CN102064530A - Counting method by detecting current value variation of electromotor and counting sensor used thereby - Google Patents
Counting method by detecting current value variation of electromotor and counting sensor used thereby Download PDFInfo
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- CN102064530A CN102064530A CN2010105601444A CN201010560144A CN102064530A CN 102064530 A CN102064530 A CN 102064530A CN 2010105601444 A CN2010105601444 A CN 2010105601444A CN 201010560144 A CN201010560144 A CN 201010560144A CN 102064530 A CN102064530 A CN 102064530A
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Abstract
The invention discloses a counting method by detecting current value variation of an electromotor and a counting sensor used thereby. The counting method comprises the following steps: a sampling circuit samples the working current of the electromotor in real time and inputs the unitary sampling result into a processing circuit, and the processing circuit analyzes and respectively processes the sampling result. The counting sensor comprises the sampling circuit, the processing circuit and a power supply interface which are connected mutually, wherein the sampling circuit is connected with a current transformer, the processing circuit is respectively connected with a counter comparison circuit and a program writing port, and the counter comparison circuit is connected with a counting signal output interface. The invention has the advantages that the universality of application is widely expanded, the requirement for the installation environment is also expanded, a subsequent extension control function is obtained, and the like.
Description
Technical field
The present invention relates to sensor technical field, specifically is a kind ofly to change the method counted and the sensor for countering of use thereof by detecting motor current value.
Background technology
At present, in industrial quarters, the transducer that is used for doing counting mainly contains three kinds: 1, based on inductance or electric capacity operation principle near switch; 2, based on the optoelectronic switch of photoelectricity transformation principle; 3, based on the various touching switches of contact induction.In the process of industrial development, each transducer all has the range of application of oneself, and simultaneously, each transducer also all has the weakness of oneself, and for example: in reduced, distance of reaction also can diminish near switch, can not distinguish less arranged type object; Optoelectronic switch can not be installed on the serious plant equipment of on-the-spot greasy dirt, and cost is also very high; The problem of contact touching switch then is that the life-span is shorter.
Summary of the invention
One of purpose of the present invention is to provide a kind of and changes the method for counting by detecting motor current value, its electric current that utilizes motor is the principle that produces fluctuation with the motion of mechanical equipment, count by the current signal that detects fluctuation, can be to reciprocal acting, and the plant equipment that current value also has a fluctuation in acting is accurately counted.
Two of purpose of the present invention is to provide a kind of sensor for countering based on current detecting, and it can realize the purpose counted by the current fluctuation that detects motor, simple for structure rationally, the scope of application is extensive.
The present invention is achieved through the following technical solutions for achieving the above object: a kind of by detecting the method that the motor current value variation is counted, it is characterized in that: may further comprise the steps:
(1), sample circuit carries out real time sample to the motor operating current, simultaneously, obtains motor operating current fiducial value by sampling analysis repeatedly;
(2), the unitary sampling result is input to treatment circuit, compare with previous step gained fiducial value;
(3) if the comparing result of step (2) is the value requirement of sampled result coincidence counting numerical value, then sampled result being input to the counter comparison circuit screens, analyze by screening, mode intensity is effective if sampled result is the time, then export count signal, the counter received signal is counted; Mode intensity is invalid if analysis result is the time, and promptly sampled result is a jamming incoherent signal, and this sampled result is abandoned;
(4) if the comparing result of step (2) is a sampled result does not meet the value requirement of count value, and sampled result less than the N of fiducial value doubly, and N then directly abandons this sampled result greater than 1;
After step (2), can be provided with and step (3), step (4) step (5) arranged side by side, that is:
(5) if being sampled result, the comparing result of step (2) do not meet the value requirement of count value, and sampled result is greater than N times of fiducial value, then sampled result is input to the motor protection comparison circuit, the motor protection comparison circuit carries out the duration to sampled result and judges, if the duration of sampled result is greater than the count cycle, then send the motor protection signal, motor is protected operation to controlling alarm loop output port and Motor Control loop output port; If the duration of sampled result less than the count cycle, is then directly abandoned this sampled result.
N in the described step (5) doubly is 2 times.
A kind of by detecting the employed sensor for countering of method that the motor current value variation is counted based on current detecting, comprise interconnective sample circuit, treatment circuit and power interface, sample circuit is connected with current transformer, treatment circuit is write inbound port with counter comparison circuit, program respectively and is connected, and the counter comparison circuit is connected with the count signal output interface.
Described treatment circuit is connected with the motor protection comparison circuit, and the motor protection comparison circuit is connected with controlling alarm loop output port, Motor Control loop output port respectively.
