CN212658197U

CN212658197U - Multi-circle stay cord displacement sensor based on magnetic application

Info

Publication number: CN212658197U
Application number: CN202021635017.1U
Authority: CN
Inventors: 孙良玉; 温鹏; 张军
Original assignee: Yantai Yifeng Sensor Measurement And Control Technology Co ltd
Current assignee: Yantai Yifeng Sensor Measurement And Control Technology Co ltd
Priority date: 2020-08-09
Filing date: 2020-08-09
Publication date: 2021-03-05
Anticipated expiration: 2030-08-09

Abstract

The utility model belongs to the technical field of the sensor, concretely relates to many rings stay cord displacement sensor based on magnetism is used, the outside of casing sets up the stay cord head, the inside reel that sets up of casing, be connected through the stay cord between stay cord head and the reel, the wheel portion of reel rotates around the axial region, the both sides that the axial region of reel stretches out the wheel portion, one side is the long handle, one side is the short handle, the end of long handle is provided with the angle magnet steel, be provided with the angle board in one side of angle magnet steel, there is the angle chip on the angle board, the end of short handle is provided with gear structure, the last number of turns magnet steel that is provided with of gear structure, number of turns magnet steel one side is provided with the number of turns board, be provided with the number of turns chip on the number of turns board, what this application gear structure adopted is turbine formula transmission transformation ratio, it is higher to have.

Description

Multi-circle stay cord displacement sensor based on magnetic application

Technical Field

The utility model belongs to the technical field of the sensor, concretely relates to many rings of stay cord displacement sensor based on magnetism is used.

Background

The pull rope displacement sensor is also called a pull rope sensor, a pull rope electronic ruler and a pull rope encoder. The pull rope displacement sensor is a delicate structure of the linear displacement sensor, fully combines the advantages of an angle sensor and the linear displacement sensor, has the characteristics of small installation size, compact structure, large measurement stroke, high precision and the like, and the stroke varies from hundreds of millimeters to dozens of meters. The function of a pull cord displacement sensor is to convert mechanical motion into an electrical signal that can be metered, recorded or transmitted.

Stay cord displacement sensor has two kinds at present in the market: one type is made according to the principle of a potentiometer, mainly outputs current, voltage and 485 types of signals, and the sensor has the defects of low precision, poor waterproof and dustproof functions, and low service life caused by easy damage due to long-time friction. The other is in the form of an absolute value encoder, which has the disadvantages of troublesome assembly, high price, poor waterproof performance and poor cost performance.

Disclosure of Invention

To the problem among the prior art, the utility model provides a many rings of stay cord displacement sensor based on magnetism is used, in mechanical structure, what gear structure adopted is turbine formula transmission transformation ratio, has that the precision is higher, the price is with low costs, long service life, small, dustproof, waterproof characteristics.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a many rings of stay cord displacement sensor based on magnetism is used, its special character lies in:

the outside of casing sets up stay cord head 1, the inside reel 2 that sets up of casing, be connected through stay cord 13 between stay cord head 1 and the reel 2, the wheel portion of reel 2 rotates around the axial region, the both sides that the axial region of reel 2 stretches out the wheel portion, one side is the long handle, one side is the short handle, the end of long handle is provided with angle magnet steel 6, be provided with angle board 7 in one side of angle magnet steel 6, there is angle chip on angle board 7, the end of short handle is provided with gear structure, the last number of turns magnet steel 10 that is provided with of gear structure, number of turns magnet steel 10 one side is provided with number of turns board 11, be provided with the number of turns chip on number of turns.

Further, the gear structure includes worm 8, worm wheel 9, and wherein worm 8 is fixed mutually with the short handle of 2 axial parts of reel, and worm wheel 9 fixes and closely interlocks with worm 8 on worm wheel fixing base 9, has cup jointed number of turns magnet steel 10 at worm wheel 9 center.

Further, both ends of the shaft portion of the reel 2 are fixed inside the housing by a first bearing 4 and a second bearing 5, respectively.

Furthermore, a shaft sleeve is arranged at one end of the shell, and the pull rope head 1 drives the pull rope 13 to extend or retract along the shaft sleeve.

Further, the angle plate 7 and the turn plate 11 are fixed inside the housing.

Further, angle magnet steel 6 leaves the gap with angle board 7 is relative, and the angle chip is just to angle magnet steel 6, and the gap is left with number of turns board 11 to number of turns magnet steel 10, and the number of turns chip is just to number of turns magnet steel 10.

Further, be provided with power module, data processing chip, DA conversion module, 485 communication module on the angle board 7, wherein DA conversion module, 485 communication module all communicate with data processing chip, and power module is used for providing the electric energy for angle board 7.

Further, the turn plate 11 and the angle plate 7 are connected by a wire harness.

Furthermore, the winding wheel 2 is sleeved with a coil spring 3.

Compared with the prior art, the utility model discloses useful part lies in: the pull rope displacement sensor is a pull rope displacement sensor which is formed by providing 14-bit to 18-bit single-circle resolution and assisting in forming a plurality of circles of mechanical angles through a magnetic principle. Compared with the existing pull rope displacement sensor, the pull rope displacement sensor has the advantages of higher precision, low price and cost, more than one time of cost reduction than a sensor made by an absolute value multi-circle encoder principle, long service life, several times of cost reduction than a sensor made by a potentiometer principle, smaller volume than a common gear type transformation ratio due to the adoption of a gear structure, dust prevention and water prevention.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Description of the labeling: 1. stay cord end, 2, reel, 3, wind spring, 4, first bearing, 5, second bearing, 6, angle magnet steel, 7, angle board, 8, worm, 9, worm wheel, 10, number of turns magnet steel, 11, number of turns board, 12, turbine fixing base, 13, stay cord.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

The main structure of sensor of this embodiment all sets up in the casing, except that stay cord head 1, the axle sleeve is located the casing outside, all the other are located inside the casing, the axle sleeve is located casing one side, be provided with reel 2 in the casing inside, the both sides of wheel portion are stretched out to the axial region of reel 2, one side is long handle, one side is short handle, and it has wind spring 3 still to overlap on the reel 2, satisfy the wheel portion of reel 2 and rotate around the axial region, stay cord 13 one end is fixed at stay cord head 1, the other end winding is fixed on reel 2, be connected through stay cord 13 between stay cord head 1 and the reel 2, stay cord head 1 drives stay cord 13 and can stretch out or retract along the axle sleeve, first bearing 4 is passed through respectively at the axial region both ends of reel 2.

The end of long handle is provided with angle magnet steel 6, is provided with angle board 7 in one side of angle magnet steel 6, has the angle chip that is used for the detection on the angle board 7, and angle magnet steel 6 leaves the gap with angle board 7 relatively, and the angle chip is just to angle board 7.

The end of quarter butt is provided with gear structure, gear structure includes worm 8, worm wheel 9, wherein the worm 8 is fixed mutually with the quarter butt of 2 axial parts of reel, worm wheel 9 is fixed on worm wheel fixing base 9 and is closely interlock with

worm

8, 9 center at worm wheel has cup jointed number of turns magnet steel 10, number of turns magnet steel 10 one side is provided with number of turns board 11, number of turns magnet steel 10 leaves the gap with number of turns board 11 relatively, be provided with the number of turns chip on number of turns board 11, the number of turns chip is just to number of turns board 11.

The revolution plate 11 is connected with the angle plate 7 through a wire harness, and signal transmission is achieved.

Specifically, the position is obtained by pulling the cord end, rotating the reel 2 by the cord 13, and the length of the cord 13 being wound is proportional to the rotation angle of the reel 2. Angle magnet steel 6 is settled to reel 2's axial region, and angle magnet steel 6 is just to angle board 7, is provided with power module, angle chip, data processing chip, DA conversion module, 485 communication module on the angle board 7, and wherein DA conversion module, angle chip, 485 communication module all communicate with data processing chip, and power module is used for providing the electric energy for angle board 7.

The rotation angle of the reel 2 is sensed by the angle chip on the angle plate 7 just facing the angle magnetic steel 6 in the rotation process of the reel 2, the obtained single-circle rotation angle change data of the reel 2 is calculated and output through the data processing chip, after the data processing chip processes the single-circle rotation angle change data, the analog quantity signal is converted and output through the DA conversion module, and the 485 communication module receives the analog quantity signal and outputs Modubus485 data.

For example: the reel 2 has a circumference of 100mm, the angle plate 7 corresponds to 16383 data, and the data processing chip increases the length by 100mm every time the 16383 angle values are received, namely, one angle data corresponds to a display resolution of about 0.006 mm.

The absolute value is realized by connecting the winding shaft part of the winding with the input shaft of the worm 8 gear pair in the rotation process of the winding wheel 2, after the proportion is changed, the output shaft of the worm 8 gear pair is used as a circle number shaft, the circle number magnetic steel 10 is installed at the shaft end, the absolute value of the rotation angle is induced by the circle number chip on the circle number plate 11 just opposite to the circle number magnetic steel 10, and the current number value of the rotation circle is calculated by the MCU on the circle number plate 11.

After electrifying, the MCU on the ring number plate reads the single-ring angle chip value of the shaft part of the current reel, reads the chip value of the worm gear pair output shaft ring, and the absolute position is calculated by the MCU: the absolute value = number of turns of rotation × reel single-turn code value + current reel rotation angle value, the displacement result is calculated according to the reel circumference and is output as user data, the position is calculated by a turn number accumulation method in the operation process, and deviation data can be automatically corrected by comparing absolute position data in the operation process.

For example: the axial region angle chip of reel changes 20 rings, worm gear auxiliary shaft number of turns chip rotates the round, the round chip round is 16383 data, 100mm angle chip round 16384 data of reel girth, angle chip every turn round 16383 corresponds the round chip data and is about 820 data, after the displacement changes after the outage, follow new power on MCU and read current number of turns data and current angle data respectively and judge that current circle is in the position of several circles, there are how many 820 number of turns data, the angle number in the single circle how much converts the displacement into, confirm current actual displacement.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain a separate embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a many rings of stay cord displacement sensor based on magnetism is used which characterized in that: the outside of casing sets up stay cord head (1), the inside reel (2) that sets up of casing, be connected through stay cord (13) between stay cord head (1) and reel (2), the wheel portion of reel (2) rotates around the axial region, the both sides that the axial region of reel (2) stretches out the wheel portion, one side is the long handle, one side is the short handle, the end of long handle is provided with angle magnet steel (6), be provided with angle board (7) in one side of angle magnet steel (6), angle chip on angle board (7), the end of short handle is provided with gear structure, gear structure is provided with number of turns magnet steel (10), number of turns magnet steel (10) one side is provided with number of turns board (11), be provided with the number of turns chip on number of turns board (11).

2. A magnetically-based multi-turn pull cord displacement sensor of claim 1, wherein: the gear structure comprises a worm (8) and a worm wheel (9), wherein the worm (8) is fixed with a short handle of the shaft part of the reel (2), the worm wheel (9) is fixed on a worm wheel fixing seat (12) and tightly meshed with the worm (8), and the center of the worm wheel (9) is sleeved with a circle number magnetic steel (10).

3. A magnetically-based multi-turn pull cord displacement sensor of claim 2, wherein: both ends of the shaft portion of the reel (2) are fixed inside the housing by a first bearing (4) and a second bearing (5), respectively.

4. A magnetically-based multi-turn pull cord displacement sensor of claim 3, wherein: one end of the shell is provided with a shaft sleeve, and the pull rope head (1) drives the pull rope (13) to extend or retract along the shaft sleeve.

5. A magnetically-based multi-turn pull cord displacement sensor of claim 4, wherein: the angle plate (7) and the turn number plate (11) are fixed inside the shell.

6. A magnetically-based multi-turn pull cord displacement sensor of claim 5, wherein: angle magnet steel (6) and angle board (7) leave the gap relatively, and the angle chip is just to angle magnet steel (6), and number of turns magnet steel (10) and number of turns board (11) leave the gap relatively, and the number of turns chip is just to number of turns magnet steel (10).

7. A magnetically-based multi-turn pull cord displacement sensor of claim 6, wherein: be provided with power module, data processing chip, DA conversion module, 485 communication module on angle board (7), wherein DA conversion module, 485 communication module all communicate with data processing chip, and power module is used for providing the electric energy for angle board (7).

8. A magnetically-based multi-turn pull cord displacement sensor of claim 7, wherein: the turn number plate (11) is connected with the angle plate (7) through a wire harness.

9. A magnetically-based multi-turn pull cord displacement sensor of claim 8, wherein: the winding wheel (2) is also sleeved with a coil spring (3).