CN110970886A - POC-based power supply circuit and method - Google Patents
POC-based power supply circuit and method Download PDFInfo
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- CN110970886A CN110970886A CN201911261486.3A CN201911261486A CN110970886A CN 110970886 A CN110970886 A CN 110970886A CN 201911261486 A CN201911261486 A CN 201911261486A CN 110970886 A CN110970886 A CN 110970886A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The application discloses POC-based power supply circuit and method, and the method comprises the following steps: the detection circuit in the first processing circuit detects whether the image acquisition equipment connected with the first processing circuit supports POC power supply; if yes, the detection circuit determines the POC power supply power supported by the image acquisition equipment and detects whether the POC power supply power is larger than a preset threshold value; if the first processing circuit and the at least one path of second processing circuit are larger than the first processing circuit, the control circuit controls the switch to simultaneously connect the first processing circuit and the at least one path of second processing circuit with the first connector. The technical problem that the power of a single-path POC power supply is limited in the prior art is solved.
Description
Technical Field
The application relates to the technical field of POC power supply, in particular to a POC-based power supply circuit and method.
Background
The Power Over Coax (POC) technology is a technology in which a high-definition video signal, a coaxial signal, and a Power source are combined together and transmitted on a coaxial cable. The POC technology not only greatly simplifies engineering wiring, but also saves cost, so that the POC technology is widely applied to security equipment or home theater equipment and other equipment. For equipment supporting the POC power supply technology, for example, a POC camera, after being connected with a coaxial power supply circuit through a coaxial line, a direct current power supply is superposed on the coaxial line and connected to the POC camera to meet the power supply requirement. At present, a direct current power supply is superposed on a coaxial line by a coaxial power supply circuit, an equivalent circuit is generally built through a triode, the triode of the equivalent circuit works in an amplification area, the voltage drop of the triode working in the amplification area is large, the power consumption of the triode is also large, the power supply of a single-path POC is limited, and when an external device needs high-power POC power supply, the conventional POC power supply circuit cannot provide power meeting requirements.
Disclosure of Invention
The application provides a power supply circuit and a power supply method based on POC (point of sale), which are used for solving the technical problem that the power of a single-path POC (point of sale) power supply is limited in the prior art.
In a first aspect, an embodiment of the present application provides a POC-based power supply circuit, where the circuit includes: the processing circuit of at least one group of video processing ends is used for connecting a plurality of connectors of image acquisition equipment and a switch used for connecting each group of processing circuits and the connectors, each group of processing circuits comprises at least two paths of processing circuits, and each path of processing circuit is connected with one connector; if the POC power supply of the image acquisition device connected to the first processing circuit of the at least two processing circuits is greater than a preset threshold, the switch is configured to connect the first connector to the first processing circuit and the at least one second processing circuit at the same time, where the first processing circuit and the second processing circuit are different circuits of the at least two processing circuits, and the first connector is a connector to which the first processing circuit is connected.
In the solution provided in the embodiment of the present application, each group of processing circuits includes at least two processing circuits, each processing circuit is connected to a connector, each group of processing circuits is connected to the connector through a switch, if the POC power supply of the image capture device connected to a first processing circuit in the at least two processing circuits is greater than a preset threshold, the switch is configured to connect the first connector to the first processing circuit and at least one second processing circuit at the same time, where the first processing circuit and the second processing circuit are different circuits in the at least two processing circuits, and the first connector is the connector connected to the first processing circuit. Therefore, in the solution provided in this embodiment of the application, if the POC power supply power supported by the image capturing device corresponding to any one of the processing circuits in each of the groups of processing circuits is greater than the preset threshold, at least two of the processing circuits in each of the groups of processing circuits are connected to the same connector through the switch, so that the multiple processing circuits simultaneously supply power to an image capturing device, and the problem that the power supply power does not meet the actual requirement due to single POC power supply is avoided.
Optionally, the switch is a switch, the switch is a multi-pole multi-throw switch, and the switch is used for connecting each processing circuit with one connector; or
The switch is at least two switches, each switch is a single-pole double-throw switch, and each switch is used for connecting a path of processing circuit and one connector.
In the solution provided in the embodiment of the present application, each group of processing circuits is connected to a plurality of connectors through one multi-pole multi-throw switch, or each group of processing circuits is connected to a plurality of connectors through at least two switches, and each processing circuit corresponds to one switch. Therefore, in the solution provided by the embodiments of the present application, it is convenient to switch each processing circuit to be connected to a different connector through a multi-pole multi-throw switch or multiple switches.
Optionally, each of the processing circuits includes: the device comprises a power supply circuit, a control circuit, a superposition circuit and a detection circuit;
the power supply circuit is used for supplying power for POC;
the superposition circuit is connected with the power circuit and is used for superposing a power supply on the coaxial cable;
the detection circuit is connected with the control circuit and is used for detecting whether the image acquisition equipment supports POC power supply;
the control circuit is connected with the power circuit and the detection circuit and is used for controlling the POC power supply of the power circuit based on the detection result of the detection circuit.
Optionally, all processing circuits in each set of processing circuits share the same control circuit.
Optionally, each processing circuit provides 6W or 12W of POC power.
In a second aspect, an embodiment of the present application provides a POC-based power supply method, which is applied to the power supply circuit in the first aspect, and the method includes:
the detection circuit in the first processing circuit detects whether the image acquisition equipment connected with the first processing circuit supports POC power supply;
if yes, the detection circuit determines the POC power supply power supported by the image acquisition equipment and detects whether the POC power supply power is larger than a preset threshold value;
if the first processing circuit and the at least one path of second processing circuit are larger than the first processing circuit, the control circuit controls the switch to simultaneously connect the first processing circuit and the at least one path of second processing circuit with the first connector.
Optionally, the detecting circuit in the first processing circuit detects whether the image capturing device connected to the first processing circuit supports POC power supply, including:
the detection circuit detects whether the electric parameter of the access port of the connector connected with the first processing circuit is in a preset value range or not;
if the current value is within the preset value range, the image acquisition equipment supports POC power supply; otherwise, the image acquisition device does not support POC power supply.
Optionally, the determining, by the detection circuit, the POC power supply supported by the image capturing device includes:
if the current value is within a preset first value range, the detection circuit determines that the image acquisition equipment supports 6W of POC power supply;
if the current value is within a preset second value range, the detection circuit determines that the image acquisition equipment supports 12W POC power supply;
if the current value is within a preset third value range, the detection circuit determines that the image acquisition equipment supports POC power supply larger than 12W;
wherein the first value range, the second value range, and the third value range are different.
Optionally, before the controlling circuit controls the switch to connect the first processing circuit and the at least one second processing circuit to the first connector at the same time, the method further includes:
the control circuit controls the circuit detection circuit in the processing circuit except the first processing circuit in each group of processing circuits to be closed.
In a third aspect, an embodiment of the present application provides a POC-based power supply circuit, including:
the detection unit is used for detecting whether the image acquisition equipment connected with the first processing circuit supports POC power supply or not;
the determining unit is used for determining the POC power supply power supported by the image acquisition equipment if the POC power supply is supported, and detecting whether the POC power supply power is larger than a preset threshold value or not;
and the control unit is used for controlling the switch to simultaneously connect the first processing circuit and the at least one path of second processing circuit with the first connector if the threshold value is larger than the preset threshold value.
Optionally, the detection unit has a means for:
the detection circuit detects whether the electric parameter of the access port of the connector connected with the first processing circuit is in a preset value range or not;
if the current value is within the preset value range, the image acquisition equipment supports POC power supply; otherwise, the image acquisition device does not support POC power supply.
Optionally, the determining unit is specifically configured to:
if the current value is within a preset first value range, the detection circuit determines that the image acquisition equipment supports 6W of POC power supply;
if the current value is within a preset second value range, the detection circuit determines that the image acquisition equipment supports 12W POC power supply;
if the current value is within a preset third value range, the detection circuit determines that the image acquisition equipment supports POC power supply larger than 12W;
wherein the first value range, the second value range, and the third value range are different.
Optionally, the control unit is further configured to:
the control circuit controls the circuit detection circuit in the processing circuit except the first processing circuit in each group of processing circuits to be closed.
In a fourth aspect, an embodiment of the present application provides an electronic device, including:
a memory for storing instructions for execution by at least one processor;
a processor for executing instructions stored in the memory to perform the method of the second aspect.
In a fifth aspect, embodiments of the present application provide a computer-readable storage medium storing computer instructions that, when executed on a computer, cause the computer to perform the method of the second aspect.
Drawings
Fig. 1 is a circuit diagram of a POC-based power supply circuit according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of a processing circuit according to an embodiment of the present application;
fig. 3 is a circuit diagram of a superimposing circuit according to an embodiment of the present application;
fig. 4 is a circuit diagram of a detection circuit according to an embodiment of the present application;
fig. 5 is a schematic flowchart of a POC-based power supply method according to an embodiment of the present application;
fig. 6 is a circuit diagram of a POC-based power supply circuit according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a POC-based power supply circuit according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, 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 application.
In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, an embodiment of the present application provides a POC-based power supply circuit, which includes: the video processing system comprises at least one group of processing circuits 11 at a video processing end, a plurality of connectors 12 used for connecting image acquisition equipment, and a switch 13 used for connecting each group of processing circuits 11 with the plurality of connectors 12, wherein each group of processing circuits 11 comprises at least two paths of processing circuits, and each path of processing circuit is connected with one connector 12; if the POC power supply of the image capturing device 14 connected to the first processing circuit 111 in the at least two processing circuits is greater than a preset threshold, the switch 13 is configured to connect the first connector 121 to the first processing circuit 111 and the at least one second processing circuit 112 at the same time, where the first processing circuit 111 and the second processing circuit 112 are different circuits in the at least two processing circuits, and the first connector 121 is a connector to which the first processing circuit 111 is connected.
Specifically, the connector 12 is a coaxial connector, for example, a coaxial connector including: snap fit type connectors (Bayonet Nut Connector, BNC), SMA connectors or threaded connectors (TNC), etc. The plurality of connectors 12 corresponding to each group of processing circuits 11 further includes at least one second connector 122 corresponding to each second processing circuit in the second processing circuit 112 in addition to the first connector 121 corresponding to the first processing circuit 111. The first processing circuit 111 is any one of the processing circuits in each set of processing circuits 11. In the solution provided in the embodiment of the present application, image capture device 14 corresponding to each processing circuit may support POC power supply or non-POC power supply.
If the first processing circuit 111 in each group of processing circuits 11 detects that the POC power supply supported by the corresponding image capturing device 14 is greater than the preset threshold, the number of processing circuits that need to provide POC power for the image capturing device 14 is determined based on the POC power supply supported by the image capturing device 14 corresponding to the first processing circuit 111.
For example, if the POC power supply supported by the image capturing device 14 corresponding to the first processing circuit 111 is 24W, and the POC power supply supported by each processing circuit is 12W, one processing circuit is selected from at least one second processing circuit except the first processing circuit 111 in each group of processing circuits, and the selected one processing circuit is switched to be connected to the first connector 121 corresponding to the first processing circuit 111 through the switch 13 connected to each group of processing circuits.
Referring to fig. 2, in one possible implementation, each processing circuit includes: a power supply circuit 21, a control circuit 22, a superimposing circuit 23, and a detection circuit 24;
the power supply circuit 21 is used for supplying power to the POC;
a superimposing circuit 23 connected to the power supply circuit 21, for superimposing a power supply on the coaxial cable;
the detection circuit 24 is connected with the control circuit 22 and is used for detecting whether the image acquisition equipment supports POC power supply;
and the control circuit 22 is connected with the power circuit 21 and the detection circuit 24, and is used for controlling the power supply of the power circuit POC based on the detection result of the detection circuit 24.
Specifically, referring to fig. 2, the power circuit 21 includes a power supply 211, a switch circuit 212, an over-current detection circuit 213, and a pull-out detection circuit 214, which are connected in sequence, wherein the power supply 211 is a 48V power supply; the switch circuit 212 is connected with the power supply 211, the over-current detection circuit 213 and the control circuit 22, and is used for turning on or off the POC power supply function; an over-current detection circuit 213, connected to the pull-out detection circuit 214 and the control circuit 22, for detecting whether the current in the power circuit 24 exceeds the threshold current, and if so, controlling the switch circuit 212 to turn off the POC power supply function through the control circuit 22; the pull-out detection circuit 214 is connected to the control circuit 22 and configured to detect whether the processing circuit is externally connected to the image capturing device, and if the processing circuit is not externally connected to the image capturing device 14, the control circuit 22 controls the switch circuit 212 to turn off the POC power supply function.
Referring to fig. 3, the superimposing circuit 23 includes a transistor Q1, a capacitor C1, and a resistor R1, wherein one end of the capacitor C1 is connected to the power input terminal and the emitter of the transistor Q1, respectively, the power may be 48V, and the other end is connected to the resistor R1 and the base of the transistor Q1, respectively; the collector of the transistor Q1 is connected to the output terminal and the resistor R1, respectively. When each processing circuit is powered by POC, Q1 in the superimposing circuit 23 operates in the amplification region, and since Q1 operates in the amplification region, the voltage drop across Q1 is large, so that power consumption is large at Q1, and the power of POC supplied by the power source superimposed on the coaxial line is limited.
In the embodiment of the present application, to avoid limitation of POC power supply, a switch 13 is disposed between each group of processing circuits 11 and connector 12. Specifically, both ends of the switch 13 are connected to the connector 12 and the superimposing circuit 23 in the processing circuit, respectively. When each processing circuit performs POC power supply, after the superimposing circuit 23 in each processing circuit superimposes power onto the coaxial line, the superimposed power signal is input to the connector 12 connected to the switch 13 through the switch 13, so that POC power supply is provided to the image capture device 14 connected to the connector 12.
When the switches 13 corresponding to the multiple processing circuits are connected to the same connector 12, each processing circuit inputs the superimposed power signal to the corresponding switch 13, and then the switch 13 simultaneously inputs the superimposed power signal of each processing circuit in the multiple processing circuits to the same connector 12, so that the multiple processing circuits simultaneously supply POC power to the image capturing device 14 connected to the same connector 13, thereby avoiding the problem of POC power limitation.
Referring to fig. 4, the detection circuit 24 includes a transistor Q2, two resistors R2 and R3, and a diode D1, wherein a base of the transistor Q2 is connected to the resistor R3, an emitter of the transistor Q is connected to a dc power supply, a voltage of the dc power supply is 3.3V, a collector of the transistor Q2 is connected to the resistor R2 and the diode D1 in sequence, and the other end of the transistor D1 is connected to the terminal 12; setting a detection point P on a connecting line of R2 and D1; an IO interface in a processor in the electronic device is connected with a base of the triode Q2, and an analog-to-digital conversion interface (ADC) is connected to the detection point P and used for detecting a voltage value of the point P and determining whether the image acquisition device connected with the processing circuit supports POC power supply or not according to the voltage value. It should be understood that the electronic device provided in the embodiment of the present application may be a Digital Video Recorder (DVR), a Network Video Recorder (NVR), or the like, and is not limited herein.
Further, to simplify engineering wiring and save cost, all processing circuits in each set of processing circuits share the same control circuit 22.
Further, in order to enable each processing circuit to switch between different connectors 12, preferably, the switch 13 is a switch, the switch 13 is a multi-pole multi-throw switch, and the switch 13 is used for connecting each processing circuit with one connector 12; or
The switch 13 is at least two switches, each of which is a single-pole double-throw switch, and each of the switches is used for connecting a processing circuit and one of the connectors 12.
Further, each processing circuit provides 6W or 12W of POC power.
Further, referring to fig. 3, each processing circuit further includes: a dc blocking capacitor 25, an analog-to-digital conversion module 26 and a video processing circuit 27; the two ends of the blocking capacitor 25 are respectively connected with the connector 12 and the analog-to-digital conversion module 26, the analog-to-digital conversion module 26 is connected with the video processing circuit 27, and the blocking capacitor 25 is used for isolating a direct-current component input into the analog-to-digital conversion module 26 by the connector 12 and inputting an alternating-current component into the analog-to-digital conversion module 26; the analog-to-digital conversion module 26 is configured to convert the received analog signal into a digital signal; the video processing circuit 27 is used to process the received digital video signal.
In the solution provided in the embodiment of the present application, each group of processing circuits 11 includes at least two processing circuits, each processing circuit is connected to one connector 12, each group of processing circuits 11 is connected to the connector 12 through a switch 13, if the POC power supply of the image capturing device 14 connected to the first processing circuit 111 in the at least two processing circuits is greater than a preset threshold, the switch 13 is configured to connect the first connector 121 to the first processing circuit 111 and the at least one second processing circuit 112 at the same time, where the first processing circuit 111 and the second processing circuit 112 are different circuits in the at least two processing circuits, and the first connector 121 is the connector connected to the first processing circuit 111. Therefore, in the solution provided in this embodiment of the application, if the POC power supply power supported by the image capturing device 14 corresponding to any one of the processing circuits in each group of processing circuits 11 is greater than the preset threshold, at least two of the processing circuits in each group of processing circuits 11 are connected to the same connector 12 through the switch 13, so that the multi-path processing circuits simultaneously supply power to one image capturing device 14, and the problem that the power supply power does not meet the actual requirement due to single POC power supply is avoided.
Referring to fig. 5, an embodiment of the present application provides a POC-based power supply method, which is applied to the power supply circuit shown in fig. 2, and the method includes:
step 501, the detection circuit in the first processing circuit detects whether the image capturing device connected to the first processing circuit supports POC power supply.
In the solution provided in the embodiment of the present application, the first processing circuit is any one of the processing circuits in each group, and the detection circuit in the first processing circuit detects whether the image capturing device corresponding to the first processing circuit supports POC power supply in various ways, which is described below by taking a preferred way as an example.
The detection circuit in the first processing circuit detects whether the image acquisition device connected with the first processing circuit supports POC power supply, and comprises: the detection circuit detects whether the electric parameter of the access port of the connector connected with the first processing circuit is in a preset value range or not; if the current value is within the preset value range, the image acquisition equipment supports POC power supply; otherwise, the image acquisition device does not support POC power supply.
Specifically, the electrical parameter of the inlet of the connector corresponding to the first processing circuit may be a voltage value at the detection point P in the detection circuit of the first processing circuit, or may be a current or another electrical parameter. The method comprises the steps that a value range of an electric parameter is stored in the electronic equipment in advance, wherein the preset value range of the electric parameter can be a multi-section value range or a one-section value range; and if the electric parameter of the access port of the connector corresponding to the first processing circuit is detected to be in a preset value range, the image acquisition equipment corresponding to the first processing circuit supports POC power supply.
For example, the preset value range is (3V, 3.5V), in the first processing circuit of each group of processing circuits, if the detection circuit detects that the voltage value at the detection point P corresponding to the first processing circuit is 3.2V, the electrical parameter of the access port of the connector corresponding to the first processing circuit is within the preset value range, and the image acquisition device corresponding to the first processing circuit supports POC power supply.
Further, after detecting whether the image capturing device corresponding to the first processing circuit in each group of processing circuits supports POC power supply, different steps are performed according to different detection results. Specifically, there are two cases as follows:
in case 1, if the image capture device corresponding to the first processing circuit supports POC power supply, in the scheme provided in the embodiment of the present application, after step 501, step 502 is skipped.
Step 502, the detection circuit determines the POC power supply supported by the image capturing device, and detects whether the POC power supply is greater than a preset threshold.
In the solution provided in the embodiment of the present application, the following relationship exists between the electrical parameter of the access port of the connector corresponding to the first processing circuit and the POC power supply supported by the corresponding image capturing device:
if the magnitude of the electrical parameter is within a preset first value range, the detection circuit determines that the image acquisition equipment supports 6W of POC power supply;
if the magnitude of the electrical parameter is within a preset second value range, the detection circuit determines that the image acquisition equipment supports 12W POC power supply;
if the magnitude of the electrical parameter is within a preset third value range, the detection circuit determines that the image acquisition equipment supports POC power supply of more than 12W;
wherein the first value range, the second value range and the third value range are different.
For example, the preset first value range is V1 ± Δ V, the preset second value range is V2 ± Δ V, and the preset third value range is V3 ± Δ V, where V1, V2, and V3 may be self-defined, or may be determined according to an operating parameter of the actual power supply circuit, for example, self-defined V1 is 1V, V2 is 1.5V, and V3 is 2V; Δ V is a value error, e.g., Δ V ═ 0.1V.
If the custom V1 is 1V, V2 is 1.5V, V3 is 2V, and Δ V is 0.1V, the first value range is (0.9V, 1.1V), the second value range is (1.4V, 1.6V), and the third value range is (1.9V, 2.1V), and when it is detected that the electrical parameter of the access port of the connector corresponding to the first processing circuit is in the range of (0.9V, 1.1V), the image capturing device corresponding to the first processing circuit supports POC power supply of 6W; when the size of the electrical parameter of the access port of the connector corresponding to the first processing circuit is detected to be within the range of (1.4V, 1.6V), the image acquisition device corresponding to the first processing circuit supports 12W of POC power supply; when the size of the electrical parameter of the inlet of the connector corresponding to the first processing circuit is detected to be in the range of (1.9V, 2.1V), the image acquisition device corresponding to the first processing circuit supports the POC power supply of more than 12W.
In case 2, if the image capturing device corresponding to the first processing circuit does not support POC power supply, in the scheme provided in the embodiment of the present application, after step 501, step 504 is skipped.
And step 504, keeping the connection state of the switch and the connector corresponding to each path of processing circuit unchanged.
Further, in the scheme provided in the embodiment of the present application, in case 1, whether the POC power supply is greater than the preset threshold is further detected, and two different schemes exist according to the detection result.
In scheme 1, if the POC power supply supported by the image capturing device corresponding to the first processing circuit is greater than the preset threshold, step 503 is executed after step 502 in the scheme provided in the embodiment of the present application.
Step 503, the control circuit controls the switch to connect the first processing circuit and the at least one second processing circuit with the first connector at the same time.
In order to facilitate understanding of the process of the control circuit controlling the switches and simultaneously connecting the first processing circuit and the at least one second processing circuit with the first connector, a description will be given below by taking an example that each processing circuit corresponds to one switch.
For example, as shown in fig. 6, each group of processing circuits includes two processing circuits, namely a processing circuit 1 and a processing circuit 2, where the processing circuit 1 corresponds to the switch 1, the connector 1 and the image capturing device 1, and the processing circuit 2 corresponds to the switch 2, the connector 2 and the image capturing device 2. The preset threshold is 12W, and when detecting that the POC power supported by the image capturing device 1 corresponding to the processing circuit 1 is 16W, that is, the POC power supply power supported by the image capturing device 1 is greater than the preset threshold, the switch 2 corresponding to the processing circuit 2 is controlled to be connected to the connector 1, so that the processing circuit 1 and the processing circuit 2 simultaneously supply POC to the image capturing device 1.
In scheme 2, if the POC power supply supported by the image capturing device corresponding to the first processing circuit is not greater than the preset threshold, in the scheme provided in the embodiment of the present application, after step 502, step 504 is skipped.
Specifically, the switch corresponding to each processing circuit is connected to the connector corresponding to the switch, so as to supply power to the image capturing device corresponding to each processing circuit.
In the solution provided in the embodiment of the present application, a detection circuit in a first processing circuit of each group of processing circuits detects whether an image capturing device corresponding to the first processing circuit supports POC power supply, and if so, further detects whether POC power supply power supported by the image capturing device corresponding to the first processing circuit is greater than a preset threshold, and if so, switches at least one path of second processing circuit except for the first processing circuit in each group of processing circuits to a first connector corresponding to the first processing circuit through a switch to connect. Therefore, in the solution provided in the embodiment of the present application, when there is an image capturing device corresponding to the first processing circuit in each group of processing circuits that supports high-power supply, at least one second processing circuit and at least one first processing circuit are selected from the other processing circuits except the first processing circuit in the group and are used to simultaneously provide POC power for the image capturing device corresponding to the first processing circuit, that is, multiple processing circuits simultaneously provide POC power for one image capturing device, thereby avoiding a problem that the power supply does not meet the actual requirement due to single POC power supply.
Further, in order to reduce power consumption, before the control circuit controls the switch to simultaneously connect the first processing circuit and the at least one second processing circuit with the first connector, the method further includes:
the control circuit controls the circuit detection circuit in the processing circuit except the first processing circuit in each group of processing circuits to be closed.
Based on the same inventive concept of the above scheme, an embodiment of the present application provides a POC-based power supply circuit, with reference to fig. 7, where the POC-based power supply circuit includes:
a detecting unit 701, configured to detect whether an image capturing device connected to the first processing circuit supports POC power supply;
a determining unit 702, configured to determine, if POC power supply is supported, POC power supply power supported by the image acquisition device, and detect whether the POC power supply power is greater than a preset threshold;
a control unit 703, configured to control the switch to connect the first processing circuit and the at least one second processing circuit to the first connector at the same time if the threshold is greater than the preset threshold.
Optionally, the detecting unit 701 has a module for:
the detection circuit detects whether the electric parameter of the access port of the connector connected with the first processing circuit is in a preset value range or not;
if the current value is within the preset value range, the image acquisition equipment supports POC power supply; otherwise, the image acquisition device does not support POC power supply.
Optionally, the determining unit 702 is specifically configured to:
if the current value is within a preset first value range, the detection circuit determines that the image acquisition equipment supports 6W of POC power supply;
if the current value is within a preset second value range, the detection circuit determines that the image acquisition equipment supports 12W POC power supply;
if the current value is within a preset third value range, the detection circuit determines that the image acquisition equipment supports POC power supply larger than 12W;
wherein the first value range, the second value range, and the third value range are different.
Optionally, the control unit 703 is further configured to:
the control circuit controls the circuit detection circuit in the processing circuit except the first processing circuit in each group of processing circuits to be closed.
Referring to fig. 8, an embodiment of the present application provides an electronic device, including:
a memory 801 for storing instructions for execution by at least one processor;
a processor 802 for executing instructions stored in the memory to perform the POC-based power supply method described above.
An embodiment of the present application provides a computer-readable storage medium, which stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the POC-based power supply method.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A POC-based power supply circuit, comprising: the processing circuit of at least one group of video processing ends is used for connecting a plurality of connectors of image acquisition equipment and a switch used for connecting each group of processing circuits and the connectors, each group of processing circuits comprises at least two paths of processing circuits, and each path of processing circuit is connected with one connector; wherein the content of the first and second substances,
if the POC power supply of the image acquisition device connected to the first processing circuit of the at least two processing circuits is greater than a preset threshold, the switch is configured to connect the first connector to the first processing circuit and the at least one second processing circuit at the same time, where the first processing circuit and the second processing circuit are different circuits of the at least two processing circuits, and the first connector is a connector to which the first processing circuit is connected.
2. The power supply circuit of claim 1 wherein said switch is a switch, said switch being a multiple pole, multiple throw switch, said switch for connecting each processing circuit to one of said connectors; or
The switch is at least two switches, each switch is a single-pole double-throw switch, and each switch is used for connecting a path of processing circuit and one connector.
3. The power supply circuit of claim 1 wherein each processing circuit comprises: the device comprises a power supply circuit, a control circuit, a superposition circuit and a detection circuit; wherein the content of the first and second substances,
the power supply circuit is used for supplying power to the POC;
the superposition circuit is connected with the power circuit and is used for superposing a power supply on the coaxial cable;
the detection circuit is connected with the control circuit and is used for detecting whether the image acquisition equipment supports POC power supply;
the control circuit is connected with the power circuit and the detection circuit and is used for controlling the POC power supply of the power circuit based on the detection result of the detection circuit.
4. The power supply circuit of any one of claims 1-3 wherein all processing circuits in each set of processing circuits share the same control circuit.
5. The power supply circuit of any one of claims 1-3 wherein each processing circuit provides 6W or 12W of POC power.
6. A POC-based power supply method applied to the power supply circuit according to any one of claims 3 to 5, comprising:
the detection circuit in the first processing circuit detects whether the image acquisition equipment connected with the first processing circuit supports POC power supply;
if yes, the detection circuit determines the POC power supply power supported by the image acquisition equipment and detects whether the POC power supply power is larger than a preset threshold value;
if the first processing circuit and the at least one path of second processing circuit are larger than the first processing circuit, the control circuit controls the switch to simultaneously connect the first processing circuit and the at least one path of second processing circuit with the first connector.
7. The method of claim 6, wherein the detection circuit in a first processing circuit detecting whether the image acquisition device connected to the first processing circuit supports POC power, comprises:
the detection circuit detects whether the electric parameter of the access port of the connector connected with the first processing circuit is in a preset value range or not;
if the current value is within the preset value range, the image acquisition equipment supports POC power supply; otherwise, the image acquisition device does not support POC power supply.
8. The method of claim 7, wherein the detection circuit determining the POC supply power supported by the image acquisition device comprises:
if the current value is within a preset first value range, the detection circuit determines that the image acquisition equipment supports 6W of POC power supply;
if the current value is within a preset second value range, the detection circuit determines that the image acquisition equipment supports 12W POC power supply;
if the current value is within a preset third value range, the detection circuit determines that the image acquisition equipment supports POC power supply larger than 12W;
wherein the first value range, the second value range, and the third value range are different.
9. The method of any of claims 6-8, wherein prior to the control circuit controlling the switch to simultaneously connect the first processing circuit and the at least one second processing circuit to the first connector, further comprising:
the control circuit controls the circuit detection circuit in the processing circuit except the first processing circuit in each group of processing circuits to be closed.
10. A POC-based power supply circuit, comprising:
the detection unit is used for detecting whether the image acquisition equipment connected with the first processing circuit supports POC power supply or not;
the determining unit is used for determining the POC power supply power supported by the image acquisition equipment if the POC power supply is supported, and detecting whether the POC power supply power is larger than a preset threshold value or not;
and the control unit is used for controlling the switch to simultaneously connect the first processing circuit and the at least one path of second processing circuit with the first connector if the threshold value is larger than the preset threshold value.
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| CN201911261486.3A CN110970886B (en) | 2019-12-10 | 2019-12-10 | POC-based power supply circuit and method |
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