CN110225284B - Coaxial power supply method, device and system - Google Patents
Coaxial power supply method, device and system Download PDFInfo
- Publication number
- CN110225284B CN110225284B CN201810175906.5A CN201810175906A CN110225284B CN 110225284 B CN110225284 B CN 110225284B CN 201810175906 A CN201810175906 A CN 201810175906A CN 110225284 B CN110225284 B CN 110225284B
- Authority
- CN
- China
- Prior art keywords
- power supply
- video
- signal
- transmission line
- coaxial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The application provides a coaxial power supply method, a device and a system, wherein the system comprises video analysis equipment, a POC relay, POC powered equipment and video source equipment, wherein the video analysis equipment is used for transmitting a power supply signal to the POC relay through a first transmission line; the POC relay is used for boosting the power supply signal and transmitting the boosted power supply signal to the POC powered device through a second transmission line; the POC powered device is used for separating the power supply signal from the second transmission line and transmitting the power supply signal to the video source device; the video source equipment is used for transmitting a video signal to the POC powered equipment after being electrified; the POC powered device is also used for receiving the video signal transmitted by the video source device and transmitting the video signal to the POC relay through the second transmission line; POC relaying is also used to separate the video signal from the second transmission line and send it to the video parsing device over the first transmission line. The method can expand the application scene of the POC scheme.
Description
Technical Field
The present application relates to video surveillance technologies, and in particular, to a method, an apparatus, and a system for coaxial power supply.
Background
The POC (Power Over coax) technology superimposes Power, video and control signals on one line for transmission, and solves the problems of Power supply, video transmission, control and the like of a front-end camera. However, since the receivable power of the front-end camera is not only related to the output power of the POC, but also related to the quality and length of the transmission line, the resistance on the transmission line becomes larger as the length of the transmission line increases, and the larger the resistance, the larger the loss, and the smaller the receivable power of the front-end camera, the distance between the video analysis device and the front-end camera in the existing POC scheme cannot be too large, which limits the application scenarios of the POC scheme.
Disclosure of Invention
In view of the above, the present application provides a coaxial power supply method, apparatus and system.
Specifically, the method is realized through the following technical scheme:
according to a first aspect of the embodiments of the present application, there is provided a coaxial power supply system, including a video analysis device, a coaxial power supply relay device, a coaxial power supply powered device, and a video source device, the video analysis device is connected to the coaxial power supply relay device through a first transmission line, the coaxial power supply relay device is connected to the coaxial power supply powered device through a second transmission line: wherein:
the video analysis equipment is used for transmitting a power supply signal to the coaxial power supply relay equipment through the first transmission line;
the coaxial power supply relay equipment is used for separating a power supply signal from the first transmission line, boosting the power supply signal and transmitting the boosted power supply signal to the coaxial power supply powered equipment through the second transmission line;
the coaxial power supply powered device is used for separating a power supply signal from the second transmission line and transmitting the power supply signal to the video source device;
the video source equipment is used for transmitting a video signal to the coaxial power supply powered equipment after being electrified;
the coaxial power supply powered device is also used for receiving the video signal transmitted by the video source device and transmitting the video signal to the coaxial power supply relay device through the second transmission line;
the coaxial power supply relay equipment is also used for separating a video signal from the second transmission line and sending the video signal to the video analysis equipment through the first transmission line;
the video analysis equipment is also used for separating the video signals from the first transmission line and carrying out video analysis processing.
Optionally, the coaxial power supply relay device includes: the video processing device comprises a boosting processing module, a first superposition module and a signal processing module, wherein the boosting processing module and the first superposition module are arranged on a power path, and the signal processing module is arranged on a video path; wherein:
the boosting processing module is used for boosting the received power supply signal transmitted by the video analysis equipment;
the first superposition module is used for transmitting the power supply signal subjected to the boosting processing by the boosting module to the coaxial power supply powered equipment through a second transmission line;
the first superposition module is further used for blocking the video signal on a power supply path;
the signal processing module is used for compensating and amplifying the received video signal so as to enhance the signal amplitude, and transmitting the processed video signal to the video analysis equipment through the first transmission line.
Optionally, the signal processing module includes: the video amplifier comprises a first blocking capacitor, a level shift circuit, a video operational amplifier and a second blocking capacitor; wherein:
the first blocking capacitor is used for blocking a direct-current power supply signal;
the level shift circuit is used for converting the AC coupled video signal processed by the first blocking capacitor into a DC coupled signal;
the video operational amplifier is used for compensating and amplifying the video signal processed by the level shift circuit;
and the second blocking capacitor is used for blocking a direct-current power supply signal.
Optionally, the power receiving apparatus for coaxial power supply includes: the second superposition module and the direct-current high-low voltage conversion module are arranged on the power path, and the third blocking capacitor is arranged on the video path; wherein:
the second superposition module is used for blocking the video signal on a power supply path;
the direct-current high-low voltage conversion module is used for converting the voltage of the received direct-current power supply signal into a specified voltage;
and the third blocking capacitor is used for blocking a direct-current power supply signal.
Optionally, the coaxial power supply powered device and the video source device are deployed in a merged manner; or, the coaxial power supply powered device and the video source device are deployed independently.
Optionally, the video source device is a high-definition analog camera.
According to a second aspect of the embodiments of the present application, there is provided a coaxial power supply relay device, including a boost processing module and a first superimposing module disposed on a power supply path, and a signal processing module disposed on a video path; wherein:
the boosting processing module is used for boosting the received power supply signal transmitted by the video analysis equipment;
the first superposition module is used for transmitting the power supply signal subjected to the boosting processing by the boosting module to the coaxial power supply powered equipment through a second transmission line;
the first superposition module is further used for blocking the video signal on a power supply path;
the signal processing module is used for compensating and amplifying the received video signal so as to enhance the signal amplitude, and transmitting the processed video signal to the video analysis equipment through the first transmission line.
Optionally, the signal processing module includes: the video amplifier comprises a first blocking capacitor, a level shift circuit, a video operational amplifier and a second blocking capacitor; wherein:
the first blocking capacitor is used for blocking a direct-current power supply signal;
the level shift circuit is used for converting the AC coupled video signal into a DC coupled signal;
and the video operational amplifier is used for compensating and amplifying the video signal processed by the level shift circuit.
According to a third aspect of embodiments of the present application, there is provided a power receiving apparatus for coaxial power supply, including: the second superposition module and the direct-current high-low voltage conversion module are arranged on the power path, and the third blocking capacitor is arranged on the video path; wherein:
the second superposition module is used for blocking the video signal on a power supply path;
the direct-current high-low voltage conversion module is used for converting the voltage of the received direct-current power supply signal into a specified voltage;
and the third blocking capacitor is used for blocking a direct-current power supply signal.
Optionally, the coaxial power supply powered device and the video source device are deployed in a merged manner; or the coaxial power supply powered device and the video source device are deployed independently.
According to a fourth aspect of the embodiments of the present application, there is provided a coaxial power supply method applied to a coaxial power supply system including a video parsing apparatus, a coaxial power supply relay apparatus, a coaxial power supply powered apparatus, and a video source apparatus, wherein the video parsing apparatus is connected to the coaxial power supply relay apparatus via a first transmission line, and the coaxial power supply relay apparatus is connected to the coaxial power supply powered apparatus via a second transmission line, the method including:
the coaxial power supply relay device separates a power supply signal from a first transmission line;
the coaxial power supply relay equipment boosts the power supply signal and transmits the boosted power supply signal to the coaxial power supply powered equipment through the second transmission line;
the coaxial power supply powered device separates a power supply signal from the second transmission line and transmits the power supply signal to the video source device;
after the video source equipment is powered on and works, transmitting a video signal to the coaxial power supply powered equipment;
the coaxial power supply powered equipment receives the video signal transmitted by the video source equipment and transmits the video signal to the coaxial power supply relay equipment through the second transmission line;
the coaxial power supply relay equipment separates out a video signal from the second transmission line and sends the video signal to the video analysis equipment through the first transmission line;
and the video analysis equipment separates out video signals from the first transmission line and carries out video analysis processing.
According to the coaxial power supply system, the coaxial power supply relay equipment is arranged between the video analysis equipment and the video source equipment, the power supply signal provided by the coaxial power supply relay equipment is boosted and provided for the video source equipment, the distance limit between the video analysis equipment and the front-end camera in the POC scheme is weakened, the flexibility of construction and wiring of the POC scheme is improved, and the application scene of the POC scheme is expanded.
Drawings
Fig. 1 is a schematic diagram of an architecture of a coaxial power supply system according to an exemplary embodiment of the present application;
fig. 2 is a schematic diagram of a POC relay according to an exemplary embodiment of the present application;
fig. 3 is a schematic diagram of a POC relay according to another exemplary embodiment of the present application;
fig. 4 is a schematic structural diagram of a POC powered device according to an exemplary embodiment of the present application;
FIG. 5 is a schematic diagram of a level shifting circuit shown in an exemplary embodiment of the present application;
FIG. 6 is a schematic diagram of a video op-amp shown in an exemplary embodiment of the present application;
fig. 7 is a schematic flow chart illustrating a coaxial power supply method according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In order to make the technical solutions provided in the embodiments of the present application better understood and make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, which is a schematic structural diagram of a coaxial power supply system according to an embodiment of the present disclosure, as shown in fig. 1, the coaxial power supply system may include a video parsing device 110, a coaxial power supply relay device (POC relay for short) 120, a POC powered device 130, and a video source device 140; the video parsing device 110 and the POC relay 120 are connected by a first transmission line 150, and the POC relay 120 and the POC powered device 130 are connected by a second transmission line 160. Wherein:
a video parsing device 110 for transmitting a power signal to the POC relay 120 over a first transmission line 150;
POC powered device 130 for separating the power signal from second transmission line 160 and transmitting it to video source device 140;
a video source device 140, configured to transmit a video signal to the POC powered device 130 after power-on operation;
POC powered device 130, further configured to receive the video signal transmitted by video source device 140, and transmit the video signal to POC relay 120 through second transmission line 160;
the video parsing device 110 is further configured to separate the video signal from the first transmission line 150 and perform video parsing processing.
In the embodiment of the present application, in order to solve the above limitation, a POC relay may be disposed between the video analysis device and the front-end terminal, and the POC relay may perform a voltage boosting process on a power signal provided by the video analysis device, so as to reduce loss of the power signal on a transmission path, extend a transmission distance of the power signal, and further expand an application scenario of the POC scheme.
Accordingly, in the embodiment of the present application, the POC relay 120 is disposed between the video resolution device 110 and the video source device 140 in the coaxial power supply system, and the POC relay 120 is configured to boost a power signal provided by the video resolution device 110, provide the boosted power signal to the video source device 140, and transmit a video signal sent by the video source device 140 to the video resolution device 110.
The power signal provided by the video analytics device 110 may include, but is not limited to, a 48V or 12V dc power signal.
In this embodiment, POC relay 120 may transmit a power signal to POC powered device 130 via second transmission line 160; after receiving the power signal, POC powered device 130 may transmit it to video source device 140.
After video source 140 is powered on, it may transmit a video signal to POC powered device 130; after receiving the video signal, POC powered device 130 may transmit the video signal to POC relay 120 over second transmission line 160.
After the POC relay 120 receives the video signal, it may be transmitted to the video parsing device 110 over the first transmission line 150.
As can be seen, in the coaxial power supply system shown in fig. 1, the first transmission line 150 not only transmits the power signal, but also superimposes the video signal, wherein the video signal is transmitted from the POC relay 120 to the video resolution device 110; the power signal is transmitted by video parsing device 110 towards POC relay 120.
The second transmission line 160 not only transmits the video signal, but also superimposes the power signal, so that the POC repeater 120 supplies power to the POC powered device 130, and further supplies power to the video source device 140; wherein the video signal is transmitted from POC powered device 130 to POC relay 120; the power signal is transmitted by POC relay 120 in the direction of POC powered device 130.
Accordingly, in the embodiment of the present application, on one hand, the POC relay 120 needs to separate the power signal from the first transmission line 150, perform the boosting process, and transmit the power signal to the POC powered module 130; POC relay 120, on the other hand, needs to separate the video signal from second transmission line 160 and transmit it to video parsing device 110; POC powered device 130 may need to separate the power signal from the second transmission line and transmit it to video source device 110.
Therefore, in the embodiment of the application, the POC relay for boosting the power supply signal provided by the video analysis equipment is arranged between the video analysis equipment and the video source equipment, so that the transmission distance of the POC link is effectively prolonged, the wiring is more flexible in construction, and the application scene of the POC scheme is expanded.
In one embodiment of the present application, the POC powered device 130 and the video source device 140 may be deployed in a merged manner, i.e., the POC powered device 130 may be a part of the video source device 140.
In this embodiment, video source device 140 may be a POC-enabled analog camera, such as a POC-enabled high definition analog camera.
In another embodiment of the present application, POC powered device 130 and video source device 140 may also be deployed independently of each other.
In this embodiment, video source device 140 may not need to support POC functionality, i.e. it may be a normal analog camera, such as a high definition analog camera.
It is noted that in this embodiment, POC powered device 130 may be deployed at a relatively close distance from video source device 140.
As can be seen, in this embodiment, by separating the POC powered device from the video source device, the entire system can be connected to both the analog camera supporting the POC function and the general analog camera (i.e., the analog camera not supporting the POC function), and the application scenarios of the POC scheme are expanded.
Referring to fig. 2, in an embodiment of the present application, the POC relay 120 may include: a boost processing module 121 and a first superimposing module 122 provided on the power path, and a signal processing module 123 provided on the video path; wherein:
a voltage boosting processing module 121, configured to perform voltage boosting processing on the received power signal transmitted by the video parsing device 110;
the first superposition module 122 is configured to transmit the power signal after the voltage boosting processing by the voltage boosting module 121 to the POC powered device through the second transmission line 160;
a first superposition module 122, further configured to block the video signal on the power path;
and a signal processing module 123, configured to perform compensation and amplification processing on the received video signal to enhance the signal amplitude, and transmit 150 the processed video signal to the video parsing device 110 through the first transmission line.
In this embodiment, the POC relay may not only boost the power signal provided by the video resolution device, but also shape the video signal, optimize the video signal, and extend the transmission distance.
In this embodiment, the first overlay module 122 presents a low impedance to the power signal, so that the power signal transmitted from the video parsing device 110 through the first transmission line 150 can be transmitted to the POC powered device 130. Meanwhile, the first overlay module 122 presents a high impedance to the video signal, and blocks the video signal transmitted from the POC powered device 130 on the power path.
In this embodiment, considering that the video signal is attenuated to some extent after being transmitted over a long distance, the high frequency signal is more attenuated due to the characteristics of the transmission line. Therefore, the signal processing module 123 can compensate and amplify the signal, enhance the signal amplitude, and extend the transmission distance from the POC relay 120 to the video resolution device 110.
Referring to fig. 3, in an implementation manner of this embodiment, the signal processing module 123 may include: a first dc blocking capacitor 1231, a level shift circuit 1232, a video operational amplifier 1233, and a second dc blocking capacitor 1234; wherein:
the first blocking capacitor 1231 is used for blocking a direct-current power supply signal;
a level shift circuit 1232, configured to convert the ac-coupled video signal processed by the first dc blocking capacitor 1231 into a dc-coupled signal;
the video operational amplifier 1233 is used for compensating and amplifying the video signal processed by the level shift circuit 1232;
and a second dc blocking capacitor 1234 for blocking the dc power signal.
In this embodiment, in order to avoid the transmission of the power signal on the video path, the signal processing module 123 may be provided with a first dc blocking capacitor 1231 and a second dc blocking capacitor 1234, where the first dc blocking capacitor 1231 and the second dc blocking capacitor 1234 may block the dc power signal so that only the ac video signal can pass through the video path.
In this embodiment, the signal processing module 123 may obtain the ac-coupled video signal after blocking the dc power signal through the first blocking capacitor 1231, and the signal processing module 123 may convert the ac-coupled video signal into the dc-coupled signal through the level shift circuit 1232, and perform compensation and amplification processing on the video signal processed by the level shift circuit 1232 through the video operational amplifier 1233 according to a preset signal amplification factor.
In one example, the schematic diagram of the level shift circuit 1232 can be as shown in fig. 4, wherein the level shift circuit 1232 can employ a two-stage amplifier, the first stage amplification factor is set to-1, the second stage amplification factor is set to-1, the total amplification factor is not changed, and the video signal is changed from an ac signal to a dc signal; wherein the dc bias level can be set by adjusting Rs.
In one example, a schematic diagram of the video op-amp 1233 can be as shown in fig. 5, wherein the video op-amp circuit can include two parts: an amplitude equalizer (in this example a passive equalizer) and a video amplifier. Since the attenuation of high frequency signals is greater than that of low frequency signals when the signals are transmitted over a long distance, and the attenuation of low frequency is greater than that of high frequency signals, the attenuation of low frequency and high frequency can be consistent by adjusting parameters, and then the amplitude of the signals can be further amplified by a Video amplifier (Video Amp).
In this example, for the video signal transmitted through the second transmission line 160, the high frequency signal passes through the capacitor C4, the low frequency signal passes through the resistors R6, R7, and the low frequency attenuation and the high frequency attenuation can be made to be nearly uniform by adjusting the parameters of the passive equalizer circuit.
In the video amplifier circuit, the amplification factor of a low-frequency signal can be determined by the proportion of R4/R5, and the frequency band of high-frequency compensation is adjusted by adjustable resistors Rs and C1.
It should be noted that, in this embodiment, the amplitude equalizer is not limited to a passive equalizer, and an active amplitude equalizer that performs compensation for a high frequency part may also be used, and specific implementation thereof is not described herein again.
In addition, in this embodiment, when the video operational amplifier included in the signal processing module 122 is a rail-to-rail operational amplifier, the signal processing module 122 may not need to include a level shift circuit, and the specific implementation thereof is not described herein again.
Referring to fig. 6, in an embodiment of the present application, the POC powered device 130 may include: a second superposition module 131 and a direct current high-low voltage conversion module 132 which are arranged on the power path, and a third blocking capacitor 133 which is arranged on the video path; wherein:
a second superimposing module 131, configured to block the video signal on the power path;
a dc high-low voltage conversion module 132, configured to convert a voltage of the received dc power signal into a specified voltage;
and a third dc blocking capacitor 133 for blocking the dc power signal.
In this embodiment, the POC powered device 130 mainly functions to power the video source device 140 by dropping the received power signal to a specified voltage (typically 12V, hereinafter 12V for example); in addition, POC powered device 130 may superimpose the video signal of video source device 140 onto the power signal for transmission to POC relay 120 via second transmission line 160.
In this embodiment, second superimposing module 131 presents a low impedance to the power signal, so that the power signal transmitted from POC relay 120 via second transmission line 160 can be transmitted to video source device 140. Meanwhile, the second superimposing module 131 presents a high impedance to the video signal, and blocks the video signal on the power supply path.
In this embodiment, considering that the general operating voltage of the existing video source device is generally 12V, for the power signal transmitted from the POC relay 120 through the second transmission line 160, the POC powered device 130 may drop the voltage to 12V through the dc high-low voltage conversion module (abbreviated as DCDC module) 132 and provide the voltage to the video source device 140.
Optionally, in this embodiment of the present application, the video parsing device 110 may transmit a coaxial signal (may be referred to as a coaxial communication signal) to the video source device 140 according to an actual requirement for communication; similarly, the video source device 140 may also transmit a coaxial communication signal to the video parsing device 110, thereby enabling communication between the video parsing device 110 and the video source device 140.
The coaxial communication signal sent by the video source device 140 to the video analysis device 110 is transmitted to the POC relay device 120 through the second transmission line 160 by the POC powered device, and is transmitted to the video analysis device 110 through the first transmission line 150 by the POC relay device 120, and the specific processing is similar to the processing of sending the video signal to the video analysis device 110 by the video source device 140, which is not described in detail in this embodiment of the present application.
Similarly, the coaxial communication signal sent by the video analysis device 110 to the video source device 140 is transmitted to the POC relay device 120 through the first transmission line 150, and is transmitted to the POC powered device 130 through the second transmission line 160 by the POC relay device 120, and is further transmitted to the video source device by the POC powered device 130, and the specific processing of the coaxial communication signal is similar to the specific processing of the coaxial communication signal sent by the video source device 140 to the video analysis device 110, which is not described herein again in this embodiment of the application.
Referring to fig. 7, a schematic flow chart of a coaxial power supply method according to an embodiment of the present disclosure is shown, where the coaxial power supply method can be applied to the coaxial power supply system, and as shown in fig. 7, the coaxial power supply method may include the following steps:
step S700, the coaxial power supply relay device separates a power signal from the first transmission line.
Step S710, the coaxial power supply relay device performs voltage boosting on the power signal, and transmits the power signal to the coaxial powered device through the second transmission line.
In the embodiment of the present application, in order to solve the above limitation, a POC relay may be disposed between the video analysis device and the front-end terminal, and the POC relay may perform a voltage boosting process on a power signal provided by the video analysis device, so as to reduce loss of the power signal on a transmission path, extend a transmission distance of the power signal, and further expand an application scenario of the POC scheme.
Accordingly, in the embodiment of the present application, a POC relay may be disposed between a Video resolution device (e.g., a DVR (Digital Video Recorder)) and a Video source device (e.g., a high definition analog camera), and the POC relay is configured to boost a power signal provided by the Video resolution device, provide the boosted power signal to the Video source device, and transmit a Video signal sent by the Video source device to the Video resolution device.
Step S720, the coaxial power receiving device separates the power signal from the second transmission line and transmits the power signal to the video source device.
In the embodiment of the application, the second transmission line not only transmits the video signal, but also superposes the power signal.
Accordingly, in the embodiment of the present application, the POC powered device needs to separate the power signal from the second transmission line and transmit it to the video source device.
And step S730, after the video source equipment is electrified and works, transmitting a video signal to the coaxial power supply powered equipment.
In the embodiment of the application, after the video source device is powered on, the video source device can transmit the video signal to the POC powered device.
Step S740, the coaxial power supply powered device receives the video signal transmitted by the video source device, and transmits the video signal to the coaxial power supply relay device through the second transmission line.
In this embodiment, after receiving the video signal transmitted by the video source device, the POC powered device may transmit the video signal to the POC relay through the second transmission line.
And step S750, the coaxial power supply relay device separates the video signal from the second transmission line and sends the video signal to the video analysis device through the first transmission line.
In the embodiment of the application, the second transmission line not only transmits the video signal, but also superposes the power signal.
Accordingly, in the embodiment of the present application, the POC relay needs to separate the video signal from the second transmission line, superimpose the video signal on the first transmission line, and transmit the video signal to the video parsing device.
Step S760, the video analyzing device separates the video signal from the first transmission line, and performs video analyzing processing.
In the embodiment of the application, the first transmission line not only transmits power signals, but also superposes video signals.
The video analysis device can separate the video signal from the first transmission line and carry out video analysis processing.
It should be noted that, in the embodiment of the present application, a specific processing manner after the video parsing device receives the video signal may refer to related implementation in the existing POC scheme, and details of the embodiment of the present application are not described herein.
In the embodiment of the application, the coaxial power supply relay equipment is arranged between the video analysis equipment and the video source equipment, and the power supply signal provided by the coaxial power supply relay equipment and the video analysis equipment is boosted and provided for the video source equipment, so that the distance limit between the video analysis equipment and a front-end terminal in the POC scheme is weakened, the flexibility of construction and wiring of the POC scheme is improved, and the application scene of the POC scheme is expanded.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. The utility model provides a coaxial power supply system which characterized in that, includes video analytic equipment, coaxial power supply relay, coaxial power supply powered device and video source equipment, video analytic equipment with connect through first transmission line between the coaxial power supply relay, coaxial power supply relay with connect through the second transmission line between the coaxial power supply powered device: wherein:
the video analysis equipment is used for transmitting a power supply signal to the coaxial power supply relay equipment through the first transmission line;
the coaxial power supply relay equipment is used for separating a power supply signal from the first transmission line, boosting the power supply signal and transmitting the boosted power supply signal to the coaxial power supply powered equipment through the second transmission line;
the coaxial power supply powered device is used for separating a power supply signal from the second transmission line and transmitting the power supply signal to the video source device;
the video source equipment is used for transmitting a video signal to the coaxial power supply powered equipment after being electrified;
the coaxial power supply powered device is also used for receiving the video signal transmitted by the video source device and transmitting the video signal to the coaxial power supply relay device through the second transmission line;
the coaxial power supply relay equipment is also used for separating a video signal from the second transmission line and sending the video signal to the video analysis equipment through the first transmission line;
the video analysis equipment is also used for separating a video signal from the first transmission line and carrying out video analysis processing; wherein the coaxial power supply relay apparatus includes: the video processing device comprises a boosting processing module, a first superposition module and a signal processing module, wherein the boosting processing module and the first superposition module are arranged on a power path, and the signal processing module is arranged on a video path; wherein:
the boosting processing module is used for boosting the received power supply signal transmitted by the video analysis equipment;
the first superposition module is used for transmitting the power supply signal subjected to the boosting processing by the boosting processing module to the coaxial power supply power receiving equipment through a second transmission line;
the first superposition module is further used for blocking the video signal on a power supply path;
the signal processing module is used for compensating and amplifying the received video signal so as to enhance the signal amplitude, and transmitting the processed video signal to the video analysis equipment through the first transmission line.
2. The coaxial power supply system of claim 1, wherein the signal processing module comprises: the video amplifier comprises a first blocking capacitor, a level shift circuit, a video operational amplifier and a second blocking capacitor; wherein:
the first blocking capacitor is used for blocking a direct-current power supply signal;
the level shift circuit is used for converting the AC coupled video signal processed by the first blocking capacitor into a DC coupled signal;
the video operational amplifier is used for compensating and amplifying the video signal processed by the level shift circuit;
and the second blocking capacitor is used for blocking a direct-current power supply signal.
3. The coaxial power supply system according to claim 1, wherein the coaxial power supply power receiving apparatus comprises: the second superposition module and the direct-current high-low voltage conversion module are arranged on the power path, and the third blocking capacitor is arranged on the video path; wherein:
the second superposition module is used for blocking the video signal on a power supply path;
the direct-current high-low voltage conversion module is used for converting the voltage of the received direct-current power supply signal into a specified voltage;
and the third blocking capacitor is used for blocking a direct-current power supply signal.
4. The system of claim 1, wherein the powered coaxial device and the video source device are deployed in combination; or, the coaxial power supply powered device and the video source device are deployed independently.
5. The coaxial power supply system of claim 1, wherein the video source device is a high definition analog camera.
6. A coaxial power supply relay device, applied to the coaxial power supply system according to any one of claims 1 to 5, the coaxial power supply relay device comprising a boost processing module and a first superimposing module provided on a power supply path, and a signal processing module provided on a video path; wherein:
the boosting processing module is used for boosting the received power supply signal transmitted by the video analysis equipment;
the first superposition module is used for transmitting the power supply signal subjected to the boosting processing by the boosting processing module to the coaxial power supply powered equipment through a second transmission line;
the first superposition module is further used for blocking the video signal on a power supply path;
the signal processing module is used for compensating and amplifying the received video signal so as to enhance the signal amplitude, and transmitting the processed video signal to the video analysis equipment through the first transmission line.
7. The coaxially powered repeater device of claim 6, wherein said signal processing module comprises: the video amplifier comprises a first blocking capacitor, a level shift circuit, a video operational amplifier and a second blocking capacitor; wherein:
the first blocking capacitor is used for blocking a direct-current power supply signal;
the level shift circuit is used for converting the AC coupled video signal into a DC coupled signal;
the video operational amplifier is used for compensating and amplifying the video signal processed by the level shift circuit;
and the second blocking capacitor is used for blocking a direct-current power supply signal.
8. A power receiving apparatus for coaxial power supply, applied to the power receiving system according to any one of claims 1 to 5, the power receiving apparatus for coaxial power supply comprising: the second superposition module and the direct-current high-low voltage conversion module are arranged on the power path, and the third blocking capacitor is arranged on the video path; wherein:
the second superposition module is used for blocking the video signal on a power supply path;
the direct-current high-low voltage conversion module is used for converting the voltage of the received direct-current power supply signal into a specified voltage;
and the third blocking capacitor is used for blocking a direct-current power supply signal.
9. The powered device of claim 8, wherein the powered device and the video source device are deployed in combination; or the coaxial power supply powered device and the video source device are deployed independently.
10. A coaxial power supply method applied to a coaxial power supply system including a video analysis device, a coaxial power supply relay device, a coaxial power supply powered device, and a video source device, wherein the video analysis device is connected to the coaxial power supply relay device via a first transmission line, and the coaxial power supply relay device is connected to the coaxial power supply powered device via a second transmission line, the method comprising:
the coaxial power supply relay device separates a power supply signal from a first transmission line;
the coaxial power supply relay equipment boosts the power supply signal and transmits the boosted power supply signal to the coaxial power supply powered equipment through the second transmission line;
the coaxial power supply powered device separates a power supply signal from the second transmission line and transmits the power supply signal to the video source device;
after the video source equipment is powered on and works, transmitting a video signal to the coaxial power supply powered equipment;
the coaxial power supply powered equipment receives the video signal transmitted by the video source equipment and transmits the video signal to the coaxial power supply relay equipment through the second transmission line;
the coaxial power supply relay equipment separates out a video signal from the second transmission line and sends the video signal to the video analysis equipment through the first transmission line;
the video analysis equipment separates out a video signal from the first transmission line and carries out video analysis processing;
wherein, coaxial power supply relay equipment is right power signal carries out the processing of stepping up, and passes through the second transmission line transmits to coaxial power supply powered device includes:
the coaxial power supply relay equipment performs boosting processing on the received power supply signal transmitted by the video analysis equipment;
transmitting the boosted power supply signal to a coaxial power supply powered device through a second transmission line, and blocking the video signal on a power supply path;
the coaxial power supply relay device separates a video signal from the second transmission line and sends the video signal to the video analysis device through the first transmission line, and the coaxial power supply relay device includes:
and compensating and amplifying the received video signal to enhance the signal amplitude, and transmitting the processed video signal to the video analysis equipment through the first transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175906.5A CN110225284B (en) | 2018-03-02 | 2018-03-02 | Coaxial power supply method, device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175906.5A CN110225284B (en) | 2018-03-02 | 2018-03-02 | Coaxial power supply method, device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110225284A CN110225284A (en) | 2019-09-10 |
| CN110225284B true CN110225284B (en) | 2021-08-24 |
Family
ID=67821975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810175906.5A Active CN110225284B (en) | 2018-03-02 | 2018-03-02 | Coaxial power supply method, device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110225284B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110225283B (en) * | 2018-03-02 | 2021-08-24 | 杭州海康威视数字技术股份有限公司 | Coaxial power supply method, device and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103458214A (en) * | 2013-09-13 | 2013-12-18 | 蔡意兴 | Serial digital interface (SDI) junction line |
| CN104702879A (en) * | 2015-02-09 | 2015-06-10 | 杭州海康威视数字技术股份有限公司 | Rear end and front end processing circuits and coaxial power supply circuit |
| US9252842B2 (en) * | 2012-01-20 | 2016-02-02 | Intersil Americas LLC | Power over coaxial cable |
| CN106303342A (en) * | 2015-05-14 | 2017-01-04 | 杭州海康威视数字技术股份有限公司 | A kind of power supply circuits based on supply power coaxially technology |
| CN107333085A (en) * | 2017-08-16 | 2017-11-07 | 浙江大华技术股份有限公司 | A kind of power supply unit and electric power system |
| KR101798210B1 (en) * | 2016-01-20 | 2017-11-15 | 주식회사 아이디스 | Poc camera auto detection apparatus and method |
| CN110225283A (en) * | 2018-03-02 | 2019-09-10 | 杭州海康威视数字技术股份有限公司 | A kind of supply power coaxially method, apparatus and system |
-
2018
- 2018-03-02 CN CN201810175906.5A patent/CN110225284B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9252842B2 (en) * | 2012-01-20 | 2016-02-02 | Intersil Americas LLC | Power over coaxial cable |
| CN103458214A (en) * | 2013-09-13 | 2013-12-18 | 蔡意兴 | Serial digital interface (SDI) junction line |
| CN104702879A (en) * | 2015-02-09 | 2015-06-10 | 杭州海康威视数字技术股份有限公司 | Rear end and front end processing circuits and coaxial power supply circuit |
| CN106303342A (en) * | 2015-05-14 | 2017-01-04 | 杭州海康威视数字技术股份有限公司 | A kind of power supply circuits based on supply power coaxially technology |
| KR101798210B1 (en) * | 2016-01-20 | 2017-11-15 | 주식회사 아이디스 | Poc camera auto detection apparatus and method |
| CN107333085A (en) * | 2017-08-16 | 2017-11-07 | 浙江大华技术股份有限公司 | A kind of power supply unit and electric power system |
| CN110225283A (en) * | 2018-03-02 | 2019-09-10 | 杭州海康威视数字技术股份有限公司 | A kind of supply power coaxially method, apparatus and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110225284A (en) | 2019-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6392786B2 (en) | Improved resonance suppression for envelope tracking modulators | |
| US20170310380A1 (en) | Full-duplex relay communication method using energy harvesting, full-duplex relay communication system based on energy-harvesting, relay node device, and source node device | |
| JP5535896B2 (en) | 6-port linear network single-wire multi-switch transceiver | |
| JPH05502563A (en) | Method and apparatus for transmitting wideband amplitude modulated radio frequency signals over optical links | |
| JP4889619B2 (en) | Distortion and noise cancellation system for coaxial cascade amplification section in HFC network | |
| CN110225284B (en) | Coaxial power supply method, device and system | |
| CN110225283B (en) | Coaxial power supply method, device and system | |
| KR100806235B1 (en) | Video data transmitting apparatus using for metallic body | |
| US6091441A (en) | Radio frequency detector for cable television distribution systems | |
| KR101681202B1 (en) | Control system for high definition camera based on coaxial cable | |
| US8422543B2 (en) | Apparatus, systems and methods of signal compensation for different signals communicated over a coaxial cable system | |
| JP2008193323A (en) | Distortion compensating device | |
| JP4758111B2 (en) | Television receiving amplifying device and television receiving system | |
| KR101487797B1 (en) | relaying apparatus for broadcasting signal | |
| JP4205788B2 (en) | Apparatus for combining and amplifying two wideband signals | |
| KR101770151B1 (en) | Fm/t-dmb integrated relaying apparatus for mergency alert broadcasting | |
| JP5021265B2 (en) | Remote control device for optical subscriber terminal device, center device and optical subscriber terminal device used therefor | |
| JP5986465B2 (en) | SDI equipment and SDI signal transmission system including the same | |
| JP5261372B2 (en) | Frequency limiting amplifier for frequency conversion module | |
| JP2009537095A (en) | Frequency conversion modulation data clamp | |
| JP4760586B2 (en) | Video transmission system | |
| JP3263249B2 (en) | Head amplifier for the co-listening system | |
| JP2007189571A (en) | Optical receiver | |
| JP2010130499A (en) | Signal transmission method and signal transmission system | |
| JPH06224881A (en) | Optical transmission system and transmitter/receiver for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |