TWM650394U - Power over network detection device - Google Patents

Abstract

The invention disclosed a power over network detection device, which includes a switch, a power over network detection module, a current detection supply circuit and a micro control unit. The switch is electrically connected to a power over network device and is turned on. The power over network detection module, electrically connected to the switch, handshakes with the power over network device to receive direct-current power provided by the power over network device. The current detection supply circuit, electrically connected to the power over network detection module and a powered device, provides direct-current power for the powered device and detects a current consumed by the powered device. The micro control unit receives the current. When the current does not correspond to a normal power consumption current curve, the micro control unit turns off the switch.

Description

Network power supply detection device

The invention relates to a detection device, especially a network power supply detection device.

Figure 1 is a schematic diagram of a Power over Ethernet switch, a Power over Ethernet splitter and a powered device in the prior art. Please refer to Figure 1. At present, Ethernet power supply products with IEEE802.3at/bt communication protocol have become common and can provide non-standard network equipment, such as light-emitting diode (LED) lighting fixtures and appliances. Network equipment such as screens can also freely obtain Ethernet power from 100 meters away. Generally, an Ethernet power splitter (PoE Splitter) 10 is used to provide 15 watts to 90 watts. The power supply energy is passed through the Ethernet power supply switch (Power Source Equipment Ethernet Switch)12. If the Ethernet power supply switch 12 is a network-manageable device, and the powered device 14 is network-manageable, the network administrator can remotely know through the network whether the powered device 14 is using power normally, and monitor the Ethernet power supply. The Ethernet power supply switch 12 switches the equipment on and off. The powered device 14 connected behind the Power over Ethernet splitter 10 is powered off or on as the Power over Ethernet (POE) port of the Power over Ethernet switch 12 is opened and closed; therefore, the powered device The power control of 14 can be freely controlled by the Power over Ethernet switch 12.

In a manageable remote powered device 14, such as a digital network camera (IP Camera) with remote management. Managers in the control room of the computer room can understand whether the equipment is normal based on the image status, such as freeze frames and black shadows, and then judge whether it is normal or abnormal. The central control center can then remotely control the Ethernet power supply switch. 12 Perform the action of powering off and then powering on the port to restart the remote powered device 14 of the port. However, if the powered device 14 does not have remote management or is a device that is not used for network connection, such as a light emitting diode (LED) lamp or a screen, when such device has abnormal power supply, such as a lamp /The screen is damaged, or the lamp load is abnormal. This type of Ethernet power supply splitter 10 is based on the current design. After connecting with the Ethernet power supply switch 12 through the IEEE802.3at/bt standard protocol, and entering the power supply mode (Power Good), the Ethernet power supply The switch 12 will continue to supply power with a DC voltage of 48~56 volts. The Ethernet power supply switch 12 only cares about whether the load is exceeded according to the standard, regardless of whether the remote device is in normal use. If the light-emitting diode lamp serving as the powered device 14 is no longer normal but continues to be powered, the lamp may continue to flash out because the circuit board is burned. In this case, unless the manager goes to the site and discovers or reports the abnormal phenomenon, he or she cannot immediately deal with such abnormal phenomena.

Therefore, this invention aims to solve the above-mentioned problems by proposing a network power supply detection device to solve the problems caused by conventional methods.

The main purpose of this invention is to provide a network power supply detection device that can self-judge whether the current consumed by the powered device is abnormal, and if so, perform power-off and reset operations. Through the process of power outage and reset, the upstream network power supply device is reported to have a record of network connection reset, so that the administrator can take corresponding measures when encountering a network connection reset situation.

In one embodiment of the invention, a network power supply detection device is electrically connected between a powered device and a network power supply device. The network power supply detection device includes a switch and a network power supply detection module. , a current detection supply circuit and a micro control unit. The switch is electrically connected to the network power supply device, and the switch is used to maintain a conductive state. The network power supply detection module is electrically connected to the switch. The network power supply detection module is used to handshake with the network power supply device through the switch to receive the DC power provided by the network power supply device. The current detection supply circuit is electrically connected to the network power supply detection module and the powered device. The current detection supply circuit is used to provide direct current to the powered device and detect the current consumed by the powered device. The micro control unit is electrically connected to the current detection supply circuit and the switching switch. The micro control unit is used to receive current. When the current does not conform to a normal power consumption current curve, the micro control unit turns off the switching switch.

In one embodiment of the present invention, the network power supply detection device further includes a DC voltage reduction module, which is electrically connected between the network power supply detection module and the current detection supply circuit. The DC step-down module is used to reduce the DC power and provide it to the current detection supply circuit.

In one embodiment of the present invention, the network power supply detection device further includes a capacitor, which is electrically connected between the micro control unit and the DC buck module. The DC step-down module is used to store the reduced DC power in a capacitor for use by the micro control unit.

In one embodiment of the present invention, the network power supply detection device further includes a DC connection port, which is electrically connected between the power receiving device and the current detection supply circuit.

In one embodiment of the invention, the network power supply device is a network power supply switch.

In one embodiment of the invention, the power receiving device is a network power receiving device.

In an embodiment of the present invention, the network power supply detection device further includes a first network port and a second network port. The first network connection port is electrically connected to the network power supply device, and the second network connection port is electrically connected between the first network connection port and the power receiving device.

In one embodiment of the invention, the first network port and the second network port are registered jack 45 (RJ45) ports.

In one embodiment of the invention, the switch is a relay.

In one embodiment of the invention, the powered device is a fan, a network camera, a light emitting diode lamp or a display.

Based on the above, the network power supply detection device uses the current detection supply circuit to determine whether the current consumed by the powered device is abnormal. If there is an abnormality, the current detection supply circuit notifies the low-cost micro-control unit to power off and reset. Through the process of power outage and reset, the upstream network power supply device is reported to have a record of network connection reset, so that the administrator can take corresponding measures when encountering a network connection reset situation.

In order to enable your review committee to have a better understanding of the structural features and effects achieved by this creation, we would like to provide you with a diagram of a better embodiment and a detailed description, as follows:

The embodiments of this invention will be further explained below with the help of relevant figures. Wherever possible, the same reference numbers are used in the drawings and description to refer to the same or similar components. In the drawings, shapes and thicknesses may be exaggerated for simplicity and ease of notation. It should be understood that components not specifically shown in the drawings or described in the specification are in forms known to those of ordinary skill in the art. Those of ordinary skill in the art can make various changes and modifications based on the contents of this invention.

When an element is referred to as being "on", it can generally mean that the element is directly on the other element, or that the other element exists between them. Conversely, when an element is said to be "directly on" another element, it cannot have other elements between them. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

References below to "one embodiment" or "an embodiment" refer to a particular element, structure, or feature associated with at least one embodiment. Therefore, “one embodiment” or multiple descriptions of “an embodiment” appearing in multiple places below are not directed to the same embodiment. Furthermore, specific components, structures and features in one or more embodiments may be combined in an appropriate manner.

The disclosure is specifically described with the following examples. These examples are only for illustration, because for those who are familiar with this art, various modifications and modifications can be made without departing from the spirit and scope of the disclosure. Therefore, this disclosure The scope of protection of the disclosed content shall be determined by the scope of the patent application attached. Throughout the specification and claims, unless the content clearly dictates otherwise, the meaning of "a" and "the" includes such statements including "one or at least one" of the element or component. Furthermore, as used in this disclosure, the singular article also includes recitations of plural elements or ingredients unless it is obvious from the particular context that the plural is excluded. Furthermore, as applied to this description and all claims below, "in" may mean "in" and "on" unless the context clearly dictates otherwise. Unless otherwise noted, the terms used throughout the specification and patent claims generally have their ordinary meanings as used in the field, in the disclosure and in the particular context. Certain terms used to describe the disclosure are discussed below or elsewhere in this specification to provide practitioners with additional guidance in describing the disclosure. The use of examples anywhere throughout this specification, including the use of examples of any terminology discussed herein, is for illustrative purposes only and does not, of course, limit the scope and meaning of the disclosure or any exemplified terminology. Likewise, the present disclosure is not limited to the various embodiments set forth in this specification.

It should be understood that the terms "comprising", "including", "having", "containing", "involving", etc., as used herein, are open-ended (open-ended), meaning including but not limited to. In addition, any embodiment or patentable scope of this invention does not need to achieve all the purposes, advantages or features disclosed in this invention. In addition, the abstract part and title are only used to assist in searching for patent documents and are not used to limit the patentable scope of the creative work.

Unless otherwise specified, some conditional sentences or words, such as "can", "could", "might", or "may", usually try to express that the embodiment of this case has, But it can also be interpreted as features, components, or steps that may not be needed. In other embodiments, these features, elements, or steps may not be required.

The following will propose a network power supply detection device of this invention, which uses a current detection supply circuit to determine whether the current consumed by the powered device is abnormal. If there is an abnormality, the current detection supply circuit notifies a low-cost micro control unit to perform Power off and reset. Through the process of power outage and reset, the upstream network power supply device is reported to have a record of network connection reset, so that the administrator can take corresponding measures when encountering a network connection reset situation.

Figure 2 is a schematic diagram of the first embodiment of the network power supply detection device of this invention. Please refer to Figure 2, the following describes the first embodiment of the network power supply detection device 16. The network power supply detection device 16 is electrically connected between a power receiving device 18 and a network power supply device 20 . The power receiving device 18 can be a fan, a network camera, a light emitting diode lamp or a display, but the present invention is not limited thereto. The network power supply detection device 16 includes a switch 160, a network power supply detection module 161, a current detection supply circuit 162 and a micro control unit 163. The switch 160 may be, but is not limited to, a relay. The switch 160 is electrically connected to the network power supply device 20 and the network power supply detection module 161, the current detection supply circuit 162 is electrically connected to the network power supply detection module 161 and the powered device 18, and the micro control unit 163 is electrically connected. Current detection supply circuit 162 and switch 160 .

The network power supply device 20 provides direct current, and the switch 160 maintains a conductive state at ordinary times. The network power supply detection module 161 uses the IEEE802.3at/bt communication protocol to perform handshake with the network power supply device 20 through the switch 160 . After confirming the power receiving capability of the network power supply detection module 161, the network power supply detection module 161 receives the DC power provided by the network power supply device 20 and returns the Maintain Power Signature (MPS) according to the communication protocol. Device for supplying power to the network 20. This direct current can be, but is not limited to, 44 to 56 volts. The current detection supply circuit 162 provides direct current to the power receiving device 18 and detects the current consumed by the power receiving device 18 . The micro control unit 163 receives the current consumed by the power receiving device 18. When the micro control unit 163 determines that the current does not comply with a normal power consumption current curve, the micro control unit 163 turns off the switch 160 for a preset period of time, so that the network The power supply detection module 161 and the current detection supply circuit 162 no longer provide direct current to the powered device 18 . After the preset period ends, the micro control unit 163 will turn on the switch 160 again to complete the reset operation. When the network power supply device 20 is a network power supply switch, because the switch 160 is turned off, the network power supply switch can detect that the network power supply detection module 161 no longer provides DC power to the powered device 18, or even There is a record of the network connection reset, so subsequent processing can be carried out, such as sending a trap packet to remind the network administrator through simple network management protocol (SNMP, simple network management protocol), or using a simple Send an email via Mail Transfer Protocol (SMTP) to notify the administrator and leave a record, or alert the surrounding digital output port.

Figure 3 is a schematic diagram of the second embodiment of the network power supply detection device of the present invention. Please refer to Figure 3. The difference between the second embodiment and the first embodiment is that the network power supply detection device 16 further includes a DC voltage reduction module 164 and a DC power connection port 165. The DC voltage reduction module 164 is electrically connected between the network power supply detection module 161 and the current detection supply circuit 162 . The DC voltage reducing module 164 can reduce the DC power to a voltage required by the powered device 18 , such as 12, 19 or 24 volts, and provide this to the current detection supply circuit 162 . The DC connection port 165 is electrically connected between the power receiving device 18 and the current detection supply circuit 162 , and provides the DC voltage required by the power receiving device 18 to the power receiving device 18 .

