CN216745919U - External magnetic induction displacement measurement system for stroke device - Google Patents
External magnetic induction displacement measurement system for stroke device Download PDFInfo
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- CN216745919U CN216745919U CN202220398229.5U CN202220398229U CN216745919U CN 216745919 U CN216745919 U CN 216745919U CN 202220398229 U CN202220398229 U CN 202220398229U CN 216745919 U CN216745919 U CN 216745919U
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Abstract
The utility model discloses an external magnetic induction displacement measurement system for a stroke device, which only needs to reserve a corresponding magnetic steel mounting position when a moving part in the stroke device is designed; the sensing structure is simple, the multi-level connection combination use can be realized, and the device is almost suitable for known stroke devices with all measuring ranges; the part to be measured is not in contact with the sensor during measurement, and no physical loss exists; the measured data is accurate, and the output signal can be output in an absolute value mode or an increment mode; the installation and the dismantlement process of sensor need not to do any operation to the stroke device, only need tear the screw on the supplementary installation device of outside and can tear the change by the whole root.
Description
Technical Field
The utility model relates to the technical field of displacement measurement, in particular to an external magnetic induction displacement measurement system for a stroke device.
Background
Stroke devices, in particular hydraulic cylinders and air cylinders, are becoming more and more important in the field of modern industrial machine assembly. The stroke device is a key component of an auxiliary system and an automatic solution, and the precise position and the real-time moving speed of the internal moving part provide a solid foundation for the automatic solution when the stroke device acts.
Currently, a pull wire sensor, a magnetostrictive sensor, and the like are used for position detection of an internal moving member of a stroke device, for example. The stay wire sensor has the problems of low accuracy and limited service life due to the elasticity of the stay wire and the wire arrangement of the stay wire box, has high dependence on the external environment in the use process, and is extremely easy to damage if the environment is complicated and has sundries and the like, so the stay wire sensor is mainly used for unmovable devices or equipment with simpler environment; the magnetostrictive displacement sensor has high precision and reliability, is widely applied to industries such as military, petrifaction, mechanical manufacturing, metallurgy, energy and the like, but is mostly arranged inside a moving part rod inside a stroke device during use, the internal structure of the moving part rod needs to be damaged, and the external magnetostrictive displacement sensor is partially arranged, so that the required environmental conditions are high during installation, and the damage risk of the external sensor is extremely high under the condition that the ambient environmental conditions of field work cannot be guaranteed. The range of the magnetostrictive displacement sensor is limited to a certain extent, and once the magnetostrictive displacement sensor is produced, the magnetostrictive displacement sensor cannot be changed and cannot be used in a combined mode.
The above methods respectively have the problems of poor environmental adaptability, inconvenient replacement, incapability of changing the range and the like when the original structural strength is changed during installation.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides an external magnetic induction displacement measurement system for a stroke device, which aims to solve the problems that the existing position detection sensor for the stroke device needs to change the original structural strength during installation, has poor environmental adaptability and inconvenient replacement, cannot change the range for combined use and the like.
In order to achieve the above purpose, the utility model provides the following technical scheme: an external magnetic induction displacement measurement system for a stroke device comprises a stroke device shell, a magnetic internal moving part and a series cascade type external sensor, wherein the magnetic internal moving part is arranged inside the stroke device shell, and the series cascade type external sensor is arranged outside the stroke device shell;
the magnetic internal motion part comprises but not only two pieces of magnetic steel with different polarities, a plurality of magnetic induction chips which are uniformly distributed are arranged in the external sensor, when the stroke device is driven by external force, the magnetic internal motion part drives the magnetic steel to move and generate a changed magnetic field, and the magnetic induction chips are used for sensing the change of the magnetic field and acquiring a magnetic field strength value so as to realize displacement detection according to the change of the magnetic field strength.
Furthermore, a magnetic steel spacing adjusting block is arranged between the magnetic steels, the magnetic steels are directly adsorbed on the internal moving part or fixed on the internal moving part through a magnetic steel bracket, and the magnetic steel bracket and the magnetic steel spacing adjusting block are made of non-magnetic materials.
Furthermore, the magnetic steel is radial magnetic steel, and the polarities of the two outer arc surfaces of the radial magnetic steel are opposite.
Further, the string cascade external sensor comprises a customized range sensor, and the customized range sensor comprises a single sensor with fixed range.
