It is responsible for generating a series of test signal of high, medium and low frequencies under the control of central processing unit 6, and is linked into multiplexing mould
In quasi- switch unit 3.In order to ensure that the voltage stability of 7 output signal of direct digital synthesis technique unit, this programme add
Voltage follow unit 8 ensures the voltage follow of output signal.
Under the pattern tested oneself into row of channels, central processing unit 6 will multiplex the signal mode of analog switch unit 3
The test signal that direct digital synthesis technique unit 7 generates is switched to from vibration signal.Test signal is sampled by high-precision adc
Unit 5 is obtained by central processing unit 6.Central processing unit 6 carries out at the signal of time domain and frequency domain the signal that sampling obtains
The difference for managing and comparing the test signal that acquisition signal is generated with direct digital synthesis technique unit 7, thus analyzes harvester
Lane testing state is finally uploaded to host computer by the channel status of itself by communication unit.
Vibration signals collecting unit 1 is generally the acquisition of 8-16 paths, and one group of MAX333A can support 4 paths to switch,
2-4 groups MAX333A can complete the scheme of testing oneself.
The workflow position of the device：
1, host computer is assigned to central processing unit by communication unit and tests oneself into row of channels.
2, central processing unit enters channel self test mode, is instructed by the COM pins of MAX333A, by the private mould of multichannel
The signal access of quasi- device switch MAX333A is switched to the test signal that DDS is synthesized from vibration signal
3, central processing unit sequentially enters high, medium and low frequency self test mode, the corresponding Digital Frequency Synthesize DDS cores that allow respectively
Piece AD9832 generates three groups of high, medium and low frequency Self-test signals, amplitude 1, and frequency is respectively：3150Hz, 315Hz, 31.5Hz；
4, corresponding three kinds of self test modes, the sample frequency of system set gradually as 25.6kHz, 2.56kHz, 256Hz；Sampling
Line number is unified for 3200, number of samples 8192.
5, the signal obtained to sampling seeks its time domain RMS value, peak value；FFT transform is carried out to signal, seeks it in signal
Generate frequency location（3150Hz, 315Hz, 31.5Hz）Amplitude.
6, the reality for the signal that the theoretical value and actual samples for the Self-test signal that comparison Digital Frequency Synthesize DDS is generated obtain
Value：RMS value, peak value, signal generate frequency location（3150Hz, 315Hz, 31.5Hz）Amplitude, calculate its error.
7, it is more than the channel of given threshold for error, judges its channel abnormal.
8, test result is uploaded to host computer.
In short, device provided by the present application can be accessed by the way that the analog switch of multiplexing is arranged inside Acquisition Instrument
The test signal that Digital Frequency Synthesize chip DDS is generated, central processing unit sample test signal by ADC, are compared
The test case in channel is judged after analysis.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above is only the preferred embodiment of the utility model only, is not intended to limit the protection model of the utility model
It encloses.Any modification, equivalent substitution, improvement and etc. made within the spirit and principle of the present invention, are all contained in this reality
With in novel protection domain.
Claims (7)
1. a kind of on-line vibration harvester for collecting sensor signal state of testing oneself, which is characterized in that including：
Vibration signals collecting unit, vibration signal conditioning unit, multiplexing analog switch unit, the anti-aliasing filtering being sequentially connected
Device unit, high-precision adc sampling unit and central processing unit；The institute that the vibration signal conditioning unit is used to receive
It states the collected vibration signal of vibration signals collecting unit and is sent to the multiplexing analog switch unit；
Direct digital synthesis technique unit, the direct digital synthesis technique unit respectively with the central processing unit and institute
Multiplexing analog switch unit is stated to be connected；The direct digital synthesis technique unit is for production test signal and by the survey
Trial signal is sent to the multiplexing analog switch unit；Wherein, the multiplexing analog switch unit and the center
Processor unit is connected；What the multiplexing analog switch unit was used to be sent according to the central control unit received
It tests oneself instruction, so that the vibration signal that instruction of testing oneself according to will be imparted to anti alias filter unit is switched to the direct number
The test signal that word frequency synthesis unit is sent.
2. the on-line vibration harvester of collecting sensor signal state according to claim 1 of testing oneself, feature exist
In being connected with voltage follow unit between the direct digital synthesis technique unit and the multiplexing analog switch unit.
3. the on-line vibration harvester of collecting sensor signal state according to claim 2 of testing oneself, feature exist
In the direct digital synthesis technique unit includes AD9832 chips；The voltage follow unit includes AD8065 chips.
4. the on-line vibration harvester of collecting sensor signal state according to claim 1 of testing oneself, feature exist
In the vibration signals collecting unit includes IEPE acceleration transducers；The multiplexing analog switch unit includes multigroup
MAX333A chips.
5. the on-line vibration harvester of collecting sensor signal state according to claim 4 of testing oneself, feature exist
In the multiplexing analog switch unit includes 2-4 group MAX333A chips.
6. the on-line vibration harvester of collecting sensor signal state according to claim 1 of testing oneself, feature exist
In the central processing unit is the processing unit based on FPGA Yu ARM chip architectures.
7. the on-line vibration acquisition dress of the collecting sensor signal state of testing oneself according to claim 1 to 6 any one
It sets, which is characterized in that further include the communication unit being connected with the central processing unit and storage unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111913121A (en) * | 2020-09-04 | 2020-11-10 | 湖州快驴科技有限公司 | Detection method capable of detecting voltage of each string in battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111913121A (en) * | 2020-09-04 | 2020-11-10 | 湖州快驴科技有限公司 | Detection method capable of detecting voltage of each string in battery |
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Effective date of registration: 20240301 Address after: F17, Block C, International Investment Building, No. 6-9, Fuchengmen North Street, Xicheng District, Beijing 100,034 Patentee after: Longyuan (Beijing) New Energy Engineering Technology Co.,Ltd. Country or region after: China Address before: 100089 616, 6th floor, Sino foreign exchange building, 52 Zhongguancun South Street, Haidian District, Beijing Patentee before: ZHONGNENG POWER-TECH DEVELOPMENT Co.,Ltd. Country or region before: China |