CN203148965U - Motor rotating speed measuring system - Google Patents
Motor rotating speed measuring system Download PDFInfo
- Publication number
- CN203148965U CN203148965U CN 201320152941 CN201320152941U CN203148965U CN 203148965 U CN203148965 U CN 203148965U CN 201320152941 CN201320152941 CN 201320152941 CN 201320152941 U CN201320152941 U CN 201320152941U CN 203148965 U CN203148965 U CN 203148965U
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- module
- rotating speed
- chip microcomputer
- measuring system
- control module
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Abstract
The utility model discloses a motor rotating speed measuring system, which employs a hall sensor to collect the pulse signals of a motor shaft, the rotating speed pulse signals are sent to a one-chip microcomputer after being treated, so that real-time accurate measurement of the motor rotating speed can be realized. The measuring system has the advantages of simple hardware interface circuit and stable and reliable work, and can satisfy the functional requirement of speed regulation.
Description
Technical field
The present invention relates to a kind of for the measuring system of measuring dc motor speed.
Background technology
In recent years, along with the development of Power Electronic Technique, computer technology and microcontroller technology, direct current generator extensively applies to fields such as machine-building electric power metallurgy because it has good startup braking and speed adjusting performance.Because servo drive system constantly develops towards the digital intelligent direction, so the control of rotating speed becomes the key link that realizes in industry measurement and control system.And how to measure rotating speed of motor to realize that the high precision control of rotating speed is become one of outstanding problem of motor application.Rotating speed measurement method commonly used at present has tech-generator velocimetry and photoelectric code disk velocimetry etc.They respectively have merits and demerits, and DC tachometer generator is the wider detecting element of range of application, and its major advantage is that highly sensitive linear error is little, but because it has brush and commutation contact device, thereby reliability is relatively poor, is of limited application; Though normal optical photoelectric coder precision is higher, volume is big, the cost height.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of simple in structure, stable and reliable operation motor speed measurement system.
For solving the problems of the technologies described above, the present invention has adopted a kind of motor speed measurement system, comprise control module, power module, key-press module, tachometric survey circuit module and display module, described power module link control module, for control module provides operating voltage, described control module adopts single-chip microcomputer, described tachometric survey circuit module adopts Hall element to be connected with signal conditioning circuit, described signal conditioning circuit connects single-chip microcomputer, and described key-press module, display module are connected with single-chip microcomputer respectively.
The beneficial effect that the present invention has: this measuring system adopts Hall element to gather the pulse signal of motor shaft, and rotational speed pulse signal is given single-chip microcomputer after treatment, thereby has realized accurately measuring in real time of motor speed.This measuring system hardware interface circuit is simple, and working stability is reliable, has satisfied the functional requirement of speed governing; Under the condition of especially limited at measurement space or the inconvenient installation of sensor, this measuring system has remarkable advantages.
Description of drawings
Fig. 1 is system chart of the present invention.
Embodiment
Be illustrated in figure 1 as a kind of motor speed measurement system, comprise control module, power module, key-press module, tachometric survey circuit module and display module, described power module link control module, for control module provides operating voltage, described control module adopts single-chip microcomputer, described tachometric survey circuit module adopts Hall element to be connected with signal conditioning circuit, and described signal conditioning circuit connects single-chip microcomputer, and described key-press module, display module are connected with single-chip microcomputer respectively.
The course of work of this motor speed measurement system is: import corresponding steering order by button to single-chip microcomputer, rotating speed of motor is transported to single-chip microcomputer by Hall element acquisition pulse signal after amplifying processing, and rotating speed of motor shows by LED.
The control module of this measuring system selects for use AT89S51 as CPU, and it is a kind of low-power consumption, high-performance, in the sheet band 4KB quickflashing able to programme/8 CMOS microcontrollers, compatibility standard MCS-51 order set and the 80C51 pin configuration of erasable read only storer.
Its power circuit adopts a transformer step-down earlier, by rectifier bridge voltage transitions is become DC voltage again.Because the DC voltage that obtains after the transformation may contain AC compounent, handle so by filtering circuit it is carried out filtering again, obtain stable 5V voltage by 7805 then, for single-chip microcomputer provides work required operating voltage.
Display module adopts charactron to carry out the data demonstration.Charactron selects for use 4 to connect positive charactron altogether, and contraposition choosing end utilizes triode S8550 to drive; Display mode is dynamic scan, flows to every charactron and sends graphemic code and the choosing of corresponding position.
This measuring system motor speed measuring circuit is mainly designed based on Hall element, and it is a kind of integrated Sensitive Apparatus, and linear single-ended output can be provided, and its output voltage is proportional to the magnetic field intensity of induction.The magneto sensor that it is inner and high-gain amplifier power regulator are integrated in same chip, make when using very easy.The Hall element of measuring rotating speed detects tach signal from the permanent magnet DC motor shell, 1 week of arbor revolution, produce a certain amount of pulse number, and by the output of hall device circuit, become the count pulse of revolution counter.Control gate time, can realize the tachometer value of the corresponding arbor of count value of counter.
Claims (1)
1. motor speed measurement system, it is characterized in that: comprise control module, power module, key-press module, tachometric survey circuit module and display module, described power module link control module, for control module provides operating voltage, described control module adopts single-chip microcomputer, described tachometric survey circuit module adopts Hall element to be connected with signal conditioning circuit, and described signal conditioning circuit connects single-chip microcomputer, and described key-press module, display module are connected with single-chip microcomputer respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320152941 CN203148965U (en) | 2013-03-31 | 2013-03-31 | Motor rotating speed measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320152941 CN203148965U (en) | 2013-03-31 | 2013-03-31 | Motor rotating speed measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203148965U true CN203148965U (en) | 2013-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320152941 Expired - Fee Related CN203148965U (en) | 2013-03-31 | 2013-03-31 | Motor rotating speed measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203148965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407527A (en) * | 2013-08-23 | 2013-11-27 | 深圳市汇川技术股份有限公司 | Information acquisition circuit of low-voltage electric vehicle |
-
2013
- 2013-03-31 CN CN 201320152941 patent/CN203148965U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407527A (en) * | 2013-08-23 | 2013-11-27 | 深圳市汇川技术股份有限公司 | Information acquisition circuit of low-voltage electric vehicle |
| CN103407527B (en) * | 2013-08-23 | 2016-03-23 | 深圳市汇川技术股份有限公司 | The information acquisition circuit of low-voltage electromobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20140331 |