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Power supply equipment and power supply system

A technology of power supply equipment and power receiving equipment, which is applied in the field of coaxial power supply, and can solve problems such as burning out of power receiving equipment and inaccurate determination of the type of power receiving equipment

Active Publication Date: 2017-11-07
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a power supply device and a power supply system to solve the problem in the prior art that the power receiving device is burned due to inaccurate determination of the type of the power receiving device

Method used

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  • Power supply equipment and power supply system
  • Power supply equipment and power supply system
  • Power supply equipment and power supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] figure 1 A schematic structural diagram of a power supply device provided by an embodiment of the present invention, the power supply device includes a power input terminal 11, an identification unit 12, a processing unit 13, a switch unit 14, and an external interface 15; wherein,

[0054] The identification unit 12 is respectively connected to the external interface 15 and the processing unit 13, the external interface 15 is used to connect the power receiving device; the identification unit 12 is used to obtain the power receiving device in real time The divided voltage value of the device, when the divided voltage value is the preset first divided voltage value, it is determined that the powered device is connected to the external interface 15, and the current moment is taken as the first moment; the divided voltage value The second preset moment is determined as the second moment; according to the first moment and the second moment, the rise time of the divided vol...

Embodiment 2

[0066] On the basis of the above embodiments, in the embodiments of the present invention, Figure 4 A schematic structural diagram of a power supply device provided by an embodiment of the present invention, the power supply device further includes: a power processing unit 21, a video processing unit 22, and a video receiving terminal 23;

[0067] The power processing unit 21 is respectively connected to the power input terminal 11 and the switch unit 14, and is used to block the transmission of the video signal sent by the powered device to the power input terminal 11 when the switch unit 14 is closed;

[0068] The video processing unit 22 is respectively connected to the video receiving end 23 and the external interface 15, and is used to receive the video signal sent by the power receiving device, and perform compensation processing on the video signal, and the compensated processed The video signal is sent to the video receiving end 23 .

[0069] The power supply device ca...

Embodiment 3

[0078] When a large power fluctuation occurs in the powered device, such as switching off the infrared light, zooming in and out, etc., the video signal sent by the powered device will have a video signal whose voltage amplitude is much higher than that of the normal video signal , and the video signal with a higher voltage amplitude has a lower frequency, the existence of the video signal with a higher voltage amplitude will cause problems in the recognition of the video signal by the power supply equipment, and eventually lead to the loss of the video signal. In order to ensure that the received video signal can be identified when a large power fluctuation occurs in the powered device, on the basis of the above-mentioned embodiments, in the embodiment of the present invention, Figure 6 It is a schematic structural diagram of a power supply device provided by an embodiment of the present invention, and the power supply device further includes: a fluctuation detection unit 31;...

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PUM

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Abstract

The invention discloses power supply equipment and a power supply system. The power supply equipment comprises a power input end, a recognition unit, a processing unit, a switch unit and an external interface, wherein the recognition unit is used for acquiring a partial pressure value of powered equipment in real time, determining the rising time duration of the partial pressure value of the powered equipment, and sending the rising time duration to the processing unit; the processing unit judges whether the rising time duration is within the preset time duration, if the rising time duration is within the preset time duration, determining the powered equipment as the POC equipment, and supplying power for the powered equipment through the switch unit by the power input end, if the rising time duration is not within the preset time duration, determining that the powered equipment is not the POC equipment, and not supplying power for the powered equipment. Since the difference between the rising time duration of the voltage value of the POC equipment and the rising time duration of the voltage value of the non-POC equipment is large, the power supply equipment acquires the partial voltage value of the powered equipment when in out of power-supply state to determine the rising time duration, thereby determining the type of the powered equipment; and a problem that the powered equipment is burnt due to the error type confirmation of the POC equipment type.

Description

technical field [0001] The invention relates to the technical field of coaxial power supply, in particular to a power supply device and a power supply system. Background technique [0002] Among the currently available analog video transmission systems on the market, there is a Power Over Coaxial (POC) transmission scheme, which includes a power supply end and a power receiving end. The analog video signal is coupled and transmitted in the same coaxial line, the purpose of which is to reduce the construction cost of primary wiring or secondary wiring, and the powered equipment can work normally without external adapters. In the POC transmission solution, there are strict requirements on whether the powered device is a POC device. When the powered device is a POC device, the power supply device can supply power to the powered device normally, but when the powered device is a non-POC device, the power supply device will burn the powered device when it supplies power to the po...

Claims

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Application Information

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IPC IPC(8): H04N7/10H04N5/14
CPCH04N5/14H04N7/10H04N7/102
Inventor 何宇翔朱奇峰许兴玉邓志吉
Owner ZHEJIANG DAHUA TECH CO LTD