CN205104290U - Weighing sensor cable - Google Patents
Weighing sensor cable Download PDFInfo
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- CN205104290U CN205104290U CN201520794874.9U CN201520794874U CN205104290U CN 205104290 U CN205104290 U CN 205104290U CN 201520794874 U CN201520794874 U CN 201520794874U CN 205104290 U CN205104290 U CN 205104290U
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- load cells
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- shielding layer
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Abstract
The utility model discloses a weighing sensor cable, include the conductor wire that outwards sets gradually by the center, first shielding layer, secondary shielding layer, band layer, restrictive coating. Wherein the conductor wire includes at least one leading electric wire and a ground wire. Leading electric wire is including the tinned conductor and the outer insulating layer at center, insulation layer package tinned conductor. The utility model provides a weighing sensor cable through setting up first shielding layer of aluminium strip and metal mesh grid secondary shielding layer, realizes better shielding effect to can satisfy simultaneously all has good shielding effect to high frequency and low frequency electromagnetic field. Consequently the utility model provides a weighing sensor cable has characteristics such as anti -electromagnetic interference, signal transmission are stable, characteristics such as longe -lived.
Description
Technical field
The utility model relates to a kind of cable, particularly relates to a kind of LOAD CELLS cable.
Background technology
LOAD CELLS is the high-precision sensor gravity on testee being converted by a certain percentage to gageable output signal, and the quality of the signal that LOAD CELLS transfers out directly has influence on the accuracy of measurement.The cable of LOAD CELLS is for transmitting the signal of telecommunication of LOAD CELLS measurement, and therefore in transmitting procedure, the performance of cable is directly connected to the accuracy of LOAD CELLS measurement.The signal of telecommunication transmitted in the longer cable of cable is also more easily affected by the external environment.Be exactly the magnetic field in environment to the factor that effect of signals in cable is maximum.Once the magnetic field of bad student's change in environment, then will produce induced current in the conductor of cable, this induced current directly just superposes with the signal of telecommunication transmitted in cable, changes the signal of telecommunication in cable completely, makes LOAD CELLS measure gravimetric value.If also LOAD CELLS or signal collecting device may be burnt out when induced current is excessive, result in greater loss.Prevent the best mode of induced current to be exactly add screen in the cable in prior art, namely with screen, cable is surrounded, prevent them to be subject to the impact of external electromagnetic field.
The magnetic field of different frequency needs to use different screens to reach better shield effectiveness, when the frequency of interfere with electromagnetic field is higher, utilize the eddy current produced in the metal material of low-resistivity, form the negative function to external electromagnetic wave, thus reach the effect of shielding.When disturbing electromagnetic frequency lower, the material of high permeability be adopted, thus make the magnetic line of force be limited in shield inside, preventing the space being diffused into shielding from going.Existing cable often adopts single screen, cannot meet characteristic different frequency magnetic field all to good shielding.
Utility model content
The utility model has designed and developed a kind of LOAD CELLS cable, and object is the defect solving cable shield weak effect in prior art, makes LOAD CELLS wired signal transmission reliable and stable.
The technical scheme that the utility model provides is:
A kind of LOAD CELLS cable, comprises the conductor wire, the first screen, secondary shielding layer, belting layer, the restrictive coating that are outwards set gradually by center.
Preferably, described conductor wire comprises at least one leading electric wire and a ground wire.
Preferably, described leading electric wire comprises the tinned conductor at center and outer field insulating barrier, and described insulating barrier wraps up described tinned conductor.
Preferably, described leading electric wire is provided with 4, and circumferentially arranges.
Preferably, described insulating barrier adopts polythene material.
Preferably, described first screen is aluminium strip screen.
Preferably, described secondary shielding layer is metal knitted screen.
Preferably, described belting layer adopts polyester material.
Preferably, described restrictive coating adopts TPR material.
Preferably, separator is provided with between described first screen and secondary shielding layer.
The beneficial effects of the utility model are: the utility model provides a kind of LOAD CELLS cable, by arranging aluminium strip first screen and metal net secondary shielding layer, realize better shield effectiveness, and can meet simultaneously to high and low frequency electromagnetic field, all there is good shield effectiveness.Therefore the LOAD CELLS cable that provides of the utility model, has the features such as the feature such as electromagnetism interference, stable signal transmission, life-span be long.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of LOAD CELLS cable described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, can implements according to this with reference to specification word to make those skilled in the art.
As shown in Figure 1, the utility model provides a kind of LOAD CELLS cable, comprises the conductor wire, the first screen 110, secondary shielding layer 120, belting layer 130, the restrictive coating 140 that are outwards set gradually by center.
Described conductor wire is positioned at the center of LOAD CELLS cable, and described conductor wire is made up of multiple leading electric wires 150 and a ground wire 160.Leading electric wire 150 is for the transducer voltage signal transmitting LOAD CELLS, and ground wire 160 is for ground protection.
Leading electric wire 150 comprises tinned conductor 151 and the outer field insulating barrier 152 at center, and described insulating barrier 152 is closely wrapped in outside tinned conductor 151, prevents tinned conductor 151 from leaking electricity.Described insulating barrier 152 adopts polythene material.Preferred as one, described leading electric wire 150 is provided with 4, and circumferentially arranges.
The first screen 110 and secondary shielding layer 120 is enclosed with successively outside conductor wire.Because cable is applied in LOAD CELLS, the principle of transducer converts the gravity acted on testee to gageable output signal by a certain percentage, and the performance index of LOAD CELLS mainly contain linearity error, hysteresis error, repeatability error, creep, zero temperature characteristic and sensitivity temperature characteristic etc.Therefore the quality of signal directly affects really property of weighing really, therefore needs to eliminate external environment to the impact of signal in conductor wire.Cable can produce magnetic field when transmission current, can have an impact to other cables of surrounding, and the magnetic field simultaneously around cable also can have an impact to the electric current in cable.The present invention is by arranging the first screen 110 and secondary shielding layer 120 carrys out the impact of armoured magnetic field on signal in cable.
Shielding is exactly to the isolation carrying out metal between two area of space, to control electric field, magnetic field and electromagnetic wave by a region to the induction in another region and radiation.Specifically, be surrounded with the interference source of shield by component, circuit, sub-assembly, cable or whole system exactly, prevent interfere with electromagnetic field to outdiffusion; With shield, receiving circuit, equipment or system are surrounded, prevent them to be subject to the impact of external electromagnetic field.Because shield all plays a part to absorb energy, reflected energy and counteracting energy, so shield has the function weakening interference to from the outside interference electromagnetic wave such as wire, cable, component, circuit or system and internal electrical magnetic wave.
Described first screen 110 and secondary shielding layer 120 outer surface are continuous, and the first screen 110 and secondary shielding layer 120 are wrapped in outside conductor wire, conductor wire can not be had and directly penetrate the first screen 110 and secondary shielding layer 120.This set prevents leakage field, to guarantee the reliability of shield effectiveness.
When the frequency of the interfere with electromagnetic field produced is higher, utilizes the eddy current produced in the metal material of low-resistivity, form the negative function to external electromagnetic wave, thus reach the effect of shielding.And when disturbing electromagnetic frequency lower, the material of high permeability be adopted, thus make the magnetic line of force be limited in shield inside, preventing the space being diffused into shielding from going.In some cases, if when requiring, to high and low frequency electromagnetic field, all there is good shield effectiveness, often adopt different metal material composition multilayer screen bodies.Therefore the LOAD CELLS cable that the utility model provides arranges two-layer screen, meets the shield effectiveness to high and low frequency electromagnetic field simultaneously, makes cable transmission signal more reliable and more stable.
In another embodiment, described first screen 110 is adopted as aluminium strip screen.The very thin thickness of aluminium strip screen, has good ductility simultaneously, and cracky can not increase the overall thickness of cable yet, is a kind of good screen.
In another embodiment, described secondary shielding layer 120 is metal knitted screen.Described metal knitted screen adopts beryllium copper silk, Monel silk or stainless steel wire to be woven into tubulose.
Wrap up belting layer 130 outside described secondary shielding layer 120, preferred as one, described belting layer 130 adopts polyester material.Polyester is the polymer general name obtained by polyalcohol and polyacid polycondensation.Main finger polyethylene terephthalate (PET), also comprising linear thermoplastic's resins such as polybutylene terephthalate (PBT) and polyarylate traditionally, is a class excellent performance, broad-spectrum engineering plastics.
Restrictive coating 140 is coated with in the outside of belting layer 130.Described external sheath layer 140 is as last one deck operator guards of cable; overall protection is played to cable; therefore external sheath layer 140 has corrosion-resistant, sludge proof characteristic, under high temperature, illumination, also can keep good stability, thus improves the useful life of cable.External sheath layer 140 also will have good resistance to wear simultaneously, is using the breakage that can not cause cable in transportation.Preferred as one, described restrictive coating 140 adopts TPR material.
In another embodiment, separator is provided with between described first screen 110 and secondary shielding layer 120, because secondary shielding layer 120 is metal knitted screen, it has the grid of braiding, and the first screen 110 is the aluminium strip screen of surface smoothing, the grid of braiding can leave impression on the aluminium strip screen of surface smoothing, even punctures aluminium strip screen, cause leakage field, affect shield effectiveness.By being provided with separator between the first screen 110 and secondary shielding layer 120, the first screen 110 and secondary shielding layer 120 being separated, protecting the integrality of the first screen 110 and secondary shielding layer 120.
The LOAD CELLS cable that the utility model provides, has the feature such as the feature such as electromagnetism interference, stable signal transmission, life-span length.
Although embodiment of the present utility model is open as above, but it is not restricted to listed in specification and execution mode utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend described.
Claims (10)
1. a LOAD CELLS cable, is characterized in that, comprises the conductor wire, the first screen, secondary shielding layer, belting layer, the restrictive coating that are outwards set gradually by center.
2. LOAD CELLS cable according to claim 1, is characterized in that, described conductor wire comprises at least one leading electric wire and a ground wire.
3. LOAD CELLS cable according to claim 2, is characterized in that, described leading electric wire comprises the tinned conductor at center and outer field insulating barrier, and described insulating barrier wraps up described tinned conductor.
4. LOAD CELLS cable according to claim 3, is characterized in that, described leading electric wire is provided with 4, and circumferentially arranges.
5. LOAD CELLS cable according to claim 3, is characterized in that, described insulating barrier adopts polythene material.
6. LOAD CELLS cable according to claim 1, is characterized in that, described first screen is aluminium strip screen.
7. LOAD CELLS cable according to claim 1, is characterized in that, described secondary shielding layer is metal knitted screen.
8. LOAD CELLS cable according to claim 1, is characterized in that, described belting layer adopts polyester material.
9. LOAD CELLS cable according to claim 1, is characterized in that, described restrictive coating adopts TPR material.
10. the LOAD CELLS cable according to any one of claim 1-9, is characterized in that, is provided with separator between described first screen and secondary shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794874.9U CN205104290U (en) | 2015-10-08 | 2015-10-08 | Weighing sensor cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794874.9U CN205104290U (en) | 2015-10-08 | 2015-10-08 | Weighing sensor cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205104290U true CN205104290U (en) | 2016-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520794874.9U Active CN205104290U (en) | 2015-10-08 | 2015-10-08 | Weighing sensor cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205104290U (en) |
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2015
- 2015-10-08 CN CN201520794874.9U patent/CN205104290U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |