CN103220899A - Variable grounding control device, system and method for shielding layer, and engineering machine - Google Patents
Variable grounding control device, system and method for shielding layer, and engineering machine Download PDFInfo
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- CN103220899A CN103220899A CN2013101115031A CN201310111503A CN103220899A CN 103220899 A CN103220899 A CN 103220899A CN 2013101115031 A CN2013101115031 A CN 2013101115031A CN 201310111503 A CN201310111503 A CN 201310111503A CN 103220899 A CN103220899 A CN 103220899A
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Abstract
The invention discloses a variable grounding control device, a variable grounding system and a variable grounding method for a shielding layer of an electric control system, and an engineering machine. The device comprises a receiver and a controller, wherein the receiver is used for receiving electromagnetic interference frequency coupled by the electric control system; and the controller is connected with the receiver, and is used for determining a grounding scheme of the shielding layer according to the electromagnetic interference frequency and an interference frequency threshold value, and outputting a group of switching value control signals which corresponds to the grounding scheme so as to control a group of grounding switches connected between the shielding layer and the ground. According to the technical scheme, the switch-off of the grounding switches can be adjusted in real time according to the field electromagnetic interference condition, and a variable grounding way is realized, so that the defect of difficulty in meeting the requirement of high interference resistance in a complicated and variable environment by adopting a single grounding way is overcome, and the interference resistance of the electric control system is improved.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of type variable ground connection control device, system, method and engineering machinery that is used for the screen of electric-control system.
Background technology
In recent years, serious day by day along with electromagnetic interference, it is more and more that electromagnetic compatibility problem appears in various device.Be the ability of the anti-electromagnetic interference that improves electrical system, Weak electric-signal cable generally all is equipped with good screen and earth point.Yet for the screen of dead earth point, its electromagnetic resonance point is fixing, therefore under different electromagnetic interference frequency ranges, can not keep best shield effectiveness.
At different interference bands, screen can adopt different earthing modes, to obtain different shield effectivenesses.For example, for the electromagnetic interference of frequency electromagnetic waves, screen can adopt multipoint earthing can reach shield effectiveness preferably, and for the interference electromagnetic interference of low frequency type, screen adopts the shield effectiveness of single-point grounding better.Yet, adopt fixing bonding mode, under different interference environments, be difficult to the shield effectiveness that reaches good.For mobile devices such as engineering machinery, because the frequent conversion of construction environment, may face various interference source disturbs, as high voltage transmission line, radio broadcasting launching tower, mobile communication launching tower, pulse launching tower etc., if fixing ground connection pattern is adopted in the shielding of electrical system, then be difficult to the antijamming capability that reaches good, even influence the stability of electric-control system.
Summary of the invention
The purpose of this invention is to provide a kind of type variable ground connection control device, system, method and engineering machinery that is used for the screen of electric-control system, to realize the earthing mode of dynamic adjustments screen.
To achieve these goals, the invention provides a kind of type variable ground connection control device that is used for the screen of electric-control system, this device comprises: receiver is used to receive the electromagnetic interference frequency that described electric-control system is coupled; And controller, be connected with described receiver, be used for determining the grounding scheme of described screen according to described electromagnetic interference frequency and interfering frequency threshold value, and export one group of switching value control signal corresponding with described grounding scheme, with the winding ground switch of control connection between described screen and ground.
The present invention also provides a kind of type variable grounding system that is used for the screen of electric-control system, and this system comprises: electromagnetic interference detecting device is used to detect the electromagnetic interference frequency that described electric-control system is coupled; Above-mentioned control device is connected with described electromagnetic interference detecting device; And a winding ground switch, be connected between described screen and the ground, and according to described one group of switching value control signal action of described control device output.
The present invention also provides a kind of engineering machinery that comprises said system.
The present invention also provides a kind of type variable ground connection control method that is used for the screen of electric-control system, and this method comprises: the electromagnetic interference frequency that receives described electric-control system coupling; Determine the grounding scheme of described screen according to described electromagnetic interference frequency and interfering frequency threshold value; And export one group of switching value control signal corresponding with described grounding scheme, with the winding ground switch of control connection between described screen and ground.
