CN113347411B - Analog camera connection detection method and device - Google Patents
Analog camera connection detection method and device Download PDFInfo
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- CN113347411B CN113347411B CN202110605230.0A CN202110605230A CN113347411B CN 113347411 B CN113347411 B CN 113347411B CN 202110605230 A CN202110605230 A CN 202110605230A CN 113347411 B CN113347411 B CN 113347411B
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Abstract
The invention discloses a method and a device for detecting connection of an analog camera. Wherein, the method comprises the following steps: acquiring an analog video signal output by an analog camera, wherein the analog video signal is a signal generated by a picture acquired by the analog camera; comparing the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result; and determining that the connection between the analog camera and the rear end is normal or that the connection between the analog camera and the rear end is abnormal according to the detection result of the video signal connection condition. The invention solves the technical problem of low detection efficiency of the connection of the analog camera.
Description
Technical Field
The invention relates to the field of hardware detection, in particular to a method and a device for detecting connection of an analog camera.
Background
In the prior art, if it is detected whether the connection between the analog camera and the back end background is abnormal, usually when the analog camera is installed, a worker is specially arranged to check whether the analog camera takes a normal image in the monitoring room, and then the worker communicates with the installer who is installing through the communication device to inform the installer that the analog camera is installed or is installed abnormally, or the installer moves to the monitoring room to check after installation, and then if the analog camera is not installed, the installer still needs to move to the installation position to install again.
That is, in the related art, the efficiency of installing the analog camera is low.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting connection of an analog camera, which at least solve the technical problem of low detection efficiency of the connection of the analog camera.
According to an aspect of an embodiment of the present invention, there is provided an analog camera connection detection method, including: acquiring an analog video signal output by an analog camera, wherein the analog video signal is a signal generated by a picture acquired by the analog camera; comparing the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result; and determining that the connection between the analog camera and the rear end is normal or that the connection between the analog camera and the rear end is abnormal according to the detection result of the video signal connection condition.
According to another aspect of the embodiments of the present invention, there is also provided an analog camera connection detection apparatus, including: the device comprises an acquisition unit, a processing unit and a display unit, wherein the acquisition unit is used for acquiring an analog video signal output by an analog camera, and the analog video signal is a signal generated by a picture acquired by the analog camera; the comparison unit is used for comparing the analog video signal with the preset reference voltage of the analog camera to obtain a video signal connection condition detection result; and the determining unit is used for determining that the connection between the analog camera and the rear end is normal or the connection between the analog camera and the rear end is abnormal according to the detection result of the video signal connection condition.
As an example, the apparatus further includes: a prompting unit, configured to prompt a first prompt message when the connection between the analog camera and the back end is normal after determining that the connection between the analog camera and the back end is normal or that the connection between the analog camera and the back end is abnormal according to the detection result of the video signal connection condition; and prompting a second prompting message under the condition that the connection between the analog camera and the rear end is abnormal.
As an example, the apparatus further includes: a receiving unit, configured to receive an adjustment signal before comparing the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result, where the adjustment signal is used to adjust a resolution of the analog camera; the processing unit is used for suspending comparison between the analog video signal and a preset reference voltage of the analog camera; an adjusting unit for adjusting the resolution of the analog camera in response to the adjustment signal; and the comparison unit is used for reacquiring the analog video signal after the resolution of the analog camera is adjusted, and comparing the reacquired analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result.
In the embodiment of the invention, an analog video signal output by an analog camera is acquired, wherein the analog video signal is a signal generated by a picture collected by the analog camera; comparing the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result; according to the video signal connection condition detection result, the method for determining whether the connection between the analog camera and the rear end is normal or the connection between the analog camera and the rear end is abnormal is adopted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of an application environment of an alternative analog camera connection detection method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram of an alternative analog camera connection detection method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of connection detection for an alternative method of analog camera connection detection according to embodiments of the present invention;
FIG. 4 is a connection detection block diagram of an alternative analog camera connection detection method according to an embodiment of the present invention;
FIG. 5 is a topological diagram illustrating connection anomaly of an alternative analog camera connection detection method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a normal topology of a connection for an alternative method of detecting connection of an analog camera according to an embodiment of the present invention;
FIG. 7 is a signal waveform diagram illustrating an alternative analog camera connection detection method according to an embodiment of the present invention;
FIG. 8 is a schematic flow chart diagram of an alternative analog camera connection detection method in accordance with embodiments of the present invention;
FIG. 9 is a schematic flow chart diagram of an alternative analog camera connection detection method in accordance with embodiments of the present invention;
fig. 10 is a schematic structural diagram of an alternative analog camera connection detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an aspect of the embodiments of the present invention, there is provided a method for simulating abnormal camera connection, which may be, but is not limited to, applied to the environment shown in fig. 1 as an optional implementation manner.
As shown in fig. 1, the analog camera 102 is connected to the backend/DVR 106 through the video line 104, and if the data line is cut short or the signal between the analog camera 102 and the background 106 is not connected, the background cannot acquire the picture shot by the analog camera. Therefore, a convenient and fast method is needed to detect whether the communication between the analog camera and the background is normal at any time. In the embodiment of the application, a detection device 108 may be arranged inside the analog camera 102, the detection device 108 acquires an analog video signal output by the analog camera, and compares the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result; and determining whether the analog camera is normally connected with the rear end or not according to the detection result of the video signal connection condition. Therefore, whether the connection between the camera and the background is normal or not is accurately and efficiently determined.
As an alternative implementation, as shown in fig. 2, the method for simulating abnormal camera connection includes:
s202, acquiring an analog video signal output by an analog camera, wherein the analog video signal is a signal generated by a picture acquired by the analog camera;
s204, comparing the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result;
and S206, determining that the connection between the analog camera and the rear end is normal or abnormal according to the detection result of the video signal connection condition.
Alternatively, the above-described analog camera connection detection method may be applied, but not limited, to an analog monitoring system. As shown in fig. 3, the analog cameras in each scene can capture pictures, transmit the video pictures to the video recorder DVR through the 0-hundred meter analog video transmission line, and connect to the monitor display through the VGA or HDMI interface for playing. The detection device 302 of the embodiment is connected behind the analog camera, and the detection device 302 can detect the on-off condition of the analog camera in real time.
Taking a scene of installing the analog camera as an example, in the process of installing the analog camera, a worker usually needs to check whether the shooting capability of the analog camera is normal or not and whether the connection is normal or not at the display after connecting each line of the analog camera and adjusting each parameter of the analog camera. However, since the position of the analog camera is far from the position of the display, such as an analog camera for theft prevention in a cell, a worker needs to move back and forth between the analog camera and the display to check whether the connection is normal or a worker waits in front of the display, installs the analog camera by the worker, in that the worker communicates to check whether the connection is normal. In the embodiment of the application, the analog camera can be directly installed by a worker, and after the analog camera is installed, whether the analog camera is normally connected or not can be directly checked by checking whether the alarm information exists or not. If the analog camera is abnormally connected, an alarm signal is sent, such as a flashing indicator light or a voice prompt, or a message is sent to a mobile phone of a worker. The installation efficiency is improved. The connection condition of the analog camera can also be prompted, for example, the connection is prompted to be normal or abnormal, the connection mode can be a voice prompt or the prompt of the indicator light, or a message prompt is sent to the mobile phone.
Taking the anti-theft as an example, if a lawbreaker destroys the camera, if the camera data transmission line is cut short, the lawbreaker detects the abnormal connection and immediately sends the alarm information, thereby giving an alarm. If the simulation camera is installed, whether the connection is normal or not can be checked in real time in the installation process, if the connection is normal or abnormal, the connection condition does not need to be checked in a monitoring room, and the efficiency is improved.
As an alternative example, comparing the analog video signal with a preset reference voltage of the analog camera to obtain the video signal connection condition detection result includes:
taking an analog video signal as first input data, and taking a preset reference voltage as second input data;
and inputting the first input data and the second input data into the detection module to obtain a video signal connection condition detection result output by the detection module.
As an alternative example, inputting the first input data and the second input data into the detection module, and obtaining the detection result of the connection condition of the video signal output by the detection module includes:
under the condition that the voltage of the analog video signal is greater than the preset reference voltage, the detection result of the video signal connection condition output by the detection module is a low level;
and under the condition that the voltage of the analog video signal is less than the preset reference voltage, the detection result of the video signal connection condition output by the detection module is a high level.
As an alternative example, determining that the connection between the analog camera and the back end is normal or that the connection between the analog camera and the back end is abnormal according to the detection result of the video signal connection condition includes:
determining that the connection between the analog camera and the rear end is abnormal under the condition that the detection result of the video signal connection condition comprises a periodic synchronous head signal;
and determining that the connection between the analog camera and the back end is normal under the condition that the video signal connection condition detection result does not include the periodic synchronous head signal.
As an optional example, after determining that the connection between the analog camera and the back end is normal or that the connection between the analog camera and the back end is abnormal according to the detection result of the video signal connection condition, the method further includes:
under the condition that the connection between the analog camera and the rear end is normal, prompting a first prompt message;
and prompting a second prompt message under the condition that the connection between the analog camera and the rear end is abnormal.
As an alternative example, before comparing the analog video signal with the preset reference voltage of the analog camera to obtain the video signal connection condition detection result, the method further includes:
receiving an adjustment signal, wherein the adjustment signal is used for adjusting the resolution of the analog camera;
suspending comparing the analog video signal with a preset reference voltage of the analog camera;
adjusting the resolution of the analog camera in response to the adjustment signal;
and after the resolution ratio of the analog camera is adjusted, acquiring the analog video signal again, and comparing the acquired analog video signal with the preset reference voltage of the analog camera to obtain a video signal connection condition detection result.
Optionally, in this embodiment of the application, the detection device may also be installed inside the analog camera. Fig. 4 is a system block diagram of the present embodiment. As shown in fig. 4, the analog camera mainly includes an image Sensor (Sensor), an image processing unit (ISP), an analog video modulation unit (TX), a control unit (CPU), and a series termination resistor R1 (transmission system 75R, in general, R1 takes 75R). The video recorder (DVR) is internally provided with a terminating resistor R2 (generally taking the value of 75R), an analog video demodulator (RX), and other modules (which may include a storage device, a processor, a hard disk, etc.). The analog video signal is a time-continuous analog signal carrying video content and comprises a video effective area, a video blanking area and a synchronization area.
"analog video link monitoring unit": and the control unit samples and processes the analog video signal from the video output side of the analog camera and feeds the processed signal back to the analog camera.
"indicating, warning unit": the analog camera control unit executes video signal detection logic to obtain a judgment result, and outputs the result of 'video link connection is normal' or 'video link connection is abnormal' to the outside.
The topologies of the two cases of "normal video link connection" and "abnormal video link connection" are shown in fig. 5 and 6. In fig. 5, point U1 is a disconnection point, and a signal cannot be transmitted from U1 to a backend or decoding end or DVR. In fig. 6, the signal is transmitted normally.
As shown in fig. 5 and 6, R1 and R2 generally have a resistance of 75 Ω, and Rx generally has a very small transmission line impedance of several Ω. The analog video signal output by the analog camera in the working process, the waveforms input and output by the analog camera through the analog video link monitoring unit under the conditions of normal video link connection and abnormal video link connection are shown in fig. 7. When the video link connection of the analog camera is abnormal, the analog video waveform acquired by the analog video link monitoring unit is shown as a waveform II in FIG. 7.
When the analog camera is in the "normal video link connection", the link is connected to the terminating resistor R2, so the analog video waveform obtained by the "analog video link monitoring unit" is as shown in the waveform (R) of fig. 7.
The Vref + Vref-voltage interval shown by waveform r in fig. 7 determines a suitable Vref value. The Vref value is a reference voltage value, and the analog video link monitoring unit outputs a waveform (c) and a waveform (c) according to the waveform (c) and the waveform (c).
That is, if the pulse signal value is greater than the reference voltage value in the waveform diagram in the analog video signal, the pulse signal value is adjusted to a low voltage value, and the portion higher than Vref in the waveform of (c) in fig. 7 is adjusted to a low voltage portion in the waveform of (c). The pulses below the reference voltage level are adjusted to a high voltage level, such as the high voltage portion of waveform c.
If the adjusted oscillogram is a regularly changed waveform as shown in the waveform III, the abnormal connection of the camera can be judged because the pulse values of the video part in the analog video signal of the camera are all larger than the reference voltage value. If the adjusted waveform is irregular as shown by pulse, the camera is normally connected. Because the value of the video portion of the analog video signal is mostly smaller than or equal to the reference voltage value.
The flowchart may be as shown in steps S802 to S806 of fig. 8. A reference voltage value is determined. The product design stage can determine a reference voltage value between Vref-and Vref + according to a video signal, a transmission requirement and a hardware circuit. The analog camera monitors whether the pulse interval T output by the detection unit is within a reasonable range from M-lambda to M + lambda or not at a video effective interval. If the pulse intervals of the continuous A times are not in a reasonable range, the link connection is considered to be normal, otherwise, the link connection is considered to be abnormal. The specific flowchart may be as shown in step S902 to step S916 of fig. 9.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
According to another aspect of the embodiments of the present invention, there is also provided an analog camera connection detection apparatus for implementing the above-described analog camera connection detection method. As shown in fig. 10, the apparatus includes:
an acquiring unit 1002, configured to acquire an analog video signal output by an analog camera, where the analog video signal is a signal generated by a picture acquired by the analog camera;
a comparing unit 1004, configured to compare the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result;
the determining unit 1006 is configured to determine that the connection between the analog camera and the back end is normal or that the connection between the analog camera and the back end is abnormal according to the detection result of the video signal connection condition.
Alternatively, the above-described analog camera connection detection method may be applied, but not limited, to an analog monitoring system. As shown in fig. 3, the analog cameras in each scene can capture pictures, transmit the video pictures to the video recorder DVR through the 0-hundred meter analog video transmission line, and connect to the monitor display through the VGA or HDMI interface for playing. The detection device 302 of the embodiment is connected behind the analog camera, and the detection device 302 can detect the on-off condition of the analog camera in real time.
Taking a scene of installing the analog camera as an example, in a process of installing the analog camera, a worker usually needs to check whether shooting capability of the analog camera is normal or not and whether connection is normal or not at a display after connecting each line of the analog camera and adjusting each parameter of the analog camera. However, since the position of the analog camera is far from the position of the display, such as an analog camera for theft prevention in a cell, a worker needs to move back and forth between the analog camera and the display to check whether the connection is normal or a worker waits in front of the display, installs the analog camera by the worker, in that the worker communicates to check whether the connection is normal. In the embodiment of the application, the analog camera can be directly installed by a worker, and after the analog camera is installed, whether the analog camera is normally connected or not can be directly checked by checking whether the alarm information exists or not. If the analog camera is abnormally connected, an alarm signal is sent, such as a flashing indicator light or a voice prompt, or a message is sent to a mobile phone of a worker. The installation efficiency is improved. The connection condition of the analog camera can also be prompted, for example, the connection is prompted to be normal or abnormal, the connection mode can be a voice prompt or the prompt of the indicator light, or a message prompt is sent to the mobile phone.
Taking the anti-theft as an example, if a lawbreaker destroys the camera, if the camera data transmission line is cut short, the lawbreaker detects the abnormal connection and immediately sends the alarm information, thereby giving an alarm. If the simulation camera is installed, whether the connection is normal or not can be checked in real time in the installation process, if the connection is normal or abnormal, the connection condition does not need to be checked in a monitoring room, and the efficiency is improved.
For other examples of this embodiment, please refer to the above examples, which are not described herein again.
The integrated unit in the above embodiments, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in the above computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be substantially or partially implemented in the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and including instructions for causing one or more computer devices (which may be personal computers, servers, or network devices) to execute all or part of the steps of the method according to the embodiments of the present invention.
In the above embodiments of the present invention, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described in detail in a certain embodiment.
In the several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. An analog camera connection detection method, comprising:
acquiring an analog video signal output by an analog camera, wherein the analog video signal is a signal generated by a picture collected by the analog camera;
taking the analog video signal as first input data, and taking a preset reference voltage as second input data;
inputting the first input data and the second input data into a detection module to obtain a video signal connection condition detection result output by the detection module;
under the condition that the voltage of the analog video signal is greater than the preset reference voltage, the detection result of the video signal connection condition output by the detection module is a low level;
under the condition that the voltage of the analog video signal is smaller than the preset reference voltage, the detection result of the video signal connection condition output by the detection module is a high level;
determining that the connection between the analog camera and the rear end is abnormal under the condition that the video signal connection condition detection result comprises a periodic synchronous head signal;
and determining that the connection between the analog camera and the back end is normal under the condition that the video signal connection condition detection result does not include the periodic synchronous head signal.
2. The method of claim 1, further comprising:
under the condition that the connection between the analog camera and the rear end is normal, prompting a first prompting message;
and prompting a second prompt message under the condition that the connection between the analog camera and the rear end is abnormal.
3. The method of claim 1, wherein prior to inputting the first input data and the second input data into a detection module, the method further comprises:
receiving an adjustment signal, wherein the adjustment signal is used for adjusting the resolution of the analog camera;
suspending comparing the analog video signal with a preset reference voltage of the analog camera;
adjusting the resolution of the analog camera in response to the adjustment signal;
and after the resolution ratio of the analog camera is adjusted, acquiring the analog video signal again, and comparing the acquired analog video signal with the preset reference voltage of the analog camera to obtain the video signal connection condition detection result.
4. An analog camera connection detection device, comprising:
the device comprises an acquisition unit, a processing unit and a display unit, wherein the acquisition unit is used for acquiring an analog video signal output by an analog camera, and the analog video signal is a signal generated by a picture collected by the analog camera;
the comparison unit is used for comparing the analog video signal with a preset reference voltage of the analog camera to obtain a video signal connection condition detection result;
the determining unit is used for determining that the connection between the analog camera and the rear end is normal or the connection between the analog camera and the rear end is abnormal according to the detection result of the video signal connection condition;
wherein the comparing unit includes:
the first determining module is used for taking the analog video signal as first input data and taking the preset reference voltage as second input data;
the input module is used for inputting the first input data and the second input data into the detection module to obtain a detection result of the video signal connection condition output by the detection module;
wherein the input module comprises:
the first output submodule is used for outputting a detection result of the connection condition of the video signal output by the detection module to be a low level under the condition that the voltage of the analog video signal is greater than the preset reference voltage;
the second output submodule is used for outputting a video signal connection condition detection result which is a high level and is output by the detection module under the condition that the voltage of the analog video signal is smaller than the preset reference voltage;
wherein the determination unit includes:
a second determining module, configured to determine that the connection between the analog camera and the backend is abnormal when the detection result of the video signal connection condition includes a periodic synchronization header signal;
and a third determining module, configured to determine that the connection between the analog camera and the backend is normal when the video signal connection detection result does not include the periodic synchronization header signal.
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|---|---|---|---|---|
| CN103414933A (en) * | 2013-07-29 | 2013-11-27 | 华为技术有限公司 | Analog video signal output device and electronic device |
| CN106303514A (en) * | 2016-09-08 | 2017-01-04 | 珠海全志科技股份有限公司 | Analog video interface testing circuit and detection method, integrated chip |
| CN108259804A (en) * | 2016-12-29 | 2018-07-06 | 扬智科技股份有限公司 | Video output system and its cohered video compensation method |
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| JP2005094399A (en) * | 2003-09-18 | 2005-04-07 | Ricoh Co Ltd | Digital video encoder device |
| JP4241847B2 (en) * | 2007-03-15 | 2009-03-18 | セイコーエプソン株式会社 | Television connection detection device and image display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414933A (en) * | 2013-07-29 | 2013-11-27 | 华为技术有限公司 | Analog video signal output device and electronic device |
| CN106303514A (en) * | 2016-09-08 | 2017-01-04 | 珠海全志科技股份有限公司 | Analog video interface testing circuit and detection method, integrated chip |
| CN108259804A (en) * | 2016-12-29 | 2018-07-06 | 扬智科技股份有限公司 | Video output system and its cohered video compensation method |
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