CN110418063B - Camera signal calibration system - Google Patents
Camera signal calibration system Download PDFInfo
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- CN110418063B CN110418063B CN201910815697.0A CN201910815697A CN110418063B CN 110418063 B CN110418063 B CN 110418063B CN 201910815697 A CN201910815697 A CN 201910815697A CN 110418063 B CN110418063 B CN 110418063B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
Abstract
The invention discloses a camera signal calibration system, which comprises a frequency acquisition circuit, a separation feedback circuit and a wave limiting output circuit, wherein the frequency acquisition circuit acquires the modulated analog signal frequency in a controller, the separation feedback circuit uses a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5 to form a synchronous separation circuit to divide the signal into two paths of signals with the same frequency and different amplitudes, one path of the signals is input into a noise reduction circuit consisting of an operational amplifier AR1, a diode D1 and a diode D2 to reduce the signal-to-noise ratio, the other path uses a triode Q1 and a triode Q2 to form a push-pull circuit to prevent signal cross distortion, a triode Q3 is used to detect the potential difference of the two paths of signals, finally, the operational amplifier AR2, a resistor R8 and a resistor R9 form a differential circuit to carry out differential processing on the signals, the wave limiting output circuit uses a resistor R11-resistor R13 and a triode Q6 to form a wave limiting circuit to limit the waveform and then input into the modulated analog, a compensation signal for the modulated analog signal is received by the controller.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a camera signal calibration system.
Background
In the prior art, a method and a system for processing a dual-camera signal (application number: 201711407334.0) disclose that the processing method includes: step 1, synchronously exposing a master camera and a slave camera; step 2, the output data with the ID number and the serial time signal, which are output by the main camera and the auxiliary camera, are transmitted to a signal multiplexing processor, the signal multiplexing processor acquires the data corresponding to the main camera and the auxiliary camera and the exposure process by identifying the ID number and the serial time signal, and the output data of the main camera and the auxiliary camera are transmitted to a back-end processor for multiplexing processing; and 3, receiving the multiplexed output data by the back-end processor, and processing the image. The two cameras are synchronously exposed, output data is provided with an ID number and a serial time signal, a signal multiplexing processor acquires an exposure process by identifying the ID number and the serial time signal, and the output data is transmitted to a back-end processor after being multiplexed, so that the back-end processor only needs to process the image of the frame of data;
compared with the prior art, the output data which is output by the main camera and the slave camera and has the ID number and the serial time signal is transmitted to the signal multiplexing processor, the signal multiplexing processor acquires the data corresponding to the main camera and the slave camera and the exposure process by identifying the ID number and the serial time signal, and the process of multiplexing and transmitting the output data of the main camera and the slave camera to the back-end processor does not consider the change of signal noise.
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 calibration system, which has the characteristics of ingenious design and humanized design, and can monitor the frequency of the modulated analog signal received by the controller in real time, and convert the modulated analog signal into a compensation signal for the modulated analog signal received by the controller after signal adjustment.
The technical scheme for solving the problem is that the camera signal calibration system comprises a controller, a video signal acquisition module, a signal transmission module, a signal correction 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 modulated analog signal frequency in the controller, the separation feedback circuit divides the signal into two paths of signals with the same frequency and different amplitudes by using a synchronous separation circuit consisting of a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5, one path of the signals is input into a noise reduction circuit consisting of an operational amplifier AR1, a diode D1 and a diode D2 to reduce the signal-to-noise ratio, the other path of the signals is used for preventing signal cross distortion by using a push-pull circuit consisting of a triode Q1 and a triode Q2, the potential difference of the two paths of signals is detected by using a triode Q3, finally, the operational amplifier AR2, a resistor R8 and a resistor R9 form a differential circuit to carry out differential processing on the signals, wherein a triode Q5 detects the potential difference between the inverting input end of the operational amplifier AR2 and the base of the triode Q4 to further adjust the signal amplitude, a wave limiting output circuit consists of a resistor R11-resistor R13 and a triode Q6, a compensation signal for the modulated analog signal is received by the controller.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. a synchronous separation circuit is formed by a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5, the signals are divided into two paths of signals with the same frequency and different amplitudes, the potential of an emitter of a triode Q4 can be adjusted by adjusting the resistance of a loop of a variable resistor RW1, one path of signals are input into a noise reduction circuit formed by an operational amplifier AR1, a diode D1 and a diode D2, disturbance signals are filtered by a diode D2, a diode D2 and a capacitor C6, the anti-interference performance of the signals is improved by reducing the signal-to-noise ratio, a push-pull circuit formed by a triode Q1 and a triode Q2 is used for preventing signal cross distortion, the potential difference of the two paths of signals is detected by a triode Q3, meanwhile, a triode Q3 feeds back signals to the anti-phase input end of an operational amplifier AR2, the amplitude of the;
2. the operational amplifier AR2, the resistor R8 and the resistor R9 form a differential circuit to perform differential processing on signals and stabilize a signal static working point, wherein the triode Q5 detects the potential difference between the reverse phase input end of the operational amplifier AR2 and the base electrode of the triode Q4, further adjusts the signal amplitude, can improve the accuracy of a compensation signal and ensure the consistency of the compensation signal and a modulated analog signal received by a controller, a wave limiting circuit consisting of the resistor R11, the resistor R13 and the triode Q6 is used for limiting the signal waveform and then inputting the signal into the modulated analog signal in the controller, a frequency selecting circuit consisting of the resistor R11, the resistor R13 and the capacitor C8 and the capacitor C10 is used for filtering abnormal frequencies, the triode Q6 is used for amplifying the signals to realize the wave limiting effect, the output signals are the compensation signals received by the controller, the signal noise ratio is reduced, and the signal distortion is prevented.
Drawings
Fig. 1 is a diagram of a separate feedback circuit of a camera signal calibration system according to the present invention.
Fig. 2 is a circuit diagram of a frequency acquisition circuit of a camera signal calibration system according to the present invention.
Fig. 3 is a circuit diagram of a limited-wave output circuit of a camera signal calibration system according to the present invention.
Detailed Description
The foregoing and other technical matters, features and effects 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 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
A camera signal calibration system comprises a frequency acquisition circuit, a separation feedback circuit and a wave-limiting output circuit, wherein the frequency acquisition circuit acquires the frequency of an analog signal modulated in a controller, the separation feedback circuit uses a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5 to form a synchronous separation circuit to divide the signal into two paths of signals with same frequency and different amplitudes, one path of signals is input into a noise reduction circuit consisting of an operational amplifier AR1, a diode D1 and a diode D2 to reduce the signal-to-noise ratio, a push-pull circuit consisting of two paths of triodes Q1 and Q2 is used to prevent signal cross distortion, a triode Q3 is used to detect the potential difference of the two paths of signals, and finally, the operational amplifier AR2, a resistor R8 and a resistor R9 form a differential circuit to carry out differential processing on the signals, wherein a triode Q5 detects the potential difference of the inverting input end of the operational amplifier AR 25 and the base of a triode, the wave-limiting output circuit uses a resistor R11-a resistor R13 and a triode Q6 to form a wave-limiting circuit to limit the waveform of a signal, then the wave-limiting circuit is input into a modulated analog signal in a controller, and a compensation signal of the modulated analog signal is received by the controller;
the separation feedback circuit uses a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5 to form a synchronous separation circuit to divide signals into two paths of signals with same frequency and different amplitudes, the potential of an emitter of the triode Q4 can be adjusted by adjusting the loop resistance of the variable resistor RW1, one path of signals are input into a noise reduction circuit consisting of an operational amplifier AR1, a diode D1 and a diode D2, a diode D2, a diode D2 and a capacitor C6 are used for filtering disturbance signals, the anti-interference performance of the signals is improved by reducing the signal-to-noise ratio, a push-pull circuit consisting of two paths of transistors Q1 and a transistor Q2 is used for preventing signal cross distortion, a triode Q3 is used for detecting the potential difference of the two paths of signals, meanwhile, the triode Q3 feeds back the signals into the reverse phase input end of the operational amplifier AR2, the amplitude of the operational amplifier AR2 is adjusted, and finally, the operational amplifier AR2, the, stabilizing the static working point of the signal, wherein the triode Q5 detects the potential difference between the inverting input end of the operational amplifier AR2 and the base electrode of the triode Q4, further adjusting the amplitude of the signal, improving the accuracy of the compensation signal and ensuring the consistency of the compensation signal and the analog signal received by the controller after modulation;
the specific structure of the said separation feedback circuit, the base of the triode Q1 connects the base of the triode Q2 and one end of the resistance R7, the capacitance C4, the capacitance C5, the other end of the resistance R7 connects to the ground, the collector of the triode Q1 connects to the power supply +5V, the emitter of the triode Q1 connects to the emitter of the triode Q2 and one end of the resistance R3, the collector of the triode Q2 connects to the ground, the other end of the resistance R3 connects to the collector of the triode Q3, the other end of the capacitance C3 connects to one end of the resistance R3, the other end of the resistance R3 connects to the emitter of the triode Q3, the base of the triode Q3 and one end of the capacitance C3, the positive pole of the diode D3, the non-phase input end of the operational amplifier AR 3 and the power supply +5V, the other end of the capacitance C3 connects to one end of the resistance R3, the other end of the resistance R3 connects to the base of the triode Q3, the collector of the, the other end of the resistor R4 and the other end of the variable resistor RW1 are grounded, the emitter of the triode Q3 is connected with the emitter of the triode Q5, the resistor R8, one end of the resistor R9 and the inverting input end of the operational amplifier AR2, the other end of the resistor R8 is grounded, the inverting input end of the operational amplifier AR1 is grounded, the output end of the operational amplifier AR1 is connected with the cathode of the diode D1, the cathode of the diode D2 and the other end of the capacitor C6, the anode of the diode D2 is connected with the base of the triode Q5 and the non-inverting input end of the operational amplifier AR2, the output end of the operational amplifier AR2 is connected with the other end of the resistor R9 and one end of the capacitor C7, and.
On the basis of the scheme, the wave-limiting output circuit utilizes a resistor R11-a resistor R13 and a triode Q6 to form a wave-limiting circuit to limit the waveform of a signal and then input the signal into a modulated analog signal in a controller, utilizes a resistor R11-a resistor R13 and a capacitor C8-a capacitor C10 to form a frequency selection circuit to filter abnormal frequency, utilizes a triode Q6 to amplify the signal to realize the wave-limiting function, outputs the signal which is a compensation signal of the modulated analog signal received by the controller to reduce the signal-to-noise ratio and prevent signal distortion, the base of the triode Q6 is connected with one end of a resistor R11, a capacitor C8 and the output end of an operational amplifier AR2, the emitter of the triode Q6 is connected with one end of the resistor R10, the other end of the resistor R373984 is grounded, the collector of the triode Q42 is connected with one end of a resistor R12, a resistor R14, one end of the capacitor C9 and a power supply +5V, the other end of the resistor R, the other end of the capacitor C8 is connected with one end of a resistor R13 and the other end of a capacitor C9, the other ends of the resistor R13 and the capacitor C10 are grounded, and the other end of the resistor R14 is connected with a signal output port;
the frequency acquisition circuit selects a frequency collector J1 of an SJ-ADC model to acquire the frequency of an analog signal modulated in the controller, a power supply end of a frequency collector J1 is connected with one end of a resistor R1, a grounding end of a frequency collector J1 is grounded, an output end of the frequency collector J1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with one end of a capacitor C1 and a capacitor C2 and one end of an inductor L1, the other ends of the resistor R1 and the capacitor C1 are connected with a power supply +5V, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is connected with one end of a capacitor C3 and the base of a triode Q1, and the other end of.
The invention relates to a camera signal calibration system, which comprises a frequency acquisition circuit, a separation feedback circuit and a wave-limiting output circuit, wherein the frequency acquisition circuit acquires the modulated analog signal frequency in a controller, the separation feedback circuit uses a synchronous separation circuit consisting of a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5 to divide the signal into two paths of signals with same frequency and different amplitudes, the size of the electric potential of an emitter of a triode Q4 can be adjusted by adjusting the loop resistance value of a variable resistor RW1, one path of the signals is input into a noise reduction circuit consisting of an operational amplifier AR1, a diode D1 and a diode D2, a diode D2, a diode D2 and a capacitor C6 are used for filtering disturbance signals, the anti-interference performance of the signal is improved by reducing the signal-to-noise ratio, the two paths of the circuits use a circuit consisting of a triode Q1 and a triode Q2 to prevent signal cross distortion, and use a triode Q3 to detect, meanwhile, a triode Q3 feeds back a signal to an inverting input end of an operational amplifier AR2, the amplitude of the output signal of the operational amplifier AR2 is adjusted, finally, a differential circuit consisting of the operational amplifier AR2, a resistor R8 and a resistor R9 performs differential processing on the signal, and a signal static working point is stabilized, wherein a triode Q5 detects the potential difference between the inverting input end of the operational amplifier AR2 and the base electrode of the triode Q4, the signal amplitude is further adjusted, the accuracy of a compensation signal can be improved, the consistency of the compensation signal and the analog signal after the controller receives the modulation is ensured, a wave limiting output circuit uses a resistor R11-a resistor R13 and a triode Q6 to form a wave limiting circuit to limit the waveform of the signal, then the signal is input into the analog signal after the controller receives the compensation signal of the analog signal after the.
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 (3)
1. A camera signal calibration system comprises a controller, a video signal acquisition module, a signal transmission module, a signal correction module and a display module, wherein the video signal acquisition module acquires video signals and transmits the video signals to the controller through the signal transmission module;
the frequency acquisition circuit acquires the frequency of an analog signal modulated in the controller, the separation feedback circuit divides the signal into two paths of signals with the same frequency and different amplitudes by using a synchronous separation circuit consisting of a triode Q4, a variable resistor RW1, a capacitor C4 and a capacitor C5, one path of the signals is input into a noise reduction circuit consisting of an operational amplifier AR1, a diode D1 and a diode D2 to reduce the signal-to-noise ratio, the other path of the signals is used for preventing signal cross distortion by using a push-pull circuit consisting of a triode Q1 and a triode Q2, the potential difference of the two paths of signals is detected by using a triode Q3, finally the operational amplifier AR2, a resistor R8 and a resistor R9 form a differential circuit to carry out differential processing on the signals, wherein the triode Q5 detects the potential difference between the inverting input end of the operational amplifier AR2 and the base 4 of the triode Q8 to further adjust the amplitude of the signals, a wave limiting output circuit consists of a resistor R11, a resistor R12, a resistor R36, receiving a compensation signal of the modulated analog signal for the controller;
the separating feedback circuit comprises a transistor Q1, the base of the transistor Q1 is connected with the base of a transistor Q2 and one end of a resistor R7, a capacitor C4 and one end of a capacitor C5, the other end of the resistor R7 is grounded, the collector of the transistor Q1 is connected with a power supply +5V, the emitter of the transistor Q1 is connected with the emitter of the transistor Q2 and one end of a resistor R2, the collector of the transistor Q2 is grounded, the other end of the resistor R2 is connected with the collector of the transistor Q2, the other end of the capacitor C2 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the emitter of the transistor Q2, the base of the transistor Q2 and one end of the capacitor C2, the anode of a diode D2, the non-inverting input end of the operational amplifier AR2 and the power supply +5V, the other end of the resistor R2 is connected with one end of the base of the transistor Q2, the collector of the resistor R2 is connected with the base of the transistor, the other end of the resistor R4 and the other end of the variable resistor RW1 are grounded, the emitter of the triode Q3 is connected with the emitter of the triode Q5, the resistor R8, one end of the resistor R9 and the inverting input end of the operational amplifier AR2, the other end of the resistor R8 is grounded, the inverting input end of the operational amplifier AR1 is grounded, the output end of the operational amplifier AR1 is connected with the cathode of the diode D1, the cathode of the diode D2 and the other end of the capacitor C6, the anode of the diode D2 is connected with the base of the triode Q5 and the non-inverting input end of the operational amplifier AR2, the output end of the operational amplifier AR2 is connected with the other end of the resistor R9 and one end of the capacitor C7, and.
2. The camera signal calibration system of claim 1, wherein the wave-limiting output circuit comprises a transistor Q6, a base of the transistor Q6 is connected to a resistor R11, one end of a capacitor C8 and an output end of an operational amplifier AR2, an emitter of the transistor Q6 is connected to one end of a resistor R10, the other end of the resistor R10 is grounded, a collector of the transistor Q6 is connected to a resistor R12, a resistor R14, one end of a capacitor C9 and a power supply +5V, the other end of the resistor R11 is connected to the other end of the resistor R12 and one end of a capacitor C10, the other end of the capacitor C8 is connected to one end of a resistor R13 and the other end of a capacitor C9, the other ends of the resistor R13 and the capacitor C10 are grounded, and the other end of the resistor R14 is connected.
3. The camera signal calibration system of claim 1, wherein the frequency acquisition circuit comprises a frequency collector J1 with model number SJ-ADC, a power terminal of the frequency collector J1 is connected to one end of a resistor R1, a ground terminal of the frequency collector J1 is connected to ground, an output terminal of the frequency collector J1 is connected to one end of a resistor R2, the other end of the resistor R2 is connected to one end of a capacitor C1, one end of a capacitor C2 and one end of an inductor L1, the other ends of the resistor R1 and the capacitor C1 are connected to +5V, the other end of the capacitor C2 is connected to ground, the other end of the inductor L1 is connected to one end of a capacitor C3 and a base of a transistor Q1, and the other end of the capacitor C3 is.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111181514A (en) * | 2020-02-29 | 2020-05-19 | 李韬 | Signal calibration device of medical endoscope |
| CN111157778B (en) * | 2020-02-29 | 2021-11-23 | 国网河南省电力公司信息通信公司 | Electric power communication signal synchronous detection circuit |
| CN111181513B (en) * | 2020-02-29 | 2023-02-21 | 国网河南省电力公司信息通信公司 | Data security transmission circuit |
| 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 |
| CN113395414B (en) * | 2021-06-15 | 2022-11-11 | 杭州海康机器人股份有限公司 | Waveform recovery circuit and industrial camera |
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