Pass through technique scheme, can be according to the closure of the electromagnetic interference situation real-time regulated earthed switch at scene, realize the earthing mode of type variable, solve the defective that adopts single earthing mode to be difficult in environment complicated and changeable, satisfy good resistance interference performance needs with this, improve the antijamming capability of electric-control system.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the block diagram of type variable ground connection control device according to the embodiment of the present invention;
Fig. 2 is the ground connection schematic diagram of the screen of electric-control system according to the embodiment of the present invention;
Fig. 3 is the block diagram of type variable grounding system according to the embodiment of the present invention; And
Fig. 4 is the flow chart of type variable ground connection control method according to the embodiment of the present invention.
Description of reference numerals
10 type variable ground connection control device, 101 receivers, 102 controllers
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is the block diagram of type variable ground connection control device according to the embodiment of the present invention.As shown in Figure 1, this device can comprise: receiver 101 is used to receive the electromagnetic interference frequency that electric-control system is coupled; And controller 102, be connected with described receiver 101, be used for determining the grounding scheme of the screen of electric-control system according to described electromagnetic interference frequency and interfering frequency threshold value, and export one group of switching value control signal corresponding with described grounding scheme, with control connection between described screen 20 and ground winding ground switch 40(such as K1, K2 among Fig. 2, K3 ..., Kn).The quantity of earthed switch 40 can be set according to product and actual needs.
Described interfering frequency threshold value is the interfering frequency value that screen (both-end ground connection, multiple spot node for example, single-end earthed) under a certain earthing mode can obtain best antijamming capability.Electric-control system for certain product, can test the antijamming capability under every kind of earthing mode in advance, to determine interfering frequency threshold value corresponding under every kind of earthing mode, utilize above-mentioned type variable ground connection control device to come to select suitable earthing mode then according to the electromagnetic interference environment of reality.
For example, adopting under the situation of mode single-end earthed (K1 or Kn closure), it is A1 that electric-control system can obtain the pairing threshold value of best antijamming capability, when the electromagnetic interference frequency of described electric-control system coupling surpassed this threshold value A 1, adopting single-end earthed, mode can not satisfy the anti-interference requirement of system.(K1 and Kn) closure under the situation that adopts the both-end earthing mode, it is A2 that electric-control system can obtain the pairing threshold value of best antijamming capability, when described electromagnetic interference frequency surpasses this threshold value A 2, adopt the both-end earthing mode can not satisfy the anti-interference requirement of system.
Controller 102 is after receiving the described electromagnetic interference frequency P that is transmitted by receiver 101, and it can compare this electromagnetic interference frequency P and interfering frequency threshold value A 1 earlier.If 0＜P＜A1, then controller 102 can determine electric-control system screen 20 grounding scheme in the closed described winding ground switch 40 respectively with two earthed switches that the two ends of described screen 20 are connected in one, just K1 or Kn, afterwards, controller 102 (for example can send one group of switching value signal, if n=4, then controller 102 can send 1000 or 0001 switching value signal), with control K1 or Kn closure.
If A1≤P＜A2, then controller 102 can determine that the grounding scheme of the screen 20 of electric-control system is two earthed switches that are connected with the two ends of described screen 20 respectively in the closed described winding ground switch 40, just K1 and Kn, afterwards, controller 102 can send one group of switching value signal and control K1 and Kn closure.
If A2≤P, then controller 102 can determine that the grounding scheme of the screen 20 of electric-control system is at least three earthed switches in the closed described winding ground switch 40, for example, and K1, K2 and Kn, afterwards, controller 102 can send one group of switching value signal and control K1, K2 and Kn closure.
Thus, by utilizing the closure of type variable ground connection control device provided by the invention according to the electromagnetic interference FREQUENCY CONTROL one winding ground switch of real-time electric-control system coupling, be implemented in the different electromagnetic interference environments with this, can dynamically change the earthing mode of the screen of electric-control system, thereby solve the defective that adopts single earthing mode to be difficult in environment complicated and changeable, satisfy good resistance interference performance needs, improve the antijamming capability of electric-control system.
Should be understood that, though above described the execution mode of determining earthing mode according to the first interfering frequency threshold value A 1 and the second interfering frequency threshold value A 2, but the invention is not restricted to this, also can determine earthing mode pairing according to other interfering frequency threshold values with it, as described above consistent of its method and principle just do not given unnecessary details herein.
