CN205246751U - Little current continuity of direct current monitors appearance - Google Patents
Little current continuity of direct current monitors appearance Download PDFInfo
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- CN205246751U CN205246751U CN201521099393.2U CN201521099393U CN205246751U CN 205246751 U CN205246751 U CN 205246751U CN 201521099393 U CN201521099393 U CN 201521099393U CN 205246751 U CN205246751 U CN 205246751U
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Abstract
The utility model discloses a little current continuity of direct current monitors appearance, including the load, for the power supply of load power supply and be used for gathering the current monitoring device of the current value that the load flows through, power supply establishes ties in for the return circuit of load power supply has current sampling circuit, the current monitoring device includes the controller, signal conditioning circuit, the clock circuit, memory and communication module, signal conditioning circuit cascades including establishing ties is used for an amplification and filtering circuit of low gain signal amplification and the 2nd amplification and filtering circuit who is used for the high -gain signal amplification, power supply is chargeable call, an amplification and filtering circuit includes rail to rail operational amplifier U1, the 2nd amplification and filtering circuit includes rail to rail operational amplifier U2, the utility model relates to a novelty, simple structure has the function of consecutive collection direct current undercurrent, and the signal conditioning circuit precision is high, and the energy consumption is little to can calculate out the load loss consumption according to current sample intervalometer, safe and reliable, the practicality is strong.
Description
Technical field
The utility model belongs to current acquisition technical field, is specifically related to a kind of DC low current and monitors continuouslyInstrument.
Background technology
In oilfield test application, often need to carry out in well head or down-hole data monitoring according to prison continuouslySurvey result performs an action. Because oil well major part is in remote districts, desolate and uninhabited, more lack power supply unit,Therefore much equipment needs powered battery, and due to instrument longevity of service, therefore, in development and DesignIn the stage, the power consumption of control monitoring instrument that need to be good, makes the work of instrument energy longer time, saves electricityPond cost. So in the development and Design stage, we must understand the power consumption of each working stage instrument.Instrument power consumption in the time of dormancy is extremely low, and electric current is below 10 μ A; When work, electric current is at 0.1-10mA; HoldWhen row actuating mechanism, electric current is at 100-700mA. Therefore, we not only need to detect the electric current in each stageValue, also wants the curent change value of Edge detected state, and can long-term record testing result, automatically calculatingPower consumption. And the continuous monitor of the DC low current in the market with great dynamic range (1 μ A-1A),Relative error is large, and can not save data; Therefore, a kind of wide dynamic range of necessary design, high-precisionThe continuous monitor of DC low current of degree, band storage, can monitor the size of current under different conditions, therebyThe power consumption of watch-dog, the power consumption size of the accurate watch-dog by longer a period of time, comes to equipmentConfigure corresponding battery, according to the power consumption of capacity and the equipment of battery, can timing charge to device batteryOr change reserve battery etc., reliable and stable, fitting operation is convenient, there is very large Research Significance and veryRange of application widely.
Utility model content
Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to carryFor the continuous monitor of a kind of DC low current, it is rationally novel in design, simple in structure, has continuously and adoptsThe function of collection DC low current, signal conditioning circuit precision is high, and energy consumption is little, and can be according to current sampleThe time interval calculates load loss power consumption, safe and reliable, practical, is convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the little electricity of a kind of direct currentFlow continuous monitor, it is characterized in that: comprise load, for the power supply of described load supplying andFor gathering the current monitoring device of the current value that described load flow crosses, described power supply is that load suppliesIn the loop of electricity, be in series with current sampling circuit, described current monitoring device comprises controller, signal tuneReason circuit and clock circuit, memory and the communication module of joining with described controller, described signalModulate circuit comprises the first filtering and amplifying circuit and the use of amplifying for low gain signal of series connection cascadeThe second filtering and amplifying circuit amplifying in high gain signal, the output of described the first filtering and amplifying circuitAll join with the input of controller with the output of the second filtering and amplifying circuit, described current sample electricityThe input of the output on road and the first filtering and amplifying circuit joins; Described power supply is chargeable electricityPond, described the first filtering and amplifying circuit comprises rail-to-rail operational amplifier U1, described the second amplification filteringCircuit comprises rail-to-rail operational amplifier U2.
The above-mentioned continuous monitor of a kind of DC low current, is characterized in that: described rechargeable battery is+ 15V chargeable storage.
The above-mentioned continuous monitor of a kind of DC low current, is characterized in that: described current sampling circuitFor precision resistance R3, one end of described precision resistance R3 and+15V chargeable storage+15V power supplyOutput joins, and the other end of precision resistance R3 and the input of load join.
The above-mentioned continuous monitor of a kind of DC low current, is characterized in that: described rail-to-rail computing is putLarge device U1 comprises chip MAX9922, the RSB pin of described chip MAX9922 and RS+ pin all withOne end of precision resistance R3 and+15V chargeable storage+the link phase of 15V power output endConnect, the RS-pin of chip MAX9922 joins with the other end of precision resistance R3 and the link of load,VDD pin and the 3.3V power supply of chip MAX9922 join, and the OUT pin of chip MAX9922 dividesFour tunnels, the first via is through resistance R 4 and resistance R 5 ground connection, and the second tunnel is through capacitor C 6 and resistance R 4 and electricityThe link of resistance R5 joins, and Third Road and controller join, and Si road is rail-to-rail operational amplifierThe signal output part of U1; The link of the FB pin of chip MAX9922 and resistance R 4 and resistance R 5Join.
The above-mentioned continuous monitor of a kind of DC low current, is characterized in that: described rail-to-rail computing is putLarge device U2 comprises chip AD8230, described chip AD8230-VS pin joins with-5V power supply,Chip AD8230+VS pin joins with+5V power supply, chip AD8230+IN pin and rail-to-railThe signal output part of operational amplifier U1 joins, chip AD8230-IN pin ground connection, chipThe RG pin of AD8230 is through resistance R 2 ground connection, the VOUT pin Fen San road of chip AD8230, a roadJoin through resistance R 1 and the RG pin of chip AD8230 and the link of resistance R 2, another road and controlDevice processed joins, and the negative electrode of Third Road and Zener diode D1 joins; The anode of Zener diode D1 connectsGround.
The above-mentioned continuous monitor of a kind of DC low current, is characterized in that: described controller comprises DSPMicrocontroller or ARM microcontroller.
The above-mentioned continuous monitor of a kind of DC low current, is characterized in that: described communication module comprisesSerial communication modular or wireless communication module.
The utility model compared with prior art has the following advantages:
1, the utility model, by the first filtering and amplifying circuit is set, adopts rail-to-rail operational amplifier U1Carry out the amplification of low gain signal, and rail-to-rail operational amplifier U1 connects 3.3V power supply and makes its output maximumFor 3.3V, the I/O mouth protection controller that is sent to controller is not damaged; The second amplification filtering is setCircuit, adopts rail-to-rail operational amplifier U2 to carry out high gain signal and amplifies the I/O that is sent to controllerMouthful, at the output termination Zener diode D1 of rail-to-rail operational amplifier U2 by rail-to-rail operation amplifierThe output of device U2 is stabilized to a low dc voltage value, to avoid controller to damage; And first putsLarge filter circuit and the second filtering and amplifying circuit adopt the mode of series connection cascade, and circuit is simple, is convenient to push awayWide use.
2, the utility model is preserved load supplying voltage by rechargeable battery is set as power supply,Gather the current value that load flow is crossed, clock circuit is set simultaneously and gathers the current sample time interval, can obtainTo load loss power consumption, reliable and stable, result of use is good.
3, the utility model is rationally novel in design, and volume is little, the parameter of each state of memory load in time,Can continuous acquisition DC low current data by communication module, speed is fast, easy for installation, practical,Be convenient to promote the use of.
In sum, the utility model is rationally novel in design, simple in structure, has continuous acquisition direct currentThe function of little electric current, signal conditioning circuit precision is high, and energy consumption is little, and can be according between the current sample timeEvery calculating load loss power consumption, safe and reliable, practical, be convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is done further and retouched in detailState.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the utility model power supply, current sampling circuit, the first filtering and amplifying circuit andThe circuit connecting relation schematic diagram of two filtering and amplifying circuits.
Description of reference numerals:
1-power supply; 2-current sampling circuit; 3-load;
The 4-the first filtering and amplifying circuit; The 5-the second filtering and amplifying circuit; 6-controller;
7-clock circuit; 8-memory; 9-communication module.
Detailed description of the invention
As depicted in figs. 1 and 2, the power supply that the utility model comprises load 3, powers for described load 3Power supply 1 and for gathering the current monitoring device of the current value that described load 3 flows through, described power supplyIn the loop that power supply 1 is powered for load 3, be in series with current sampling circuit 2, described current monitoring deviceComprise controller 6, signal conditioning circuit and the clock circuit 7 joining with described controller 6, depositReservoir 8 and communication module 9, described signal conditioning circuit comprise series connection cascade for low gain signalThe first filtering and amplifying circuit 4 amplifying and the second filtering and amplifying circuit amplifying for high gain signal5, the output of the output of described the first filtering and amplifying circuit 4 and the second filtering and amplifying circuit 5 is equalJoin with the input of controller 6, the output of described current sampling circuit 2 and the first amplification filteringThe input of circuit 4 joins; Described power supply 1 is rechargeable battery, described the first amplification filteringCircuit 4 comprises rail-to-rail operational amplifier U1, and described the second filtering and amplifying circuit 5 comprises rail-to-rail fortuneCalculate amplifier U2.
As shown in Figure 2, in the present embodiment, described rechargeable battery is+15V chargeable storage.
As shown in Figure 2, in the present embodiment, described current sampling circuit 2 is precision resistance R3, described inOne end of precision resistance R3 and+15V chargeable storage+15V power output end joins, accurate electricityThe resistance other end of R3 and the input of load 3 join.
As shown in Figure 2, in the present embodiment, described rail-to-rail operational amplifier U1 comprises chipMAX9922, the RSB pin of described chip MAX9922 and RS+ pin all with one of precision resistance R3End and+15V chargeable storage+link of 15V power output end joins, chip MAX9922RS-pin join with the other end of precision resistance R3 and the link of load 3, chip MAX9922VDD pin and 3.3V power supply join, the OUT pin Fen Si road of chip MAX9922, the first viaThrough resistance R 4 and resistance R 5 ground connection, the second tunnel is connected through capacitor C 6 and resistance R 4 and resistance R 5End joins, and Third Road and controller 6 join, and Si road is the signal of rail-to-rail operational amplifier U1Output; The link of the FB pin of chip MAX9922 and resistance R 4 and resistance R 5 joins.
As shown in Figure 2, in the present embodiment, described rail-to-rail operational amplifier U2 comprises chip AD8230,Described chip AD8230-VS pin joins with-5V power supply, chip AD8230+VS pin and+5VPower supply joins, chip AD8230+signal output part of IN pin and rail-to-rail operational amplifier U1Join, chip AD8230-IN pin ground connection, the RG pin of chip AD8230 connects through resistance R 2Ground, the VOUT pin Fen San road of chip AD8230, a road is the RG with chip AD8230 through resistance R 1The link of pin and resistance R 2 joins, and another road and controller 6 join, Third Road and voltage stabilizing twoThe negative electrode of utmost point pipe D1 joins; The plus earth of Zener diode D1.
In the present embodiment, described controller 6 comprises DSP microcontroller or ARM microcontroller.
In the present embodiment, described communication module 9 comprises serial communication modular or wireless communication module.
When the utility model uses, power for load 3 by power supply 1, adopt current sample electricityThe current data of the precision resistance R3 acquisition stream overload 3 in road 2, data are through the first amplification filteringChip MAX9922 in circuit 4 carries out low gain signal amplification filtering, regulating resistance R4 and resistanceThe ratio of R5 regulates gain values, the voltage letter after the OUT pin output of chip MAX9922 is amplifiedWhen number entering controller 6, be sent to the second filtering and amplifying circuit 5 of its cascade in chipIn AD8230, the chip AD8230 in the second filtering and amplifying circuit 5 carries out plus and blowup to signalFiltering, the chip MAX9922 in the first filtering and amplifying circuit 4 is rail-to-rail operational amplifier U1, byConnect 3.3V power supply in rail-to-rail operational amplifier U1 and make its output be 3.3V to the maximum, be sent to controllerI/O mouth ensure controller be not damaged; Rail-to-rail operational amplifier U1 is sent to the second amplification filterThe signal gain amplifier numerical value of wave circuit 5 chips AD8230 is by the ratio of resistance R 2 and resistance R 1Determine, the chip AD8230 in the second filtering and amplifying circuit 5 is rail-to-rail operational amplifier U2, adoptsCarry out high gain signal with rail-to-rail operational amplifier U2 and amplify the I/O mouth that is sent to controller,The output termination Zener diode D1 of rail-to-rail operational amplifier U2 is by rail-to-rail operational amplifier U2Output be stabilized to a low dc voltage value, with avoid controller damage;
Because rail-to-rail operational amplifier U1 and rail-to-rail operational amplifier U2 are that series connection cascade is connected, if the voltage that the precision resistance R3 in current sampling circuit 2 collects is through rail-to-rail operation amplifierWhen device U1 full scale, signal continues signal amplification through rail-to-rail operational amplifier U2 and is sent to controlIn device 6, carry out analog-to-digital conversion, be stored in memory 8; If the precision electricity in current sampling circuit 2The voltage that collects of resistance R3 is through rail-to-rail operational amplifier U1 not when full scale, 6 collections of controllerThe amplification filtering signal of rail-to-rail operational amplifier U1 output, is stored in memory 8; While passing throughClock circuit 7 record current sampling time intervals, according to the voltage in power supply 1, signal condition electricityCurrent parameters in road and the current sample time interval calculate load loss power consumption and are kept at memory 8In, can transmit or transfer by communication module 9 data of storage, for subsequent reference, reliably steadyFixed, result of use is good.
The above, be only preferred embodiment of the present utility model, not the utility model done anyRestriction, every any simple modification of above embodiment being done according to the utility model technical spirit,Change and equivalent structure variation, all still belong in the protection domain of technical solutions of the utility model.
Claims (7)
1. the continuous monitor of DC low current, is characterized in that: comprise load (3), be instituteState the power supply (1) of load (3) power supply and the electricity flowing through for gathering described load (3)The current monitoring device of flow valuve, described power supply (1) is connected in the loop for load (3) power supplyHave current sampling circuit (2), described current monitoring device comprises controller (6), signal condition electricityRoad and the clock circuit (7), the memory (8) and the mould of communicating by letter that join with described controller (6)Piece (9), described signal conditioning circuit comprise series connection cascade for low gain signal amplify firstFiltering and amplifying circuit (4) and the second filtering and amplifying circuit (5) amplifying for high gain signal, instituteState the output of the first filtering and amplifying circuit (4) and the output of the second filtering and amplifying circuit (5) is equalJoin with the input of controller (6), the output of described current sampling circuit (2) and first is putThe input of large filter circuit (4) joins; Described power supply (1) is rechargeable battery, described inThe first filtering and amplifying circuit (4) comprises rail-to-rail operational amplifier U1, described the second amplification filtering electricityRoad (5) comprises rail-to-rail operational amplifier U2.
2. according to the continuous monitor of a kind of DC low current claimed in claim 1, it is characterized in that:Described rechargeable battery is+15V chargeable storage.
3. according to the continuous monitor of a kind of DC low current claimed in claim 2, it is characterized in that:Described current sampling circuit (2) is precision resistance R3, one end of described precision resistance R3 and+15VChargeable storage+15V power output end joins, the other end of precision resistance R3 and load (3)Input join.
4. according to the continuous monitor of a kind of DC low current claimed in claim 3, it is characterized in that:Described rail-to-rail operational amplifier U1 comprises chip MAX9922, the RSB of described chip MAX9922Pin and RS+ pin all with one end of precision resistance R3 and+15V chargeable storage+15V power supplyThe link of output joins, the RS-pin of chip MAX9922 and the other end of precision resistance R3 andThe link of load (3) joins, and VDD pin and the 3.3V power supply of chip MAX9922 join, coreThe OUT pin Fen Si road of sheet MAX9922, the first via is through resistance R 4 and resistance R 5 ground connection, the second tunnelJoin through capacitor C 6 and the link of resistance R 4 and resistance R 5, Third Road and controller (6) join,Si road is the signal output part of rail-to-rail operational amplifier U1; The FB pin of chip MAX9922 withThe link of resistance R 4 and resistance R 5 joins.
5. according to the continuous monitor of a kind of DC low current claimed in claim 4, it is characterized in that:Described rail-to-rail operational amplifier U2 comprises chip AD8230, described chip AD8230-VS pinJoin with-5V power supply, chip AD8230+VS pin joins with+5V power supply, chip AD8230+ signal output part of IN pin and rail-to-rail operational amplifier U1 joins, chip AD8230-INPin ground connection, the RG pin of chip AD8230 is through resistance R 2 ground connection, the VOUT of chip AD8230Pin Fen San road, a road is through resistance R 1 and the RG pin of chip AD8230 and the link of resistance R 2Join, another road and controller (6) join, and the negative electrode of Third Road and Zener diode D1 joins;The plus earth of Zener diode D1.
6. according to the continuous monitor of a kind of DC low current claimed in claim 1, it is characterized in that:Described controller (6) comprises DSP microcontroller or ARM microcontroller.
7. according to the continuous monitor of a kind of DC low current claimed in claim 1, it is characterized in that:Described communication module (9) comprises serial communication modular or wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521099393.2U CN205246751U (en) | 2015-12-26 | 2015-12-26 | Little current continuity of direct current monitors appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521099393.2U CN205246751U (en) | 2015-12-26 | 2015-12-26 | Little current continuity of direct current monitors appearance |
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| Publication Number | Publication Date |
|---|---|
| CN205246751U true CN205246751U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521099393.2U Expired - Fee Related CN205246751U (en) | 2015-12-26 | 2015-12-26 | Little current continuity of direct current monitors appearance |
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| Country | Link |
|---|---|
| CN (1) | CN205246751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645933A (en) * | 2016-12-07 | 2017-05-10 | 成都信息工程大学 | System for monitoring energy consumption of tail fin of robotic fish |
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2015
- 2015-12-26 CN CN201521099393.2U patent/CN205246751U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645933A (en) * | 2016-12-07 | 2017-05-10 | 成都信息工程大学 | System for monitoring energy consumption of tail fin of robotic fish |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20161226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |