CN103220899B - A kind of screen type variable grounding control device, system, method and engineering machinery - Google Patents
A kind of screen type variable grounding control device, system, method and engineering machinery Download PDFInfo
- Publication number
- CN103220899B CN103220899B CN201310111503.1A CN201310111503A CN103220899B CN 103220899 B CN103220899 B CN 103220899B CN 201310111503 A CN201310111503 A CN 201310111503A CN 103220899 B CN103220899 B CN 103220899B
- Authority
- CN
- China
- Prior art keywords
- electromagnetic interference
- threshold value
- group
- screen
- frequency threshold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of type variable grounding control device of the screen for electric-control system, system, method and engineering machinery.Described device comprises: receiver, for receiving the electromagnetic interference frequency of described electric-control system coupling; And controller, be connected with described receiver, for determining the grounding scheme of described screen according to described electromagnetic interference frequency and interfering frequency threshold value, and export one group of digital output modul signal corresponding with described grounding scheme, with the one group earthed switch of control connection between described screen and ground.Pass through technique scheme, can closed according to the real-time regulated ground switch of the electromagnetic interference situation at scene, realize the earthing mode of type variable, solve with this defect adopting single earthing mode to be difficult to meet good antijamming capability needs in environment complicated and changeable, improve the antijamming capability of electric-control system.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of type variable grounding control device of the screen for electric-control system, system, method and engineering machinery.
Background technology
In recent years, day by day serious along with electromagnetic interference, various equipment occurs that electromagnetic compatibility problem gets more and more.For improving the ability of the electromagnetism interference of electrical system, Weak electric-signal cable is generally all equipped with good screen and earth point.But for the screen of dead earth point, its electromagnetic resonance point is fixing, therefore under different electromagnetic interference frequency range, can not keep best shield effectiveness.
At different interference bands, screen can adopt different earthing modes, to obtain different shield effectivenesses.Such as, for the electromagnetic interference of frequency electromagnetic waves, screen can adopt multipoint earthing can reach good shield effectiveness, and for the interference electromagnetic interference of low frequency type, screen adopts the shield effectiveness of single-point grounding better.But, adopt fixing bonding mode, be difficult to reach good shield effectiveness under different interference environments.For the mobile devices such as engineering machinery, because construction environment often converts, the interference of various different interference source may be faced, as high voltage transmission line, radio broadcast transmissions tower, mobile communication launching tower, impulse ejection tower etc., if the shielding of electrical system adopts fixing ground connection pattern, then be difficult to reach good antijamming capability, even affect the stability of electric-control system.
Summary of the invention
The object of this invention is to provide a kind of type variable grounding control device of the screen for electric-control system, system, method and engineering machinery, to realize the earthing mode of dynamic adjustments screen.
To achieve these goals, the invention provides a kind of type variable grounding control device of the screen for electric-control system, this device comprises: receiver, for receiving the electromagnetic interference frequency of described electric-control system coupling; And controller, be connected with described receiver, for determining the grounding scheme of described screen according to described electromagnetic interference frequency and interfering frequency threshold value, and export one group of digital output modul signal corresponding with described grounding scheme, with the one group earthed switch of control connection between described screen and ground.
The present invention also provides a kind of type variable grounding system of the screen for electric-control system, and this system comprises: electromagnetic interference detecting device, for detecting the electromagnetic interference frequency of described electric-control system coupling; Above-mentioned control device, is connected with described electromagnetic interference detecting device; And one group of earthed switch, be connected between described screen and ground, and according to described one group of digital output modul signalizing activity that described control device exports.
The present invention also provides a kind of engineering machinery comprising said system.
The present invention also provides a kind of type variable ground connection control method of the screen for electric-control system, and the method comprises: the electromagnetic interference frequency receiving the coupling of described electric-control system; The grounding scheme of described screen is determined according to described electromagnetic interference frequency and interfering frequency threshold value; And the digital output modul signal that output one group is corresponding with described grounding scheme, with the one group earthed switch of control connection between described screen and ground.
Pass through technique scheme, can closed according to the real-time regulated ground switch of the electromagnetic interference situation at scene, realize the earthing mode of type variable, solve with this defect adopting single earthing mode to be difficult to meet good antijamming capability needs in environment complicated and changeable, improve the antijamming capability of electric-control system.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the block diagram of type variable grounding 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 grounding control device 101 receiver 102 controllers
Screen 30 electromagnetic interference detecting device 40 earthed switch of 20 electric-control systems
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the block diagram of type variable grounding control device according to the embodiment of the present invention.As shown in Figure 1, this device can comprise: receiver 101, for receiving the electromagnetic interference frequency of electric-control system coupling; And controller 102, be connected with described receiver 101, for the grounding scheme of the screen according to described electromagnetic interference frequency and interfering frequency threshold value determination electric-control system, and export one group of digital output modul signal corresponding with described grounding scheme, with the one group earthed switch 40(of control connection between described screen 20 and ground as the K1 in Fig. 2, K2, K3 ..., Kn).The quantity of earthed switch 40 can set according to product and actual needs.
Described interfering frequency threshold value is that screen (such as, single-end earthed, two sides earth, multiple spot node) under a certain earthing mode can obtain the interfering frequency value of best antijamming capability.For the electric-control system of certain product, can test the antijamming capability under often kind of earthing mode in advance, to determine interfering frequency threshold value corresponding under often kind of earthing mode, above-mentioned type variable grounding control device is then utilized to select suitable earthing mode according to the electromagnetic interference environment of reality.
Such as, when adopt single-end earthed mode (K1 or Kn close), the electric-control system threshold value that can obtain corresponding to best antijamming capability is A1, when the electromagnetic interference frequency that described electric-control system is coupled exceedes this threshold value A 1, adopt mode single-end earthed can not meet system rejection to disturbance requirement.When adopting two sides earth mode, (K1 and Kn) closes, the electric-control system threshold value that can obtain corresponding to best antijamming capability is A2, when described electromagnetic interference frequency exceedes this threshold value A 2, adopt two sides earth mode can not meet system rejection to disturbance requirement.
Controller 102 is after receiving the described electromagnetic interference frequency P transmitted by receiver 101, and this electromagnetic interference frequency P and interfering frequency threshold value A 1 can first compare by it.If 0<P<A1, then controller 102 can determine that the grounding scheme of the screen 20 of electric-control system is the one in two earthed switches be connected with the two ends of described screen 20 respectively in closed described one group of earthed switch 40, namely K1 or Kn, afterwards, controller 102 can send one group of on-off model (such as, if n=4, then controller 102 can send the on-off model of 1000 or 0001), close with control K1 or Kn.
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 be connected with the two ends of described screen 20 respectively in closed described one group of earthed switch 40, namely K1 and Kn, afterwards, controller 102 can send one group of on-off model to control K1 and Kn close.
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 closed described one group of earthed switch 40, such as, and K1, K2 and Kn, afterwards, can to send one group of on-off model closed to control K1, K2 and Kn for controller 102.
Thus, the closed of one group of earthed switch is controlled according to the electromagnetic interference frequency that real-time electric-control system is coupled by utilizing type variable grounding control device provided by the invention, realize in different electromagnetic interference environments with this, dynamically can change the earthing mode of the screen of electric-control system, thus solution adopts single earthing mode to be difficult to the defect meeting good antijamming capability needs in environment complicated and changeable, improves the antijamming capability of electric-control system.
Should be understood that, although described above is the execution mode determining earthing mode according to the first interfering frequency threshold value A 1 and the second interfering frequency threshold value A 2, but the present invention is not limited thereto, also can determine and the earthing mode corresponding to it according to other interfering frequency threshold values, its method and principle are consistent as described above, are not just repeating 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, for detecting the electromagnetic interference frequency of described electric-control system coupling; Above-mentioned type variable grounding control device 10, is connected with described electromagnetic interference detecting device 30; And one group of earthed switch 40, be connected between described screen 20 and ground, and according to described one group of digital output modul signalizing activity that described type variable grounding control device 10 exports.
Said system can be applied in 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, the method can comprise: the electromagnetic interference frequency P(401 receiving the coupling of described electric-control system).Afterwards, the grounding scheme of described screen can be determined according to described electromagnetic interference frequency P and interfering frequency threshold value.
Such as, described interfering frequency threshold value such as can comprise the first interfering frequency threshold value A 1 and the second interfering frequency threshold value A 2.When described electromagnetic interference frequency P is less than described first interfering frequency threshold value A 1, determine that described grounding scheme is close to be connected to described screen and the one (K1 or Kn) in two earthed switches be connected with the two ends of described screen respectively in group earthed switch of between ground; When described electromagnetic interference frequency P is more than or equal to described first interfering frequency threshold value A 1 and is less than described second interfering frequency threshold value A 2, determine that described grounding scheme is two earthed switches (K1 and Kn) be connected with the two ends of described screen respectively in closed described one group of earthed switch; And when described electromagnetic interference frequency P is more than or equal to described second interfering frequency threshold value A 2, determine that described grounding scheme is at least three earthed switches (such as, K1, K2 and Kn) in closed described one group of earthed switch.
After determining grounding scheme, one group of digital output modul signal corresponding with described grounding scheme can be exported, with the one group earthed switch of control connection between described screen and ground.Such as, when described electromagnetic interference frequency P is less than described first interfering frequency threshold value A 1, the one (403) controlled in two earthed switches be connected with screen two ends respectively closes; When described electromagnetic interference frequency P is more than or equal to described first interfering frequency threshold value A 1 and is less than described second interfering frequency threshold value A 2, two earthed switches (405) controlling to be connected with screen two ends respectively close; And when described electromagnetic interference frequency P is more than or equal to described second interfering frequency threshold value A 2, at least three earthed switches (406) controlled in one group of earthed switch close.
Thus, by type variable grounding control device provided by the invention, system, method and engineering machinery, can closed according to the real-time regulated ground switch of the electromagnetic interference situation at scene, realize the earthing mode of type variable, solve with this defect adopting single earthing mode to be difficult to meet good antijamming capability needs in environment complicated and changeable, improve the antijamming capability of electric-control system.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive 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.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different 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 (4)
1. for a type variable grounding control device for the screen of electric-control system, it is characterized in that, this device comprises:
Receiver, for receiving the electromagnetic interference frequency of described electric-control system coupling; And
Controller, be connected with described receiver, for determining the grounding scheme of described screen according to described electromagnetic interference frequency and interfering frequency threshold value, and export one group of digital output modul signal corresponding with described grounding scheme, with the one group earthed switch of control connection between described screen and ground;
Wherein, described interfering frequency threshold value comprises the first interfering frequency threshold value and the second interfering frequency threshold value, described controller, when described electromagnetic interference frequency is less than described first interfering frequency threshold value, determines that described grounding scheme is the one in two earthed switches be connected with the two ends of described screen respectively in closed described one group of earthed switch; When described electromagnetic interference frequency is more than or equal to described first interfering frequency threshold value and is less than described second interfering frequency threshold value, determine that described grounding scheme is two earthed switches be connected with the two ends of described screen respectively in closed described one group of earthed switch; And when described electromagnetic interference frequency is more than or equal to described second interfering frequency threshold value, determine that described grounding scheme is at least three earthed switches in closed described one group of earthed switch.
2. for a type variable grounding system for the screen of electric-control system, it is characterized in that, this system comprises:
Electromagnetic interference detecting device, for detecting the electromagnetic interference frequency of described electric-control system coupling;
Control device according to claim 1, is connected with described electromagnetic interference detecting device; And
One group of earthed switch, is connected between described screen and ground, and according to described one group of digital output modul signalizing activity that described control device exports.
3. one kind comprises the engineering machinery of system according to claim 2.
4., for a type variable ground connection control method for the screen of electric-control system, it is characterized in that, the method comprises:
Receive the electromagnetic interference frequency of described electric-control system coupling;
The grounding scheme of described screen is determined according to described electromagnetic interference frequency and interfering frequency threshold value; And
Export one group of digital output modul signal corresponding with described grounding scheme, with the one group earthed switch of control connection between described screen and ground;
Wherein, described interfering frequency threshold value comprises the first interfering frequency threshold value and the second interfering frequency threshold value, when described electromagnetic interference frequency is less than described first interfering frequency threshold value, determine that described grounding scheme is the one in two earthed switches be connected with the two ends of described screen respectively in closed described one group of earthed switch; When described electromagnetic interference frequency is more than or equal to described first interfering frequency threshold value and is less than described second interfering frequency threshold value, determine that described grounding scheme is two earthed switches be connected with the two ends of described screen respectively in closed described one group of earthed switch; And when described electromagnetic interference frequency is more than or equal to described second interfering frequency threshold value, determine that described grounding scheme is at least three earthed switches in closed described one group of earthed switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310111503.1A CN103220899B (en) | 2013-04-01 | 2013-04-01 | A kind of screen type variable grounding control device, system, method and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310111503.1A CN103220899B (en) | 2013-04-01 | 2013-04-01 | A kind of screen type variable grounding control device, system, method and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103220899A CN103220899A (en) | 2013-07-24 |
| CN103220899B true CN103220899B (en) | 2015-11-25 |
Family
ID=48818183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310111503.1A Active CN103220899B (en) | 2013-04-01 | 2013-04-01 | A kind of screen type variable grounding control device, system, method and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103220899B (en) |
Families Citing this family (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 |
Citations (2)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8878396B2 (en) * | 2010-07-20 | 2014-11-04 | Emprimus, Llc | Continuous uninterruptable AC grounding system for power system protection |
-
2013
- 2013-04-01 CN CN201310111503.1A patent/CN103220899B/en active Active
Patent Citations (2)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103220899A (en) | 2013-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107612577B (en) | A kind of channel selecting system, method and electronic equipment | |
| JP2016504007A5 (en) | ||
| CN104052531A (en) | Self-interference signal elimination method and device | |
| CN103220899B (en) | A kind of screen type variable grounding control device, system, method and engineering machinery | |
| CN104348497B (en) | A kind of wireless communication signal reception device and method | |
| CN104901725A (en) | Signal transmission device, positioner, signal transmission system and signal transmission method | |
| CN103515685A (en) | 4G 3db electric bridge | |
| US9543789B2 (en) | Apparatus and method for transmitting/receiving wireless energy in energy transmission system | |
| WO2014100843A3 (en) | Interface circuit for signal transmission | |
| CN106330734A (en) | Power line carrier communication routing device | |
| CN203340293U (en) | Low-power multi-antenna tunnel distribution coverage system | |
| CN104703194A (en) | Indoor distribution system and realizing method thereof | |
| CN104780603A (en) | Wireless location method in distributed antenna system | |
| CN108260129B (en) | Subway communication device and subway communication system | |
| CN105490024A (en) | Antenna control apparatus, method and electronic equipment | |
| CN204305357U (en) | A kind of LTE based on catv network registers one's residence the hardware structure of covering system | |
| CN203909501U (en) | Device capable of improving consistency of maximum signal-to-noise ratio of radio-frequency simulation antenna array | |
| CN110855325A (en) | Power line HPLC impedance transformation self-adaptive control method and device | |
| CN204377151U (en) | A kind of multi-frequency combination modular system with remote functionality | |
| CN206498403U (en) | A kind of satellite communication apparatus of achievable various mode transmission | |
| CN205751108U (en) | A kind of safety defense monitoring system | |
| CN202565387U (en) | Multi-path intelligent television signal receiver | |
| CN104007662A (en) | Method and device for improving maximum signal to noise ratio consistency of radio frequency artificial antenna array | |
| CN103872457A (en) | Antenna assembly, electronic device and switching method | |
| CN204810269U (en) | Signal transmission equipment, locator and signal transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |