CN206756915U - A kind of generative circuit of high precision electro flow pattern detection signal - Google Patents
A kind of generative circuit of high precision electro flow pattern detection signal Download PDFInfo
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- CN206756915U CN206756915U CN201720687641.8U CN201720687641U CN206756915U CN 206756915 U CN206756915 U CN 206756915U CN 201720687641 U CN201720687641 U CN 201720687641U CN 206756915 U CN206756915 U CN 206756915U
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Abstract
Current mode detection signal generative circuit is the utility model is related to, specifically a kind of generative circuit of high precision electro flow pattern detection signal.The utility model solves the problems, such as that the signal accuracy of traditional current mode detection signal generative circuit generation is relatively low.A kind of generative circuit of high precision electro flow pattern detection signal, including single-chip microcomputer, Keysheet module, DDS chips, LCD module, the first to the 3rd amplifier, Schottky diode, NPN triode, the first electric capacity, the second electric capacity, the first to the 17th resistance, the first to the 3rd power end；Wherein, the first amplifier is instrumentation amplifier；Second amplifier, the 3rd amplifier are operational amplifier；3rd resistor, the 5th resistance, the tenth resistance are adjustable resistance；The signal input part of single-chip microcomputer and the signal output part of Keysheet module connect；The signal output part of single-chip microcomputer is connected with the signal input part of DDS chips and the signal input part of LCD module respectively.The utility model is applied to the various tests of current mode data collecting instrument.
Description
Technical field
Current mode detection signal generative circuit is the utility model is related to, specifically a kind of high precision electro flow pattern detection signal
Generative circuit.
Background technology
The various tests of current mode data collecting instrument（Such as amplitude-frequency response test, demarcation test, triggering test etc.）It is both needed to
Outside to provide high-precision current mode detection signal.Traditional current mode detection signal generative circuit is mainly filled by signal
Put, press the parts such as stream modular converter, bias adjustment circuit, power supply, cable to form.But practice have shown that, the inspection of traditional current mode
Signal generating circuit is surveyed because using open loop structure, the signal accuracy for causing it to generate is relatively low, thus causes current mode data to be adopted
The testing efficiency for collecting instrument is relatively low.Based on this, it is necessary to a kind of brand-new current mode detection signal generative circuit is invented, to solve to pass
Above mentioned problem existing for the current mode detection signal generative circuit of system.
The content of the invention
In order to solve, the signal accuracy of traditional current mode detection signal generative circuit generation is relatively low to ask the utility model
A kind of topic, there is provided generative circuit of high precision electro flow pattern detection signal.
The utility model adopts the following technical scheme that realization：
A kind of generative circuit of high precision electro flow pattern detection signal, including single-chip microcomputer, Keysheet module, DDS chips, LCD moulds
Block, the first to the 3rd amplifier, Schottky diode, NPN triode, the first electric capacity, the second electric capacity, the first to the 17th electricity
Resistance, the first to the 3rd power end；
Wherein, the first amplifier is instrumentation amplifier；Second amplifier, the 3rd amplifier are operational amplifier；3rd
Resistance, the 5th resistance, the tenth resistance are adjustable resistance；
The signal input part of single-chip microcomputer and the signal output part of Keysheet module connect；The signal output part of single-chip microcomputer respectively with
The signal input part of DDS chips connects with the signal input part of LCD module；The signal output part of DDS chips passes through first resistor
It is connected with the negative input end of the first amplifier；The positive input terminal of first amplifier is grounded by second resistance；First amplifier
Output end is connected by the 7th resistance with the negative input end of the second amplifier；The positive input terminal of second amplifier passes through the 8th resistance
Ground connection；The output end of second amplifier is connected by the 12nd resistance with the positive input terminal of the 3rd amplifier；3rd amplifier
Negative input end passes through the 13rd resistance eutral grounding；The output end of 3rd amplifier passes through the 15th resistance and the base stage of NPN triode
Connection；The colelctor electrode of NPN triode is connected with the 3rd power end；On the one hand the emitter stage of NPN triode passes through the 14th resistance
It is connected with the signal input part of single-chip microcomputer, on the other hand passes sequentially through the 14th resistance, the 13rd resistance eutral grounding；
The negative electrode of Schottky diode and the base stage of NPN triode connect；The plus earth of Schottky diode；3rd electricity
Two fixing ends of resistance are connected with the negative input end and positive input terminal of the first amplifier respectively；One fixing end of the 5th resistance is led to
Cross the 4th resistance to be connected with the first power end, another fixing end is connected by the 6th resistance with second source end；5th resistance
Sliding end be connected by the 9th resistance with the negative input end of the second amplifier；One fixing end of the tenth resistance and the second amplification
The negative input end connection of device, the output end of another fixing end and sliding end with the second amplifier are connected；11st resistance
One end is connected with the output end of the second amplifier, other end ground connection；One end of 16th resistance and the positive input of the 3rd amplifier
End connection, the other end is as current mode detection signal output end；One end of 17th resistance and the emitter stage of NPN triode connect
Connect, the other end is connected with current mode detection signal output end；The both ends of the first electric capacity negative input end with the second amplifier respectively
Connected with output end；One end of second electric capacity is connected with the output end of the second amplifier, other end ground connection.
Specific work process is as follows：Single-chip microcomputer sends control instruction according to current operating state to DDS chips, so that
DDS chips export sine voltage signal.Sine voltage signal is first amplified through the first amplifier, then through the second amplifier
Adjustment is biased, is then filtered through the second electric capacity, most flows change-over circuit through pressure afterwards（Pressure stream change-over circuit is by the 3rd amplification
Device, Schottky diode, NPN triode, the 13rd to the 17th resistance are formed）Conversion generation current mode detection signal.Herein
During, voltage signal Real-time Feedback to single-chip microcomputer, the single-chip microcomputer of the negative input end of the 3rd amplifier first turns the voltage signal
Electric current is changed to, then by electric current compared with set-point, control instruction is then sent to DDS chips according to comparative result, thus
Adjust the frequency and amplitude of sine voltage signal.The working condition of single-chip microcomputer can be selected by Keysheet module.LCD module
Effect is the real-time frequency and amplitude of the current operating state and sine voltage signal that show single-chip microcomputer.Pass through 3rd resistor
The multiplication factor of the first amplifier can be adjusted.The effect of 4th resistance, the 5th resistance, the 6th resistance, the 9th resistance is for
Two amplifiers provide bias voltage.The effect of first electric capacity is active power filtering.
Based on said process, compared with traditional current mode detection signal generative circuit, one kind described in the utility model
The generative circuit of high precision electro flow pattern detection signal is by using brand-new closed loop configuration so that and the signal accuracy of generation is higher,
Thus the testing efficiency of current mode data collecting instrument greatly improved.
The utility model is rational in infrastructure, ingenious in design, efficiently solves traditional current mode detection signal generative circuit life
Into signal accuracy it is relatively low the problem of, suitable for the various tests of current mode data collecting instrument.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
A kind of generative circuit of high precision electro flow pattern detection signal, including single-chip microcomputer T1, Keysheet module T2, DDS chip T3,
LCD module T4, first to the 3rd amplifier AR1 ~ AR3, Schottky diode D, NPN triode Q, the first electric capacity C1, the second electricity
Hold C2, first to the 17th resistance R1 ~ R17, first to the 3rd power end VCC1 ~ VCC3；
Wherein, the first amplifier AR1 is instrumentation amplifier；Second amplifier AR2, the 3rd amplifier AR3 are that computing is put
Big device；3rd resistor R3, the 5th resistance R5, the tenth resistance R10 are adjustable resistance；
Single-chip microcomputer T1 signal input part is connected with Keysheet module T2 signal output part；Single-chip microcomputer T1 signal output part
It is connected respectively with DDS chips T3 signal input part and LCD module T4 signal input part；DDS chips T3 signal output part
It is connected by first resistor R1 with the first amplifier AR1 negative input end；First amplifier AR1 positive input terminal passes through the second electricity
Hinder R2 ground connection；First amplifier AR1 output end is connected by the 7th resistance R7 with the second amplifier AR2 negative input end；The
Two amplifier AR2 positive input terminal is grounded by the 8th resistance R8；Second amplifier AR2 output end passes through the 12nd resistance
R12 is connected with the 3rd amplifier AR3 positive input terminal；3rd amplifier AR3 negative input end is connect by the 13rd resistance R13
Ground；3rd amplifier AR3 output end is connected by the 15th resistance R15 with NPN triode Q base stage；NPN triode Q's
Colelctor electrode is connected with the 3rd power end VCC3；On the one hand NPN triode Q emitter stage passes through the 14th resistance R14 and single-chip microcomputer
T1 signal input part connection, on the other hand passes sequentially through the 14th resistance R14, the 13rd resistance R13 ground connection；
Schottky diode D negative electrode is connected with NPN triode Q base stage；Schottky diode D plus earth；The
Three resistance R3 two fixing ends are connected with the first amplifier AR1 negative input end and positive input terminal respectively；5th resistance R5's
One fixing end is connected by the 4th resistance R4 with the first power end VCC1, and another fixing end passes through the 6th resistance R6 and second
Power end VCC2 connections；5th resistance R5 sliding end is connected by the 9th resistance R9 with the second amplifier AR2 negative input end；
A tenth resistance R10 fixing end is connected with the second amplifier AR2 negative input end, another fixing end and sliding end with
Second amplifier AR2 output end connection；11st resistance R11 one end is connected with the second amplifier AR2 output end, another
End ground connection；16th resistance R16 one end is connected with the 3rd amplifier AR3 positive input terminal, and the other end detects as current mode
Signal output part IOUT；17th resistance R17 one end is connected with NPN triode Q emitter stage, and the other end detects with current mode
Signal output part IOUT connections；First electric capacity C1 both ends are connected with the second amplifier AR2 negative input end and output end respectively；
Second electric capacity C2 one end is connected with the second amplifier AR2 output end, other end ground connection.
When it is implemented, the single-chip microcomputer T1 is C8051F020 single-chip microcomputers.The DDS chips T3 is AD9833 DDS cores
Piece.The LCD module T4 is MZL02 LCD modules.The first amplifier AR1 is INA114 instrumentation amplifiers.Described second
Amplifier AR2, the 3rd amplifier AR3 are OP07 operational amplifiers.The NPN triode Q is 2N3904 NPN triodes.
Claims (7)
- A kind of 1. generative circuit of high precision electro flow pattern detection signal, it is characterised in that：Including single-chip microcomputer（T1）, Keysheet module （T2）, DDS chips（T3）, LCD module（T4）, the first to the 3rd amplifier（AR1~AR3）, Schottky diode（D）, NPN tri- Pole pipe（Q）, the first electric capacity（C1）, the second electric capacity（C2）, the first to the 17th resistance（R1~R17）, the first to the 3rd power end （VCC1~VCC3）；Wherein, the first amplifier（AR1）For instrumentation amplifier；Second amplifier（AR2）, the 3rd amplifier（AR3）It is computing Amplifier；3rd resistor（R3）, the 5th resistance（R5）, the tenth resistance（R10）It is adjustable resistance；Single-chip microcomputer（T1）Signal input part and Keysheet module（T2）Signal output part connection；Single-chip microcomputer（T1）Signal output End respectively with DDS chips（T3）Signal input part and LCD module（T4）Signal input part connection；DDS chips（T3）Letter Number output end passes through first resistor（R1）With the first amplifier（AR1）Negative input end connection；First amplifier（AR1）It is just defeated Enter end and pass through second resistance（R2）Ground connection；First amplifier（AR1）Output end pass through the 7th resistance（R7）With the second amplifier （AR2）Negative input end connection；Second amplifier（AR2）Positive input terminal pass through the 8th resistance（R8）Ground connection；Second amplifier （AR2）Output end pass through the 12nd resistance（R12）With the 3rd amplifier（AR3）Positive input terminal connection；3rd amplifier （AR3）Negative input end pass through the 13rd resistance（R13）Ground connection；3rd amplifier（AR3）Output end pass through the 15th resistance （R15）With NPN triode（Q）Base stage connection；NPN triode（Q）Colelctor electrode and the 3rd power end（VCC3）Connection；NPN Triode（Q）Emitter stage on the one hand pass through the 14th resistance（R14）With single-chip microcomputer（T1）Signal input part connection, the opposing party Face passes sequentially through the 14th resistance（R14）, the 13rd resistance（R13）Ground connection；Schottky diode（D）Negative electrode and NPN triode（Q）Base stage connection；Schottky diode（D）Plus earth； 3rd resistor（R3）Two fixing ends respectively with the first amplifier（AR1）Negative input end connected with positive input terminal；5th electricity Resistance（R5）A fixing end pass through the 4th resistance（R4）With the first power end（VCC1）Connection, another fixing end pass through the 6th Resistance（R6）With second source end（VCC2）Connection；5th resistance（R5）Sliding end pass through the 9th resistance（R9）With the second amplification Device（AR2）Negative input end connection；Tenth resistance（R10）A fixing end and the second amplifier（AR2）Negative input end connect Connect, another fixing end and sliding end with the second amplifier（AR2）Output end connection；11st resistance（R11）One end With the second amplifier（AR2）Output end connection, the other end ground connection；16th resistance（R16）One end and the 3rd amplifier （AR3）Positive input terminal connection, the other end is as current mode detection signal output end（IOUT）；17th resistance（R17）One End and NPN triode（Q）Emitter stage connection, the other end and current mode detection signal output end（IOUT）Connection；First electric capacity （C1）Both ends respectively with the second amplifier（AR2）Negative input end connected with output end；Second electric capacity（C2）One end and the Two amplifiers（AR2）Output end connection, the other end ground connection.
- A kind of 2. generative circuit of high precision electro flow pattern detection signal according to claim 1, it is characterised in that：The list Piece machine（T1）For C8051F020 single-chip microcomputers.
- A kind of 3. generative circuit of high precision electro flow pattern detection signal according to claim 1, it is characterised in that：It is described DDS chips（T3）For AD9833 DDS chips.
- A kind of 4. generative circuit of high precision electro flow pattern detection signal according to claim 1, it is characterised in that：It is described LCD module（T4）For MZL02 LCD modules.
- A kind of 5. generative circuit of high precision electro flow pattern detection signal according to claim 1, it is characterised in that：Described One amplifier（AR1）For INA114 instrumentation amplifiers.
- A kind of 6. generative circuit of high precision electro flow pattern detection signal according to claim 1, it is characterised in that：Described Two amplifiers（AR2）, the 3rd amplifier（AR3）It is OP07 operational amplifiers.
- A kind of 7. generative circuit of high precision electro flow pattern detection signal according to claim 1, it is characterised in that：It is described NPN triode（Q）For 2N3904 NPN triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720687641.8U CN206756915U (en) | 2017-06-14 | 2017-06-14 | A kind of generative circuit of high precision electro flow pattern detection signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720687641.8U CN206756915U (en) | 2017-06-14 | 2017-06-14 | A kind of generative circuit of high precision electro flow pattern detection signal |
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| Publication Number | Publication Date |
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| CN206756915U true CN206756915U (en) | 2017-12-15 |
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|---|---|---|---|
| CN201720687641.8U Expired - Fee Related CN206756915U (en) | 2017-06-14 | 2017-06-14 | A kind of generative circuit of high precision electro flow pattern detection signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122529A (en) * | 2020-09-10 | 2020-12-25 | 河北国智机械设备制造有限公司 | Intelligent cold header |
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2017
- 2017-06-14 CN CN201720687641.8U patent/CN206756915U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122529A (en) * | 2020-09-10 | 2020-12-25 | 河北国智机械设备制造有限公司 | Intelligent cold header |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20200614 |
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| CF01 | Termination of patent right due to non-payment of annual fee |