CN103606970A - Receiving device, source device and power supply transmission system - Google Patents
Receiving device, source device and power supply transmission system Download PDFInfo
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- CN103606970A CN103606970A CN201310560918.7A CN201310560918A CN103606970A CN 103606970 A CN103606970 A CN 103606970A CN 201310560918 A CN201310560918 A CN 201310560918A CN 103606970 A CN103606970 A CN 103606970A
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Abstract
The invention provides a receiving device, a source device and a power supply transmission system. The receiving device is connected with the source device by a coaxial cable and receives a power supply signal. And the receiving device is used for receiving a first level voltage by the coaxial cable and starting a controller to read whether the receiving device supports power supply signal transmission by a power over coaxial cable (POC); if so, a first feeback signal supporting the power supply signal transmission by the POC is fed back to the source device and the receiving device waits for receiving a target level voltage that is transmitted by the coaxial cable. According to the power supply transmission system provided in the embodiment of the invention, the source device can be prevented from outputting a target level voltage directly to the receiving device; and thus the damage caused by the condition that the receiving device is a non-POC device can be prevented.
Description
Technical field
The present invention relates to transmit power technique fields by coaxial cable power, relate in particular to a kind of receiving system, original device and power delivery system.
Background technology
In prior art, have the technology of not only having transmitted power supply but also signal transmission by same coaxial cable transmission, this technology is referred to as POC(Power over coaxial cable).Utilize POC technology, always source device (Source device) is to receiving equipment (Sink device) transmission power supply and signal, and conventionally to require Sink device be all POC equipment.
In the application scenarios that utilizes coaxial cable transmission power supply, need receiving equipment for POC equipment, because being transmits power supply by coaxial cable, therefore receiving equipment is higher by the received voltage magnitude of coaxial cable, can be for example 24V or 48V, although if receiving equipment be non-POC equipment or be POC equipment but also do not switch to POC state, original device directly will cause receiving equipment to damage to the power supply of receiving system output.
Summary of the invention
The object of the present invention is to provide a kind of receiving system, original device and power delivery system, the supply voltage that can avoid original device directly to export double amplitude causes receiving equipment to damage.
One aspect of the present invention provides a kind of receiving system, described receiving system is connected with original device by coaxial cable and receives power supply signal, this receiving system is for receiving described the first level voltage by described coaxial cable, startup controller is wherein read this receiving system and whether is supported POC transmission power supply signal, if supported, to original device feedback, support the first feedback signal of POC transmission power supply signal, and wait for the target level voltage that reception is transmitted by coaxial cable.
In a preferred embodiment, described receiving system comprises control signal circuit and power output circuit, and the input of described control signal circuit and described power output circuit is coupled on described coaxial cable by the first coupling device and the second coupling device respectively; Described control signal circuit receives by described the first coupling device the isolated control signal of signal from described coaxial cable, and the first feedback signal is written in the signal of described coaxial cable by the first coupling device; Described power output circuit receives by the signal isolated power supply signal of described the second coupling device from described coaxial cable, and described power supply signal is exported to the controller in described control signal circuit when the current potential of described power supply signal is the first level voltage, described power supply signal is exported to the power supply unit for the treatment of being connected with described receiving system when the current potential of described power supply signal is target level voltage.
In a preferred embodiment, the power output circuit in described receiving system comprises the first level Voltage-output branch road and target level Voltage-output branch road;
Described the first level Voltage-output branch road connects power output circuit input and described control signal circuit, described target level Voltage-output branch road connect power output circuit input and described in treat power supply unit;
When the voltage of the input of described power output circuit is the first level voltage, described the first level Voltage-output branch road conducting, described target level voltage follower circuit disconnects; When the voltage of the input of described power output circuit is target level voltage, described the first level Voltage-output branch road disconnects, the conducting of described target level voltage follower circuit.
In a preferred embodiment, described the first level Voltage-output branch road comprises the first derailing switch and the first derailing switch control circuit, described the first derailing switch connects input and the described control signal circuit of described power output circuit, described the first derailing switch control circuit connects the input of described power output circuit and the control end of described the first derailing switch, and described the first derailing switch control circuit is controlled described the first derailing switch conducting during higher than first threshold and lower than Second Threshold at the voltage of the input of power output circuit; Described target level voltage > Second Threshold > the first level voltage > first threshold.
In a preferred embodiment, described target level Voltage-output branch road comprises second switch device and second switch device control circuit, described second switch device connect described power output circuit input and described in treat power supply unit, described second switch device control circuit connects the input of described power output circuit and the control end of described second switch device, and described second switch device control circuit is controlled the conducting of described second switch device during higher than the 3rd threshold value at the voltage of the input of power output circuit; Described target level voltage > the 3rd threshold value > the first level voltage.
In a preferred embodiment, described the first coupler and the second coupler are filter.
The present invention also provides a kind of original device on the other hand, described original device transmits power supply signal by coaxial cable to receiving system, described original device is for exporting the first level voltage by described coaxial cable to receiving system, to start controller in described receiving system, read this receiving system and whether support POC transmission power supply signal, and after the first feedback signal of support POC transmission power supply signal that receives described receiving system feedback, by described coaxial cable to described receiving system export target level voltage, to drive the power supply unit for the treatment of being connected with described receiving system to work.
Further aspect of the present invention also provides a kind of power delivery system, for transmitting power supply signal by coaxial cable, comprises the above-mentioned original device that connects by coaxial cable and above-mentioned receiving system.
In a preferred embodiment, in described receiving system, there is commutation circuit, described original device is after receiving described the first feedback signal, by described coaxial cable, to described receiving system, export the second level voltage, to drive the commutation circuit in described receiving system to be switched to target level voltage accepting state, described receiving system feeds back the second feedback signal to original device and confirms that described receiving system is after target level voltage accepting state, described original device by described coaxial cable export target level voltage to described receiving system; Described target level voltage > second level voltage > the first level voltage.
Compared with prior art, the power delivery system in the embodiment of the present invention can avoid original device directly to receiving system export target level voltage, prevents because receiving system is the damage that non-POC equipment causes.
Accompanying drawing explanation
Fig. 1 is the block diagram of an embodiment of power delivery system provided by the invention;
Fig. 2 is the block diagram of a kind of specific implementation of receiving system in the present invention;
Fig. 3 is a kind of specific implementation block diagram of realizing the receiving system in Fig. 2;
Fig. 4 is a kind of specific implementation block diagram of realizing receiving system in Fig. 3;
Fig. 5 is the another kind of specific implementation block diagram of realizing receiving system in Fig. 2.
Embodiment
For making that object of the present invention, structure, feature and function thereof are had to further understanding, hereby coordinate embodiment to be described in detail as follows.
The embodiment of the present invention provides a kind of power delivery system, and as shown in Figure 1, this power delivery system comprises receiving system 11 and original device 12.Wherein between receiving system 11 and original device 12, by coaxial cable 13, be connected, by this coaxial cable 13, realize the transmission of control signal and the transmission of power supply signal.
Original device 12 is for exporting the first level voltage V1 by this coaxial cable 13 to receiving system 11, with the controller in startup receiving system 11, read this receiving system 11 and whether support POC transmission power supply signal, and after the first feedback signal of support POC transmission power supply signal that receives receiving system 11 feedbacks, by coaxial cable 13, to receiving system 11 export target level voltage Vo, with what drive that receiving system 11 is connected, treat power supply unit 2 normal operations.
Receiving system 11 is for receiving the first level voltage V1 by coaxial cable 13, and start controller wherein and read this receiving system 11 and whether support POC transmission power supply signal, if supported, to original device 12 feedbacks, support the first feedback signal of POC transmission power supply signal, and wait for the target level voltage Vo that reception is transmitted by coaxial cable 13.
Receiving system 11, when receiving target level voltage Vo, treats that to connected power supply unit 2 outputting drive voltages make this treat power supply unit 2 normal operations.
Power delivery system in the embodiment of the present invention can avoid original device directly to receiving system export target level voltage, prevents because receiving system is the damage that non-POC equipment causes.
Fig. 2 shows the block diagram of a kind of specific implementation of receiving system 11, as shown in Figure 2, receiving system 11 in this embodiment comprises control signal circuit 111 and power output circuit 112, and control signal circuit 111 and power output circuit 112 are coupled on coaxial cable 13 by the first coupling device 113 and the second coupling device 114 respectively.
Wherein, control signal circuit 111 receives and passes through the first coupling device 113 from the isolated control signal of coaxial cable 13, and the first feedback signal is written in the signal of coaxial cable 13 by the first coupling device 113.Thus, by the first coupling device 113, can realize from coaxial cable 13 separation control signal and the control signal as feedback signal is written on coaxial cable 13.
Owing to realizing and not only transmitting power supply signal but also transmission of control signals by a coaxial cable 13 between original device in the present invention 12 and receiving system 11, so receiving system 11 need to utilize the first coupling device 113 and the second coupling device 114 separation control signal and power supply signal from the signal of coaxial cable 13.
Fig. 3 shows a kind of specific implementation block diagram of the receiving system 11 of realizing in Fig. 2, and as shown in Figure 3, the receiving system 11 in this embodiment comprises control signal circuit 111 and power output circuit 112.Wherein, power output circuit 112 comprises the first level Voltage-output branch road 1121 and target level Voltage-output branch road 1122.
The first level Voltage-output branch road 1121 connects input A and the control signal circuit 111 of power output circuit 112, and target level Voltage-output branch road 1122 connects the input A of power output circuit 112 and treats power supply unit 2.
When the voltage of the input A of power output circuit 112 is the first level voltage V1, the first level Voltage-output branch road 1121 conductings, and target level voltage follower circuit 1122 disconnects.Thereby realize when original device 12 is exported the first level voltage V1 to receiving system 11, only to 111 power supplies of control signal circuit, with the controller in startup control signal circuit 111, read this receiving system 11 and whether support POC transmission power supply signal, and prevent that the first level voltage V1 is transported to and treat power supply unit 2, avoid treating that the driving voltage of power supply unit 2 is too low.
When the voltage of the input A of power output circuit 112 is target level voltage, the first level Voltage-output branch road 1121 disconnects, 1122 conductings of target level voltage follower circuit, and then make to treat that power supply unit 2 obtains the voltage that can work, avoid higher target level voltage to be transported to control signal circuit 111 from the first level Voltage-output branch road 1121 simultaneously, cause the damage of the equipment such as controller.
Fig. 4 shows the specific implementation block diagram of receiving system structure of block diagram in a kind of Fig. 3 of realization.As shown in Figure 4, the receiving system 11 in this embodiment comprises control signal circuit 111 and power output circuit 112, and power output circuit 112 comprises the first level Voltage-output branch road 1121 and target level Voltage-output branch road 1122.
The first level Voltage-output branch road 1121 comprises the first derailing switch 1121a and the first derailing switch control circuit 1121b.Input A and signal control circuit 111, the first derailing switch control circuit 1121b that the first derailing switch 1121a connects power output circuit 112 connect the input A of power output circuit 112 and the control end of the first derailing switch 1121a.The first derailing switch control circuit 1121b is at the voltage of the input A of power output circuit 112 during higher than first threshold T1 and lower than Second Threshold T2, control the first derailing switch 1121a conducting, wherein, target level voltage Vo> Second Threshold T2> the first level voltage V1> first threshold T1.
Target level voltage follower circuit 1122 comprises second switch device 1122a and second switch device control circuit 1122b.Second switch device 1122a connects the input A of power output circuit 112 and treats power supply unit 2, and second switch device control circuit 1122b connects the input A of power output circuit 112 and the control end of second switch device 1122a.Second switch device control circuit 1122b during higher than the 3rd threshold value T3, controls second switch device 1122a conducting at the voltage of the input A of power output circuit 112.Wherein, target level voltage Vo> the 3rd threshold value T3> Second Threshold T2> the first level voltage V1.
Like this, when the voltage receiving at power output circuit 112 is the first level voltage, because the first level voltage V1 is higher than first threshold T1 and lower than Second Threshold T2, so the first derailing switch control circuit 1121b can control the first derailing switch 1121a conducting, for 111 power supplies of control signal circuit, with the controller starting wherein, carry out work; And due to the first level voltage V1< the 3rd threshold value T3, so second switch device control circuit 1122b can control second switch device 1122a, disconnect, to avoid too low voltage to flow into, treat power supply unit 2.
And the voltage receiving at power output circuit 112 is while being target level voltage Vo, due to target level voltage Vo> Second Threshold T2, so the first derailing switch control circuit 1121b can control the first derailing switch 1121a, disconnect, avoid too high voltage to flow into control signal circuit 111; And due to target level voltage Vo> the 3rd threshold value T3, so second switch device control circuit 1122b controls second switch device 1122a conducting, think and treat that power supply unit 2 powers, guarantee its normal operation.
In above-mentioned each embodiment, the first coupling device 113 and the second coupling device 114 can be filter.
In addition, Fig. 5 shows the another kind of specific implementation block diagram of realizing receiving system in Fig. 2.As shown in Figure 5, in a preferred embodiment, in receiving system 11, also there is commutation circuit 115, the input of commutation circuit 115 is coupled to the second coupling device 114, and the output of commutation circuit 115 is coupled to the first level Voltage-output branch road 1121 and the target level Voltage-output branch road 1122 of power output circuit 112.Original device 12 is after receiving the first feedback signal, by coaxial cable 13, to receiving system 11, export the second level voltage V2, to drive the commutation circuit 115 in described receiving system 11 to be switched to target level voltage accepting state, described receiving system 11 confirms that to original device 12 feedback the second feedback signals receiving system 11 is after target level voltage accepting state, original device 12 passes through coaxial cable 13 export target level voltage Vo to receiving system 11, wherein, target level voltage > second level voltage > the first level voltage.
The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that, the embodiment having disclosed does not limit the scope of the invention.On the contrary, the change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (9)
1. a receiving system, it is characterized in that, described receiving system is connected with original device by coaxial cable and receives power supply signal, this receiving system is for receiving described the first level voltage by described coaxial cable, startup controller is wherein read this receiving system and whether is supported POC transmission power supply signal, if supported, to original device feedback, support the first feedback signal of POC transmission power supply signal, and wait receives the target level voltage transmitting by coaxial cable.
2. receiving system as claimed in claim 1, it is characterized in that, described receiving system comprises control signal circuit and power output circuit, and the input of described control signal circuit and described power output circuit is coupled on described coaxial cable by the first coupling device and the second coupling device respectively; Described control signal circuit receives by described the first coupling device the isolated control signal of signal from described coaxial cable, and the first feedback signal is written in the signal of described coaxial cable by the first coupling device; Described power output circuit receives by the signal isolated power supply signal of described the second coupling device from described coaxial cable, and described power supply signal is exported to the controller in described control signal circuit when the current potential of described power supply signal is the first level voltage, described power supply signal is exported to the power supply unit for the treatment of being connected with described receiving system when the current potential of described power supply signal is target level voltage.
3. receiving system as claimed in claim 2, is characterized in that, the power output circuit in described receiving system comprises the first level Voltage-output branch road and target level Voltage-output branch road;
Described the first level Voltage-output branch road connects power output circuit input and described control signal circuit, described target level Voltage-output branch road connect power output circuit input and described in treat power supply unit;
When the voltage of the input of described power output circuit is the first level voltage, described the first level Voltage-output branch road conducting, described target level voltage follower circuit disconnects; When the voltage of the input of described power output circuit is target level voltage, described the first level Voltage-output branch road disconnects, the conducting of described target level voltage follower circuit.
4. receiving system as claimed in claim 3, it is characterized in that, described the first level Voltage-output branch road comprises the first derailing switch and the first derailing switch control circuit, described the first derailing switch connects input and the described control signal circuit of described power output circuit, described the first derailing switch control circuit connects the input of described power output circuit and the control end of described the first derailing switch, and described the first derailing switch control circuit is controlled described the first derailing switch conducting during higher than first threshold and lower than Second Threshold at the voltage of the input of power output circuit; Described target level voltage > Second Threshold > the first level voltage > first threshold.
5. receiving system as claimed in claim 3, it is characterized in that, described target level Voltage-output branch road comprises second switch device and second switch device control circuit, described second switch device connect described power output circuit input and described in treat power supply unit, described second switch device control circuit connects the input of described power output circuit and the control end of described second switch device, and described second switch device control circuit is controlled the conducting of described second switch device during higher than the 3rd threshold value at the voltage of the input of power output circuit; Described target level voltage > the 3rd threshold value > the first level voltage.
6. receiving system as claimed in claim 2, is characterized in that, described the first coupler and the second coupler are filter.
7. an original device, it is characterized in that, described original device transmits power supply signal by coaxial cable to receiving system, described original device is for exporting the first level voltage by described coaxial cable to receiving system, to start controller in described receiving system, read this receiving system and whether support POC transmission power supply signal, and after the first feedback signal of support POC transmission power supply signal that receives described receiving system feedback, by described coaxial cable to described receiving system export target level voltage, to drive the power supply unit for the treatment of being connected with described receiving system to work.
8. a power delivery system, for transmitting power supply signal by coaxial cable, is characterized in that, comprises the original device as claimed in claim 7 and the receiving system as described in any one in claim 1 to 6 that by coaxial cable, connect.
9. system as claimed in claim 8, it is characterized in that, in described receiving system, there is commutation circuit, described original device is after receiving described the first feedback signal, by described coaxial cable, to described receiving system, export the second level voltage, to drive the commutation circuit in described receiving system to be switched to target level voltage accepting state, described receiving system feeds back the second feedback signal to original device, to confirm that described receiving system is after target level voltage accepting state, described original device arrives described receiving system by described coaxial cable export target level voltage, described target level voltage > second level voltage > the first level voltage.
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| CN201310560918.7A CN103606970B (en) | 2013-11-12 | 2013-11-12 | A kind of reception device, original device and power delivery system |
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| CN201310560918.7A CN103606970B (en) | 2013-11-12 | 2013-11-12 | A kind of reception device, original device and power delivery system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994269A (en) * | 2015-07-22 | 2015-10-21 | 杭州海康威视数字技术股份有限公司 | Power supply equipment and power supply control method and device for image acquisition equipment |
| 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 |
| CN110323739A (en) * | 2019-06-20 | 2019-10-11 | 浙江大华技术股份有限公司 | A kind of power supply unit and power supply system |
| CN110568282A (en) * | 2019-07-29 | 2019-12-13 | 浙江大华技术股份有限公司 | Power supply detection circuit and power receiving end detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2922340Y (en) * | 2006-06-10 | 2007-07-11 | 上海未来宽带技术及应用工程研究中心有限公司 | New cable bridge device power supplied by coaxial cable |
| CN102255520A (en) * | 2010-05-21 | 2011-11-23 | 长盛科技股份有限公司 | Power supply adapter and power supply management method |
| CN202150863U (en) * | 2011-07-15 | 2012-02-22 | 上海理工大学 | POE power supply apparatus having automatic voltage detection function |
| CN202888712U (en) * | 2012-09-21 | 2013-04-17 | 敖锋 | Intelligent load switch cabinet |
| US20130187445A1 (en) * | 2012-01-20 | 2013-07-25 | Intersil Americas LLC | Power over coaxial cable |
-
2013
- 2013-11-12 CN CN201310560918.7A patent/CN103606970B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2922340Y (en) * | 2006-06-10 | 2007-07-11 | 上海未来宽带技术及应用工程研究中心有限公司 | New cable bridge device power supplied by coaxial cable |
| CN102255520A (en) * | 2010-05-21 | 2011-11-23 | 长盛科技股份有限公司 | Power supply adapter and power supply management method |
| CN202150863U (en) * | 2011-07-15 | 2012-02-22 | 上海理工大学 | POE power supply apparatus having automatic voltage detection function |
| US20130187445A1 (en) * | 2012-01-20 | 2013-07-25 | Intersil Americas LLC | Power over coaxial cable |
| CN202888712U (en) * | 2012-09-21 | 2013-04-17 | 敖锋 | Intelligent load switch cabinet |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106303342B (en) * | 2015-05-14 | 2022-11-22 | 杭州海康威视数字技术股份有限公司 | Power supply circuit based on coaxial power supply technology |
| CN104994269A (en) * | 2015-07-22 | 2015-10-21 | 杭州海康威视数字技术股份有限公司 | Power supply equipment and power supply control method and device for image acquisition equipment |
| CN104994269B (en) * | 2015-07-22 | 2018-10-19 | 杭州海康威视数字技术股份有限公司 | Power supply unit, method for controlling power supply and device for image capture device |
| CN110323739A (en) * | 2019-06-20 | 2019-10-11 | 浙江大华技术股份有限公司 | A kind of power supply unit and power supply system |
| US11870596B2 (en) | 2019-06-20 | 2024-01-09 | Zhejiang Dahua Technology Co., Ltd. | Systems and devices for power supply |
| CN110568282A (en) * | 2019-07-29 | 2019-12-13 | 浙江大华技术股份有限公司 | Power supply detection circuit and power receiving end detection method |
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| CN103606970B (en) | 2016-08-17 |
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