CN110290359B - Camera signal transmission system - Google Patents
Camera signal transmission system Download PDFInfo
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- CN110290359B CN110290359B CN201910702290.7A CN201910702290A CN110290359B CN 110290359 B CN110290359 B CN 110290359B CN 201910702290 A CN201910702290 A CN 201910702290A CN 110290359 B CN110290359 B CN 110290359B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The invention discloses a camera signal transmission system, which comprises a frequency acquisition circuit, a distortion calibration circuit and an operational amplifier limiting circuit, wherein the frequency acquisition circuit acquires the frequency of an analog signal modulated in a controller, the distortion calibration circuit uses an operational amplifier AR3, a diode D2 and a diode D3 to form a noise reduction circuit to reduce the noise ratio of the signal, simultaneously uses an operational amplifier AR1, a capacitor C7-a capacitor C9 to form a wave limiting circuit to limit the amplitude of the signal, uses a triode Q5 and a triode Q6 to form a switching circuit to detect an abnormal signal, the triode Q5 feeds back a high-level signal to the inverting input end of the operational amplifier AR3, the triode Q6 feeds back a low-level signal, the operational amplifier limiting circuit uses a limiting circuit formed by a diode D6 and a diode D7 to limit the potential of the signal and then inputs the limiting circuit into the analog signal modulated in the controller, and can monitor the frequency of the analog signal modulated in the controller in real time, the signal is adjusted and converted into a video signal compensation calibration signal received by the controller.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a camera signal transmission system.
Background
At present, a camera signal transmission system, including controller, video signal collection module, signal transmission module and signal compensation module, display module, video signal collection module gathers video signal, transmits to the controller in through signal transmission module, and the analog signal after the controller received and analyzes signal control display module and show the video, and the video signal that the controller received makes the signal have the distortion phenomenon because of the conduction loss of signal, therefore signal compensation module is to the video signal compensation calibration that the controller received.
Disclosure of Invention
In view of the above situation, and in order to overcome the defects in the prior art, an object of the present invention is to provide a camera signal transmission system, which has the characteristics of ingenious design and humanized design, and can monitor the frequency of an analog signal modulated in a controller in real time, and convert the signal into a video signal compensation calibration signal received by the controller after the signal is adjusted.
The technical scheme for solving the problem is that the camera signal transmission system comprises a controller, a video signal acquisition module, a signal transmission module, a signal compensation module and a display module, wherein the video signal acquisition module acquires a video signal and transmits the video signal into the controller through the signal transmission module;
the frequency acquisition circuit acquires the frequency of an analog signal modulated in the controller, the distortion calibration circuit uses an operational amplifier AR3, a diode D2 and a diode D3 to form a noise reduction circuit to reduce the noise ratio of the signal, simultaneously uses a triode Q1, a triode Q2, a diode D4 and a diode D5 to form an adjusting circuit to prevent signal crossover distortion, then uses a triode Q3 and a triode Q4 to form a push-pull circuit to reduce the signal conduction loss, finally uses an operational amplifier AR1, a capacitor C7 and a capacitor C9 to form a wave limiting circuit to limit the amplitude of the signal, uses a triode Q5 and a triode Q6 to form a switching circuit to detect abnormal signals, feeds back a high-level signal to the inverting input end of the operational amplifier AR3 through a triode Q5, feeds back a low-level signal through a frequency modulation circuit consisting of a triode Q7, a triode Q8 and a capacitor C2-C5, and inputs the signal to the output end of the operational amplifier AR 58, the operational amplifier limiting circuit amplifies signals in phase by using an operational amplifier AR2, and simultaneously uses a limiting circuit consisting of a diode D6 and a diode D7 to limit the signal potential and then inputs the signal potential into a modulated analog signal in a controller.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. the noise reduction circuit is formed by an operational amplifier AR3, a diode D2 and a diode D3, the noise reduction circuit is formed by a diode D2 and a diode D3 which are connected in series and reversely to reduce noise of an output signal of the operational amplifier AR3, meanwhile, a regulating circuit is formed by a triode Q1, a triode Q2, a diode D4 and a diode D5 to prevent signal crossover distortion, then a push-pull circuit is formed by a triode Q3 and a triode Q4 to reduce signal conduction loss and improve the switching speed of the signal, finally, the operational amplifier AR1, a capacitor C7 and a capacitor C9 are used to form a wave limiting circuit to limit the amplitude of the signal, a frequency selecting circuit is formed by a resistor R12, a resistor R14 and a capacitor C7 and a capacitor C9 to isolate abnormal frequency signals, and an operational amplifier AR1 is used to amplify the signal to realize the function;
2. a switching circuit consisting of a triode Q5 and a triode Q6 is used for detecting abnormal signals, a triode Q5 feeds back high-level signals to the inverting input end of an operational amplifier AR3, the output signal potential of the operational amplifier AR3 is adjusted, a triode Q6 feeds back low-level signals, the signals are input into the output end of the operational amplifier AR3 after frequency modulation is carried out through a frequency modulation circuit consisting of a triode Q7, a triode Q8 and a capacitor C2-capacitor C5, a capacitor C3 and a capacitor C4 are bypass capacitors and filter high-frequency signal noise, a capacitor C2 and a capacitor C5 are decoupling capacitors and filter low-frequency signal noise to realize frequency modulation on the signals, and finally the signals are fed back to the output end of the operational amplifier AR 3.
Drawings
Fig. 1 is a circuit diagram of a camera signal transmission system according to the present invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In a first embodiment, a camera signal transmission system includes a frequency acquisition circuit, a distortion calibration circuit and an operational amplifier limiting circuit, the frequency acquisition circuit acquires the frequency of an analog signal modulated in a controller, the distortion calibration circuit uses an operational amplifier AR3, a diode D2 and a diode D3 to form a noise reduction circuit to reduce the noise ratio of the signal, uses a transistor Q1, a transistor Q2, a diode D4 and a diode D5 to form a regulation circuit to prevent signal crossover distortion, uses a transistor Q3 and a transistor Q4 to form a push-pull circuit to reduce the signal conduction loss, uses an operational amplifier AR1 and a capacitor C7-capacitor C9 to form a wave limiting circuit to limit the amplitude of the signal, uses a transistor Q5 and a transistor Q6 to form a switching circuit to detect an abnormal signal, feeds a high-level signal back to the inverse input end of the operational amplifier AR3 by the transistor Q5, feeds back a low-level signal by the transistor Q6, the frequency of a frequency modulation circuit consisting of a triode Q7, a triode Q8 and a capacitor C2-C5 is modulated, and then a signal is input into the output end of an operational amplifier AR3, the operational amplifier limiting circuit amplifies the signal in phase by using an operational amplifier AR2, and simultaneously a limiting circuit consisting of a diode D6 and a diode D7 limits the signal potential and then inputs the signal into a modulated analog signal in a controller;
the distortion calibration circuit uses an operational amplifier AR3, a diode D2 and a diode D3 to form a noise reduction circuit to reduce the noise ratio of signals, uses a diode D2 and a diode D3 to be connected in series and reversely to reduce the noise of the signals output by the operational amplifier AR3, uses a triode Q1, a triode Q2, a diode D4 and a diode D5 to form an adjusting circuit to prevent signal cross distortion, uses a triode Q3 and a triode Q4 to form a push-pull circuit to reduce the signal conduction loss and improve the switching speed of the signals, uses the operational amplifier AR1 and a capacitor C7-capacitor C9 to form a wave limiting circuit to limit the amplitude of the signals, uses a resistor R12-resistor R14 and a capacitor C7-capacitor C9 to form a frequency selecting circuit to isolate abnormal frequency signals, uses an operational amplifier AR1 to amplify the signals to realize the effect of signal waveform adjustment, and uses a triode Q5 and a triode Q6 to form a switching circuit to detect abnormal, the triode Q5 feeds back a high-level signal to the inverting input end of the operational amplifier AR3, the output signal potential of the operational amplifier AR3 is adjusted, the triode Q6 feeds back a low-level signal, the signal is input into the output end of the operational amplifier AR3 after being frequency modulated by a frequency modulation circuit consisting of the triode Q7, the triode Q8 and a capacitor C2-C5, the capacitor C3 and the capacitor C4 are bypass capacitors and filter high-frequency signal noise, the capacitor C2 and the capacitor C5 are decoupling capacitors and filter low-frequency signal noise to realize the frequency modulation effect on the signal, and finally the signal is fed back into the output end of the operational amplifier AR 3;
the distortion calibration circuit has the specific structure that the non-inverting input end of an operational amplifier AR3 is connected with the anode of a diode D2 and one end of a capacitor C6, the inverting input end of an operational amplifier AR3 is connected with one end of a resistor R3 and one end of a resistor R4, the other end of the resistor R3 is grounded, the output end of the operational amplifier AR3 is connected with the other end of a resistor R4, the other end of a capacitor C6 and the anode of a diode D6, the anode of the diode D6 and the cathode of the diode D6, the cathode of the diode D6 is connected with the cathode of the diode D6, the anode of the diode D6 is connected with the base of a transistor Q6 and one end of the resistor R6, the collector of the transistor Q6 and the other end of the resistor R6 are connected with a power supply +5V, the emitter of the transistor Q6 is connected with the emitter of the transistor Q6 and the base of the transistor Q6 and one end of the resistor R6 are connected with the base of the, the other end of the resistor R7 is grounded, the collector of the transistor Q3 is connected with a +5V power supply, the emitter of the transistor Q3 is connected with the emitter of the transistor Q4 and the resistor R4, one end of the capacitor C4, one end of the resistor R4 and the non-inverting input end of the operational amplifier AR 4, the collector of the transistor Q4 is grounded, the inverting input end of the operational amplifier AR 4 is connected with one end of the resistor R4, the other end of the resistor R4 is grounded, the output end of the operational amplifier AR 4 is connected with the other end of the resistor R4 and the resistor R4, one end of the resistor R4 and the emitter of the transistor Q4, the base of the transistor Q4 is connected with the resistor R4, one end of the capacitor C4 and the other end of the resistor R4, the other end of the resistor R4 is connected with the ground, and one end of the collector of the resistor Q4 is connected with the base of the transistor R4 and the base of the transistor Q4. The other end of the resistor R17 is connected with the inverting input end of the amplifier AR3, the collector of the triode Q6 is connected with the base of the triode Q7, the emitter of the triode Q6 is connected with the other end of the resistor R16, the collector of the triode Q7 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with one end of the resistor R9, one end of the capacitor C3 and the base of the triode Q8, the collector of the triode Q8 is connected with one end of the inductor L3 and the capacitor C5, the other end of the inductor L3 is connected with the other end of the resistor R9, the other end of the capacitor C5 and the negative electrode of the diode D4, the emitter of the triode Q8 is connected with one end of the capacitor C4, and the other end of.
In the second embodiment, on the basis of the first embodiment, the operational amplifier limiting circuit uses an operational amplifier AR2 to amplify a signal in phase, and uses a diode D6 and a diode D7 to form the limiting circuit to limit the signal potential and then inputs the signal potential into an analog signal modulated in the controller, that is, a video signal compensation calibration signal received by the controller, the non-inverting input terminal of the operational amplifier AR2 is connected to one end of a resistor R18 and the emitter of a triode Q6, the inverting input terminal of the operational amplifier AR2 is connected to one end of a resistor R19, the other end of the resistor R19 is connected to ground, the output terminal of the operational amplifier AR2 is connected to the other end of a resistor R18 and the cathode of a diode D6 and the anode of a diode D7, the anode of a diode D6 is connected to the cathode of a diode D7 and one end of a resistor R20, and the other.
In the third embodiment, on the basis of the first embodiment, the frequency acquisition circuit selects a frequency collector J1 with the model of SJ-ADC to acquire the frequency of the analog signal modulated in the controller, the power supply terminal of the frequency collector J1 is connected to +5V, the ground terminal of the frequency collector J1 is grounded, the output terminal of the frequency collector J1 is connected to the negative electrode of a voltage regulator tube D1 and one end of a resistor R1, the positive electrode of the voltage regulator tube D1 is grounded, the other end of the resistor R1 is connected to one end of a capacitor C1 and one end of a resistor R2, the other end of the resistor R2 is connected to the non-inverting input terminal of an amplifier AR3, and the other end of the capacitor C1 is.
When the invention is used in particular, the camera signal transmission system comprises a controller, a video signal acquisition module, a signal transmission module, a signal compensation module and a display module, wherein the video signal acquisition module acquires a video signal and transmits the video signal into the controller through the signal transmission module, the controller receives a modulated analog signal and analyzes the signal to control the display module to display a video, the signal compensation module compensates and calibrates the video signal received by the controller, the signal compensation module comprises a frequency acquisition circuit, a distortion calibration circuit and an operational amplifier limiting circuit, the frequency acquisition circuit acquires the frequency of the modulated analog signal in the controller, the distortion calibration circuit utilizes an operational amplifier AR3, a diode D2 and a diode D3 to form a noise reduction circuit to reduce the noise ratio of the signal, and the diode D2 and the diode D3 are connected in series in an inverted mode to reduce the noise of the output signal of the operational amplifier AR3, meanwhile, a regulating circuit consisting of a triode Q1, a triode Q2, a diode D4 and a diode D5 is used for preventing signal cross distortion, a push-pull circuit consisting of a triode Q3 and a triode Q4 is used for reducing signal conduction loss, the switching speed of signals is improved, a wave limiting circuit consisting of an operational amplifier AR1, a capacitor C7 and a capacitor C9 is used for limiting the amplitude of the signals, a frequency selecting circuit consisting of a resistor R12, a resistor R14, a capacitor C7 and a capacitor C9 is used for isolating abnormal frequency signals, an operational amplifier AR1 is used for amplifying the signals to realize the function of regulating the waveforms of the signals, a switching circuit consisting of a triode Q5 and a triode Q6 is used for detecting the abnormal signals, a triode Q5 feeds back high-level signals to the inverting input end of an operational amplifier AR3, the output signal potential of the operational amplifier AR3 is regulated, a triode Q6 feeds back low-level signals, and the frequency-modulated signals are input into an AR3 after passing through a frequency modulation circuit consisting of a triode Q7, a, the capacitor C3 and the capacitor C4 are bypass capacitors and filter high-frequency signal noise, the capacitor C2 and the capacitor C5 are decoupling capacitors and filter low-frequency signal noise to realize the frequency modulation effect on signals, and finally, the signals are fed back to the output end of the operational amplifier AR 3.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (4)
1. A camera signal transmission system comprises a controller, a video signal acquisition module, a signal transmission module, a signal compensation module and a display module, wherein the video signal acquisition module acquires a video signal and transmits the video signal into the controller through the signal transmission module;
the frequency acquisition circuit acquires the frequency of an analog signal modulated in the controller, the distortion calibration circuit uses an operational amplifier AR3, a diode D2 and a diode D3 to form a noise reduction circuit to reduce the noise ratio of the signal, simultaneously uses a triode Q1, a triode Q2, a diode D4 and a diode D5 to form an adjusting circuit to prevent signal crossover distortion, then uses a triode Q3 and a triode Q4 to form a push-pull circuit to reduce the signal conduction loss, finally uses an operational amplifier AR1, a capacitor C7, a capacitor C8 and a capacitor C9 to form a wave limiting circuit to limit the signal amplitude, uses a triode Q5 and a triode Q6 to form a switching circuit to detect an abnormal signal, uses a triode Q5 to feed back a high-level signal to the inverting input end of the operational amplifier AR 9, uses a triode Q6 to feed back a low-level signal, and inputs the frequency-modulated signal to the output end of the operational amplifier AR3 through a frequency modulation circuit formed by a triode Q7, a triode Q8, a capacitor C2, a capacitor, the operational amplifier limiting circuit amplifies signals in phase by using an operational amplifier AR2, and simultaneously uses a limiting circuit consisting of a diode D6 and a diode D7 to limit the signal potential and then inputs the signal potential into a modulated analog signal in a controller.
2. A camera signal transmission system according to claim 1, wherein said distortion calibration circuit comprises an operational amplifier AR3, a non-inverting input terminal of an operational amplifier AR3 is connected to an anode of a diode D2 and a terminal of a capacitor C6, an inverting input terminal of an operational amplifier AR3 is connected to one terminal of a resistor R3 and a resistor R4, the other terminal of a resistor R3 is grounded, an output terminal of an operational amplifier AR3 is connected to the other terminal of a resistor R4, the other terminal of a capacitor C6 and a cathode of a diode D3, an anode of a diode D5 and a cathode of a diode D4, a cathode of a diode D3 is connected to a cathode of a diode D2, an anode of a diode D2 is connected to a base of a transistor Q2 and a terminal of a resistor R2, a collector of the transistor Q2 and the other terminal of the resistor R2 are connected to a power supply +5V, an emitter of the transistor Q2 is connected to an emitter of the transistor Q2 and a cathode of the transistor Q2 and a resistor R2, the collector of the transistor Q2 is connected to the other end of the resistor R6 and one end of the resistor R7, the other end of the resistor R7 is grounded, the collector of the transistor Q7 is connected to +5V, the emitter of the transistor Q7 is connected to the emitter of the transistor Q7 and one end of the resistor R7, the capacitor C7, one end of the resistor R7 and the non-inverting input terminal of the operational amplifier AR 7, the collector of the transistor Q7 is grounded, the inverting input terminal of the operational amplifier AR 7 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to ground, the output terminal of the operational amplifier AR 7 is connected to the other end of the resistor R7 and one end of the resistor R7, one end of the resistor R7 and the emitter of the transistor Q7, the base of the transistor Q7 is connected to the resistor R7, one end of the capacitor C7 and the other end of the resistor R7, the other end of the capacitor C7 is connected to ground, and the other end of the resistor R7 and the resistor R7 are connected to, the collector of the triode Q5 is connected with one end of a resistor R17 and the base of the triode Q6, the other end of the resistor R17 is connected with the inverting input end of the amplifier AR3, the collector of the triode Q6 is connected with the base of the triode Q7, the emitter of the triode Q6 is connected with the other end of the resistor R16, the collector of the triode Q7 is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with the resistor R9, one end of a capacitor C3 and the base of the triode Q8, the collector of the triode Q8 is connected with one end of an inductor L3 and one end of a capacitor C5, the other end of the inductor L3 is connected with the other end of the resistor R3, the other end of the capacitor C3 and the cathode of a diode D3, the emitter of the triode Q3 is connected with one end of the capacitor C36.
3. The camera signal transmission system of claim 2, wherein the operational amplifier limiting circuit comprises an operational amplifier AR2, a non-inverting input terminal of the operational amplifier AR2 is connected to one end of a resistor R18 and an emitter of a transistor Q6, an inverting input terminal of the operational amplifier AR2 is connected to one end of a resistor R19, the other end of a resistor R19 is grounded, an output terminal of the operational amplifier AR2 is connected to the other end of the resistor R18, a cathode of a diode D6 and an anode of a diode D7, an anode of a diode D6 is connected to a cathode of the diode D7 and one end of a resistor R20, and the other end of the resistor R20 is connected to the signal output port.
4. The camera signal transmission system according to claim 1, wherein the frequency acquisition circuit comprises a frequency collector J1 with model number SJ-ADC, a power supply terminal of a frequency collector J1 is connected with +5V, a ground terminal of the frequency collector J1 is connected with ground, an output terminal of the frequency collector J1 is connected with a negative electrode of a voltage regulator D1 and one end of a resistor R1, a positive electrode of the voltage regulator D1 is connected with ground, the other end of the resistor R1 is connected with one end of a capacitor C1 and one end of a resistor R2, the other end of the resistor R2 is connected with a non-inverting input terminal of an amplifier AR3, and the other end of the capacitor C1 is connected with ground.
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| CN201910702290.7A CN110290359B (en) | 2019-07-31 | 2019-07-31 | Camera signal transmission system |
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| CN201910702290.7A CN110290359B (en) | 2019-07-31 | 2019-07-31 | Camera signal transmission system |
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| CN110533966B (en) * | 2019-10-14 | 2021-03-19 | 郑州铁路职业技术学院 | Foreign language spoken language correction system |
| CN110658773B (en) * | 2019-11-04 | 2020-06-09 | 郑州工程技术学院 | Robot scram control circuit |
| CN111181514A (en) * | 2020-02-29 | 2020-05-19 | 李韬 | Signal calibration device of medical endoscope |
| CN111245376A (en) * | 2020-02-29 | 2020-06-05 | 李韬 | Electrical cabinet remote monitoring system based on Internet of things |
| CN111245456B (en) * | 2020-03-01 | 2020-10-02 | 北京瞭望神州科技有限公司 | Service management system based on big data |
| CN111585584B (en) * | 2020-05-06 | 2022-02-25 | 上海山源电子科技股份有限公司 | 5G communication cable signal transmission system |
| CN113179394A (en) * | 2021-04-30 | 2021-07-27 | 深圳市金乾象科技有限公司 | Remote video monitoring device |
| CN113179395B (en) * | 2021-04-30 | 2021-10-15 | 深圳市金乾象科技有限公司 | Camera remote monitoring video transmission device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6940539B1 (en) * | 1999-04-30 | 2005-09-06 | General Electric Company | Variable cable length compensator for video imaging systems |
| EP1745644A1 (en) * | 2004-04-30 | 2007-01-24 | Telegent Systems, Inc. | Fft-based multichannel video receiver |
| TWI392364B (en) * | 2008-02-29 | 2013-04-01 | Analog Devices Inc | Feedback system and apparatus for video compensation |
| CN101860712B (en) * | 2010-04-20 | 2012-02-08 | 广东威创视讯科技股份有限公司 | Device and method for transmitting camera signals |
| CN109561299B (en) * | 2018-11-27 | 2020-05-01 | 河南亿秒电子科技有限公司 | Intelligent fault analysis equipment for monitoring camera |
| CN109831180B (en) * | 2019-02-26 | 2023-03-21 | 郑州力通水务有限公司 | Signal compensation circuit for water supply remote monitoring system |
| CN109889795B (en) * | 2019-04-17 | 2020-09-18 | 冯芊雅 | Household video monitoring system |
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