CN205844487U - Be hampered testing circuit - Google Patents
Be hampered testing circuit Download PDFInfo
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- CN205844487U CN205844487U CN201620563965.6U CN201620563965U CN205844487U CN 205844487 U CN205844487 U CN 205844487U CN 201620563965 U CN201620563965 U CN 201620563965U CN 205844487 U CN205844487 U CN 205844487U
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- motor
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- current
- testing circuit
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Abstract
Be hampered testing circuit, including motor, motor has motor Backward Function, including motor path, motor paths connected in series resistance, resistance two ends are provided with voltage monitoring device, and voltage monitoring device is in series with the double operational amplification circuit of LM358, and the magnitude of voltage amplified through the double operational amplification circuit of LM358 delivers to Chip Microcomputer A/D C input.This utility model has the advantages that and solves the problem all can be able to reported to the police when motor is opened and motor is hampered in prior art, the only alarm when motor is hampered, and is greatly reduced the judgement time, reduces the probability that motor is burned out.
Description
Technical field
The invention belongs to machine field, be specifically related to the testing circuit that is hampered.
Background technology
When motor normally starts electric current can present first rise decline afterwards the most again rise and such spy of finally tending to be steady
Property, then presenting electric current when motor is hampered persistently is substantially increased such trend, and mathematically describing is exactly that motor normally opens
Time dynamic, derivative of current is not monotone variation；And the derivative of current that motor is when being hampered is monotone variation, over-current and-load is protected
Refer to that motor operating current needs when exceeding certain limit value to cut off motor power, it is ensured that motor is not burned out infringement；Be hampered rollback
Function refers in motor operation course, table top top to or arrived to barrier, system can detect in time and issue simultaneously
Motor back-off instruction, the routine Backward Function that is hampered is to realize by setting fixing operating current thresholding, changes electric machine rotation
Direction, it is ensured that system and property safety, i.e. when the electric current monitored is up to or over this thresholding, identification is hampered, this side
Formula is the most ageing, and generally until alarm, motor has been burned, and loses huge slowly, on the other hand is very easy to cause
Cause false alarm when start every time, cause the error of workman to judge, be mistakenly considered to run into resistance, take the investigation time, impact
Work efficiency.
Summary of the invention
For deficiency of the prior art, the present invention provides the testing circuit that is hampered, solves existing motor normal boot-strap
Time can cause false alarm, be hampered detection ageing slow problem.
The present invention is achieved through the following technical solutions.
Be hampered testing circuit, and including motor, described motor has motor Backward Function, including motor path, described
Motor paths connected in series resistance, described resistance two ends are provided with voltage monitoring device, and described voltage monitoring device is in series with
The double operational amplification circuit of LM358, the magnitude of voltage amplified through the double operational amplification circuit of LM358 delivers to Chip Microcomputer A/D C input.
As preferably, described motor being provided with siren, described siren is connected with Chip Microcomputer A/D C outfan
Connect.Siren plays the effect of prompting in time, prevents infringement from strengthening.
Compared with prior art: solving can be asking that motor unlatching and motor all can be reported to the police when being hampered in prior art
Topic, the only alarm when motor is hampered, and it is greatly reduced the judgement time, reduce the probability that motor is burned out.
Accompanying drawing explanation
Fig. 1 is the start of the present invention and the current characteristics figure being hampered.
Fig. 2 is the circuit diagram of the motor paths connected in series resistance of the present invention.
Fig. 3 is the structural representation that the resistance of the present invention is connected with other modules.
Fig. 4 is the flow chart of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings with detailed description of the invention, the present invention is described further.
Be hampered testing circuit, and including motor, described motor has motor Backward Function, including motor path, described
Motor paths connected in series resistance, described resistance two ends are provided with voltage monitoring device, and described voltage monitoring device is in series with
The double operational amplification circuit of LM358, the magnitude of voltage amplified through the double operational amplification circuit of LM358 delivers to Chip Microcomputer A/D C input, institute
Being provided with siren on the motor stated, described siren is connected with Chip Microcomputer A/D C outfan, comprises the following steps,
A) current ripple level XmA is set；
Electric current when B) initially opening with Chip Microcomputer A/D C sample motor, makes matched curve；
C) curve data is carried out calculus process, find out the peak value of curve；
D) using this peak value as reference current value, this reference current value is multiplied by resistance, basis of formation magnitude of voltage；
E) this pedestal voltage value magnitude of voltage of through LM358 double operational amplification circuit amplifying follow-up with Chip Microcomputer A/D C is carried out
Relatively；
F) subsequent acquisition time interval is set as the Y second；
G) current ripple level XmA is differed by more than when the magnitude of voltage detected in the Y second and reference voltage value, then it is assumed that run into obstacle
Thing, controller provides motor back-off instruction；When in the Y second, the magnitude of voltage of detection and reference voltage value are more or less the same in current ripple level
XmA, then it is assumed that normal, returns F step and continues to gather.
The smoothing processing that the magnitude of voltage monitored repeatedly is averaged, described current ripple level XmA is set as
300mA, subsequent detection time interval is 15ms.
In Fig. 2, X1 to X2 region is motor electric current special curve when normally starting, and X2 to X3 is motor electricity when being hampered
Properties of flow.
The routine Backward Function that is hampered is to realize by setting fixing operating current thresholding, i.e. reaches when the electric current monitored
To or when exceeding this thresholding, identification is hampered；And the monitoring scheme of the present invention is the instantaneous variation characteristic by comparison electric current.This
Depending on the operating characteristic of current of electric, when motor normally starts, electric current can present first to rise to decline afterwards and rises and final the most again
Tend to be steady such characteristic, then presents electric current when motor is hampered and is persistently substantially increased such trend.
Take into account the sensitivity of the detection that is hampered for effectively protection motor, we exceed by the current ripple level when motor is hampered simultaneously
Open backtracking function during 300mA, the most effectively determine that the datum mark that current value size compares is key issue, such as at the beginning of
Primordium is selected in the interval that motor normally starts on schedule can produce false alarm, and i.e. system is it needs to be determined that the phenomenon that electric current persistently rises is
Occur normally to start this period at motor and still running into the barrier period.
The electric current worked by real-time sampling motor, is i.e. differentiated by the derivation of curve simulated to sample rate current
Finding out the peak value first of electric current when motor normally starts, the current fitting curve Derivative Operation value that this peak point is corresponding is zero, looks for
Going out the current minimum after this peak value as current ratio relatively datum mark, peak value is multiplied by resistance successively, in the present embodiment
Resistance is 0.02 Ω, basis of formation magnitude of voltage, and the magnitude of voltage amplified through the double operational amplification circuit of LM358 delivers to Chip Microcomputer A/D C
Input, the magnitude of voltage that follow-up Chip Microcomputer A/D C detects compares in real time with this reference voltage value, between each detection time
It is divided into 15ms, once present current value and the deviation of reference value > 300mA, i.e. thinks that current system encounters barrier, controls
Device needs to provide motor back-off instruction and guarantees system and the property safety of outside barrier.
In reality is tested, the pedestal voltage value of the detection that is hampered is as table top and bears the adjustment of heavy burden and adjust change
, namely the different corresponding different pedestal voltage value of load level: the setting of pedestal voltage value is individual with load change level
Piecewise function, this is based on such a fundamemtal phenomena, and load level is the heaviest, and corresponding current fluctuation scope is the biggest, this
Sample can fully ensure that the mistake alarm that motor is not hampered when load level is relatively low, guarantees system at load level relatively simultaneously
The detection that is hampered time high possesses suitable sensitivity, and the acquisition of this functional relationship derives from DCO and comparing, plan
Close.
Protection scope of the present invention includes but not limited to embodiment of above, and protection scope of the present invention is with claims
It is as the criterion, replacement that any those skilled in the art making this technology is readily apparent that, deforms, improve and each fall within the present invention's
Protection domain.
Claims (2)
1. be hampered testing circuit, and including motor, described motor has motor Backward Function, it is characterised in that includes that motor leads to
Road, described motor paths connected in series resistance, described resistance two ends are provided with voltage monitoring device, described voltage monitoring device
Being in series with the double operational amplification circuit of LM358, it is defeated that the magnitude of voltage through LM358 double operational amplification circuit amplification delivers to Chip Microcomputer A/D C
Enter end.
The testing circuit that is hampered the most according to claim 1, it is characterised in that be provided with siren, institute on described motor
The siren stated is connected with Chip Microcomputer A/D C outfan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620563965.6U CN205844487U (en) | 2016-06-13 | 2016-06-13 | Be hampered testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620563965.6U CN205844487U (en) | 2016-06-13 | 2016-06-13 | Be hampered testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844487U true CN205844487U (en) | 2016-12-28 |
Family
ID=58153971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620563965.6U Active CN205844487U (en) | 2016-06-13 | 2016-06-13 | Be hampered testing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205844487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124983A (en) * | 2016-06-13 | 2016-11-16 | 宁波强生电机有限公司 | Be hampered testing circuit and the detection method that is hampered |
-
2016
- 2016-06-13 CN CN201620563965.6U patent/CN205844487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124983A (en) * | 2016-06-13 | 2016-11-16 | 宁波强生电机有限公司 | Be hampered testing circuit and the detection method that is hampered |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |