CN103063123B - A kind of hydraulic cylinder length extension measuring method - Google Patents
A kind of hydraulic cylinder length extension measuring method Download PDFInfo
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- CN103063123B CN103063123B CN201310010466.5A CN201310010466A CN103063123B CN 103063123 B CN103063123 B CN 103063123B CN 201310010466 A CN201310010466 A CN 201310010466A CN 103063123 B CN103063123 B CN 103063123B
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- piston rod
- magnetic head
- lattices
- hydraulic cylinder
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Abstract
A kind of hydraulic cylinder length extension measurement mechanism and method, comprise A magnetic head, B magnetic head, bearing, signal processor, at the end erection support of cylinder body near piston rod side, along being parallel to piston rod axis direction, arranging two magnetic heads in the face of piston rod on bearing, magnetic head connection signal processor, measured the changes of magnetic field of magnetic lattices when piston rod stretches by magnetic head, the lead lag relationship of analysis of magnetic field signal and the number of times of alternately change, draw telescopic direction and the elongation of hydraulic cylinder.The present invention can set the spacing of magnetic lattices as required, ensures enough Measurement Resolution, does not destroy hydraulic cylinder structure, does not affect its performance, and its structure is simple, and easy for installation, measurement effect is good, has practicality widely.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder length extension measurement mechanism and method, the elongation being particularly useful for plunger-type cylinder is measured.
Background technology
Hydraulic cylinder is a kind of hydraulic actuator hydraulic energy being changed into rectilinear motion mechanical work, widespread use in the industry.Hydraulic cylinder length extension not only reflects the stroke of mechanism, also can be used for the leakage of hydraulic cylinder, control instability, plays an important role in device intelligence controls.Therefore, the measurement of hydraulic cylinder length extension obtains and pays close attention to widely.Publication number is the device of the length of the measurement arm support oil cylinder of CN201110260344.2, utilizes rotary encoder or obliquity sensor, is measured the length of arm support oil cylinder by jib geometric relationship.Publication number is the Position of Hydraulic Cylinder measuring system of CN200710005662.8, utilizes the Metallic rod core with high magnetic susceptibility and along roughly axial groove structure, determine piston rod relatively and absolute position.Publication number is the hydraulic cylinder with laser-measured piston rod stroke of CN201010604297.4, proposes the method for laser-measured piston rod stroke.Grant number is the position detecting device of the hydraulic cylinder of CN99117610.3, by ultrasonic measurement Position of Hydraulic Cylinder.There is following problem in these methods: one is complex structure, installs inconvenience; Two is that measurement cost is higher, measures efficiency lower.
Summary of the invention
Technical matters: the object of the invention is the deficiency overcome in prior art, propose a kind of structure simple, easy for installation, measure the high hydraulic cylinder length extension measurement mechanism of efficiency and method.
Technical scheme: hydraulic cylinder length extension measurement mechanism of the present invention, comprise cylinder body, signal processor, piston rod, described cylinder body is provided with bearing, bearing is interval with two magnetic heads in the face of piston rod: A magnetic head and B magnetic head, A magnetic head is connected with signal processor through wire with B magnetic head, on the surface of described piston rod, equidistantly magnetization has multiple magnetic lattices in the axial direction, and the width of magnetic lattices is equal with the spacing distance of magnetic lattices; Distance D ≠ nd between spaced A magnetic head, B magnetic head, wherein d is the width of a magnetic lattices, and n is the magnetic lattices number that two magnetic heads stride across.
The magnetized spacing d in described interval is 0.1-50mm.
Utilize the hydraulic cylinder length extension measuring method of said apparatus, comprise the steps:
A, on the surface of piston rod, interval is magnetized and multiple magnetic lattices that width is d in the axial direction;
B, make piston rod be in complete retracted mode, the measured value demarcating now hydraulic cylinder length extension is zero;
C, when piston rod stretches out, the changes of magnetic field information being measured the magnetic lattices anode and cathode N/S of magnetic lattices on piston rod by A magnetic head and B magnetic head sends signal processor to, the signal phase of the A magnetic head that signal processor gathers is advanced, the phase lag signal of B magnetic head;
When piston rod is retracted, the changes of magnetic field information being measured the magnetic lattices anode and cathode N/S of magnetic lattices on piston rod by A magnetic head and B magnetic head sends signal processor to, the signal phase of the B magnetic head that signal processor gathers advanced, the phase lag signal of A magnetic head;
The times N that accumulative piston rod stretches out and retraction magnetic field alternately changes respectively
1, N
2, by following formula:
L=(N
1-N
2)×d
Draw the real-time elongation L of hydraulic cylinder, complete the measurement to hydraulic cylinder length extension; In formula: N
1for the changes of magnetic field number of times that A magnetism-head detection arrives, N
2for the changes of magnetic field number of times that B magnetism-head detection arrives.
Beneficial effect: the elongation that the present invention is applicable to plunger-type cylinder is measured, equally spaced magnetic lattices by magnetizing on the piston rod, along piston rod axis direction, just two magnetic heads are arranged to piston rod, the changes of magnetic field of magnetic lattices when piston rod stretches is measured by magnetic head, the lead lag relationship of analysis of magnetic field signal and the number of times of alternately change, draw telescopic direction and the elongation of hydraulic cylinder.Compared with the prior art, do not destroy hydraulic cylinder structure, do not affect its performance, meanwhile, the spacing of magnetic lattices can set as required, can ensure that measurement mechanism has enough Measurement Resolution.Its structure is simple, and easy for installation, measurement effect is good, has practicality widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1-cylinder body, 2-bearing, 3-signal processor, 4-piston rod, 5-B magnetic head, 6-A magnetic head.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, hydraulic cylinder length extension measurement mechanism of the present invention, is formed primarily of bearing 2, signal processor 3, A magnetic head 6, B magnetic head 5 and magnetic lattices; At the end erection support 2 of cylinder body 1 near piston rod 4 side, along being parallel to piston rod 4 axis direction, arranging that in the face of piston rod 4 spacing distance A magnetic head 6 and B magnetic head 5, A magnetic head 6, B magnetic head 5 pass through wire connection signal processor 3 on bearing; On the surface of described piston rod 4, equidistantly magnetization has multiple magnetic lattices in the axial direction, and the width of magnetic lattices is equal with the spacing distance of magnetic lattices; Distance D ≠ nd between spaced A magnetic head 6, B magnetic head 5, wherein d is the width of a magnetic lattices, and n is the magnetic lattices number that two magnetic heads stride across.The magnetized spacing d in described interval is 0.1-50mm.Set the spacing of magnetic lattices as required, ensure enough Measurement Resolution.
Hydraulic cylinder length extension measuring method of the present invention: first interval is magnetized and multiple magnetic lattices that width is d in the axial direction on the surface of piston rod 4; Make piston rod 4 be in complete retracted mode, the measured value demarcating now hydraulic cylinder length extension is zero;
When piston rod 4 stretches out, the changes of magnetic field information of the magnetic lattices anode and cathode N/S of magnetic lattices on piston rod 4 is measured respectively by A magnetic head 6 and B magnetic head 5, then signal processor 3 is sent to, signal processor) signal phase of A magnetic head 6 that gathers is advanced, the phase lag signal of B magnetic head 5;
When piston rod 4 is retracted, the changes of magnetic field information being measured the magnetic lattices anode and cathode N/S of magnetic lattices on piston rod 4 by A magnetic head 6 and B magnetic head 5 sends signal processor 3 to, the signal phase of the B magnetic head 5 that signal processor 3 gathers advanced, the phase lag signal of A magnetic head 6;
The times N that accumulative piston rod 4 stretches out and retraction magnetic field alternately changes respectively
1, N
2, by following formula:
L=(N
1-N
2)×d
Draw the real-time elongation L of hydraulic cylinder, complete the measurement to hydraulic cylinder length extension; In formula: N
1for the changes of magnetic field number of times that A magnetic head 6 detects, N
2for the changes of magnetic field number of times that B magnetic head 5 detects.
Claims (1)
1. a hydraulic cylinder length extension measuring method, adopt hydraulic cylinder length extension measurement mechanism, measurement mechanism comprises cylinder body (1), signal processor (3), piston rod (4), bearing (2) is provided with near the end of piston rod (4) side at described cylinder body (1), bearing (2) is upper along being parallel to piston rod (4) axis direction, be interval with two magnetic heads in the face of piston rod (4): A magnetic head (6) and B magnetic head (5), A magnetic head (6) is connected with signal processor (3) through wire with B magnetic head (5), on the surface of described piston rod (4), equidistantly magnetization has multiple magnetic lattices in the axial direction, the width of magnetic lattices is equal with the spacing distance of magnetic lattices, distance D ≠ nd between spaced A magnetic head (6), B magnetic head (5), wherein d is the width of a magnetic lattices, and n is the magnetic lattices number that two magnetic heads stride across, the magnetized spacing d in described interval is 0.1-50mm, it is characterized in that, measuring method comprises the steps:
A, on the surface of piston rod (4), interval is magnetized and multiple magnetic lattices that width is d in the axial direction;
B, make piston rod (4) be in complete retracted mode, the measured value demarcating now hydraulic cylinder length extension is zero;
C, when piston rod (4) stretches out, the changes of magnetic field information being measured the magnetic lattices anode and cathode N/S of the upper magnetic lattices of piston rod (4) by A magnetic head (6) and B magnetic head (5) sends signal processor (3) to, the signal phase of the A magnetic head (6) that signal processor (3) gathers is advanced, the phase lag signal of B magnetic head (5);
When piston rod (4) is retracted, the changes of magnetic field information being measured the magnetic lattices anode and cathode N/S of the upper magnetic lattices of piston rod (4) by A magnetic head (6) and B magnetic head (5) sends signal processor (3) to, the signal phase of the B magnetic head (5) that signal processor (3) gathers advanced, the phase lag signal of A magnetic head (6);
The times N that accumulative piston rod (4) stretches out and retraction magnetic field alternately changes respectively
1, N
2, by following formula:
L=(N
1-N
2)×d
Draw the real-time elongation L of hydraulic cylinder, complete the measurement to hydraulic cylinder length extension; In formula: N
1for the changes of magnetic field number of times that A magnetic head (6) detects, N
2for the changes of magnetic field that B magnetic head (5) detects, the lead lag relationship of analysis of magnetic field signal and the number of times of alternately change, draw telescopic direction and the elongation of hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310010466.5A CN103063123B (en) | 2013-01-11 | 2013-01-11 | A kind of hydraulic cylinder length extension measuring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310010466.5A CN103063123B (en) | 2013-01-11 | 2013-01-11 | A kind of hydraulic cylinder length extension measuring method |
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| CN103063123A CN103063123A (en) | 2013-04-24 |
| CN103063123B true CN103063123B (en) | 2016-01-20 |
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| CN201310010466.5A Expired - Fee Related CN103063123B (en) | 2013-01-11 | 2013-01-11 | A kind of hydraulic cylinder length extension measuring method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353292B (en) * | 2013-07-29 | 2016-02-24 | 北京理工大学 | Overall bolt stretching machine amount of tension self-operated measuring unit |
| CN107381285B (en) * | 2017-08-27 | 2018-12-07 | 绍兴上虞华谊针纺有限公司 | A kind of steel cable tension tester and method based on magnetic lattices |
| CN107572329A (en) * | 2017-08-27 | 2018-01-12 | 李芳� | A kind of mine hoist card tank and sipping fault detection method |
| DE102018202097A1 (en) * | 2018-02-12 | 2019-08-14 | Peri Gmbh | Climbing system and method for operating a climbing system |
| CN115111225A (en) * | 2022-08-30 | 2022-09-27 | 浙江大学 | Lattice filling type lightweight additive manufacturing hydraulic cylinder |
| CN115199613B (en) * | 2022-09-16 | 2022-12-02 | 江阴市洪腾机械有限公司 | Hydraulic cylinder safety monitoring device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0296808A1 (en) * | 1987-06-22 | 1988-12-28 | Parker Hannifin Corporation | Monitoring system for position sensing and reciprocating rod used therein |
| CN2103788U (en) * | 1991-03-11 | 1992-05-06 | 机械电子工业部济南铸造锻压机械研究所 | Hydraulic cylinder containing magnetic grid displacement sensor |
| CN101852226A (en) * | 2010-03-31 | 2010-10-06 | 北京金自天正智能控制股份有限公司 | Embedded magnetic grid type linear motion hydraulic cylinder capable of continuously sending displacement pulse signals |
| CN202391864U (en) * | 2011-12-20 | 2012-08-22 | 中联重科股份有限公司 | Stroke detecting device of telescopic cylinder and telescopic cylinder |
-
2013
- 2013-01-11 CN CN201310010466.5A patent/CN103063123B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0296808A1 (en) * | 1987-06-22 | 1988-12-28 | Parker Hannifin Corporation | Monitoring system for position sensing and reciprocating rod used therein |
| CN2103788U (en) * | 1991-03-11 | 1992-05-06 | 机械电子工业部济南铸造锻压机械研究所 | Hydraulic cylinder containing magnetic grid displacement sensor |
| CN101852226A (en) * | 2010-03-31 | 2010-10-06 | 北京金自天正智能控制股份有限公司 | Embedded magnetic grid type linear motion hydraulic cylinder capable of continuously sending displacement pulse signals |
| CN202391864U (en) * | 2011-12-20 | 2012-08-22 | 中联重科股份有限公司 | Stroke detecting device of telescopic cylinder and telescopic cylinder |
Non-Patent Citations (1)
| Title |
|---|
| 液压同步提升中的油缸行程测量系统设计;吴伟，徐鸣谦;《中国工程机械学报》;20040131;第2卷(第1期);85-88 * |
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