CN102183196A - Sensor capable of continuously measuring ablation - Google Patents
Sensor capable of continuously measuring ablation Download PDFInfo
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- CN102183196A CN102183196A CN 201010623806 CN201010623806A CN102183196A CN 102183196 A CN102183196 A CN 102183196A CN 201010623806 CN201010623806 CN 201010623806 CN 201010623806 A CN201010623806 A CN 201010623806A CN 102183196 A CN102183196 A CN 102183196A
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Abstract
The invention relates to a sensor capable of continuously measuring ablation, which comprises a sensitive component, a clogged block, a shell, a printed board assembly, a rear cover, a cable and a connector, wherein the sensitive component comprises a lead, a core wire, an insulating base, a capillary, a winding and filler material. In the invention, wire winding technology is adopted to wind wires on the core wire evenly and densely, and then the filling material is filled between the wound wire and the core wire to form the sensitive component, one end of the sensitive component is insert into the shell and fixed with the clogged block; then the lead wire of the sensitive component is connected to the printed board assembly, signals are led out through the cable and the connector; after the rest space in the shell is filled with glue solution, the shell and the rear cover are welded. The sensor capable of continuously measuring ablation has the characteristic of continuous measurement, and can output signals which are in direct proportion to the ablation thickness of a heat shielding layer. According to the invention, an ablative material used in manufacture does not need to be in the same batch with the heat shielding layer, thereby reducing cost and shortening production period; the measurement accuracy is improved greatly, and the integral damage to the heat shielding layer is very small.
Description
Technical field
The present invention relates to a kind of continuous coverage ablation sensor, belong to the sensor space field.
Background technology
Ablation sensor is the extraordinary measurement mechanism that is mainly used in the space technology test.Along with the progress of space technology, it is important that its purposes more shows, and independent development becomes a branch in the space technology instrument.
Ablation sensor is that the recession thickness of heat shield is developed specially when measuring aircraft and reenter.The measurement of heat shield ablation parameters is one of important parameters for the bullet overall design, is the strong foundation of bullet design and typing.
The ablation sensor that uses on the bullet is by the difference of measuring point at present, and the measurement of will ablating is divided into large tracts of land ablation measurement and two classes are measured in end cap stagnation point ablation.Existing large tracts of land ablation survey sensor is according to the characteristic difference of ablator, and be divided into two kinds of principles: a kind of is the spring-contact ablation sensor that is used for measuring carbon-to-carbon class material, and a kind of is the on-off type ablation sensor that is used to measure high silica class material.
The principle of work of large tracts of land ablation sensor depends on the kind of measured medium.The heat insulation material that uses on the bullet is divided into two big classes at present, and a class is nonconducting high silica phenolic fiberglass reinforced plastics under the normality; Another kind of is carbon phenolic aldehyde or the weaving carbon fiber phenolic fiberglass reinforced plastics that conducts electricity under the normality.Wherein high silica phenolic fiberglass reinforced plastics is divided into the mold pressing class again, tiltedly twines three kinds of class and overlapping winding classes.High silica phenolic fiberglass reinforced plastics is selected the on-off type principle of work, and carbon phenolic aldehyde or weaving carbon fiber phenolic fiberglass reinforced plastics are selected spring-contact principle of work for use.Be the synchronism that guarantees to measure, the measurement matrix of sensor must adopt with the ablator of tested heat shield same process and process.
The on-off type ablation sensor is a characteristic of utilizing high silica class material energy charing conduction in ablation process, make the tinsel and ground short circuit one by one that are embedded in different depth in the sensor ablator, thereby make the on-off circuit output step signal corresponding with recession thickness of transducer, length wiry is decided on point position in the sensor.
Spring-contact ablation sensor is a characteristic of utilizing carbon-to-carbon material conduction, makes the on-off circuit closure of the transducer of the corresponding different measuring points degree of depth, exports the constant amplitude step electric signal corresponding with recession thickness.The specific implementation of sensor function is to utilize to hole on the carbon-to-carbon material identical with measured material, the degree of depth in each hole is corresponding one by one with the measuring point depth profile, pass the tinsel of different length in each straight hole, one end with tinsel at the side opening internal fixation, the other end is wrapped on the moving contact, and with it with spring compression.When the heat insulation material reentry ablation, the fusing of the tinsel at corresponding measuring point place, spring restores to the original state, and moving contact is contacted with stationary contact, because ablator has electric conductivity, therefore can make the on-off circuit closure of transducer, exports corresponding step signal.The characteristics of above-mentioned two kinds of measuring principles have determined that the ablation measurement data is discontinuous, can only obtain the several measuring point datas in certain measurement range.
