CN102944689A - Brushless direct-current motor rotation speed detection device adopting charge coupled device (CCD) camera and method - Google Patents
Brushless direct-current motor rotation speed detection device adopting charge coupled device (CCD) camera and method Download PDFInfo
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- CN102944689A CN102944689A CN201210453889XA CN201210453889A CN102944689A CN 102944689 A CN102944689 A CN 102944689A CN 201210453889X A CN201210453889X A CN 201210453889XA CN 201210453889 A CN201210453889 A CN 201210453889A CN 102944689 A CN102944689 A CN 102944689A
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Abstract
The invention discloses a brushless direct-current motor rotation speed detection device adopting a charge coupled device (CCD) camera and a method. The device comprises a CCD camera and a main computer, wherein the CCD camera also comprises a preprocessing circuit and an analog/digital (A/D) conversion unit. The method comprises the following steps of setting a mark line on a rotating shaft; installing the CCD camera; and detecting a rotation speed of a motor. Due to the adoption of the device and the method, a position sensor does not need to be arranged inside the brushless direct-current motor, so that the structure of the motor main body is prevented from being changed, and the running reliability of the motor is improved. Due to the adoption of the CCD camera video detection method, the noncontact measurement of the motor speed can be realized, the system can response as long as a motor rotor produces one pixel displacement, and the measurement precision is high.
Description
Technical field
The present invention relates to a kind of brushless dc tachometer and method, especially a kind of brushless dc tachometer and method that adopts ccd video camera.
Background technology
Brshless DC motor is general to adopt 120 ° of conducting type three-phase six state square waves to drive control method, provide the driving signal of six power tubes in the control cycle by detecting the p-m rotor position, guarantee the correct commutation of each phase, and by putting on effective voltage on the motor to regulate its rotating speed.The detection of the rotating speed of brshless DC motor is usually adopted in modes such as motor internal installation Hall element, photoelectric encoders and is realized.But be built in the existence of the rotor-position sensor of motor internal, so that connection element increases between motor and operation circuit, the vulnerability to jamming variation.For the variety of problems that position transducer brings, the Brushless DC Motor Position detection methods such as Based on Back-EMF Method, fly-wheel diode method, inductance method and state observer method are proposed in succession.But when static or rotating speed is low when brshless DC motor, these methods all are difficult to obtain accurately rotor-position and motor speed, need at first electric motor starting to certain rotating speed could be used corresponding detection method, limited to a great extent the promotion and application of brshless DC motor.Therefore, seek a kind of device and method motor body outside, that can realize the accurate detection of motor speed under the motor quiescent conditions that is installed on, just have important theory significance and construction value.
Summary of the invention
The purpose of this invention is to provide a kind of brushless dc tachometer that is applicable to employing ccd video camera brshless DC motor, by being installed on outside motor, can realize that the rotor-position when motor is static detects, and need not to change the inner structure of motor body, promoted brshless DC motor and driven reliability and the runnability of controlling.
The technical solution used in the present invention is: the brushless dc tachometer that adopts ccd video camera, comprise ccd video camera and principal computer, described ccd video camera also comprises pre-process circuit and A/D converting unit, and ccd video camera is arranged on directly over the brshless DC motor rotating shaft, be higher than the motor end; Ccd video camera carries out the shooting of image to the motor of rotation after the drive motor operation, obtains analog picture signal; Analog picture signal is through pre-process circuit, remove burr, then by the A/D converting unit, analog picture signal is converted to data image signal, collecting to such an extent that two picture signals are stored in respectively in the principal computer in the time interval, principal computer calculates two picture signals, obtains the brshless DC motor rotating speed.
Adopt the detection method of the brushless dc tachometer of ccd video camera to comprise the steps:
Step 1: mark line is set in rotating shaft
Brshless DC motor rotating shaft p-m rotor position as 0 °, at mark line of this position portrayal, is designated as A; Another mark line is portrayed in 120 ° of positions along clockwise direction from 0 °, is designated as B; Another mark line is portrayed in 240 ° of positions along clockwise direction from 0 °, is designated as C;
Step 2:CCD video camera is installed
Ccd video camera is placed directly over the brshless DC motor rotating shaft, is higher than the position of motor end;
Step 3: motor speed detects
Adopt ccd video camera according to mark line two different brushless DC motor rotor picture signals of constantly taking to be carried out computing, determine thus the displacement that brushless DC motor rotor is measured at image in these two time at intervals, thereby determine the rotating speed of brshless DC motor.If x is the picture signal that gathers for the first time, y is the picture signal that gathers for the second time behind the time interval Δ t, and the distance that x, y move in the Δ t time is Δ L, and then motor speed is
The invention has the beneficial effects as follows:
1, the present invention need not to place brshless DC motor inner position transducer, has avoided change motor body structure, has promoted the operational reliability of motor.
2, adopt the ccd video camera video detecting method, can realize the non-cpntact measurement to motor speed, as long as rotor produces the displacement of a pixel, system can respond, and measuring accuracy is higher.
Description of drawings
Fig. 1 is for adopting the brushless dc tachometer schematic diagram of ccd video camera.
Fig. 2 is brshless DC motor rotating shaft p-m rotor position signature.
Embodiment
As shown in Figure 1, the present invention adopts the brushless dc tachometer of ccd video camera, comprise ccd video camera and principal computer, described ccd video camera also comprises pre-process circuit and A/D converting unit, and ccd video camera is arranged on directly over the brshless DC motor rotating shaft, be higher than the motor end; Ccd video camera carries out the shooting of image to the motor of rotation after the drive motor operation, obtains analog picture signal; Analog picture signal is through pre-process circuit, remove burr, then by the A/D converting unit, analog picture signal is converted to data image signal, collecting to such an extent that two picture signals are stored in respectively in the principal computer in the time interval, principal computer calculates two picture signals, obtains the brshless DC motor rotating speed.
Implementation of the present invention carries out according to following 3 steps:
Step 1: will mark line be set on the machine shaft
With brshless DC motor rotating shaft p-m rotor position as 0 °, at mark line of this position portrayal, be designated as A, another mark line is portrayed in 120 ° of positions along clockwise direction from 0 °, be designated as B, another mark line is portrayed in 240 ° of positions along clockwise direction from 0 °, is designated as C, as shown in Figure 2.
Step 2:CCD video camera is installed
Select the ccd video camera of suitable focal length and pixel, place directly over the machine shaft, be higher than the position of motor end, as shown in Figure 1.
Step 3: motor speed detects
Ccd video camera carries out computing two different rotor picture signals of constantly taking, and determines thus the displacement that rotor is measured at image in these two time at intervals, thereby determines the rotating speed of motor.If x is the picture signal that gathers for the first time, y is the picture signal that gathers for the second time behind the time interval Δ t, and the distance that x, y move in the Δ t time is Δ L, and then motor speed is
Owing to being provided with the mark line of 120 ° of 3 mutual deviations at machine shaft, can guaranteeing in the motor rotary course to have at least a mark line to be in the ccd video camera sensing range.
Claims (2)
1. brushless dc tachometer that adopts ccd video camera, it is characterized in that comprising ccd video camera and principal computer, described ccd video camera also comprises pre-process circuit and A/D converting unit, and ccd video camera is arranged on directly over the brshless DC motor rotating shaft, be higher than the motor end; Ccd video camera carries out the shooting of image to the motor of rotation after the drive motor operation, obtains analog picture signal; Analog picture signal is through pre-process circuit, remove burr, then by the A/D converting unit, analog picture signal is converted to data image signal, collecting to such an extent that two picture signals are stored in respectively in the principal computer in the time interval, principal computer calculates two picture signals, obtains the brshless DC motor rotating speed.
2. the detection method of the brushless dc tachometer of an employing ccd video camera as claimed in claim 1 is characterized in that comprising the steps:
Step 1: mark line is set in rotating shaft
Brshless DC motor rotating shaft p-m rotor position as 0 °, at mark line of this position portrayal, is designated as A; Another mark line is portrayed in 120 ° of positions along clockwise direction from 0 °, is designated as B; Another mark line is portrayed in 240 ° of positions along clockwise direction from 0 °, is designated as C;
Step 2:CCD video camera is installed
Ccd video camera is placed directly over the brshless DC motor rotating shaft, is higher than the position of motor end;
Step 3: motor speed detects
Adopt ccd video camera according to mark line two different brushless DC motor rotor picture signals of constantly taking to be carried out computing, determine thus the displacement that brushless DC motor rotor is measured at image in these two time at intervals, thereby determine the rotating speed of brshless DC motor; X is the picture signal that gathers for the first time, and y is the picture signal that gathers for the second time behind the time interval Δ t, and the distance that x, y move in the Δ t time is Δ L, and then motor speed is
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453889XA CN102944689A (en) | 2012-11-13 | 2012-11-13 | Brushless direct-current motor rotation speed detection device adopting charge coupled device (CCD) camera and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210453889XA CN102944689A (en) | 2012-11-13 | 2012-11-13 | Brushless direct-current motor rotation speed detection device adopting charge coupled device (CCD) camera and method |
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| CN102944689A true CN102944689A (en) | 2013-02-27 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515867A (en) * | 2014-09-19 | 2015-04-15 | 中国人民解放军军事交通学院 | Method for measuring shaft torque, rotary speed and power parameters of power device based on double cameras |
| CN105301276A (en) * | 2015-11-19 | 2016-02-03 | 南宁学院 | Rotation-speed measurement system of low rotation-speed electric motor |
| CN105717321A (en) * | 2016-04-22 | 2016-06-29 | 西安交通大学 | Method for measuring rotating speed of pin gear of cycloidal pin wheel speed reducer |
| CN106197268A (en) * | 2016-07-05 | 2016-12-07 | 苏州格莱威科环保科技有限公司 | The detection device of a kind of motor rotor and detection method |
| CN106225683A (en) * | 2016-08-22 | 2016-12-14 | 国家电网公司 | Vertical hydrogenerator stator silicon steel plate radial displacement detection method |
| CN106546761A (en) * | 2015-09-21 | 2017-03-29 | 上海金艺检测技术有限公司 | The photographic-type rotating speed ONLINE RECOGNITION method of slewing |
| CN106767547A (en) * | 2017-02-15 | 2017-05-31 | 东莞市圣荣自动化科技有限公司 | A kind of vision inspection apparatus for rotor chute detection |
| CN107238727A (en) * | 2017-04-28 | 2017-10-10 | 天津师范大学 | Photoelectric tachometric transducer and detection method based on dynamic visual sensor chip |
| CN108051669A (en) * | 2017-12-06 | 2018-05-18 | 中国能源建设集团华东电力试验研究院有限公司 | The electric adjustment system of special electrical wiring mode |
| CN109278064A (en) * | 2018-09-26 | 2019-01-29 | 东莞市奇趣机器人科技有限公司 | Monitoring device of the rotating machinery with safeguard structure a kind of under radiation environment |
| CN110672873A (en) * | 2019-10-16 | 2020-01-10 | 江苏科技大学 | Brushless direct current motor rotating speed measuring device and using method thereof |
| CN111424399A (en) * | 2020-02-25 | 2020-07-17 | 宁波普尔机电制造有限公司 | Control system and method for variable frequency washing machine based on direct current brushless motor drive |
| CN113504754A (en) * | 2021-07-15 | 2021-10-15 | 哈尔滨电机厂有限责任公司 | Dynamic high-definition image monitoring system for mechanical state of rotor end |
| CN114509089A (en) * | 2021-12-31 | 2022-05-17 | 成都弓网科技有限责任公司 | Non-contact rail transit train speed direction mileage detection method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247072Y (en) * | 2008-05-30 | 2009-05-27 | 安徽宏实光机电高科有限公司 | Rotary encoder based on linear array CCD relevant speed-measuring technology |
| CN201489014U (en) * | 2009-10-09 | 2010-05-26 | 湖南师范大学 | Non-contact type rotary speed measuring system |
-
2012
- 2012-11-13 CN CN201210453889XA patent/CN102944689A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247072Y (en) * | 2008-05-30 | 2009-05-27 | 安徽宏实光机电高科有限公司 | Rotary encoder based on linear array CCD relevant speed-measuring technology |
| CN201489014U (en) * | 2009-10-09 | 2010-05-26 | 湖南师范大学 | Non-contact type rotary speed measuring system |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515867A (en) * | 2014-09-19 | 2015-04-15 | 中国人民解放军军事交通学院 | Method for measuring shaft torque, rotary speed and power parameters of power device based on double cameras |
| CN106546761B (en) * | 2015-09-21 | 2020-11-03 | 上海金艺检测技术有限公司 | Photographic type rotating speed online identification method of rotating equipment |
| CN106546761A (en) * | 2015-09-21 | 2017-03-29 | 上海金艺检测技术有限公司 | The photographic-type rotating speed ONLINE RECOGNITION method of slewing |
| CN105301276A (en) * | 2015-11-19 | 2016-02-03 | 南宁学院 | Rotation-speed measurement system of low rotation-speed electric motor |
| CN105717321A (en) * | 2016-04-22 | 2016-06-29 | 西安交通大学 | Method for measuring rotating speed of pin gear of cycloidal pin wheel speed reducer |
| CN106197268A (en) * | 2016-07-05 | 2016-12-07 | 苏州格莱威科环保科技有限公司 | The detection device of a kind of motor rotor and detection method |
| CN106225683B (en) * | 2016-08-22 | 2019-02-22 | 国家电网公司 | Vertical hydrogenerator stator silicon steel plate radial displacement detection method |
| CN106225683A (en) * | 2016-08-22 | 2016-12-14 | 国家电网公司 | Vertical hydrogenerator stator silicon steel plate radial displacement detection method |
| CN106767547A (en) * | 2017-02-15 | 2017-05-31 | 东莞市圣荣自动化科技有限公司 | A kind of vision inspection apparatus for rotor chute detection |
| CN106767547B (en) * | 2017-02-15 | 2019-05-14 | 南京创智出彩科技有限公司 | A kind of vision inspection apparatus for rotor chute detection |
| CN107238727A (en) * | 2017-04-28 | 2017-10-10 | 天津师范大学 | Photoelectric tachometric transducer and detection method based on dynamic visual sensor chip |
| CN107238727B (en) * | 2017-04-28 | 2020-05-01 | 天津师范大学 | Photoelectric type rotation speed sensor based on dynamic vision sensor chip and detection method |
| CN108051669B (en) * | 2017-12-06 | 2020-01-31 | 中国能源建设集团华东电力试验研究院有限公司 | Electrical debugging system with special electrical wiring mode |
| CN108051669A (en) * | 2017-12-06 | 2018-05-18 | 中国能源建设集团华东电力试验研究院有限公司 | The electric adjustment system of special electrical wiring mode |
| CN109278064A (en) * | 2018-09-26 | 2019-01-29 | 东莞市奇趣机器人科技有限公司 | Monitoring device of the rotating machinery with safeguard structure a kind of under radiation environment |
| CN109278064B (en) * | 2018-09-26 | 2021-07-13 | 东莞市奇趣机器人科技有限公司 | Monitoring device with protective structure for rotating machinery in radiation environment |
| CN110672873A (en) * | 2019-10-16 | 2020-01-10 | 江苏科技大学 | Brushless direct current motor rotating speed measuring device and using method thereof |
| CN111424399A (en) * | 2020-02-25 | 2020-07-17 | 宁波普尔机电制造有限公司 | Control system and method for variable frequency washing machine based on direct current brushless motor drive |
| CN111424399B (en) * | 2020-02-25 | 2022-06-24 | 宁波普尔机电制造有限公司 | Control system and method for variable frequency washing machine based on direct current brushless motor drive |
| CN113504754A (en) * | 2021-07-15 | 2021-10-15 | 哈尔滨电机厂有限责任公司 | Dynamic high-definition image monitoring system for mechanical state of rotor end |
| CN114509089A (en) * | 2021-12-31 | 2022-05-17 | 成都弓网科技有限责任公司 | Non-contact rail transit train speed direction mileage detection method and system |
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Application publication date: 20130227 |