CN208707830U - A kind of analog video signal interference detecting apparatus - Google Patents
A kind of analog video signal interference detecting apparatus Download PDFInfo
- Publication number
- CN208707830U CN208707830U CN201821385258.8U CN201821385258U CN208707830U CN 208707830 U CN208707830 U CN 208707830U CN 201821385258 U CN201821385258 U CN 201821385258U CN 208707830 U CN208707830 U CN 208707830U
- Authority
- CN
- China
- Prior art keywords
- video signal
- analog video
- signal
- circuit
- interference
- 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.)
- Expired - Fee Related
Links
- 238000004088 simulation Methods 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 19
- 238000005070 sampling Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 239000000284 extract Substances 0.000 description 4
- 238000013139 quantization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003709 image segmentation Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Studio Devices (AREA)
Abstract
The utility model relates to analog video signal detection technique fields, a kind of analog video signal interference detecting apparatus is disclosed, the device includes: coaxial cable and interference detector module, and the interference detector module is electrically connected by the coaxial cable with simulation camera module；The simulation camera module has the signal processing circuit of masked areas function, the analog video signal that the interference detector module is used to export masked areas function signal processing circuit detects, above-mentioned technical proposal realizes the Interference Detection of analog video signal, its accuracy in detection is high, structure is simple, cost is relatively low, can be widely applied in simulation camera signals acquisition system.
Description
Technical field
The utility model relates to analog video signal detection technique field more particularly to a kind of interference inspections of analog video signal
Survey device.
Background technique
Analog video signal is a kind of low voltage difference (type signal voltage peak-to-peak value 1V), high bandwidth (MHz of several MHz~tens)
Baseband signal.During base-band video signal trans-receive, it is frequently present of the earth loop interference of various interference, especially 50Hz, is caused
Phenomena such as video image distortion, shake, color distortion, hidden danger is brought to subsequent signal processing.
In the prior art, interference inspection is carried out to vision signal from software algorithm level frequently with frame-to-frame differences method and background subtraction
It surveys, computationally intensive, arithmetic speed is slower, and algorithm comparison is complicated, higher operating costs.
Utility model content
The utility model embodiment is designed to provide a kind of analog video signal interference detecting apparatus, can be to video
The interference signal occurred in signals transmission is detected, and accuracy in detection is high, and structure is simple, and cost is relatively low, Ke Yi
It is widely applied in simulation camera signals acquisition system.
In order to achieve the above object, the utility model uses following technical scheme:
A kind of analog video signal interference detecting apparatus comprising: coaxial cable and interference detector module；
The interference detector module is electrically connected by the coaxial cable with simulation camera module；
The simulation camera module has the signal processing circuit of masked areas function, and the interference detector module is used
It is detected in the analog video signal exported to masked areas function signal processing circuit.
Further, the simulation camera module includes ccd sensor circuit, the ccd sensor circuit with it is described
Signal processing circuit electrical connection；
The ccd sensor circuit exports the described image signal of acquisition to the letter for acquiring picture signal
Number processing circuit；
The signal processing circuit is for handling described image signal and being converted to analog video signal.
Further, the interference detector module include video signal distribution circuit, vision signal A/D conversion circuit and
Measurement processor；
The video signal distribution circuit includes input terminal, the first output end and second output terminal, the vision signal point
Input terminal with circuit is electrically connected with the coaxial cable, and the analog video signal for transmitting the coaxial cable is divided into
Analog video signal and the second road analog video signal all the way, the first via analog video signal and second tunnel simulation view
Frequency signal is exported from the first output end and second output terminal of the video signal distribution circuit respectively；
The vision signal A/D conversion circuit is electrically connected with the second output terminal of the video signal distribution circuit, is used for
Second road analog video signal is converted into digital video signal；
The measurement processor is electrically connected with the vision signal A/D conversion circuit, for detecting the digital video letter
Number characteristics of image, determine whether signal is disturbed.
Further, the first output end of the video signal distribution circuit is electrically connected with video reception apparatus, the view
Frequency signal distribution circuit is also used to export first via analog video signal to the video reception apparatus.
Further, the simulation camera module further includes power module, and the power module is used for as simulation camera shooting
The circuit of head module provides power supply.
Further, described device further includes alarm module, and the alarm module is electrically connected with the interference detector module
It connects.
The utility model has the following beneficial effects: a kind of analog video signal interference detecting apparatus provided, Interference Detection
Device module carries out branch, conversion by analog video signal of the coaxial cable to simulation camera module output, by analog video
Signal is converted to digital video signal, and detects to digital video signal, realizes the Interference Detection of analog video signal,
Its accuracy in detection is high, and structure is simple, and cost is relatively low, can be widely applied in simulation camera signals acquisition system.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of analog video signal interference detecting apparatus provided by the embodiment of the utility model.
Fig. 2 is the structural representation of another analog video signal interference detecting apparatus provided by the embodiment of the utility model
Figure.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.In addition it should be noted that
, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of analog video signal interference detecting apparatus provided by the embodiment of the utility model,
Referring to Fig. 1, present embodiment provides a kind of analog video signal interference detecting apparatus, which includes coaxial cable 2 and interference
Detector module 3, interference detector module 3 are electrically connected by coaxial cable 2 with simulation camera module 1, and camera mould is simulated
Block 1 has the signal processing circuit of masked areas function, and interference detector module 3 is used for masked areas function signal processing electricity
The analog video signal of road output is detected.
Multiple specific color lumps are generated specifically, can be arranged by software with the simulation camera that video covers function
Specified image-region is blocked, above-mentioned characteristic is based on, pre-set image, masked areas are set in simulation camera module 1
The picture signal that function signal processing circuit acquires simulation camera module 1 is handled, and pre-set image is added and is acquired
Picture signal its pre-set image region is blocked, then, masked areas function signal processing circuit will be treated
Picture signal is converted to standard analog video signal output, and the standard analog video signal of output is transferred to by coaxial cable 2
Interference detector module 3.Under normal circumstances, because of the covering of pre-set image, the analog video signal that camera module 1 exports is simulated
In each frame image specific region pre-set image be it is constant, the pre-set image after digitlization is characterized in stable；Work as mould
When quasi- vision signal is interfered, the pre-set image of addition will be destroyed, digitlization after pre-set image feature with just
It is different in normal situation.The standard analog video signal of 3 pairs of interference detector module inputs is handled, and is extracted therein
The feature of pre-set image, and the characteristics of image of extraction is detected.
Illustratively, pre-set image is set in simulation camera module 1, which can be bar code, two dimensional code, can
To be the regular figures such as circle, rectangle or other figures, specific limit is not done to the concrete shape of the image, color, size etc.
Fixed, for example, generating pre-set image in simulation camera module 1 is bar code, masked areas function signal processing circuit is in mould
Bar code image data are added in the multiple image data of quasi- 1 acquired image signal of camera module, while bar shaped is set
The position of code, for example, can be in the high bar code of lower-left method, edge setting wide * 5 pixel of one 256 pixel of acquisition image to just
Normal image is covered, and the picture signal after bar code image is added is converted to standard by masked areas function signal processing circuit
Analog video signal is transmitted to interference detector module 3, the analog video that simulation camera module 1 exports by coaxial cable 2
Signal is converted to digital video signal after the processing of interference detector module 3, i.e. analog image is converted into Finite Number number of words
It is worth the two dimensional image that pixel indicates.Under normal circumstances, using software algorithm, such as use thresholding method by digital video signal
In pre-set image split, the feature of bar code image after digitlization is extracted and using the feature of extraction as default
Characteristic value, this feature can be color characteristic, textural characteristics, the shape feature etc. of image, while the feature goodness of fit is arranged, and such as set
Setting the feature goodness of fit is 85%.Compared to traditional Interference Detection, Interference Detection can be realized by simple software algorithm, detect
Accuracy is high, and structure is simple, and cost is relatively low.
When video image acquisition starts, when interference detector module 3 detects the feature of bar code image to be detected and pre-
If the feature goodness of fit of characteristic value is more than or equal to 85%, then it is assumed that the analog video signal that simulation camera module 1 acquires does not have
It is interfered；Otherwise it is assumed that being interfered.
To sum up, in the present embodiment, interference detector module 3 is converted to the analog video signal that coaxial cable 2 transmits
Digital video signal is extracted default in digital video signal by being split to digital video signal under normal circumstances
The feature of image and as default characteristic value, while the feature goodness of fit is set, after video acquisition starts, by comparing to
The feature of the pre-set image in digital video signal and the feature goodness of fit of default characteristic value are detected, is realized to analog video signal
Interference Detection, accuracy in detection is high, and structure is simple, and cost is relatively low, can be wide in simulation camera signals acquisition system
General application.
