CN202043068U - Impulse rotational-speed measuring device for DC brush motor - Google Patents
Impulse rotational-speed measuring device for DC brush motor Download PDFInfo
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- CN202043068U CN202043068U CN2011201528539U CN201120152853U CN202043068U CN 202043068 U CN202043068 U CN 202043068U CN 2011201528539 U CN2011201528539 U CN 2011201528539U CN 201120152853 U CN201120152853 U CN 201120152853U CN 202043068 U CN202043068 U CN 202043068U
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- pass filter
- rotational
- measuring device
- brush motor
- speed measuring
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Abstract
The utility model relates to an impulse rotational-speed measuring device for a DC brush motor, and belongs to a device for measuring the rotational speed of a motor in real time. A current detector is respectively connected with the DC brush motor, a power supply and a high-pass filter; and the high-pass filter is sequentially and electrically connected with a magnifier, a low-pass filter, a shaping circuit, a frequency divider and a periodic measuring device. The utility model has the benefits that the working current of the DC brush motor is only required to be detected, and any device is not required to be fixed on the rotating shaft of the motor directly or indirectly, so the impulse rotational-speed measuring device is convenient to mount and use and is no longer restricted by the shape and power of the DC brush motor; and a rotational-speed measuring circuit of the impulse rotational-speed measuring device adopts an all-digital measuring method, so the measuring accuracy is much higher than that of a current-voltage type measuring method.
Description
Technical field
The utility model belongs to a kind of device that motor speed is measured in real time, particularly a kind of device that is used for measuring in real time small-power DC brush drag cup motor speed of being used for.
Background technology
Present known DC electromotor with brush rotation-speed measuring device mainly is divided into two kinds of mechanical fixation formula and electric current, voltage-types.The mechanical fixation formula is that optics catch or magnetic devices are fixed on the DC electromotor with brush rotation axis, the DC electromotor with brush rotation axis rotates and drives its motion, and use the checkout gear be fixed in the nonrotational mechanism to convert light signal or field signal to the signal of telecommunication and measure its frequency or cycle, reach the purpose of measuring motor speed.Electric current, voltage-type are operating current and the voltage that detects motor in real time, by calculating the approximation of motor speed.Existing DC electromotor with brush rotation-speed measuring device mainly has the following disadvantages: 1, mechanical fixation formula apparatus structure complexity, and it is big to install and fix difficulty, and is difficult for microminiaturizedly, is difficult to be used for measuring the rotating speed of miniature cocurrent electromotor; 2, electric current, voltage-type are subject to the motor load variable effect, and certainty of measurement is not high.
Summary of the invention
The utility model provides a kind of DC electromotor with brush pulse rotation-speed measuring device, and to solve mechanical fixation formula apparatus structure complexity, it is big to install and fix difficulty, and is difficult for microminiaturizedly, is difficult to be used for measuring the rotating speed of miniature cocurrent electromotor; Electric current, voltage-type are subject to the motor load variable effect, the problem that certainty of measurement is not high.
The technical scheme that the utility model is taked is: current detector is connected with DC electromotor with brush, power supply, high pass filter respectively, and high pass filter is electrically connected with amplifier, low pass filter, shaping circuit, frequency divider, period measurement device sequence successively.
The current pulsation signal that its commutator produces at the commutation immediate current when rotating by the electric circuit inspection DC electromotor with brush, this signal is measured and calculates the real-time rotating speed of DC electromotor with brush to its cycle by monolithic embedded microcontroller (MCU) behind oversampling circuit amplification, shaping, frequency division.
The beneficial effects of the utility model are, because this device only needs to detect the operating current of DC electromotor with brush, do not need directly or indirectly fixing any device on its rotation axis, thus installation, easy to use, and be not subjected to DC electromotor with brush profile, Power Limitation.The tachometric survey circuit of this device adopts total digitalization to measure, so can obtain higher certainty of measurement than electric current, voltage-type.
Description of drawings
Fig. 1 is a structure of the present utility model and be connected block diagram, and each module title is as follows: DC electromotor with brush 1, current detector 2, power supply 3, high pass filter 4, amplifier 5, low pass filter 6, shaping circuit 7, frequency divider 8, period measurement device 9;
Fig. 2 is the circuit theory diagrams of a kind of concrete embodiment of the present utility model.
Embodiment
In Fig. 1, current detector 2 is connected with DC electromotor with brush 1, power supply 3, high pass filter 4 respectively, and high pass filter 4 is electrically connected with amplifier 5, low pass filter 6, shaping circuit 7, frequency divider 8, period measurement device 9 orders successively.
The connection of each intermodule of the utility model and operation principle are such: during DC electromotor with brush 1 work, its inner commutator commutation moment can make its operating current produce the decline of moment, current detector 2 descends this electric current and detects and convert to voltage signal as signal, after this voltage signal process high pass filter filtering flip-flop, be exaggerated device 5 amplitude limits and amplify.Signal after the amplification flows to shaping circuit 7 shapings after by the low pass filter filters out clutter interference becomes square-wave signal, carry out two divided-frequency through frequency divider 8 again, become the standard square-wave signal of duty ratio 50% and measure its cycle length, draw the real-time rotating speed of DC electromotor with brush 1 after as calculated by period measurement device 9.
Claims (1)
1. DC electromotor with brush pulse rotation-speed measuring device, it is characterized in that: current detector is connected with DC electromotor with brush, power supply, high pass filter respectively, and high pass filter is electrically connected with amplifier, low pass filter, shaping circuit, frequency divider, period measurement device sequence successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201528539U CN202043068U (en) | 2011-05-13 | 2011-05-13 | Impulse rotational-speed measuring device for DC brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201528539U CN202043068U (en) | 2011-05-13 | 2011-05-13 | Impulse rotational-speed measuring device for DC brush motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202043068U true CN202043068U (en) | 2011-11-16 |
Family
ID=44970493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201528539U Expired - Lifetime CN202043068U (en) | 2011-05-13 | 2011-05-13 | Impulse rotational-speed measuring device for DC brush motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202043068U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109387660A (en) * | 2017-08-14 | 2019-02-26 | 广西万创数据科技有限责任公司 | A kind of accurately motor speed measuring method |
| CN109450301A (en) * | 2018-10-17 | 2019-03-08 | 迪瑞医疗科技股份有限公司 | A kind of motor speed adjusts circuit and device |
-
2011
- 2011-05-13 CN CN2011201528539U patent/CN202043068U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109387660A (en) * | 2017-08-14 | 2019-02-26 | 广西万创数据科技有限责任公司 | A kind of accurately motor speed measuring method |
| CN109450301A (en) * | 2018-10-17 | 2019-03-08 | 迪瑞医疗科技股份有限公司 | A kind of motor speed adjusts circuit and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 130012 Changchun province high tech Zone, the River Street, No. 95, No. Patentee after: Medical Polytron Technologies Inc Address before: 130012 Changchun province high tech Zone, the River Street, No. 95, No. Patentee before: Changchun Dirui Medical Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |