CN109660258A - A kind of method, apparatus and system of multichannel synchronousing collection difference sample frequency data - Google Patents
A kind of method, apparatus and system of multichannel synchronousing collection difference sample frequency data Download PDFInfo
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- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
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Abstract
The present invention relates to data acquisition technology fields, disclose the method, apparatus and system of a kind of multichannel synchronousing collection difference sample frequency data.By first periodically acquiring the different data from each measuring point with highest sampling frequency synchronization, then for the different data acquired in same collection period, parameter is set according to one-to-one sample frequency and successively carries out digital filtering processing and sample process, it obtains meeting the data slot that corresponding sample frequency requires, it is possible thereby to realize the synchronized sampling purpose of the different sample frequency Wave datas of same observation station/multi-measuring point, it is particularly suitable for the synchronous acquisition scene of the Wave data of different types of data, simultaneously because realizing anti-aliasing filter without using a programmable low-pass analog filter, hardware cost can be substantially reduced, convenient for practical promotion and application.
Description
Technical field
The invention belongs to data acquisition technology fields, and in particular to a kind of multichannel synchronousing collection difference sample frequency data
Method, apparatus and system.
Background technique
When machine performance monitors field, carries out diagnostic analysis to vibration condition, synchronization acquisition is generally required
The vibration wave figurate number of multiple vibration measuring points, a variety of different sample frequencys and different types of data (such as acceleration, speed, displacement)
According to.Although many data collection systems can be realized synchronization and carry out synchronous data sampling under a certain sample frequency now
Purpose, but these schemes also need to realize anti-aliasing filter using a programmable low-pass analog filter on hardware
Wave so both increases hardware cost, while also cannot achieve the different sample frequency Wave datas of same observation station/multi-measuring point
Synchronized sampling is particularly unsuitable for the synchronous acquisition scene of the Wave data of different types of data.
Summary of the invention
It cannot achieve the synchronized sampling purpose of different sample frequency data and hard to solve available data acquisition system
Part problem at high cost, it is an object of that present invention to provide a kind of methods of multichannel synchronousing collection difference sample frequency data, dress
It sets and system.
The technical scheme adopted by the invention is as follows:
A kind of method of multichannel synchronousing collection difference sample frequency data, includes the following steps:
S101. the capture setting information of each measuring point equipment is obtained, wherein the capture setting packet contains M frequency
It is different and be FMaxThe sample frequency setting parameter and sampling number of/N, FMaxFor the highest of multi-channel synchronous ADC analog-digital converter
Sample frequency, M and N are respectively natural number；
S102. the capture setting information for analyzing all measuring point equipment, determines the longest sampling time；
S103. using the longest sampling time as collection period T, it is periodical to control the multi-channel synchronous ADC analog-digital converter
Ground is with highest sample frequency FMaxDifferent data of the synchronous acquisition from each measuring point equipment；
S104. for the different data acquired in same collection period T, parameter is arranged according to one-to-one sample frequency
Digital filtering processing and sample process are successively carried out, obtains meeting the data slot that corresponding sample frequency requires.
Optimization, the capture setting information also includes cutoff frequency, data type, the original signal of measuring point equipment side
Frequency range and/or setting field related with Practical Project data processing.
Optimization, the capture setting information from the setting software with measuring point coordinative composition of equipments, and can by local area network, mutually
Networking or communication bus progress are remotely located, or local set is carried out by way of movable storage device importing configuration files
It sets.
Optimization, before acquiring the data from measuring point equipment, first to original letter to be collected and from measuring point equipment
Number carry out cutoff frequency be FMaxLow-pass filtering.
Another technical solution of the present invention are as follows:
A kind of device of multichannel synchronousing collection difference sample frequency data, including multi-channel synchronous ADC analog-digital converter,
Obtain module, analysis module, control module and processing module；
The acquisition module, for obtaining the capture setting information of each measuring point equipment, wherein the capture setting packet
It containing M frequency difference and is FMaxThe sample frequency setting parameter and sampling number of/N, FMaxTurn for multi-channel synchronous ADC modulus
The highest sample frequency of parallel operation, M and N are respectively natural number；
The analysis module communicates to connect the acquiring unit, for analyzing the capture setting information of all measuring point equipment,
Determine the longest sampling time；
The control module communicates to connect the analysis module and the multi-channel synchronous ADC analog-digital converter respectively, uses
In using the longest sampling time as collection period T, controls the multi-channel synchronous ADC analog-digital converter and periodically sampled with highest
Frequency FMaxDifferent data of the synchronous acquisition from each measuring point equipment；
The processing module communicates to connect the acquisition module and the control module respectively, for for same acquisition week
The different data acquired in phase T is arranged parameter according to one-to-one sample frequency and successively carries out digital filtering processing and sampling
Processing obtains meeting the data slot that corresponding sample frequency requires.
Optimization, further include low-pass filter, wherein the low-pass filter is connected to the multi-channel synchronous ADC mould
The input terminal of number converter, for it is to be collected and from the original signal of measuring point equipment carry out cutoff frequency be FMaxIt is low
Pass filter.
Another technical solution of the present invention are as follows:
A kind of system of multichannel synchronousing collection difference sample frequency data, including multi-core processor, multi-channel synchronous ADC
Analog-digital converter and multiple measuring point equipment, wherein the multi-core processor includes that ARM nuclear unit, DSP core unit, multicore are shared
Storage unit and the internal bus for communicating to connect these units, the ARM nuclear unit also communicate to connect the multi-channel synchronous
The output end of ADC analog-digital converter, the input terminal of the multi-channel synchronous ADC analog-digital converter are separately connected each measuring point
Equipment；
On the one hand the ARM nuclear unit is used to obtain the capture setting information of each measuring point equipment, and analyze all measuring points and set
Standby capture setting information, determines the longest sampling time, on the other hand for controlling using the longest sampling time as collection period T
The multi-channel synchronous ADC analog-digital converter is periodically with highest sample frequency FMaxSynchronous acquisition is from each measuring point equipment
Different data, wherein the capture setting packet contains M frequency difference and is FMax/ N sample frequency setting parameter and
Sampling number, FMaxFor the highest sample frequency of multi-channel synchronous ADC analog-digital converter, M and N are respectively natural number；
The multicore shared memory cell is used to be stored in all different data acquired in collection period T；
The DSP core unit is used for after receiving the period acquisition completion command from the ARM nuclear unit, from described more
All different data acquired in same collection period T are read in core shared memory cell, then in same collection period T
The different data of acquisition is arranged parameter according to one-to-one sample frequency and successively carries out digital filtering processing and sample process,
It obtains meeting the data slot that corresponding sample frequency requires.
Optimization, between the input terminal and each measuring point equipment of the multi-channel synchronous ADC analog-digital converter, also
Being respectively arranged with cutoff frequency is FMaxLow-pass filter, the low-pass filter is used for to be collected and survey from corresponding
The original signal of point device is filtered.
The invention has the benefit that
(1) the invention provides a kind of method, apparatus of multichannel synchronousing collection difference sample frequency data and is
System first periodically acquires the different data from each measuring point with highest sampling frequency synchronization, be then directed to same acquisition
The different data acquired in period is arranged parameter according to one-to-one sample frequency and successively carries out digital filtering processing and sampling
Processing obtains meeting the data slot that corresponding sample frequency requires, it is possible thereby to realize the different samplings of same observation station/multi-measuring point
The synchronized sampling purpose of frequency Wave data is particularly suitable for the synchronous acquisition scene of the Wave data of different types of data, together
When due to realizing anti-aliasing filter without using a programmable low-pass analog filter, can substantially reduce hardware at
This, is convenient for practical promotion and application.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the method flow schematic diagram of multichannel synchronousing collection difference sample frequency data provided by the invention.
Fig. 2 is the apparatus structure schematic diagram of multichannel synchronousing collection difference sample frequency data provided by the invention.
Fig. 3 is the system structure diagram of multichannel synchronousing collection difference sample frequency data provided by the invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further elaborated.It should be noted that for this
The explanation of a little way of example is used to help understand the present invention, but and does not constitute a limitation of the invention.It is disclosed herein specific
Structure and function details is only used for description example embodiments of the present invention.However, this hair can be embodied with many alternative forms
It is bright, and be not construed as limiting the invention in embodiment set forth herein.
It will be appreciated that though term first, second etc. can be used herein to describe various units, these units are not answered
When being limited by these terms.These terms are only used to distinguish a unit and another unit.Such as it can be single by first
Member is referred to as second unit, and similarly second unit can be referred to as first unit, real without departing from example of the invention
Apply the range of example.
It should be appreciated that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can be with
There are three kinds of relationships, for example, A and/or B, can indicate: individualism A, individualism B exist simultaneously tri- kinds of situations of A and B,
The terms "/and " are to describe another affiliated partner relationship, indicate may exist two kinds of relationships, can be with for example, A/ and B
Indicate: two kinds of situations of individualism A, individualism A and B, in addition, character "/" herein, typicallying represent forward-backward correlation object is
A kind of "or" relationship.
It should be appreciated that when by unit referred to as with another unit " connection ", " connected " or " coupling " when, it can with it is another
A unit is directly connected or couples or temporary location may exist.Relatively, it is referred to as with another unit " directly when by unit
It is connected " or when " direct-coupling ", temporary location is not present.It should explain in a similar manner for describing the relationship between unit
Other words (for example, " ... between " to " between directly existing ... ", " adjacent " is to " direct neighbor " etc.).
Terms used herein are only used for description specific embodiment, and are not intended to limitation example embodiments of the present invention.
As it is used herein, singular "a", "an" and "the" is intended to include plural form, unless context is explicitly indicated
Contrary.It should also be understood that term " includes ", " including ", "comprising", and/or " containing " are as used herein,
Specified stated feature, integer, step, operation, unit and/or component existence, and be not excluded for it is one or more its
His feature, quantity, step, operation, unit, component and/or their combination existence or increase.
It will be further noted that the function action occurred may be with the sequence of attached drawing appearance in some alternative embodiments
It is different.Such as it depends on substantially being executed concurrently in related function action, or sometimes can be with
Opposite sequence executes continuously show two figures.
Specific details is provided, in the following description in order to which example embodiment is understood completely.However ability
Domain those of ordinary skill is it is to be understood that implementation example embodiment without these specific details.Such as it can be
System is shown in block diagram, to avoid with unnecessary details come so that example is unclear.It in other embodiments, can not be with non-
Necessary details shows well-known process, structure and technology, to avoid making example embodiment unclear.
Embodiment one
As shown in Figure 1, the method for the multichannel synchronousing collection difference sample frequency data provided in this embodiment, including
Following steps.
S101. the capture setting information of each measuring point equipment is obtained, wherein the capture setting packet contains M frequency
It is different and be FMaxThe sample frequency setting parameter and sampling number of/N, FMaxFor multi-channel synchronous ADC (Analog-to-
Digital Converter refers to A/D converter or analog/digital converter) the highest sample frequency of analog-digital converter, M
It is respectively natural number with N.
In the step S101, the measuring point equipment for be arranged in point position and generate original signal (this is original
Signal can be acquired by the multi-channel synchronous ADC analog-digital converter, and then obtain corresponding sampled data), can with but it is unlimited
In for sensor for various purposes, such as being arranged in mechanical oscillation point position and producing the vibration of vibration waveform signal
Sensor, produce Acceleration pulse signal acceleration transducer, produce velocity wave form signal velocity sensor and can
Generate the displacement sensor etc. of displacement waveform signal.Optimization, the capture setting information can with but be not limited to include cut
Only frequency, data type, the original signal frequency range of measuring point equipment side and/or setting related with Practical Project data processing
Field etc..In addition, the capture setting information is from the setting software with measuring point coordinative composition of equipments, and local area network, interconnection can be passed through
Net or communication bus progress are remotely located, or are locally located by way of movable storage device importing configuration files,
Wherein, the communication bus can be, but not limited to as RS485 bus, CAN bus or RS232 bus etc., and the mobile storage is set
It is standby to can be, but not limited to as USB flash disk or stored CD etc..
S102. the capture setting information for analyzing all measuring point equipment, determines the longest sampling time.
In the step S102, specifically, it is preferred that determining the longest sampling time: basis first in the following way
Each sample frequency setting parameter and sampling number, pass through sampling period (i.e. the inverse of sample frequency) and the product of sampling number
Multiple sampling times are calculated in mode, then find the numerical value maximum sampling time, as the longest sampling time.Such as
For capture setting information are as follows: (1) sample frequency 5000Hz, sampling number 1000；(2) sample frequency 1000Hz, sampling number
3000；(3) sample frequency 1250Hz, sampling number 500；Multiple sampling times can first be calculated: (1) 0.2 second；(2) 3 seconds；
(3) 0.4 seconds；Finally determine that 3 seconds are the longest sampling time.
S103. using the longest sampling time as collection period T, it is periodical to control the multi-channel synchronous ADC analog-digital converter
Ground is with highest sample frequency FMaxDifferent data of the synchronous acquisition from each measuring point equipment.
In the step S103, in order to ensure the multi-channel synchronous ADC analog-digital converter occurs in collection process
Data aliasing, optimization, before acquiring the data from measuring point equipment, first to original to be collected and from measuring point equipment
It is F that beginning signal, which carries out cutoff frequency,MaxLow-pass filtering.It advanced optimizes, considers for hardware cost, used low pass
Filter can be, but not limited to for be made of resistive element and/or reactance component T-shape low-pass filter, " L " type low pass filtered
Wave device or " π " type low-pass filter etc..In addition, the multi-channel synchronous ADC analog-digital converter is to support multi-channel synchronous data
The existing device of acquisition.
S104. for the different data acquired in same collection period T, parameter is arranged according to one-to-one sample frequency
Digital filtering processing and sample process are successively carried out, obtains meeting the data slot that corresponding sample frequency requires.
In the step S104, citing, the first data (this for being 1000Hz for corresponding sample frequency setting parameter
When highest sample frequency FMaxIt is set as 5000Hz), it can first carry out the digital filtering that low-pass cut-off frequencies are 1000Hz and handle, so
5 sample process for taking out 1 are carried out to sampled point again afterwards, obtain the data slot for meeting corresponding sample frequency 1000Hz；And for right
Answer the first data (F at this time that sample frequency setting parameter is 2500HzMaxIt is set as 5000Hz), it can first carry out low pass cutoff frequency
The digital filtering that rate is 2500Hz is handled, and then carries out 2 sample process for taking out 1 to sampled point again, obtains meeting corresponding sampling frequency
The data slot of rate 2500Hz.
From there through the detailed description of abovementioned steps S101~S104, i.e., first periodically adopted with highest sampling frequency synchronization
Collect the different data from each measuring point, then for the different data acquired in same collection period, according to one-to-one
Sample frequency setting parameter successively carries out digital filtering processing and sample process, obtains meeting the data that corresponding sample frequency requires
Segment, it is especially suitable so as to realize the synchronized sampling purpose of the different sample frequency Wave datas of same observation station/multi-measuring point
In the synchronous acquisition scene of the Wave data of different types of data, simultaneously because being filtered without using a programmable low-passed analog
Wave device realizes anti-aliasing filter, can substantially reduce hardware cost, is convenient for practical promotion and application.
To sum up, using the method for multichannel synchronousing collection difference sample frequency data provided by the present embodiment, have such as
Lower technical effect:
(1) a kind of method for present embodiments providing multichannel synchronousing collection difference sample frequency data, i.e., first periodically
Ground acquires the different data from each measuring point with highest sampling frequency synchronization, then not for acquisition in same collection period
Same data are arranged parameter according to one-to-one sample frequency and successively carry out digital filtering processing and sample process, met
The data slot that corresponding sample frequency requires, it is possible thereby to realize the different sample frequency Wave datas of same observation station/multi-measuring point
Synchronized sampling purpose, the synchronous acquisition scene of the Wave data of different types of data is particularly suitable for, simultaneously because without making
Anti-aliasing filter is realized with a programmable low-pass analog filter, can substantially reduce hardware cost, convenient for actually pushing away
Wide and application.
Embodiment two
A kind of device for realizing one the method for embodiment is present embodiments provided, including multi-channel synchronous ADC modulus turns
Parallel operation obtains module, analysis module, control module and processing module；The acquisition module, for obtaining adopting for each measuring point equipment
Collect setting information, wherein the capture setting packet contains M frequency difference and is FMaxParameter is arranged in the sample frequency of/N
And sampling number, FMaxFor the highest sample frequency of multi-channel synchronous ADC analog-digital converter, M and N are respectively natural number；Described point
It analyses module and communicates to connect the acquiring unit, for analyzing the capture setting information of all measuring point equipment, when determining longest sampling
Between；The control module communicates to connect the analysis module and the multi-channel synchronous ADC analog-digital converter respectively, for most
The long sampling time is collection period T, controls the multi-channel synchronous ADC analog-digital converter periodically with highest sample frequency
FMaxDifferent data of the synchronous acquisition from each measuring point equipment；The processing module communicates to connect the acquisition module and institute respectively
Control module is stated, for being arranged according to one-to-one sample frequency and joining for the different data acquired in same collection period T
Number successively carries out digital filtering processing and sample process, obtains meeting the data slot that corresponding sample frequency requires.
Optimization, further include low-pass filter, wherein the low-pass filter is connected to the multi-channel synchronous ADC mould
The input terminal of number converter, for it is to be collected and from the original signal of measuring point equipment carry out cutoff frequency be FMaxIt is low
Pass filter.
The technical detail and technical effect and embodiment one of the present embodiment are consistent, can be obtained based on one direct derivation of embodiment
It arrives, is repeated no more in this.
Embodiment three
The present embodiment is as another multichannel synchronousing collection difference sampling with embodiment two with identical inventive concept
The system of frequency data, including multi-core processor, multi-channel synchronous ADC analog-digital converter and multiple measuring point equipment, wherein described
Multi-core processor includes that (Advanced RISC Machines is an esbablished corporation of microprocessor industry, devises ARM
Big quantity high performance, risc processor, the relevant technologies and software cheap, energy consumption is low) nuclear unit, DSP (Digital Signal
Processin, Digital Signal Processing) nuclear unit, multicore shared memory cell and the internal bus for communicating to connect these units,
The ARM nuclear unit also communicates to connect the output end of the multi-channel synchronous ADC analog-digital converter, the multi-channel synchronous ADC
The input terminal of analog-digital converter is separately connected each measuring point equipment；On the one hand the ARM nuclear unit is used to obtain each measuring point
The capture setting information of equipment, and the capture setting information of all measuring point equipment is analyzed, determine the longest sampling time, on the other hand
For controlling the multi-channel synchronous ADC analog-digital converter and periodically being adopted with highest using the longest sampling time as collection period T
Sample frequency FMaxDifferent data of the synchronous acquisition from each measuring point equipment, wherein the capture setting packet contains M frequency
It is different and be FMaxThe sample frequency setting parameter and sampling number of/N, FMaxFor the highest of multi-channel synchronous ADC analog-digital converter
Sample frequency, M and N are respectively natural number；The multicore shared memory cell is used to be stored in all of the interior acquisition of collection period T
Different data；The DSP core unit is used for after receiving the period acquisition completion command from the ARM nuclear unit, from described
All different data acquired in same collection period T are read in multicore shared memory cell, are then directed to same collection period T
The different data of interior acquisition is arranged parameter according to one-to-one sample frequency and successively carries out at digital filtering processing and sampling
Reason obtains meeting the data slot that corresponding sample frequency requires.The multi-core processor be at least one ARM nuclear unit and
The processor of the dinuclear of at least one DSP core unit or more, comprising with an ARM nuclear unit and DSP core unit
Dual core processor.
Optimization, between the input terminal and each measuring point equipment of the multi-channel synchronous ADC analog-digital converter, also
Being respectively arranged with cutoff frequency is FMaxLow-pass filter, the low-pass filter is used for to be collected and survey from corresponding
The original signal of point device is filtered.
The technical detail and technical effect of the present embodiment are similar to embodiment two, can also be based on one direct derivation of embodiment
It obtains, is repeated no more in this.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (8)
1. a kind of method of multichannel synchronousing collection difference sample frequency data, which comprises the steps of:
S101. the capture setting information of each measuring point equipment is obtained, wherein it is different that the capture setting packet contains M frequency
It and is FMaxThe sample frequency setting parameter and sampling number of/N, FMaxIt is sampled for the highest of multi-channel synchronous ADC analog-digital converter
Frequency, M and N are respectively natural number；
S102. the capture setting information for analyzing all measuring point equipment, determines the longest sampling time；
S103. using the longest sampling time as collection period T, control the multi-channel synchronous ADC analog-digital converter periodically with
Highest sample frequency FMaxDifferent data of the synchronous acquisition from each measuring point equipment；
S104. for the different data acquired in same collection period T, parameter is arranged successively according to one-to-one sample frequency
Digital filtering processing and sample process are carried out, obtains meeting the data slot that corresponding sample frequency requires.
2. a kind of method of multichannel synchronousing collection difference sample frequency data as described in claim 1, it is characterised in that:
The capture setting information also include cutoff frequency, data type, the original signal frequency range of measuring point equipment side and/
Or setting field related with Practical Project data processing.
3. a kind of method of multichannel synchronousing collection difference sample frequency data as described in claim 1, it is characterised in that:
The capture setting information can pass through local area network, internet or communication from the setting software with measuring point coordinative composition of equipments
Bus progress is remotely located, or is locally located by way of movable storage device importing configuration files.
4. a kind of method of multichannel synchronousing collection difference sample frequency data as described in claim 1, it is characterised in that:
Before acquiring the data from measuring point equipment, first to it is to be collected and from the original signal of measuring point equipment carry out cutoff frequency
Rate is FMaxLow-pass filtering.
5. a kind of device of multichannel synchronousing collection difference sample frequency data, it is characterised in that: including multi-channel synchronous ADC mould
Number converter obtains module, analysis module, control module and processing module；
The acquisition module, for obtaining the capture setting information of each measuring point equipment, wherein the capture setting packet contains
M frequency is different and is FMaxThe sample frequency setting parameter and sampling number of/N, FMaxFor multi-channel synchronous ADC analog-digital converter
Highest sample frequency, M and N are respectively natural number；
The analysis module communicates to connect the acquiring unit, for analyzing the capture setting information of all measuring point equipment, determines
The longest sampling time；
The control module communicates to connect the analysis module and the multi-channel synchronous ADC analog-digital converter respectively, for
The longest sampling time is collection period T, controls the multi-channel synchronous ADC analog-digital converter periodically with highest sample frequency
FMaxDifferent data of the synchronous acquisition from each measuring point equipment；
The processing module communicates to connect the acquisition module and the control module respectively, for being directed to same collection period T
The different data of interior acquisition is arranged parameter according to one-to-one sample frequency and successively carries out at digital filtering processing and sampling
Reason obtains meeting the data slot that corresponding sample frequency requires.
6. a kind of device of multichannel synchronousing collection difference sample frequency data as claimed in claim 5, it is characterised in that: also
Including low-pass filter, wherein the low-pass filter is connected to the input terminal of the multi-channel synchronous ADC analog-digital converter,
For to it is to be collected and from the original signal of measuring point equipment carry out cutoff frequency be FMaxLow-pass filtering.
7. a kind of system of multichannel synchronousing collection difference sample frequency data, it is characterised in that: including multi-core processor, multi-pass
The synchronous ADC analog-digital converter in road and multiple measuring point equipment, wherein the multi-core processor include ARM nuclear unit, DSP core unit,
Multicore shared memory cell and the internal bus for communicating to connect these units, the ARM nuclear unit also communicate to connect described more
The output end of Channel Synchronous ADC analog-digital converter, the input terminal of the multi-channel synchronous ADC analog-digital converter are separately connected each
The measuring point equipment；
On the one hand the ARM nuclear unit is used to obtain the capture setting information of each measuring point equipment, and analyze all measuring point equipment
Capture setting information determines the longest sampling time, is on the other hand used for using the longest sampling time as collection period T, described in control
Multi-channel synchronous ADC analog-digital converter is periodically with highest sample frequency FMaxDifference of the synchronous acquisition from each measuring point equipment
Data, wherein the capture setting packet contains M frequency difference and is FMaxThe sample frequency setting parameter of/N and sampling
Points, FMaxFor the highest sample frequency of multi-channel synchronous ADC analog-digital converter, M and N are respectively natural number；
The multicore shared memory cell is used to be stored in all different data acquired in collection period T；
The DSP core unit is used for after receiving the period acquisition completion command from the ARM nuclear unit, total from the multicore
All different data for reading in storage unit and acquiring in same collection period T are enjoyed, then for acquisition in same collection period T
Different data, according to one-to-one sample frequency be arranged parameter successively carry out digital filtering processing and sample process, obtain
Meet the data slot that corresponding sample frequency requires.
8. a kind of system of multichannel synchronousing collection difference sample frequency data as claimed in claim 7, it is characterised in that:
Between the input terminal of the multi-channel synchronous ADC analog-digital converter and each measuring point equipment, it is also respectively provided with cutoff frequency
Rate is FMaxLow-pass filter, the low-pass filter is used for original signal to be collected and from corresponding measuring point equipment
It is filtered.
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| CN110632248A (en) * | 2019-08-29 | 2019-12-31 | 王飞 | Signal acquisition method for multidimensional titration analysis |
| CN111984628A (en) * | 2020-08-28 | 2020-11-24 | 北京人大金仓信息技术股份有限公司 | Database statistical information acquisition method, device, medium and electronic equipment |
| CN112179638A (en) * | 2020-09-28 | 2021-01-05 | 大连圣力来监测技术有限公司 | Multi-frequency resolution analysis method for synchronous sampling of rotating equipment |
| CN112230603A (en) * | 2020-10-14 | 2021-01-15 | 深圳吉兰丁智能科技有限公司 | Multi-sensor data acquisition method and system based on numerical control machine tool |
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