CN103063123A - Hydraulic cylinder length extension measuring device and method - Google Patents
Hydraulic cylinder length extension measuring device and method Download PDFInfo
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- CN103063123A CN103063123A CN2013100104665A CN201310010466A CN103063123A CN 103063123 A CN103063123 A CN 103063123A CN 2013100104665 A CN2013100104665 A CN 2013100104665A CN 201310010466 A CN201310010466 A CN 201310010466A CN 103063123 A CN103063123 A CN 103063123A
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Abstract
The invention relates to a hydraulic cylinder length extension measuring device and a method. The hydraulic cylinder length extension measuring device comprises an A magnetic head, a B magnetic head, a support seat and a signal processor. The support seat is installed on the end portion of one side, close to a piston rod, of a cylinder body, and the two magnetic heads are arranged on the support seat along the axial direction parallel to the piston rod, and the two magnetic heads face towards the piston rod. The magnetic heads are connected with the signal processor, magnetic field variation of magnetic lattice when the piston rod extends can be measured through the magnetic heads, lead-leg relationship and frequency of alternating changing of magnetic field signals are analyzed so as the obtain the extension direction and length extension of the hydraulic cylinder. Distance of the magnetic lattice can be set according to needs so that sufficient measuring analysis rate is guaranteed, and structure of the hydraulic cylinder can not be destroyed without influencing the performance of the hydraulic cylinder. The hydraulic cylinder length extension measuring device has the advantages of being simple in structure, convenient to install, good in measuring effect and wide in practicality.
Description
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Technical field
The present invention relates to a kind of hydraulic cylinder elongation measurement mechanism and method, the elongation that is particularly useful for plunger-type cylinder is measured.
Background technology
Hydraulic cylinder is a kind ofly to change hydraulic energy into the hydraulic actuator of rectilinear motion mechanical work, widespread use in industry.The hydraulic cylinder elongation not only reflects the stroke of mechanism, also can be used for leakage, the control instability of hydraulic cylinder, plays an important role in device intelligence control.Therefore, having measured widely of hydraulic cylinder elongation paid close attention to.Publication number is the device of length of the measurement arm support oil cylinder of CN 201110260344.2, utilizes rotary encoder or obliquity sensor, measures the length of arm support oil cylinder by the jib geometric relationship.Publication number is the Position of Hydraulic Cylinder measuring system of CN 200710005662.8, and utilization has the Metallic rod core of high magnetic susceptibility and along roughly axial groove structure, determines the relative and absolute position of piston rod.Publication number is the hydraulic cylinder with laser-measured piston rod stroke of CN 201010604297.4, has proposed the method for laser-measured piston rod stroke.Grant number is the position detecting device of the hydraulic cylinder of CN 99117610.3, by the ultrasonic measurement Position of Hydraulic Cylinder.There is following problem in these methods: the one, and complex structure is installed inconvenience; The 2nd, it is higher to measure cost, and it is lower to measure efficient.
Summary of the invention
Technical matters: the objective of the invention is to overcome the deficiency in the prior art, propose a kind of simple in structure, easy for installation, high hydraulic cylinder elongation measurement mechanism and method of measurement efficient.
Technical scheme: hydraulic cylinder elongation measurement mechanism of the present invention, comprise cylinder body, signal processor, piston rod, be provided with bearing at described cylinder body, be interval with two magnetic heads in the face of piston rod on the bearing: A magnetic head and B magnetic head, the A magnetic head links to each other with signal processor through wire with the B magnetic head, there are a plurality of magnetocrystalline lattice on surface at described piston rod along the equidistant magnetization of axis direction, and the width of magnetocrystalline lattice equates with the spacing distance of magnetocrystalline lattice; The A magnetic head that the interval arranges, the distance B ≠ nd between the B magnetic head, wherein d is the width of magnetocrystalline lattice, n is the magnetocrystalline lattice number that two magnetic heads stride across.
The magnetized spacing d in described interval is 0.1-50mm.
Utilize the hydraulic cylinder elongation measuring method of said apparatus, comprise the steps:
A, magnetize along the axis direction interval on the surface of piston rod and a plurality of magnetocrystalline lattice that width is d;
B, make piston rod be in complete retracted mode, the measured value of demarcating hydraulic cylinder elongation this moment is zero;
C, when piston rod stretches out, the changes of magnetic field information of measuring the magnetocrystalline refusing yin anode N/S of magnetocrystalline lattice on the 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 leading, the phase lag signal of B magnetic head;
When piston rod is retracted, the changes of magnetic field information of measuring the magnetocrystalline refusing yin anode N/S of magnetocrystalline lattice on the 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 leading, the phase lag signal of A magnetic head;
Add up respectively the times N that piston rod stretches out and retraction magnetic field alternately changes
1, N
2, by following formula:
L=(N
1-N
2)×d
Draw the real-time elongation L of hydraulic cylinder, finish the measurement to the hydraulic cylinder elongation; In the formula: N
1Be the changes of magnetic field number of times that the A magnetic head detects, N
2The changes of magnetic field number of times that detects for the B magnetic head.
Beneficial effect: the present invention is applicable to the elongation of plunger-type cylinder and measures, equally spaced magnetocrystalline lattice by magnetizing at piston rod, along piston rod axis direction, over against two magnetic heads of piston rod layout, the changes of magnetic field of the magnetocrystalline lattice when flexible by magnetic head measurement piston rod, the lead lag relationship of analysis of magnetic field signal and the number of times that alternately changes draw flexible direction and the elongation of hydraulic cylinder.Compared with the prior art, do not destroy hydraulic cylinder structure, do not affect its performance, simultaneously, the spacing of magnetocrystalline lattice can be set as required, can guarantee that measurement mechanism has enough Measurement Resolution.It is simple in structure, and is easy for installation, and measurement effect is good, has widely practicality.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the 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 elongation measurement mechanism of the present invention is mainly become by bearing 2, signal processor 3, A magnetic head 6, B magnetic head 5 and magnetocrystalline lattice; At the end erection support 2 of cylinder body 1 near piston rod 4 one sides, along being parallel to piston rod 4 axis directions, arranging A magnetic head 6 and B magnetic head 5 in the face of piston rod 4 spacing distances, A magnetic head 6, B magnetic head 5 connect signal processor 3 by wire on bearing; There are a plurality of magnetocrystalline lattice on surface at described piston rod 4 along the equidistant magnetization of axis direction, and the width of magnetocrystalline lattice equates with the spacing distance of magnetocrystalline lattice; The A magnetic head 6 that the interval arranges, the distance B ≠ nd between the B magnetic head 5, wherein d is the width of magnetocrystalline lattice, n is the magnetocrystalline lattice number that two magnetic heads stride across.The magnetized spacing d in described interval is 0.1-50mm.Set as required the spacing of magnetocrystalline lattice, guarantee enough Measurement Resolution.
Hydraulic cylinder elongation measuring method of the present invention: the first magnetization along the axis direction interval on the surface of piston rod 4 a plurality of magnetocrystalline lattice that width is d; Make piston rod 4 be in complete retracted mode, the measured value of demarcating hydraulic cylinder elongation this moment is zero;
When piston rod 4 stretches out, measure respectively the changes of magnetic field information of the magnetocrystalline refusing yin anode N/S of magnetocrystalline lattice on the piston rod 4 by A magnetic head 6 and B magnetic head 5, then sending signal processor 3 to, signal processor) signal phase of the A magnetic head 6 that gathers is leading, the phase lag signal of B magnetic head 5;
When piston rod 4 is retracted, the changes of magnetic field information of measuring the magnetocrystalline refusing yin anode N/S of magnetocrystalline lattice on the 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 leading, the phase lag signal of A magnetic head 6;
Add up respectively the times N that piston rod 4 stretches out and retraction magnetic field alternately changes
1, N
2, by following formula:
L=(N
1-N
2)×d
Draw the real-time elongation L of hydraulic cylinder, finish the measurement to the hydraulic cylinder elongation; In the formula: N
1Be the changes of magnetic field number of times that A magnetic head 6 detects, N
2The changes of magnetic field number of times that detects for B magnetic head 5.
Claims (3)
1. hydraulic cylinder elongation measurement mechanism, comprise cylinder body (1), signal processor (3), piston rod (4), it is characterized in that: be provided with bearing (2) at described cylinder body (1), be interval with two magnetic heads in the face of piston rod (4) on the bearing (2): A magnetic head (6) and B magnetic head (5), A magnetic head (6) links to each other with signal processor (3) through wire with B magnetic head (5), there are a plurality of magnetocrystalline lattice on surface at described piston rod (4) along the equidistant magnetization of axis direction, and the width of magnetocrystalline lattice equates with the spacing distance of magnetocrystalline lattice; The A magnetic head (6) that the interval arranges, the distance B ≠ nd between the B magnetic head (5), wherein d is the width of magnetocrystalline lattice, n is the magnetocrystalline lattice number that two magnetic heads stride across.
2. hydraulic cylinder elongation pick-up unit according to claim 1, it is characterized in that: the magnetized spacing d in described interval is 0.1-50mm.
3. the hydraulic cylinder elongation measuring method of described device according to claim 1 is characterized in that comprising the steps:
A, magnetize along the axis direction interval on the surface of piston rod (4) and a plurality of magnetocrystalline lattice that width is d;
B, make piston rod (4) be in complete retracted mode, the measured value of demarcating hydraulic cylinder elongation this moment is zero;
C, when piston rod (4) when stretching out, the changes of magnetic field information of measuring the magnetocrystalline refusing yin anode N/S of the upper magnetocrystalline lattice 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 leading, the phase lag signal of B magnetic head (5);
When piston rod (4) is retracted, the changes of magnetic field information of measuring the magnetocrystalline refusing yin anode N/S of the upper magnetocrystalline lattice 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 leading, the phase lag signal of A magnetic head (6);
Add up respectively the times N that piston rod (4) stretches out and retraction magnetic field alternately changes
1, N
2, by following formula:
L=(N
1-N
2)×d
Draw the real-time elongation L of hydraulic cylinder, finish the measurement to the hydraulic cylinder elongation; In the formula: N
1Be the changes of magnetic field number of times that A magnetic head (6) detects, N
2The changes of magnetic field number of times that detects for B magnetic head (5).
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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|---|---|---|---|
| CN201310010466.5A CN103063123B (en) | 2013-01-11 | 2013-01-11 | A kind of hydraulic cylinder length extension measuring method |
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| CN103063123A true CN103063123A (en) | 2013-04-24 |
| CN103063123B CN103063123B (en) | 2016-01-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353292A (en) * | 2013-07-29 | 2013-10-16 | 北京理工大学 | Automatic measurement apparatus for stretching amount of integrated bolt stretcher |
| CN107381285A (en) * | 2017-08-27 | 2017-11-24 | 李芳� | 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 |
| US20210002909A1 (en) * | 2018-02-12 | 2021-01-07 | 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 |
| CN115199613A (en) * | 2022-09-16 | 2022-10-18 | 江阴市洪腾机械有限公司 | Hydraulic cylinder safety monitoring device |
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| EP0296808A1 (en) * | 1987-06-22 | 1988-12-28 | Parker Hannifin Corporation | Monitoring system for position sensing and reciprocating rod used therein |
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2013
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Patent Citations (4)
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| EP0296808A1 (en) * | 1987-06-22 | 1988-12-28 | Parker Hannifin Corporation | Monitoring system for position sensing and reciprocating rod used therein |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353292A (en) * | 2013-07-29 | 2013-10-16 | 北京理工大学 | Automatic measurement apparatus for stretching amount of integrated bolt stretcher |
| 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 |
| CN107381285A (en) * | 2017-08-27 | 2017-11-24 | 李芳� | 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 |
| 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 |
| US20210002909A1 (en) * | 2018-02-12 | 2021-01-07 | 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 |
| CN115199613A (en) * | 2022-09-16 | 2022-10-18 | 江阴市洪腾机械有限公司 | Hydraulic cylinder safety monitoring device |
| CN115199613B (en) * | 2022-09-16 | 2022-12-02 | 江阴市洪腾机械有限公司 | Hydraulic cylinder safety monitoring device |
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| CN103063123B (en) | 2016-01-20 |
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