CN203299260U - Circuit capable of acquiring narrow pulse peak value - Google Patents
Circuit capable of acquiring narrow pulse peak value Download PDFInfo
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- CN203299260U CN203299260U CN2013202855147U CN201320285514U CN203299260U CN 203299260 U CN203299260 U CN 203299260U CN 2013202855147 U CN2013202855147 U CN 2013202855147U CN 201320285514 U CN201320285514 U CN 201320285514U CN 203299260 U CN203299260 U CN 203299260U
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- resistance
- narrow pulse
- operational amplifier
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Abstract
A circuit capable of acquiring narrow pulse peak value is connected with a circuit generating narrow pulse current signals. The circuit generating narrow pulse current signals is electrically connected with a sample hold circuit. The sample hold circuit is electrically connected with an operational amplification circuit. The operational amplification circuit is electrically connected with a discharge circuit. The discharge circuit is electrically connected with an MCU control circuit. The MCU control circuit is electrically connected with the discharge circuit. The discharge circuit is further electrically connected with the sample hold circuit. The narrow pulse current signals are locked on the positive ends of capacitors and an operational amplifier after passing through a diode. The emitter electrode of a triode is then closed to maintain a level. An original narrow pulse is converted into a long level. After the level is amplified, the MCU can conveniently acquire the level signal. The precise current value of an acquired current in a narrow pulse condition is thus guaranteed.
Description
Technical field
The utility model relates to a kind of burst pulse Acquisition Circuit, especially relates to a kind of brshless DC motor and is used for gathering the circuit of burst pulse peak value.
Background technology
In prior art, the size of phase current directly affect the various parameters that brshless DC motor is controlled, and because the size of phase current and the torque of motor are directly proportional, when when a lot of occasions require to realize permanent torque control, collection phase current size just seems particularly important.But, in the situation of the electric current that burst pulse occurs, gather very difficult that the phase current size becomes, cause the generation of following situation if gather the inaccurate meeting of phase current: the one, cause the deviser of motor to select the metal-oxide-semiconductor of wrong model, the metal-oxide-semiconductor long-term work easily damages in non-security district, thereby makes whole electrical fault; The 2nd, sample rate current gathers after ohmically voltage enters operational amplifier, is easy to cause sampling distortion in the very little situation of dutycycle, makes the excessive motor performance that affects of motor noise.
The utility model content
The purpose of this utility model, in order to overcome above-mentioned defect, provides a kind of circuit that accurately gathers current peak under burst pulse.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of circuit that can gather the burst pulse peak value, be electrically connected to the short duration current signal generating circuit, described short duration current signal generating circuit is electrically connected to sampling hold circuit, described sampling hold circuit is electrically connected to operational amplification circuit, described operational amplification circuit is electrically connected to discharge circuit, described discharge circuit is electrically connected to the MCU control circuit, and described MCU control circuit is electrically connected to discharge circuit, and described discharge circuit is electrically connected to described sampling hold circuit.
Described sampling hold circuit comprises diode, the first resistance and electric capacity, and an end of described the first resistance is connected with diode, its other end and Capacitance parallel connection, the other end ground connection of described electric capacity.
Described operational amplification circuit comprises resistance and operational amplifier, an input end of described operational amplifier is electrically connected to the first resistance in sampling hold circuit, described input end also is connected with positive source, another input end of described operational amplifier is by the second resistance eutral grounding, the output terminal of described operational amplifier is electrically connected to the MCU control circuit, and the 3rd resistance is connected across between the ground connection input end and output terminal of described operational amplifier.
Described discharge circuit comprises triode, the 4th resistance, the 5th resistance and electric capacity, the collector of described triode is electrically connected to the first resistance in sampling hold circuit, the grounded emitter of described triode, the base stage of described triode is electrically connected to the MCU control circuit by the 4th resistance, and the 5th resistance, electric capacity are connected across between the base stage and emitter of described triode.The utility model utilizes the short duration current signal to be latched at the anode of electric capacity and operational amplifier after diode, at this moment, transistor emitter is closed, Level hold is lived, make original burst pulse become a long level, after amplifying, MCU can collect this level signal easily, thereby has guaranteed to gather the precision current value of electric current under burst pulse.
Description of drawings
Fig. 1 is principle schematic of the present utility model.
Fig. 2 is physical circuit figure of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
The utility model is connected with short duration current signal generating circuit 1, described short duration current signal generating circuit is prior art, do not do and repeat at this, the utility model comprises sampling hold circuit 2, operational amplification circuit 3, discharge circuit 4 and MCU control circuit 5, the single-chip microcomputer model in the present embodiment in the MCU control circuit is STM8S105.Described maintenance sample circuit 2 comprises diode D1, resistance R 1 and capacitor C 1, and an end of described resistance is connected with diode D1, and its other end is in parallel with capacitor C 1, the other end ground connection of described electric capacity.
Described operational amplification circuit 3 comprises resistance R 2, R3 and operational amplifier U1, an input end c of described operational amplifier is electrically connected to the resistance R 1 in sampling hold circuit 2, described input end c also is connected with positive source, another input end b of described operational amplifier is by resistance R 2 ground connection, the output terminal a of described operational amplifier is electrically connected to MCU control circuit 5, and resistance R 3 is connected across a between the ground connection input end b of described operational amplifier and output terminal.
Described discharge circuit 4 comprises triode Q1, resistance R 4, R5 and capacitor C 2, the collector of described triode is electrically connected to the resistance R 1 in sampling hold circuit 2, the grounded emitter of described triode, the base stage of described triode is electrically connected to MCU control circuit 5 by resistance R 4, and resistance R 5 capacitor C 2 are connected across between the base stage and emitter of described triode.
When the short duration current signal out is latched at the anode c of C1 and operational amplifier UI from short duration current signal generating circuit 1 after diode D1, at this time triode Q1 closes, this moment, this level was held, become a long level by original burst pulse, can very easily gather this level signal by MCU controller after operational amplifier UI operation amplifier this moment.Gather after complete and open triode Q1 by putting resistance R 4 for high level, close again triode Q1 after the electric weight of capacitor C 1 is bled off, then etc. signals collecting next time.
Claims (4)
1. circuit that can gather the burst pulse peak value, be electrically connected to short duration current signal generating circuit (1), it is characterized in that described short duration current signal generating circuit (1) is electrically connected to sampling hold circuit (2), described sampling hold circuit is electrically connected to operational amplification circuit (3), described operational amplification circuit is electrically connected to discharge circuit (4), described discharge circuit is electrically connected to MCU control circuit (5), described MCU control circuit is electrically connected to discharge circuit (4), and described discharge circuit is electrically connected to described sampling hold circuit (2).
2. a kind of circuit that can gather the burst pulse peak value according to claim 1, it is characterized in that described sampling hold circuit (2) comprises diode (D1), resistance (R1) and electric capacity (C1), one end of described resistance is connected with diode (D1), its other end is in parallel with electric capacity (C1), the other end ground connection of described electric capacity.
3. according to claim 1 or 2 described a kind of circuit that can gather the burst pulse peak value, it is characterized in that described operational amplification circuit (3) comprises resistance (R2, R3) and operational amplifier (U1), an input end (c) of described operational amplifier is electrically connected to the resistance (R1) in sampling hold circuit (2), described input end (c) also is connected with positive source, another input end (b) of described operational amplifier is by resistance (R2) ground connection, the output terminal of described operational amplifier (a) is electrically connected to MCU control circuit (5), resistance (R3) is connected across between the ground connection input end (b) of described operational amplifier and output terminal (a).
4. according to claim 1 or 2 described a kind of circuit that can gather the burst pulse peak value, it is characterized in that described discharge circuit (4) comprises triode (Q1), resistance (R4, R5) and electric capacity (C2), the collector of described triode is electrically connected to the resistance (R1) in sampling hold circuit (2), the grounded emitter of described triode, the base stage of described triode is electrically connected to MCU control circuit (5) by resistance (R4), and resistance (R5), electric capacity (C2) are connected across between the base stage and emitter of described triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202855147U CN203299260U (en) | 2013-05-23 | 2013-05-23 | Circuit capable of acquiring narrow pulse peak value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202855147U CN203299260U (en) | 2013-05-23 | 2013-05-23 | Circuit capable of acquiring narrow pulse peak value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203299260U true CN203299260U (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202855147U Expired - Fee Related CN203299260U (en) | 2013-05-23 | 2013-05-23 | Circuit capable of acquiring narrow pulse peak value |
Country Status (1)
| Country | Link |
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| CN (1) | CN203299260U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255808A (en) * | 2017-07-13 | 2017-10-17 | 西安理工大学 | A kind of narrow pulse peak energy monitor of laser radar outgoing |
| CN107478899A (en) * | 2017-08-31 | 2017-12-15 | 苏州汇川技术有限公司 | A kind of burst pulse voltage sampling circuit and method |
| CN107561049A (en) * | 2017-09-05 | 2018-01-09 | 重庆民泰香料化工有限责任公司 | A kind of AFS peak sample circuit and control method |
| CN113899940A (en) * | 2021-08-24 | 2022-01-07 | 北京京医合符医药科技发展有限公司 | Acquisition and test circuit system for narrow pulse current |
-
2013
- 2013-05-23 CN CN2013202855147U patent/CN203299260U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255808A (en) * | 2017-07-13 | 2017-10-17 | 西安理工大学 | A kind of narrow pulse peak energy monitor of laser radar outgoing |
| CN107478899A (en) * | 2017-08-31 | 2017-12-15 | 苏州汇川技术有限公司 | A kind of burst pulse voltage sampling circuit and method |
| CN107478899B (en) * | 2017-08-31 | 2023-12-26 | 苏州汇川技术有限公司 | Narrow pulse voltage sampling circuit and method |
| CN107561049A (en) * | 2017-09-05 | 2018-01-09 | 重庆民泰香料化工有限责任公司 | A kind of AFS peak sample circuit and control method |
| CN113899940A (en) * | 2021-08-24 | 2022-01-07 | 北京京医合符医药科技发展有限公司 | Acquisition and test circuit system for narrow pulse current |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20160523 |