Fig. 3 is the block diagram of type variable grounding system according to the embodiment of the present invention.As shown in Figure 3, this system can comprise: electromagnetic interference detecting device 30 is used to detect the electromagnetic interference frequency that described electric-control system is coupled; Above-mentioned type variable ground connection control device 10 is connected with described electromagnetic interference detecting device 30; And a winding ground switch 40, be connected between described screen 20 and the ground, and according to described one group of switching value control signal action of described type variable ground connection control device 10 outputs.
Said system can be applied in the engineering machinery.
Fig. 4 is the flow chart of type variable ground connection control method according to the embodiment of the present invention.As shown in Figure 4, this method can comprise: the electromagnetic interference frequency P(401 that receives described electric-control system coupling).Afterwards, can determine the grounding scheme of described screen according to described electromagnetic interference frequency P and interfering frequency threshold value.
For example, described interfering frequency threshold value for example can comprise the first interfering frequency threshold value A 1 and the second interfering frequency threshold value A 2.Under the situation of described electromagnetic interference frequency P, determine that described grounding scheme is one (K1 or Kn) in two earthed switches that are connected with the two ends of described screen respectively in the closed winding ground switch that is connected between described screen and the ground less than the described first interfering frequency threshold value A 1; Described electromagnetic interference frequency P more than or equal to described first interfering frequency threshold value A 1 and situation less than the described second interfering frequency threshold value A 2 under, determine that described grounding scheme is two earthed switches (K1 and Kn) that are connected with the two ends of described screen respectively in the closed described winding ground switch; And under the situation of described electromagnetic interference frequency P, determine that described grounding scheme is at least three earthed switches (for example, K1, K2 and Kn) in the closed described winding ground switch more than or equal to the described second interfering frequency threshold value A 2.
After determining grounding scheme, can export one group of switching value control signal corresponding, with the winding ground switch of control connection between described screen and ground with described grounding scheme.For example, under the situation of described electromagnetic interference frequency P less than the described first interfering frequency threshold value A 1, one (403) closures in two earthed switches that control is connected with the screen two ends respectively; Described electromagnetic interference frequency P more than or equal to described first interfering frequency threshold value A 1 and situation less than the described second interfering frequency threshold value A 2 under, two earthed switches (405) closure of being connected with the screen two ends respectively of control; And under the situation of described electromagnetic interference frequency P, control at least three earthed switches (406) closure in the winding ground switch more than or equal to the described second interfering frequency threshold value A 2.
Thus, by type variable ground connection control device provided by the invention, system, method and engineering machinery, can be according to the closure of the electromagnetic interference situation real-time regulated earthed switch at scene, realize the earthing mode of type variable, solve the defective that adopts single earthing mode to be difficult in environment complicated and changeable, satisfy good resistance interference performance needs with this, improve the antijamming capability of electric-control system.
Below describe preferred implementation of the present invention in conjunction with the accompanying drawings in detail; but; the present invention is not limited to the detail in the above-mentioned execution mode; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in above-mentioned embodiment under reconcilable situation, can make up by any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (8)
1. type variable ground connection control device that is used for the screen of electric-control system is characterized in that this device comprises:
Receiver is used to receive the electromagnetic interference frequency that described electric-control system is coupled; And
Controller, be connected with described receiver, be used for determining the grounding scheme of described screen, and export one group of switching value control signal corresponding, with the winding ground switch of control connection between described screen and ground with described grounding scheme according to described electromagnetic interference frequency and interfering frequency threshold value.
2. control device according to claim 1 is characterized in that, described interfering frequency threshold value comprises the first interfering frequency threshold value and the second interfering frequency threshold value.
3. control device according to claim 2, it is characterized in that, described controller determines that described grounding scheme is one in two earthed switches that are connected with the two ends of described screen respectively in the closed described winding ground switch under the situation of described electromagnetic interference frequency less than the described first interfering frequency threshold value; Described electromagnetic interference frequency more than or equal to described first interfering frequency threshold value and situation less than the described second interfering frequency threshold value under, determine that described grounding scheme is two earthed switches that are connected with the two ends of described screen respectively in the closed described winding ground switch; And under the situation of described electromagnetic interference frequency, determine that described grounding scheme is at least three earthed switches in the closed described winding ground switch more than or equal to the described second interfering frequency threshold value.
4. type variable grounding system that is used for the screen of electric-control system is characterized in that this system comprises:
Electromagnetic interference detecting device is used to detect the electromagnetic interference frequency that described electric-control system is coupled;
According to any described control device of claim among the claim 1-3, be connected with described electromagnetic interference detecting device; And
One winding ground switch is connected between described screen and the ground, and moves according to described one group of switching value control signal of described control device output.
5. engineering machinery that comprises the described system of claim 4.
6. type variable ground connection control method that is used for the screen of electric-control system is characterized in that this method comprises:
Receive the electromagnetic interference frequency of described electric-control system coupling;
Determine the grounding scheme of described screen according to described electromagnetic interference frequency and interfering frequency threshold value; And
Export one group of switching value control signal corresponding, with the winding ground switch of control connection between described screen and ground with described grounding scheme.
7. method according to claim 6 is characterized in that, described interfering frequency threshold value comprises the first interfering frequency threshold value and the second interfering frequency threshold value.
8. method according to claim 7, it is characterized in that, under the situation of described electromagnetic interference frequency, determine that described grounding scheme is one in two earthed switches that are connected with the two ends of described screen respectively in the closed described winding ground switch less than the described first interfering frequency threshold value; Described electromagnetic interference frequency more than or equal to described first interfering frequency threshold value and situation less than the described second interfering frequency threshold value under, determine that described grounding scheme is two earthed switches that are connected with the two ends of described screen respectively in the closed described winding ground switch; And under the situation of described electromagnetic interference frequency, determine that described grounding scheme is at least three earthed switches in the closed described winding ground switch more than or equal to the described second interfering frequency threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310111503.1A CN103220899B (en) | 2013-04-01 | 2013-04-01 | A kind of screen type variable grounding control device, system, method and engineering machinery |
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| CN201310111503.1A CN103220899B (en) | 2013-04-01 | 2013-04-01 | A kind of screen type variable grounding control device, system, method and engineering machinery |
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| CN103220899A true CN103220899A (en) | 2013-07-24 |
| CN103220899B CN103220899B (en) | 2015-11-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108648874A (en) * | 2018-05-03 | 2018-10-12 | 中国核动力研究设计院 | A kind of double layer screen anti-jamming signal twin-core or quad cable |
| WO2019036917A1 (en) * | 2017-08-22 | 2019-02-28 | 深圳企管加企业服务有限公司 | Machine room electromagnetic interference monitoring method and apparatus based on internet of things, and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478119A (en) * | 2009-01-24 | 2009-07-08 | 国网电力科学研究院 | Earthing process for transforming plant protecting device shielding chamber |
| US20120019965A1 (en) * | 2010-07-20 | 2012-01-26 | Faxvog Frederick R | Continuous Uninterruptable AC Grounding System for Power System Protection |
| CN202602264U (en) * | 2012-04-06 | 2012-12-12 | 四川省送变电建设有限责任公司 | Anti-interference microcomputer protective relaying device |
-
2013
- 2013-04-01 CN CN201310111503.1A patent/CN103220899B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478119A (en) * | 2009-01-24 | 2009-07-08 | 国网电力科学研究院 | Earthing process for transforming plant protecting device shielding chamber |
| US20120019965A1 (en) * | 2010-07-20 | 2012-01-26 | Faxvog Frederick R | Continuous Uninterruptable AC Grounding System for Power System Protection |
| CN202602264U (en) * | 2012-04-06 | 2012-12-12 | 四川省送变电建设有限责任公司 | Anti-interference microcomputer protective relaying device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019036917A1 (en) * | 2017-08-22 | 2019-02-28 | 深圳企管加企业服务有限公司 | Machine room electromagnetic interference monitoring method and apparatus based on internet of things, and storage medium |
| CN108648874A (en) * | 2018-05-03 | 2018-10-12 | 中国核动力研究设计院 | A kind of double layer screen anti-jamming signal twin-core or quad cable |
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| CN103220899B (en) | 2015-11-25 |
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