CN209400679U - Analog acquisition card - Google Patents
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- CN209400679U CN209400679U CN201822238340.4U CN201822238340U CN209400679U CN 209400679 U CN209400679 U CN 209400679U CN 201822238340 U CN201822238340 U CN 201822238340U CN 209400679 U CN209400679 U CN 209400679U
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- 230000008878 coupling Effects 0.000 claims abstract description 32
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- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 230000001012 protector Effects 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000003745 diagnosis Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
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- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
It includes microprocessor, optical coupling isolator, analog quantity acquisition circuit and power sense circuit that the utility model embodiment, which provides a kind of analog acquisition card and fault detection method, the analog acquisition card,；Wherein, the analog quantity acquisition circuit and the power sense circuit are connect with one end of the optical coupling isolator respectively, and the microprocessor is connect with the other end of the optical coupling isolator.The utility model can be realized fault diagnosis during analog acquisition, improve the reliability of data acquisition, reduce the human cost in data acquisition.
Description
Technical field
The utility model relates to test technique automatic fields, in particular to a kind of analog acquisition card.
Background technique
In current self-reacting device and instrument industry, the simulation at live end is usually realized by analogue collection module
Amount acquisition, but existing analog acquisition card cannot achieve the automatic diagnosis of failure, or one during analog acquisition
Denier failure then needs manually to be checked, judge, so as to cause the increase of data acquisition cost, reliability is reduced.
Utility model content
The utility model is intended to improve above-mentioned technical problem.For this purpose, the utility model provides a kind of analog acquisition card,
To realize the fault diagnosis during analog acquisition, data acquisition cost is reduced.
On the one hand, the utility model preferred embodiment provides a kind of analog acquisition card, and the analog acquisition card includes:
The analog quantity acquisition circuit being acquired for the analog quantity to live end；
The power sense circuit that power supply status is detected is carried out for the power supply to live end；
For realizing the optical coupling isolator of the Phototube Coupling with system end；
Data acquisition is carried out for controlling analog quantity acquisition circuit, and is acquired concurrently according to the analog quantity acquisition circuit
The data sent whether there is the microprocessor of failure to diagnose the analog quantity acquisition circuit；
Wherein, the analog quantity acquisition circuit and the power sense circuit connect with one end of the optical coupling isolator respectively
It connects, the microprocessor is connect with the other end of the optical coupling isolator.
In the selection of the utility model preferred embodiment, the analog quantity acquisition circuit includes analog-digital converter and multiple
Two-wire system sensor, the input terminal of the analog-digital converter and the multiple two-wire system sensor be separately connected, output end
It is connect with the optical coupling isolator.
In the selection of the utility model preferred embodiment, the analog quantity acquisition circuit further includes and each two-wire system
Multiple current-limiting protection circuits, the input terminal of the current-limiting protection circuit and the two-wire system sensor connect sensor correspondingly
It connects, output end is connect with the analog-digital converter.
In the selection of the utility model preferred embodiment, the current-limiting protection circuit include first resistor, second resistance,
Diode, the first protector and the second protector；
One end external power supply, the other end of first protector are connect with the input terminal of the diode, two pole
The output end of pipe is connect with one end of the two-wire system sensor；One end of the first resistor and the two-wire system sensor
The other end, second protector one end be separately connected, the other end is connect with the input terminal of the analog-digital converter, described
The other ends of two protectors is grounded, and one end of the second resistance connect with the input terminal of the analog-digital converter, another termination
Ground.
In the selection of the utility model preferred embodiment, first protector includes fuse, second protection
Device includes TVS pipe.
In the selection of the utility model preferred embodiment, the power sense circuit includes 3rd resistor and the 4th electricity
Resistance, one end of the 3rd resistor is connect with one end of the 4th resistance, and the input terminal of the optical coupling isolator is connected to
Between the 3rd resistor and the 4th resistance.
In the selection of the utility model preferred embodiment, lead between the microprocessor and the analog quantity acquisition circuit
Cross the connection of SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) bus.
In the selection of the utility model preferred embodiment, the analog acquisition card further includes EEPROM
(Electrically Erasable Programmable read only memory, band electric erazable programmable read-write storage
Device), the EEPROM is connect with the controller in the microprocessor.
In the selection of the utility model preferred embodiment, IIC is used between the EEPROM and the controller
The connection of (Inter-Integrated Circuit, integrated circuit) bus.
On the other hand, the utility model preferred embodiment also provides a kind of fault detection method, described in above-mentioned
Analog acquisition card, the fault detection method:
The analog quantity information at analog quantity acquisition circuit collection site end is simultaneously converted to after electric signal through the optocoupler
Isolator is sent to the microprocessor；
The microprocessor will receive the electric signal and be compared with preset value, judge that the size of the electric signal is
No to meet needs, if not satisfied, then determining the analog quantity acquisition circuit, there are failures.
Compared with prior art, the utility model provides a kind of analog acquisition card, wherein by analog acquisition
The ingehious design of card can either realize the acquisition to in-site modeling amount, can also be achieved failure during analog acquisition and examine
It is disconnected, the reliability of data acquisition is improved, the human cost in data acquisition is reduced.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram for the analog acquisition card that the utility model preferred embodiment provides.
Fig. 2 is another structural schematic diagram for the analog acquisition card that the utility model preferred embodiment provides.
Fig. 3 is the structural schematic diagram of current protecting circuit shown in Fig. 2.
Fig. 4 is the electrical block diagram of power sense circuit shown in Fig. 1.
Fig. 5 is the flow diagram for the fault detection method that the utility model preferred embodiment provides.
Icon: 10- analog acquisition card；11- microprocessor；13- optical coupling isolator；14- analog quantity acquisition circuit；140-
Analog-digital converter；141- two-wire system sensor；142- current-limiting protection circuit；The first protector of 143-；The second protector of 144-；
R1- first resistor；R2- second resistance；D- diode；15- power sense circuit；R3- 3rd resistor；The 4th resistance of R4-.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below
The range of claimed invention, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile it is practical new at this
In the description of type unless specifically defined or limited otherwise, term " installation ", " setting ", " connection " shall be understood in a broad sense, example
Such as, it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to be electrically connected
It connects；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As shown in Figure 1, being the frame structure schematic diagram of analog acquisition card 10 provided by the embodiment of the utility model, the mould
Analog quantity capture card 10 includes microprocessor 11, optical coupling isolator 13, analog quantity acquisition circuit 14 and power sense circuit 15；Its
In, the analog quantity acquisition circuit and the power sense circuit are connect with one end of the optical coupling isolator respectively, described micro-
Processor is connect with the other end of the optical coupling isolator.
The present embodiment can not only realize the simulation to live end by the ingehious design to above-mentioned analog acquisition card 10
The acquisition of amount can also be achieved fault detection during analog acquisition, it is ensured that the reliability of data acquisition reduces data and adopts
Collect cost.It should be noted herein that the live end mentioned in the utility model embodiment refers on the right side of optical coupling isolator
Analog quantity acquisition circuit 14 and power sense circuit 15 etc., system end refers to carries out data processing on the left of optical coupling isolator 13
Microprocessor 11 of diagnosis etc..
Further, in the present embodiment, the analog quantity acquisition circuit 14 is for realizing the analog signal to live end
Acquisition, please refer to Fig. 2, the analog quantity acquisition circuit 14 may include that analog-digital converter 140 and multiple two-wire systems pass
Sensor 141, the input terminal of the analog-digital converter 140 and the multiple two-wire system sensor 141 be separately connected, output end
It is connect with the optical coupling isolator 13.Wherein, the two-wire system sensor 141 is for realizing the acquisition to in-site modeling amount, together
When electric energy can also directly itself be provided using the signal of 4~20mA, in the present embodiment, the two-wire system sensor 141 can be with
Including but not limited to temperature sensor, humidity sensor etc..In actual analog acquisition, the microprocessor 11 can be passed through
Each two-wire system sensor of control institute is acquired.
In addition, the analog-digital converter 140 is used to carry out modulus to the analog quantity that each two-wire system sensor 141 acquires
Conversion, and the electric signal after conversion is sent to the microprocessor 11.
Further, the analog quantity acquisition circuit 14 may also include corresponds with each two-wire system sensor 141
Current-limiting protection circuit 142, the input terminal of each current-limiting protection circuit 142 connect with the two-wire system sensor 141, exports
End is connect with the analog-digital converter 140.The current-limiting protection circuit is for realizing to 10 internal circuit of analog acquisition card
Security protection, the damage to avoid foreign current to each component in analog acquisition card 10.
Optionally, as shown in figure 3, in actual implementation, the current-limiting protection circuit 142 may include first resistor R1,
Second resistance R2, diode, the first protector 143 and the second protector 144；The external electricity in one end of first protector 143
Source, the other end are connect with the input terminal of the diode D, the output end of the diode D and the two-wire system sensor 141
One end connection；The other end, second protector 144 of one end of the first resistor R1 and the two-wire system sensor 141
One end be separately connected, the other end is connect with the input terminal of the analog-digital converter 140, second protector 144 it is another
End ground connection, one end of the second resistance R2 is connect with the input terminal of the analog-digital converter 140, the other end is grounded.This implementation
In example, first protector 143 can be but not limited to fuse, and second protector 144 can be but not limited to TVS
It manages (Transient Volitage Suppressor, transient voltage suppressor).
In real work, since the form that the utility model uses two-wire system sensor carries out the sensor at live end
Power supply and data acquisition, then circuital current is generally 4~20mA, when two according to the design standard of two-wire system sensor
Line sensor current flows through second resistance in system analog quantity acquisition circuit, generates pressure drop, and the analog-digital converter is by the pressure
Depreciation is converted to after digital quantity and is sent to the microprocessor by the optical coupling isolator, and the microprocessor is by the pressure drop
Value is converted to current value, and judges whether the current value has exceeded preset value (such as current range of two-wire system sensor), if
It has exceeded, then determines that there are failures for corresponding binary sensor or current-limiting protection circuit.
Further, the power sense circuit 15 for realizing the power supply status to field power supply end monitoring.Such as figure
Shown, in the present embodiment, the power sense circuit 15 may include 3rd resistor R3 and the 4th resistance R4, the third electricity
One end of resistance R3 is connect with one end of the 4th resistance R4, and the input terminal of the optical coupling isolator 13 is connected to the third
Between resistance R3 and the 4th resistance R4.Wherein, by taking live end power supply is 24V power supply as an example, the power sense circuit 15
The optical coupling isolator is inputted after can carrying out partial pressure conditioning to live end power supply, wherein when live end 24V power supply is normal, institute
The output signal for stating optical coupling isolator is then high level signal, then the height that microprocessor can be sent according to the optical coupling isolator
Level signal determines that the power supply power supply at live end is normal；Conversely, when live end power supply is not powered, or there is supply voltage deficiency
Etc. abnormalities when, the optical coupling isolator export to the microprocessor signal be low level signal, then microprocessor
It can be determined that live end power supply power supply is abnormal according to the low level signal.The variation of the state is passed through feedback by microprocessor simultaneously
To user or other terminals.
It is understood that in order to improve the acquisition precision of the analog acquisition card 10, in the present embodiment, to above-mentioned
In the design of analog quantity acquisition circuit 14 and power sense circuit 15, the first resistor R1, second resistance R2,3rd resistor R3
With the 4th resistance R4 can use the lesser precision resistance of error so that due to resistance generate error can be controlled in 0.5% with
It is interior, for example, metal film precision resistance, line can be selected around precision resistance and metal foil precision resistance etc..
Further, the optical coupling isolator 13 is for realizing the Phototube Coupling to live end and system end, to be promoted
The anti-interference ability of analog acquisition card 10 is stated, good guarantor can be accomplished for system end when such as end is broken down at the scene
Shield.Optionally, in the present embodiment, the optical coupling isolator 13 can be but not limited to the single channel optocoupler of HCPL-181 model.
The microprocessor 11 is for realizing the fault diagnosis to live end, the detection of power supply missing, analog-digital converter 140
Control etc..In the present embodiment, the microprocessor 11 can be selected but be not limited to SPARC V8 architecture microprocessor 11.Separately
Outside, when actual implementation, the EEPROM that controller is integrated in the microprocessor and is connect with the controller, the EEPROM
It is connect with the controller 12.Wherein, communication function of the controller 12 for realizing EtherCAT bus, the EEPROM
For storing 12 work mode configuration information of controller, and realization to the initial configuration of EtherCAT controller 12.
It is understood that the analog acquisition card 10 may also include alarm, the alarm in actual implementation
Connect with the microprocessor 11, with for the microprocessor 11 detect the analog quantity detection circuit there are failure or
It alarms when person's power failure, the present embodiment is not particularly limited herein.
Based on the design and description to above-mentioned analog acquisition card 10, as shown in figure 5, the utility model embodiment also provides
A kind of fault detection method applied to analog acquisition card 10, below with reference to the step of described in Fig. 5 to the fault detection
The detailed process of method is introduced.
Step S1, analog quantity information in 14 collection site of analog quantity acquisition circuit simultaneously pass through after being converted to electric signal
The optical coupling isolator 13 is sent to the microprocessor 11；
Step S2, the microprocessor 11 will receive the electric signal and be compared with preset value, judge the telecommunications
Number size whether meet needs, if not satisfied, then determining the analog quantity acquisition circuit 14, there are failures.
It should be noted that since above-mentioned fault detection method has technology identical with above-mentioned analog acquisition card 10 special
Sign, can refer to accordingly, with respect to the detailed description of the fault detection method to analog acquisition in above-mentioned analog acquisition card 10
The associated description of circuit 14, power sense circuit 15, microprocessor 11 etc., details are not described herein for the present embodiment.
In conclusion the utility model provides a kind of analog acquisition card 10 and fault detection method, wherein by right
The ingehious design of analog acquisition card 10 can either realize the acquisition to in-site modeling amount, can also be achieved in analog acquisition mistake
Fault diagnosis in journey improves the reliability of data acquisition, reduces the human cost in data acquisition.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the flow chart and block diagram in attached drawing are shown
The device of embodiment according to the present utility model, the architectural framework in the cards of method and computer program product, function
And operation.In this regard, each box in flowchart or block diagram can represent one of a module, section or code
Point, a part of the module, section or code includes one or more for implementing the specified logical function executable
Instruction.It should also be noted that function marked in the box can also be attached to be different from some implementations as replacement
The sequence marked in figure occurs.For example, two continuous boxes can actually be basically executed in parallel, they sometimes may be used
To execute in the opposite order, this depends on the function involved.It is also noted that each of block diagram and or flow chart
The combination of box in box and block diagram and or flow chart can be based on the defined function of execution or the dedicated of movement
The system of hardware is realized, or can be realized using a combination of dedicated hardware and computer instructions.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.It should be noted that
To: similar label and letter indicate similar terms in following attached drawing, therefore, once determined in a certain Xiang Yi attached drawing
Justice does not need then that it is further defined and explained in subsequent attached drawing.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (10)
1. a kind of analog acquisition card, which is characterized in that the analog acquisition card includes:
The analog quantity acquisition circuit being acquired for the analog quantity to live end；
The power sense circuit that power supply status is detected is carried out for the power supply to live end；
For realizing the optical coupling isolator of the Phototube Coupling with system end；
Data acquisition is carried out for controlling analog quantity acquisition circuit, and acquire and send according to the analog quantity acquisition circuit
Data whether there is the microprocessor of failure to diagnose the analog quantity acquisition circuit；
Wherein, the analog quantity acquisition circuit and the power sense circuit are connect with one end of the optical coupling isolator respectively,
The microprocessor is connect with the other end of the optical coupling isolator.
2. analog acquisition card according to claim 1, which is characterized in that the analog quantity acquisition circuit includes that modulus turns
Parallel operation and multiple two-wire system sensors, the input terminal of the analog-digital converter and multiple two-wire system sensors are separately connected,
Output end is connect with the optical coupling isolator.
3. analog acquisition card according to claim 2, which is characterized in that the analog quantity acquisition circuit further include with respectively
The two-wire system sensor multiple current-limiting protection circuits correspondingly, the input terminal of the current-limiting protection circuit and the two wires
Sensor processed connects, output end is connect with the analog-digital converter.
4. analog acquisition card according to claim 3, which is characterized in that the current-limiting protection circuit includes the first electricity
Resistance, second resistance, diode, the first protector and the second protector；
One end external power supply, the other end of first protector are connect with the input terminal of the diode, the diode
Output end is connect with one end of the two-wire system sensor；One end of the first resistor is another with the two-wire system sensor
It holds, one end of second protector is separately connected, the other end is connect with the input terminal of the analog-digital converter, second guarantor
The other end ground connection of device is protected, one end of the second resistance is connect with the input terminal of the analog-digital converter, the other end is grounded.
5. analog acquisition card according to claim 4, which is characterized in that first protector includes fuse, institute
Stating the second protector includes TVS pipe.
6. analog acquisition card according to claim 3, which is characterized in that the power sense circuit includes 3rd resistor
With the 4th resistance, one end of the 3rd resistor is connect with one end of the 4th resistance, and the input of the optical coupling isolator
End is connected between the 3rd resistor and the 4th resistance.
7. analog acquisition card according to claim 3, which is characterized in that the microprocessor and the analog acquisition
It is connected between circuit by spi bus.
8. analog acquisition card according to claim 1, which is characterized in that the analog acquisition card further includes
EEPROM, the EEPROM are connect with the controller in the microprocessor.
9. analog acquisition card according to claim 8, which is characterized in that adopted between the EEPROM and the controller
It is connected with iic bus.
10. analog acquisition card according to claim 3, which is characterized in that the analog acquisition card further includes alarm
Device, the alarm are connect with the microprocessor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822238340.4U CN209400679U (en) | 2018-12-28 | 2018-12-28 | Analog acquisition card |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822238340.4U CN209400679U (en) | 2018-12-28 | 2018-12-28 | Analog acquisition card |
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| CN209400679U true CN209400679U (en) | 2019-09-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507612A (en) * | 2018-12-28 | 2019-03-22 | 中电智能科技有限公司 | Analog acquisition card and fault detection method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507612A (en) * | 2018-12-28 | 2019-03-22 | 中电智能科技有限公司 | Analog acquisition card and fault detection method |
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