CN109813970A - A kind of extensible and pinpoint space electric field instrument of cable - Google Patents
A kind of extensible and pinpoint space electric field instrument of cable Download PDFInfo
- Publication number
- CN109813970A CN109813970A CN201811550348.2A CN201811550348A CN109813970A CN 109813970 A CN109813970 A CN 109813970A CN 201811550348 A CN201811550348 A CN 201811550348A CN 109813970 A CN109813970 A CN 109813970A
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- electric field
- field instrument
- cable
- composite cable
- reel
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Abstract
The invention discloses a kind of extensible and pinpoint space electric field instrument of cable, comprising: composite cable, reel, conducting slip ring, photoelectric counter, self-locking motor, end connector, apical connector, elastic roll, signal processing unit and spherical sensors；Composite cable is wound on a bobbin, and one end is drawn by the conducting slip ring installed inside reel is connected to end connector, and the composite cable other end penetrates elastic roll center, is connected on elastic roll top with apical connector；End connector is connect with signal processing unit, and apical connector is connect with spherical sensors, constitutes electric field instrument signal transmission path；Reel edge is equipped with photoelectric counter, controls the circle number of reel rotation, according to photoelectric counter to control composite cable length of run.The composite cable of electric field instrument of the present invention is extensible and is accurately positioned.
Description
Technical field
The present invention relates to Space environment detection technical fields, and in particular to a kind of extensible and pinpoint space of cable
Electric field instrument.
Background technique
Space electric field instrument is mainly made of signal processing unit, electric field instrument cable and spherical sensors, wherein spherical sensing
Device is installed on boom top, and signal processing unit is installed on boom system end, is realized by the electric field instrument cable inside boom spherical
The electrical connection of sensor and signal processing unit, satellite launch protrusive rod are in rounding state, and boom is unfolded after satellite launch,
Electric field instrument spherical sensors are pushed in nearly 5 meters of the space of satellite body.
Space electric field instrument cable is the device for connecting electric field instrument signal processing unit and spherical sensors, and effect has three:
First, realize the signal transmission between electric field instrument signal processing unit and spherical sensors；Second, cooperation boom accurately controls ball
The distance of shape sensor stretching satellite body；Third can collapse, expansion with boom, not occur winding, knotting phenomenon mutually.
Space electric field instrument is the high precision apparatus for carrying out the continuous dynamic electric field information measurement in ionosphere, utilizes double probe electric fields
Detection principle, probe are mounted on the boom top stretched out from satellite body, are immersed in the plasma ambient of space and couple and feel
Certain relative potentials are answered, push away electric field strength using the potential difference of two point probe of space is counter later.In view of satellite speed and
Earth's magnetic field, the electric field of two o'clock under terrestrial coordinate system are as follows:
In formula: u1And u2With the potential in situ for being respectively point 1 and point 2；For from point 1 to the vector of point 2；For system
Movement velocity vector；For the magnetic vector of system position.
Formula (1) is that vector equation needs to carry out electric field on three Spatial Dimensions if it is desired to obtain space point electric field strength
The measurement of component, therefore 4 probes not in the same plane is at least needed to measure.Space electric field instrument exactly utilizes 4
Spherical sensors in the same plane do not carry out the accurate measurement of space potential.Known by formula (1), to precise measurement electric-field strength
Degree, needs precise measurement potential u, distance d, satellite velocities v and geomagnetic field intensity B between sensor.Wherein speed v and magnetic field strength
B is totally provided by satellite, and potential u is to need electric field instrument precise measurement, it follows that distance d is quantitative values and needs electric field instrument
Cable accurately controls.
Secondly, electric field instrument spherical sensors are mounted on boom top, the electric field instrument electricity by being mounted on inside boom is needed
Cable transmit spherical sensors+15V, -15V power supply, spherical sensors remote temperature sensing signal, spherical sensors bias current signal and
Spherical sensors induced potential signal, according to the demand of electric field instrument detection accuracy, sensor cable needs to have good shielding
Effect reduces from extraneous interference noise, improves potential measurement precision.
Furthermore electric field instrument cable is installed on inside boom and boom cooperation accurately to control the length of boom expansion, due to
Electric field instrument detection is accurate to be required, it is necessary to the thermal expansion coefficient of strict control cable, tensile strength, in this way could by sensor it
Between distance variation control to sufficiently small, to control and can connect the variation of distance influences resulting on electric field measurement
By in the range of.
Summary of the invention
In view of this, the present invention provides a kind of extensible and pinpoint space electric field instrument of cable, electric field instrument is answered
Conjunction cable is extensible and is accurately positioned.
The technical solution adopted by the present invention is as follows:
The extensible and pinpoint space electric field instrument of a kind of cable, comprising: composite cable, reel, conducting slip ring, light
Electric counter, self-locking motor, end connector, apical connector, elastic roll, signal processing unit and spherical sensors；
Composite cable is wound on a bobbin, and one end is drawn by the conducting slip ring installed inside reel is connected to end connection
Device, the composite cable other end penetrate elastic roll center, are connected on elastic roll top with apical connector；End connector
It is connect with signal processing unit, apical connector is connect with spherical sensors, constitutes electric field instrument signal transmission path；
Elastic roll is in helical compression state, and self-locking motor power-up rotation release composite cable, elastic roll is gradually
It flicks, composite cable is driven to gradually spread out, reel edge is equipped with photoelectric counter, controls reel according to photoelectric counter and turns
Dynamic circle number, to control composite cable length of run；When composite cable is deployed into setting length, self-locking motor power-off is locked.
Further, the composite cable includes insulating sheath, external shielding layer, Kevlar core, conducting wire and shielding line；
Centered on Kevlar core, conducting wire, shielding line are distributed in around Kevlar core, while conducting wire, shielding line are outer by outer
Shielded layer package, the external shielding layer is outer to be wrapped up by insulating sheath；
Kevlar core both ends are mechanically fixedly connected with boom corresponding site, and external shielding layer and carrying platform are structurally
Be connected, one end of conducting wire and shielding line passes through conducting slip ring and is connected to signal processing unit, conducting wire and shielding line it is another
End is connected with spherical sensors；While shielding line shielded layer is with connecing electric field instrument internal signal.
Further, the electric field instrument signal is transmitted using featuring diplonema redundancy, and two wire transmissions are the same as signal all the way, two screens
Line transmission is covered with signal all the way.
Further, the space electric field instrument further comprises directive wheel, and the composite cable other end is worn after bypassing directive wheel
Enter elastic roll center.
The utility model has the advantages that
1, the present invention controls the circle number of reel rotation by photoelectric counter, to control composite cable length of run, leads to
It crosses extensible and pinpoint cable and accurately controls boom length, be finally reached the mesh of accurate control spherical sensors position
's.
2, composite cable of the invention has the tensile property of lesser thermal expansion coefficient and some strength, and length is with the external world
Temperature change is small, and length variation is small after electric field instrument cable-uncoiling, reduces the electric field intensity measuremenrt error that distance change introduces.
3, electric field instrument internal signal of the present invention is all made of featuring diplonema redundancy transmission, the high reliablity of signal transmission.
4, composite cable of the invention changes the composite cable direction of motion around elastic roll center is penetrated after directive wheel,
Keep whole device structure more compact, while keeping linear movement direction.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is space electric field instrument composite cable structural schematic diagram of the present invention；
Fig. 3 is space electric field instrument conductive slip ring schematic of the present invention.
Wherein, 1- reel Storage Box, 2- bottom plate, 3- directive wheel, 4- composite cable, 5- are led around cylinder pedestal, 6- reel, 7-
Electric slip ring, 8- photoelectric counter, 9- self-locking motor, 10- end connector, 11- elastic roll, 12- apical connector, 13- are exhausted
Edge sheath, 14- external shielding layer, 15- conducting wire, 16- lead conductor, 17- shielding line, 18- shielding line shielded layer, 19- shielding line are led
Body, 20- Kevlar core, 21- rotor wire, 22- slip-ring rotor, 23- slip ring mounting cap, 24- slip ring stator, 25- stator conductor.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The extensible and pinpoint space electric field instrument of cable provided by the invention, comprising: reel Storage Box 1, bottom plate 2,
Directive wheel 3, composite cable 4 are connected around cylinder pedestal 5, reel 6, conducting slip ring 7, photoelectric counter 8, self-locking motor 9, end
Device 10, elastic roll 11, apical connector 12, signal processing unit and spherical sensors.
As shown in Figure 1, be respectively mounted on a base plate 2 around cylinder pedestal 5, reel Storage Box 1, directive wheel 3 and end connector 10,
Conducting slip ring 7 and reel 6 are mounted on cylinder pedestal 5 after assembling, and photoelectric counter 8 and self-locking motor 9 are mounted on around cylinder bottom
It is used cooperatively on seat 5 with reel 6.Composite cable 4 is wrapped on reel 6, and one end passes through the conduction installed inside reel 6
Slip ring 7, which draws, is connected to end connector 10, and the other end of composite cable 4 bypasses directive wheel 3, passes through reel Storage Box 1 and elasticity volume
The center of cylinder 11 is connected with apical connector 12.Electric field instrument signal processing unit is connect with end connector 10, and electric field instrument is spherical
Sensor is connect with apical connector 12, electric field instrument cable connection signal processing unit and spherical sensors in this way.
When boom is loaded in satellite, elastic roll 11 is contracted in reel Storage Box 1 and is locked by pin, and elastic roll 11 is received
In reel Storage Box 1, composite cable 4 is coiled on reel 6 for contracting, and boom and electric field instrument cable are in contraction state transmitting and rise
Sky, dress star size is 2 size of bottom plate.
After satellier injection, the power-up rotation of self-locking motor 9 is rotated towards the direction of release composite cable 4, due to elastic roll
11 are in helical compression state, and as self-locking motor 9 discharges composite cable 4, pin unlock, elastic roll 11 is gradually flicked,
Composite cable 4 is driven to gradually spread out.6 edge of reel has grating, and photoelectric counter 8 is logical when being rotated by record reel 6
The raster count crossed reaches set value, self-locking motor 9 when photoelectric counter 8 records number to calculate the length of the expansion of composite cable 4
It stops operating locked, composite cable 4 is deployed into setting length, the length that thus accurately control composite cable 4 is unfolded.
Electric field instrument cable operating condition can undergo -30 DEG C~+70 DEG C temperature ranges, the composite cable 4 in the present embodiment have compared with
Low thermal expansion coefficient, length caused by cold and hot expansion vary less, moreover, because composite cable 4 is in satellite operating lifetime week
The elastic force of elastic roll 11 is constantly subjected in phase, composite cable 4 has the tensile property of some strength, and length is not because of the length of elastic force
Phase exists and changes.As shown in Fig. 2, composite cable 4 include insulating sheath 13, external shielding layer 14, Kevlar core 20, conducting wire 15 and
Shielding line 17, centered on Kevlar core 20, conducting wire 15, shielding line 17 are evenly distributed on around Kevlar core 20, while conducting wire
15, shielding line 17 is outer is wrapped up by external shielding layer 14, and external shielding layer 14 is outer to be wrapped up by insulating sheath 13.
Kevlar core 20 is Kevlar material fabric, has lower temperature expansion coefficient and more stable tension energy
Power, 20 both ends of Kevlar core are connect by way of being mechanically fixed with boom corresponding site, and the elastic force of elastic roll 11 is always
It is loaded on the Kevlar core 20 at 4 center of composite cable, therefore, length is not with temperature and length after electric field instrument composite cable 4 is unfolded
The presence of phase elastic force and change.
Electric field instrument needs to transmit multiple signals, and wherein bias current signal and sensor electric potential signal are small-signals, holds
Vulnerable to external interference.Electric field instrument cable is about five meters, in order to reduce the interference of long-line transmission, has carried out insulation and ground connection sets
Meter, to guarantee electric field instrument cable transmission performance.Specific implementation measure is as follows:
Insulating sheath 13 is by the external shielding layer 14 of composite cable 4 and boom structural insulation, while by the external screen of composite cable 4
It covers layer 14 and is structurally connected with satellite platform is carried.Electric field instrument internal signal is transmitted in composite cable 4, conducting wire 15
Lead conductor 16 transmit electric field instrument remote temperature sensing signal, shape sensor+15V, -15V power supply, the shielding line conductor of shielding line 17
19 transmission spherical sensors bias currents and spherical sensors induced potential the two small-signals, while by the screen of shielding line 17
Line shielded layer 18 is covered to be connected on electric field instrument signal ground.Outer bound pair electric field instrument is reduced by external shielding layer 14 with connecing satellite structure first
The interference of cable transmission signal with connecing electric field instrument internal signal secondly by the shielding line shielded layer 18 of shielding line 17 excludes electricity
Interference of other signals to this two-way small-signal of spherical sensors bias current and spherical sensors induced potential inside the instrument of field.
Electric field instrument internal signal is all made of featuring diplonema redundancy transmission, i.e. a signal is passed by two separate conductors transmission, two conducting wires 15
Defeated same signal all the way, two shielding lines 17 are transmitted with signal all the way.
Due to testing, testing before satellite launch, boom needs to carry out the expansion of tens of wheels, shrinkage operation, electric field instrument
Cable one end is connect with end connector 10, and one end is connect with apical connector 12, needs to prevent in 6 rotation process of reel
There is phenomena such as winding mutually, knotting in composite cable 4, and specific implementation measure is as follows:
The rotor of all conducting wires 15 and shielding line 17 inside reel 6 respectively with conducting slip ring 7 is led in composite cable 4
Line 21 is connected with each other, and slip ring is mounted on 6 shaft core position of reel by slip ring mounting cap 23, and stator conductor 25 is pierced by reel 6
After be connected on end connector 10, in 6 rotation process of reel, slip-ring rotor 22 and slip ring stator 24 are relatively rotated, this
When stator conductor 25 remained stationary relative to bottom plate 2, rotor wire 21 is remained stationary relative to reel 6.Conducting slip ring 7 is connected
It is connected on electric field instrument wired signal transmission path, is eliminated by the rotation of conducting slip ring 7 due to reel 6 then causes and is compound
Axial torsion that cable 4 is subject to is not wound mutually during being realized electric field instrument cable-uncoiling with this, being collapsed, is knotted.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1. a kind of extensible and pinpoint space electric field instrument of cable characterized by comprising composite cable, is led at reel
Electric slip ring, photoelectric counter, self-locking motor, end connector, apical connector, elastic roll, signal processing unit and spherical shape
Sensor；
Composite cable is wound on a bobbin, and one end is drawn by the conducting slip ring installed inside reel is connected to end connector,
The composite cable other end penetrates elastic roll center, is connected on elastic roll top with apical connector；End connector with
Signal processing unit connection, apical connector are connect with spherical sensors, constitute electric field instrument signal transmission path；
Elastic roll is in helical compression state, self-locking motor power-up rotation release composite cable, and elastic roll gradually flicks,
Composite cable is driven to gradually spread out, reel edge is equipped with photoelectric counter, controls reel rotation according to photoelectric counter
Number is enclosed, to control composite cable length of run；When composite cable is deployed into setting length, self-locking motor power-off is locked.
2. the extensible and pinpoint space electric field instrument of cable as described in claim 1, which is characterized in that the compound electric
Cable includes insulating sheath, external shielding layer, Kevlar core, conducting wire and shielding line；
Centered on Kevlar core, conducting wire, shielding line are distributed in around Kevlar core, while conducting wire, shielding line are outer by external shield
Layer package, the external shielding layer is outer to be wrapped up by insulating sheath；
Kevlar core both ends are mechanically fixedly connected with boom corresponding site, and external shielding layer is structurally connected with carrying platform
Connect, one end of conducting wire and shielding line passes through conducting slip ring and is connected to signal processing unit, the other end of conducting wire and shielding line with
Spherical sensors are connected；While shielding line shielded layer is with connecing electric field instrument internal signal.
3. the extensible and pinpoint space electric field instrument of cable as claimed in claim 2, which is characterized in that the electric field instrument
Signal is transmitted using featuring diplonema redundancy, and two wire transmissions are with signal all the way, and two shielding line transmission are the same as signal all the way.
4. the extensible and pinpoint space electric field instrument of cable as described in claim 1, which is characterized in that the space electricity
Field instrument further comprises directive wheel, and the composite cable other end penetrates elastic roll center after bypassing directive wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811550348.2A CN109813970B (en) | 2018-12-18 | 2018-12-18 | Cable can extend and space electric field appearance of accurate positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811550348.2A CN109813970B (en) | 2018-12-18 | 2018-12-18 | Cable can extend and space electric field appearance of accurate positioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109813970A true CN109813970A (en) | 2019-05-28 |
| CN109813970B CN109813970B (en) | 2021-05-28 |
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ID=66602105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811550348.2A Active CN109813970B (en) | 2018-12-18 | 2018-12-18 | Cable can extend and space electric field appearance of accurate positioning |
Country Status (1)
| Country | Link |
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| CN (1) | CN109813970B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110466810A (en) * | 2019-07-19 | 2019-11-19 | 北京空间飞行器总体设计部 | The space-environment simulator and its installation method of a kind of roll type boom mechanism |
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| Publication number | Publication date |
|---|---|
| CN109813970B (en) | 2021-05-28 |
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