CN108107773A - A kind of multichannel data acquisition system - Google Patents
A kind of multichannel data acquisition system Download PDFInfo
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- CN108107773A CN108107773A CN201711174833.XA CN201711174833A CN108107773A CN 108107773 A CN108107773 A CN 108107773A CN 201711174833 A CN201711174833 A CN 201711174833A CN 108107773 A CN108107773 A CN 108107773A
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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
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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Abstract
The present invention provides a kind of multichannel data acquisition systems.It includes：Power supply；M group sensor chips, every group of sensor chip are made of N number of sensor unit；And data acquisition module, including：At least N number of passage, at least M input port, each input port can connect to break-make corresponding one group of sensor chip；At least N number of output port, each output port is connected with a passage at least N number of passage, and can connect ground wire to break-make；Wherein, at least N number of output port is configured to allow for connecting ground wire simultaneously, when being connected with an input port wherein with corresponding one group of sensor chip, while obtains the data of this group of N number of sensor unit of sensor core on piece；Or at least N number of output port is configured to that wherein one or more output ports is selected to connect ground wire, when being connected with an input port wherein with corresponding one group of sensor chip, obtains the data of the corresponding one or more sensors unit of this group of sensor core on piece.
Description
Technical field
The present invention relates to electronic information communication technical field, more particularly to a kind of multichannel data acquisition system.
Background technology
Distributed test system containing a large amount of test terminals has a wide range of applications in the industrial production, wherein, it is mostly logical
The analog signal that track data is gathered with the task of test system is acquisition sensor output is converted into the number that computer can identify
Word signal, and be sent to computer, the operations such as computer can be shown or be converted to obtained data.
At present, the number of channels of data collecting card is limited, when needing to carry out data acquisition to large batch of sensor, leads to
It is often after the data of a collection of sensor have been gathered, then changes a collection of sensor and carry out data acquisition, and so on, until acquisition
The data of complete all sensors.Obviously, the mode of this gathered data is less efficient, in order to solve the above-mentioned technical problem, existing
Technology be mostly by being improved to extend its passage to data collecting card itself.However, by largely investigating discovery,
Although the number of channels of data collecting card increased, but increasing number of channels will cause cost drastically to raise, and work as
It after number of channels reaches certain numerical value, is further added by just extremely difficult, is primarily limited to the pressure voltage of input port, input signal
Range, the impedance of simulation input, resolution ratio and gain factor etc..It although in addition, can be with by being improved to capture card itself
Its passage is extended, but when in face of large quantities of quantity sensors, still just can not can be completed disposably or using less number pair
The data acquisition of large quantities of quantity sensors.
The content of the invention
It is few that one object of the present invention will solve data acquisition module number of channels of the prior art, can not realize arbitrary
The technical issues of passage extends.
A further object of the invention is to solve individual data acquisition module gathered data of the prior art
Efficiency it is low the technical issues of.
Another of the present invention is further objective is that the easy crosstalk of signal in test circuit of the prior art will be solved
The technical issues of.
The present invention provides a kind of multichannel data acquisition system, including：
Power supply；
M group sensor chips, every group of sensor chip are made of N number of sensor unit；With
Data acquisition module, including：
At least N number of passage, N number of passage are corresponding with N number of sensor unit respectively；
At least M input port, each input port are connected at least N number of passage, the M inputs
Port is corresponding with the M groups sensor chip respectively, and each input port can break-make in the M input ports
Ground connects corresponding one group of sensor chip；With
At least N number of output port, N number of output port is corresponding with N number of sensor unit respectively, each described
Output port is connected with a passage at least N number of passage, and can connect ground wire to break-make；
Wherein, the power configuration connects into an input port wherein with sensor chip described in corresponding one group
It when logical, powers to this group of sensor chip, and into permission, selectively one group of sensor chip supplies the power configuration thereto
Electricity；
Wherein, at least N number of output port is configured to allow for connecting the ground wire simultaneously, described defeated with one wherein
When inbound port is connected with sensor chip described in corresponding one group, while obtain N number of sensor described in this group of sensor core on piece
The data of unit；Alternatively, at least N number of output port is configured to select wherein one or more described output port connection institutes
Ground wire is stated, when being connected with an input port wherein with sensor chip described in corresponding one group, obtains group sensing
The data of corresponding one or more sensors unit on device chip.
Optionally, the quantity of the data acquisition module is one.
Optionally, the multichannel data acquisition system further includes：
At least M relay, the M relays are corresponding with the M groups sensor chip respectively, and each relay can
Selectively it is connected with the power supply；With
First analog switch, for selecting a relay from at least M relay, so that the relay and institute
Power supply connection is stated, so that the power supply is powered to one group of sensor chip corresponding with the relay.
Optionally, the multichannel data acquisition system further includes：
Second analog switch, for selecting an output port from least N number of output port, so that the output terminal
Mouth connects the ground wire.
Optionally, the multichannel data acquisition system further includes：
At least N number of fixed load, N number of fixed load is corresponding with N number of output port respectively, each described solid
One end of fixed load connects the ground wire, an output port at least N number of output port described in other end connection, so that institute
State the voltage value at the data collecting module collected fixed load.
Optionally, the data acquisition module is configured to obtain corresponding sensing according to the voltage value at each fixed load
The resistance value of device unit.
Optionally, the multichannel data acquisition system further includes：
At least M diode, the M diodes are corresponding with the M groups sensor chip respectively, each two pole
It manages equal one end with one of input port of the data acquisition module to be connected, the other end and the M groups sensor chip
In one group of sensor chip be connected.
Optionally, the power configuration into do not allow simultaneously to the M groups sensor chip power.
Optionally, the power configuration is passed into the one of which only allowed selectively into the M groups sensor chip
Sensor chip power supply.
Scheme according to the present invention, the data collecting system are to extend at least N number of passage of individual data acquisition module
It is at least M*N passage.It is that 16 passages of individual data acquisition module are expanded to 256 in above-mentioned specific embodiment
A passage.By the control of the first analog switch and the second analog switch, the extension of multiple passages can be realized, it might even be possible to real
The extension of incumbent meaning passage, it is possible thereby to improve the efficiency of data acquisition, and greatly reduces cost.This is because it need not pass through
Hardware device realizes the extension of passage, that is, multiple data acquisition modules is not required to carry out extended channel, it is only necessary to which individual data is adopted
The extension of a large amount of passages can be realized in collection module, realizes the efficient data acquisition of high-volume sensor chip, this is to existing
There is technology to be made that huge contribution.
In addition, when carrying out the data acquisition of all sensors chip, all the sensors chip can be placed on same
On substrate, when having gathered the data of one group of sensor chip, sensor chip need not be replaced manually, but directly passes through
The data for controlling to gather other groups of sensor chips of one analog switch and the second analog switch.In addition, gathering every group of biography
During data on each sensor unit of sensor chip, pending data starts to gather after stablizing, and can improve data acquisition module
Gathered data at different moments accuracy.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Description of the drawings
Some specific embodiments of detailed description of the present invention by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference numeral denotes same or similar component or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing：
Fig. 1 is the schematic block diagram of multichannel data acquisition system according to an embodiment of the invention；
Fig. 2 is the schematic block diagram of data acquisition module according to an embodiment of the invention；
Fig. 3 is the schematic block diagram of the first analog switch according to an embodiment of the invention；
Fig. 4 is the schematic block diagram of 16 relays according to an embodiment of the invention；
Fig. 5 is the schematic block diagram of power supply according to an embodiment of the invention.
Specific embodiment
Fig. 1 shows the schematic block diagram of multichannel data acquisition system according to an embodiment of the invention.Such as Fig. 1
Shown, which can include power supply, M groups sensor chip and data acquisition module.Every group of sensor
Chip is made of N number of sensor unit.Data acquisition module includes at least N number of passage, at least M input port and at least N number of
Output port.N number of passage is corresponding with N number of sensor unit respectively, and each input port is connected at least N number of passage, M
A input port is corresponding with M group sensor chips respectively, and each input port can connect to break-make in M input port
Corresponding one group of sensor chip.N number of output port is corresponding with N number of sensor unit respectively, each output port with extremely
A passage in few N number of passage is connected, and can connect ground wire to break-make.Power configuration into input port wherein with
It during the connection of corresponding one group of sensor chip, powers to this group of sensor chip, and power configuration is into allowing selectively to it
In the power supply of one group of sensor chip.Wherein, at least N number of output port is configured to allow for connecting ground wire simultaneously, with one wherein
When input port is connected with corresponding one group of sensor chip, while obtain this group of N number of sensor unit of sensor core on piece
Data；Alternatively, at least N number of output port is configured to that wherein one or more output ports is selected to connect ground wire, with wherein one
When a input port is connected with corresponding one group of sensor chip, the corresponding one or more biographies of this group of sensor core on piece are obtained
The data of sensor cell.Wherein, M and N is the positive integer more than zero.Wherein, data acquisition module for example can be to carry to patrol
Collect the MCU or data collecting card of control.
In one embodiment, M and N is 16.I.e. the multichannel data acquisition system includes 16 groups of sensor cores
Piece, P1 as shown in Figure 1 to P16.Every group of sensor chip is made of 16 sensor units, SENSOR1 as shown in Figure 1
To SENSOR16.16 sensor units are arranged in this group of sensor core on piece in array fashion.16 groups of sensings
Device chip is arranged in array fashion.In one embodiment, every group of sensor chip is all connected with a diode, this two
Pole pipe one end connects one group of sensor chip, and the other end connects one of input port of data acquisition module.Diode
Quantity is 16, as shown in fig. 1 D1 to D16.Since diode can carry out one-way conduction to the signal on circuit,
The crosstalk of Acquisition Circuit signal can be prevented by diode during gathered data.
In one embodiment, a data acquisition module can include 16 passages, 16 input ports and ten
Six output ports.Wherein, as shown in Figure 1,16 input ports are AD1 to AD16 respectively.The multi-channel data acquisition system
System further includes at least N number of fixed load, such as can be 16 fixed loads, but not limited to this.The one of each fixed load
End connection ground wire, the other end connect an output port at least N number of output port so that data collecting module collected this fix
Voltage value at load.The data that i.e. data collecting module collected obtains are the voltage value at fixed load, pass through Ohm's law
Release the resistance value of corresponding sensor unit.
Fig. 2 shows the schematic block diagram of data acquisition module according to an embodiment of the invention.As shown in Fig. 2,
On the data acquisition module there are 16 passages, be AD1 to AD16 respectively.Also there are two logics for tool on the data acquisition module
Control port, one of logic control port are CRL1 (0:3), another logic control port is CRL2 (0:3).
Fig. 3 shows the schematic block diagram of the first analog switch according to an embodiment of the invention.As shown in figure 3,
First analog switch U3 have multiple signaling interfaces, the quantity of signaling interface is at least consistent with the group number of sensor chip, with
Sensor chip is corresponding, is, for example, 16 signaling interfaces, is I0 to I15 respectively.Each signaling interface one end connection corresponds to
Relay interface I (0:15), the other end connects one of logic control port CRL1 (0:3).
Fig. 4 shows the schematic block diagram of 16 relays according to an embodiment of the invention.Fig. 5 shows root
According to the schematic block diagram of the power supply of one embodiment of the invention.According to Fig. 4 and Fig. 5, which connects respectively
Connect 16 signaling interfaces of the first analog switch U3, to be controlled by the first analog switch U3, and each relay with
Power supply is connected.When a signaling interface of the first analog switch connects a corresponding relay, power supply to this
The corresponding sensor chip power supply of signaling interface.
Referring to Fig. 1, which further includes the second analog switch U4.Second analog switch U4 can be wrapped
Multiple signaling interfaces are included, the quantity of signaling interface is at least consistent with the quantity of sensor unit, with corresponding with sensor unit,
For example, 16 signaling interfaces are I0 to I15 respectively.Each signaling interface one end connection ground wire in second analog switch,
The other end connects another logic control port CRL2 (0:3).When a signaling interface in second analog switch connects ground wire,
The data of corresponding sensor unit in corresponding one group of sensor chip can be obtained.All signals in second analog switch
When interface is turned on ground wire, the data of all the sensors unit in corresponding one group of sensor chip can be obtained.
It is illustrated referring to Fig. 1, in one embodiment, if desired obtains first on first group of sensor chip P1
The data of sensor unit SENSOR1 then pass through first input port of the first analog switch gated data-acquisition module
AD1, to be powered to first group of sensor chip P1, other groups of sensor chips no power, then pass through the second simulation at this time
First output port of switching gate data acquisition module to connect the first of data acquisition module passage, thus gathers
The voltage value of first fixed load, and it is inferred to according to Ohm's law first on corresponding first group of sensor chip P1
The resistance value of sensor unit SENSOR1.
If desired the data of the 3rd sensor unit SENSOR19 on second group sensor chip P2 are obtained, then are passed through
Second input port AD2 of the first analog switch gated data-acquisition module, to be supplied to second group sensor chip P2
Electricity, other groups of sensor chips no power, then the 3rd output for passing through the second analog switch gated data-acquisition module at this time
Port to connect the 3rd of data acquisition module the passage, thus gathers the voltage value of the 3rd fixed load, and according to ohm
Law is inferred to the resistance value of the 3rd sensor unit SENSOR19 on corresponding second group sensor chip P2.
If desired the first sensor unit SENSOR33 and second sensing on the 3rd group of sensor chip P3 are obtained
The data of device cell S ENSOR34, then by the 3rd input port AD3 of the first analog switch gated data-acquisition module, with
It is powered to the 3rd group of sensor chip, other groups of sensor chips no power, then gated by the second analog switch at this time
First output port and second output port of data acquisition module, with connect the first of data acquisition module passage and
Second passage, thus gathers the voltage value of first fixed load and second fixed load, and is inferred according to Ohm's law
Go out the first sensor unit SENSOR33 and second sensor unit on corresponding 3rd group of sensor chip P3
The resistance value of SENSOR34.
When carrying out the data acquisition of all sensors chip, all the sensors chip can be placed on to same substrate
On, when having gathered the data of one group of sensor chip, sensor chip need not be replaced manually, but directly passes through the first mould
Intend the control of switch and the second analog switch to gather the data of other groups of sensor chips.In addition, gathering every group of sensor
During data on each sensor unit of chip, pending data starts to gather after stablizing, and can improve data acquisition module not
The accuracy of gathered data in the same time.
In other embodiments, M and N can also be other numerical value such as 18,20, and the numerical value of M and N can not
It is equal.The quantity of data acquisition module is one.
According to the solutions of the embodiments of the present invention, which is by at least N number of logical of individual data acquisition module
Road expands at least M*N passage.It is to extend 16 passages of individual data acquisition module in above-mentioned specific embodiment
For 256 passages.By the control of the first analog switch and the second analog switch, the extension of multiple passages can be realized, even
It can realize the extension of arbitrary passage, it is possible thereby to improve the efficiency of data acquisition, and greatly reduce cost.This is because it is not required to
The extension of passage is realized by hardware device, that is, multiple data acquisition modules is not required to carry out extended channel, it is only necessary to single
The extension of a large amount of passages can be realized in data acquisition module, realizes the efficient data acquisition of high-volume sensor chip,
This is made that the prior art huge contribution.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers other all these variations or modifications.
Claims (9)
1. a kind of multichannel data acquisition system, which is characterized in that including：
Power supply；
M group sensor chips, every group of sensor chip are made of N number of sensor unit；With
Data acquisition module, including：
At least N number of passage, N number of passage are corresponding with N number of sensor unit respectively；
At least M input port, each input port are connected at least N number of passage, the M input ports
It is corresponding with the M groups sensor chip respectively, and each input port can connect to break-make in the M input ports
Connect corresponding one group of sensor chip；With
At least N number of output port, N number of output port is corresponding with N number of sensor unit respectively, each output
Port is connected with a passage at least N number of passage, and can connect ground wire to break-make；
Wherein, the power configuration is connected into an input port wherein with sensor chip described in corresponding one group
When, it powers to this group of sensor chip, and the power configuration into permission, selectively power thereto by one group of sensor chip；
Wherein, at least N number of output port is configured to allow for connecting the ground wire simultaneously, with an input terminal wherein
When mouth is connected with sensor chip described in corresponding one group, while obtain N number of sensor unit described in this group of sensor core on piece
Data；Alternatively, at least N number of output port is configured to select wherein one or more described output port connections describedly
Line when being connected with an input port wherein with sensor chip described in corresponding one group, obtains this group of sensor core
The data of the corresponding one or more sensors unit of on piece.
2. multichannel data acquisition system according to claim 1, which is characterized in that the quantity of the data acquisition module
For one.
3. multichannel data acquisition system according to claim 1, which is characterized in that further include：
At least M relay, the M relays are corresponding with the M groups sensor chip respectively, and each relay may be selected
Ground is connected with the power supply；With
First analog switch, for selecting a relay from at least M relay, so that the relay and the electricity
Source connects, so that the power supply is powered to one group of sensor chip corresponding with the relay.
4. multichannel data acquisition system according to claim 3, which is characterized in that further include：
Second analog switch, for selecting an output port from least N number of output port, so that the output port connects
Connect the ground wire.
5. according to the multichannel data acquisition system any one of claim 1-4, which is characterized in that further include：
At least N number of fixed load, N number of fixed load is corresponding with N number of output port respectively, and each fixation is born
One end of load connects the ground wire, an output port at least N number of output port described in other end connection, so that the number
The voltage value at the fixed load is gathered according to acquisition module.
6. multichannel data acquisition system according to claim 5, which is characterized in that the data acquisition module is configured to
The resistance value of corresponding sensor unit is obtained according to the voltage value at each fixed load.
7. according to the multichannel data acquisition system any one of claim 1-4, which is characterized in that further include：
At least M diode, the M diodes are corresponding with the M groups sensor chip respectively, and each diode is equal
One end is connected with one of input port of the data acquisition module, in the other end and the M groups sensor chip
One group of sensor chip is connected.
8. according to the multichannel data acquisition system any one of claim 1-4, which is characterized in that the power configuration
Into do not allow simultaneously to the M groups sensor chip power.
9. multichannel data acquisition system according to claim 8, which is characterized in that the power configuration is into only permission can
One of which sensor chip power supply selectively into the M groups sensor chip.
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| CN201711174833.XA CN108107773B (en) | 2017-11-22 | 2017-11-22 | Multichannel data acquisition system |
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| CN201711174833.XA CN108107773B (en) | 2017-11-22 | 2017-11-22 | Multichannel data acquisition system |
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Cited By (3)
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| CN108802528A (en) * | 2018-06-11 | 2018-11-13 | 中国水利水电科学研究院 | A kind of channel measurement device and method |
| CN109783437A (en) * | 2019-01-28 | 2019-05-21 | 北京经纬恒润科技有限公司 | A kind of control method and device of chip |
| CN113110247A (en) * | 2021-05-18 | 2021-07-13 | 中国地震局地球物理研究所 | Multichannel data acquisition control circuit |
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| CN108107773B (en) | 2020-01-14 |
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