CN203274770U - Integrated encoder for rotor location detection of motor and valve location stroke detection of valve - Google Patents
Integrated encoder for rotor location detection of motor and valve location stroke detection of valve Download PDFInfo
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- CN203274770U CN203274770U CN 201320209865 CN201320209865U CN203274770U CN 203274770 U CN203274770 U CN 203274770U CN 201320209865 CN201320209865 CN 201320209865 CN 201320209865 U CN201320209865 U CN 201320209865U CN 203274770 U CN203274770 U CN 203274770U
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Abstract
The utility model discloses an integrated encoder for rotor location detection of a motor and valve location stroke detection of a valve. The integrated encoder comprises a stroke input shaft, a stroke input gear, a pedestal, a control circuit, etc. Through an coaxial apparatus arranged at a coaxial tail end of the motor, the rotating speed of a first layer is improved through a 1 to 5 acceleration gear tray, and binary 8-bit absolute coded values corresponding to code discs are continuously read by a photoelectric sensor code fetch circuit for the rotor location detection of the motor. A second layer, a third layer and a fourth layer are first decelerated through deceleration gear tray with a total ratio of 40 to 1, and binary 16-bit absolute coded values corresponding to rotation locations of code discs in the second layer, the third layer and the fourth layer are continuously read by the photoelectric sensor code fetch circuit and then are transmitted to a level converting circuit, and finally detected rotor location signals and value opening signals are shaped by an optical coupler and then are transmitted to corresponding processors for logical judgement. Therefore, high-precision location of the motor location and the valve location of the valve can be simultaneously realized on the same encoder.
Description
Technical field
The utility model relates to motor rotor position detection and the valve stroke detection of electric valve executing mechanism system, is specifically related to a kind of position probing of switch reluctance machine rotor and the travel position of valve position and detects integrated scrambler.
Background technology
Electric valve executing mechanism based on switched reluctance machines is the novel valve electric operator that function is strong, reliability is high, and it can satisfy the needs of nuclear power station, thermal power plant, petrochemical industry middle and high end control requirement.Select the controller of the switched reluctance machines of high reliability, can effectively control the speed of motor, and realize that the accurate positioning of valve stroke is reliable in process control, can realize the good protection of valve and topworks.Therefore, the detection of the position probing of switched reluctance machines and valve stroke is the important research content that guarantees system reliability and accuracy.
The purpose of switched reluctance machines position probing is to determine the relative position of stator and rotor, to control corresponding phase winding break-make; Common position detector has photosensitive formula, Mageneto-sensitive type and approach switch etc. to contain the position probing scheme of machinery, what adopted general switch magnetoresistance motor rotor position test section is photoelectric position sensor, photoelectric position sensor is comprised of two parts: slot optical coupling and with the isostructural fluted disc of motor rotor, fluted disc can pass freely through the U-shaped groove of slot optical coupling with the coaxial installation of motor, the tooth of fluted disc; Block the light path of slot optical coupling when the tooth of fluted disc, optocoupler is in cut-off state, and when the groove of fluted disc passed through slot optical coupling, the light path of optocoupler was open-minded, and optocoupler is in conducting state; Therefore when the motor rotor continuous rotation (fluted disc is also followed the synchronized rotation of rotor), three slot optical couplings will be exported three road signals, and the shaping through peripheral circuit obtains three tunnel square-wave signals relevant to rotor-position.It is by stroke input shaft, stroke input gear that valve stroke detects, and employing photoelectricity transformation principle, read continuously 6 specific coding of the binary one corresponding with the code-disc position of rotation by photoelectric sensor code fetch circuit, and deliver to level shifting circuit, by optical coupler with the level signal shaping, convert 0～30V Voltage-output to the outer control system of this journey controller, convert the angular displacement of stroke output shaft to corresponding digital quantity, thereby confirm the absolute position of valve.
The fluted disc of above-mentioned existing switched reluctance machines position detecting device is the same with the size of rotor, being not easy to miniaturization processes, and switched reluctance machines position probing and valve stroke testing agency adopt the form that minute is arranged, not only take electric valve and carry out the space of structure, and increased the failure rate of pick-up unit, reduced the accuracy and the reliability that detect.
Summary of the invention
The utility model is just in order to address the above problem, a kind of rotor-position of detector switch reluctance motor simultaneously and the detection scrambler of valve position stroke are provided, its purpose is: improve motor rotor position and detect the precision that detects with valve position, satisfy the requirement of working control precision; And the solution switch magnetoresistance motor rotor position detects and the problem of implementation of electrically operated valve valve position detection in the motor output shaft side.
Technical solution of the present utility model:
A kind of motor rotor position detects and valve position stroke detection one scrambler, comprise stroke input shaft, stroke input gear, base and the control circuit that is formed by photoelectric sensor code fetch circuit and level shifting circuit, fixing then stroke input gear, increase gear and reduction gearing on described stroke input shaft, described increase gear is meshed with motor rotor position ground floor counting gear, fixing then code-disc and the first code fetch circuit of 1 ~ 4 below described rotor-position ground floor counting gear; The gear driven rotor-position second layer counting gear that is meshed with rotor-position ground floor counting gear rotates, fixing then code-disc and the second code fetch circuit of 5 ~ 8 below described rotor-position second layer counting gear; Described reduction gearing is meshed with valve position the first bottom counting gear, fixing then the 1st～4 bit code dish and the 3rd code fetch circuit on described valve position the first bottom counting gear, gear driven valve position the second bottom counting gear that is meshed with valve position the first bottom counting gear rotates; Fixing then the 5th～8 bit code dish and the 4th code fetch circuit on described valve position the second bottom counting gear, the second neutral gear that is meshed with described valve position the second bottom counting gear drives the first top layer counting gear and rotates, fixing then the 9th～12 bit code dish and the 5th code fetch circuit under the first top layer counting gear, the first neutral gear that is meshed with described the first top layer counting gear drives the second top layer counting gear and rotates, fixing then the 13rd～16 bit code dish and the 6th code fetch circuit under the second top layer counting gear.
Same shaft tail end at switched reluctance machines arranges coaxial device, and ground floor is by 1 to 5 speedup fluted disc raising rotating speed, then by photoelectric sensor code fetch circuit read continuously with code-disc on corresponding 8 specific coding values of scale-of-two detect as motor rotor position.The second layer, the 3rd layer, the 4th layer are at first by always reducing rotating speed than the deceleration fluted disc that is 40 to 1; Again by photoelectric sensor code fetch circuit read continuously with second and third, corresponding 6 specific coding of binary one of code-disc position of rotation in four layers, and deliver to level shifting circuit; By optical coupler, rotor-position signal and the valve opening signal shaping that detects is judged use as delivering to corresponding processor as logic at last, thereby can realize simultaneously on a scrambler that motor position detects and the high precision of the valve position detection of valve detects.
This one scrambler adopts the multiple circles absolute encoder, and encodes by the Gray code mode, is provided with reflective photoelectric sensor below code-disc.
Compared with prior art, the beneficial effects of the utility model: combine by motor position being detected detect with valve position, realize that high-precision motor position detects and the valve position detection of valve; Adopt the multiple circles absolute encoder, and encode by the Gray code mode, when realizing the conversion code value, when changing to consecutive number from any number, only there is the one digit number code to change, if the delineation of arbitrary code channel has error, as long as error is not too large, and only may have a code channel reading error to occur, the error of generation equals at most a bit of lowest order, reduces read false rate; Adopt the parallel port signal transmission form, according to anglec of rotation output pulse signal, be converted into position signalling according to the pulse signal of exporting; Thereby realize the raising of position probing resolution and the acquisition that power down does not affect coded data.
Description of drawings
Fig. 1: the structural principle schematic diagram of the utility model scrambler.
Fig. 2: gray encoding dish structural principle schematic diagram of the present utility model.
Fig. 3: output encoder value modulate circuit figure of the present utility model.
Fig. 4: encoder structural principle schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
The motor rotor position of the present embodiment detects and valve position stroke detection one scrambler, is that the rotor-position of realizing the switched reluctance machines of 12/8 structure detects and the valve position detection of the valve that switched reluctance machines drives.
As shown in Figure 1, motor rotor position detects control circuit, increase gear 5 and the reduction gearing 6 that comprises stroke input shaft 2, stroke input gear 1, base 3, is comprised of photoelectric sensor code fetch circuit and level shifting circuit with valve position stroke detection one scrambler, increase gear 5 is meshed with motor rotor position ground floor counting gear 29, fixing then code-disc 22 and the first code fetch circuit 21 of 1 ~ 4 below rotor-position ground floor counting gear 29; The gear driven rotor-position second layer counting gear 27 that is meshed with rotor-position ground floor counting gear 29 rotates, fixing then code-disc 26 and the second code fetch circuit 24 of 5 ~ 8 below rotor-position second layer counting gear 27; Reduction gearing 6 is meshed with valve position the first bottom counting gear 28, fixing then the 1st～4 bit code dish 8 and the 3rd code fetch circuit 9 on valve position the first bottom counting gear 28, gear driven valve position the second bottom counting gear 17 that is meshed with valve position the first bottom counting gear 28 rotates; Fixing then the 5th～8 bit code dish 16 and the 4th code fetch circuit 20 on valve position the second bottom counting gear 17, the second neutral gear 15 that is meshed with valve position the second bottom counting gear 17 drives the first top layer counting gear 11 and rotates, at the first top layer counting gear 11 times fixing then the 9th～12 bit code dish 10 and the 5th code fetch circuit 10, the first neutral gear 14 that is meshed with the first top layer counting gear 11 drives the second top layer counting gear 18 and rotates, at the second top layer counting gear 18 times fixing then the 13rd～16 bit code dish 19 and the 6th code fetch circuit 20.
In switch magnetoresistance motor rotor position detects, adopt 8 absolute encoders, be divided into 24 bit code dishes, the code-disc schematic diagram is arranged with 4 reflective photoelectric sensors 4 as shown in Figure 2 below each code-disc, respectively corresponding 4 encoded radios, there is no reflected light when rotating to code-disc black, the output high level has the reflected light output low level when white, thereby formation pulse square wave, then the value of the output of the modulate circuit by as shown in Figure 3 code-disc; The code-disc 22 of 1 ~ 4 is low four in Fig. 1 rotor position, the code-disc 26 that rotor-position is 5 ~ 8 is high four, speedup fluted disc 5 is 48 to 240 with the number of teeth of ground floor counting gear 29 in Fig. 1, because the rotor number of poles is 8, stator is 12, turning the angle that moves a step is 7.5 °, and therefore the number of teeth being set is 48=360 °/7.5 °; And obtain by 1 to 5 speedup, 7.5 ° of speedups of the every rotation of motor obtain rotating 1.5 °=360 °/240, thus namely 7.5 ° of scramblers of every rotation will produce the angle that 5 encoded radios are determined electric machine rotation, therefore improve resolution.
In the middle of valve position detects, due to the speed reduction unit that has 40 to 1 between motor output shaft and valve, therefore first be down to valve rotating speed consistent by reduction gearing 6 with the first bottom counting gear 28 in the device for detecting valve position of motor side, read the valve position value of 360 ° by the scrambler of 16, accuracy of detection is 360 °/2 again
16=0.00549 °; The scrambler of 16 forms by the code-disc as shown in Figure 2 of 44, and its principle is consistent with the code-disc in the said motor detecting apparatus for rotor position no longer burdensome at this.
Shown in Figure 3 is the code fetch signal conditioning circuit, and the principle of work of modulate circuit is by amplifier TL082, the code fetch signal to be amplified, then through phase inverter CD4069, the shaping of code fetch signal inversion is obtained encoded radio.
Rotor-position in the utility model detects and valve position detection all adopts multiple circles absolute encoder as shown in Figure 4, and encode by the Gray code mode, the principle of work of multiple circles absolute encoder is, when the center code-disc rotates, by another group code dish of gear drive (or multiple sets of teeth wheel, many group codes dish), increase again the coding of the number of turns on the basis of individual pen coding, to enlarge the measurement range of scrambler, it is to determine coding by mechanical location, not each position encoded uniquely do not repeat, and need not memory.
Claims (4)
1. a motor rotor position detects and valve position stroke detection one scrambler, comprise stroke input shaft (2), stroke input gear (1), base (3) and the control circuit that is formed by photoelectric sensor code fetch circuit and level shifting circuit, it is characterized in that, at the upper fixing then stroke input gear (1) of described stroke input shaft (2), increase gear (5) and reduction gearing (6), described increase gear (5) is meshed with motor rotor position ground floor counting gear (29), fixing then code-disc (22) and the first code fetch circuit (21) of 1 ~ 4 below described rotor-position ground floor counting gear (29), the gear driven rotor-position second layer counting gear (27) that is meshed with rotor-position ground floor counting gear (29) rotates, fixing then code-disc (26) and the second code fetch circuit (24) of 5 ~ 8 below described rotor-position second layer counting gear (27), described reduction gearing (6) is meshed with valve position the first bottom counting gear (28), at described valve position the first bottom counting gear (28) upper fixing then the 1st～4 bit code dish (8) and the 3rd code fetch circuit (9), gear driven valve position the second bottom counting gear (17) that is meshed with valve position the first bottom counting gear (28) rotates, at described valve position the second bottom counting gear (17) upper fixing then the 5th～8 bit code dish (16) and the 4th code fetch circuit (20), the second neutral gear (15) that is meshed with described valve position the second bottom counting gear (17) drives the first top layer counting gear (11) and rotates, at the first top layer counting gear (11) lower fixing then the 9th～12 bit code dish (10) and the 5th code fetch circuit (10), the first neutral gear (14) that is meshed with described the first top layer counting gear (11) drives the second top layer counting gear (18) and rotates, at the second top layer counting gear (18) lower fixing then the 13rd～16 bit code dish (19) and the 6th code fetch circuit (20).
2. a kind of motor rotor position according to claim 1 detects and valve position stroke detection one scrambler, it is characterized in that, the number of teeth of described speedup fluted disc (5) and rotor-position ground floor counting gear (29) is always than being 1:5; The number of teeth of described reduction gearing (6) and valve position the first bottom counting gear (28) is always than being 40:1.
3. a kind of motor rotor position according to claim 1 and 2 detects and valve position stroke detection one scrambler, it is characterized in that, is provided with reflective photoelectric sensor below code-disc.
4. a kind of motor rotor position according to claim 3 detects and valve position stroke detection one scrambler, it is characterized in that, described one scrambler adopts the multiple circles absolute encoder, and encodes by the Gray code mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320209865 CN203274770U (en) | 2013-04-24 | 2013-04-24 | Integrated encoder for rotor location detection of motor and valve location stroke detection of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320209865 CN203274770U (en) | 2013-04-24 | 2013-04-24 | Integrated encoder for rotor location detection of motor and valve location stroke detection of valve |
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| CN203274770U true CN203274770U (en) | 2013-11-06 |
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| CN 201320209865 Withdrawn - After Issue CN203274770U (en) | 2013-04-24 | 2013-04-24 | Integrated encoder for rotor location detection of motor and valve location stroke detection of valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245371A (en) * | 2013-04-24 | 2013-08-14 | 江苏大学 | Position detection and valve position and stroke detection integral coder for motor rotator |
| CN108188837A (en) * | 2018-02-09 | 2018-06-22 | 滁州职业技术学院 | A kind of dual light-barrier type grooving rotation angle positioning device |
| CN108258953A (en) * | 2018-02-26 | 2018-07-06 | 邳州高新区新能源技术研究院有限公司 | motor torque control system and control method |
-
2013
- 2013-04-24 CN CN 201320209865 patent/CN203274770U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245371A (en) * | 2013-04-24 | 2013-08-14 | 江苏大学 | Position detection and valve position and stroke detection integral coder for motor rotator |
| CN103245371B (en) * | 2013-04-24 | 2016-04-06 | 江苏大学 | A kind of motor rotor position detects and valve position stroke detection integral coder |
| CN108188837A (en) * | 2018-02-09 | 2018-06-22 | 滁州职业技术学院 | A kind of dual light-barrier type grooving rotation angle positioning device |
| CN108258953A (en) * | 2018-02-26 | 2018-07-06 | 邳州高新区新能源技术研究院有限公司 | motor torque control system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |