CN103473920B - Anti-interference method and system for detection signal - Google Patents
Anti-interference method and system for detection signal Download PDFInfo
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- CN103473920B CN103473920B CN201210183752.7A CN201210183752A CN103473920B CN 103473920 B CN103473920 B CN 103473920B CN 201210183752 A CN201210183752 A CN 201210183752A CN 103473920 B CN103473920 B CN 103473920B
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- physical attribute
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Abstract
The invention provides a anti-interference method and a system for detection signals. The anti-interference method for detection signals comprises the steps of: 1, converting a detection signal into an actual value representing physical properties; and 2, filtering fluctuation of the actual value representing physical properties, or filtering fluctuation of a result from comparison of the fluctuation of the actual value representing physical properties with a corresponding preset value representing physical properties. The invention can be applied to an automatic control system in each field of metallurgy industry, effectively improves the stability and persistence of enterprise production, protects safety of equipment and people, greatly reduces waste inferior-quality products generated by unnecessary shutdown, reduce costs and improves efficiency.
Description
Technical field
The present invention relates to automatically control, more particularly to a kind of detection signal anti-interference method and system.
Background technology
With greatly developing and popularization and application for automated control technology, detection means is increasingly being applied to equipment control
In system.The measurement signal of detection means enters control program, by control program inter-process, directly participates in control.Therefore, examine
Survey the factors such as the degree of accuracy, stability and the antijamming capability of signal most important to equipment control automatic control level.Actually should
In, field measurement apparatus may be during long-term use because environmental factor causes measurement circuitry damaged, measurement apparatus
The reasons such as body slight damage, electromagnetic interference around measurement apparatus, power network fluctuation cause that measurement signal is interfered, but this is done
The signal disturbed does not arrive the stage that cannot be used seriously, that is to say, that measurement signal still can apply to the control of equipment, only
It is unstable measurement signal, fluctuates larger.If so disturbed detection signal signal participates in the control to equipment, having can
Misoperation can be produced, causes equipment to be damaged, or even the situation of casualties occurs, hence in so that there is safety in whole control system
Hidden danger.
The content of the invention
It is an object of the invention to provide the anti-interference method and system of a kind of detection signal.
The invention provides a kind of anti-interference method of detection signal, including：
Step 1, detection signal is converted to the actual value for representing physical attribute；
Step 2, filters the fluctuation of the actual value for representing physical attribute or filters the actual value for representing physical attribute
To the fluctuation of the comparative result of the corresponding preset value of the representative physical attribute of storage.
In one example, the physical attribute for steel coil transporting trolley position or steel coil transporting trolley bracket highly.
In one example, in step 2, using signal lag filter the actual value for representing physical attribute fluctuation or
Person represents the actual value of physical attribute and the fluctuation of the comparative result of the corresponding preset value of the representative physical attribute of storage.
In one example, in step 1, detection signal is exported by linear encoder or laser encoder.
The fluctuation of the actual value for representing physical attribute is filtered using signal lag or represent the reality of physical attribute
Value includes to the fluctuation of the comparative result of the corresponding preset value of the representative physical attribute of storage：
Step 21, at the first moment, detects the actual value for representing physical attribute or described represents physical attribute
Actual value to storage representative physical attribute corresponding preset value comparative result after, start timer；
Step 22, the second moment after timer expiration, if second moment detect described represent physics
The actual value of attribute is identical with the actual value for representing physical attribute detected at the first moment, or at second moment
The actual value for representing physical attribute for detecting to storage representative physical attribute corresponding preset value comparative result with
The actual value for representing physical attribute and the corresponding preset value of the representative physical attribute of storage detected at the first moment
Comparative result is identical, then export the actual value for representing physical attribute that is detected at the second moment or described represent physics
The actual value of attribute to storage representative physical attribute corresponding preset value comparative result.
The invention provides a kind of anti-interference system of detection signal, including：
Data processing module, the actual value of physical attribute is represented for detection signal to be converted to；
Detection signal disturbs filter block, for filtering the fluctuation of the actual value for representing physical attribute or filtering representative
The actual value of physical attribute to storage representative physical attribute corresponding preset value comparative result fluctuation.
In one example, the physical attribute for steel coil transporting trolley position or steel coil transporting trolley bracket highly.
In one example, detection signal interference filter block is signal lag device.
In one example, detection signal is exported by linear encoder or laser encoder.
Signal lag device, for detecting the actual value for representing physical attribute at the first moment or described representing thing
The actual value of attribute is managed to after the comparative result of the corresponding preset value of the representative physical attribute of storage, starts timer；
The second moment after timer expiration is additionally operable to, in the physical attribute that represents that second moment detects
Actual value is identical with the actual value for representing physical attribute detected at the first moment, or is detected at second moment
The actual value for representing physical attribute to storage representative physical attribute corresponding preset value comparative result with first
The actual value for representing physical attribute that moment detects to storage representative physical attribute corresponding preset value comparing knot
When really identical, the output actual value for representing physical attribute that is detected at the second moment or the physical attribute that represents
Actual value to storage representative physical attribute corresponding preset value comparative result.
Present invention can apply to metallurgy industry every field on automatic control system in, effectively improve enterprise production it is steady
The safety of qualitative and continuation, protection equipment and life, significantly reduces unnecessary shutdown and produces waster, reduces into
This, improves efficiency.
Brief description of the drawings
Fig. 1 is the anti-interference method flow chart of laser encoder detection signal of the invention；
Fig. 2 is the anti-interference method flow chart of linear encoder detection signal of the invention；
Fig. 3 is the delayer workflow diagram that the present invention is provided.
Specific embodiment
The present invention is with the PLC control system of Siemens S7-400 series of products, particularly the control system of steel coil transporting trolley
Illustrated as a example by system, but it is to be understood that, the control system of other application detection signal can also similarly using this hair
It is bright.
Steel coil transporting trolley is widely used in metallurgy industry Metallurgical Enterprise, and its major function is to load and unload and transport steel
Volume.The adjustable height and walking position of steel coil transporting trolley car body are automatically controlled.There are two detection dresses in the controls
Put for detecting steel coil transporting trolley lifting and steel coil transporting trolley position, two detection means are small namely for steel coil transportation
The linear encoder and the laser encoder for the detection of steel coil transporting trolley position of car adjustable height measurement.Specific control process
It is as follows：
（1）：Steel coil transporting trolley is run under certain saddle, is automatically stopped, and steel coil transporting trolley bracket automatic lifting is extremely
Setting height, holds up coil of strip, and automatically walk is transported coil of strip to other location of saddle support, is automatically stopped, under steel coil transporting trolley bracket
Setting height is down to, coil of strip is placed on the saddle of the position；
（2）：Steel coil transporting trolley is run under certain saddle, steel coil transporting trolley bracket automatic lifting to setting height,
Coil of strip is held up, is then transported on coil of strip to reel of uncoiler；
（3）：Steel coil transporting trolley is run under coiling machine position, and bracket automatic lifting catches coiling machine in setting height
Coil of strip on reel, dolly movement, unloads coil of strip automatically, and then steel coil transporting trolley drops to setting height, transports coil of strip extremely
The location of saddle support of regulation, steel coil transporting trolley bracket drops to setting height, and coil of strip is placed on the saddle.
In above procedure, for steel coil transporting trolley adjustable height measurement linear encoder and for steel coil transporting trolley
Position detection laser encoder need to be detected in real time, and using detection signal as control system input signal.Root
Lifted according to the walking and control steel coil transporting trolley bracket of input signal control steel coil transporting trolley.
Steel coil transporting trolley walking position control method and steel coil transporting trolley bracket adjustable height control are directed to separately below
Method processed is illustrated.
A：Steel coil transporting trolley walking position is controlled.Steel coil transporting trolley position is detected by laser encoder.Coil of strip
The walking and stopping control of travelling bogie are relevant with steel coil transporting trolley position.Such as steel coil transporting trolley must stop in W1 positions
Only, after holding up coil of strip, then automatic conveying coil of strip to W2 positions stops at W2 positions, unloads coil of strip, then runs to W1 positions,
Coil of strip is transported in circulation.
Steel coil transporting trolley walking position control flow is as shown in figure 1, laser encoder detection signal input data is processed
Laser encoder detection signal is converted to steel coil transporting trolley position actual value and is sent to condition by module, data processing module
Comparison module.Condition comparison module is by steel coil transporting trolley actual position value and steel coil transporting trolley positional value set in advance
It is compared and exports comparative result.As previously described, because steel coil transporting trolley position actual value there may be fluctuation, therefore meeting
The output result of condition comparison module is caused also to produce fluctuation.In order to filter the fluctuation, detection signal interference filter module is increased
Block.Detection signal interference filtering module compared result is processed, and filters the fluctuation of comparative result.
B：Steel coil transporting trolley bracket adjustable height is controlled.Steel coil transporting trolley bracket height by linear encoder detect,
The adjustable height of steel coil transporting trolley bracket is detected by linear encoder and controlled.Steel coil transporting trolley bracket adjustable height is controlled such as
Shown in Fig. 2, encoder detection signal is converted to coil of strip by encoder detection signal input data processing module, data processing module
Travelling bogie bracket height actual value is simultaneously sent to condition comparison module.Condition comparison module by steel coil transporting trolley bracket highly
Actual value is compared with steel coil transporting trolley bracket height value set in advance, and output control signal.As previously described, because
Steel coil transporting trolley bracket height actual value there may be fluctuation, therefore the control signal of condition comparison module can be caused also to produce
Fluctuation.In order to filter the fluctuation, detection signal interference filtering module is increased.Detection signal disturbs filtering module to control signal
Processed, filtered the fluctuation of control signal.
Although in above-mentioned example, what detection signal interference filtering module was filtered is the fluctuation of control signal, conduct is replaced
Generation, interference filtering module can also filter the ripple of steel coil transporting trolley physical location or steel coil transporting trolley bracket height actual value
It is dynamic, to cause the control signal for being ultimately used to control carriage walking and trolley bracket position height more stable.
In example above, signal interference filtering module can be signal lag device.
Signal lag device detects the actual value for representing physical attribute at the first moment or the physics that represents belongs to
Property actual value to storage representative physical attribute corresponding preset value comparative result after, start timer；It is additionally operable to fixed
When device expire after the second moment, the actual value for representing physical attribute detected at second moment with the first moment
The actual value for representing physical attribute for detecting is identical, or second moment detect described represent physical attribute
Comparative result of the actual value to the corresponding preset value of the representative physical attribute of storage and the generation detected at the first moment
When the actual value of table physical attribute is identical with the comparative result of the corresponding preset value of the representative physical attribute of storage, output is the
The actual value for representing physical attribute or the actual value for representing physical attribute and the generation for storing that two moment detected
The comparative result of the corresponding preset value of table physical attribute.
By taking the fluctuation for filtering control signal using signal lag device as an example, its efforts flow is as shown in Figure 3.The signal
Delayer detects control signal at the first moment（Such as high level）After start timer, after timer expiration second when
Carve and judge whether the control signal at second moment changes, if not changing, then output control signal, if control
Signal processed changes, then restart to detect control signal.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these modification or
Replace, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (4)
1. a kind of anti-interference method of detection signal, it is characterised in that including：
Step 1, detection signal is converted to the actual value for representing physical attribute；
Step 2, filters the fluctuation of the actual value for representing physical attribute or filters and represent the actual value of physical attribute and deposit
The fluctuation of the comparative result of the corresponding preset value of the representative physical attribute of storage；
Wherein, the physical attribute for steel coil transporting trolley position and/or steel coil transporting trolley bracket highly；
Wherein, the step 2 includes：
Step 21, at the first moment, detects the actual value for representing physical attribute or the reality for representing physical attribute
Actual value starts timer to after the comparative result of the corresponding preset value of the representative physical attribute of storage；
Step 22, the second moment after timer expiration, if second moment detect described represent physical attribute
Actual value it is identical with the actual value for representing physical attribute detected at the first moment, or second moment detection
To the actual value for representing physical attribute and the corresponding preset value of the representative physical attribute of storage comparative result with the
The actual value for representing physical attribute that one moment detected to storage representative physical attribute corresponding preset value comparing
Result is identical, then export the actual value for representing physical attribute that is detected at the second moment or described represent physical attribute
Actual value to storage representative physical attribute corresponding preset value comparative result.
2. anti-interference method according to claim 1, it is characterised in that in step 1, detection signal by linear encoder or
Laser encoder is exported.
3. a kind of anti-interference system of detection signal, it is characterised in that including：
Data processing module, the actual value of physical attribute is represented for detection signal to be converted to；
Detection signal disturbs filter block, and physics is represented for filtering the fluctuation of the actual value for representing physical attribute or filtering
The actual value of attribute to storage representative physical attribute corresponding preset value comparative result fluctuation；
Wherein, the physical attribute for steel coil transporting trolley position and/or steel coil transporting trolley bracket highly；
Wherein, detection signal disturbs filter block for signal lag device, and the signal lag device, for detecting institute at the first moment
State the actual value that represents physical attribute or the actual value for representing physical attribute corresponding to the representative physical attribute of storage
After the comparative result of preset value, start timer；
The second moment after timer expiration is additionally operable to, in the reality for representing physical attribute that second moment detects
Value is identical with the actual value for representing physical attribute detected at the first moment, or the institute detected at second moment
The actual value for representing physical attribute is stated to the comparative result of the corresponding preset value of the representative physical attribute of storage and at the first moment
The actual value for representing physical attribute for detecting to storage representative physical attribute corresponding preset value comparative result phase
Meanwhile, the actual value for representing physical attribute or the reality for representing physical attribute that output is detected at the second moment
It is worth the comparative result to the corresponding preset value of the representative physical attribute of storage.
4. anti-interference system as claimed in claim 3, it is characterised in that detection signal is by linear encoder or laser encoder
Output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210183752.7A CN103473920B (en) | 2012-06-06 | 2012-06-06 | Anti-interference method and system for detection signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210183752.7A CN103473920B (en) | 2012-06-06 | 2012-06-06 | Anti-interference method and system for detection signal |
Publications (2)
| Publication Number | Publication Date |
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| CN103473920A CN103473920A (en) | 2013-12-25 |
| CN103473920B true CN103473920B (en) | 2017-05-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4328588A (en) * | 1980-07-17 | 1982-05-04 | Rockwell International Corporation | Synchronization system for digital data |
| JPH0779331B2 (en) * | 1992-10-23 | 1995-08-23 | 日本電気株式会社 | Telemetry demodulator |
| CN101546187B (en) * | 2008-03-25 | 2010-12-08 | 上海宝信软件股份有限公司 | Redundant PLC system |
| CN102290874B (en) * | 2011-08-22 | 2014-04-30 | 重庆大学 | Power regulating circuit of non-contact type energy transmission system and control method thereof |
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| Title |
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| 运输链横移平台位置传感器的抗干扰优化;李鹏等;《冶金自动化》;20100522;正文1-2页 * |
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