CN102681016A - Low-frequency magnetic fluctuation analyzer sensor - Google Patents

Abstract

The invention relates to a sensor for a low-frequency magnetic fluctuation analyzer. There are three pairs of threaded holes correspondingly opened on opposite surfaces of a regular hexahedron; the antenna of the wave sensor is a bobbin in the three pairs of threaded holes to form three mutually orthogonal coil sleeves respectively. assembly; the bobbin assembly is coaxially arranged with the coil sleeve; it is characterized in that each coil sleeve is provided with two limit rings, and the two limit rings are two rings with different diameters, respectively located on the wire Correspondingly, two limit rings with different diameters are respectively provided in a pair of threaded holes of the regular hexahedron on the two outer sides of the two mounting threads of the coil pipe, so that the three coil sleeves form a mutually perpendicular structure; the heat-insulating film cover consists of six pieces The casing insulation film and six pieces of square insulation film are sewn together, and are respectively wrapped on the outer surface of the coil casing and the regular hexahedron; The casing body is rolled out and sewn from cylindrical membrane blocks; each square membrane block is provided with holes corresponding to the threaded holes.

Description

A low-frequency magnetic fluctuation analyzer sensor

technical field

The invention relates to a sensor, in particular to a low-frequency magnetic fluctuation analyzer sensor.

Background technique

Due to the high sensitivity of the space-borne magnetic fluctuation analyzer, its sensor antenna needs to be far away from interference sources, especially the equipment interference of the satellite star body, so the on-board sensor is usually installed on a wire that is about 3 meters long and vertically protrudes from the surface of the main body of the satellite. At the top of the extension rod, the ratio of the length L to the diameter D of the extension rod is usually greater than 50. The sensor antenna for measuring vector waves consists of three mutually orthogonal solenoid shafts. The wave sensor antenna not only has the requirements for measurement bandwidth, signal-to-noise ratio, resolution, and measurement accuracy, but also has electrical parameters matching and coordination between the solenoids. Structural installation accuracy and other requirements, as well as the structural strength of the sensor, etc., because the vibration of the rocket take-off will be doubled and amplified on the antenna-rod system, especially at the resonance frequency of the system, there will be an acceleration of more than 40g and a doubled amplified vibration amplitude. Such accelerations and amplitudes can damage components such as sensor antenna structures and surface thermal insulation films.

Contents of the invention

The purpose of the present invention is, in order to solve above-mentioned problem, provide a kind of not only can work stably for a long time in harsh space environment such as low temperature, vacuum, antistatic, strong radiation or irradiation, also can bear the vibration acceleration when being subjected to such as satellite launching. Star low-frequency magnetic fluctuation analyzer sensor with strong vibration of 40g.

In order to achieve the above-mentioned purpose of the invention, a low-frequency magnetic fluctuation analyzer sensor is proposed, including: a hollow regular hexahedron 11, a wave sensor antenna and an insulating film cover 8;

There are three pairs of threaded holes 30 correspondingly opened on the opposite surface of the regular hexahedron 11; the wave sensor antenna is respectively penetrated in the three pairs of threaded holes 30 to form three mutually orthogonal coil sleeves 13 and the bobbins therein Assembly 3; the bobbin assembly 3 is arranged coaxially with the coil casing 13;

It is characterized in that,

Each of the coil sleeves 13 is provided with two limit rings 39, which are two circular rings with different diameters, which are respectively located on the two ends of the two mounting threads 24 on the coil sleeve 13. On the outside, correspondingly, two stop rings with different diameters are arranged in the pair of threaded holes 30 of the regular hexahedron 11, so that the three coil sleeves 13 form a mutually perpendicular and orthogonal structure;

The heat insulating film cover 8 is sewn from six casing heat insulating films and six square regular hexahedral heat insulating films, which are respectively wrapped on the outer surfaces of the coil casing 13 and the regular hexahedron 11;

The casing insulation film is sewn from a disc-shaped film block 6 coated on the casing end cap 22 and a cylindrical film block 28 rolled out of the casing body;

Each square membrane block 10 is provided with a hole corresponding to the threaded hole 30 .

The low-frequency magnetic fluctuation analyzer sensor also includes: a bracket 7 with a disc-shaped base 19;

The support 7 is arranged at a corner end of the regular hexahedron 11 along the diagonal line of the regular hexahedron 11 .

Each surface of the regular hexahedron 11 is provided with a through hole 21 with a trapezoidal section.

The bobbin assembly 3 includes: a magnetic core 2 coaxially arranged from the inside to the outside, a bobbin 1, a detection coil 35 and a coil protection layer 5, wherein the bobbin 1 includes: a middle section 38 of the bobbin and The pipe section 29, the detection coil 35 and the coil protection layer 5 are sleeved on the middle section 38 of the bobbin, the two ends of the middle section 38 of the bobbin are respectively provided with bobbin stoppers 37, and the length of the magnetic core 2 is the same as the length of the bobbin The spools 1 are equal in length.

The length of the middle section 38 of the bobbin is less than 95% of the full length of the bobbin.

The coil casing 13 includes: a middle section 31 of the coil casing and conical sections 26 located at both ends; the outer end of the conical section 26 is provided with casing end caps 22 .

The sleeve end cap 22 is used to fix the bobbin assembly 3 in the sleeve body 33 through the end thread 23 at the outer end of the conical section 26 .

The low-frequency magnetic fluctuation analyzer sensor also includes a fixed plate 17;

The fixing piece 17 is used to fix the coil casing 13 and the regular hexahedron bracket 11 together.

The length of the busbar of the limiting ring 39 is 2.0 mm to 3.5 mm; the diameter of the limiting ring 39 located between the fixing piece 17 and the mounting thread 24 is 0 mm to 1.0 mm larger than the diameter of the casing at the mounting thread 24 mm; the diameter of the other limiting ring 39 located between the mounting thread 24 and the conical section 26 is 0 mm to 1.5 mm smaller than the diameter of the casing at the mounting thread 24 .

The magnetic core 2 is a magnetic core formed by stacking multi-layer permalloy strips into a straight rod shape.

The advantages of the present invention are that the sensor of the present invention has a reasonable structure and good structural integrity, the main parts are machined as a whole, and the processing accuracy is high and the error is small; the strength of each part and the overall structure is high, and it can withstand the harsh emission vibration process; the sensor coil is always The mechanical structure of the finished piece is reasonable, and the installation accuracy and size are less affected by vibration; the thin-walled hexahedron frame structure effectively reduces the deposition of charged particles and avoids the negative impact of high-voltage discharge; the sensor coated with an insulating film cover is suitable for extremely changing space environments, passive The temperature control effect is good, the temperature inside the hood is stable, and the temperature-time change is gentle.

Description of drawings

Fig. 1 is the schematic diagram of low-frequency magnetic fluctuation analyzer sensor of the present invention;

Fig. 2 is the schematic diagram of the bobbin, magnetic core and detection coil of low-frequency magnetic fluctuation analyzer sensor of the present invention;

Fig. 3 is a schematic diagram of the coil casing of the low-frequency magnetic fluctuation analyzer sensor of the present invention.

Drawing logo:

1. Spool 2. Magnetic core 3. Spool assembly 4. Through hole

5. Coil protection layer 6. Disc-shaped membrane block 7. Bracket 8. Thermal insulation shield

9. Bracket through hole 10. Square membrane block 11. Regular hexahedron 12. Fixing frame

13. Coil casing 14. Fixing hole 15. Installation bottom surface 16. Installation surface

17. Fixing piece 18. Ground pile bolt 19. Disc base 20. Stitched edge of thermal insulation film

21. Through hole 22. Sleeve end cap 23. End thread 24. Mounting thread

25. Coil casing inner hole 26. Conical section 27. Mounting hole 28. Cylindrical membrane block

29. Pipe section 30. Threaded hole 31. Middle section of coil casing 32. Edge

33. Sleeve body 34. Membrane suture edge 35. Detection coil 36. End cap hole

37. Spool block 38. Middle section of spool 39. Limit ring 40. Bracket rod

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The present invention provides a low-frequency magnetic fluctuation analyzer sensor used by a spaceborne magnetic fluctuation analyzer, comprising: a fixed frame 12, a magnetic core 2, a bobbin 1, a detection coil 35, a coil casing 13, an insulating shield 8 and an insulating cover Grounding wire; the fixed mount 12 is made up of a hollow regular hexahedron 11 and a support 7 with a disc-shaped base 19, and three pairs of mutually orthogonal threaded holes 30 are respectively opened on three pairs of opposite planes of the regular hexahedron 11. The core 2 is stacked into a straight rod shape by multi-layer permalloy strips and loaded into the hole of the bobbin 1. The bobbin 1 is a hollow tube divided into three sections. The two ends of the bobbin middle section 38 are provided with bobbin stoppers 37. The surface is surrounded by a solenoid-type detection coil 35 wound by enameled wire. The detection coil is composed of an induction coil and a feedback coil. The two ends of the bobbin are coaxial hollow pipe sections 29. Same, the spool is the same length as the magnetic core, and the spool assembly 3 with the magnetic core and wound detection coil and coil protective layer 5 is inserted into the sleeve body 33, and the sleeve end cap 22 is connected to the sleeve body The mounting thread 24 at the end is encapsulated, wherein the sleeve body 33 has the same length as the spool; the sleeve end cap 22 has an end cap hole 36 passing through the lead wire of the spool, and the exposed part of the sleeve body 33 outside the regular hexahedron 11 is The tapered segment 26 at the end of the outer radial direction, the coil sleeve 13 is screwed in as a whole and fastened in the threaded hole 30 on the regular hexahedral housing 11, and the coil sleeve fixing piece 17 is aligned with the regular hexahedron 11 with a pin. The concentric through holes on the plane are locked; the support 7 at the bottom of the fixed frame 12 protrudes from a top corner of the regular hexahedron shell, and the support 7 is integrated with the hollow regular hexahedron 11. The bottom of the support is provided with a disc-shaped base 19, which Mounting holes are provided on the base; the heat-insulating film cover 8 is wrapped on the outside of the coil sleeve 13 and the regular hexagonal shell, and the heat-insulating film cover is made of a plurality of heat-insulating film blocks cut into different geometric shapes and sewn into one body. Each block of heat insulation film is made of multi-layer special heat insulation film and special spacer. Then use insulating tape with a width of about 25 mm to symmetrically surround and wrap the edge of the compressed heat insulation film block. Finally, use an insulating wire When sewing, between each heat-insulating film block that forms the heat-insulating film cover, an electrical insulating tape is sandwiched along the seam so that the heat-insulating film blocks are electrically insulated on the order of kilovolts. The outermost layer of the heat-insulating film block is Conductive diaphragm, for the coil casing part protruding from the positive hexagonal shell, it is composed of a disc-shaped film block 6 covered at the end of the coil casing and a cylindrical film block 28 rolled into a tube-shaped film block 28 along the overlapping thermal insulation film seam edge 20 are sewed together to form the heat insulating film part of the outer sleeve, and each surface of the regular hexagonal housing 11 is covered by a square film block 10 with a round hole that allows the coil sleeve to pass through, and the square film block 10 is then combined with The heat insulation film part of the outer casing at the corresponding position is sewn into an integrated 1/6 heat insulation cover part, and finally the six 1/6 heat insulation cover parts corresponding to the regular six-sided shell--coil casing are sewn into a whole and completely wrapped The entire sensor structure except the bracket and the ground pile bolt 18; in addition, on the inner surface of each multi-layer heat insulation film block, there is a conductive diaphragm connected with the outermost layer of the heat insulation film as an electrical connection. The grounding wire of the thermal insulation cover connected to the adjacent thermal insulation film block is connected to the grounding wire of the thermal insulation cover, and the grounding wire at the end is connected to the special ground pile bolt 18 of the wave sensor. Connect the insulation film blocks to form an open electrical circuit.

In the above technical solution, the magnetic core 2 is laminated with multi-layer permalloy strips of the same thickness and certain width to form a rod-shaped body with a rectangular cross-section, and is compressed into a straight rod shape in a molding die.

In the above technical solution, the coil sleeve 13 includes: a sleeve body 33 and a sleeve end cap 22, wherein the sleeve end cap 22 is connected through the end thread 23 of the sleeve body 33, and the coil sleeve 13 is passed through the fixing piece by a pin 17 is fixed together with the regular hexahedron 11, the sleeve body has a coaxial cylindrical coil sleeve inner hole 25, the size of the coil sleeve inner hole matches the outer diameter of the bobbin stopper 37, and the mounting thread matches the threaded hole on the regular hexahedron 11 30, the fixed piece 17 is formed into an eccentric circle and is located at the closed end of the casing body and is adjacent to the outer side of the stop ring 39.

The length of the middle section of the bobbin is not greater than 95% of the full length of the bobbin.

In the above technical solution, the fixing piece 17 is provided with a fixing hole 14 , and the locking between the coil sleeve 13 and the regular hexahedron 11 is realized through the pin and the locking through hole opened on the mounting surface 16 and corresponding to the fixing hole 14 .

In the above technical solution, the bracket 7 with the disc-shaped base 19 and the grounding stake bolt 18 both protrude from the heat insulating shield 8 .

In the above-mentioned technical scheme, the bracket 7 part of the fixed frame 12 is stretched out from a vertex end of the regular hexagonal housing 11, and is on the line with another symmetrical vertex, and the bracket bar 40 connected with the disc-shaped base 19 There are support through holes 9 in part, and the disc-shaped base at the bottom of the support is provided with mounting holes 27.

In the above technical solution, the four lead wires of the induction coil and the feedback coil are drawn out from one end of the bobbin and through the end cap hole 36 .

The two limiting rings 39 are two toroidal surfaces with different diameters, which are respectively located on both sides of the mounting thread 24. The diameter of the limiting ring adjacent to the fixing piece 17 is 0.0mm-1.0mm larger than the mounting thread, and the other is 0.0mm-1.0mm larger than the mounting thread. The thread is 0.0mm-1.5mm smaller, the limit ring 39 has a width of 2.0mm-3.5mm, and the corresponding inner hole limit ring has the same size.

The low-frequency magnetic fluctuation analyzer sensor is mainly composed of nine parts, which are: bobbin 1, magnetic core 2, detection coil 35, coil sleeve 13, fixing frame 12 for fixing the coil sleeve, heat insulation shield 8 and heat insulation cover grounding wire .

Fig. 1 is a three-dimensional view of the sensor of the low-frequency magnetic fluctuation analyzer of the present invention, as shown in Fig. 1 . The bobbin 1, the coil casing 13 and the fixing frame 12 are all made of engineering plastics, and three groups of solenoid-shaped detection coils 35 representing three wave components are closely wound on the bobbin 1 with a length-to-diameter ratio of 30:1. 35 includes the induction coil and the feedback coil, the total length of the bobbin 1 is 210 mm, and the permalloy magnetic core 2 with the same length as the bobbin 1 is all inserted into the hole of the bobbin 1, and then the wound coil is connected with the lead wire and wrapped around the coil with a thickness The coil protection layer 5 made of insulating material of about 1 mm is finally inserted into the bobbin assembly 3 and packaged in the sleeve body 33, and at the same time, the four lead wires of the induction coil and the feedback coil are connected by the terminal on the sleeve end cap 22. Cap hole 36 leads out, and end cap hole 36 diameters 3 millimeters. All three casing pipes are screwed into three pairs of mutually orthogonal threaded holes 30 on the regular hexahedron 11 by the mounting thread 24 of its middle section, and are limited by the corresponding positions and sizes in the limit rings 39 on both sides and the threaded holes 30. The position ring is used to force the alignment position. The sleeve body installed in place can reach a fit clearance of 0.01mm and a coaxiality of less than 0.1 degree by the limit ring 39 and the corresponding limit ring in the threaded hole 30, and the regular hexahedron 11 The size is 72 mm x 72 mm x 72 mm, the mounting thread 24 and the threaded hole 30 are both M25 x 1 mm, and a pin with a diameter of 5 mm passes through the fixing hole 14 on the fixing piece 17 and the corresponding hole on the regular hexahedron 11 The sleeve body 33 is locked. The mutual vertical spacing between the bushings is 39 mm. The center of symmetry of the three bushings is located at about 78 mm vertically upward from the center of the installation bottom surface 15 of the regular hexahedron 11 . The disc-shaped base 19 of the support 7 that a vertex of the regular hexahedron 11 stretches out has 3 installation holes 27, and the long 48 millimeters of support 7, 19 diameters of the disc-shaped base are 62 millimeters. The cone segment 26 has a taper of about 2 degrees.

The three-dimensional view of the bobbin 1, the magnetic core 2 and the detection coil 35 of the low-frequency magnetic fluctuation analyzer sensor of the present invention is shown in FIG. 2 . The inner diameter of bobbin 1 is 9 millimeters, the outer diameter is 12 millimeters, and the length of its winding section is 190 millimeters. The solenoid coil is wound by enameled wire with a diameter of 0.12 millimeters, the induction coil has 18500 turns, and the feedback coil has 750 turns. The casing body 33 has an inner diameter of 14.1 millimeters and a depth of 210 millimeters, and the through holes 4 at the bottom of the casing body 33 have a diameter of 3 millimeters. The three-dimensional view of the coil casing 13 of the low-frequency magnetic fluctuation analyzer sensor of the present invention is shown in FIG. 3 . The outer diameter and length of the sleeve body 33 are Φ19mm-Φ22mm and 213mm respectively. The outer diameter of the sleeve body 33 is divided into 3 sections, the middle section 31 of the coil sleeve with a length of about 70 mm has a diameter of 21 mm, and the mounting threads 24 on both sides of the middle section have a length of 10 mm. The specification is M24×0.75 mm. There are conical sections 26 with a length of about 70 mm on both sides of 33, the outer diameter of the conical section 26 is reduced from 22 mm to 19 mm at the end of the middle section, and the end thread 23 is 5 mm long, and the specification is M22 × 0.5 mm; the casing end The internal thread, external diameter, length and internal thread hole depth of the cap 22 are M22×0.75, 22 millimeters, 8 millimeters and 5 millimeters respectively. Fixed piece 17 dimensions diameter 40 millimeters, thickness 2.5 millimeters, 14 apertures 5 millimeters of fixed holes. The size of the threaded hole 30 is M24×0.75 mm, the edge width of the threaded hole 30 is not less than 7 mm, and is locked by the fixing hole 14 about 8 mm from the edge of the threaded hole 30 wall. The heat-insulating shielding outer cover 8 is stitched into an integral structure by 6 1/6 heat-insulating cover parts according to the outline and scale of the sensor, and has a protruding part composed of six asymmetric cone-shaped heat-insulating cover parts, so that the maximum scale of the heat-insulating cover as a whole reaches 225 mm.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all of them should be included in the scope of the present invention. within the scope of the claims.

Claims (10)

1. the moving analyser sensor of low frequency magnetic wave comprises: the regular hexahedron of hollow (11), wave sensor antenna and adiabatic membrane outer cover (8);

Correspondence has three double thread holes (30) on the opposite face of described regular hexahedron (11); Described wave sensor antenna forms mutually orthogonal three coil sleeve pipes (13) and the total member of bobbin (3) wherein for being arranged in respectively in the three double thread holes (30); Total member of described bobbin (3) and described coil sleeve pipe (13) coaxial arrangement;

It is characterized in that,

Described each root coil sleeve pipe (13) is provided with twice spacing ring (39); This twice spacing ring (39) is two annulus that diameter is different; Lay respectively at coil sleeve pipe (13) and go up two outsides that twice are installed screw thread (24); Accordingly, be respectively equipped with two spacing rings that diameter is different in a pair of threaded hole (30) of described regular hexahedron (11), be used to make three coil sleeve pipes (13) to form mutual perpendicular quadrature structure;

Described adiabatic membrane outer cover (8) is made by six sleeve pipe adiabatic membranes and six square regular hexahedron adiabatic membranes and is formed, respectively the outside surface of coated online snare pipe (13) and regular hexahedron (11);

Described sleeve pipe adiabatic membrane is made and is formed by being coated on the disc film piece (6) on the sleeve pipe end cap (22) and being coated on tubular film piece (28) that sleeve body is rolled into outward;

Described every square film piece (10) is provided with hole corresponding to threaded hole (30).

2. low frequency magnetic wave according to claim 1 moves the analyser sensor, it is characterized in that, the moving analyser sensor of described low frequency magnetic wave also comprises: the support (7) that has disc-shaped base (19);

Described support (7) is arranged at a drift angle end of regular hexahedron (11) along the diagonal line of regular hexahedron (11).

3. low frequency magnetic wave according to claim 1 and 2 moves the analyser sensor, it is characterized in that, all offers the through hole (21) of trapezoidal cross-section on each face of described regular hexahedron (11).

4. low frequency magnetic wave according to claim 1 and 2 moves the analyser sensor; It is characterized in that; The total member of described bobbin (3) comprising: the magnetic core of coaxial arrangement (2), bobbin (1), detecting coil (35) and coil protect layer (5) from inside to outside; Wherein, described bobbin (1) comprising: bobbin stage casing (38) and be positioned at the pipeline section (29) at two ends, and described detecting coil (35) and coil protect layer (5) are sheathed on the bobbin stage casing (38); The place, two ends in described bobbin stage casing (38) is provided with bobbin catch (37), described magnetic core (2) length and described bobbin (1) equal in length respectively.

5. low frequency magnetic wave according to claim 4 moves the analyser sensor, it is characterized in that, the length in described bobbin stage casing (38) is less than 95% of bobbin total length.

6. low frequency magnetic wave according to claim 1 and 2 moves the analyser sensor, it is characterized in that, described coil sleeve pipe (13) comprising: coil sleeve pipe stage casing (31) and be positioned at the conical section (26) at two ends; The outer end of described conical section (26) is provided with sleeve pipe end cap (22).

7. low frequency magnetic wave according to claim 6 moves the analyser sensor, it is characterized in that described sleeve pipe end cap (22) is used for the total member of end thread (23) fixed spool (3) through conical section (26) outer end in described sleeve body (33).

8. low frequency magnetic wave according to claim 1 and 2 moves the analyser sensor, it is characterized in that, the moving analyser sensor of described low frequency magnetic wave also comprises stator (17);

Described stator (17) is used for coil sleeve pipe (13) and regular hexahedron support (11) are fixed together.

9. low frequency magnetic wave according to claim 8 moves the analyser sensor, it is characterized in that, the bus length of described spacing ring (39) is 2.0mm～3.5mm; The described diameter that is positioned at the spacing ring (39) between stator (17) and the installation screw thread (24) is than the big 0mm～1.0mm of casing diameter that screw thread (24) is located is installed; The described diameter ratio that another spacing ring (39) between screw thread (24) and the conical section (26) is installed that is positioned at is installed the little 0mm～1.5mm of casing diameter that screw thread (24) is located.

10. low frequency magnetic wave according to claim 1 and 2 moves the analyser sensor, it is characterized in that, said magnetic core (2) is the magnetic core that the multilayer permalloy tape is superimposed into straight clavate.

Images