CN219475417U - CTP test is with version ration coating detection device - Google Patents
CTP test is with version ration coating detection device Download PDFInfo
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- CN219475417U CN219475417U CN202320272942.XU CN202320272942U CN219475417U CN 219475417 U CN219475417 U CN 219475417U CN 202320272942 U CN202320272942 U CN 202320272942U CN 219475417 U CN219475417 U CN 219475417U
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Abstract
The utility model discloses a quantitative coating detection device for a CTP test plate, which comprises a visual detection module and an image processing module, wherein the visual detection module comprises a CCD image sensor for collecting CTP test plate coating image signals; the waveform stabilizer is utilized to condition the image acquisition signals, and the output waveforms of the image acquisition signals are improved, so that the image acquisition signal processing is more stable; and a double-channel filter is adopted to perform frequency selection output on the image acquisition signals, so that external noise interference is well restrained, and the image acquisition precision is improved.
Description
Technical Field
The utility model relates to the technical field of plate detection for CTP (computer to plate) testing, in particular to a plate quantitative coating detection device for CTP testing.
Background
The coating machine is required to carry out coating in the CTP plate production process, most of existing coating devices are in the form of anilox rollers and scrapers, and the existing coating devices are easy to leave anilox marks for the coating and influence the subsequent stencil printing, so that a 'coating device for a thermosensitive positive CTP plate' is mentioned in a patent with the publication number of CN206622261U, and reasonable and effective coating operation is completed by adding a smooth roller and a device cover body on the traditional coating device, so that the quantitative coating effect of the CTP plate can be well ensured.
The CTP quality detection device can detect a plurality of CTP plate coatings simultaneously, and when the CTP plate is detected, the CTP plate is lifted and obliquely arranged, the CTP plate is observed from the horizontal direction manually, and the detection camera detects from the obliquely upper side, so that the detection efficiency can be effectively improved and missing of bad plates can be avoided. Because the detection camera uses the machine vision technology to detect the image based on the CCD industrial camera, the image acquisition signal processing is easily affected by external environmental factors in the detection process, so that the detection signal transmission of the CCD image sensor is seriously interfered, the detection equipment precision is low, and the test result has errors.
The present utility model provides a new solution to this problem.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the utility model aims to provide a quantitative coating detection device for a CTP test plate.
The technical scheme for solving the problems is as follows: the utility model provides a CTP test is with version ration coating detection device, includes vision detection module and image processing module, vision detection module is including the CCD image sensor that is used for gathering CTP test and uses version coating image signal, CCD image sensor's detected signal sends in proper order to wave form stabilizer and binary channels wave filter in to take care of, and send the image acquisition signal after taking care to image processing module.
Preferably, the waveform stabilizer comprises a MOS tube Q1, the source electrode of the MOS tube Q1 is connected with resistors R1 and R2 and one end of a capacitor C1, the other end of the resistor R1 is grounded, the other end of the capacitor C2 is connected with the signal output end of the CCD image sensor, the other end of the resistor R2 is connected with the grid electrode of the MOS tube Q1 and is grounded through the capacitor C2, and the drain electrode of the MOS tube Q1 is connected with the input end of the dual-channel filter.
Preferably, the dual-channel filter includes an operational amplifier AR1 and an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR1 is connected to the output end of the waveform stabilizer through a capacitor C4 and grounded through a resistor R4, and the inverting input end of the operational amplifier AR1 is connected to the output end of the operational amplifier AR1 through a resistor R5 and grounded through a resistor R6; the non-inverting input end of the operational amplifier AR2 is connected with the output end of the waveform stabilizer through a resistor R3 and grounded through a capacitor C3, and the inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR2 through a resistor R7 and grounded through a resistor R8; the output ends of the operational amplifier AR1 and the operational amplifier AR2 are connected with one end of a capacitor C5 and the image processing module through a diode D1, and the other end of the capacitor C5 is grounded.
Preferably, the image processing module selects an image signal processing chip AK8408.
Through the technical scheme, the utility model has the beneficial effects that:
1. according to the utility model, the visual detection module is used for collecting the CTP test plate surface coating image, and the image signal is sequentially sent to the waveform stabilizer and the dual-channel filter for conditioning through the signal output end of the image signal, so that the precision of the detection equipment is improved, and the accuracy of the coating quality detection result is ensured;
2. the waveform stabilizer is utilized to condition the image acquisition signals, and the output waveforms of the image acquisition signals are improved, so that the image acquisition signal processing is more stable; and a double-channel filter is adopted to perform frequency selection output on the image acquisition signals, so that external noise interference is well restrained, and the image acquisition precision is improved.
Drawings
Fig. 1 is a schematic circuit diagram of a waveform stabilizer of the present utility model.
Fig. 2 is a schematic circuit diagram of a dual-channel filter of the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
The utility model provides a CTP test is with version ration coating detection device, includes vision detection module and image processing module, and vision detection module is including the CCD image sensor that is used for gathering CTP test with version coating image signal, CCD image sensor's detected signal sends in proper order to wave form stabilizer and binary channels wave filter in to take care of, and send the image acquisition signal after taking care to image processing module.
As shown in fig. 1, the waveform stabilizer includes a MOS transistor Q1, where a source of the MOS transistor Q1 is connected to resistors R1 and R2 and one end of a capacitor C1, the other end of the resistor R1 is grounded, the other end of the capacitor C2 is connected to a signal output end of the CCD image sensor, the other end of the resistor R2 is connected to a gate of the MOS transistor Q1 and grounded through the capacitor C2, and a drain of the MOS transistor Q1 is connected to an input end of the dual-channel filter.
As shown in fig. 2, the dual-channel filter includes an operational amplifier AR1 and an operational amplifier AR2, wherein the non-inverting input terminal of the operational amplifier AR1 is connected to the output terminal of the waveform stabilizer through a capacitor C4 and grounded through a resistor R4, and the inverting input terminal of the operational amplifier AR1 is connected to the output terminal of the operational amplifier AR1 through a resistor R5 and grounded through a resistor R6; the non-inverting input end of the operational amplifier AR2 is connected with the output end of the waveform stabilizer through a resistor R3 and grounded through a capacitor C3, and the inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR2 through a resistor R7 and grounded through a resistor R8; the output ends of the operational amplifier AR1 and the operational amplifier AR2 are connected with one end of a capacitor C5 and the image processing module through a diode D1, and the other end of the capacitor C5 is grounded.
When the utility model is specifically applied, the visual detection module is used for collecting the CTP test plate surface coating image, the CCD image sensor in the detection camera is used for collecting image signals, and the image signals are sequentially sent to the waveform stabilizer and the dual-channel filter for conditioning through the signal output end of the image signals, and the specific conditioning process and principle are as follows:
firstly, conditioning an image acquisition signal by using a waveform stabilizer, coupling an output signal of a CCD image sensor by using a capacitor C1, then sending the coupled output signal into a MOS tube Q1 for amplification, wherein a capacitor C2 plays a role in compensating and stabilizing at a gate end of the MOS tube Q1, so that fluctuation of the image acquisition signal is avoided, and the output waveform of the image acquisition signal is improved by using good temperature characteristics of the MOS tube Q1, so that the image acquisition signal processing is more stable;
in order to inhibit the influence of external environment interference, a dual-channel filter is adopted to further condition the signals processed by the waveform stabilizer; the output signals of the waveform stabilizer are respectively sent to the operational amplifier AR1 and the operational amplifier AR2 in two paths for two-path amplification, RC high-pass filter networks and RC low-pass filter networks are respectively arranged at the non-inverting input ends of the operational amplifier AR1 and the operational amplifier AR2, so that RC band-pass filter is formed to perform frequency selection output on image acquisition signals, external noise interference is well restrained, image acquisition precision is improved, and finally the image acquisition signals are shaped through a diode D1 and a capacitor C5 and then sent to an image acquisition module;
when the device is specifically set, the image processing module selects the image signal processing chip AK8408, the chip can convert the analog signal output by the image processing module into a digital signal for analysis and processing, and meanwhile, the image processing module can perform advanced processing on the bright output deviation value and the dark output deviation value of the image sensor according to the self setting of a user, so that the computing and analysis processing capacity of image acquisition data is effectively ensured, the precision of detection equipment is improved, and the accuracy of a coating quality detection result is ensured.
While the utility model has been described in connection with certain embodiments, it is not intended that the utility model be limited thereto; for those skilled in the art to which the present utility model pertains and the related art, on the premise of based on the technical scheme of the present utility model, the expansion, the operation method and the data replacement should all fall within the protection scope of the present utility model.
Claims (4)
1. The utility model provides a CTP test is with version ration coating detection device, includes visual detection module and image processing module, its characterized in that: the visual detection module comprises a CCD image sensor for collecting CTP test plate coating image signals, detection signals of the CCD image sensor are sequentially sent to the waveform stabilizer and the dual-channel filter for conditioning, and conditioned image collection signals are sent to the image processing module.
2. The CTP assay plate quantitative coating detection apparatus of claim 1, wherein: the waveform stabilizer comprises a MOS tube Q1, wherein a source electrode of the MOS tube Q1 is connected with resistors R1 and R2 and one end of a capacitor C1, the other end of the resistor R1 is grounded, the other end of the capacitor C2 is connected with a signal output end of the CCD image sensor, the other end of the resistor R2 is connected with a grid electrode of the MOS tube Q1 and is grounded through the capacitor C2, and a drain electrode of the MOS tube Q1 is connected with an input end of the dual-channel filter.
3. The CTP assay plate quantitative coating detection apparatus according to claim 2, wherein: the dual-channel filter comprises an operational amplifier AR1 and an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR1 is connected with the output end of the waveform stabilizer through a capacitor C4 and grounded through a resistor R4, and the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R5 and grounded through a resistor R6; the non-inverting input end of the operational amplifier AR2 is connected with the output end of the waveform stabilizer through a resistor R3 and grounded through a capacitor C3, and the inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR2 through a resistor R7 and grounded through a resistor R8; the output ends of the operational amplifier AR1 and the operational amplifier AR2 are connected with one end of a capacitor C5 and the image processing module through a diode D1, and the other end of the capacitor C5 is grounded.
4. The CTP assay plate quantitative coating detection apparatus of claim 1, wherein: the image processing module selects an image signal processing chip AK8408.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320272942.XU CN219475417U (en) | 2023-02-21 | 2023-02-21 | CTP test is with version ration coating detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320272942.XU CN219475417U (en) | 2023-02-21 | 2023-02-21 | CTP test is with version ration coating detection device |
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| Publication Number | Publication Date |
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| CN219475417U true CN219475417U (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320272942.XU Active CN219475417U (en) | 2023-02-21 | 2023-02-21 | CTP test is with version ration coating detection device |
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- 2023-02-21 CN CN202320272942.XU patent/CN219475417U/en active Active
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