CN104251657A - Displacement sensor - Google Patents
Displacement sensor Download PDFInfo
- Publication number
- CN104251657A CN104251657A CN201310282287.7A CN201310282287A CN104251657A CN 104251657 A CN104251657 A CN 104251657A CN 201310282287 A CN201310282287 A CN 201310282287A CN 104251657 A CN104251657 A CN 104251657A
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- groove
- inward flange
- outward flange
- flange
- shell
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Abstract
The invention discloses a displacement sensor at least comprising a shell, a circuit board, a waveguide tube, a wire, a magnetic ring and a steel tube. The outside of the shell comprises an end cover arranged at the front end of the shell and a shell body; the inside of the shell comprises an end cover seal ring, a shell seal ring, a fastener ring, a rubber seal ring, a dumbbell shell seal ring and the like; the closed shell of the displacement sensor is made by riveting the projecting edge of the end cover and a groove of the shell and adding the seal rings; the closed shell is used for carrying and protecting a PCB (printed circuit board) inside. By the use of the displacement sensor, the problems such that the shell of the existing displacement sensor is complex to manufacture, the production process requirement is high, and the cost is low can be solved; protective performance and safety are improved; cost is lowered; mass production is achieved.
Description
Technical field
The present invention relates to detection technique field, particularly utilize a kind of displacement transducer of magnetostriction principle.
Background technology
Magnetostrictive displacement (liquid level) sensor, measures the actual displacement value of detected product by the absolute position of the contactless observation and control technology in inside accurately detected activity magnet ring; The high precision of this sensor and high reliability have been widely used in thousands of real case.
Magnetostrictive displacement sensor, is utilized magnetostriction principle, is intersected generation strain-pulse signal come measuring position exactly by two different magnetic fields.Measuring sensor is a waveguide, and the sensitive element in waveguide is made up of special magnetostriction materials.Measuring process is generation current pulse in the electronic room by sensor, this current impulse is transmitted in waveguide, thus produce a circumferential magnetic field outward at waveguide, when this magnetic field and be enclosed within the magnetic field that waveguide produces as the movable magnet ring of change in location intersect time, due to magnetostrictive effect, can produce a strain mechanical wave pulse signal in waveguide, this strain mechanical wave pulse signal transmits with fixing speed of sound, and very soon detected by electronic room.Because the transmission time of this strain mechanical wave pulse signal in waveguide and movable magnet ring are directly proportional to the distance between electronic room, by Measuring Time, just can highly precisely determine this distance.Because output signal is a real absolute value, instead of ratio or the signal that amplifies process, so there is not the situation of signal drift or variate, more without the need to regularly heavily marking.
Owing to directly contacting as determining that the movable magnet ring of position there is no with sensitive element, therefore sensor can be applicable in most evil bad industrial environment, is not subject to oil stain, solution, dust or other impact of polluting.In addition, sensor have employed hitech materials and advanced electronic processing technology, and thus it can be applied in high temperature, high pressure and the high environment vibrated.Sensor output signal is absolute displacement values, even if power interruption, reclosing, data also can not be lost, and more need not again make zero.Because sensitive element is non-contacting, even if continuous duplicate detection, also can not cause any wearing and tearing to sensor, reliability and the serviceable life of detection can be improved widely.
Can apply in exceedingly odious industrial environment to realize magneto strictive sensor, from oil stain, solution, dust or other impact of polluting, make sensitive components non-cpntact measurement, to the electronic room of sensor, namely the structure of shell proposes high requirement.
In the manufacture process of prior art, usual employing inserts the electronic equipments such as circuit board in advance, then realizes body seal by the mode of welding.But the shortcoming of this displacement transducer is that welding cost is higher in the fabrication process, welding technology is complicated, and once sealing just cannot reopen replacing or repair circuit plate, inefficiency, cost intensive, is not suitable for large-scale production.
Summary of the invention
The object of the invention is to provide a kind of displacement transducer, and manufacturing process is simple, is convenient to processing assembling and assembling, reduces production cost, enhance productivity, be applicable to large-scale production.
According to the present invention, a kind of displacement transducer, it comprises: shell, circuit board, waveguide, wire, magnet ring and steel pipe; Described circuit board is placed in shell, is provided with metering circuit and is connected with waveguide; Described waveguide is placed in steel pipe, and its axis being parallel, in the central axis of steel pipe, is connected to metering circuit with wire, forms loop; Described magnet ring is placed in outside steel pipe, can slide along steel pipe;
Described housing exterior comprises the end cap of case nose and the housing of rear end;
The end cap of described case nose, described end cap outer wall is provided with the first outward flange, the second outward flange, the 3rd outward flange, the 4th outward flange and the 5th outward flange; Form the first groove between first outward flange and the second outward flange, end cap seal circle is housed in described groove; Described end cap inwall is provided with the first inward flange, the second inward flange, the 3rd plane; Described first inward flange is vertical with the second inward flange is provided with first group of draw-in groove and second group of draw-in groove; Mesopore is provided with between described end cap front end and the 3rd plane; Described mesopore can pass for signal transmssion line, outer signal output unit.
Described housing is positioned at outer casing back, described housing exterior walls is provided with the 6th outward flange, the 7th outward flange and the 8th outward flange, forms the second groove between described 6th outward flange and the 7th outward flange, form the 3rd groove between described 7th outward flange and the 8th outward flange, between described 3rd groove, be provided with O-ring seal; Described inner walls is provided with the 4th inward flange, the 5th inward flange, the 6th inward flange, the 7th inward flange, and the 8th inward flange; Described 4th inward flange and the 5th inward flange form the 4th groove, and described 4th groove is in order to install snap ring; Described 6th inward flange is equipped with body seal circle; Described 8th inward flange is equipped with rubber seal; Described housing rear end is provided with mesopore; Described housing and fastener for connection are also connected by mesopore;
Between end cap and housing, snap ring is set;
Described steel pipe is through magnet ring, and magnet ring can slidably reciprocate on steel pipe.
Further, the distance between first group of draw-in groove (e1, e2) of the shell end cap of institute's displacement sensors is equal with the width of a P C B plate, and the distance (d1, d2) between second group of draw-in groove is equal with the width of the 2nd P C B plate.
Further, described shell end cap first outward flange diameter equals described housing the 6th inward flange diameter.
Further, described housing seal loop diameter equals the 6th inward flange diameter.
Further, the O-ring seal be provided with in described 3rd groove is dumbbell shape O-ring seal.
Further, described snap ring is open-type.
Further, described 5th inward flange is 0-45 ° of chamfering.
Further, described waveguide filament and wire sleeve are located in waveguide.
Further, described steel pipe front end is connected with housing, described steel pipe endcapped.
Further, described waveguide end is provided with damper.
The present invention is owing to have employed above-mentioned technical scheme, make it compared with prior art, there is following advantage and good effect: the present invention design after not only can improve Product processing with assembling assemble convenient, and add the security of product, this equipment cost is very low simultaneously, be well suited for large-scale production, the most important thing is that it can also be convenient to place in limited hydraulic cylinder.
Accompanying drawing explanation
Fig. 1 is according to the three-dimensional exploded view of a kind of displacement transducer of the embodiment of the present invention
Fig. 2 is according to the cut-open view of a kind of displacement transducer of the embodiment of the present invention
Fig. 3 is according to the cut-open view of the end cap of the embodiment of the present invention
Fig. 4 is according to the left view of the end cap of the embodiment of the present invention
Fig. 5 is according to the cut-open view of the housing of the embodiment of the present invention
Embodiment
In order to make object of the present invention, technical scheme and advantage are clearly understood, below in conjunction with drawings and Examples, are further elaborated to the present invention.Should be appreciated that specific embodiment described herein only in order to understand the present invention, be not intended to limit the present invention.
Embodiment is provided in conjunction with content of the present invention:
As shown in Figure 1, a kind of displacement transducer, it comprises: shell, circuit board (3e, 3d), waveguide (13), waveguide filament (12), wire (11), magnet ring (9) and steel pipe (10); Described circuit board (3e, 3d) is placed in shell, is provided with metering circuit and is connected with waveguide filament (12); Described waveguide filament (12) and copper wire (11) are connected to form loop and are placed in waveguide (13), described waveguide (13) is placed in steel pipe (10), and described waveguide (10) axis being parallel is in the central axis of steel pipe (10); Described magnet ring (9) is placed in steel pipe (10) outside, can slide along steel pipe;
Described housing exterior comprises the end cap (1) of case nose and the housing (7) of rear end;
As shown in Figure 3, be positioned at the end cap (1) of case nose, described end cap (1) outer wall is provided with the first outward flange (a1), second outward flange (a2), 3rd outward flange (a3), the 4th outward flange (a4) and the 5th outward flange (a5); Form the first groove (c1) between first outward flange (a2) and the second outward flange (a2), end cap seal circle (2) is housed in described groove (c1); Described end cap inwall is provided with the first inward flange (b1), the second inward flange (b2), the 3rd plane (b3); Described first inward flange (b1) is vertical with the second inward flange (b2) is provided with first group of draw-in groove (e1, e2) and second group of draw-in groove (d1, d2); Mesopore (14) is provided with between described end cap (1) front end and the 3rd plane (b3).
Described mesopore (14) can pass for signal transmssion line, outer signal output unit.
Snap ring (5) is set between end cap (1) and housing (7);
As shown in Figure 5, housing (7) outer wall is provided with the 6th outward flange (a6), 7th outward flange (a7) and the 8th outward flange (a8), the second groove (c2) is formed between described 6th outward flange (a6) and the 7th outward flange (a7), form the 3rd groove (c3) between described 7th outward flange (a7) and the 8th outward flange (a8), between described 3rd groove, be provided with O-ring seal (8); Described housing (7) inwall is provided with the 4th inward flange (b4), the 5th inward flange (b5), the 6th inward flange (b6), the 7th inward flange (b7) and the 8th inward flange (b8); Described 4th inward flange (a4) and the 5th inward flange (a5) form the 4th groove (c4), and described 4th groove (c4) is in order to install snap ring (5); Described 6th inward flange (b6) is equipped with body seal circle (4); Described 8th inward flange (b8) is equipped with rubber seal figure (6); Described housing (7) rear end is provided with mesopore (15), can pass for waveguide; Described housing (7) is connected with steel pipe (10) and connects.
Described steel pipe (10) is through magnet ring (9), and magnet ring (9) can slidably reciprocate on steel pipe (10).
Further, the distance between described first group of draw-in groove (e1, e2) is equal with the width of P C B plate (3e),
Distance (d1, d2) between second group of draw-in groove is equal with the width of P C B plate (3d).
Further, described end cap first outward flange (a1) diameter equals described housing (7) the 6th inward flange (b6) diameter.
Further, described body seal circle (4) diameter equals the 6th inward flange (b6) diameter.
Further, the O-ring seal (8) be provided with in described 3rd groove (c3) is dumbbell shape O-ring seal.
Further, described snap ring (5) is open-type.
Further, described 5th inward flange (b5) is 0-45 ° of chamfering.
Further, described waveguide filament (12) and wire (11) are sheathed in waveguide (13).
Further, described steel pipe (10) front end and housing (7) are tightly connected, described steel pipe end seal.Further, described waveguide end is provided with damper (16).
In the embodiment of the present invention, described metering circuit is prior art.
The installation process of shell of the present invention is as follows:
First end cap seal circle is inserted the first groove, by output line on pcb board through end cap front end mesopore, waveguide filament is housed in waveguide and is connected with the metering circuit on pcb board with wire, pcb board inserts end cap draw-in groove, sealant pouring and sealing front end mesopore; Secondly rubber seal is inserted housing, housing seal circle inserts housing along chamfering; Then end cap is inserted housing, snap ring is inserted housing; Finally dumbbell shape O-ring seal is inserted groove C3, magnet ring is sheathed on outside steel pipe.Described output line can be high-protection type electric wire, by the output line etc. of coal peace certification, does not express in the drawings.
Embodiment of the present invention measuring process is as follows:
During ohject displacement, measured object is connected with magnet ring, moving axially along steel pipe when measured object moves, along with the movement of magnet ring, magnetic field around waveguide changes, metering circuit induces magnet positions by the changes of magnetic field around waveguide, and calculates the displacement of measured object by the displacement meter calculating magnet.
The shell of displacement transducer provided by the invention has dual O RunddichtringO to seal, end cap is fastening by snap ring back-up ring, outside is sealed further by dumbbell shape O-ring seal, degree of protection and the sealing property of sensor entirety can be improved, increase the safety-type of product, adapt to severe working environment, simultaneously the shell of this displacement transducer can improve that Product processing and assembling assemble convenient, reduce costs very low, be applicable to large-scale production.
Should be understood that, the foregoing is only better embodiment of the present invention, not in order to limit the scope of the invention.For those of ordinary skills, any amendment done according to the above description, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a displacement transducer, it comprises: shell, circuit board, waveguide, wire, magnet ring and steel pipe; Described circuit board is placed in shell, is provided with metering circuit and is connected with waveguide; Described waveguide is placed in steel pipe, and its axis being parallel, in the central axis of steel pipe, is connected to metering circuit with wire, forms loop; Described magnet ring is placed in outside steel pipe, can slide along steel pipe;
It is characterized in that:
Described housing exterior comprises the end cap of case nose and the housing of rear end;
The end cap of described case nose, described end cap outer wall is provided with the first outward flange, the second outward flange, the 3rd outward flange, the 4th outward flange and the 5th outward flange; Form the first groove between first outward flange and the second outward flange, end cap seal circle is housed in described groove; Described end cap inwall is provided with the first inward flange, the second inward flange, the 3rd plane; Described first inward flange is vertical with the second inward flange is provided with first group of draw-in groove and second group of draw-in groove; Mesopore is provided with between described end cap front end and the 3rd plane;
Described housing is positioned at outer casing back, described housing exterior walls is provided with the 6th outward flange, the 7th outward flange and the 8th outward flange, forms the second groove between described 6th outward flange and the 7th outward flange, form the 3rd groove between described 7th outward flange and the 8th outward flange, between described 3rd groove, be provided with O-ring seal; Described inner walls is provided with the 4th inward flange, the 5th inward flange, the 6th inward flange, the 7th inward flange and the 8th inward flange; Described 4th inward flange and the 5th inward flange form the 4th groove, and described 4th groove is in order to install snap ring; Described 6th inward flange is equipped with body seal circle; Described 8th inward flange is equipped with rubber seal; Described housing rear end is provided with mesopore; Described housing and fastener for connection are also connected by mesopore;
Snap ring is provided with between described end cap and housing.
2. a kind of displacement transducer as claimed in claim 1, it is characterized in that first group of draw-in groove (e1 of the shell end cap of institute's displacement sensors, e2) distance between is equal with the width of a P C B plate, distance (d1, d2) between second group of draw-in groove is equal with the width of the 2nd P C B plate.
3. a kind of displacement transducer as claimed in claim 1, is characterized in that described shell end cap first outward flange diameter equals described housing the 6th inward flange diameter.
4. a kind of displacement transducer as claimed in claim 1, is characterized in that described housing seal loop diameter equals the 6th inward flange diameter.
5. a kind of displacement transducer as claimed in claim 1, is characterized in that the O-ring seal be provided with in described 3rd groove is dumbbell shape O-ring seal.
6. a kind of displacement transducer as claimed in claim 1, is characterized in that described snap ring is open-type.
7. a kind of displacement transducer as claimed in claim 1, is characterized in that described 5th inward flange is 0-45 ° of chamfering.
8. a kind of displacement transducer as claimed in claim 1, is characterized in that described waveguide filament and wire sleeve are located in waveguide.
9. a kind of displacement transducer as claimed in claim 1, is characterized in that described steel pipe front end is connected with housing, described steel pipe endcapped.
10. a kind of displacement transducer as claimed in claim 1, it is characterized in that described waveguide front end is connected with pcb board metering circuit, end is provided with damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310282287.7A CN104251657A (en) | 2013-06-28 | 2013-06-28 | Displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310282287.7A CN104251657A (en) | 2013-06-28 | 2013-06-28 | Displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104251657A true CN104251657A (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310282287.7A Pending CN104251657A (en) | 2013-06-28 | 2013-06-28 | Displacement sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN104251657A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251658A (en) * | 2013-06-28 | 2014-12-31 | 上海雷尼威尔技术有限公司 | Displacement sensor |
| CN106767977A (en) * | 2016-12-29 | 2017-05-31 | 无锡盛邦电子有限公司 | A kind of reliable sensor-packaging structure of sealing property |
| CN107883861A (en) * | 2016-09-29 | 2018-04-06 | 西克埃泰克有限责任公司 | Position sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10318898A1 (en) * | 2002-04-22 | 2003-11-06 | Bcs Bio Und Chemosensoren Gmbh | Device for receiving planar structures, especially biosensors, comprises a base body having a fixed or detachable closing part with a connector arranged between the base body and the closing part |
| CN1614374A (en) * | 2003-11-07 | 2005-05-11 | 株式会社不二工机 | Pressure sensor |
| US20080134811A1 (en) * | 2006-12-07 | 2008-06-12 | Metter-Toledo Ag | Insertion electrode device |
| CN201322600Y (en) * | 2008-12-23 | 2009-10-07 | 深圳市米朗科技有限公司 | Combined magnetostriction displacement sensor |
| CN201527276U (en) * | 2009-07-18 | 2010-07-14 | 湖州爱迪电气有限公司 | Wired sensor seal conductive connecting base |
| CN201892544U (en) * | 2010-11-19 | 2011-07-06 | 李炳蔚 | Sensor-packaging structure |
| CN201955128U (en) * | 2011-03-01 | 2011-08-31 | 南京坤拓土木工程科技有限公司 | Magnetostriction liquid level meter |
| CN104251658A (en) * | 2013-06-28 | 2014-12-31 | 上海雷尼威尔技术有限公司 | Displacement sensor |
-
2013
- 2013-06-28 CN CN201310282287.7A patent/CN104251657A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10318898A1 (en) * | 2002-04-22 | 2003-11-06 | Bcs Bio Und Chemosensoren Gmbh | Device for receiving planar structures, especially biosensors, comprises a base body having a fixed or detachable closing part with a connector arranged between the base body and the closing part |
| CN1614374A (en) * | 2003-11-07 | 2005-05-11 | 株式会社不二工机 | Pressure sensor |
| US20080134811A1 (en) * | 2006-12-07 | 2008-06-12 | Metter-Toledo Ag | Insertion electrode device |
| CN201322600Y (en) * | 2008-12-23 | 2009-10-07 | 深圳市米朗科技有限公司 | Combined magnetostriction displacement sensor |
| CN201527276U (en) * | 2009-07-18 | 2010-07-14 | 湖州爱迪电气有限公司 | Wired sensor seal conductive connecting base |
| CN201892544U (en) * | 2010-11-19 | 2011-07-06 | 李炳蔚 | Sensor-packaging structure |
| CN201955128U (en) * | 2011-03-01 | 2011-08-31 | 南京坤拓土木工程科技有限公司 | Magnetostriction liquid level meter |
| CN104251658A (en) * | 2013-06-28 | 2014-12-31 | 上海雷尼威尔技术有限公司 | Displacement sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251658A (en) * | 2013-06-28 | 2014-12-31 | 上海雷尼威尔技术有限公司 | Displacement sensor |
| CN107883861A (en) * | 2016-09-29 | 2018-04-06 | 西克埃泰克有限责任公司 | Position sensor |
| US10533880B2 (en) | 2016-09-29 | 2020-01-14 | Sick Atech Gmbh | Position sensing using waveguide configured to conduct mechanical pulses triggered by magnetostriction |
| CN106767977A (en) * | 2016-12-29 | 2017-05-31 | 无锡盛邦电子有限公司 | A kind of reliable sensor-packaging structure of sealing property |
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Application publication date: 20141231 |
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