CN102176174B - Speed regulating system and control method thereof for potentiometer - Google Patents
Speed regulating system and control method thereof for potentiometer Download PDFInfo
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- CN102176174B CN102176174B CN2011100606183A CN201110060618A CN102176174B CN 102176174 B CN102176174 B CN 102176174B CN 2011100606183 A CN2011100606183 A CN 2011100606183A CN 201110060618 A CN201110060618 A CN 201110060618A CN 102176174 B CN102176174 B CN 102176174B
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- signal
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- potentiometer
- control
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Abstract
The invention provides a speed regulating system and a control method thereof for a potentiometer. The system comprises a signal control module comprising a signal reading module, a calculating and comparing module, a signal conditioning module and an execution module, wherein the signal control module is used for adjusting a control signal output to a servo motor system according to the change of a voltage sampling value of the potentiometer and controlling the signal by adopting a PI (Proportional) algorithm. The method provided by the invention is a control method of the system. Compared with the prior art, the invention has the benefits that signal ripple can be effectively inhibited, and thereby the rotating speed of a controlled motor is prevented from fluctuating in an instable way to cause the damage of the motor.
Description
Technical field
The present invention relates to the Electromechanical Control field, particularly relate to a kind of potentiometer governing system and control method thereof.
Background technology
At present; Mode of speed regulation on the plant equipment mainly comprises two kinds: most equipment is through rotating speed is set on touch-screen; This mode of speed regulation is unfavorable for realizing stepless speed regulation, and operating personnel's operation is also extremely inconvenient, for example: if each speed-raising amount is 10 rev/mins; Then speed is mentioned 100 rev/mins from 0, need carry out 10 operations; Few equipment component then adopts the potentiometer speed governing; The servo electrical machinery system of plant equipment receives the control signal of potentiometer and carries out speed governing according to this control signal, but prior art all do not handle the control signal of potentiometer output, owing to receive the influence that signal disturbs in precision and the signals transmission of potentiometer; The control signal of potentiometer output has bigger ripple; Thereby cause motor speed uncertain fluctuation to occur, add the service wear of speed motor, reduced the serviceable life of motor.
Summary of the invention
Technical matters to be solved by this invention is, a kind of control method of potentiometer speed governing is provided and realizes the potentiometer governing system of this method, eliminates the signal ripple in the potentiometer speed regulation process.
Technical problem of the present invention solves by the following technical programs:
A kind of potentiometer governing system comprises the signal controlling module, and the input end of this signal controlling module is connected with the output terminal of potentiometer, and the output terminal of signal controlling module is connected with the signal input end of private clothes electric system;
Said signal controlling module comprises:
Signal reading module is used for the current sample voltage value V of reading potential device
nWith the preceding once sample voltage value V of sampling
N-1
Calculate and comparison module, be used to calculate said V
nAnd V
N-1Poor Δ V
n=V
n-V
N-1, and more said Δ V
nSize with preset threshold value Δ V;
Signal-adjusting module is used for carrying out Signal Regulation according to the comparative result of said calculating and comparison module, when-Δ V<Δ V
n<during Δ V, keep V
nBe worth constant; As Δ V
n<during-Δ V, upgrade V
n=V
N-1-V
mAs Δ V
n>During Δ V, upgrade V
n=V
N-1+ V
mSaid V
mBe preset potentiometer regulated value;
Execution module is used for the Signal Regulation result according to signal-adjusting module, the output signal V of control signal control module
OUT=V
nAnd upgrade said V
N-1=V
n
A kind of control method of potentiometer speed governing may further comprise the steps:
1) the current sample voltage value V of reading potential device
nWith the preceding once sample voltage value V of sampling
N-1
2) calculate said V
nAnd V
N-1Poor Δ V
n=V
n-V
N-1
3) more said Δ V
nWith the size of preset threshold value Δ V, when-Δ V<Δ V
n<during Δ V, keep V
nBe worth constant; As Δ V
n<during-Δ V, upgrade V
n=V
N-1-V
mAs Δ V
n>During Δ V, upgrade V
n=V
N-1+ V
mSaid V
mBe preset potentiometer regulated value;
4) the output signal V of control signal control module
OUT=V
nUpgrade said V
N-1=V
n
The beneficial effect of the present invention and prior art contrast is: control system of the present invention and control method are through exporting the adjustment of the control signal of servo electrical machinery system to potentiometer; Can suppress the signal ripple effectively, thereby prevent controlled rotating speed of motor erratic fluctuations, damage motor; And when needs control motor quickens or slows down; Through the PI control algolithm, the control motor progressively quickens or slows down, thereby has avoided the motor speed sudden change to damage motor.
Description of drawings
Fig. 1 is potentiometer governing system and the potentiometer and the servo electrical machinery system annexation synoptic diagram of the specific embodiment of the invention;
Fig. 2 is the annexation synoptic diagram of Fig. 1 potentiometer and PLC;
Fig. 3 is the control flow chart of the potentiometer governing system of the specific embodiment of the invention.
Embodiment
Contrast accompanying drawing below and combine preferred embodiment that the present invention is carried out detailed elaboration.
As shown in Figure 1, the potentiometer governing system of this embodiment comprises a signal controlling module; This signal controlling module is located between the potentiometer and servo electrical machinery system of existing potentiometer arrangements for speed regulation, is used to regulate the control signal that is exported to servo electrical machinery system by potentiometer.
Said signal controlling module comprises:
Signal reading module is used for the sample voltage value of reading potential device;
Calculate and comparison module, be used to calculate said V
nAnd V
N-1Poor Δ V
n=V
n-V
N-1, and more said Δ V
nSize with preset threshold value Δ V;
Signal-adjusting module is used for carrying out Signal Regulation according to the comparative result of said calculating and comparison module;
Execution module is used for the Signal Regulation result according to signal-adjusting module, the output signal V of control signal control module
OUT=V
nAnd upgrade said V
N-1=V
n
It is the programmable logic controller (PLC) (PLC) of Q64AD that the signal controlling module of this embodiment adopts the Mitsubishi model; As shown in Figure 2; The voltage analog input end of said PLC is connected with potentiometer; That is, the V+ terminal of the said PLC of slip termination of potentiometer, the V ﹣ terminal of the said PLC of R termination of potentiometer; The SLD terminal of PLC connects shielding line; The output terminal of PLC is connected with the servo electrical machinery system signal input end.
The adjusting flow process and the principle of work of the signal controlling module of 3 pairs of present embodiments of contrast accompanying drawing are described in detail below:
When said potentiometer arrangements for speed regulation moved, potentiometer was at interval the voltage with sampled point to be inputed to said PLC with the regular hour, and the size of this voltage is directly proportional with rotating speed of motor, stores preset threshold value Δ V and potentiometer regulated value V among this PLC
mThe said threshold value Δ V dead band that in engineering, is otherwise known as; The size of Δ V needs confirm according to two factors: total signal fluctuation value range that interference produced that the first receives in transport process because of the precision and the signal thereof of potentiometer; It two is fluctuation patterns of this signal, and in general the size of Δ V should be set between 2 ~ 3 times of fluctuation range value; Potentiometer regulated value V
mBe used to control the amount that the control signal of PLC output increases at every turn or reduces, and finally control the speed regulation value of the each speed governing of controlled motor; PLC carries out following steps successively in the operational process:
1) the current sample voltage value V of signal reading module reading potential device
nWith the preceding once sample voltage value V of sampling
N-1Because the PLC of present embodiment has comprised analog-to-digital conversion module, sample voltage value V
nAnd V
N-1All be meant the size of the digital signal after analog to digital conversion, but in the practice, the potentiometer analog signal conversion becomes digital signal also can be accomplished by analog-to-digital conversion module independently, signal reading module directly reads the digital value of this analog-to-digital conversion module output;
2) calculating is calculated said V with comparison module
nAnd V
N-1Poor Δ V
n=V
n-V
N-1And more said Δ V
nWith the size of preset threshold value Δ V;
3) signal-adjusting module is carried out Signal Regulation according to the comparative result that calculates with comparison module: when-Δ V<Δ V
n<during Δ V, keep V
nBe worth constant; As Δ V
n<during-Δ V, upgrade V
n=V
N-1-V
mAs Δ V
n>During Δ V, upgrade V
n=V
N-1+ V
mSaid V
mBe preset potentiometer regulated value;
4) the output signal V of execution module control signal control module
OUT=V
nUpgrade said V
N-1=V
n
The principle of above-mentioned control method is following:
The same with existing potentiometer arrangements for speed regulation, what the sample voltage value size of potentiometer was reflected is the Be Controlled rotating speed of motor, and it is directly proportional with the Be Controlled rotating speed of motor, therefore, and Δ V
nReflection be the size of the Be Controlled rotating speed of motor changing value that will produce, as-Δ V<Δ V
n<during Δ V, represent that this changing value is in the Δ V scope of dead band, this changing value is to be produced by potentiometer precision and signal transmission interference, then exports signal V this moment
OUT=V
n, it is constant to control controlled motor speed, thereby eliminates the erratic fluctuations of motor speed; As Δ V
n<during-Δ V, the changing value of this moment has exceeded dead zone range, and is negative value; Represent that then this changing value is to be produced by the reduce-speed sign that prime is controlled; Need the controlled motor of control to slow down, then adopt the PI algorithm, adjust the control signal V that said potentiometer exports said servo electrical machinery system to
OUT=V
N-1-V
m, promptly with V
mFor unit progressively reduces control signal, progressively lower thereby control controlled motor speed, thereby guarantee that controlled motor speed does not suddenly change; In like manner, as Δ V
n>During Δ V, represent that then this changing value is to be produced by the signal for faster that prime is controlled, need the controlled motor of control to quicken, then adopt the PI algorithm, adjust the control signal V that said potentiometer exports said servo electrical machinery system to
OUT=V
N-1+ V
m, with V
mFor unit progressively strengthens control signal, progressively quicken thereby control controlled motor speed, thereby guarantee that controlled motor speed does not suddenly change.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For person of ordinary skill in the field of the present invention, do not breaking away under the prerequisite of the present invention design, can also make some being equal to substitute or obvious modification, and performance or purposes are identical, all should be regarded as belonging to protection scope of the present invention.
Claims (2)
1. potentiometer governing system, it is characterized in that: comprise the signal controlling module, the input end of this signal controlling module is connected with the output terminal of potentiometer, and the output terminal of signal controlling module is connected with the signal input end of servo electrical machinery system;
Said signal controlling module comprises:
Signal reading module is used for the current sample voltage value V of reading potential device
nWith the preceding once sample voltage value V of sampling
N-1
Calculate and comparison module, be used to calculate said V
nAnd V
N-1Poor Δ V
n=V
n-V
N-1, and more said Δ V
nSize with preset threshold value Δ V;
Signal-adjusting module is used for carrying out Signal Regulation according to the comparative result of said calculating and comparison module, when-Δ V<Δ V
n<during Δ V, keep V
nBe worth constant; As Δ V
n<during-Δ V, upgrade V
n=V
N-1-V
mAs Δ V
n>During Δ V, upgrade V
n=V
N-1+ V
mSaid V
mBe preset potentiometer regulated value;
Execution module is used for the Signal Regulation result according to signal-adjusting module, the control signal V of control signal control module output
OUT=V
nAnd upgrade said V
N-1=V
n
2. control method of potentiometer governing system according to claim 1 is characterized in that: may further comprise the steps:
The sample voltage value V that the reading potential device is current
nWith the preceding once sample voltage value V of sampling
N-1
Calculate said V
nAnd V
N-1Poor Δ V
n=V
n-V
N-1
More said Δ V
nWith the size of preset threshold value Δ V, when-Δ V<Δ V
n<during Δ V, keep V
nBe worth constant; As Δ V
n<during-Δ V, upgrade V
n=V
N-1-V
mAs Δ V
n>During Δ V, upgrade V
n=V
N-1+ V
mSaid V
mBe preset potentiometer regulated value;
The control signal V of control signal control module output
OUT=V
nAnd upgrade said V
N-1=V
n
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100606183A CN102176174B (en) | 2011-03-14 | 2011-03-14 | Speed regulating system and control method thereof for potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100606183A CN102176174B (en) | 2011-03-14 | 2011-03-14 | Speed regulating system and control method thereof for potentiometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102176174A CN102176174A (en) | 2011-09-07 |
| CN102176174B true CN102176174B (en) | 2012-11-21 |
Family
ID=44519364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100606183A Expired - Fee Related CN102176174B (en) | 2011-03-14 | 2011-03-14 | Speed regulating system and control method thereof for potentiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102176174B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632633B (en) * | 2017-06-29 | 2019-01-08 | 深圳前海慧联科技发展有限公司 | A kind of adaptive range revolving speed conditioning circuit and Opsonizing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3983954A (en) * | 1974-01-17 | 1976-10-05 | Associated Engineering Limited | Speed responsive systems |
| CN1354404A (en) * | 2001-02-27 | 2002-06-19 | 华南理工大学 | Mechanical rotating speed auto-control system adopting rotating speed direct feedback |
| CN2772114Y (en) * | 2003-12-16 | 2006-04-12 | 孙怀禄 | Ac frequency transformer general miniature mechanical automatic speed regulator |
-
2011
- 2011-03-14 CN CN2011100606183A patent/CN102176174B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3983954A (en) * | 1974-01-17 | 1976-10-05 | Associated Engineering Limited | Speed responsive systems |
| CN1354404A (en) * | 2001-02-27 | 2002-06-19 | 华南理工大学 | Mechanical rotating speed auto-control system adopting rotating speed direct feedback |
| CN2772114Y (en) * | 2003-12-16 | 2006-04-12 | 孙怀禄 | Ac frequency transformer general miniature mechanical automatic speed regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102176174A (en) | 2011-09-07 |
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| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN WONDER BORN ROYMAX TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHENZHEN WONDER BORN INDUSTRY CO., LTD. Effective date: 20120401 |
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Effective date of registration: 20120401 Address after: 1, one or two layers of Bamboo Village Industrial Park, Xincheng community, Guanlan District, Shenzhen, Guangdong, Baoan District 518000 Applicant after: Shenzhen Wonder Born Roymax Technology Co., Ltd. Address before: Baoan District Shenzhen City, Guangdong province 518000 Guanlan street view of the city community to view Nan Lu Jin Technology Park B building six floor Applicant before: Shenzhen Wonder Born Industry Co., Ltd. |
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