CN201877986U - EPA (Ethernet for Plant Automation)-based motor digital magnetic encoder - Google Patents
EPA (Ethernet for Plant Automation)-based motor digital magnetic encoder Download PDFInfo
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- CN201877986U CN201877986U CN2010202230768U CN201020223076U CN201877986U CN 201877986 U CN201877986 U CN 201877986U CN 2010202230768 U CN2010202230768 U CN 2010202230768U CN 201020223076 U CN201020223076 U CN 201020223076U CN 201877986 U CN201877986 U CN 201877986U
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Abstract
The utility model discloses an EPA (Ethernet for Plant Automation)-based motor digital magnetic encoder, comprising a power supply module which is used for supplying power for each unit of the motor digital magnetic encoder, a magnetic encoding chip which is used for sensing the position change of a magnet and converting the position change into an electric signal, a singlechip which is used for receiving the electric signal formed by converting the position change transmitted by the magnetic encoding chip and is further used for converting the electric signal into position transform information by means of built-in programs, and an EPA communication module which is connected with the singlechip and used for converting the signal transmitted by the singlechip into a digital signal supported by an EPA protocol and then transmitting the digital signal to an upper control machine. The EPA-based motor digital magnetic encoder provided by the utility model has the advantages that the detection process of position information is simplified, the position and speed control of the motor is more convenient, and the EPA-based motor digital magnetic encoder represents the development direction of industrial control networking.
Description
Technical field
The utility model relates to industrial sensor manufacturing technology field, is specifically related to a kind of motor numeral magnetic coder based on EPA.
Background technology
At the Industry Control magic horn, often need be detected the position of some parts (for example bearing of motor etc.) and speed or rotating speed.For this reason, the control field of motor or other equipment often adopts motor encoder to detect the rotating speed, position etc. of some parts, and in real time corresponding message transmission is given control centre, so that control centre in time grasps the running status of equipment end.
Prior art is a kind of to be to adopt the implementation of photoelectric encoder as motor encoder, it mainly comprises grating dish, photoelectric detection system and conversion of signals card, it uses photoelectricity transformation principle, the photoelectric sensor that is positioned at grating dish both sides detects the periodically variable signal of telecommunication, this signal is through several phase signals of conversion of signals card output-response motor change over condition, but it is subjected to the influence of environment bigger, for example when light is blocked, promptly can't record accurate data.
For this reason, favored so that the motor encoder of magnetic coder is more and more, its principle is to utilize magnetic principles to detect linear displacement, and export the method for corresponding pulse number, it has solved traditional opto-electronic conversion encoder and has received the bigger problem of environmental impact, but because it mainly is the detection that realizes position and speed by the number of calculating orthogonal pulses, this traditional metering system not only needs single-ended pwm signal of differential signal transducer or A/B pulses switch to become differential signal, again by the output of differential signal output interface.But mainly there is following defective in it:
At first, poor compatibility, the trend along with industry networking chemical control system makes various device can be called the direction of development by Web-compatible, and the differential signal output interface does not then possess the compatibility to network;
Secondly, the differential signal transducer is interfered easily, just can't recover in case occur disturbing.
And being the mainstream technology of the business computer communications fields such as Ethernet, TCP/IP, EPA (Ethernet for Plant Automation) agreement directly applies to communication between the Industry Control field apparatus, and on this basis, the open network communications platform that is applied to communicate by letter between industrial field device of foundation.It is a kind of brand-new open real-time ethernet standard that is applicable to industrial field device, the IT technology of a large amount of maturations is applied to industrial control system, utilize efficient, stable, the certainty communication scheduling strategy of the Ethernet of standard and UDP/IP agreement, for the real-time working that is applicable to field apparatus has been set up a kind of brand-new standard, certainty and real-time that Ethernet is used for communicating by letter between industrial field device have been solved, network power supply, can operate mutually, network security, a reliability and a guardian technique difficult problem such as anti-interference, developed distributed network control system, at first at chemical industry based on EPA, succeed on the process unitss such as pharmacy and use.
How the EPA technology is applied to motor, strengthens the compatibility of industrial equipment, be called the problem of a primary study of this area.
The utility model content
At above-mentioned defective, the purpose of this utility model provides a kind of motor numeral magnetic coder based on EPA, and to solve the motor encoder poor compatibility of prior art, directly networking control, and transmission signals is disturbed technical problem easily.
For achieving the above object, the utility model has adopted following technical scheme:
A kind of motor numeral magnetic coder based on EPA comprises: a power module, in order to give motor numeral magnetic coder each unit power supply; One magnetic coding chip, it is corresponding with the magnet that is arranged on the parts that need detection speed and position, in order to convert the signal of telecommunication to by the variation of sensing magnet positions and with variation; One single-chip microcomputer, it links to each other with this magnetic coding chip, and accepts the signal of telecommunication of the evolution of this magnetic coding chip transmission, and converts the electrical signal to evolution information by plug-in; And an EPA communication module, it links to each other with this single-chip microcomputer, the digital signal that becomes the EPA agreement to support in order to conversion of signals with this single-chip microcomputer transmission, and transfer to upper control machine.
According to the described motor numeral magnetic coder based on EPA of the utility model preferred embodiment, this EPA communication module further comprises:
One EPA conversion chip converts the digital code stream of supporting the EPA agreement in order to the data code flow after single-chip microcomputer is calculated; And an EPA communication interface, by this EPA communication interface, this motor numeral magnetic coder is connected with the upper control machine realization that is connected Ethernet.
According to the described motor numeral magnetic coder based on EPA of the utility model preferred embodiment, this power module is a linear voltage regulator, with thinking that the interior variant module of this motor numeral magnetic coder provides the voltage of adaptation.
According to the described motor numeral magnetic coder of the utility model preferred embodiment, also comprise based on EPA:
One differential signal conversion module, it is connected with this magnetic coding chip, converts differential signal in order to the pwm signal with this encoder chip transmission, and output.
According to the described motor numeral magnetic coder based on EPA of the utility model preferred embodiment, this differential signal conversion module further comprises:
One differential signal conversion chip, it converts differential signal in order to the single-ended signal with the transmission of magnetic coding chip; And a differential signal output interface, it connects upper control machine, in order to the differential signal output with this differential signal conversion module conversion.
According to the described motor numeral magnetic coder based on EPA of the utility model preferred embodiment, this magnetic coding chip is for liking the microelectronic AS5145 magnetic encoder of land productivity.
According to the described motor numeral magnetic coder based on EPA of the utility model preferred embodiment, this magnetic coding chip with the magnet positions that needs on the measurement component be set adapt.
Owing to adopted above technical scheme, make the utility model than prior art, have following advantage and good effect:
At first, the utility model has adopted the EPA communication module in motor encoder, thereby has strengthened the real-time of message transmission and for the compatibility of Ethernet, thereby makes industrial network control motor encoder be called possibility, has represented the development in future direction;
Secondly, the utility model adopts the implementation of magnetic coding chip as measurement component position and rotating speed, has not only solved traditional photoelectric coding equipment bigger problem affected by environment, also has the strong characteristics of antijamming capability;
Once more, the utility model is provided with differential signal conversion module simultaneously when the EPA communication module is set, and therefore, the utility model equally has compatible preferably to the equipment of original difference compatibility.
Description of drawings
Fig. 1 is the theory diagram of a kind of motor magnetic coder of the present utility model;
Fig. 2 is the realization block diagram of first embodiment of the present utility model;
Fig. 3 is the realization block diagram of second embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing several preferred embodiments of the present utility model is described in detail, but the utility model is not restricted to these embodiment.The utility model contain any on marrow of the present utility model and scope, make substitute, modification, equivalent method and scheme.Understand for the public is had completely the utility model, in following the utility model preferred embodiment, describe concrete details in detail, and do not have the description of these details also can understand the utility model fully for a person skilled in the art.
Core concept of the present utility model is, adopt magnetic coder to replace traditional photoelectric encoder that position component and angle or speed are detected, and the result that will detect converts digital signal to, convert the EPA digital signal to by the EPA communication module, Ethernet by compatibility is transferred to host computer, thereby realize compatibility preferably, and data are carried out real-time Transmission, and reduce and disturb.
Please refer to Fig. 1, a kind of schematic diagram of the motor numeral magnetic coder 1 based on EPA, the motor numeral magnetic coder 10 based on EPA of the present invention comprises: a power module 14, in order to give motor numeral magnetic coder each unit power supply; One magnetic coding chip 12, it is corresponding with the magnet that is arranged on the parts that need detection speed and position, in order to convert the signal of telecommunication to by the variation of sensing magnet positions and with variation; One single-chip microcomputer 13, it links to each other with this magnetic coding chip 12, and accepts the signal of telecommunication of the evolution of these magnetic coding chip 12 transmission, and converts the electrical signal to evolution information by plug-in; And an EPA communication module 11, it links to each other with this single-chip microcomputer 3, the digital signal that becomes the EPA agreement to support in order to conversion of signals with these single-chip microcomputer 13 transmission, and transfer to upper control machine 30 by Ethernet 20.
Embodiment one
Please refer to Fig. 2, Fig. 2 is the structured flowchart of a kind of implementation of the present utility model, and power module 14 adopts a kind of linear voltage regulator 24 to realize in this embodiment.Because therefore the needed operating voltage difference of each module on the motor encoder disposes this linear voltage regulator 24, converts the externally fed power source voltage to voltage that each module is suitable for.
Thereby magnetic coding chip 12 is realized the position, angle of rotor and the measurement of speed by the angle position of magnet on the detection-sensitive motor rotor, when specific implementation, should be positioned at the centre of encoder, and with rotor on the distance of magnet suitable, guarantee the validity of its induction.In embodiment of the present utility model, the magnetic coder chip adopts Austrian microelectronic AS5145 chip, it has 12 bit resolutions, in the scope of a circle 360 degree, can discern 4096 positions, its step value is 0.0879 °, can provide data with the form of serial bit stream or pwm signal and analog voltage signal, embodies the state variation of rotor, and can be by to the OTP of inside programming, export 10 or 12 s' exportable quadrature A/B pulse and index signal.
The OTP of single-chip microcomputer 13 (one time Programable) chip is the burning calculation procedure in advance, thereby thereby calculate absolute figures such as drawing concrete position, angle, speed, and numerical value further is transferred to EPA communication module 4 according to the signal of magnetic coding chip output.
EPA communication module 11 further comprises EPA communication interface 41 and EPA conversion chip 40 in the present embodiment, and by EPA communication interface 41, motor numeral magnetic coder is realized being connected with the upper control machine that is connected Ethernet.EPA conversion chip 40 is then born main data converting function, the absolute figure that calculates in the single-chip microcomputer 13 is converted to the digital code stream that meets the EPA consensus standard, again further by being transferred to Ethernet with the EPA communication interface 41 of Ethernet compatibility, and further be transferred to upper control machine and detect and handle, for example analyze, add up, safeguard or the like subsequent operation.
Embodiment two
Please refer to Fig. 3, structured flowchart for second embodiment of the motor numeral magnetic coder based on EPA of the present utility model, similar with embodiment one, the same linear voltage regulator that adopts to provide suitable voltage to the each several part of motor encoder as the implementation of power supply module, and keeps voltage constant in safe range.
And magnetic coding chip and single-chip microcomputer are all similar with embodiment one, and principle is also similar, does not add at this and gives unnecessary details.
The difference part is that in the present embodiment, the magnetic coding chip has electrically connected differential signal conversion module 25 in addition, and differential signal conversion module 25 has further comprised differential signal output interface 26 and differential signal conversion chip 27.After the effect of differential signal conversion chip 27 is magnetic coding chip induced magnet rotated to conversion of signals become differential signal, and transfer to host computer by differential signal output interface 26.For example convert single-ended pwm signal and A/B pulse signal and index signal to differential signal, strengthen anti-interference.
The advantage of this embodiment is the compatibility that not only satisfies Ethernet, can also satisfy the requirement to the equipment of original compatible differential signal, strengthens its autgmentability and compatibility.
In sum,, make the utility model, have following advantage and good effect than prior art owing to adopted above technical scheme:
At first, the utility model has adopted the EPA communication module in motor encoder, thereby has strengthened the real-time of message transmission and for the compatibility of Ethernet, thereby makes industrial network control motor encoder be called possibility, has represented the development in future direction;
Secondly, the utility model adopts the implementation of magnetic coding chip as measurement component position and rotating speed, has not only solved traditional photoelectric coding equipment bigger problem affected by environment, also has the strong characteristics of antijamming capability;
Once more, the utility model is provided with differential signal conversion module simultaneously when the EPA communication module is set, and therefore, the utility model equally has compatible preferably to the equipment of original difference compatibility.
The utility model preferred embodiment just is used for helping to set forth the utility model.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this utility model yet and only is described embodiment.Obviously, according to the content of this specification, can make many modifications and variations.These embodiment are chosen and specifically described to this specification, is in order to explain principle of the present utility model and practical application better, thereby the technical field technical staff can utilize the utility model well under making.The utility model only is subjected to the restriction of claims and four corner and equivalent.
Claims (7)
1. the motor numeral magnetic coder based on EPA is characterized in that, comprising:
One power module is in order to magnetic coding chip, single-chip microcomputer and the power supply of EPA communication module of giving motor numeral magnetic coder;
One magnetic coding chip, it is corresponding with the magnet that is arranged on the parts that need detection speed and position, in order to convert the signal of telecommunication to by the variation of sensing magnet positions and with variation;
One single-chip microcomputer, it links to each other with this magnetic coding chip, and accepts the signal of telecommunication of the evolution of this magnetic coding chip transmission, and converts the electrical signal to evolution information by plug-in; And
One EPA communication module, it links to each other with this single-chip microcomputer, becomes the digital signal of EPA agreement support in order to the conversion of signals with this single-chip microcomputer transmission, and transfers to upper control machine.
2. the motor numeral magnetic coder based on EPA as claimed in claim 1 is characterized in that this EPA communication module further comprises:
One EPA conversion chip converts the digital code stream of supporting the EPA agreement in order to the data code flow after single-chip microcomputer is calculated; And
One EPA communication interface, by this EPA communication interface, this motor numeral magnetic coder is realized being connected with the upper control machine that is connected Ethernet.
3. the motor numeral magnetic coder based on EPA as claimed in claim 1 is characterized in that this power module is a linear voltage regulator, with thinking that interior magnetic coding chip, single-chip microcomputer and the EPA communication module of this motor numeral magnetic coder provides the voltage of adaptation.
4. the motor numeral magnetic coder based on EPA as claimed in claim 1 is characterized in that, also comprises:
One differential signal conversion module, it is connected with this magnetic coding chip, converts differential signal in order to the pwm signal with this encoder chip transmission, and output.
5. the motor numeral magnetic coder based on EPA as claimed in claim 4 is characterized in that this differential signal conversion module further comprises:
One differential signal conversion chip, it converts differential signal in order to the single-ended signal with the transmission of magnetic coding chip; And
One differential signal output interface, it connects upper control machine, in order to the differential signal output with this differential signal conversion module conversion.
6. the motor numeral magnetic coder based on EPA as claimed in claim 1 is characterized in that this magnetic coding chip is for liking the microelectronic AS5145 magnetic encoder of land productivity.
7. the motor numeral magnetic coder based on EPA as claimed in claim 1 is characterized in that, this magnetic coding chip with the magnet positions that needs on the measurement component be set adapt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202230768U CN201877986U (en) | 2010-06-10 | 2010-06-10 | EPA (Ethernet for Plant Automation)-based motor digital magnetic encoder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202230768U CN201877986U (en) | 2010-06-10 | 2010-06-10 | EPA (Ethernet for Plant Automation)-based motor digital magnetic encoder |
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| CN201877986U true CN201877986U (en) | 2011-06-22 |
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| CN2010202230768U Expired - Fee Related CN201877986U (en) | 2010-06-10 | 2010-06-10 | EPA (Ethernet for Plant Automation)-based motor digital magnetic encoder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105046151A (en) * | 2015-07-06 | 2015-11-11 | 北京科技大学 | Code disk protective apparatus and method for rotary device |
| CN105549475A (en) * | 2015-12-21 | 2016-05-04 | 江西百胜智能科技股份有限公司 | Encoder limiting method |
| CN108873770A (en) * | 2018-05-09 | 2018-11-23 | 中国科学院长春光学精密机械与物理研究所 | AS5048A magnetic coder control method and system based on state machine |
-
2010
- 2010-06-10 CN CN2010202230768U patent/CN201877986U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105046151A (en) * | 2015-07-06 | 2015-11-11 | 北京科技大学 | Code disk protective apparatus and method for rotary device |
| CN105046151B (en) * | 2015-07-06 | 2018-04-24 | 北京科技大学 | A kind of code-disc protective device and method for rotating kind equipment |
| CN105549475A (en) * | 2015-12-21 | 2016-05-04 | 江西百胜智能科技股份有限公司 | Encoder limiting method |
| CN108873770A (en) * | 2018-05-09 | 2018-11-23 | 中国科学院长春光学精密机械与物理研究所 | AS5048A magnetic coder control method and system based on state machine |
| CN108873770B (en) * | 2018-05-09 | 2021-03-19 | 中国科学院长春光学精密机械与物理研究所 | AS5048A magnetic encoder control method and system based on state machine |
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