The measurement of existing two kinds of principles has following shortcoming:
(1) can only obtain several measuring point datas in certain measurement range.
(2) when installing and using, need assemble at the mounting hole of beating on the heat shield more than the Φ 12mm, destroy bigger to the globality of heat shield.
(3) the measurement matrix of sensor must adopt with the ablator of tested heat shield same process and process, and cost is higher, and the production cycle is long.
(4) volume of sensor is big, quality heavy, and needs the distribution transforming parallel operation, takies the useful load of aircraft, the inner space of waste aircraft.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, a kind of continuous coverage ablation sensor is provided, but this sensor has the characteristics of continuous coverage, in the heat shield ablation process, sensor can be exported the signal that is directly proportional with the heat shield recession thickness, not only need not during fabrication to adopt with heat shield with batch ablator, can reduce cost to a certain extent and shorten the production cycle, and improved measuring accuracy greatly, it is very little that the globality of heat shield to be measured is broken ring, saved the space of aircraft.
Above-mentioned purpose of the present invention is achieved by following technical solution:
A kind of continuous coverage ablation sensor, comprise sensing assembly, sprue, shell, printed board subassembly, bonnet, cable and connector, wherein sensing assembly comprises lead-in wire, heart yearn, insulating base, kapillary, coiling and packing material, the coiling uniform winding is on the heart yearn that applies packing material in advance, and an end of coiling is on heart yearn, an other end is filled the packing material of electrical insulating property in the kapillary on lead-in wire, heart yearn all is fixed on the insulating base with lead-in wire; One end of sensing assembly inserts in the shell, make insulating base position, fix by sprue near an end capillaceous of insulating base, and the lead-in wire of sensing assembly is connected to the printed board subassembly by the step of outer casing inner wall, heart yearn is connected with cable, and draws by connector; The printed board subassembly is connected on the bonnet, and bonnet is connected with shell, makes plug, bonnet and shell form a hermetically-sealed construction, and filling glue in the cavity between insulating base and the printed board subassembly.
In above-mentioned continuous coverage ablation sensor, packing material also has performance anti-hot and tungsten carbide/conductive when ablating,, simultaneously at 200 high pressure, the high temperature more than the 1500K, 100KW/m more than the atmospheric pressure
2Above high heating rate is synchronous with the ablation of heat shield to be measured down.
In above-mentioned continuous coverage ablation sensor, packing material is the mixed glue solution of phenolics and silicon powder, the curing of packing material is: be raised to (80 ± 5) ℃ through 1 hour from room temperature, be raised to (100 ± 5) ℃ following insulation 2 hours again through 1 hour, ℃ be raised to (130 ± 5) ℃ by (100 ± 5) again through 0.5 hour, and at (130 ± 5) ℃ following insulation natural cooling after 3 hours.
In above-mentioned continuous coverage ablation sensor, the resistance of coiling is 3000～5000 Ω/m, and coiling uniform winding resistance behind the heart yearn that applies packing material in advance is 100～200 Ω/mm.
In above-mentioned continuous coverage ablation sensor, winding the line is nickel chromium triangle base precision resistance silk.
In above-mentioned continuous coverage ablation sensor, the expansion coefficient of heart yearn is consistent with the thermal expansivity of packing material.
In above-mentioned continuous coverage ablation sensor, heart yearn is a metal material, and metal material is a fernico.
In above-mentioned continuous coverage ablation sensor, material capillaceous is a copper.
In above-mentioned continuous coverage ablation sensor, one of the outer cover suit of sensor is adjusted nut, adjusts height capillaceous in the sensing assembly by adjusting nut, guarantees that the kapillary end face of sensing assembly flushes with heat shield outside surface to be measured.
The present invention's advantage compared with prior art is:
(1) the present invention is a kind of ablation sensor of new principle, the structural design of this sensor makes when sensor is ablated with heat shield, the packing material of sensor sensing part begins carbonization, form the carburization zone of conduction, the output resistance of sensor sensing part constantly changes with the ablation length of sensitivity part, thereby measure the recession thickness of heat shield, therefore but this sensor has the characteristics of continuous coverage, in the heat shield ablation process, sensor can be exported the signal that is directly proportional with the heat shield recession thickness, with the ablation measurement data of existing two kinds of measuring principles be discontinuous, several measuring point datas that can only obtain in certain measurement range are compared, and have improved measuring accuracy greatly;
(2) sensor of the present invention only needs to beat Φ 1.6mm mounting hole at heat shield, and very little to the broken ring of the globality of heat shield, existing measuring principle need be assembled at the mounting hole of beating on the heat shield more than the Φ 12mm, destroys relatively large to the globality of heat shield;
(3) sensor of the present invention need not during fabrication to adopt with heat shield with batch ablator, can reduce cost to a certain extent and shorten the production cycle, the measurement matrix of the sensor of existing measuring principle must adopt with the ablator of tested heat shield same process to be processed, cost is higher, and the production cycle is longer;
(4) structural design of sensor of the present invention guarantees that the quality of sensor is very little, for example only 10g in the embodiment of the invention, need not the distribution transforming parallel operation, sensor body partly takes up room also very little, for example only be Φ 9 * 13mm in the embodiment of the invention, thus sensor of the present invention to have a volume little, the characteristics of light weight, reduce the occupancy of aircraft useful load greatly, saved the inner space of aircraft; , quality big with the sensor bulk of existing measuring principle weighs, and needs the distribution transforming parallel operation to compare, and saved production cost greatly, has extremely strong practicality.
Description of drawings
Fig. 1 is Fundamentals of Sensors figure of the present invention;
Fig. 2 is a sensor construction synoptic diagram of the present invention;
Fig. 3 is sensing assembly structural representation in the sensor of the present invention;
Fig. 4 is the circuit theory diagrams of sensor of the present invention;
Fig. 5 is the scheme of installation of sensor of the present invention and UUT heat shield.
Embodiment:
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Be illustrated in figure 2 as sensor construction synoptic diagram of the present invention, this sensor comprises sensing assembly 1, sprue 2, shell 3, printed board subassembly 5, bonnet 6, cable 7 and connector 8 as seen from the figure.
Be illustrated in figure 3 as sensing assembly 1 structural representation in the sensor of the present invention, sensing assembly 1 comprises kapillary 12, insulating base 11, heart yearn 10, lead-in wire 9, coiling 13 and packing material 14, apply one deck packing material 14 on the heart yearn 10 in advance, make the insulation of heart yearn 10 outside surfaces, 13 uniform winding wind the line then on heart yearn 10, and 13 the end of winding the line is welded on the heart yearn 10, an other end is wrapped on the heart yearn 10 after go between and 9 draw, kapillary 12 is enclosed within on the heart yearn 10, fill the good packing material 14 of insulating property in the kapillary 12, heart yearn 10 all is fixed on the insulating base 11 with lead-in wire 9.
Resistance before coiling 13 is twined is 3000～5000 Ω/m, and uniform winding is 100～200 Ω/mm in the heart yearn 10 back resistances that apply packing material 14 in advance, and winds the line and 13 be nickel chromium triangle base precision resistance silk.
The expansion coefficient of heart yearn 10 is consistent with the expansion coefficient of packing material 14, and heart yearn 10 is a metal material, and heart yearn 10 is a fernico in the present embodiment.
As shown in Figure 2, one end of sensing assembly 1 inserts in the shell 3, make insulating base 11 position by the step of shell 3 inwalls, one end of the kapillary 12 of close insulating base 11 is fixing by sprue 2, and the lead-in wire 9 of sensing assembly 1 is connected to printed board subassembly 5, heart yearn 10 is connected with cable 7, and draws by connector 8.Printed board subassembly 5 is bonded on the bonnet 6, and bonnet 6 is welded as a whole with shell 3, make plug 2, bonnet 6 form a hermetically-sealed construction with shell 3, and fill glue 4 in the cavity between insulating base 11 and the printed board subassembly 5, printed board subassembly 5 is made up of PCB printed board and resistive element R2.This resistive element R2 plays dividing potential drop.
Be illustrated in figure 1 as Fundamentals of Sensors figure of the present invention; it is 13 even close on the heart yearn 10 that applies packing material 14 in advance that the embodiment of the invention adopts wrapping wire technology wind the line; put kapillary 12 and protect, fill the good packing material 14 of insulating property between wrapping wire 13 and the heart yearn 10.When sensor was ablated with heat shield, packing material 14 beginning carbonizations formed the carburization zone 15 that conducts electricity, and the output resistance of sensor constantly changes with the ablation length of sensitivity part, thereby measures the recession thickness of heat shield.
Be illustrated in figure 4 as circuit theory diagrams of the present invention.When sensor was ablated with heat shield, the output resistance R1 of sensing assembly 1 constantly changed with the ablation length of sensitivity part, the R1 dividing potential drop of connecting with fixed resistance R2 on being arranged on printed circuit board 5.
Be illustrated in figure 5 as the scheme of installation of sensor of the present invention and UUT heat shield, in the actual use of sensor of the present invention, one of shell 3 suit of sensor are adjusted nut 16, adjust the height of kapillary 12 in the sensing assembly 1 by adjusting nut 16, in actual the use, beat Φ 1.6mm mounting hole at heat shield, sensing assembly 1 is packed into by mounting hole behind the heat shield of UUT, guarantee that by adjusting nut 16 kapillary 12 end faces of sensing assembly 1 flush with heat shield outside surface 18, to adjust nut 16 afterwards and be bonded on the UUT heat shield 17 and fix, the broken ring of the less globality to heat shield of mounting hole diameter is very little.
Sensor of the present invention need not when making to adopt with heat shield with batch ablator, can reduce cost to a certain extent and shorten the production cycle.And sensor mass 10g only need not the distribution transforming parallel operation in the present embodiment, and kapillary 12 is of a size of Φ 1.6 * 20mm, the main part only Φ 9 * 13mm that takes up room, and it is little to have a volume, the characteristics of light weight.
The above; only be an example of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
The content that is not described in detail in the instructions of the present invention belongs to this area professional and technical personnel's known technology.
Claims (9)
1. continuous coverage ablation sensor, it is characterized in that: comprise sensing assembly (1), sprue (2), shell (3), printed board subassembly (5), bonnet (6), cable (7) and connector (8), wherein sensing assembly (1) comprises lead-in wire (9), heart yearn (10), insulating base (11), kapillary (12), coiling (13) and packing material (14), coiling (13) uniform winding is on the heart yearn that applies packing material (14) in advance (10), and an end of coiling (13) is on heart yearn (10), an other end is on lead-in wire (9), fill the packing material (14) of electrical insulating property in the kapillary (12), heart yearn (10) all is fixed on the insulating base (11) with lead-in wire (9); One end of sensing assembly (1) inserts in the shell (3), make insulating base (11) position by the step of shell (3) inwall, one end of the kapillary (12) of close insulating base (11) is fixing by sprue (2), and the lead-in wire (9) of sensing assembly (1) is connected to printed board subassembly (5), heart yearn (10) is connected with cable (7), and draws by connector (8); Printed board subassembly (5) is connected on the bonnet (6), and bonnet (6) is connected with shell (3), make plug (2), bonnet (6) form a hermetically-sealed construction with shell (3), and fill glue (4) in the cavity between insulating base (11) and the printed board subassembly (5).
2. a kind of continuous coverage ablation sensor according to claim 1, it is characterized in that: described packing material (14) also has performance anti-hot and tungsten carbide/conductive when ablating, simultaneously at 200 high pressure, the high temperature more than the 1500K, 100KW/m more than the atmospheric pressure
2Above high heating rate is synchronous with the ablation of heat shield to be measured down.
3. a kind of continuous coverage ablation sensor according to claim 2, it is characterized in that: described packing material (14) is the mixed glue solution of phenolics and silicon powder, the curing of packing material (14) is: be raised to (80 ± 5) ℃ through 1 hour from room temperature, be raised to (100 ± 5) ℃ following insulation 2 hours again through 1 hour, ℃ be raised to (130 ± 5) ℃ by (100 ± 5) again through 0.5 hour, and at (130 ± 5) ℃ following insulation natural cooling after 3 hours.
4. a kind of continuous coverage ablation sensor according to claim 1, it is characterized in that: the resistance of described coiling (13) is 3000～5000 Ω/m, and coiling (13) uniform winding resistance behind the heart yearn (10) that applies packing material (14) in advance is 100～200 Ω/mm.
5. a kind of continuous coverage ablation sensor according to claim 1 is characterized in that: described coiling (13) is a nickel chromium triangle base precision resistance silk.
6. a kind of continuous coverage ablation sensor according to claim 1 is characterized in that: the expansion coefficient of described heart yearn (10) is consistent with the thermal expansivity of packing material (14).
7. a kind of continuous coverage ablation sensor according to claim 1 is characterized in that: described heart yearn (10) is a metal material, and described metal material is a fernico.
8. a kind of continuous coverage ablation sensor according to claim 1 is characterized in that: the material of described kapillary (12) is a copper.
9. a kind of continuous coverage ablation sensor according to claim 1, it is characterized in that: one of the shell of sensor (3) suit is adjusted nut (16), adjust the height of kapillary (12) in the sensing assembly (1) by adjusting nut (16), guarantee that kapillary (12) end face of sensing assembly (1) flushes with heat shield outside surface to be measured (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010623806 CN102183196B (en) | 2010-12-31 | 2010-12-31 | Sensor capable of continuously measuring ablation |
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| CN 201010623806 CN102183196B (en) | 2010-12-31 | 2010-12-31 | Sensor capable of continuously measuring ablation |
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| CN102183196A true CN102183196A (en) | 2011-09-14 |
| CN102183196B CN102183196B (en) | 2012-07-18 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879434A (en) * | 2012-09-04 | 2013-01-16 | 中国电子科技集团公司第四十八研究所 | Film ablation sensor and manufacturing method thereof |
| CN105066865A (en) * | 2015-07-19 | 2015-11-18 | 张昌金 | Ablative thickness sensor using membrane technology |
| CN105444661A (en) * | 2015-12-25 | 2016-03-30 | 陕西电器研究所 | Metal sputtering thin film technology-based ablation sensor |
| CN106644131A (en) * | 2016-11-14 | 2017-05-10 | 北京临近空间飞行器系统工程研究所 | Thermal protection layer interlayer temperature and carburization degree composite measuring device and method |
| CN108414577A (en) * | 2018-01-30 | 2018-08-17 | 哈尔滨工业大学 | A kind of erosion measurement sensor and production method |
| CN114485374A (en) * | 2022-03-22 | 2022-05-13 | 中国电子科技集团公司第四十九研究所 | Broken-through ablation sensor for bow-shaped printing sheet |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879434A (en) * | 2012-09-04 | 2013-01-16 | 中国电子科技集团公司第四十八研究所 | Film ablation sensor and manufacturing method thereof |
| CN102879434B (en) * | 2012-09-04 | 2014-08-20 | 中国电子科技集团公司第四十八研究所 | Film ablation sensor and manufacturing method thereof |
| CN105066865A (en) * | 2015-07-19 | 2015-11-18 | 张昌金 | Ablative thickness sensor using membrane technology |
| CN105066865B (en) * | 2015-07-19 | 2017-06-16 | 张昌金 | A kind of ablative thickness sensor of use membrane process |
| CN105444661A (en) * | 2015-12-25 | 2016-03-30 | 陕西电器研究所 | Metal sputtering thin film technology-based ablation sensor |
| CN106644131A (en) * | 2016-11-14 | 2017-05-10 | 北京临近空间飞行器系统工程研究所 | Thermal protection layer interlayer temperature and carburization degree composite measuring device and method |
| CN108414577A (en) * | 2018-01-30 | 2018-08-17 | 哈尔滨工业大学 | A kind of erosion measurement sensor and production method |
| CN108414577B (en) * | 2018-01-30 | 2019-04-16 | 哈尔滨工业大学 | A kind of erosion measurement sensor and production method |
| CN114485374A (en) * | 2022-03-22 | 2022-05-13 | 中国电子科技集团公司第四十九研究所 | Broken-through ablation sensor for bow-shaped printing sheet |
| CN114485374B (en) * | 2022-03-22 | 2023-09-05 | 中国电子科技集团公司第四十九研究所 | Cut-through ablation sensor for bow-shaped printed sheet |
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