CN101137005A - Image electronic reinforcement means and steel tube tempering furnace monitoring system - Google Patents
Image electronic reinforcement means and steel tube tempering furnace monitoring system Download PDFInfo
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Abstract
Being connected between industrial vidicon and industrial monitor, this device strengthens the contrast of video signals output by the industrial vidicon greatly. The strengthening device amplifies the contrast simultaneously, uses the amplitude limiting circuit to limit high and low amplitudes to ensure the average brightness of the video signal (VS). It maintains a steady VS line/field synchronizations and a steady average brightness of the whole picture, then outputs the strengthened VS through the output unit making the picture clearly visible. The adopted analog circuits do not have the quantified noises of the digital circuits and especially avoid the defect that there is a large proportion of quantified noises while the contrast is low in the digital circuits. It also has the advantage: less number of signal transmission/transition and low loss of signal. This analog circuit achieves optimal effect in field use, but the digital circuit is not possible.
Description
Technical field
The present invention relates to utilize industrial television that the steel in the smelting furnace are monitored, adopted electronic technology, more particularly, be meant a kind of image electronic reinforcement means and steel tube tempering furnace monitoring system thereof treatment of picture.
Background technology
At present, smelting in the production process at metallurgy, is a kind of necessary means commonly used to using the targeted surveillance in non-direct firing furnace or the tempering furnace.As in the industrial tv monitoring system of steel pipe temper, be subjected to process conditions and environmental limit can't use initiatively light illumination in the stove, used the hot gas of non-naked light to heat during the tempering heating, must rely on the luminous gray level image that just can obtain in monitored object high-temperature steel tube self heating back and carry out steel pipe heating and the image monitoring that moves.Like this, add thermoluminescence in the whole stove jointly, image steel pipe prospect of obtaining and burner hearth background reflectance and not obvious, especially much at one in the temperature of the outlet section steel pipe of stove and furnace wall, the difference of brightness between the two is very little, finally causes the image contrast that demonstrates of TV monitoring system very little.Operating personnel do not see the difference of steel pipe and background, and the tempering furnace outlet section is the crucial monitor area of producing, and steel pipe can influence the safety and the direct motion of production in the operation and heating quality of this section.By regulating the parameter of monitor, the contrast effect of correction image does not very slightly reach because of limited by process conditions the practical effect of the unconspicuous tempering furnace industry spot of gray level image contrast, sometimes can cause image blurringly on the contrary, not have supervision target.Steel pipe temper outlet section industrial television image contrast is too small to be a universal phenomenon, is a ubiquitous problem in metallurgy industry.Except tempering furnace, also there is the too small problem of image contrast to some extent in other the industrial non-direct firing furnace that does not have fill light.It has had a strong impact on adopts industry monitoring along the validity that surveillance in other smelting furnace of similar steel pipe temper is used.
Find through patent retrieval:
Number of patent application CN200410043475.5 discloses a kind of image display device and method for displaying image.It mainly is the display brightness adjusting device that is used for display interior, because the nonlinear characteristic of display module (LCD/CRT), improves the display quality and the luminous efficiency of image with this device, makes to show that output and input signal are in full accord.
Publication number CN88203436.7 discloses a kind of television image functional transformation processor, it is a kind of grey scale signal adjusting device that adopts the triode principle, can not produce the video output signals that has the accurate synchronization signal, it does not have the brightness automatic tracking circuit, when industry spot basis brightness changes, this installs cisco unity malfunction, restricted application.
Publication number CN90109109.X discloses a kind of " non-linear red, green, blue vision signal is handled ", it is the non-linear adjustment circuit that a kind of commercial television signal is used, low frequency signal is not adjusted, high-frequency signal is amplified, it can only be adjusted the contrast of local detail, can not carry out processing and amplifying to the contrast of entire image.
The disclosed name of U.S. Patent Publication No. US5051821A is called " Low light level colorimage television system including electronic contrast enhancementsystem ".It mainly relies on the principle of optics to detect and strengthens.
The disclosed name of U.S. Patent Publication No. US6771320 is called " Contrast enhancementapparatus of video signal ", then is that a kind of logarithm is non-linear, and is the relevant treatment technology of frequency.
The disclosed name of european patent number EP1397008 is called " Adaptive contrast andbrightness enhancement with color preservation ", then be the circuit that is used for carrying out matching optimization with display module (TFT/CRT) characteristic, irrelevant with the technology used in the present invention.
Publication number CN98103624.4 discloses a kind of " histogram equalization method and parts in the image processing system contrast expansion equipment ", it is the technology that has adopted Digital Image Processing, under the very low situation of the contrast that digital circuit exists, the shortcoming that the ratio that quantizing noise accounts for is also very big, and the transmission of tool signal is many with transform part.
Summary of the invention
The objective of the invention is at above-mentioned in the industrial tv monitoring system of steel pipe temper, exist because of the steel pipe image object that obtains can't be with burner hearth background reflectance and not obvious causing thereof to the shortcoming of heating of the high-temperature steel tube in the tempering furnace and the image monitoring that moves, provide a kind of line construction simple, can carry out the enlarged image electronic enhancement equipment to the contrast of image, and the steel tube tempering furnace monitoring system that can effectively monitor to the image in the steel pipe temper.
To achieve these goals, the present invention adopts following technical scheme:
As first scheme, image electronic reinforcement means of the present invention,
Comprise:
Input unit to the processing of carrying out noise reduction from the vision signal of industrial camera and improving signal to noise ratio, and is sent to the back level with output signal;
Image signal processing unit receives the vision signal of input unit through noise reduction process, and this vision signal is carried out Synchronous Processing and effective video signal and synchronizing signal made up the vision signal after formation strengthens;
Luminance signal processing unit, to video synchronization signal, image useful signal and video signal carry out that the picture mean flow rate is handled and to the contrast of image amplify, amplitude limit, and send into image signal processing unit;
Output unit, the vision signal after the enhancing of reception image signal processing unit output, and eliminate noise once more, and vision signal is after treatment sent into follow-up monitor.
Described input unit further comprises input matching circuit, input filter circuit, input matching circuit carries out impedance matching to the vision signal that the video camera that receives is exported, and deliver in the input filter circuit, the vision signal of eliminating high-frequency interferencing signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
Described input unit also comprises zero adjustment circuit, zero adjustment circuit is to mating through input and stable reference level of input Filtering Processing rear video signal sets, and this output signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
Described image signal processing unit further comprises video synchronization signal detection circuit, image useful signal testing circuit, strengthens vision signal and synchronizing signal combinational circuit, whether the picture signal that video synchronization signal detection circuit is exported input unit is in synchronously capable and the field synchronization stage is detected, and video synchronization signal is divided into two-way output, one the tunnel delivers to image useful signal testing circuit, and another road is delivered to the mean flow rate testing circuit and strengthened vision signal and synchronizing signal combinational circuit; Image useful signal testing circuit also has two-way output, and one the tunnel delivers to the mean flow rate testing circuit of signal processing unit, and another road is delivered to and strengthened vision signal and synchronizing signal combinational circuit.
Described luminance signal processing unit further comprises mean flow rate testing circuit, contrast amplifying circuit, high amplitude limit and low clip circuit, the mean flow rate testing circuit receives the output image vision signal of the image useful signal testing circuit of the REF video output signal of input unit output and image signal processing unit, and output signal is delivered to the contrast amplifying circuit; The contrast amplifying circuit also receives the REF video output signal of the zero adjustment circuit output of input unit; High amplitude limit and low clip circuit receive the output signal of contrast amplifying circuit, and the output signal behind the amplitude limit is delivered to image signal processing unit.
Described output unit further comprises output filter circuit and output matching circuit, and output filter circuit receives the vision signal after image signal processing unit output strengthens, and carries out delivering to output matching circuit after the filtering; Output matching circuit carries out filtered vision signal to export after the impedance matching again.
As another program of the present invention,
This steel tube tempering furnace monitoring system comprises industrial camera, industry monitoring device, also is connected to image electronic reinforcement means between industrial camera and industry monitoring device, and image electronic reinforcement means comprises:
Input unit to the processing of carrying out noise reduction from the vision signal of industrial camera and improving signal to noise ratio, and is sent to the back level with output signal;
Image signal processing unit receives the vision signal of input unit through noise reduction process, and this vision signal is carried out Synchronous Processing and effective video signal and synchronizing signal made up the vision signal after formation strengthens;
Luminance signal processing unit, to video synchronization signal, image useful signal and video signal carry out that the picture mean flow rate is handled and to the contrast of image amplify, amplitude limit, and send into image signal processing unit;
Output unit, the vision signal after the enhancing of reception image signal processing unit output, and eliminate noise once more, and vision signal is after treatment sent into follow-up monitor.
Described input unit further comprises input matching circuit, input filter circuit, input matching circuit carries out impedance matching to the vision signal that the video camera that receives is exported, and deliver in the input filter circuit, the vision signal of eliminating high-frequency interferencing signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
Described input unit also comprises zero adjustment circuit, zero adjustment circuit is to mating through input and stable reference level output signal of input Filtering Processing rear video signal sets, and this output signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
Described image signal processing unit further comprises video synchronization signal detection circuit, image useful signal testing circuit, strengthens vision signal and synchronizing signal combinational circuit, whether the picture signal that video synchronization signal detection circuit is exported input unit is in synchronously capable and the field synchronization stage is detected, and video synchronization signal is divided into two-way output, one the tunnel delivers to image useful signal testing circuit, and another road is delivered to the mean flow rate testing circuit and strengthened vision signal and synchronizing signal combinational circuit; Image useful signal testing circuit also has two-way output, and one the tunnel delivers to the mean flow rate testing circuit of signal processing unit, and another road is delivered to and strengthened vision signal and synchronizing signal combinational circuit.
Described luminance signal processing unit further comprises mean flow rate testing circuit, contrast amplifying circuit, high amplitude limit and low clip circuit, the mean flow rate testing circuit receives the output image vision signal of the image useful signal testing circuit of the REF video output signal of input unit output and image signal processing unit, and output signal is delivered to the contrast amplifying circuit; The contrast amplifying circuit also receives the REF video output signal of the zero adjustment circuit output of input unit; High amplitude limit and low clip circuit receive the output signal of contrast amplifying circuit, and the output signal behind the amplitude limit is delivered to image signal processing unit.
Described output unit further comprises output filter circuit and output matching circuit, and output filter circuit receives the vision signal after image signal processing unit output strengthens, and carries out delivering to output matching circuit after the filtering; Output matching circuit carries out filtered vision signal to export after the impedance matching again.
In above-mentioned first technical scheme of the present invention, carrying out targetedly significantly to the vision signal of industrial camera output, contrast strengthens, it is when amplifying contrast, utilize amplitude limiter circuit to carry out high amplitude limit and low clip processing, the assurance vision signal can not crossed bright or black excessively, keep simultaneously in the vision signal row synchronously, field sync signal do not change, keep the mean flow rate of full width image constant, and then the output of the video signal after will strengthening by output unit, make clear picture as seen; And the employing of analog circuit does not have the quantizing noise of digital circuit, under the very low situation of the contrast of having avoided digital circuit to exist, the shortcoming that the ratio that quantizing noise accounts for is also very big, and tool signal transmission is few with transform part, and the advantage that the loss of signal is smaller has reached the optimum efficiency of on-the-spot use.
And in second technical scheme of the present invention, only above-mentioned image electronic reinforcement means is connected between worker's industrial camera and the industry monitoring device, make the industrial tv monitoring system of original steel pipe temper needn't do any change, increase a low-cost image electronic reinforcement means simply, can be with original serious industry monitoring image of watching that hinders, clear being fit to that become, watched, whole proposal is simple, volume is little, low in energy consumption, cost is low, is applicable to on-the-spot adverse circumstances, has reached each generic request of industry spot image monitoring.
Description of drawings
Fig. 1 is image electronic reinforcement means of the present invention and steel tube tempering furnace monitoring system square frame principle schematic diagram thereof.
Fig. 2 is an image electronic reinforcement means circuit theory schematic diagram of the present invention.
Fig. 3 is the work schedule schematic diagram of circuit of the present invention.
Fig. 4 is original image gray-scale statistical distribution histogram (video camera output).
Fig. 5 is through the gradation of image Distribution Statistics histogram behind the electronic enhancement equipment of the present invention.
Embodiment
See also shown in Figure 1, image electronic reinforcement means of the present invention,
Comprise:
Image signal processing unit 20 receives the vision signal of input unit 10 through noise reduction process, and this vision signal is carried out Synchronous Processing and effective video signal and synchronizing signal made up the vision signal after formation strengthens.
Luminance signal processing unit 30, to video synchronization signal, image useful signal and video signal carry out that the picture mean flow rate is handled and to the contrast of image amplify, amplitude limit, and send into image signal processing unit 20.
Output unit 40, the vision signal after the enhancing of reception image signal processing unit 20 outputs, and eliminate noise once more, and vision signal is after treatment sent into follow-up monitor.
Described input unit 10 further comprises input matching circuit 11, input filter circuit 12, the vision signal of 11 pairs of video cameras that receive of input matching circuit, 60 outputs is carried out impedance matching, and deliver in the input filter circuit 12, the vision signal of eliminating high-frequency interferencing signal is delivered to the image signal processing unit 20 and the luminance signal processing unit 30 of back level.
Described input unit 10 also comprises zero adjustment circuit 13, zero adjustment circuit 13 pairs of process inputs coupling and stable REF video output signal of input Filtering Processing rear video signal sets, the image signal processing unit 20 and the luminance signal processing unit 30 of level after this output signal.Zero-point voltage is precise and stable, helps next step this vision signal is carried out comparing accurately and amplifying.
Described image signal processing unit 20 further comprises video synchronization signal detection circuit 21, image useful signal testing circuit 22, strengthen vision signal and synchronizing signal combinational circuit 23, whether the picture signal of 22 pairs of input units of video synchronization signal detection circuit, 10 outputs is in synchronously capable and the field synchronization stage is detected, and video synchronization signal is divided into two-way output, one the tunnel delivers to image useful signal testing circuit 22, and the enhancing vision signal and the synchronizing signal combinational circuit 23 of luminance signal processing unit 30 mean flow rate testing circuits 31 and image signal processing unit 20 delivered on another road; Image useful signal testing circuit 22 also has two-way output, and one the tunnel delivers to the mean flow rate testing circuit 31 of signal processing unit, and another road is delivered to and strengthened vision signal and synchronizing signal combinational circuit 23.
Described luminance signal processing unit 30 further comprises mean flow rate testing circuit 31, contrast amplifying circuit 32, high amplitude limit and low clip circuit 33, mean flow rate testing circuit 31 receives the output image vision signal of the image useful signal testing circuit 22 of the REF video output signal of zero adjustment circuit 13 outputs of input units 10 and image signal processing unit 20, and output signal is delivered to contrast amplifying circuit 32; Contrast amplifying circuit 32 also receives the REF video output signal of zero adjustment circuit 13 outputs of input unit 10; High amplitude limit and low clip circuit 33 receive the output signal of contrast amplifying circuit 32, and the output signal behind the amplitude limit is delivered to image signal processing unit.
Described output unit 40 further comprises output filter circuit 41 and output matching circuit 42, and output filter circuit 41 receives the vision signal after image signal processing unit 20 outputs strengthen, and carries out delivering to output matching circuit 41 after the filtering; Output matching circuit 41 carries out filtered vision signal to export after the impedance matching again.
As another program of the present invention, please still consult shown in Figure 1,
This steel tube tempering furnace monitoring system, comprise industrial camera 60, industry monitoring device 70, make a video recording in 60 pairs of industrial heating furnaces 50 of industrial camera, video camera 60 outputting video signals are delivered to the back one-level, between industrial camera 60 and industry monitoring device 70, also be connected to image electronic reinforcement means 100, in an embodiment of the present invention, vision signal is to deliver in the image electronic reinforcement means 100, and in traditional steel tube tempering furnace monitoring system, vision signal is directly to deliver in the industry monitoring device 70, and image electronic reinforcement means 100 comprises:
Image signal processing unit 20 receives the vision signal of input unit 10 through noise reduction process, and this vision signal is carried out Synchronous Processing and effective video signal and synchronizing signal made up the vision signal after formation strengthens.
Luminance signal processing unit 30, to video synchronization signal, image useful signal and video signal carry out that the picture mean flow rate is handled and to the contrast of image amplify, amplitude limit, and send into image signal processing unit 20.
In the luminance signal processing unit 30 of two above-mentioned schemes, contrast amplifying circuit 32 re-uses the average brightness value of mean flow rate testing circuit 31 result of calculations and picture as center reference, contrast to image is amplified, the mean flow rate that when amplifying contrast, keeps picture with handle before consistent basically, the brightness range that keeps the entire image observation is in eyes can the scope of comfortable observation.Because the video voltage characteristic range is Vpp=0～1V, wherein synchronizing signal has been used 0～0.3V, picture signal is 0.3～1V, contrast may cause local voltage too high (〉 1V when amplifying) and low excessively (＜0.3V), the too high stability that can influence image is crossed the synchronous of low meeting interfering picture.So, on circuit, taked the high amplitude limit and the low clip circuit 33 of gray value to the amplification image, may transfinite to voltage after amplifying with inhibition, cause unsettled jitter phenomenons such as image stroboscopic.When contrast strengthens, synchronizing signal is also amplified significantly, can not be as normal synchronous control signal, so need to use enhancing vision signal and synchronizing signal combinational circuit 23, the synchronizing signal of from undressed primary signal, extracting, through extracting picture signal in the signal that strengthens, the combination back produces new complete, available, effective video signal again.
Output unit 40, the vision signal after the enhancing of reception image signal processing unit 20 outputs, and eliminate noise once more, and vision signal is after treatment sent into follow-up monitor.
Identical about describing in the concrete structure of input unit 10, image signal processing unit 20, luminance signal processing unit 30, output unit 40 and aforementioned first scheme, this just no longer tired chatting.
When the surveillance of this programme is installed, keep former installed device motionless, only with after the disconnection of the vision cable between industrial camera 60 and the industry monitoring device 70, with the serial connection mode increase by first scheme electronic image enhancement process device 100 get final product.
The detailed principle of image electronic reinforcement means 100 of the present invention please is described as follows in conjunction with Fig. 2 again:,
Input matching circuit 11 comprises build-out resistor R16, sets resistance R 17 at capacitance C11 and zero point.R16 is used for the impedance on the terminated line, and capacitance C11 is used for the isolated DC component.Resistance R 17 provides a new zero point for vision signal V1.Obtain incoming video signal V0 through handling.
Zero point, initialization circuit 13, capacitor C 14 and diode D3.The input of AC coupled video is difficult to handle than the video input of adopting direct-current coupling, and this is because the average signal voltage of video waveform has been subjected to the influence of picture material, so the black level at amplifier place can drift about along with the variation of scene brightness.In TSC-system formula and pal mode video system, the voltage difference between peak signal voltage and the black level is about 700mV, therefore can make entire circuit be operated in stable status for vision signal V1 sets a new stable reference level.
Image signal processing unit 20
Video synchronization signal detection circuit 21: comprise potentiometer W1, comparator U1 and pull-up resistor R1.The effect of this circuit is to determine whether vision signal is in synchronous regime.Potentiometer W1 provides a normal voltage, and through filtered vision signal, the voltage given with potentiometer W1 compares.When vision signal was lower than the 0.3V of reference level, the synchronous indicating signal HS signal of comparator U1 output was a low level, and when vision signal was higher than the 0.3V of standard, synchronous indicating signal HS was a high level.Concrete sequential is referring to shown in Figure 3, and this signal is used for system's control.
Image useful signal testing circuit 22 comprises 2 monostable trigger U2, U3 and capacitor C 1, C2 and resistance R 2, R3, and the main effect of this circuit is to utilize the synchronous indicating signal conversion to obtain image useful signal PicEn.The time constant that capacitor C 1 and resistance R 2 are regulated trigger U2, the time constant that capacitor C 2 and resistance R 3 are regulated U3.Sequential relationship is seen Fig. 3.When vision signal V1 enters synchronous regime, synchronous indicating signal HS is a trailing edge, this trailing edge triggers the 1st monostable trigger U2 and produces delay pulse, the pulse of the video useful signal PicEn of the 2nd monostable trigger U3 of this delay pulse end trigger, the length of the commutator pulse PicEn of the 2nd monostable trigger are every effective time of capable image.Image is effective when PicEn is high level, and when PicEn was low level, vision signal was synchronous or state of a control, and image is invalid.
Luminance signal processing unit 30
Mean flow rate testing circuit 31 comprises diverter switch U4, capacitance-resistance filter R4, C3, drives operational amplifier U5 and filter capacitor C4.Diverter switch U4 works under the control of synchronous indicating signal HS and image useful signal PicEn, when image effectively and when being in asynchronous regime, diverter switch U4 connects vision signal V1, when invalid or device is in synchronizing cycle when image, switch U4 turn-offs, have only effective picture signal to be sent among capacitance-resistance filter C3 and the R4 like this, synchronizing signal and control signal are cut off.Through the buffering of filtering and amplifier U5, just obtain the mean flow rate PicAV of image.
The selection of the time constant R4*C3 of this circuit should be 40ms greater than the time of 1 width of cloth image, otherwise image can shake, and it also is less than the minimal reaction time, is generally 1 second, otherwise can be very blunt.
Contrast amplifying circuit 32 and high amplitude limit and low clip circuit 33 comprise resistance R 5, R6, R7, R8, R9, R10, R11, capacitor C 5, C6, potentiometer W2, W3, toggle switch SW1, diode D1, D2 and video amplifier U6.
Video amplifier U6 plays the amplification of core, R6, W2 and C5 constitute zero adjustment circuit, can adjust the mean flow rate of image by the variation of W2, R5 is that loading resistor is loaded into vision signal in the amplifier, C6 strobes, because frequency video signal is less than 5.8MHz, so time constant T=C6*R5 can be set in below the 0.18us.
R7 and R9, R10, R11, W3 have constituted feedback oscillator and have adjusted network, and toggle switch SW1 can combination in any, selects then suitable gain.When feedback resistance is selected R9, gain:
When feedback resistance is selected R10, gain:
。Other and the like.Feedback resistance can be selected one of them, also can be several combinations, and corresponding gain can be finely tuned.
Resistance R 8 plays the effect of output buffering.Diode D1 connects high limiting voltage Vhigh_lim, and conducting when overtension reduces output voltage, and diode D2 connects low clip voltage Vlow_lim, and conducting when brownout improves output voltage.
This circuit obtains the vision signal V2 through the contrast processing at last.
The enhancing vision signal of image signal processing unit 20 and the principle of synchronizing signal combinational circuit 23 are described at last, because video amplifier U6 has also carried out amplification and amplitude limit with synchronizing signal, so the synchronizing signal among the vision signal V2 is destroyed, need recover again with strengthening vision signal and synchronizing signal combinational circuit, this circuit 23 comprises multi-channel switch U7, and sequential relationship is seen Fig. 3.When image effectively and signal when not being in synchronous regime, switch U7 connects through the vision signal V2 that amplifies, when image be synchronous or during state of a control, the U7 switch connection does not have treated signal V1, therefrom intercepting reaches control signal synchronously, obtains regular vision signal V3.
Output unit 40
Output filter circuit 41 and output matching circuit 42,
Output filter circuit 41 adopts active power filtering, and active filter can drive vision cable.
Output matching circuit 41 adopts conventional capacitance-resistance coupling to get final product.From the vision signal V4 of output filter, through coupling resistance R 13, capacitance C8 can drive vision cable.Usually resistance R 13 is 75 ohm.Because amplifier must drive a low-impedance relatively transmission line, so output capacitance C8 just can not be so little as input capacitance C11.By 50 or the signal of 60Hz just need a big output capacitance greater than 100 μ F, 100 μ F are the balance points between a physical size and the cost.In Fig. 3, transmission line is the rear end coupling, and output capacitance is 150 Ω at the effective resistance of input like this.Just need 220 μ F (f0=9.6Hz) or higher Low ESR output capacitance by the 60Hz vertical synchronizing signal.
Through the processing of foregoing circuit, select suitable multiplication factor, just can original contrast is very low, the image of almost can't see becomes and is perfectly clear.After will having used apparatus of the present invention, the image of forward and backward collection, and carried out the analysis of gray-scale statistical histogram gradation of image distribution statistics, the result as shown in Figure 4 and Figure 5, contrast has increased about 5 times.The test of carrying out in the laboratory, contrast are increased to about 2 times.
Practical operation situation and analysis of experimental data from the scene, by intensifier provided by the present invention, can be under the very little situation of image contrast, the low-cost contrast that strengthens image significantly, satisfy industry monitoring device image result of use, make monitoring picture reach operating personnel and can monitor steel pipe temper effectively, especially the tempering furnace outlet section is monitored, the production safety direct motion can be protected.
Claims (12)
1. an image electronic reinforcement means is used for the Video signal processing to industrial camera output, it is characterized in that,
Comprise:
Input unit to the processing of carrying out noise reduction from the vision signal of industrial camera and improving signal to noise ratio, and is sent to the back level with output signal;
Image signal processing unit receives the vision signal of input unit through noise reduction process, and this vision signal is carried out Synchronous Processing and effective video signal and synchronizing signal made up the vision signal after formation strengthens;
Luminance signal processing unit, to video synchronization signal, image useful signal and video signal carry out that the picture mean flow rate is handled and to the contrast of image amplify, amplitude limit, and send into image signal processing unit;
Output unit, the vision signal after the enhancing of reception image signal processing unit output, and eliminate noise once more, and vision signal is after treatment sent into follow-up monitor.
2. image electronic reinforcement means as claimed in claim 1,
It is characterized in that,
Described input unit further comprises input matching circuit, input filter circuit, input matching circuit carries out impedance matching to the vision signal that the video camera that receives is exported, and deliver in the input filter circuit, the vision signal of eliminating high-frequency interferencing signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
3. image electronic reinforcement means as claimed in claim 2,
It is characterized in that,
Described input unit also comprises zero adjustment circuit, zero adjustment circuit is to mating through input and stable reference level of input Filtering Processing rear video signal sets, and this output signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
4. image electronic reinforcement means as claimed in claim 1,
It is characterized in that,
Described image signal processing unit further comprises video synchronization signal detection circuit, image useful signal testing circuit, strengthens vision signal and synchronizing signal combinational circuit, whether the picture signal that video synchronization signal detection circuit is exported input unit is in synchronously capable and the field synchronization stage is detected, and video synchronization signal is divided into two-way output, one the tunnel delivers to image useful signal testing circuit, and another road is delivered to the mean flow rate testing circuit and strengthened vision signal and synchronizing signal combinational circuit; Image useful signal testing circuit also has two-way output, and one the tunnel delivers to the mean flow rate testing circuit of signal processing unit, and another road is delivered to and strengthened vision signal and synchronizing signal combinational circuit.
5. image electronic reinforcement means as claimed in claim 1,
It is characterized in that,
Described luminance signal processing unit further comprises mean flow rate testing circuit, contrast amplifying circuit, high amplitude limit and low clip circuit, the mean flow rate testing circuit receives the output image vision signal of the image useful signal testing circuit of the REF video output signal of input unit output and image signal processing unit, and output signal is delivered to the contrast amplifying circuit; The contrast amplifying circuit also receives the REF video output signal of the zero adjustment circuit output of input unit; High amplitude limit and low clip circuit receive the output signal of contrast amplifying circuit, and the output signal behind the amplitude limit is delivered to image signal processing unit.
6., image electronic reinforcement means as claimed in claim 1,
It is characterized in that,
Described output unit further comprises output filter circuit and output matching circuit, and output filter circuit receives the vision signal after image signal processing unit output strengthens, and carries out delivering to output matching circuit after the filtering; Output matching circuit carries out filtered vision signal to export after the impedance matching again.
7. a steel tube tempering furnace monitoring system comprises industrial camera, industry monitoring device, it is characterized in that, also is connected to image electronic reinforcement means between industrial camera and industry monitoring device, and image electronic reinforcement means comprises:
Input unit to the processing of carrying out noise reduction from the vision signal of industrial camera and improving signal to noise ratio, and is sent to the back level with output signal;
Image signal processing unit receives the vision signal of input unit through noise reduction process, and this vision signal is carried out Synchronous Processing and effective video signal and synchronizing signal made up the vision signal after formation strengthens;
Luminance signal processing unit, to video synchronization signal, image useful signal and video signal carry out that the picture mean flow rate is handled and to the contrast of image amplify, amplitude limit, and send into image signal processing unit;
Output unit, the vision signal after the enhancing of reception image signal processing unit output, and eliminate noise once more, and vision signal is after treatment sent into follow-up monitor.
8. steel tube tempering furnace monitoring system as claimed in claim 6,
It is characterized in that,
Described input unit further comprises input matching circuit, input filter circuit, input matching circuit carries out impedance matching to the vision signal that the video camera that receives is exported, and deliver in the input filter circuit, the vision signal of eliminating high-frequency interferencing signal is delivered to the image signal processing unit and the luminance signal processing unit of back level.
9. as claim 8 steel tube tempering furnace monitoring system,
It is characterized in that,
Described input unit also comprises zero adjustment circuit, zero adjustment circuit is to mating and stable reference level output signal of input Filtering Processing rear video signal sets the image signal processing unit and the luminance signal processing unit of level after this output signal through input.
10. as claim 7 steel tube tempering furnace monitoring system,
It is characterized in that,
Described image signal processing unit further comprises video synchronization signal detection circuit, image useful signal testing circuit, strengthens vision signal and synchronizing signal combinational circuit, whether the picture signal that video synchronization signal detection circuit is exported input unit is in synchronously capable and the field synchronization stage is detected, and video synchronization signal is divided into two-way output, one the tunnel delivers to image useful signal testing circuit, and another road is delivered to the mean flow rate testing circuit and strengthened vision signal and synchronizing signal combinational circuit; Image useful signal testing circuit also has two-way output, and one the tunnel delivers to the mean flow rate testing circuit of signal processing unit, and another road is delivered to and strengthened vision signal and synchronizing signal combinational circuit.
11. as steel tube tempering furnace monitoring system as described in the claim 7,
It is characterized in that,
Described luminance signal processing unit further comprises mean flow rate testing circuit, contrast amplifying circuit, high amplitude limit and low clip circuit, the mean flow rate testing circuit receives the output image vision signal of the image useful signal testing circuit of the REF video output signal of input unit output and image signal processing unit, and output signal is delivered to the contrast amplifying circuit; The contrast amplifying circuit also receives the REF video output signal of the zero adjustment circuit output of input unit; High amplitude limit and low clip circuit receive the output signal of contrast amplifying circuit, and the output signal behind the amplitude limit is delivered to image signal processing unit.
12., steel tube tempering furnace monitoring system as claimed in claim 7,
It is characterized in that,
Described output unit further comprises output filter circuit and output matching circuit, and output filter circuit receives the vision signal after image signal processing unit output strengthens, and carries out delivering to output matching circuit after the filtering; Output matching circuit carries out filtered vision signal to export after the impedance matching again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100307034A CN100536528C (en) | 2006-08-31 | 2006-08-31 | Image electronic reinforcement means and steel tube tempering furnace monitoring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152514A (en) * | 2013-03-18 | 2013-06-12 | 成都龙腾中远信息技术有限公司 | Video signal enhancer |
| CN107071229A (en) * | 2017-03-24 | 2017-08-18 | 成都云材智慧数据科技有限公司 | A kind of picture signal converting system based on low-pass filtering treatment |
| CN109743474A (en) * | 2019-03-18 | 2019-05-10 | 延锋伟世通电子科技（上海）有限公司 | A kind of single-ended camera signals processing circuit of highly resistance immunity |
| CN112214618A (en) * | 2020-10-27 | 2021-01-12 | 泰州无印广告传媒有限公司 | Beverage manufacturing system based on big data storage |
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- 2006-08-31 CN CNB2006100307034A patent/CN100536528C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152514A (en) * | 2013-03-18 | 2013-06-12 | 成都龙腾中远信息技术有限公司 | Video signal enhancer |
| CN107071229A (en) * | 2017-03-24 | 2017-08-18 | 成都云材智慧数据科技有限公司 | A kind of picture signal converting system based on low-pass filtering treatment |
| CN107071229B (en) * | 2017-03-24 | 2023-10-03 | 成都云材智慧数据科技有限公司 | Image signal conversion system based on low-pass filtering processing |
| CN109743474A (en) * | 2019-03-18 | 2019-05-10 | 延锋伟世通电子科技（上海）有限公司 | A kind of single-ended camera signals processing circuit of highly resistance immunity |
| CN109743474B (en) * | 2019-03-18 | 2023-04-25 | 延锋伟世通电子科技（上海）有限公司 | High-noise-immunity single-ended camera signal processing circuit |
| CN112214618A (en) * | 2020-10-27 | 2021-01-12 | 泰州无印广告传媒有限公司 | Beverage manufacturing system based on big data storage |
| CN112214618B (en) * | 2020-10-27 | 2021-05-28 | 海南莲颂生物科技有限公司 | Beverage manufacturing system based on big data storage |
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