Beneficial effect of the present invention is: can solve the deficiency that exists in the known technology, any sensor for countering in the prior art, all be the various phenomenon (magnetic that need to collect the Nature, sound,, heat, light etc.), the value of reordering, obtain an output, therefore its scope of application ubiquity restriction, the present invention has overcome many difficulties of sensor for countering in the past, the popularity that product is used has had very big expansion, so long as back and forth acting, and current value also has the plant equipment of fluctuation in acting, such as, the thread rolling machine of five metals industry the inside, heading machine, stamping machine, cutters etc. can accurately be counted and follow-up extension control with this transducer; Requirement to installation environment also has very big expansion, because be to detect current value, as long as motor power line passes this transducer, need not be exposed to the equipment appearance, is not subjected to the influence of dust and greasy dirt; Have function, can occur when unusual, report to the police automatically and carry out the motor protection operation, prevent that motor from damaging, guarantee the fail safe of producing etc. at motor to follow-up extension control.
Description of drawings
Accompanying drawing 1 is the structural representation of the sensor for countering based on current detecting of the present invention; Accompanying drawing 2 is flow charts of method of counting of the present invention.
Label shown in the accompanying drawing: 1, program is write inbound port; 2, treatment circuit; 3, counter comparison circuit; 4, count signal output interface; 5, sample circuit; 6, current transformer; 8, Motor Control loop output port; 9, controlling alarm loop output port; 10, motor protection comparison circuit.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
In the equipment of industrial product, a lot of machineries all are to use motor to do power resources, the electric current of its motor also is that the motion with mechanical equipment produces fluctuation, need only between fluctuate big and little and add a technical parameter, just can be used the current signal of fluctuation, count, this is the theoretical basis of supporting of the present invention.
Of the present invention a kind of by detecting the method that the motor current value variation is counted, may further comprise the steps:
(1), sample circuit carries out real time sample to the motor operating current, simultaneously, obtains motor operating current fiducial value by sampling analysis repeatedly, described fiducial value is stored in the treatment circuit;
(2), the unitary sampling result is input to treatment circuit, compare with previous step gained fiducial value;
(3) if the comparing result of step (2) is the value requirement of sampled result coincidence counting numerical value, then sampled result being input to the counter comparison circuit screens, analyze by screening, mode intensity is effective if sampled result is the time, then export count signal, the counter received signal is counted; Mode intensity is invalid if analysis result is the time, and promptly sampled result is a jamming incoherent signal, and this sampled result is directly abandoned;
(4) if the comparing result of step (2) is a sampled result does not meet the value requirement of count value, and sampled result less than the N of fiducial value doubly, and N then directly abandons this sampled result greater than 1;
The further technical scheme of the present invention is: in order to realize the protection to motor, preferably can be provided with after step (2) and step (3), step (4) step (5) arranged side by side, that is:
(5) if being sampled result, the comparing result of step (2) do not meet the value requirement of count value, and sampled result is greater than N times of fiducial value, then sampled result is input to the motor protection comparison circuit, the motor protection comparison circuit carries out the duration to sampled result and judges, if the duration of sampled result is greater than the count cycle, then send the motor protection signal to controlling alarm loop output port and Motor Control loop output port, motor is protected operation and sent alarm signal, prevent that motor from damaging, and improves the fail safe of producing; If the duration of sampled result less than the count cycle, is then directly abandoned this sampled result.
In step of the present invention (4); described N is doubly according to motor parameter; can be set at 1.5 times, 1.8 times, 3 times, 4 times etc.; its preferred plan is that described N doubly is preferably 2 times; under this numerical value situation; promptly be beneficial to and prevent misoperation, again can be accurately, timely motor is carried out real-time guard.
Of the present invention a kind of by detecting the employed sensor for countering of method that the motor current value variation is counted based on current detecting, agent structure comprises interconnective sample circuit 5, treatment circuit 2 and power interface, sample circuit 5 is connected with current transformer 6, with the motor of manufacturing machine wherein two power lines are through current transformers 6 time, the current signal of current transformer 6 in can the induction power supply line, and this signal is input to sample circuit 5 collects.Treatment circuit 2 can be analyzed and the signal of the different characteristic of analyzing is done the processing of different levels the real-time current value.Treatment circuit 2 writes port one with counter comparison circuit 3, program respectively and is connected, and counter comparison circuit 3 is connected with count signal output interface 4.Described count signal output interface 4 can with the shared interface of power interface, also can independently be provided with.
In the above-described embodiments; in order to realize the effect of real-time guard to motor; preferably treatment circuit 2 is connected with motor protection comparison circuit 10, motor protection comparison circuit 10 is connected with controlling alarm loop output port 9, Motor Control loop output port 8 respectively.
The present invention in use, as long as with wherein two power lines of the motor of manufacturing machine through current transformers 6, the present invention will intellectual analysis and is exported count signal.The size of transducer of the present invention is equal to or less than traditional mechanical type thermal relay, owing to considered the problem of motor protection aspect, can be used for replacing traditional thermal relay fully, does not take the distribution box space.
Claims (5)
1. one kind changes the method for counting by detecting motor current value, it is characterized in that: may further comprise the steps:
(1), sample circuit carries out real time sample to the motor operating current, simultaneously, obtains the operating current fiducial value of motor by sampling analysis repeatedly;
(2), the unitary sampling result is input to treatment circuit, compare with previous step gained fiducial value;
(3) if the comparing result of step (2) is the value requirement of sampled result coincidence counting numerical value, then sampled result being input to the counter comparison circuit screens, analyze by screening, mode intensity is effective if sampled result is the time, then export count signal, the counter received signal is counted; Mode intensity is invalid if analysis result is the time, and promptly sampled result is a jamming incoherent signal, and this sampled result is abandoned;
(4) if the comparing result of step (2) is a sampled result does not meet the value requirement of count value, and sampled result less than the N of fiducial value doubly, and N then directly abandons this sampled result greater than 1;
2. according to claim 1 a kind of by detecting the method that the motor current value variation is counted, it is characterized in that: after step (2), can be provided with and step (3), step (4) step (5) arranged side by side, that is:
(5) if being sampled result, the comparing result of step (2) do not meet the value requirement of count value, and sampled result is greater than N times of fiducial value, then sampled result is input to the motor protection comparison circuit, the motor protection comparison circuit carries out the duration to sampled result and judges, if the duration of sampled result is greater than the count cycle, then send the motor protection signal, motor is protected operation to controlling alarm loop output port and Motor Control loop output port; If the duration of sampled result less than the count cycle, is then directly abandoned this sampled result.
3. according to claim 2 a kind of by detecting the method that the motor current value variation is counted, it is characterized in that: the N in the described step (5) doubly is 2 times.
Claim 1-3 each describedly a kind ofly change employed sensor for countering of method of counting based on current detecting by detecting motor current value, it is characterized in that: comprise interconnective sample circuit (5), treatment circuit (2) and power interface, sample circuit (5) is connected with current transformer (6), treatment circuit (2) is write inbound port (1) with counter comparison circuit (3), program respectively and is connected, and counter comparison circuit (3) is connected with count signal output interface (4).
5. according to the described sensor for countering of claim 4 based on current detecting; it is characterized in that: treatment circuit (2) is connected with motor protection comparison circuit (10), and motor protection comparison circuit (10) is connected with controlling alarm loop output port (9), Motor Control loop output port (8) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105601444A CN102064530A (en) | 2010-11-26 | 2010-11-26 | Counting method by detecting current value variation of electromotor and counting sensor used thereby |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105601444A CN102064530A (en) | 2010-11-26 | 2010-11-26 | Counting method by detecting current value variation of electromotor and counting sensor used thereby |
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| CN2010105601444A Pending CN102064530A (en) | 2010-11-26 | 2010-11-26 | Counting method by detecting current value variation of electromotor and counting sensor used thereby |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112020903A (en) * | 2018-01-31 | 2020-12-01 | 伊顿智能动力有限公司 | Circuit breaker measurement structure for power distribution unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6464581A (en) * | 1987-09-03 | 1989-03-10 | Hioki Electric Works | Revolution counter for dc motor |
| US20060076913A1 (en) * | 2004-10-12 | 2006-04-13 | Rodrian James A | Method and apparatus for controlling a dc motor by counting current pulses |
| CN201368723Y (en) * | 2008-10-15 | 2009-12-23 | 王金友 | Revolution detecting circuit for brush type direct current motor, motor limiting device and motor |
-
2010
- 2010-11-26 CN CN2010105601444A patent/CN102064530A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6464581A (en) * | 1987-09-03 | 1989-03-10 | Hioki Electric Works | Revolution counter for dc motor |
| US20060076913A1 (en) * | 2004-10-12 | 2006-04-13 | Rodrian James A | Method and apparatus for controlling a dc motor by counting current pulses |
| CN201368723Y (en) * | 2008-10-15 | 2009-12-23 | 王金友 | Revolution detecting circuit for brush type direct current motor, motor limiting device and motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112020903A (en) * | 2018-01-31 | 2020-12-01 | 伊顿智能动力有限公司 | Circuit breaker measurement structure for power distribution unit |
| CN112020903B (en) * | 2018-01-31 | 2022-04-05 | 伊顿智能动力有限公司 | Circuit breaker measurement structure for power distribution unit |
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Application publication date: 20110518 |