Furthermore, the series cascade external sensor comprises a combined range sensor, and the combined range sensor comprises a plurality of single sensors with fixed ranges and single sensors with unfixed ranges, which are cascade-connected through a sensor shell cascade plug-in.
Furthermore, the single sensor comprises a non-magnetic-conductive sensor shell, a plurality of magnetic induction chip circuit arrangement plates and a circuit board cascade plug-in are arranged inside the non-magnetic-conductive sensor shell, and the plurality of magnetic induction chip circuit arrangement plates are cascaded in a series mode through the circuit board cascade plug-in.
Furthermore, the length of the shell of the non-magnetic sensor in the single sensor with the fixed measuring range is fixed, and the length of the shell of the non-magnetic sensor in the single sensor with the unfixed measuring range is set according to actual requirements.
Furthermore, both ends of the non-magnetic sensor shell are provided with sealing pressure pads, one end of the non-magnetic sensor shell is connected with a multi-core waterproof aviation plug, the other end of the non-magnetic sensor shell is connected with a shell seal tail, and the multi-core waterproof aviation plug is connected with an aviation plug cover.
Further, a sealing member is arranged between the single sensors in the serial cascade connection mode.
Further, the system also comprises an auxiliary mounting device, the string type cascade external sensor is fixed on the outer side of the stroke device shell through the auxiliary mounting device, and the auxiliary mounting device comprises but is not limited to an annular clamp.
The utility model has the following advantages:
the utility model provides an external magnetic induction displacement measurement system for a stroke device, which comprises a stroke device shell, an internal magnetic movement part and a series cascade type external sensor, wherein the internal magnetic movement part comprises but is not limited to two pieces of magnetic steel with different polarities, a plurality of magnetic induction chips are uniformly distributed in the external sensor, when the stroke device is driven by external force, the internal magnetic movement part moves to drive the magnetic steel to move and generate a changing magnetic field, and the magnetic induction chips are used for inducing the change of the magnetic field and collecting the strength value of the magnetic field so as to realize displacement detection according to the change of the strength value of the magnetic field. The system only needs to reserve corresponding magnetic steel mounting positions when moving parts in the stroke device are designed; the sensing structure is simple, the multi-level connection and combination can be realized, and the device is almost suitable for known stroke devices with all measuring ranges; the part to be measured is not in contact with the sensor during measurement, and no physical loss exists; the measured data is accurate, and the output signal can be output in an absolute value mode or an increment mode; the installation and the dismantlement process of sensor need not to do any operation to the stroke device, only need tear the screw on the supplementary installation device of outside and can tear the change by the whole root.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic structural diagram of an external magnetic induction displacement measurement system for a stroke device according to embodiment 1 of the present invention;
fig. 2 is an overall installation schematic diagram (using a customized range sensor) of an external magnetic induction displacement measurement system for a stroke device according to embodiment 1 of the present invention in practical use;
fig. 3 is a sectional view along an axis of an external magnetic induction displacement measurement system for a stroke device according to an embodiment 1 of the present invention, in which the installation diagram is in practical use (a combined range sensor is used);
fig. 4 is a partially enlarged view of a sectional view along an axis of an installation schematic diagram of an external magnetic induction displacement measurement system for a stroke device in practical use according to embodiment 1 of the present invention;
fig. 5 is a schematic view illustrating an installation of an external magnetically-induced displacement measuring system with magnetic internal moving element for a stroke device according to embodiment 1 of the present invention;
fig. 6 is a schematic view of a magnetic steel bracket for an internal moving member with magnetism in an external magnetic induction displacement measurement system of a stroke device according to embodiment 1 of the present invention;
fig. 7 is an external schematic view of a customized range type sensor for use in an external magnetic induction displacement measurement system of a stroke device according to embodiment 1 of the present invention;
fig. 8 is a cross-sectional view of a customized range type sensor for use in an external magnetic induction displacement measurement system of a stroking device according to embodiment 1 of the present invention;
fig. 9 is an external schematic view of a combined range type sensor for use in an external magnetic induction displacement measurement system of a stroke device according to embodiment 1 of the present invention;
fig. 10 is a sectional view of a combined range type sensor for use in an external magnetic induction displacement measurement system of a stroke device according to embodiment 1 of the present invention;
fig. 11 is a sectional view and a partially enlarged view of a connection of a combined range type sensor in an external magnetic induction displacement measurement system for a stroke device according to embodiment 1 of the present invention;
fig. 12 is a sectional view and a partial enlarged view of a head sensor of an external magnetic induction displacement measurement system for a stroke device according to an embodiment 1 of the present invention;
fig. 13 is a cross-sectional view of an intermediate sensor of the combined range type sensor for use in an external magnetic induction displacement measurement system of a stroking device according to embodiment 1 of the present invention;
fig. 14 is a cross-sectional view of a tail sensor of an external magnetic induction displacement measurement system for a stroke device, where the tail sensor is a combined range sensor according to embodiment 1 of the present invention.
In the figure: the device comprises a stroke device shell 1, a customized range type sensor 2, an annular hoop 3, a magnetic internal motion part 4, a head sensor 5, a middle sensor 6, a tail sensor 7, a multi-core waterproof aviation plug 8, an aviation plug cover 9, a sealing pressure pad 10, a first magnetic induction chip circuit arrangement board 11, a magnetic induction chip 12, a non-magnetic sensor shell (fixed size) 13, a circuit board cascade plug-in 14, a shell seal tail 15, a second magnetic induction chip circuit arrangement board 16, an internal motion part guide ring 17, magnetic steel 18 with an N-pole arc surface polarity, a magnetic steel spacing adjusting block 19, magnetic steel 20 with an S-pole arc surface polarity, a magnetic steel support 21, an internal motion part rod body 22, a sealing part 23 and a non-magnetic sensor shell (customized length) 24.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, 2, 3, and 4, the present embodiment provides an external magnetic induction displacement measurement system for a stroke device, which includes a stroke device housing 1, a magnetic internal moving element 4, and a serial cascade external sensor, where the magnetic internal moving element 4 is disposed inside the stroke device housing 1, and the serial cascade external sensor is mounted outside the stroke device housing 1.
As shown in fig. 5 and 6, the internal moving part 4 with magnetic includes, but is not limited to, two pieces of magnetic steel with different polarities, and the magnetic steel may be directly attached to the internal moving part 4, or may be fixed to the internal moving part 4 by a magnetic steel bracket 21. Be provided with evenly distributed's a plurality of magnetic induction chips 12 in the external sensor, when the stroke device was by external force drive, the magnetic steel was moved and the magnetic field that produces the change was driven when taking magnetic inside motion 4 to move, and magnetic induction chips 12 are used for responding to the change in magnetic field and gather magnetic field intensity value to realize displacement detection according to magnetic field intensity's change.
Specifically, the measuring method of the external magnetic induction displacement measuring system comprises the following steps: the magnetic induction chip 12 can sense the magnetic field change after the magnetic steel penetrates the casing 1 of the stroke device, the change of the magnetic field intensity and the distance between the magnetic steel and the chip are in a functional relation in a certain distance, the data collected by all the magnetic chips of the whole sensor are integrated, and the instant position and the instant moving speed of the internal moving part 4 with magnetism in the whole moving process can be determined through a data coupling algorithm.
In this embodiment, the casing 1 of the stroke device does not need to be designed in any change, and has no influence on the strength of the original structure.
In this embodiment, the magnetic internal moving part 4 includes a magnetic steel bracket 21 and two magnetic steels; the arc top of the magnetic steel is on the same plane with the axis of the sensor and the axis of the stroke device. The magnetic field formed by the magnetic steel 18 with the polarity of the cambered surface as the N pole and the magnetic steel 20 with the polarity of the cambered surface as the S pole penetrates through the stroke device shell 1, and the magnetic induction chip 12 collects the magnetic field strength value. The distance between the two magnetic steels with different polarities can be adjusted by the magnetic steel distance adjusting block 19 so as to be matched with the sensor induction chip to realize different resolutions and precisions. The guide ring 17 is a teflon seal ring, which can play a role in sealing and also can play a role in lubricating when the cylinder barrel runs. The magnetic steel bracket 21 is arranged on the rod body 22 of the magnetic internal motion part 4; after the magnetic steel is installed, the outer arc surface cannot contact the inner wall of the stroke device shell 1, and the distance between the outer arc surface and the inner wall of the stroke device shell is not less than 1mm in order to ensure the safety of the installation and operation processes; the magnetic steel bracket 21 comprises an adjusting block 19 which can adjust the distance between the magnetic steels, and the material of the adjusting block is non-magnetic material such as high-strength plastic.
In the embodiment, the magnetic steel is radial magnetic steel, the polarities of the two radial magnetic steel outer arc surfaces are opposite, namely 1N pole and 1S pole; when the device is installed, the left-right position relation of the N pole and the S pole is fixed and can not be reversely installed; the magnetic field intensity of the magnetic steel is ensured to be certain intensity of magnetic leakage after passing through the stroke device shell 1 with corresponding specification; the size of the magnetic steel can be customized according to the size of the stroke device shell 1 and the size of the guide ring 17.
Wherein, the fixing screws and other parts in the internal moving part 4 with magnetism all need to use non-magnetic materials.
There are two types of series cascade external sensors, one is a customized range type sensor, as shown in fig. 7 and 8; another is a combination span type sensor as shown in fig. 9, 10 and 11.
The customized range type sensor comprises a non-magnetic sensor shell (fixed size) 13 with a cambered surface, a multi-core waterproof aviation plug 8, an aviation plug cover 9, a sealing pressure pad 10, a first magnetic induction chip circuit arrangement board 11, a second magnetic induction chip circuit arrangement board 16, a circuit board cascade plug-in 14 and a shell seal tail 15. The sensor shell 13 can be made of sectional materials, round tubes and the like, the length of the sensor shell is cut according to the measuring range, and only the circuit board realizes series cascade connection; the waterproof grade of the multi-core waterproof aviation plug 8 is higher than IP 67; an included angle is formed between the aviation plug mounting surface of the aviation plug cover 9 and the surface axis of the stroke device shell 1, and the included angle is large and small so as to ensure that a certain operation space is reserved during aviation plug mounting; the housing of the non-magnetic sensor with the cambered surface is made of non-magnetic materials such as aluminum alloy and the like, and the diameter of the cambered surface is slightly larger than that of the adaptive stroke device housing 1; the sealing pad 10 should be made of rubber with elasticity, and should have oil-resistant and high-temperature-resistant properties.
The circuit board cascade plug-in 14 refers to a plug-in which two circuit boards can be connected, so that not only can the structure be fixed, but also the circuit signal transmission can be realized, and the signal is ensured not to be distorted, the loss is small, and the interference is small; the shell seal tail 15 refers to a non-magnetic conduction structural member which has certain structural strength and can realize IP67 sealing by matching with a sealing element, and the material of the structural member is the same as or similar to that of the shell of the sensor.
In the present embodiment, the combined span type sensor includes a head sensor 5, a middle sensor 6, and a tail sensor 7. The sensor shell and the circuit board are combined in various lengths to realize series cascade.
The head sensor 5, as shown in fig. 12, has a fixed measuring range, and can be used alone after being added with a shell seal tail 15, or can be used in combination with the middle sensor 6 and the tail sensor 7 to realize multi-range application;
the intermediate sensor 6, as shown in fig. 13, is fixed in length, and is mainly used for multi-section combination to increase the measuring range;
the length of the tail sensor 7, as shown in fig. 14, is not fixed, and the length is the length remaining after the head sensor 5 and the middle sensor 6 are subtracted according to the customer's needs.
The head sensor 5 has a structure including: the sensor comprises a sensor shell aviation plug cover 9, a multi-core waterproof aviation plug 8, a first magnetic induction chip circuit arrangement board 11, a second magnetic induction chip circuit arrangement board 16, a sensor shell cascade plug-in, a sealing piece 23 and a non-magnetic sensor shell (fixed size) 13 with an arc surface; the length of the non-magnetic sensor shell with the cambered surface is fixed; the strength of the sensor shell cascade plug-in unit is not lower than that of the sensor shell, and the sensor shell cascade plug-in unit has a sealing and waterproof function when being installed in a matched mode.
The structure of the intermediate sensor 6 includes: a non-magnetic sensor shell (fixed size) 13 with an arc surface, a sensor shell cascade plug-in, a sealing element 23, a second magnetic induction chip circuit arrangement board 16 and a circuit board cascade plug-in 14; the length of the housing of the non-magnetic sensor with the cambered surface is fixed; the second magnetic induction chip circuit arrangement board 16 is fixed in length.
The structure of the tail sensor 7 includes: a non-magnetic conductive sensor shell (customized length) 24 with a cambered surface, a sensor shell cascade plug-in, a sealing piece 23, a second magnetic induction chip circuit arrangement board 16 and a circuit board cascade plug-in 14.
The auxiliary mounting device structurally comprises an annular clamp 3 and the like; wherein the size of the annular hoop 3 is matched with that of the stroke device; the size of the inner arc surface of the annular hoop 3 is slightly larger than the size of the outer arc surface of the non-magnetic sensor shell with the arc surface, and the size of the outer arc surface is slightly larger than the size of the outer diameter of the stroke device.
Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (10)
1. An external magnetic induction displacement measurement system for a stroke device is characterized by comprising a stroke device shell, a magnetic internal moving part and a series cascade type external sensor, wherein the magnetic internal moving part is arranged inside the stroke device shell;
the magnetic internal motion part comprises but not only two pieces of magnetic steel with different polarities, a plurality of magnetic induction chips which are uniformly distributed are arranged in the external sensor, when the stroke device is driven by external force, the magnetic internal motion part with the magnetism is driven when moving, the magnetic steel moves and generates a changing magnetic field, and the magnetic induction chips are used for sensing the change of the magnetic field and collecting a magnetic field strength value so as to realize displacement detection according to the change of the magnetic field strength.
2. The external magnetic induction displacement measurement system for the stroke device as claimed in claim 1, wherein a magnetic steel spacing adjusting block is disposed between the magnetic steels, the magnetic steels are directly adsorbed on the internal moving member or fixed on the internal moving member through a magnetic steel bracket, and the magnetic steel bracket and the magnetic steel spacing adjusting block are made of non-magnetic materials.
3. The external magnetic induction displacement measurement system for the stroke device of claim 1, wherein the magnetic steel is a radial magnetic steel, and the polarities of the two radial magnetic steel extrados surfaces are opposite.
4. The external magnetic induction displacement measurement system for a stroking device of claim 1, wherein the series cascade external sensor comprises a custom range sensor comprising a fixed range single sensor.
5. The external magnetic induction displacement measurement system for a stroke device of claim 1, wherein the series cascade external sensor comprises a combined range sensor, the combined range sensor comprises a plurality of single sensors with fixed ranges and single sensors with unfixed ranges which are cascade connected through a sensor housing cascade plug-in.
6. The external magnetic induction displacement measurement system for the stroke device according to claim 4 or 5, wherein the single sensor comprises a non-magnetic conductive sensor casing, a plurality of magnetic induction chip circuit arrangement boards and a circuit board cascade plug-in are arranged inside the non-magnetic conductive sensor casing, and the plurality of magnetic induction chip circuit arrangement boards are cascaded in series through the circuit board cascade plug-in.
7. The external magnetic induction displacement measurement system for the stroke device as claimed in claim 6, wherein the length of the housing of the non-magnetic sensor in the single sensor with fixed range is fixed, and the length of the housing of the non-magnetic sensor in the single sensor with unfixed range is set according to actual requirements.
8. The external magnetic induction displacement measurement system for the stroke device according to claim 6, wherein the two ends of the non-magnetic sensor casing are provided with sealing pressure pads, one end of the non-magnetic sensor casing is connected with a multi-core waterproof aviation plug, the other end of the non-magnetic sensor casing is connected with a casing seal tail, and the multi-core waterproof aviation plug is connected with an aviation plug cover.
9. The external magnetic induction displacement measurement system for the stroke device as claimed in claim 6, wherein a plurality of the single sensors arranged in tandem are provided with a sealing member therebetween.
10. The external magnetic induction displacement measurement system for a stroking device of claim 1, further comprising an auxiliary mounting device by which the external sensor of the tandem cascade type is secured outside of the stroking device housing, the auxiliary mounting device including but not limited to an annular collar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220398229.5U CN216745919U (en) | 2022-02-25 | 2022-02-25 | External magnetic induction displacement measurement system for stroke device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220398229.5U CN216745919U (en) | 2022-02-25 | 2022-02-25 | External magnetic induction displacement measurement system for stroke device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812367A (en) * | 2022-04-26 | 2022-07-29 | 北京特倍福电子技术有限公司 | Non-contact external magnetic induction linear displacement measurement method |
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- 2022-02-25 CN CN202220398229.5U patent/CN216745919U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812367A (en) * | 2022-04-26 | 2022-07-29 | 北京特倍福电子技术有限公司 | Non-contact external magnetic induction linear displacement measurement method |
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