CN207992770U - A kind of sampling module - Google Patents
A kind of sampling module Download PDFInfo
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- CN207992770U CN207992770U CN201820492534.4U CN201820492534U CN207992770U CN 207992770 U CN207992770 U CN 207992770U CN 201820492534 U CN201820492534 U CN 201820492534U CN 207992770 U CN207992770 U CN 207992770U
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Abstract
The utility model discloses a kind of sampling modules, including：The output end of current sampling circuit and voltage sampling circuit, the current sampling circuit and voltage sampling circuit is connect with the first, second A/D interfaces of dsp controller respectively, and the current sampling circuit includes：The closed-loop Hall current sensor of concatenation, amplifying circuit, biasing circuit, first voltage follower, the output end of the first voltage follower are connect with the first A/D interfaces, and the voltage sampling circuit includes：The Hall voltage sensor of concatenation, inverting amplifier, second voltage follower, regulator circuit, the output end of the regulator circuit are connect with the 2nd A/D interfaces.Utilize current sampling circuit and voltage sampling circuit, the electric current and voltage of alternating current are sampled simultaneously, and before being sampled using dsp controller, carries out preliminary Linear Amplifer using amplifying circuit and see-saw circuit and calculate so that dsp controller samples more accurate.It can be used in UPS manufactures.
Description
Technical field
The utility model is related to switch power technology field, more particularly to a kind of sampling module.
Background technology
Uninterruptible power supply (UPS) is a kind of very important emergency service equipment in outside.When input alternating current interrupts,
UPS, which can be continued for a period of time, supplies electricity to other equipment such as office computer, enables us to have the sufficient time to go to be answered
It is right；Simultaneously when alternating current is abnormal, UPS can also effectively purify alternating current.Meanwhile uninterruptible power supply is as a kind of
Power electronic equipment, the inverter circuit with maintenance-free stored energy equipment and automatic control type also have analog circuit
And digital circuit.With the development of society, UPS, in factory, company, the even every field such as family have obtained widely answering
With the importance of UPS will obtain raising increasingly.
By the statistical data of Internet data center, because causing the failure of apparatus such as computer the problem of power supply, this ratio
Example accounts for about percent 45 or so.In addition, power supply also has the various kinds problems such as voltage transient is excessively high, input powers off, voltage ripple is excessive.
Simultaneously in China, the number that big city, medium-sized city and small city or villages and small towns averagely power off be respectively 0.5 time monthly, 2 times it is every
Month and 4 times monthly.From the above it can be seen that in order to solve the problems, such as power supply instability, one UPS of configuration to external equipment, this
It is very important.In addition, for high-end communication apparatus and the high-end network equipment, these cannot all allow have power-off
It happens；The especially heart in a network, is run using server as pith, such UPS, which just seems, more to be aggravated
It has wanted.Either common computer or expensive computer, with after a period of time, the file data in computer will seem
It is very valuable, so in order to prevent unexpected disappear of file data and configuring a uninterruptible power supply is necessary.
Existing UPS mostly uses greatly dsp controller as control chip, and to control other function modules, DSP is controlled
Device processed is TMS320F28335 chips, and wherein dsp controller needs to sample voltage or electric current, existing sample mode
The big AD carried in dsp controller that mostly uses samples to realize, the sample precision of the included AD samplings of the chip is not high, to
Influence the sampling precision of entire UPS.
Utility model content
The utility model solve the technical issues of be：The sample precision of existing UPS is not high.
The solution that the utility model solves its technical problem is：A kind of sampling module, including：Current sampling circuit and
The output end of voltage sampling circuit, the current sampling circuit and voltage sampling circuit respectively with dsp controller first, second
A/D interfaces connect, and the current sampling circuit includes：The closed-loop Hall current sensor of concatenation, amplifying circuit, biasing circuit,
First voltage follower, the output end of the first voltage follower are connect with the first A/D interfaces, the voltage sample electricity
Road includes：The Hall voltage sensor of concatenation, inverting amplifier, second voltage follower, regulator circuit, the regulator circuit
Output end is connect with the 2nd A/D interfaces.
Further, the amplifying circuit includes：Resistance R91, R92, capacitance C91, operational amplifier U91, the biased electrical
Road includes：Resistance R93, capacitance C92, the first voltage follower include：Operational amplifier U92, one end of the resistance R91
It is connect with the in-phase input end of operational amplifier U91, the other end of the resistance R91 connects over the ground, the operational amplifier U91
Inverting input respectively with the output end of closed-loop Hall current sensor, one end of resistance R92, capacitance C91 one end connection,
The output end of the operational amplifier U91 other end with resistance R92 respectively, the other end of capacitance C91, one end of capacitance C92,
One end of resistance R93, the in-phase input end connection of operational amplifier U92, the other end of the capacitance C92 connects over the ground, described
Other end connection+1.65V the power supplys of resistance R93, the inverting input of the operational amplifier U92 are connect with its output end,
The output end of operational amplifier U92 is connect with the first A/D interfaces；
The inverting amplifier includes：Resistance R94, R95, R96, operational amplifier U93, the second voltage follower packet
It includes：Operational amplifier U94, the regulator circuit include：One end of capacitance C93, voltage-stabiliser tube D91, the resistance R94 and Hall electricity
The output end of pressure sensor connects, and the other end of resistance R94 one end with resistance R95 respectively, operational amplifier U93's is anti-
Phase input terminal connects, and one end of the resistance R96 is connect with the in-phase input end of operational amplifier U93, and the resistance R96's is another
One end connects over the ground, and the output end of the operational amplifier U93 other end with resistance R95 respectively, operational amplifier U94's is same
Phase input terminal connects, and the inverting input of the operational amplifier U94 is connect with its output end, the operational amplifier U94
Output end one end with capacitance C93 respectively, the cathode of voltage-stabiliser tube D91, the connection of the 2nd A/D interfaces, the capacitance C93's is another
End, the anode of voltage-stabiliser tube D91 connect over the ground respectively.
Further, the model LA-50P sensors of the closed-loop Hall current sensor.
Further, the Hall voltage sensor model VSM500D.
The utility model has the beneficial effects that：The invention utilizes current sampling circuit and voltage sampling circuit, simultaneously
The electric current and voltage of alternating current are sampled, and before carrying out AD samplings using dsp controller, utilize amplifying circuit and reverse phase
Amplifying circuit carries out preliminary Linear Amplifer and calculates so that sampling it is more accurate.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the circuit connection block diagram of the sampling module of the invention；
Fig. 2 is the circuit connection diagram of sampling module.
Specific implementation mode
The technique effect of the design of the utility model, concrete structure and generation is carried out below with reference to embodiment and attached drawing
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
The other embodiment that art personnel are obtained without creative efforts belongs to the model of the utility model protection
It encloses.In addition, all connection/connection relations being previously mentioned in text, not singly refer to component and directly connect, and referring to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to form more preferably coupling structure.Each technology in the invention is special
Sign, can be with combination of interactions under the premise of not conflicting conflict.
Embodiment 1, with reference to figure 1 and Fig. 2, a kind of sampling module, including：Current sampling circuit 8a and voltage sampling circuit
The output end of 8b, the current sampling circuit 8a and voltage sampling circuit 8b connect with the first, second A/D of dsp controller 4 respectively
Mouth AD1, AD2 connection, the current sampling circuit 8a include：The closed-loop Hall current sensor 81 of concatenation, amplifying circuit 82, partially
Circuits 83, first voltage follower 84, the output end of the first voltage follower 84 connect with the first A/D interfaces AD1
It connects, the voltage sampling circuit 8b includes：The Hall voltage sensor 85 of concatenation, inverting amplifier 86, second voltage follower
87, regulator circuit 88, the output end of the regulator circuit 88 are connect with the 2nd A/D interfaces AD2.
The amplifying circuit 82 includes：Resistance R91, R92, capacitance C91, operational amplifier U91, the biasing circuit 83 wrap
It includes：Resistance R93, capacitance C92, the first voltage follower 84 include：Operational amplifier U92, one end of the resistance R91 with
The in-phase input end of operational amplifier U91 connects, and the other end of the resistance R91 connects over the ground, the operational amplifier U91's
The output end with closed-loop Hall current sensor 81, one end of one end of resistance R92, capacitance C91 connect inverting input respectively,
The output end of the operational amplifier U91 other end with resistance R92 respectively, the other end of capacitance C91, one end of capacitance C92,
One end of resistance R93, the in-phase input end connection of operational amplifier U92, the other end of the capacitance C92 connects over the ground, described
Other end connection+1.65V the power supplys of resistance R93, the inverting input of the operational amplifier U92 are connect with its output end,
The output end of operational amplifier U92 is connect with the first A/D interfaces AD1；
The inverting amplifier 86 includes：Resistance R94, R95, R96, operational amplifier U93, the second voltage follower
87 include：Operational amplifier U94, the regulator circuit 88 include：Capacitance C93, voltage-stabiliser tube D91, one end of the resistance R94 with
The output end of Hall voltage sensor 85 connects, the other end of resistance R94 one end with resistance R95 respectively, operation amplifier
The inverting input of device U93 connects, and one end of the resistance R96 is connect with the in-phase input end of operational amplifier U93, the electricity
The other end of resistance R96 connects over the ground, the output end of the operational amplifier U93 other end with resistance R95 respectively, operation amplifier
The in-phase input end of device U94 connects, and the inverting input of the operational amplifier U94 is connect with its output end, the operation
One end with capacitance C93, the cathode of voltage-stabiliser tube D91, the 2nd A/D interfaces AD2 connections are described respectively for the output end of amplifier U94
The anode of the other end of capacitance C93, voltage-stabiliser tube D91 connects over the ground respectively.
When the work of the circuit of the invention, the closed-loop Hall current sensor 81 and Hall voltage sensor 85
Input terminal is separately connected alternating current.
The current signal of alternating current is converted into voltage signal by closed-loop Hall current sensor 81, as an optimization, the closed loop
Hall current sensor 81 can reach the current effective value of 50A using the LA-50P sensors of lime company research and development, maximum
There is the current value of ± 80A.The signal that closed-loop Hall current sensor 81 exports is input in amplifying circuit 82, the amplifying circuit
82 is by resistance R91, R92, capacitance C91, the reverse phase scaling circuit 82 of operational amplifier U91 compositions, and the circuit is by signal
Linear Amplifer calculating is carried out to carry out because the first A/D interfaces AD1 of dsp controller 4 can not sample negative value
After Linear Amplifer calculates, then add+1.65V a DC bias circuit 83 so that negative value becomes just, finally by first
The output end of voltage follower 84 is sent in the first A/D interfaces AD1, realizes the acquisition of electric current.
The voltage of alternating current passes through Hall voltage sensor 85, and the Hall voltage sensor 85 turns the voltage signal of alternating current
Become current signal, as an optimization, the Hall voltage sensor 85 is the VSM500D of Jiangsu camellia Sensitive Object research and development,
Specified detection voltage is 500V, and the electric current of measurement range 0~± 750V, the output of Hall voltage sensor 85 passes through inverting amplifier
86, wherein generating voltage signal by resistance R94, which carries out Linear Amplifer calculating by operational amplifier U93, then
It is input in the 2nd A/D interfaces AD2 of dsp controller 4 by second voltage follower 87, to realize voltage sample, in order to
So that signal is more stablized, regulator circuit 88 is connected in the output end of second voltage follower 87.
The invention utilizes current sampling circuit 8a and voltage sampling circuit 8b, at the same electric current to alternating current and voltage into
Row sampling, and before being sampled using dsp controller 4, carried out tentatively using amplifying circuit 82 and see-saw circuit 82
Linear Amplifer calculate so that dsp controller 4 samples more accurate.By test, increase the essence of the sampling after this sampling module
Degree increases 20% than the sampling precision merely using dsp controller 4.
The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of sampling module, which is characterized in that including：Current sampling circuit and voltage sampling circuit, the current sample electricity
The output end of road and voltage sampling circuit is connect with the first, second A/D interfaces of dsp controller respectively, the current sample electricity
Road includes：The closed-loop Hall current sensor of concatenation, amplifying circuit, biasing circuit, first voltage follower, the first voltage
The output end of follower is connect with the first A/D interfaces, and the voltage sampling circuit includes：The Hall voltage of concatenation senses
Device, inverting amplifier, second voltage follower, regulator circuit, the output end of the regulator circuit connect with the 2nd A/D interfaces
It connects.
2. a kind of sampling module according to claim 1, it is characterised in that：
The amplifying circuit includes：Resistance R91, R92, capacitance C91, operational amplifier U91, the biasing circuit include：Resistance
R93, capacitance C92, the first voltage follower include：Operational amplifier U92, one end of the resistance R91 and operation amplifier
The in-phase input end of device U91 connects, and the other end of the resistance R91 connects over the ground, the anti-phase input of the operational amplifier U91
End is respectively with the output end of closed-loop Hall current sensor, and one end of resistance R92, one end connection of capacitance C91, the operation puts
The output end of the big device U91 other end with resistance R92 respectively, the other end of capacitance C91, one end of capacitance C92, resistance R93's
One end, the in-phase input end connection of operational amplifier U92, the other end of the capacitance C92 connect over the ground, the resistance R93's
Other end connection+1.65V power supplys, the inverting input of the operational amplifier U92 are connect with its output end, operational amplifier
The output end of U92 is connect with the first A/D interfaces；
The inverting amplifier includes：Resistance R94, R95, R96, operational amplifier U93, the second voltage follower include：
Operational amplifier U94, the regulator circuit include：Capacitance C93, voltage-stabiliser tube D91, one end of the resistance R94 and Hall voltage
The output end of sensor connects, the other end of resistance R94 one end with resistance R95 respectively, the reverse phase of operational amplifier U93
Input terminal connects, and one end of the resistance R96 is connect with the in-phase input end of operational amplifier U93, and the resistance R96's is another
End connects over the ground, the output end of the operational amplifier U93 other end with resistance R95 respectively, the same phase of operational amplifier U94
Input terminal connects, and the inverting input of the operational amplifier U94 is connect with its output end, the operational amplifier U94's
One end with capacitance C93, the cathode of voltage-stabiliser tube D91, the 2nd A/D interfaces connect output end respectively, and the capacitance C93's is another
End, the anode of voltage-stabiliser tube D91 connect over the ground respectively.
3. a kind of sampling module according to claim 1 or 2, which is characterized in that the closed-loop Hall current sensor
Model LA-50P sensors.
4. a kind of sampling module according to claim 3, which is characterized in that the Hall voltage sensor model
VSM500D。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820492534.4U CN207992770U (en) | 2018-04-08 | 2018-04-08 | A kind of sampling module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820492534.4U CN207992770U (en) | 2018-04-08 | 2018-04-08 | A kind of sampling module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207992770U true CN207992770U (en) | 2018-10-19 |
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ID=63830642
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820492534.4U Expired - Fee Related CN207992770U (en) | 2018-04-08 | 2018-04-08 | A kind of sampling module |
Country Status (1)
| Country | Link |
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| CN (1) | CN207992770U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406863A (en) * | 2018-12-29 | 2019-03-01 | 常熟开关制造有限公司(原常熟开关厂） | A kind of ac parameter detection method and device of low-cost and high-precision |
| CN110361671A (en) * | 2018-04-08 | 2019-10-22 | 佛山科学技术学院 | A kind of sampling module for UPS |
| CN111665385A (en) * | 2020-06-05 | 2020-09-15 | 河南华兴通信技术有限公司 | Communication base station safety monitoring device |
-
2018
- 2018-04-08 CN CN201820492534.4U patent/CN207992770U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361671A (en) * | 2018-04-08 | 2019-10-22 | 佛山科学技术学院 | A kind of sampling module for UPS |
| CN109406863A (en) * | 2018-12-29 | 2019-03-01 | 常熟开关制造有限公司(原常熟开关厂） | A kind of ac parameter detection method and device of low-cost and high-precision |
| CN109406863B (en) * | 2018-12-29 | 2020-09-01 | 常熟开关制造有限公司(原常熟开关厂） | Low-cost high-precision alternating current parameter detection method and device |
| CN111665385A (en) * | 2020-06-05 | 2020-09-15 | 河南华兴通信技术有限公司 | Communication base station safety monitoring device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 |
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| CF01 | Termination of patent right due to non-payment of annual fee |