CN202475588U - Binarized threshold adjustable contact-type image sensor signal acquisition device - Google Patents
Binarized threshold adjustable contact-type image sensor signal acquisition device Download PDFInfo
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- CN202475588U CN202475588U CN2012201370604U CN201220137060U CN202475588U CN 202475588 U CN202475588 U CN 202475588U CN 2012201370604 U CN2012201370604 U CN 2012201370604U CN 201220137060 U CN201220137060 U CN 201220137060U CN 202475588 U CN202475588 U CN 202475588U
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Abstract
The utility model discloses a binarized threshold adjustable contact-type image sensor signal acquisition device which comprises a signal acquisition module, a signal processing module and a contact-type image sensor, wherein the signal output end of the contact-type image sensor is connected with the signal input end of the signal acquisition module, the signal output end of the signal acquisition module is connected with the signal input end of the signal processing module respectively, and the signal output end of the signal processing module is connected with the signal acquisition module and the contact-type image sensor respectively. The signal processing module comprises a frequency generating module and a power amplification module. According to the utility model, a comparative amplifying circuit of the signal acquisition module compares analog signals acquired by the contact-type image sensor with a given reference voltage and then outputs digital signals, then the digital signals are combined by the signal processing module so as to form a binarized image of a scanned image.
Description
Technical field
The utility model is applicable to the image scanning application, is specifically related to the adjustable contact-type image sensor signal pickup assembly of a kind of binary-state threshold.
Background technology
The picture signal pick-up transducers is of a great variety, and the field of application is very wide.The IMAQ transducer of using always mainly contains the transducer as scan-image such as contact-type image sensor, charge coupled cell, complementary metal oxide semiconductors (CMOS); Contact-type image sensor is a kind of of linear transducer; Be to be used for the image or the file scan on plane are become electronic format, so that the photoelectric cell that stores, shows, handles or transmit.The characteristic that product has gently, approaches, and because assembling is easy, but plug and play can be saved production cost.Contact-type image sensor has a wide range of applications in a lot of image acquisition transmission systems.
Picture signal pick-up transducers signals collecting is the focus of research with handling always; At present; The information gathering of being adopted, processing controls plate mainly comprise independently clock generating circuit, high-speed a/d change-over circuit, microprocessor etc.; Such control board can satisfy the collection of general pattern transducing signal, but will increase the cost of system, has reduced the operating efficiency of system.
Summary of the invention
The purpose of the utility model is to provide the adjustable contact-type image sensor signal pickup assembly of binary-state threshold that a kind of accuracy of detection is high, real-time is good, stability is high.
The contact-type image sensor signal pickup assembly that a kind of binary-state threshold is adjustable; Comprise signal acquisition module, signal processing module, contact-type image sensor; The signal output part of contact-type image sensor is connected with the signal input part of signal acquisition module; The signal output part of signal acquisition module is connected with the signal input part of signal processing module respectively, and the signal output part of signal processing module is connected with signal acquisition module, contact-type image sensor respectively.
Said signal processing module comprises frequency generating module, the power amplifier module, the capture module that are used to amplify the clock signal that drives contact-type image sensor that is used to produce the required clock signal of contact-type image sensor work, the processing module that is used for the signal message processing; The frequency generating module is connected with contact-type image sensor through power amplifier module; The signal output part of signal acquisition module is connected with the input of input capture module; The output of capture module is connected with the input of processing module, and the output of processing module is connected with the input of signal acquisition module.
The frequency generating module that signal processing module is inner integrated is used to produce the required clock signal of contact-type image sensor work, and utilizes power amplification circuit that clock signal is amplified to drive contact-type image sensor work.
Said signal acquisition module comprises analog switch group, comparison amplifying circuit; The signal output part of message processing module is connected with the input of analog switch group; The analog switch group is connected with the comparison amplifying circuit; The signal output part of contact-type image sensor is connected with the signal input part that compares amplifying circuit, and relatively the signal output part of amplifying circuit is connected with the input of message processing module.
Said analog switch group is the high-speed analog switch group, and different analog switches has different bias voltage in the said analog switch group.
The signal processing module of processing signals adopts specific algorithm computation to go out the reference voltage of comparison amplifying circuit, and then adjusts the threshold value of the processing of binaryzation according to the data that collect, and has reduced the noise of digital picture.
Said signal processing module also is connected with the external memory storage that is used to preserve image data.Signal processing module is saved in external memory storage with the reference voltage of digital image information that obtains and the comparison amplifying circuit that calculates.
Said signal processing module is a single-chip microcomputer.The single-chip microcomputer inner packet contains frequency generating module, power amplifier module, can when the contact-type image sensor images acquired, avoid expending the too many time aspect the signal Synchronization.
The workflow of the contact-type image sensor signal pickup assembly that the binary-state threshold of the utility model is adjustable is:
1) the frequency generating module produces the required clock signal of contact-type image sensor work;
2) the power amplifier module amplification procedure 1) clock signal drive contact-type image sensor work;
3) image information of contact-type image sensor acquisition scans part, the output analog voltage;
4) switch of analog switch in the signal processing module control analog switch group changes the relatively reference voltage of amplifying circuit;
5) step 3) obtains the digital image information input signal processing module of output analog voltage after comparing amplifying circuit;
6) the signal processing module a series of digital image informations combination that will collect obtains complete binaryzation digital picture;
7) signal processing module is saved in external memory storage with digital image information, and calculates the relatively required next time valve value compensation value of amplifying circuit, is saved in external memory storage.
The relative prior art of the utility model has following advantage and beneficial effect:
(1) cooperates power amplifier module to produce the clock signal of contact-type image sensor need of work through the inner frequency generating module of signal processing module, can exempt the clock synchronization issue that data acquisition exists;
(2) through the analog switch group, the reference voltage that compares amplifying circuit is carried out regulating and controlling, can change the threshold value of binaryzation according to actual conditions;
(3) through gathering the picture signal of returning, can calculate optimized reference voltage, can carry out real-Time Compensation the reference circuit that compares amplifying circuit.
Description of drawings
Fig. 1 is the utility model system block diagram;
Fig. 2 is the comparison amplification circuit diagram of the said controlled threshold value of the utility model;
Fig. 3 is the said contact-type image sensor working timing figure of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model key technology main points are done further explain, but the execution mode of the utility model is not limited thereto.
As shown in Figure 1; Signal pickup assembly in the utility model comprises signal acquisition module 1, signal processing module 2, contact-type image sensor 3; Wherein signal processing module 2 employing models are the single-chip microcomputer of C8051F340; Single-chip microcomputer comprises frequency generating module 21, the power amplifier module 22, the capture module 23 that are used to amplify the clock signal that drives contact-type image sensor 3 that is used to produce the required clock signal of contact-type image sensor 3 work, the processing module 24 that is used for the signal message processing; Said frequency generating module 21 is connected with contact-type image sensor 3 through power amplifier module 22; The signal output part of signal acquisition module 1 is connected with the input of input capture module 23; The output of input capture module 23 is connected with the input of processing module 24, and the output of processing module 24 is connected with the input of signal acquisition module 1.
Like Fig. 2 is the circuit diagram of the comparison amplifying circuit 12 of the utility model adjustable threshold value, and wherein 6 analog switch gate circuits bias voltage that under the control of single-chip microcomputer, can produce various combination is added in the comparison amplifying circuit 12, can realize that threshold value is controlled.
Workflow comprises: 1) the inner frequency generating module 21 of single-chip microcomputer produces the required clock signal of contact-type image sensor 3 work; Be input in the contact-type image sensor 3 through behind the power amplifier module 22; After waiting for some clock signals; The information of scanned copy is through contact-type image sensor 3 scanning output analog voltages, and signal converts the manageable logic level of single-chip microcomputer to through having added the comparison amplifying circuit 12 of analog switch group 11 output offset voltages; 2) single-chip microcomputer is saved in the digital image information that collects in the external memory storage, and compares the valve value compensation value that amplifying circuit 12 needs next time by the image information calculating that obtains, and is saved in the external memory storage;
Fig. 3 is the working timing figure of contact-type image sensor 3; Its workflow is following: after the synchronizing signal trailing edge of contact-type image sensor 3 arrives; Each work clock trailing edge of contact-type image sensor 3 all can output pixel the analogue value; All export up to one-row pixels, it is individual to suppose that the contact type image one-row pixels has.The contact-type image sensor line synchronizing signal also need be waited for several work clock cycles after waiting for that all pixels are all exported, beginning next line scanning output.
Claims (6)
1. contact-type image sensor signal pickup assembly that binary-state threshold is adjustable; It is characterized in that comprising signal acquisition module (1), signal processing module (2), contact-type image sensor (3); The signal output part of said contact-type image sensor (3) is connected with the signal input part of signal acquisition module (1); The signal output part of signal acquisition module (1) is connected with the signal input part of signal processing module (2) respectively, and the signal output part of signal processing module (2) is connected with signal acquisition module (1), contact-type image sensor (3) respectively.
2. the contact-type image sensor signal pickup assembly that binary-state threshold according to claim 1 is adjustable; It is characterized in that said signal processing module (2) comprises frequency generating module (21), the power amplifier module (22), the capture module (23) that are used for amplifying the clock signal that drives contact-type image sensor (3) that is used to produce the required clock signal of contact-type image sensor (3) work, the processing module (24) that is used for the signal message processing; Said frequency generating module (21) is connected with contact-type image sensor (3) through power amplifier module (22); The signal output part of signal acquisition module (1) is connected with the input of input capture module (23); The output of capture module (23) is connected with the input of processing module (24), and the output of processing module (24) is connected with the input of signal acquisition module (1).
3. the contact-type image sensor signal pickup assembly that binary-state threshold according to claim 1 is adjustable is characterized in that said signal acquisition module (1) comprises analog switch group (11), compares amplifying circuit (12); The signal output part of signal processing module (2) is connected with the input of analog switch group (11); Analog switch group (11) is connected with comparison amplifying circuit (22); The signal output part of contact-type image sensor (3) is connected with the signal input part that compares amplifying circuit (12), and relatively the signal output part of amplifying circuit (12) is connected with the input of signal processing module (2).
4. the contact-type image sensor signal pickup assembly that binary-state threshold according to claim 3 is adjustable; It is characterized in that said analog switch group (11) is the high-speed analog switch group, different analog switches has different bias voltage in the said analog switch group (11).
5. the contact-type image sensor signal pickup assembly that binary-state threshold according to claim 4 is adjustable is characterized in that said signal processing module (2) also is connected with the external memory storage that is used to preserve image data.
6. the contact-type image sensor signal pickup assembly that binary-state threshold according to claim 5 is adjustable is characterized in that said signal processing module (2) is a single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201370604U CN202475588U (en) | 2012-04-01 | 2012-04-01 | Binarized threshold adjustable contact-type image sensor signal acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201370604U CN202475588U (en) | 2012-04-01 | 2012-04-01 | Binarized threshold adjustable contact-type image sensor signal acquisition device |
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| CN202475588U true CN202475588U (en) | 2012-10-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102638636A (en) * | 2012-04-01 | 2012-08-15 | 广东工业大学 | Image sensing signal acquisition device with adjustable binarization threshold hardware, and control method |
| CN105741413A (en) * | 2015-08-05 | 2016-07-06 | 深圳怡化电脑股份有限公司 | Depositing and withdrawing device, dynamic correction sensor thereof, correction method and device |
-
2012
- 2012-04-01 CN CN2012201370604U patent/CN202475588U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102638636A (en) * | 2012-04-01 | 2012-08-15 | 广东工业大学 | Image sensing signal acquisition device with adjustable binarization threshold hardware, and control method |
| CN105741413A (en) * | 2015-08-05 | 2016-07-06 | 深圳怡化电脑股份有限公司 | Depositing and withdrawing device, dynamic correction sensor thereof, correction method and device |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20200401 |