CN101867338A - Speed control system of brush cutter and control method thereof - Google Patents
Speed control system of brush cutter and control method thereof Download PDFInfo
- Publication number
- CN101867338A CN101867338A CN 201010176601 CN201010176601A CN101867338A CN 101867338 A CN101867338 A CN 101867338A CN 201010176601 CN201010176601 CN 201010176601 CN 201010176601 A CN201010176601 A CN 201010176601A CN 101867338 A CN101867338 A CN 101867338A
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- speed
- motor
- control system
- module
- brush cutter
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
- A01D34/90—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for carrying by the operator
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
- A01D69/02—Driving mechanisms or parts thereof for harvesters or mowers electric
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
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Abstract
The invention discloses a speed control system of a brush cutter, comprising a constant speed control system. The speed control system is characterized by also comprising a shift adjusting device which is at least provided with two shifts, and the shift adjusting device is connected with a control circuit of the constant speed control system. By using the speed control system, a user correspondingly adjusts the constant speed shift of the rotating speed, thereby effectively improving the working efficiency and prolonging the service time of a battery packet.
Description
Technical field
The present invention relates to a kind of brush cutter, especially relate to a kind of control system that can keep the brush cutter constant speed, belong to machinery the automatic control technology field is set.
Background technology
Usually use the brush cutter of power brick on the market as power source, for machine rotational speed all is not add special control, when just beginning to enable, battery moves with high relatively rotating speed owing to the electric weight abundance makes machine, the power brick electric weight descends rapidly, rotating speed causes the utilization ratio of power brick electric energy not high along with the decline of power brick electric weight also descends gradually afterwards.
Summary of the invention
The objective of the invention is, a kind of speed control system of brush cutter is provided, can guarantee under nominal situation, motor speed is constant relatively, prolonged the operating time after power brick is full of electricity at every turn, improved the power brick electric energy utilization ratio, reduced charging times, also prolonged the useful life of power brick in the time of the handled easily person.
Another object of the present invention provides a kind of speed control system of brush cutter, can adjust brush cutter according to different operating modes moves under the constant speed of different gears, so that the operator according to the load size adjustment rotating speed of different operating modes, further improves the service efficiency of power brick electric energy.
To achieve these goals, the invention provides a kind of speed control system of brush cutter, comprise constant speed control system, it is characterized in that: also comprise the gear adjusting device that has two gears at least, described gear adjusting device links to each other with the control circuit of constant speed control system.
Aforesaid speed control system of brush cutter, it is characterized in that: described constant speed control system comprises speed detector, on the axle of brush cutter motor, a magnet ring with n to the N-S utmost point is installed, n 〉=1, described speed detector is provided with near the excircle direction of magnet ring, and speed detector and gear adjusting device link to each other with control circuit, and control circuit links to each other with motor, the control circuit power supply links to each other with control circuit, and dc-battery is given control circuit power supply and motor power supply.
Aforesaid speed control system of brush cutter is characterized in that: described n=4.
Many grades of constant speed control systems of aforesaid brush cutter is characterized in that: described speed detector is a Hall element.
Aforesaid speed control system of brush cutter is characterized in that: described control circuit comprises MCU, and described MCU comprises following functional module:
Interrupt module: rising edge or trailing edge by the square-wave pulse signal of pin trigger external interrupt, calculate the time T of motor rotation one circle, and the time T of a circle is transferred back to computing and the processing of carrying out speed in the main program, zero clearing count variable value again;
Main program module: main program module comprises speed calculation module and pid control module,
The time T that the motor operation one that described speed calculation module records by interrupt module is enclosed is calculated the rotating speed when the reality of front motor, and the current speed of this computing is delivered in the pid control module;
Described pid control module is according to the speed of current calculating, and preceding twice speed and predefined speed carries out the computing than row, differential, integration, and the result who obtains is used to revise current speed, according to erection rate control motor speed.
Aforesaid speed control system of brush cutter is characterized in that: in speed calculation module, and present speed=(1 a minute/n PRT)/speed reducing ratio.
Aforesaid speed control system of brush cutter, it is characterized in that: in described pid control module, by detecting the actual speed that the motor actual speed calculates cutter, if being higher than, the cutter actual speed that obtains sets the constant speed value, then controlling motor slows down, set the constant speed value if the cutter actual speed that obtains is lower than, then control the motor speedup, the cutter actual speed is maintained in the permission domain of walker of setting the constant speed value.
The control method of aforesaid speed control system of brush cutter is characterized in that, comprises following each step:
1) gear adjusting device is arranged on a certain gear, the MCU in the control circuit judges the gear stages of setting by the magnitude of voltage on the detection gear adjusting device;
When 2) magnet ring was followed the motor rotation, magnetic field can change, and the output of Hall element presents the square wave in n cycle;
3) in the interrupt module in control circuit MCU, the rising edge of square-wave pulse or trailing edge trigger the interruption of MCU, calculate the time T of motor rotation one circle, a time T of enclosing is transferred back to computing and the processing of carrying out speed in the main program, zero clearing count variable value again;
4) in speed calculation module, the motor that records by interrupt module moves the rotating speed of the time T calculating of a circle when the reality of front motor, and the current speed of this computing is delivered in the pid control module;
5) in pid control module, according to the speed of current calculating, and preceding twice speed and predefined speed carries out the computing than row, differential, integration, and the result who obtains is used to revise current speed, according to erection rate control motor speed.
The control method of aforesaid speed control system of brush cutter is characterized in that: in described step 4), and present speed=(1 a minute/n PRT)/speed reducing ratio.
The control method of aforesaid speed control system of brush cutter, it is characterized in that: in described step 5), by detecting the actual speed that the motor actual speed calculates cutter, if the cutter actual speed that obtains is higher than the upper limit of the permission domain of walker of setting the constant speed value, then controlling motor slows down, if the cutter actual speed that obtains is lower than the lower limit of the permission domain of walker of setting the constant speed value, then control the motor speedup, the cutter actual speed is maintained in the permission domain of walker of setting the constant speed value.
The beneficial effect that the present invention reached:
Speed control system of the present invention, the user is according to different operating modes (for example density degree of the shrub of cutting) and the constant speed gear of corresponding adjusting rotating speed has effectively improved operating efficiency, prolonged the service time of power brick.Detect the real-time speed of motor simultaneously by speed detector, utilize control circuit that current speed is revised, again the motor speed of service is adjusted control, guaranteed machine in each cutting operation from the end of starting working, the rotating speed of instrument is constant relatively, the higher waste electric energy of rotating speed when having avoided underloading, or low the causing of when heavy duty rotating speed is short of power.
Description of drawings
Fig. 1 is the structural representation of control system of the present invention;
Fig. 2 is the circuit connection diagram of control system of the present invention;
Fig. 3 is the program flow diagram of interrupt module of the present invention;
Fig. 4 is the program flow diagram of main program module of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of control system of the present invention; Fig. 2 is the circuit connection diagram of control system of the present invention.On the axle of motor, the magnet ring with 4 pairs of N-S utmost points is installed, Hall element is provided with near the excircle direction of magnet ring, Hall element, gear potentiometer or driving switch link to each other with control circuit respectively, control circuit links to each other with motor, the control circuit power supply links to each other with control circuit, and dc-battery is given control circuit power supply and motor power supply.Preferably, potentiometer with switch VAR has two gears.In other embodiments, as gear adjusting device, the gear potentiometer is substituted by driving switch, and control system is come the gear of the current setting of decision operation person by judging the level value on the driving switch.
The course of work of many grades of constant speed control systems of brush cutter of the present invention is:
MCU in the control circuit judges the gear stages that the user sets by the magnitude of voltage that detects on the driving switch, carries out the setting of many grades of rotating speeds by this way.
