CN202502164U - On-off inductance measuring device - Google Patents
On-off inductance measuring device Download PDFInfo
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- CN202502164U CN202502164U CN2012201748919U CN201220174891U CN202502164U CN 202502164 U CN202502164 U CN 202502164U CN 2012201748919 U CN2012201748919 U CN 2012201748919U CN 201220174891 U CN201220174891 U CN 201220174891U CN 202502164 U CN202502164 U CN 202502164U
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Abstract
An on-off inductance measuring device relates to an inductance measuring device, for solving the problems that the conventional general inductance measuring device only can measure the millihenry-level inductance, and the circuit of the inductance measuring device having a higher precision is complicated. The on-off inductance measuring device is characterized in that the power supply end of a current source is connected with the anode of a power supply, the current output end of the current source is connected with one end of an electronic switch circuit, and the other end of the electronic switch circuit is connected with the cathode of a first diode and the signal input end of a one-chip microcomputer control system simultaneously; the anode of the first diode is connected with the power ground of the power supply, the control signal output end of the one-chip microcomputer control system is connected with the switch control end of the electronic switch circuit, and the cathode and the anode of the first diode are the connection ends of a measured inductor. The on-off inductance measuring device is used to measure the inductance value of the inductor.
Description
Technical field
The utility model relates to a kind of inductance measurement device, particularly a kind of switching regulator inductance measurement device.
Background technology
The winding of inductance, mutual inductor, perceptual electrical equipment and motor is widely used in DC DC on-off circuit at present, and inductance type transducer all is to measure inductance value with the certain frequency sine-wave excitation, and the cost of measuring the small inductor value is than higher, and sensitivity is low.
In the prior art, adopt switching capacity to measure the method for capacitance and the technology very prosperity of related sensor, and the technology of the method for switched inductors inductance measuring value and related sensor is backward relatively.
At present common inductance measurement device can only measure the mH level, and the higher inductance measurement device cost of precision is than higher and complicated circuit.
The utility model content
The purpose of the utility model is that common inductance measurement device can only measure the mH level in order to solve at present, and the problem of the inductance measurement device complicated circuit that precision is higher provides a kind of switching regulator inductance measurement device.
The switching regulator inductance measurement device of the utility model, it comprises the current source and first diode, it also comprises electronic switching circuit and single-chip computer control system; The power supply end of current source connects the positive pole of power supply; The current output terminal of current source is connected with an end of electronic switching circuit; The other end of electronic switching circuit is connected with the negative electrode of first diode and the signal input part of single-chip computer control system simultaneously; The anode of first diode connects the power supply ground of power supply, and the control signal output ends of single-chip computer control system is connected with the switch control end of electronic switching circuit, and the negative electrode of first diode and anode are the link of tested inductance.
The advantage of the utility model is: circuit structure is simple, and cost is low.Can the inductance of inductance measuring value below 1000 μ H, when range was 1000 μ H, deviation was less than 10%; When range was 500 μ H, deviation was less than 3%.Effective resolution 0.2 μ H.
Description of drawings
Fig. 1 is the electrical block diagram of the device of the utility model.
Embodiment
Embodiment one: combine Fig. 1 that this embodiment is described, the switching regulator inductance measurement device of the utility model, it comprises the current source 1 and the first diode D1, it is characterized in that, it also comprises electronic switching circuit 2 and single-chip computer control system 3; The power supply end of current source 1 connects the positive pole of power supply; The current output terminal of current source 1 is connected with an end of electronic switching circuit 2; The other end of electronic switching circuit 2 is connected with the negative electrode of the first diode D1 and the signal input part of single-chip computer control system 3 simultaneously; The anode of the first diode D1 connects the power supply ground of power supply; The control signal output ends of single-chip computer control system 3 is connected with the switch control end of electronic switching circuit 2, and the negative electrode of the first diode D1 and anode are the link of tested inductance.
Closed electronic switching circuit 2, current source 1 be to tested induction charging, makes current i and the rated current I of current source 1 in the tested inductance
sEquate, and ψ=I is arranged
xI
sBreak off electronic switching circuit 2, the magnetic flux chain ψ=L of the storage in the inductor
xI
sPairing electromotive force is through diode D1 discharge, the tested inductive drop u of this moment
LEqual the pressure drop U of diode
DP, diode D1 is in when stablizing forward conduction, and tested inductive discharge electric current is linear decline, works as electric current I
sOne regularly, and the initial value of the discharge current of tested inductance is I
1When diode D1 one timing, the final value of the linear discharge current of tested inductance is I
2, and measure diode D1 and stablize forward conduction time t
DBecause the forward voltage U of diode
DP, inductor initial drain I
1With the final value electric current I
2Be constant, with the forward conduction time t of single-chip computer control system 3 timing measuring diode D1
DJust can inductance measuring value L
x, utilize formula
Ask inductance value L
x
The model of diode D1 is FR107.
Embodiment two: this embodiment is to the further specifying of embodiment one, the switching regulator inductance measurement device of the utility model, and current source 1 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, adjustable resistance VR1 and P channel MOS tube Q1;
One end of resistance R 1 and an end of resistance R 4 link together as the power supply end of current source 1; The other end of resistance R 1 connects stiff end and the sliding end of adjustable resistance VR1 of an end, the adjustable resistance VR1 of resistance R 2 simultaneously; The other end of resistance R 4 is connected with the source electrode of P channel MOS tube Q1; Another stiff end of adjustable resistance VR1 connects the other end of resistance R 2, the grid of P channel MOS tube Q1 and an end of resistance R 3 simultaneously; The power supply ground of another termination power supply of resistance R 3, the drain electrode of P channel MOS tube Q1 is the current output terminal of current source 1.
Embodiment three: this embodiment is to the further specifying of embodiment one, the switching regulator inductance measurement device of the utility model, and electronic switching circuit 2 comprises resistance R 5, resistance R 6 and N-channel MOS pipe Q2 and triode Q3;
The drain electrode of N-channel MOS pipe Q2 is connected with the current output terminal of current source 1 as an end of electronic switching circuit 2; The grid of N-channel MOS pipe Q2 is connected with an end of resistance R 5 and the collector of triode Q3 simultaneously; The positive pole of another termination power supply of resistance R 5; The base stage of triode Q3 is connected with an end of resistance R 6, and the emitter of triode Q3 connects the power supply ground of power supply; The source electrode of N-channel MOS pipe Q2 connects the negative electrode of the first diode D1 as the other end of electronic switching circuit 3, and the other end of resistance R 6 is switch control ends of electronic switching circuit 2.
Resistance R 5 is 1K, and resistance R 6 is 4.7K, and the model of N-channel MOS pipe Q2 is IR530,, triode Q3 is 9013.
Embodiment four: this embodiment is further specifying embodiment one; The switching regulator inductance measurement device of the utility model, single-chip computer control system 3 comprise ARM single-chip microcomputer, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, adjustable resistance VR2, one-level operational amplifier IC1, two-level operating amplifier IC2, Sheffer stroke gate IC3 and the second diode D2;
One end of the negative electrode of the first diode D1 and resistance R 7 is connected; The other end of resistance R 7 is connected with the forward signal input end of one-level operational amplifier IC1; The reverse signal input end of one-level operational amplifier IC1 is connected with an end of resistance R 8 and an end of resistance R 9 simultaneously; The power supply ground of another termination power supply of resistance R 9; The other end of resistance R 8 is connected with the signal output part of one-level operational amplifier IC1 and the reverse signal input end of two-level operating amplifier IC2 simultaneously; The forward signal input end of two-level operating amplifier IC2 is connected with the sliding end of adjustable resistance VR2, one of the adjustable resistance VR2 fixing power supply ground of termination power supply, another of adjustable resistance VR2 fixedly the termination power supply negative pole; The signal output part of two-level operating amplifier IC2 is connected with an end of resistance R 10; The other end of resistance R 10 is connected with the negative electrode of the second diode D2, input end of an end and Sheffer stroke gate IC3 of resistance R 11 simultaneously, and the anode of the other end of resistance R 11 and the second diode D2 connects the power supply ground of power supply simultaneously, and another input end of Sheffer stroke gate IC3 is connected with the signal output part of ARM single-chip microcomputer; The output terminal of Sheffer stroke gate IC3 is connected with the signal input part of ARM single-chip microcomputer, and the signal output part of ARM single-chip microcomputer is the signal output part of single-chip computer control system 3 and is connected with the switch control end of electronic switching circuit 2.
Resistance R 7 is 10K, and resistance R 8 is 100K, and resistance R 9 is 10K, and resistance R 10 is 4.7K, and resistance R 11 is 10K for 4.7K, variable resistor VR2, and the model of Sheffer stroke gate is that the model of 74HC00 and diode D2 is IN4148.
Constant-current source circuit is by Q
1And resistance R 1-R4 composition, it is Is=100mA that adjusting VR1 makes continuous current.Q2 and D1 constitute complementary charge and discharge switch.IC1, IC2 adopt amplifier TL082, ± 12V power supply.R10, R11 and D2 realize ± 10 to 0, the level conversion of 5V.When IC3 blocks charging, the voltage u of tested inductance
LSignal during=-0.8V passes through.The ARM single-chip microcomputer is a minimum system plate, and the band button shows and basic I/O interface function, can regularly measure Sheffer stroke gate IC3 output signal u easily
oLow level time t
DSignal u
TBe the control signal of single-chip computer control system 3 outputs, cycle and dutycycle can be adjusted arbitrarily.
Before the test job, the control signal u that earlier single-chip computer control system 3 is exported
TCycle be transferred to 1ms, dutycycle is 0.5.Let and also can discharge and recharge fully when measuring maximum induction.The control signal u of single-chip computer control system 3 outputs
TWhen low, tested inductance L x charging is given in the Q2 conducting, and blocks output signal u simultaneously
2, do not allow the signal in charging period to pass through.The control signal u of single-chip computer control system 3 outputs
TWhen high, Q2 ends, and Lx discharges through D1.Voltage signal u
LCompare through IC1 amplification, IC2, and by the control signal u of single-chip computer control system 3 outputs
TAllow through IC3, as not gate IC3 output signal u
oSignal gets into single-chip microcomputer.Inductance is in discharge process; Beginning can puncture the D1 stable discharging, when energy is not enough, can not puncture PN junction, and constitutes the damped oscillation waveform with the junction capacity of PN junction; Finish until magnetic field energy release; VR2 is provided with pact-6V, can discern-0.8V, and avoiding next time again, the peak value of antihunt signal gets into again.
Tested inductance L x gets the inductance between the 21 μ H-1000 μ H during test, and the nominal inductance value was proofreaied and correct with electric bridge, and partial inductance superposes with series system.These inductance adopt the utility model respectively, and it is as shown in table 1 to read the corresponding N value.With the match of MATLAB software, get L to these data
x=0.1315N-4.7504, consider that deviation greater than this precision in expression, is reduced to linear relation:
L
x=0.13N-5 unit: μ H (1)
The data of table 1Lx and N are right
(1) absolute deviation Err=L (the N)-Lx of the calculated value L (N) of formula and true value, when Lx＜580 μ H, deviation is less than 15 μ H.
The deviation of upper end is near 100 μ H.If the full scale by 1000 μ H is calculated, relative error is better than 10%.
The calculated value of table 2Lx and the absolute deviation of true value
| L(N) | Lx | Err | L | Lx | Err | L | Lx | Err | L | Lx | Err |
| (μH) | (N) | (μH) | (N) | (μH) | (N) | ?(μH) | |||||
| 16.8 | 21 | -4.2 | 225.6 | 222 | 3.6 | 586.5 | 582 | 4.5 | 892.5 | 900 | -7.5 |
| 47.6 | 47 | 0.6 | 322.5 | 314 | 8.5 | 667.2 | 628 | 39.2 | 1035.5 | 942 | 93.5 |
| 108.4 | 106 | 2.4 | 337.6 | 328 | 9.5 | 722.4 | 680 | 42.3 | 1070.1 | 994 | 76.1 |
| 110.2 | 112 | -1.8 | 437.7 | 426 | 11.6 | 733.9 | 740 | -6.1 | 1021.4 | 1000 | -1.65 |
| 135.7 | 150 | -14.3 | 478.9 | 470 | 8.9 | 827.3 | 792 | 35.2 |
Claims (4)
1. switching regulator inductance measurement device, it comprises current source (1) and first diode (D1), it is characterized in that, it also comprises electronic switching circuit (2) and single-chip computer control system (3); The power supply end of current source (1) connects the positive pole of power supply; The current output terminal of current source (1) is connected with an end of electronic switching circuit (2); The other end of electronic switching circuit (2) is connected with the negative electrode of first diode (D1) and the signal input part of single-chip computer control system (3) simultaneously; The anode of first diode (D1) connects the power supply ground of power supply; The control signal output ends of single-chip computer control system (3) is connected with the switch control end of electronic switching circuit (2), and the negative electrode of first diode (D1) and anode are the link of tested inductor.
2. switching regulator inductance measurement device according to claim 1 is characterized in that, current source (1) comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, adjustable resistance VR1 and P channel MOS tube (Q1);
One end of resistance R 1 and an end of resistance R 4 link together as the power supply end of current source (1); The other end of resistance R 1 connects stiff end and the sliding end of adjustable resistance VR1 of an end, the adjustable resistance VR1 of resistance R 2 simultaneously; The other end of resistance R 4 is connected with the source electrode of P channel MOS tube (Q1); Another stiff end of adjustable resistance VR1 connects the other end of resistance R 2, the grid of P channel MOS tube (Q1) and an end of resistance R 3 simultaneously; The power supply ground of another termination power supply of resistance R 3, the drain electrode of P channel MOS tube (Q1) is the current output terminal of current source (1).
3. switching regulator inductance measurement device according to claim 1 is characterized in that, electronic switching circuit (2) comprises resistance R 5, resistance R 6 and N-channel MOS pipe (Q2) and triode (Q3);
The drain electrode of N-channel MOS pipe (Q2) is connected with the current output terminal of current source (1) as an end of electronic switching circuit (2); The grid of N-channel MOS pipe (Q2) is connected with an end of resistance R 5 and the collector of triode (Q3) simultaneously; The positive pole of another termination power supply of resistance R 5; The base stage of triode Q3 is connected with an end of resistance R 6, and the emitter of triode (Q3) connects the power supply ground of power supply; The source electrode of N-channel MOS pipe (Q2) connects the negative electrode of first diode (D1) as the other end of electronic switching circuit (2), and the other end of resistance R 6 is switch control ends of electronic switching circuit (2).
4. switching regulator inductance measurement device according to claim 1; It is characterized in that single-chip computer control system (3) comprises ARM single-chip microcomputer, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, adjustable resistance VR2, one-level operational amplifier (IC1), two-level operating amplifier (IC2), Sheffer stroke gate (IC3) and second diode (D2);
The negative electrode of first diode (D1) is connected with an end of resistance R 7; The other end of resistance R 7 is connected with the forward signal input end of one-level operational amplifier (IC1); The reverse signal input end of one-level operational amplifier (IC1) is connected with an end of resistance R 8 and an end of resistance R 9 simultaneously; The power supply ground of another termination power supply of resistance R 9; The other end of resistance R 8 is connected with the signal output part of one-level operational amplifier (IC1) and the reverse signal input end of two-level operating amplifier (IC2) simultaneously; The forward signal input end of two-level operating amplifier (IC2) is connected with the sliding end of adjustable resistance VR2; One of the adjustable resistance VR2 fixing power supply ground of termination power supply; Another of adjustable resistance VR2 fixedly the termination power supply negative pole, the signal output part of two-level operating amplifier (IC2) is connected with an end of resistance R 10, the other end of resistance R 10 is connected with the negative electrode of second diode (D2), input end of an end and Sheffer stroke gate (IC3) of resistance R 11 simultaneously; The anode of the other end of resistance R 11 and second diode (D2) connects the power supply ground of power supply simultaneously; Another input end of Sheffer stroke gate (IC3) is connected with the signal output part of ARM single-chip microcomputer, and the output terminal of Sheffer stroke gate (IC3) is connected with the signal input part of ARM single-chip microcomputer, and the signal output part of ARM single-chip microcomputer is the signal output part of single-chip computer control system (3) and is connected with the switch control end of electronic switching circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201748919U CN202502164U (en) | 2012-04-23 | 2012-04-23 | On-off inductance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201748919U CN202502164U (en) | 2012-04-23 | 2012-04-23 | On-off inductance measuring device |
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| CN202502164U true CN202502164U (en) | 2012-10-24 |
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| CN2012201748919U Expired - Fee Related CN202502164U (en) | 2012-04-23 | 2012-04-23 | On-off inductance measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103134994A (en) * | 2013-01-29 | 2013-06-05 | 上海电气集团股份有限公司 | Testing circuit based on double level laminated busbar random induction and method thereof |
| CN103954844A (en) * | 2014-04-11 | 2014-07-30 | 西南交通大学 | Online detection method of inductance parameters of suspension electromagnet of middle and low speed magnetic-levitation train |
| CN105388364A (en) * | 2015-11-03 | 2016-03-09 | 新乡学院 | Inductance measurement circuit |
| CN107526033A (en) * | 2017-09-30 | 2017-12-29 | 衢州学院 | A kind of high-precision switching regulator electric inductance measuring-testing instrument |
| CN110656408A (en) * | 2019-10-18 | 2020-01-07 | 杭州吉谦智能装备有限公司 | Yarn broken end feeding stopping signal control device of spinning frame |
| CN113156217A (en) * | 2021-04-25 | 2021-07-23 | 山东交通学院 | Measuring device and method for hollow large inductor |
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2012
- 2012-04-23 CN CN2012201748919U patent/CN202502164U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134994A (en) * | 2013-01-29 | 2013-06-05 | 上海电气集团股份有限公司 | Testing circuit based on double level laminated busbar random induction and method thereof |
| CN103954844A (en) * | 2014-04-11 | 2014-07-30 | 西南交通大学 | Online detection method of inductance parameters of suspension electromagnet of middle and low speed magnetic-levitation train |
| CN105388364A (en) * | 2015-11-03 | 2016-03-09 | 新乡学院 | Inductance measurement circuit |
| CN107526033A (en) * | 2017-09-30 | 2017-12-29 | 衢州学院 | A kind of high-precision switching regulator electric inductance measuring-testing instrument |
| CN107526033B (en) * | 2017-09-30 | 2023-09-08 | 衢州学院 | High-precision switch type inductance tester |
| CN110656408A (en) * | 2019-10-18 | 2020-01-07 | 杭州吉谦智能装备有限公司 | Yarn broken end feeding stopping signal control device of spinning frame |
| CN113156217A (en) * | 2021-04-25 | 2021-07-23 | 山东交通学院 | Measuring device and method for hollow large inductor |
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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: 20121024 Termination date: 20150423 |
|
| EXPY | Termination of patent right or utility model |