CN102004166B - Device and method for measuring rotating speed of brush motor - Google Patents
Device and method for measuring rotating speed of brush motor Download PDFInfo
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- CN102004166B CN102004166B CN2010102856827A CN201010285682A CN102004166B CN 102004166 B CN102004166 B CN 102004166B CN 2010102856827 A CN2010102856827 A CN 2010102856827A CN 201010285682 A CN201010285682 A CN 201010285682A CN 102004166 B CN102004166 B CN 102004166B
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- 238000001914 filtration Methods 0.000 claims abstract description 25
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 11
- 238000000691 measurement method Methods 0.000 claims description 4
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Abstract
The invention provides a device and a method for measuring the rotating speed of a brush motor. The method comprises the following steps: when a commutator of the motor is commutated, a motor current sudden change pulse signal is generated, and the current sudden change pulse is converted into a small voltage signal through a current sampling resistor; amplifying the voltage signal into a large voltage signal through a signal amplifying device; performing band-pass filtering through a signal filtering device to select a sinusoidal signal of the commutator commutation pulse; shaping the sinusoidal signal into a rectangular wave pulse signal through a signal shaping device; and measuring the pulse width or frequency by a pulse width frequency measuring device, and converting according to the pole pair number of the motor commutator to obtain the final motor rotating speed. The rotating speed of the brush motor can be accurately measured, the operation is simple, and the production efficiency can be improved.
Description
Technical field
The present invention relates to a kind of brush motor rotation-speed measuring device and measuring method.
Background technology
In rotating speed of motor was measured, especially on the testing apparatus of the product of volume production or volume production product, the method for generally taking was to stick the cursor scraps of paper that a reflector laser is used at motor shaft or the positions such as blower fan that link to each other with axle; Measure rotating speed with laser velocimeter then; It is through emission of lasering beam, and motor whenever turns around then, and laser beam is reflected once by the cursor scraps of paper; Obtain reflected impulse of every circle, calculate motor speed with this.This method has three problems: the one, and motor of every measurement all must have the cursor of subsides paper, tears two loaded down with trivial details actions of cursor paper; The 2nd, in the measuring process, the cursor scraps of paper that must very accurately laser alignment be pasted; The 3rd, motor whenever turns around, and laser only is reflected once, this commentaries on classics one the circle within, measurement be the mean speed of this circle, the fluctuation up and down of motor speed can't be measured.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of brush motor rotation-speed measuring device and measuring method, can accurately measure the rotating speed of brush motor, and simple to operate, can enhance productivity.
For solving above-mentioned existing technical matters; The present invention adopts following scheme: a kind of brush motor rotation-speed measuring device comprises the current sampling resistor that is connected with motor, the signal amplifying apparatus that is connected with current sampling resistor, the signal filtering device that is connected with signal amplifying apparatus, the signal shaping that is connected with the signal filtering device, the pulse duration frequency measurement mechanism that is connected with signal shaping.
As preferably, said signal filtering device adopts the logical SCF of high-order band.The unwanted noise signal of filtering strengthens its signal to noise ratio (S/N ratio) more accurately.
A kind of brush motor rotating speed measurement method comprises following steps:
Step 1: can produce current of electric sudden change pulse signal during the switching-over of the commutator of motor, convert the current of electric pulse signal that suddenlys change into little voltage signal through current sampling resistor;
Step 2: little voltage signal is enlarged into big voltage signal through signal amplifying apparatus;
Step 3: through the signal filtering device big voltage signal is carried out bandpass filtering, select the sinusoidal signal of commutator commutating pulse;
Step 4: be shaped as square-wave signal through the sinusoidal signal of signal shaping after with pulse bandwidth filtering;
Step 5: square-wave signal is carried out pulsewidth or frequency measurement through the pulse duration frequency measurement mechanism; And convert according to motor commutator number of pole-pairs; Motor speed ω=60*F/N unit is rev/min; Wherein F is the commutator commutating pulse frequency that measures, and N is the commutator number of pole-pairs, obtains final motor speed.
As preferably, said signal filtering device adopts the logical SCF of high-order band, controls lower limiting frequency through the clock signal frequency of the logical SCF of control high-order band.Simple to operate.
Beneficial effect:
The present invention adopts technique scheme that a kind of brush motor rotation-speed measuring device and measuring method are provided, and can accurately measure the rotating speed of brush motor, and simple to operate, has improved production efficiency.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
As shown in Figure 1; A kind of brush motor rotation-speed measuring device comprises the current sampling resistor 2 that is connected with motor 1, the signal amplifying apparatus 3 that is connected with current sampling resistor 2, the signal filtering device 4 that is connected with signal amplifying apparatus 3, the signal shaping 5 that is connected with signal filtering device 4, the pulse duration frequency measurement mechanism 6 that is connected with signal shaping 5.Said signal filtering device 4 adopts the logical SCF of high-order band.
A kind of brush motor rotating speed measurement method comprises following steps:
Step 1: can produce current of electric sudden change pulse signal during the switching-over of the commutator of motor 1, convert the current of electric pulse signal that suddenlys change into little voltage signal through current sampling resistor 2;
Step 2: small voltage signal is enlarged into big voltage signal through signal amplifying apparatus 3;
Step 3: through signal filtering device 4 big voltage signal is carried out bandpass filtering, select the sinusoidal signal of commutator commutating pulse;
Step 4: the sinusoidal signal after the pulse bandwidth filtering is shaped as square-wave signal through signal shaping 5;
Step 5: carry out pulsewidth or frequency measurement through 6 pairs of square-wave signals of pulse duration frequency measurement mechanism; And convert according to motor commutator number of pole-pairs; Motor speed ω=60*F/N unit is rev/min; Wherein F is the commutator commutating pulse frequency that measures, and N is the commutator number of pole-pairs, obtains final motor speed.
Said signal filtering device 4 adopts the logical SCF of high-order band, controls lower limiting frequency through the clock signal frequency of the logical SCF of control high-order band.The rotating speed of motor of different model is measured can be according to the rotating speed of motor approximate range of different model; Control the last lower limiting frequency of BPF. through the clock signal frequency of computer controlled automatic BPF.; The more accurate unwanted noise signal of filtering strengthens its signal to noise ratio (S/N ratio).
Claims (4)
1. brush motor rotation-speed measuring device is characterized in that: comprise the current sampling resistor (2) that is connected with motor (1), the signal amplifying apparatus (3) that is connected with current sampling resistor (2), the signal filtering device (4) that is connected with signal amplifying apparatus (3), the signal shaping (5) that is connected with signal filtering device (4), the pulse duration frequency measurement mechanism (6) that is connected with signal shaping (5).
2. a kind of brush motor rotation-speed measuring device according to claim 1 is characterized in that: said signal filtering device (4) adopts the logical SCF of high-order band.
3. brush motor rotating speed measurement method is characterized in that: comprise following steps:
Step 1: can produce current of electric sudden change pulse signal during the switching-over of the commutator of motor (1), convert the current of electric pulse signal that suddenlys change into little voltage signal through current sampling resistor (2);
Step 2: little voltage signal is enlarged into big voltage signal through signal amplifying apparatus (3);
Step 3: through signal filtering device (4) big voltage signal is carried out bandpass filtering, select the sinusoidal signal of commutator commutating pulse;
Step 4: the sinusoidal signal behind the bandpass filtering is shaped as square-wave signal through signal shaping (5);
Step 5: square-wave signal is carried out pulsewidth or frequency measurement through pulse duration frequency measurement mechanism (6); And convert according to motor commutator number of pole-pairs; Motor speed ω=60*F/N unit is rev/min; Wherein F is the commutator commutating pulse frequency that measures, and N is the commutator number of pole-pairs, obtains final motor speed.
4. a kind of brush motor rotating speed measurement method according to claim 3; It is characterized in that: said signal filtering device (4) adopts the logical SCF of high-order band, controls lower limiting frequency through the clock signal frequency of the logical SCF of control high-order band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102856827A CN102004166B (en) | 2010-09-17 | 2010-09-17 | Device and method for measuring rotating speed of brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102856827A CN102004166B (en) | 2010-09-17 | 2010-09-17 | Device and method for measuring rotating speed of brush motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102004166A CN102004166A (en) | 2011-04-06 |
| CN102004166B true CN102004166B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102856827A Expired - Fee Related CN102004166B (en) | 2010-09-17 | 2010-09-17 | Device and method for measuring rotating speed of brush motor |
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| CN (1) | CN102004166B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102621344B (en) * | 2012-03-17 | 2014-07-16 | 佛山市顺德区海伦宝电器有限公司 | Magnetic induction rotation speed measuring device |
| CN103033640B (en) * | 2012-12-04 | 2014-12-10 | 中国北方车辆研究所 | Vehicle speed real-time detection method with field programmable gate array (FPGA) |
| CN103105503B (en) * | 2012-12-13 | 2014-07-30 | 中国北车集团大连机车车辆有限公司 | Detection method used for locomotive traction motor speed signals and based on magnetoelectric sensor |
| CN103344779B (en) * | 2013-05-09 | 2016-02-03 | 重庆南方数控设备有限责任公司 | A kind of apparatus and method obtaining driving peristaltic pump DC motor speed |
| CN105083057A (en) * | 2014-04-25 | 2015-11-25 | 德昌电机(深圳)有限公司 | Seat position adjusting system and method |
| CN104197964A (en) * | 2014-08-26 | 2014-12-10 | 宁波双林汽车部件股份有限公司 | Current waveform/rectangular pulse conversion circuit device |
| CN104986282B (en) * | 2015-07-15 | 2018-05-15 | 四川安尔达电动车有限公司 | The control method and device of electric bicycle |
| CN105680744A (en) * | 2016-03-08 | 2016-06-15 | 江苏仁源电气有限公司 | Speed regulation device and speed regulation method of DC brush motor |
| CN105675906A (en) * | 2016-03-08 | 2016-06-15 | 江苏仁源电气有限公司 | Direct current brushed motor speed measurement device and speed measurement method |
| CN106908726B (en) * | 2017-03-09 | 2019-09-03 | 迈普通信技术股份有限公司 | Working condition detection system, method and the network equipment of direct current generator |
| CN109861598B (en) * | 2017-11-30 | 2020-12-04 | 纬湃汽车电子(芜湖)有限公司 | System and method for detecting rotation speed of brushed direct current motor |
| CN110275043B (en) * | 2019-06-21 | 2020-12-15 | 拉扎斯网络科技（上海）有限公司 | Method and device for detecting rotating speed of direct current motor, storage medium and electronic equipment |
| CN114264836B (en) * | 2021-12-22 | 2024-05-17 | 南京苏美达智能技术有限公司 | Method for detecting rotating speed of brush motor and automatic walking equipment |
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| CN2232587Y (en) * | 1994-07-19 | 1996-08-07 | 沈跃 | Engine rotational speed meter |
| CN2298519Y (en) * | 1997-05-28 | 1998-11-25 | 谢德约 | Engine frequency/speed measuring appliance |
| CN2733360Y (en) * | 2004-08-07 | 2005-10-12 | 周开勇 | Rotation speed measuring circuit for brush DC dynamo and rotation speed regulate and control device using the circuit |
| CN2909262Y (en) * | 2006-06-21 | 2007-06-06 | 许晓华 | DC dynamo tachometer |
| CN200953026Y (en) * | 2006-07-05 | 2007-09-26 | 唐国宝 | Rotor frequency method electric machine rotating speed measuring device |
| CN101545915A (en) * | 2009-04-30 | 2009-09-30 | 中国科学院上海技术物理研究所 | Motor speed measuring method based on Doppler effect of inductosyn |
| 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 |
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2010
- 2010-09-17 CN CN2010102856827A patent/CN102004166B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232587Y (en) * | 1994-07-19 | 1996-08-07 | 沈跃 | Engine rotational speed meter |
| CN2298519Y (en) * | 1997-05-28 | 1998-11-25 | 谢德约 | Engine frequency/speed measuring appliance |
| CN2733360Y (en) * | 2004-08-07 | 2005-10-12 | 周开勇 | Rotation speed measuring circuit for brush DC dynamo and rotation speed regulate and control device using the circuit |
| CN2909262Y (en) * | 2006-06-21 | 2007-06-06 | 许晓华 | DC dynamo tachometer |
| CN200953026Y (en) * | 2006-07-05 | 2007-09-26 | 唐国宝 | Rotor frequency method electric machine rotating speed measuring device |
| 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 |
| CN101545915A (en) * | 2009-04-30 | 2009-09-30 | 中国科学院上海技术物理研究所 | Motor speed measuring method based on Doppler effect of inductosyn |
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| CN102004166A (en) | 2011-04-06 |
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