When motor rotated, the magnet ring that is contained on the motor shaft also and then rotated together.4 pairs of magnetic poles are arranged in the magnet ring, follow motor when rotating at magnet ring, magnetic field can change, Hall element because of be contained in magnet ring near, therefore, motor whenever turns around, and will present the square wave in 4 cycles at the output of Hall element.MCU in the control circuit detects the cycle of this square-wave signal.By the cycle of square-wave signal, calculate current speed, present speed=(1 minute/4 PRTs)/speed reducing ratio.
In program, utilize the cycle of the pin measurement square wave of MCU (single-chip microcomputer), concrete, rising edge or trailing edge that the pulse signal of square wave is arranged on the pin of single-chip microcomputer, will trigger the external interrupt of single-chip microcomputer, in interrupt routine, measure the time of motor rotation one circle, this " time of a circle " is transferred back to computing and the processing of carrying out speed in the main program.
In main program, the motor that records by interrupt module moves the rotating speed of the time T calculating of a circle when the reality of front motor, and the current speed of this computing is delivered in the pid control module, pid control module is according to the speed of current calculating, and preceding twice speed, the speed that the client sets is carried out the computing than row, differential, integration, and the result who obtains is used to revise current speed.That is, by detecting the actual speed that the motor actual speed calculates cutter; If being higher than, the cutter actual speed that obtains sets the constant speed value, then slow down by pid control module control motor, if being lower than, the cutter actual speed that obtains sets the constant speed value, then by pid control module control motor speedup, the cutter actual speed is maintained in the permission domain of walker of setting the constant speed value as far as possible.
In the present invention, brush cutter (Brush cutter) has the constant speed setting, and first-selected has two constant speed gears, by switching between two constant speed shelves, can realize that brush cutter is respectively with first constant speed and second constant-speed operation.Except Hall element tests the speed, in other embodiments, the detection of speed can also realize by inductance.For brush cutter, first-selected ground, the first constant speed value is 6000rpm, in 10% scope of floating down thereon, all is considered to first constant-speed operation; First-selected ground, the second constant speed value is 4000rpm, in 10% scope of floating down thereon, all is considered to second constant-speed operation.The 6000rpm here, 4000rpm are the rotating speeds of cutter, the rotation of motor passes to cutter after by reducing gear, wherein reducing gear and the present invention are non-directly related, and the existing adaptable reducing gear of polytype in the prior art, do not repeat them here.Certainly the constant speed value also can be set the tachometer value of other numerical value for.Brush cutter among the present invention also can have more than two constant speed shelves.Setting with different constant speed shelves also can be applied in other DC tools.The consumer can rationally regulate rotating speed according to the different operating modes of machine application, increases work efficiency to prolong the power brick operating time.
Below disclose the present invention with preferred embodiment, so it is not in order to restriction the present invention, and all employings are equal to replaces or technical scheme that the equivalent transformation mode is obtained, all drops within protection scope of the present invention.
Claims (10)
1. a speed control system of brush cutter comprises constant speed control system, it is characterized in that: also comprise the gear adjusting device that has two gears at least, described gear adjusting device links to each other with the control circuit of constant speed control system.
2. speed control system of brush cutter according to claim 1, it is characterized in that: described constant speed control system comprises speed detector, on the axle of brush cutter motor, a magnet ring with n to the N-S utmost point is installed, n 〉=1, described speed detector is provided with near the excircle direction of magnet ring, and speed detector and gear adjusting device link to each other with control circuit, and control circuit links to each other with motor, the control circuit power supply links to each other with control circuit, and dc-battery is given control circuit power supply and motor power supply.
3. speed control system of brush cutter according to claim 2 is characterized in that: described n=4.
4. many grades of constant speed control systems of brush cutter according to claim 1 and 2 is characterized in that: described speed detector is a Hall element.
5. speed control system of brush cutter according to claim 1 and 2 is characterized in that: described control circuit comprises MCU, and described MCU comprises following functional module:
Interrupt module: rising edge or trailing edge by the square-wave pulse signal of pin trigger external interrupt, calculate the time T of motor rotation one circle, and the time T of a circle is transferred back to computing and the processing of carrying out speed in the main program, zero clearing count variable value again;
Main program module: main program module comprises speed calculation module and pid control module,
The time T that the motor operation one that described speed calculation module records by interrupt module is enclosed is calculated the rotating speed when the reality of front motor, and the current speed of this computing is delivered in the pid control module;
Described pid control module is according to the speed of current calculating, and preceding twice speed and predefined speed carries out the computing than row, differential, integration, and the result who obtains is used to revise current speed, according to erection rate control motor speed.
6. speed control system of brush cutter according to claim 5 is characterized in that: in speed calculation module, and present speed=(1 a minute/n PRT)/speed reducing ratio.
7. speed control system of brush cutter according to claim 5, it is characterized in that: in described pid control module, by detecting the actual speed that the motor actual speed calculates cutter, if being higher than, the cutter actual speed that obtains sets the constant speed value, then controlling motor slows down, set the constant speed value if the cutter actual speed that obtains is lower than, then control the motor speedup, the cutter actual speed is maintained in the permission domain of walker of setting the constant speed value.
8. the control method of speed control system of brush cutter according to claim 5 is characterized in that, comprises following each step:
1) gear adjusting device is arranged on a certain gear, the MCU in the control circuit judges the gear stages of setting by the magnitude of voltage on the detection gear adjusting device;
When 2) magnet ring was followed the motor rotation, magnetic field can change, and the output of Hall element presents the square wave in n cycle;
3) in the interrupt module in control circuit MCU, the rising edge of square-wave pulse or trailing edge trigger the interruption of MCU, calculate the time T of motor rotation one circle, a time T of enclosing is transferred back to computing and the processing of carrying out speed in the main program, zero clearing count variable value again;
4) in speed calculation module, the motor that records by interrupt module moves the rotating speed of the time T calculating of a circle when the reality of front motor, and the current speed of this computing is delivered in the pid control module;
5) in pid control module, according to the speed of current calculating, and preceding twice speed and predefined speed carries out the computing than row, differential, integration, and the result who obtains is used to revise current speed, according to erection rate control motor speed.
9. the control method of speed control system of brush cutter according to claim 8 is characterized in that: in described step 4), and present speed=(1 a minute/n PRT)/speed reducing ratio.
10. the control method of speed control system of brush cutter according to claim 8, it is characterized in that: in described step 5), by detecting the actual speed that the motor actual speed calculates cutter, if the cutter actual speed that obtains is higher than the upper limit of the permission domain of walker of setting the constant speed value, then controlling motor slows down, if the cutter actual speed that obtains is lower than the lower limit of the permission domain of walker of setting the constant speed value, then control the motor speedup, the cutter actual speed is maintained in the permission domain of walker of setting the constant speed value.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010176601 CN101867338A (en) | 2010-05-19 | 2010-05-19 | Speed control system of brush cutter and control method thereof |
| DE202011000540U DE202011000540U1 (en) | 2010-05-19 | 2011-03-09 | Speed control system of a brush cutter |
| JP2011001539U JP3168218U (en) | 2010-05-19 | 2011-03-23 | Brush cutter speed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010176601 CN101867338A (en) | 2010-05-19 | 2010-05-19 | Speed control system of brush cutter and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101867338A true CN101867338A (en) | 2010-10-20 |
Family
ID=42958927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010176601 Pending CN101867338A (en) | 2010-05-19 | 2010-05-19 | Speed control system of brush cutter and control method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3168218U (en) |
| CN (1) | CN101867338A (en) |
| DE (1) | DE202011000540U1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388753A (en) * | 2011-07-14 | 2012-03-28 | 南京德朔实业有限公司 | Blade tooth overlap control system of cutting tool and control method of blade tooth overlap control system |
| CN103053265A (en) * | 2013-02-06 | 2013-04-24 | 常州合力电器有限公司 | Dual-wrapped lithium battery grass cutter |
| CN103532451A (en) * | 2013-10-31 | 2014-01-22 | 重庆长安汽车股份有限公司 | Fault diagnosis method for position signal of rotary transformer |
| CN108112356A (en) * | 2016-11-28 | 2018-06-05 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN109338607A (en) * | 2018-10-11 | 2019-02-15 | 浙江众邦机电科技有限公司 | A kind of motor heavy duty control method of sewing machine, device, medium, equipment |
| CN113517830A (en) * | 2020-08-14 | 2021-10-19 | 苏州市春菊电器有限公司 | Method for controlling constant suction force of dust collector |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013192511A (en) * | 2012-03-21 | 2013-09-30 | Kubota Corp | Bush cutter |
| EP2835045B1 (en) | 2013-08-05 | 2019-06-19 | Black & Decker Inc. | Vegetation cutting device |
| JP7183705B2 (en) * | 2018-10-30 | 2022-12-06 | 工機ホールディングス株式会社 | lawn mower |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201078756Y (en) * | 2007-08-15 | 2008-06-25 | 深圳和而泰智能控制股份有限公司 | Inductance type velocity detection circuit |
| CN101257278A (en) * | 2008-04-03 | 2008-09-03 | 浙江三木实业有限公司 | Automatic gear shifting system of paper chipper |
| CN101505128A (en) * | 2009-03-30 | 2009-08-12 | 江苏新日电动车股份有限公司 | Shift control method for multi-stage motor |
-
2010
- 2010-05-19 CN CN 201010176601 patent/CN101867338A/en active Pending
-
2011
- 2011-03-09 DE DE202011000540U patent/DE202011000540U1/en not_active Expired - Lifetime
- 2011-03-23 JP JP2011001539U patent/JP3168218U/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201078756Y (en) * | 2007-08-15 | 2008-06-25 | 深圳和而泰智能控制股份有限公司 | Inductance type velocity detection circuit |
| CN101257278A (en) * | 2008-04-03 | 2008-09-03 | 浙江三木实业有限公司 | Automatic gear shifting system of paper chipper |
| CN101505128A (en) * | 2009-03-30 | 2009-08-12 | 江苏新日电动车股份有限公司 | Shift control method for multi-stage motor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388753A (en) * | 2011-07-14 | 2012-03-28 | 南京德朔实业有限公司 | Blade tooth overlap control system of cutting tool and control method of blade tooth overlap control system |
| CN103053265A (en) * | 2013-02-06 | 2013-04-24 | 常州合力电器有限公司 | Dual-wrapped lithium battery grass cutter |
| CN103053265B (en) * | 2013-02-06 | 2014-10-22 | 常州合力电器有限公司 | Dual-wrapped lithium battery grass cutter |
| CN103532451A (en) * | 2013-10-31 | 2014-01-22 | 重庆长安汽车股份有限公司 | Fault diagnosis method for position signal of rotary transformer |
| CN108112356A (en) * | 2016-11-28 | 2018-06-05 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN109338607A (en) * | 2018-10-11 | 2019-02-15 | 浙江众邦机电科技有限公司 | A kind of motor heavy duty control method of sewing machine, device, medium, equipment |
| CN113517830A (en) * | 2020-08-14 | 2021-10-19 | 苏州市春菊电器有限公司 | Method for controlling constant suction force of dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202011000540U1 (en) | 2011-10-05 |
| JP3168218U (en) | 2011-06-02 |
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Geng Zheng Inventor after: Meng Chao Inventor after: Yamaoka Toshinari Inventor before: Geng Zheng Inventor before: Meng Chao |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: GENG ZHENG MENG CHAO TO: GENG ZHENG MENG CHAO YAMAOKA TOSHINARI |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101020 |