CN207730827U - DC voltage sample circuit based on self-maintained circuit - Google Patents
DC voltage sample circuit based on self-maintained circuit Download PDFInfo
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- CN207730827U CN207730827U CN201820206767.3U CN201820206767U CN207730827U CN 207730827 U CN207730827 U CN 207730827U CN 201820206767 U CN201820206767 U CN 201820206767U CN 207730827 U CN207730827 U CN 207730827U
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- 238000004804 winding Methods 0.000 claims abstract description 32
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 210000001367 artery Anatomy 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses the DC voltage sample circuits based on self-maintained circuit, including sampling resistor R4 and the self-maintained circuit being parallel between DC signal source and the armature winding of pulse transformer TR2, the secondary windings of the pulse transformer TR2 is sequentially connected current rectifying and wave filtering circuit, operational amplifier output sampled signal.Direct current signal is superimposed upon on the AC signal of self-maintained circuit generation by the utility model, after being isolated by pulse transformer, then carries out rectification and exchange is reduced to direct current, analysis is extracted to original signal；The required precision to sampling resistor is effectively reduced, used device is all less expensive, and cost is used to substantially reduce.
Description
Technical field
The utility model is related to direct current sample circuit fields, and in particular to the DC voltage sampling based on self-maintained circuit
Circuit.
Background technology
There are many modes for DC voltage sampling, most common no more than being acquired using precision resistance, but work as voltage class
When relatively high, precision and power requirement to sampling resistor also can be very high, and price is also somewhat expensive；Also useful Hall element carries out straight
The mode of voltage sample is flowed, the disadvantage is that need to carry out positive-negative power power supply, it is inconvenient for use, and price also relatively compares
It is expensive.
Invention content
The technical problem to be solved by the present invention is to provide a kind of, and the DC voltage sampling based on self-maintained circuit is electric
Road can solve existing DC voltage sampling when voltage class is relatively high, and the precision and power requirement to sampling resistor are high, lead
Cause cost also can be relatively high problem.
The utility model is achieved through the following technical solutions：
DC voltage sample circuit based on self-maintained circuit, including it is parallel to DC signal source and pulse transformer
The secondary windings of sampling resistor R4 between the armature winding of TR2 and self-maintained circuit, the pulse transformer TR2 connects successively
Connect current rectifying and wave filtering circuit, operational amplifier output sampled signal.
The further scheme of the utility model is that the self-maintained circuit is by capacitance C5, capacitance C6, resistance R5, resistance
R6, triode Q3, triode Q4 compositions；The triode Q3, triode Q4 emitter be parallel to DC signal source cathode, institute
The collector for stating triode Q3 is parallel with three branches, and wherein the first branch is through resistance R5 connection base stages, and the second branch is through capacitance
The base stage of C5 connecting triodes Q4, third branch connect the first armature winding anode of pulse transformer TR2, the triode Q3
Collector of the base stage also through capacitance C6 connecting triodes Q4；The base stage of the triode Q4 is through resistance R6 connection collectors, collection
Electrode connects the second armature winding cathode of pulse transformer TR2；The first armature winding cathode of the pulse transformer TR2 and
Second armature winding anode is parallel to the one end sampling resistor R4.
The further scheme of the utility model is that the current rectifying and wave filtering circuit is by diode D3, diode D4 and capacitance C4
Composition；The diode D3, diode D4 anode be connected to the first secondary windings anode and the of pulse transformer TR2
Secondary stage winding cathode, the diode D3, diode D4 cathode be parallel to capacitance C4 anode, the of pulse transformer TR2
One secondary windings cathode and second subprime winding anode are parallel to the capacitance C4 cathode of ground connection.
The further scheme of the utility model is that sliding is additionally provided between the current rectifying and wave filtering circuit and operational amplifier
Output end the two poles of the earth of rheostat R86, the current rectifying and wave filtering circuit are separately connected the fixed resistance both ends of slide rheostat R86, fortune
Calculate the sliding end of the input terminal connection slide rheostat R86 of amplifier；Output by slide rheostat to current rectifying and wave filtering circuit
Signal is depressured, and is reduced the requirement to operational amplifier, is further reduced the cost.
The utility model compared with prior art the advantages of be：
Direct current signal is superimposed upon on the AC signal of self-maintained circuit generation, after being isolated by pulse transformer, then
It carries out rectification and exchange is reduced to direct current, analysis is extracted to original signal；Effectively reduce the required precision to sampling resistor, institute
The device of use is all less expensive, and cost is used to substantially reduce.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
DC voltage sample circuit based on self-maintained circuit as shown in Figure 1, including be parallel to DC signal source and
Sampling resistor R4 between the armature winding of pulse transformer TR2 and self-maintained circuit 1, time of the pulse transformer TR2
Grade winding is sequentially connected current rectifying and wave filtering circuit 2, slide rheostat R86, operational amplifier U1A output sampled signals.
The self-maintained circuit 1 is made of capacitance C5, capacitance C6, resistance R5, resistance R6, triode Q3, triode Q4；
The triode Q3, triode Q4 emitter be parallel to DC signal source cathode, the collector of the triode Q3 is parallel with
Three branches, the wherein first branch are through resistance R5 connection base stages, base stage of the second branch through capacitance C5 connecting triodes Q4, third
Branch connects the first armature winding anode of pulse transformer TR2, and the base stage of the triode Q3 is also through three pole of capacitance C6 connections
The collector of pipe Q4；For the base stage of the triode Q4 through resistance R6 connection collectors, collector connects the of pulse transformer TR2
Two armature winding cathode；The the first armature winding cathode and the second armature winding anode of the pulse transformer TR2 is parallel to and adopts
The one end sample resistance R4.
The current rectifying and wave filtering circuit 2 is made of diode D3, diode D4 and capacitance C4；The diode D3, diode
The anode of D4 is connected to the first secondary windings anode and second subprime winding cathode of pulse transformer TR2, two pole
Pipe D3, diode D4 cathode be parallel to capacitance C4 anode, the first secondary windings cathode and second subprime of pulse transformer TR2
Winding anode is parallel to the capacitance C4 cathode of ground connection；The positive and negative electrode of the capacitance C4 is also respectively connected with consolidating for slide rheostat R86
Determine resistance both ends, the sliding end of the input anode connection slide rheostat R86 of operational amplifier U1A, output end is drawn all the way
Feedback signal is also grounded through resistance R8 through resistance R7 connection input cathodes, input cathode.
In the present embodiment, DC signal source from VH3.96-3A type terminals CN2 access, triode Q3, triode Q4 type
Number it is S8050, the model of pulse transformer TR2 is EE10, no-load voltage ratio 2:1, diode D3, diode D4 model be
The model of IN5819, operational amplifier U1A are LM358.
Claims (4)
1. the DC voltage sample circuit based on self-maintained circuit, it is characterised in that：Including being parallel to DC signal source and arteries and veins
Rush sampling resistor R4 and the self-maintained circuit between the armature winding of transformer TR2（1）, time of the pulse transformer TR2
Grade winding is sequentially connected current rectifying and wave filtering circuit（2）, operational amplifier export sampled signal.
2. the DC voltage sample circuit based on self-maintained circuit as described in claim 1, it is characterised in that：The self-excitation
Oscillating circuit（1）It is made of capacitance C5, capacitance C6, resistance R5, resistance R6, triode Q3, triode Q4；The triode Q3,
The emitter of triode Q4 is parallel to DC signal source cathode, and the collector of the triode Q3 is parallel with three branches, wherein
The first branch connects pulse through resistance R5 connection base stages, base stage of the second branch through capacitance C5 connecting triodes Q4, third branch
The first armature winding anode of transformer TR2, the collector of the base stage of the triode Q3 also through capacitance C6 connecting triodes Q4；
For the base stage of the triode Q4 through resistance R6 connection collectors, the second armature winding that collector connects pulse transformer TR2 is negative
Pole；The the first armature winding cathode and the second armature winding anode of the pulse transformer TR2 is parallel to the one end sampling resistor R4.
3. the DC voltage sample circuit based on self-maintained circuit as described in claim 1, it is characterised in that：The rectification
Filter circuit（2）It is made of diode D3, diode D4 and capacitance C4；The diode D3, the positive of diode D4 connect respectively
It is connected to the first secondary windings anode and second subprime winding cathode of pulse transformer TR2, the diode D3, diode D4
Cathode is parallel to capacitance C4 anodes, and the first secondary windings cathode and second subprime winding anode of pulse transformer TR2 are parallel to
The capacitance C4 cathode of ground connection.
4. the DC voltage sample circuit based on self-maintained circuit as described in claim 1, it is characterised in that：The rectification
Filter circuit（2）Slide rheostat R86, the current rectifying and wave filtering circuit are additionally provided between operational amplifier（2）Output end
The two poles of the earth are separately connected the fixed resistance both ends of slide rheostat R86, the input terminal connection slide rheostat R86's of operational amplifier
Sliding end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820206767.3U CN207730827U (en) | 2018-02-06 | 2018-02-06 | DC voltage sample circuit based on self-maintained circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820206767.3U CN207730827U (en) | 2018-02-06 | 2018-02-06 | DC voltage sample circuit based on self-maintained circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207730827U true CN207730827U (en) | 2018-08-14 |
Family
ID=63081135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820206767.3U Active CN207730827U (en) | 2018-02-06 | 2018-02-06 | DC voltage sample circuit based on self-maintained circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709368A (en) * | 2019-01-16 | 2019-05-03 | 中国科学院空间应用工程与技术中心 | A kind of impulse sampling isolation circuit |
| CN112986657A (en) * | 2021-05-07 | 2021-06-18 | 宁波中车时代传感技术有限公司 | Self-powered direct-current voltage measurement control circuit and measurement device |
-
2018
- 2018-02-06 CN CN201820206767.3U patent/CN207730827U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709368A (en) * | 2019-01-16 | 2019-05-03 | 中国科学院空间应用工程与技术中心 | A kind of impulse sampling isolation circuit |
| CN109709368B (en) * | 2019-01-16 | 2024-03-22 | 中国科学院空间应用工程与技术中心 | Pulse sampling isolation circuit |
| CN112986657A (en) * | 2021-05-07 | 2021-06-18 | 宁波中车时代传感技术有限公司 | Self-powered direct-current voltage measurement control circuit and measurement device |
| CN112986657B (en) * | 2021-05-07 | 2021-08-13 | 宁波中车时代传感技术有限公司 | Self-powered direct-current voltage measurement control circuit and measurement device |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190812 Address after: Room 101, Unit 1, Block 1, Building B5, 555 Pioneer Road, Dayun Town, Jiashan County, Jiaxing City, Zhejiang Province, 314000 Patentee after: ZHEJIANG YUESHI NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: 223100 Hongze Economic Development Zone, Huaian City, Jiangsu Province Patentee before: JIANGSU HUABO CNC EQUIPMENT CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240709 Address after: No. 135, Health West Road, Jinhu Economic Development Zone, Huai'an City, Jiangsu Province, China 211625 Patentee after: Huai'an Daodao Xiaoniu New Energy Technology Co.,Ltd. Country or region after: China Address before: 314000 Room 101, 1st floor, unit 1, building B5, No. 555, Chuangye Road, Dayun Town, Jiashan County, Jiaxing City, Zhejiang Province Patentee before: ZHEJIANG YUESHI NEW MATERIAL TECHNOLOGY Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |