CN108319183B - A kind of multichannel analog amount acquisition device and method - Google Patents
A kind of multichannel analog amount acquisition device and method Download PDFInfo
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- CN108319183B CN108319183B CN201711375576.6A CN201711375576A CN108319183B CN 108319183 B CN108319183 B CN 108319183B CN 201711375576 A CN201711375576 A CN 201711375576A CN 108319183 B CN108319183 B CN 108319183B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Abstract
The invention discloses a kind of multichannel analog amount acquisition device and methods, are related to multichannel analog and measure examination card technique.Multichannel analog amount acquisition device disclosed by the invention includes at least modulus AD conversion module, further includes the multichannel analog amount analog input card being connected with AD conversion module, and the controller connecting with multichannel analog amount capture card；Wherein, multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel corresponds to different switching cycles, and switches to specified acquisition channel as current acquisition channel according to the control of controller；Controller, according to the different type of the analog signal of acquisition control multichannel analog amount analog input card, mutually switching is used as current acquisition channel in multiple acquisition channels.Technical scheme mainly realizes a possibility that being multiplexed in a variety of situations of analog quantity board, and then improves the multiplexing capacity of analog input card.
Description
Technical field
The present invention relates to multichannel analogs to measure examination card technique, and in particular to a kind of multichannel analog amount acquisition device and side
Method.
Background technique
What the signal in natural environment was all made of analog quantity, after digitizing analog quantity, in digital domain analysis
Technology be widely used in Modem simulation signal acquisition field.The sample rate or ampling channel number of traditional analog acquisition card
It is fixed.For number of channels mostly but sample rate is low or number of channels is few but is difficult to realize using the high environment of rate simultaneous
Hold.Analog acquisition card is limited in this way applied to a variety of sampling environment.
Summary of the invention
Provided herein is a kind of multichannel analog amount acquisition device and method, can solve existing single simulation amount capture card without
Method adapts to complicated sampling environment.
Disclosed herein is a kind of multichannel analog amount acquisition device, modulus AD conversion module is included at least, further includes and institute
State the connected multichannel analog amount analog input card of AD conversion module, and the control connecting with the multichannel analog amount capture card
Device；
Wherein, the multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel correspond to different
Switching cycle, and specified acquisition channel is switched to as current acquisition channel according to the control of controller；
The controller controls the multichannel analog amount analog input card according to the different type of the analog signal of acquisition and exists
Mutually switching is used as current acquisition channel in multiple acquisition channels.
Optionally, in above-mentioned apparatus, the multichannel analog amount analog input card includes a high-speed switch, the high-speed switch
Specified acquisition channel is connected as current acquisition channel according to controller instruction.
Optionally, in above-mentioned apparatus, the switching cycle of each acquisition channel and the switching frequency of the high-speed switch are inversely proportional.
Optionally, in above-mentioned apparatus, multiple acquisition channels on the multichannel analog amount analog input card share the AD
The sample rate of conversion module, the sample rate of each acquisition channel are directly proportional as the duration of current acquisition channel to it.
There is disclosed herein a kind of analogue quantity acquiring methods, comprising:
The analog signal of acquisition, according to the different type of the analog signal of acquisition, controls multi-pass after modulus AD conversion
Mutually switching is used as current acquisition channel to road analog acquisition board in multiple acquisition channels；
Wherein, each acquisition channel corresponds to different switching cycles on the multichannel analog amount analog input card.
Optionally, in the above method, the control multichannel analog amount analog input card is mutually cut in multiple acquisition channels
Change the operation as current acquisition channel, comprising:
The acquisition channel specified on the multichannel analog amount analog input card is connected as currently adopting using a high-speed switch
Collect channel.
Optionally, in the above method, the switching frequency of the switching cycle of the acquisition channel and the high-speed switch is at anti-
Than.
Optionally, in the above method, multiple acquisition channels on the multichannel analog amount analog input card share AD conversion
Sample rate, the sample rate of each acquisition channel is directly proportional as the duration of current acquisition channel to it.
There is disclosed herein a kind of multichannel analog amount acquisition device, include at least modulus AD conversion module, further include with
The connected multichannel analog amount analog input card of the AD conversion module, and the control being connect with the multichannel analog amount capture card
Device processed；
Wherein, the multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel correspond to different
Switching cycle, and specified acquisition channel is switched to as current acquisition channel according to the control of controller；
The controller, the controller include memory and processor, are stored with computer program on the memory,
Described program realizes all steps of above-mentioned analogue quantity acquiring method when being executed by the processor.
Optionally, in above-mentioned apparatus, the multichannel analog amount analog input card further includes a high-speed switch, and the high speed is opened
It closes and specified acquisition channel is connected as current acquisition channel according to controller instruction.
Technical scheme mainly realizes a possibility that being multiplexed in a variety of situations of analog quantity board, and then improves acquisition
The multiplexing capacity of board.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multichannel analog amount acquisition device in the embodiment of the present invention；
Fig. 2 is a kind of specific implementation schematic diagram of multichannel analog amount acquisition device in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment pair
Technical solution of the present invention is described in further detail.It should be noted that in the absence of conflict, embodiments herein and
Feature in embodiment can be arbitrarily combined with each other.
Embodiment 1
Present inventor proposes, can realize that sample rate and sampling channel flexibly change in turn using channel multiplexing technology
Realize a variety of sampling configurations, and flexible sampling configuration can be adapted for a plurality of types of analog acquisition environment.It is especially suitable
It is acquired in voltage mode analog signal.
Based on above-mentioned thought, the present embodiment provides a kind of multichannel analog amount acquisition devices, as shown in Figure 1, including at least
Mutually connected multichannel analog amount analog input card and controller.
Multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel correspond to different switching cycles,
It can be controlled according to controller and switch to specified acquisition channel as current acquisition channel；
Wherein, one end of channel analogy amount analog input card is connected with AD conversion module.
Controller controls multichannel analog amount analog input card in multiple acquisitions according to the different type of the analog signal of acquisition
Mutually switching is used as current acquisition channel in channel.
Multichannel analog amount analog input card may include a high-speed switch, which can instruct according to controller and connect
Lead to specified acquisition channel as current acquisition channel.
Herein, the switching cycle of each acquisition channel and the switching frequency of high-speed switch are inversely proportional.Acquisition channel herein
Switching cycle refer to the handoff procedure of the acquisition channel occupied time.
It should also be noted that controller is according to the type (such as square-wave signal etc.) of the analog signal of acquisition in above-mentioned apparatus
Difference selects different acquisition channels, is because the corresponding acquisition of different types of analog signal requires difference.For example, inhomogeneity
The corresponding frequency acquisition of the analog signal of type is different, and each acquisition channel has been pre-configured with different switching weeks in the present embodiment
Phase can satisfy different acquisition requirements, for example, requiring lower analog signal for frequency acquisition, can choose switching cycle
Biggish acquisition channel is as current acquisition channel.It, then can be with conversely, for the more demanding analog signal of frequency acquisition
The acquisition channel for selecting switching cycle small is as current acquisition channel.
In addition, multiple acquisition channels on multichannel analog amount analog input card share the sample rate of AD conversion module, each
The sample rate of acquisition channel is directly proportional as the duration of current acquisition channel to it.
With reference to the accompanying drawing and practical application, illustrate a kind of specific embodiment party of above-mentioned multichannel analog amount acquisition device
Formula.
As shown in Fig. 2, the sample rate for the AD conversion module connecting with multichannel analog amount acquisition device is 40Mbps, branch
Hold single channel analog acquisition.Multichannel analog amount analog input card includes 4 acquisition channels, can be by high-speed switch 4
Mutually switch between a acquisition channel, i.e., 4 channels can share 40Mbps sample rate.Therefore, by controller to switch
Control, each acquisition channel can realize variation of the sample rate from 0~40Mbps, to realize that multichannel analog amount data are adopted
Collection.
In addition, the multichannel analog amount acquisition realized in the present embodiment, can better adapt to acquisition environment.The multichannel
Analog acquisition device can carry out low sampling rate signal acquisition to multichannel analog signals simultaneously, and then carry out coarseness analysis,
High sampling rate mode is switched to i.e. by the acquisition channel of multichannel analog amount acquisition device for the signal for needing fine granularity to analyze
Fine granularity analysis can be achieved.
For example, when switch Key is when Key1 stops 250ms, the sample rate of analog acquisition passage becomes with 1 second for the period
For 250ms/1s*40Mbps=10Mbps.It is possible thereby to calculate, it is assumed that key1 is closed 750ms, and Key2 is closed 250ms, then
The sample rate of analog acquisition passage 1 is 750ms/1s*40Mbps=30Mbps, 2 sample rate of analog acquisition passage are as follows:
250ms/1s*40Mbps=10Mbps.Namely the closing time by controlling each switch realizes the control of sample rate.
In above-mentioned apparatus, in order to realize accurately Switch Control, high speed COMS bus exchange switch can be used, because of AD core
It is 25ns that the sample rate of piece, which is 40Mbps namely sampling period,.It is achieved that the control resolution ratio of switching (can also claim
For the switching frequency of high-speed switch) it is less than 25ns.
Embodiment 2
The present embodiment provides a kind of analogue quantity acquiring methods, comprising:
The analog signal of acquisition, according to the different type of the analog signal of acquisition, controls multi-pass after modulus AD conversion
Mutually switching is used as current acquisition channel to road analog acquisition board in multiple acquisition channels；
Wherein, each acquisition channel corresponds to different switching cycles on the multichannel analog amount analog input card.Above-mentioned side
In method, according to the different type of the analog signal of acquisition, multichannel analog amount analog input card phase in multiple acquisition channels is controlled
Mutually switching is allowed for as current acquisition channel, and the corresponding acquisition of different types of analog signal (such as square-wave signal etc.) is wanted
Ask different.For example, the corresponding frequency acquisition of different types of analog signal is different, and each acquisition channel is preparatory in the present embodiment
Being configured with different switching cycles can satisfy different acquisition requirements, for example, requiring lower simulation to believe frequency acquisition
Number, it can choose the biggish acquisition channel of switching cycle as current acquisition channel.Conversely, for frequency acquisition require compared with
High analog signal then can choose the small acquisition channel of switching cycle as current acquisition channel.Specifically, multiple acquisitions are logical
Mutual switching between road can use high-speed switch realization, i.e., connects multichannel analog amount collection plate by control high-speed switch
The acquisition channel specified on card is as current acquisition channel.
Wherein, the switching cycle of acquisition channel and the switching frequency of high-speed switch are inversely proportional, and as acquisition channel configures
Switching cycle is bigger, then the switching frequency of the high-speed switch of the corresponding configuration of the acquisition channel is smaller (it is also contemplated that high-speed switch
Switching rate is small).Vice versa.And the switching cycle for the acquisition channel being referred to herein refers to shared by the handoff procedure of acquisition channel
Time.
It is also noted that multiple acquisition channels on multichannel analog amount analog input card can share the sampling of AD conversion
Rate, in this way, the sample rate of each acquisition channel is directly proportional as the duration of current acquisition channel to it.Gate a certain acquisition
When channel is current acquisition channel, residence time is longer on this acquisition channel, and sample rate is higher.
Embodiment 3
The present embodiment provides a kind of multichannel analog amount acquisition devices, include at least AD conversion module, further include turning with AD
Change the mold the connected multichannel analog amount analog input card of block, and the controller connecting with multichannel analog amount capture card.
Multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel correspond to different switching cycles,
And specified acquisition channel is switched to as current acquisition channel according to the control of controller；
Controller, including memory and processor are stored with computer program on memory, and program is held by the processor
All steps of the described method of above-described embodiment 2 are realized when row.
Specifically, multichannel analog amount analog input card may include a high-speed switch, which can be according to control
Device instruction connects specified acquisition channel as current acquisition channel.
Device provided in this embodiment can realize that the institute of the device of above-described embodiment 1 is functional, and embodiment 2 also can be implemented
Method, therefore other concrete operations of the device can be found in the corresponding contents of above-described embodiment 1 and embodiment 2, no longer superfluous herein
It states.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, one or more integrated circuits can be used also to realize in all or part of the steps of above-described embodiment.Accordingly
Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module
Formula is realized.The application is not limited to the combination of the hardware and software of any particular form.
The above, preferred embodiments only of the invention, is not intended to limit the scope of the present invention.It is all this
Within the spirit and principle of invention, any modification, equivalent substitution, improvement and etc. done should be included in protection model of the invention
Within enclosing.
Claims (10)
1. a kind of multichannel analog amount acquisition device, include at least modulus AD conversion module, which is characterized in that further include with it is described
The connected multichannel analog amount analog input card of AD conversion module, and the control being connect with the multichannel analog amount analog input card
Device；
Wherein, the multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel are pre-configured with different
Switching cycle, and specified acquisition channel is switched to as current acquisition channel according to the control of controller, acquisition channel is cut
Changing the period refers to the handoff procedure of the acquisition channel occupied time；
The controller, the requirement according to the analog signal of acquisition to frequency acquisition control the multichannel analog amount analog input card
Switching cycle is selected to meet the acquisition channel of requirement of the analog signal of the acquisition to frequency acquisition in multiple acquisition channels
As current acquisition channel.
2. device as described in claim 1, which is characterized in that
The multichannel analog amount analog input card includes a high-speed switch, and the high-speed switch is connected specified according to controller instruction
Acquisition channel as current acquisition channel.
3. device as claimed in claim 2, which is characterized in that
The switching cycle of each acquisition channel and the switching frequency of the high-speed switch are inversely proportional.
4. device as claimed in claim 1,2 or 3, which is characterized in that
Multiple acquisition channels on the multichannel analog amount analog input card share the sample rate of the AD conversion module, each adopt
The sample rate for collecting channel is directly proportional as the duration of current acquisition channel to it.
5. a kind of analogue quantity acquiring method, comprising:
The analog signal of acquisition is after modulus AD conversion, requirement according to the analog signal of acquisition to frequency acquisition, controls more
Channel analogy amount analog input card selects switching cycle to meet the analog signal of the acquisition to acquisition frequency in multiple acquisition channels
The acquisition channel of the requirement of rate is as current acquisition channel；
Wherein, each acquisition channel is pre-configured with different switching cycles on the multichannel analog amount analog input card, and acquisition is logical
The switching cycle in road refers to the handoff procedure of the acquisition channel occupied time.
6. method as claimed in claim 5, which is characterized in that the control multichannel analog amount analog input card is in multiple acquisitions
Mutually operation of the switching as current acquisition channel in channel, comprising:
It is logical as current acquisition that the acquisition channel specified on the multichannel analog amount analog input card is connected using a high-speed switch
Road.
7. method as claimed in claim 6, which is characterized in that
The switching cycle of the acquisition channel and the switching frequency of the high-speed switch are inversely proportional.
8. the method as described in claim 5,6 or 7, which is characterized in that
Multiple acquisition channels on the multichannel analog amount analog input card share the sample rate of AD conversion, each acquisition channel
Sample rate is directly proportional as the duration of current acquisition channel to it.
9. a kind of multichannel analog amount acquisition device, include at least modulus AD conversion module, which is characterized in that further include with it is described
The connected multichannel analog amount analog input card of AD conversion module, and the control being connect with the multichannel analog amount analog input card
Device；
Wherein, the multichannel analog amount analog input card, including multiple acquisition channels, each acquisition channel are pre-configured with different
Switching cycle, and specified acquisition channel is switched to as current acquisition channel according to the control of controller；
The controller, the controller include memory and processor, and computer program is stored on the memory, described
The step of any one of claim 5 to 8 the method is realized when program is executed by the processor.
10. device as claimed in claim 9, which is characterized in that
The multichannel analog amount analog input card further includes a high-speed switch, and the high-speed switch is connected according to controller instruction to be referred to
Fixed acquisition channel is as current acquisition channel.
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| CN112033451A (en) * | 2020-08-03 | 2020-12-04 | 珠海格力电器股份有限公司 | Measuring device and method of encoder and encoder |
| CN113055012A (en) * | 2021-03-05 | 2021-06-29 | Tcl空调器(中山)有限公司 | AD sampling method, device and storage medium |
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| RU2658569C2 (en) * | 2016-10-12 | 2018-06-21 | Общество с ограниченной ответственностью "Научно-Технический Центр Завод Балансировочных машин" | Multi-channel device for data collection with accelerometers |
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