Fig. 2 is the structural representation of another analog video signal interference detecting apparatus provided by the embodiment of the utility model
Figure.The present embodiment is established on the basis of the above embodiments, as shown in Figure 2.The detail content of not detailed description in the present embodiment,
It can refer to above-described embodiment.
Simulating camera module 1 includes: ccd sensor circuit 11, signal processing circuit 12 and power module 13.Wherein,
Ccd sensor circuit 11 acquires picture signal and exports the picture signal of acquisition to signal processing circuit 12, signal processing electricity
Road 12 is for handling picture signal and being converted to analog video signal.
Charge coupled device ccd (Charge Coupled Device) is a kind of solid imaging device, by clock pulses
Voltage generates and controls the variation of semiconductor potential well, realizes the solid electronic device of storage and transmitting charge information, than tradition
Egative film more can be sensitive the variation for detecting light, be the Analogous Integrated Electronic Circuits developed on the basis of lsi technology
Chip.Under the driving of correct clock, ccd sensor circuit 11 will be radiated on its photosensitive unit using photoelectric conversion effect
Light energy is converted to charge, and exports in the form of a voltage, and each pixel period of 11 output signal of ccd sensor circuit can root
It is divided into three parts: reset level, floating grid level and video level, the entering signal after Hyblid Buffer Amplifier according to time sequencing
Processing circuit 12.Signal processing circuit 12 can by correlated-double-sampling CDS (Correlated Double Sample) circuit, can
Program gain amplifier PGA (Programmable Gain Amplifier) composition.The principle of correlated-double-sampling CDS is exactly to use
Two samplings keep pulse, one of them is pre-sampling pulse, another is data sampling pulse, to ccd sensor circuit 11
Each pixel in output signal carries out successive double sampling.When pre-sampling pulse is effective, first to floating in each pixel
Grid level portions carry out a pre-sampling and keep.When data sampling pulse is effective, then to video signal sampling and keep, two
Secondary sampling difference is real CCD vision signal.Due to the particularity of 11 output signal of ccd sensor circuit, cannot directly into
Row analog-to-digital conversion first can carry out correlated-double-sampling to it, extract the periodic analogue signal of representative image information and at it
Then middle addition pre-set image adjusts amplification factor pair by program using programmable gain amplifier PGA according to actual needs
CCD vision signal amplifies the analog video signal of outputting standard, is then transmitted by coaxial cable 2.
Illustratively, pre-set image is added in the picture signal of input in signal processing circuit 12, which can be item
Shape code, two dimensional code can be the regular figures such as circle, rectangle or other figures, to the concrete shape of the image, color, big
It is small etc. to be not specifically limited, for example, setting pre-set image is bar code image, it is arranged one in the lower-left method, edge of acquisition image
The high bar code of wide * 5 pixel of 256 pixels covers normal picture, after bar code image will be added in signal processing circuit 12
Picture signal be converted to standard analog video signal and export.
Power module 13 is used to simulate the circuit of camera module 1 and provide power supply.
Illustratively, power module 13 can for 12V1A, 12V2A power supply or centrally connected power source box 12V (5A, 10A, 20A,
30A) etc., power module 13 is that ccd sensor circuit 11 and signal processing circuit 12 provide power supply.
Interference detector module 3 includes video signal distribution circuit 31, vision signal A/D conversion circuit 32 and detection processing
Device 33.Wherein, video signal distribution circuit 31 includes input terminal a, the first output end b1 and second output terminal b2, vision signal point
Input terminal a with circuit 31 is electrically connected with coaxial cable 2, and the analog video signal for transmitting coaxial cable 2 is divided into first
Road analog video signal and the second road analog video signal, first via analog video signal and the second road analog video signal difference
From the first output end b1 and second output terminal b2 of video signal distribution circuit 31 export, vision signal A/D conversion circuit 32 with
The second output terminal b2 of video signal distribution circuit 31 is electrically connected, for the second road analog video signal to be converted to digital video
Signal, measurement processor 33 are electrically connected with vision signal A/D conversion circuit 32, and the image for detecting digital video signal is special
Sign, determines whether signal is disturbed.
Specifically, the input terminal a of video signal distribution circuit 31 receives the analog video letter of standard from coaxial cable 2
Number, by video input all the way, the analog video signal of input is divided into first via simulation by the working principle of multi-channel video output
Vision signal and the second road analog video signal are exported from the first output end b1 of video signal distribution circuit 31 and second respectively
B2 output is held, video signal distribution circuit 31 can realize video input all the way, multi-channel video output using video distributor.
The second output terminal b2 of video signal distribution circuit 31 exports the second road analog video signal to vision signal A/D conversion circuit
32, analog video signal digitlization is realized by vision signal A/D conversion circuit 32.Vision signal A/D conversion circuit 32 can be by
Video decoding chip is constituted, and is internally integrated analog-digital converter ADC (Analog-to-Digital Converter) unit, depending on
Frequency signal A/D conversion circuit 32 carries out sample quantization to the analog video signal that programmable gain amplifier PGA is exported and exports
Digital video signal, quantization digit can be 8bits, 10bits, 12bits, 14bits and 16bits, after sample quantization,
The analog video signal that vision signal A/D conversion circuit 32 exports the second output terminal b2 of video signal distribution circuit 31 decodes
At the digital signal for meeting ITU-R BT.656 standard and export to measurement processor 33.Measurement processor 33 can be by DSP core
Piece is constituted, and can be split pre-set image by thresholding method, after completing pre-set image segmentation, calculates pre-set image
Characteristic quantity, that is, extract the feature of pre-set image, and this feature can be color characteristic, textural characteristics, the shape feature etc. of image.?
In the case where not interfering with normally, measurement processor 33 extracts the feature of pre-set image as default characteristic value, while spy is arranged
Levy the goodness of fit.When video acquisition starts, measurement processor 33 transmits vision signal A/D conversion circuit 32 to be detected
Pre-set image in digital video signal is split, while extracting its feature, and this feature is made comparisons with default characteristic value, is led to
The feature goodness of fit that both judges is crossed to determine whether signal is disturbed.Compared to traditional Interference Detection, accuracy in detection is high,
Structure is simple, Interference Detection can be realized by simple software algorithm, cost is relatively low.
First output end b1 of video signal distribution circuit 31 can be electrically connected with video reception apparatus, vision signal distribution electricity
Road 31 is also used to export first via analog video signal to video reception apparatus.
Illustratively, video signal distribution circuit 31 can realize that video is defeated all the way using it using video distributor
Enter, the analog video signal that coaxial cable 2 transmits is divided into first via analog video signal and the by the function of multi-channel video output
First output end b1 of two road analog video signals, video signal distribution circuit 31 exports first via analog video signal to view
Frequency receiving device, the video reception apparatus can be analog video signal decoder, video frequency collection card etc..
Analog video signal interference detecting apparatus further includes alarm module 4,3 electricity of alarm module 4 and interference detector module
Connection.
Illustratively, when video image acquisition starts, when interference detector module 3 detects digital video signal to be detected
In pre-set image feature and default characteristic value the feature goodness of fit be less than preset value when, such as settable preset value be 85%,
When the goodness of fit is less than 85%, then it is assumed that the analog video signal that simulation camera module 1 acquires receives interference, Interference Detection
Device module 3 exports fault-signal to alarm module 4, and alarm module 4 is according to fault-signal alarm and display interference information.
To sum up, in the present embodiment, analog video signal is converted to digital video letter by vision signal A/D conversion circuit 32
Number, measurement processor 33 is split digital video signal under normal circumstances by thresholding method, extracts digital video
The feature of pre-set image in signal and as default characteristic value, while the feature goodness of fit is set, start in video acquisition
Afterwards, it by comparing the feature of the pre-set image in digital video signal to be detected and the feature goodness of fit of default characteristic value, realizes
To the Interference Detection of analog video signal, accuracy in detection is high, and structure is simple, and cost is relatively low, can be in simulation camera letter
It is widely applied in number acquisition system.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (6)
1. a kind of analog video signal interference detecting apparatus, which is characterized in that including coaxial cable and interference detector module；
The interference detector module is electrically connected by the coaxial cable with simulation camera module；
It is described simulation camera module have masked areas function signal processing circuit, the interference detector module for pair
The analog video signal of masked areas function signal processing circuit output is detected.
2. analog video signal interference detecting apparatus according to claim 1, which is characterized in that the simulation camera mould
Block includes ccd sensor circuit, and the ccd sensor circuit is electrically connected with the signal processing circuit；
The ccd sensor circuit exports the described image signal of acquisition to the signal for acquiring picture signal
Manage circuit；
The signal processing circuit is for handling described image signal and being converted to analog video signal.
3. analog video signal interference detecting apparatus according to claim 1, which is characterized in that the interference detector mould
Block includes video signal distribution circuit, vision signal A/D conversion circuit and measurement processor；
The video signal distribution circuit includes input terminal, the first output end and second output terminal, the vision signal distribution electricity
The input terminal on road is electrically connected with the coaxial cable, and the analog video signal for transmitting the coaxial cable is divided into the first via
Analog video signal and the second road analog video signal, the first via analog video signal and second road analog video letter
It is exported number respectively from the first output end and second output terminal of the video signal distribution circuit；
The vision signal A/D conversion circuit is electrically connected with the second output terminal of the video signal distribution circuit, for by the
Two road analog video signals are converted to digital video signal；
The measurement processor is electrically connected with the vision signal A/D conversion circuit, for detecting the digital video signal
Characteristics of image, determines whether signal is disturbed.
4. analog video signal interference detecting apparatus according to claim 3, which is characterized in that the vision signal distribution
First output end of circuit is electrically connected with video reception apparatus, and the video signal distribution circuit is also used to simulate the first via and regard
Frequency signal is exported to the video reception apparatus.
5. analog video signal interference detecting apparatus according to claim 1, which is characterized in that the simulation camera mould
Block further includes power module, and the power module is used to simulate the circuit of camera module and provide power supply.
6. analog video signal interference detecting apparatus according to claim 1, which is characterized in that it further include alarm module,
The alarm module is electrically connected with the interference detector module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821385258.8U CN208707830U (en) | 2018-08-27 | 2018-08-27 | A kind of analog video signal interference detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821385258.8U CN208707830U (en) | 2018-08-27 | 2018-08-27 | A kind of analog video signal interference detecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208707830U true CN208707830U (en) | 2019-04-05 |
Family
ID=65945170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821385258.8U Expired - Fee Related CN208707830U (en) | 2018-08-27 | 2018-08-27 | A kind of analog video signal interference detecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208707830U (en) |
-
2018
- 2018-08-27 CN CN201821385258.8U patent/CN208707830U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150312479A1 (en) | Image Sensor Having a Uniform Digital Power Signature | |
| ATE221988T1 (en) | DEVICE AND METHOD FOR MEASURING A LIGHT SPECTRUM | |
| CN107423212B (en) | Method and device for evaluating response delay of screen of virtual reality equipment | |
| US20170064211A1 (en) | Imaging providing ratio pixel intensity | |
| GB2363927A (en) | An improved light sensor with increased dynamic range | |
| McMackin et al. | A high-resolution SWIR camera via compressed sensing | |
| CN107219638B (en) | Super-resolution relevance imaging system and imaging method based on low-pass filtering | |
| CA2229511A1 (en) | Image processing device and method | |
| CN108737815B (en) | Quality detection method and system of image sensor | |
| WO2007075181A3 (en) | Apparatus and method for detection of radioactive materials | |
| ATE500688T1 (en) | METHOD AND APPARATUS FOR REDUCING THE EFFECTS OF DARK CURRENT AND DEFECTIVE PIXELS IN AN IMAGING DEVICE | |
| CN111553194B (en) | Method and system for detecting foreign matters in GIS equipment based on double light sources | |
| CN101458300B (en) | Circuit discharging detecting system | |
| GB2430106A (en) | A method of and system for reconstructing a digital optical image | |
| Katz et al. | Live demonstration: Behavioural emulation of event-based vision sensors | |
| CN106483051A (en) | A kind of device and mobile terminal measuring atmosphere particle concentration for mobile terminal | |
| CN208707830U (en) | A kind of analog video signal interference detecting apparatus | |
| Cheng et al. | Gamma measurement based on CMOS sensor and ARM microcontroller | |
| WO1992012596A1 (en) | Dynamic offset to increase the range of digitization of video images | |
| Satoh et al. | Robust event detection by radial reach filter (RRF) | |
| CN104851114B (en) | A kind of method and terminal for realizing image local discoloration | |
| US11523073B2 (en) | Image sensor with noise cancellation feature and electronic device with same | |
| CN100367281C (en) | Pulsed laser spot software synchronization acquisition method | |
| CN108391106A (en) | Optical projection system, projection device and method for displaying projection | |
| WO2005000120A3 (en) | Pmt signal correlation filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190405 |