CN1908846A - Non-contact digital position feedback device for electric performer - Google Patents
Non-contact digital position feedback device for electric performer Download PDFInfo
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- CN1908846A CN1908846A CN 200610112529 CN200610112529A CN1908846A CN 1908846 A CN1908846 A CN 1908846A CN 200610112529 CN200610112529 CN 200610112529 CN 200610112529 A CN200610112529 A CN 200610112529A CN 1908846 A CN1908846 A CN 1908846A
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Abstract
The related non-contact digital position feedback device for electric actuator comprises: a shaft sleeve, a bearing, a silk braid with ends arranged on last two parts respectively, a lead screw run in last braid, a gear fixed on the outside of braid and engaged with motor output shaft, a magnetic steel, a step Hall switch and a position Hall switch opposite to the steel inductive area, and a SCM to detect signal from Hall switches. This invention can reduce cost and fit to real-time track.
Description
Technical field
The present invention relates to a kind of position feedback device of electric actuator, especially a kind of multi-functional position feedback device that adopts noncontact Digital Detecting mode.
Back of the body amount technology
At present, the position feedback device of electric actuator is if the position memory function after will possessing power down generally adopts dual mode, a kind of is the position output of adopting potentiometer or other analogue measurement element testing actuators, and another kind is to adopt standby power supply device to detect the position output of actuator.Potentiometer or other analogue measurement elements all adopt the contact type measurement mode, and contact type measurement can bring mechanical wear, causes measuring sensor initial failure, directly influence the control accuracy and the serviceable life of electric actuator.And adopting standby power supply device circuit complexity, cost of products is higher.
Summary of the invention
The objective of the invention is: a kind of non-contact digital position feedback device that is used for electric actuator is provided, can overcomes the defective of mechanical type measurement and standby power supply device, improve serviceable life, the reduction cost of products of electric actuator and also expand its function.
The technical solution used in the present invention is: a kind of non-contact digital position feedback device that is used for electric actuator, comprise motor 1, back up pad 2, pillar 3 and base 4, and motor 1 is installed on the back up pad 2, and back up pad 2 is fixed on the base 4 by pillar 3.Also comprise axle sleeve 5, bearing 6, elastic collar 7, silk braid 8, leading screw 9, gear 10, sensor disk 11, sensor holder 12, sensor disk magnet steel 13, step Hall switch 14, auxiliary circuit plate 15 sensor holder magnet steel 16, location Hall switch 17, main circuit board 18.Axle sleeve 5 is installed on the back up pad 2, bearing 6 is fixed on the base 4 by elastic collar 7, silk braid 8 is socketed in axle sleeve 5 and the bearing 6, leading screw 9 is connected in the inside of silk braid 8, gear 10 is fixed on by a fixed pin on the cylindrical of silk braid 8 and with the output shaft of motor 1 and is meshed, sensor disk 11 is fixed on the output shaft of motor 1, sensor holder 12 is fixed on the top of leading screw 9, a plurality of sensor disk magnet steel 13 evenly are embedded on the bottom surface of sensor disk 11, step Hall switch 14 is installed in the bottom of sensor disk 11 and corresponding with the induction zone of sensor disk magnet steel 13 movement locus by auxiliary circuit plate 15, sensor holder magnet steel 16 is embedded in the end of sensor holder 12, a plurality of location Hall switch 17 homeotropic alignments are fixed on the main circuit board 18 and are corresponding with the induction zone of sensor holder magnet steel 16 movement locus, and the step Hall switch 14 on the auxiliary circuit plate 15 is electrically connected with control circuit on the main circuit board 18.
Control circuit is made of single-chip microcomputer IC1, memory IC 2, photoelectrical coupler IC3/IC4, controllable silicon D1/D2 and a plurality of Hall switch H.The input interface of single-chip microcomputer IC1 respectively be welded on auxiliary circuit plate 15 and link to each other with Hall switch H on the main circuit board 18, the data terminal of single-chip microcomputer IC1 and memory IC 2 are joined, the output interface of single-chip microcomputer IC1 is connected with the control utmost point of controllable silicon D1/D2 by photoelectrical coupler IC3/IC4, and controllable silicon D1/D2 is connected to the terminals of motor 1.
Advantage of the present invention is: because step Hall switch and location Hall switch are installed in this device, they and corresponding magnet steel formation non-contact detection element, and the mechanical friction that does not produce electric actuator, prolong, improved the accuracy of detection of position feedback device and reduced the production cost of position feedback device from the operational use time that makes position feedback device, can expand its application function and obtain higher functional reliability by single-chip microcomputer simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is control circuit figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail:
As shown in Figure 1 and Figure 2, a kind of non-contact digital position feedback device that is used for electric actuator comprises motor 1, back up pad 2, pillar 3 and base 4, and motor 1 is installed on the back up pad 2, and back up pad 2 is fixed on the base 4 by pillar 3.Also comprise axle sleeve 5, bearing 6, elastic collar 7, silk braid 8, leading screw 9, gear 10, sensor disk 11, sensor holder 12, sensor disk magnet steel 13, step Hall switch 14, auxiliary circuit plate 15 sensor holder magnet steel 16, location Hall switch 17, main circuit board 18.Axle sleeve 5 is installed on the back up pad 2, bearing 6 is fixed on the base 4 by elastic collar 7, silk braid 8 is socketed in axle sleeve 5 and the bearing 6, leading screw 9 is connected in the inside of silk braid 8, gear 10 is fixed on by a fixed pin on the cylindrical of silk braid 8 and with the output shaft of motor 1 and is meshed, when motor 1 rotated, driven gear 10 and silk braid 8 rotated, and then drove leading screw 9 generation vertical movements.Sensor disk 11 is fixed on the output shaft of motor 1, and sensor holder 12 is fixed on the top of leading screw 9.A plurality of sensor disk magnet steel 13 evenly are embedded on the bottom surface of sensor disk 11, the number of sensor disk magnet steel is four among the present invention, step Hall switch 14 is installed in the bottom of sensor disk 11 and corresponding with the induction zone of sensor disk magnet steel 13 movement locus by auxiliary circuit plate 15, when sensor disk magnet steel 13 rotated to the top of step Hall switch 14, its electromagnetic induction signal just was sent in the control circuit of main circuit board 18 by step Hall switch.Sensor holder magnet steel 16 is embedded in the end of sensor holder 12, a plurality of location Hall switch 17 homeotropic alignments are fixed on the main circuit board 18, the number of location Hall switch is 6 among the present invention, sensor holder magnet steel 16 produces electromagnetic induction signal with the vertical movement of leading screw 9 with by the spaced location Hall switch of vertical direction, and this electromagnetic induction signal outputs in the control circuit.
As shown in Figure 2, step Hall switch 14 is made of two Hall switch H that install side by side, to obtain two Hall switch signal of conducting simultaneously at a time.
As shown in Figure 3, control circuit is the single-chip microcomputer IC1 of STC89LE58RD by model, model is the memory IC 2 of 24LC16B, two photoelectrical coupler IC3/IC4 that model is TLP521-1, two bidirectional triode thyristor D1/D2 and a plurality of Hall switch H constitute, this Hall switch H is step Hall switch and location Hall switch, the input interface of single-chip microcomputer IC1 respectively be welded on auxiliary circuit plate 15 on step Hall switch link to each other with location Hall switch on being welded on main circuit board 18, the data terminal of single-chip microcomputer IC1 and memory IC 2 are joined, to preserve data after power down.The output interface of single-chip microcomputer IC1 is connected with the control utmost point of controllable silicon D1/D2 by the photoelectrical coupler IC3/IC4 with buffer action, and controllable silicon D1/D2 is connected to the terminals of motor 1, with rotating and reverse of control motor.
Principle of work of the present invention is: through the stroke positioning action, determine the number of times of step Hall switch conducting simultaneously in total travel and location Hall switch in total travel state variation and deposit respective memory unit in.Single-chip microcomputer receives the motor rotation instruction of outside input in running status, make the motor forward, reverse or stop change, leading screw rotates with motor and produces corresponding displacement, feedback assembly increases and decreases computing with the number of times that just changes conducting simultaneously and counter-rotating conducting simultaneously that step Hall switch records in this process, incessantly the leading screw current location is fed back to the storage unit of single-chip microcomputer inside to the distance of lower-limit point.So far the electric actuator feedback assembly has been finished the most basic function of this device: when electric actuator is moved, and the output valve of real-time follow-up electric actuator.
The present invention also has an overload protection function in that electric actuator is in service: because mechanical fault or external cause are when making motor rotation blockage; step Hall switch does not send pulse output; single-chip microcomputer is distinguishing running instruction being arranged and when not detecting pace pulse; can assert the electric actuator overload; and in time send motor stall instruction, realized overload protection function.
The present invention also has the stroke zero offset capability in the electric actuator operational process: because mechanical wear, the position of upper change point and lower-limit point can change, when lead screw position in service is passed through the critical point of each subregion, can compare with the stroke positional parameter deposited in the storage unit, the conducting time numerical value in this district can be made amendment when difference occurring, and by new stroke positional parameter operation.
The present invention can send current stroke positional parameter when the electric actuator power down and deposit the power down protection circuit memory IC 2 from storage unit; after electric actuator powers on again; the stroke positional parameter is recalled to storage unit from the power down protection circuit; simultaneously by outside given command object; make leading screw move to the appointed area; in case lead screw position can be determined current location through the critical point of a certain subregion in the moving process; so no matter during power down lead screw position whether because of manually producing displacement; position feedback device all can redefine current location fast, begins to carry out real time position and follows the tracks of.
In sum, position feedback device has been realized the non-contact digital position probing, has overload protection, the stroke real-time follow-up function from normal moveout correction and after powering on again simultaneously concurrently.
Claims (3)
1, a kind of non-contact digital position feedback device that is used for electric actuator, comprise motor (1), back up pad (2), pillar (3) and base (4), motor (1) is installed on the back up pad (2), and back up pad (2) is fixed on the base (4) by pillar (3); It is characterized in that: also comprise axle sleeve (5), bearing (6), elastic collar (7), silk braid (8), leading screw (9), gear (10), sensor disk (11), sensor holder (12), sensor disk magnet steel (13), step Hall switch (14), auxiliary circuit plate (15) sensor holder magnet steel (16), location Hall switch (17) and main circuit board (18); Axle sleeve (5) is installed on the back up pad (2), bearing (6) is fixed on the base (4) by elastic collar (7), silk braid (8) is socketed in axle sleeve (5) and the bearing (6), leading screw (9) is connected in the inside of silk braid (8), and gear (10) is fixed on by a fixed pin on the cylindrical of silk braid (8) and with the output shaft of motor (1) and is meshed; Sensor disk (11) is fixed on the output shaft of motor (1), sensor holder (12) is fixed on the top of leading screw (9), a plurality of sensor disk magnet steel (13) evenly are embedded on the bottom surface of sensor disk (11), step Hall switch (14) is installed in the bottom of sensor disk (11) and corresponding with the induction zone of sensor disk magnet steel (13) movement locus by auxiliary circuit plate (15), sensor holder magnet steel (16) is embedded in the end of sensor holder (12), and it is last and corresponding with the induction zone of sensor holder magnet steel (16) movement locus that a plurality of location Hall switch (17) homeotropic alignment is fixed on main circuit board (18); Step Hall switch (14) on the auxiliary circuit plate (15) is electrically connected with control circuit on the main circuit board (18).
2, according to the described non-contact digital position feedback device that is used for electric actuator of claim 1, it is characterized in that: described step Hall switch (14) is made of two Hall switch of installing side by side (H).
3, according to the described non-contact digital position feedback device that is used for electric actuator of claim 1, it is characterized in that: described control circuit is made of single-chip microcomputer (IC1), storer (IC2), photoelectrical coupler (IC3, IC4), controllable silicon (D1, D2) and a plurality of Hall switch (H); The input interface of single-chip microcomputer (IC1) respectively be welded on auxiliary circuit plate (15) and link to each other with Hall switch (H) on the main circuit board (18), the data terminal of single-chip microcomputer (IC1) and storer (IC2) join, the output interface of single-chip microcomputer (IC1) is connected by the control utmost point of photoelectrical coupler (IC3, IC4) with controllable silicon (D1, D2), and controllable silicon (D1, D2) is connected to the terminals of motor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610112529 CN1908846A (en) | 2006-08-23 | 2006-08-23 | Non-contact digital position feedback device for electric performer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610112529 CN1908846A (en) | 2006-08-23 | 2006-08-23 | Non-contact digital position feedback device for electric performer |
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| Publication Number | Publication Date |
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| CN1908846A true CN1908846A (en) | 2007-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610112529 Pending CN1908846A (en) | 2006-08-23 | 2006-08-23 | Non-contact digital position feedback device for electric performer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887274A (en) * | 2010-07-13 | 2010-11-17 | 杭州电子科技大学 | Automatic centering and limiting circuit of linear motion mechanism |
| CN102313072A (en) * | 2010-07-04 | 2012-01-11 | 王远鸣 | Non-contact type magnetic rotary Hall sensor position sampling device |
| CN107366770A (en) * | 2017-08-27 | 2017-11-21 | 何永庆 | A kind of improved YE |
-
2006
- 2006-08-23 CN CN 200610112529 patent/CN1908846A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313072A (en) * | 2010-07-04 | 2012-01-11 | 王远鸣 | Non-contact type magnetic rotary Hall sensor position sampling device |
| CN102313072B (en) * | 2010-07-04 | 2013-03-20 | 王远鸣 | Non-contact type magnetic rotary Hall sensor position sampling device |
| CN101887274A (en) * | 2010-07-13 | 2010-11-17 | 杭州电子科技大学 | Automatic centering and limiting circuit of linear motion mechanism |
| CN107366770A (en) * | 2017-08-27 | 2017-11-21 | 何永庆 | A kind of improved YE |
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