When the network power supply device 20 is a network power supply switch, the power receiving device 18 is a network power receiving device, and the network power supply detection device 16 may further include a first network connection port 166 and a second network connection port 167. The first network port 166 and the second network port 167 may be, but are not limited to, registered jack 45 (RJ45) ports. The first network connection port 166 is electrically connected to the network power supply device 20 , and the second network connection port 167 is electrically connected between the first network connection port 166 and the power receiving device 18 . The first network port 166 and the second network port 167 can transmit Ethernet data between the powered device 18 and the network power supply device 20 using the IEEE802.3 Ethernet communication protocol.

Figure 4 is a graph of the power consumption current and power consumption time of the power receiving device of this invention, and Figure 5 is another graph of the power consumption current and power usage time of the power receiving device of this invention. Please refer to Figures 4, 5 and 3. When the micro control unit 163 receives the current consumed by the power receiving device 18, the normal power consumption current curve is regarded as the power consumption current curve between time points T1 to T3. The power consumption current curve between time points T1 and T2 is regarded as the startup load increase area, and the power consumption current curve between time points T2 and T3 is regarded as the operation area. The power consumption current curve in the operation area generally has a fixed operating allowable range. or allowable value. After the time point T3, the fault current of the power receiving device 18 drops to zero or an extremely low value, for example, in an abnormal standby state or a state of constant opening and closing.

Figure 6 is a schematic diagram of the third embodiment of the network power supply detection device of the present invention. Referring to Figure 6, a third embodiment of the network power supply detection device 16 is introduced below. The difference between the third embodiment and the second embodiment is that the network power supply detection device 16 of the third embodiment further includes a capacitor 168 . The capacitor 168 is electrically connected between the micro control unit 163 and the DC buck module 164 . The DC buck module 164 stores the reduced DC power in the capacitor 168 for use by the micro control unit 163 . The capacitor 168 is used with the micro control unit 163 with low power consumption and low cost, so that the survival operation time of the micro control unit 163 can be extended. When the power receiving device 18 needs a longer time to return to the normal power consumption mode, the survival time of the micro control unit 163 is extended, so the switch 160 can be reset multiple times or the off time can be extended.

Figure 7 is the operation flow chart of the network power supply detection device of this invention. Please see Figure 7 and Figure 6. First, as shown in step S10, the micro control unit 163 is powered on. Next, as shown in step S12, the micro control unit 163 reads two flags, namely the first flag and the second flag. The flag represents the current consumed by the power receiving device 18 , and the first flag, the second flag, and the third flag respectively represent the current read sequentially in time. If the micro control unit 163 compares the second flag with the first flag, and the error value of the two flags exceeds the allowable value of the first flag, it indicates that the power was abnormally cut off last time, and the process will take the left path. If the micro control unit 163 determines that the error value of the two flags is less than the allowable value of the first flag, it means that the power was normally cut off last time, and the process will take the right path. If there was an abnormal power outage last time, as shown in step S14, the micro control unit 163 reads the current and writes the second flag. Then, as shown in step S16, after waiting for a preset millisecond, as shown in step S18, the micro control unit 163 reads the current and writes the third flag. As shown in step S20, the micro control unit 163 compares the first flag, the second flag and the third flag. When the error value of the third flag compared with the first flag is greater than the allowable value of the first flag, it indicates that the power is still not used normally. As shown in step S22, the third flag is written into the second flag. As shown in step S24, it is determined whether the micro control unit 163 has a delay design. If there is no delay design, as shown in step S26, the micro control unit 163 turns off the switch 160. Finally, as shown in step S28, the micro control unit 163 switches the switch 160 again to complete the restart. In step S24, if it is determined that the micro control unit 163 has a delay design, as shown in step S30, wait for a delay of milliseconds before proceeding to step S26. In step S20, when the third flag is greater than the second flag, and the error value of the third flag compared with the second flag is within the allowable value of the first flag, it means that the power consumption returns to normal, and step S32 is performed. In step S32, wait for preset milliseconds. Next, as shown in step S34, the micro control unit 163 reads the current and writes the second flag. Then, as shown in step S36, the micro control unit 163 compares the first flag and the second flag. When the error value of the second flag compared with the first flag is greater than the allowable value of the first flag, it indicates abnormal power consumption, and step S24 is performed. When the error value of the second flag compared with the first flag is not greater than the allowable value of the first flag, it indicates normal power usage, and step S38 is performed to write the second flag into the first flag. After step S38, it returns to step S32. In step S12, if it is determined that the error value of the second flag compared with the first flag is less than the allowable value, it means that the last power outage was normal, so step S40 is performed. In step S40, the micro control unit 163 reads the current and writes the first flag and the second flag. After step S40, step S32 is performed.

According to the above embodiments, the network power supply detection device can self-determine whether the current consumed by the powered device is abnormal, and if there is any abnormality, perform power-off and reset operations. Through the process of power outage and reset, the upstream network power supply device is reported to have a record of network connection reset, so that the administrator can take corresponding measures when encountering a network connection reset situation.

The above is only a preferred embodiment of this invention and is not intended to limit the scope of implementation of this invention. Therefore, all equal changes and modifications based on the shape, structure, characteristics and spirit described in the patent application scope of this invention are contemplated. , should be included in the patent application scope of this creation.

10: Ethernet power supply splitter

12:Power over Ethernet switch

14:Powered equipment

16:Network power supply detection device

160:toggle switch

161:Network power supply detection module

162:Current detection supply circuit

163:Micro control unit

164: DC step-down module

165:DC port

166: First network port

167: Second network port

168:Capacitor

18: Power receiving device

20:Network power supply device

T1, T2, T3: time points

S10, S12, S14, S16, S18, S20, S22, S24, S26, S28, S30, S32, S34, S36, S38, S40: Steps

Figure 1 is a schematic diagram of a Power over Ethernet switch, a Power over Ethernet splitter and a powered device in the prior art. Figure 2 is a schematic diagram of the first embodiment of the network power supply detection device of this invention. Figure 3 is a schematic diagram of the second embodiment of the network power supply detection device of the present invention. Figure 4 is a graph of the power consumption current and power consumption time of the power receiving device of this invention. Figure 5 is another graph of the power consumption current and power consumption time of the power receiving device of this invention. Figure 6 is a schematic diagram of the third embodiment of the network power supply detection device of the present invention. Figure 7 is the operation flow chart of the network power supply detection device of this invention.

16:Network power supply detection device

160:toggle switch

161:Network power supply detection module

162:Current detection supply circuit

163:Micro control unit

18: Power receiving device

20:Network power supply device

Claims (10)

A network power supply detection device is electrically connected between a powered device and a network power supply device. The network power supply detection device includes: A switch electrically connected to the network power supply device, wherein the switch is used to maintain a conductive state; A network power supply detection module is electrically connected to the switch, wherein the network power supply detection module is used to handshake with the network power supply device through the switch to receive the network power supply. The direct current provided by the device; A current detection supply circuit electrically connects the network power supply detection module and the powered device, wherein the current detection supply circuit is used to provide the direct current to the powered device and detect the current consumed by the powered device ;as well as A micro control unit is electrically connected to the current detection supply circuit and the switch. The micro control unit is used to receive the current. When the current does not comply with a normal power consumption current curve, the micro control unit turns off the current. Toggle switch. The network power supply detection device described in claim 1 further includes a DC voltage reduction module electrically connected between the network power supply detection module and the current detection supply circuit, wherein the DC voltage reduction module The die set is used to reduce the direct current and provide it to the current detection supply circuit. The network power supply detection device described in claim 2 further includes a capacitor electrically connected between the micro control unit and the DC voltage reduction module, wherein the DC voltage reduction module is used to store the reduced voltage. The direct current is in the capacitor for use by the micro control unit. The network power supply detection device of claim 1 further includes a DC connection port electrically connected between the power receiving device and the current detection supply circuit. The network power supply detection device as described in claim 1, wherein the network power supply device is a network power supply switch. The network power supply detection device according to claim 5, wherein the power receiving device is a network power receiving device. The network power supply detection device as described in request item 6 further includes: a first network connection port electrically connected to the network power supply device; and A second network connection port is electrically connected between the first network connection port and the power receiving device. The network power supply detection device of claim 7, wherein the first network port and the second network port are registered jack 45 (RJ45) ports. The network power supply detection device according to claim 1, wherein the switch is a relay. The network power supply detection device as described in claim 1, wherein the power receiving device is a fan, a network camera, a light emitting diode lamp or a display.