An ethernet power supply testing device

Abstract

The utility model discloses a power over ethernet testing device, including main control module, time sequence acquisition control isolation module and power receiving simulation module. Power receiving simulation module includes power receiving protocol processing chip and load. Time sequence acquisition control isolation module includes time sequence switch control circuit and current voltage acquisition module. Current voltage acquisition module is connected through switching switch the power supply end of power receiving protocol processing chip respectively. Time sequence switch control circuit connects each switching switch, and through the switching time sequence control of switching switch, realizes the round -robin collection of current voltage acquisition module to each power receiving protocol processing chip power supply end output current voltage. The controller on main control module receives the data that current voltage acquisition module collected through visible light low -speed communication mode. The utility model discloses through visible light low -speed communication and simulates into independent power receiving equipment to the power receiving simulation module, guarantees the objectivity and accuracy required to gather voltage and current data.

Description

Technical Field

[0001] This utility model relates to Ethernet power supply testing. Background Technology

[0002] Power over Ethernet (PoE) is a technology that supplies power to terminal devices connected to an Ethernet cable via PoE devices. PoE devices are typically connected to Ethernet switches, hubs, routers, etc. This eliminates the need for additional power supplies to terminal devices, reducing wiring and power source issues, simplifying cabling, and lowering deployment complexity. This technology is particularly suitable for a large number of outdoor terminal devices, such as surveillance cameras. It has significant application prospects in smart buildings and the Internet of Things (IoT). These terminal devices are typically referred to as powered devices in PoE technology.

[0003] When powering a device via Ethernet, the device searches for a link to supply power to the requested device. Upon detecting a device, it supplies power to the corresponding link and monitors the power supply on the link. Power is then cut off when the request is no longer needed. Therefore, this power supply method is significantly affected by network deployment and data signal strength, requiring testing, especially regarding the stability of long-term power supply.

[0004] In current technology, Power over Ethernet (PoE) testing typically involves directly connecting a load and observing whether the load functions properly to determine if PoE is working correctly. However, it lacks testing for stability aspects such as current, voltage, and power. Furthermore, the power receiving device itself has a significant impact on current and voltage during testing. Summary of the Invention

[0005] The problem this invention aims to solve is to conduct long-term stability tests on Ethernet power supply in terms of current, voltage, and power, while ensuring the objectivity of the test data.

[0006] To solve the above problems, the present invention adopts the following solution: According to this utility model, a Power over Ethernet (PoE) testing device includes a main control module, a timing acquisition and control isolation module, and several power receiving simulation modules. The main control module includes a controller and a first visible light signal receiver. The timing acquisition and control isolation module includes a timing switch control circuit, a current and voltage acquisition module, and a first visible light signal transmitter. The power receiving simulation module includes a network interface, a power receiving protocol processing chip, a first switching switch, and a load. The network interface is connected to the power receiving protocol processing chip. The power supply terminal of the power receiving protocol processing chip is connected to the load through the first switching switch. The current and voltage acquisition module is connected to the first switching switch. The control terminal of the first switching switch of each power receiving simulation module is respectively connected to an output terminal of the timing switch control circuit, so that the first switching switch of each power receiving simulation module is connected to the timing switch control circuit. Under the control of the sequential switch control circuit, the current and voltage acquisition module is switched on and off in turn according to time points, thereby enabling the current and voltage acquisition module to collect the current and voltage output from the power supply terminals of the power receiving protocol processing chips of each power receiving analog module in a time-division manner under the timing control of the sequential switch control circuit; the current and voltage acquisition module is connected to the first visible light signal transmitter, and encodes the acquired current and voltage data into visible light signals through the first visible light signal transmitter in a low-speed communication manner and transmits them; the first visible light signal receiver cooperates with the first visible light signal transmitter; the controller is connected to the first visible light signal receiver, and receives the visible light signals transmitted by the first visible light signal transmitter through the first visible light signal receiver, thereby receiving the current and voltage data collected by the current and voltage acquisition module.

[0007] Furthermore, the power receiving simulation module also includes a second switching switch; there are multiple loads; the first switching switch connects to multiple loads through the second switching switch; the timing acquisition control isolation module includes several second visible light signal receivers corresponding to each of the second switching switches; the control terminal of the second switching switch of each power receiving simulation module is connected to its corresponding second visible light signal receiver; the main control module includes several second visible light signal transmitters corresponding to each of the second visible light signal receivers; the second visible light signal transmitters are connected to the controller; each second visible light signal transmitter cooperates with its corresponding second visible light signal receiver, enabling the controller to send control signals to the second switching switch through low-speed visible light communication between the second visible light signal transmitter and the second visible light signal receiver, thereby controlling the connection switching of the second switching switch and thus realizing load switching.

[0008] Furthermore, the load includes a cement resistor.

[0009] Furthermore, the load includes an external output mechanism consisting of an inverter and a transformer connected together; the inverter converts the DC power output from the power receiving protocol processing chip into AC power, and then outputs it externally through the transformer.

[0010] Furthermore, the main control module also includes a communication module; the communication module is connected to the controller.

[0011] Furthermore, the timing acquisition control isolation module also includes a third visible light transmitter; the main control module also includes a third visible light receiver; the third visible light transmitter is connected to the timing switch control circuit; the third visible light receiver is connected to the controller; the third visible light transmitter and the third visible light receiver cooperate to enable the timing switch control circuit to send the output level information to the controller through the third visible light signal transmitter and the third visible light signal receiver.

[0012] Furthermore, each power-receiving simulation module is mounted on an independent circuit board.

[0013] Furthermore, the main control module and the timing acquisition and control isolation module are located in two phase-insulated different areas on the same circuit board.

[0014] The technical effects of this utility model are as follows: This invention obtains data such as the actual usable voltage and current of the power supply by continuously detecting the current and voltage of the simulated power supply, and thus obtains accurate actual usable power data based on these data.

[0015] This invention uses an optoelectronic data transmission isolation module to completely simulate the power receiving module as an independent power receiving device, reducing external interference and ensuring the objectivity and accuracy required for collecting voltage and current data.

[0016] This invention uses a timing switch control circuit to collect current and voltage data from each powered analog module in turn at specific time points. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0018] In the diagram, 1 is the main control module, 11 is the controller, 12 is the first visible light signal receiver, 13 is the second visible light signal transmitter, 14 is the communication module, and 15 is the third visible light signal receiver. 2 is the timing acquisition and control isolation module, 21 is the current and voltage acquisition module, 22 is the first visible light signal transmitter, 23 is the second visible light signal receiver, 24 is the timing switch control circuit, and 25 is the third visible light signal transmitter. 3 is the power receiving simulation module, 31 is the network interface, 32 is the power receiving protocol processing chip, 33 is the first switching switch, 34 is the load, and 35 is the second switching switch; 4 is the monitor. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] like Figure 1 As shown, an Ethernet power supply test device includes a main control module 1, a timing acquisition and control isolation module 2, and a power receiving simulation module 3. The power receiving simulation module 3 comprises several modules.

[0021] The main control module 1 includes a controller 11 and a first visible light signal receiver 12. The controller 11 is a computing unit and can be implemented using a general-purpose processor combined with memory, or it can be an FPGA chip. The controller 11 is connected to the first visible light signal receiver 12.

[0022] The timing acquisition and control isolation module 2 includes a current and voltage acquisition module 21, a first visible light signal transmitter 22, and a timing switch control circuit 24.

[0023] The power receiving simulation module 3 includes a network interface 31, a power receiving protocol processing chip 32, a first switching switch 33, and a load 34. The network interface 31 is an RJ45 interface. The power receiving protocol processing chip 32 is used to process the power receiving protocol. The power receiving protocol processing chip 32 includes input pins and output pins. The input pins of the power receiving protocol processing chip 32 are connected to the network interface 31. The output pins of the power receiving protocol processing chip 32 include a power supply terminal for outputting power signals and a data terminal for outputting data signals. The power supply terminal of the power receiving protocol processing chip 32 is connected to the load 34. The first switching switch 33 is connected between the power supply terminal of the power receiving protocol processing chip 32 and the load 34; that is, the power supply terminal of the power receiving protocol processing chip 32 is connected to the load 34 through the first switching switch 33.

[0024] In this embodiment, the power receiving simulation module 3 has two network interfaces 31. One network interface 31 is connected to the input pin of the power receiving protocol processing chip 32, and the other network interface 31 is connected to the data terminal of the power receiving protocol processing chip 32. During actual Ethernet power supply testing in this embodiment, the network interface 31 connected to the data terminal of the power receiving protocol processing chip 32 is usually left empty, but can be connected to an actual device when needed.

[0025] The current and voltage acquisition module 21 of the timing acquisition and control isolation module 2 is connected to the first switching switch 33. For the current and voltage acquisition module 21, the connection between the first switching switches 33 of each power receiving simulation module 3 and the current and voltage acquisition module 21 is a parallel connection; that is, all the first switching switches 33 are connected in parallel to the current and voltage acquisition module 21. The first switching switch 33 has two switching states: in the first switching state, the power supply terminal of the power receiving protocol processing chip 32 is directly connected to the load 34 via the first switching switch 33; in the second switching state, the power supply terminal of the power receiving protocol processing chip 32 is connected to the current and voltage acquisition module 21 via the first switching switch 33 before being connected to the load 34. In other words, in the second switching state, the current and voltage acquisition module 21 is connected between the power supply terminal of the power receiving protocol processing chip 32 and the load 34. Each of the first switching switches 33 of each power receiving simulation module 3 is connected to an output terminal of the timing switch control circuit 24, so that the first switching switches 33 of each power receiving simulation module 3 are switched on and off in turn to the current and voltage acquisition module 3 at time points under the control of the timing switch control circuit 24. This allows the current and voltage acquisition module 21 to collect the current and voltage output from the power receiving protocol processing chip 32 of each power receiving simulation module 3 in a time-division manner under the timing control of the timing switch control circuit 24.

[0026] Specifically, the timing switch control circuit 24 includes multiple output terminals, and the output levels of each output terminal are arranged according to a specific timing sequence. The circuit switches between high and low levels. When the output of the sequential switch control circuit 24 is low, the first switch 33 is in the first switching state, and the power supply terminal of the power protocol processing chip 32 is directly connected to the load 34 without going through the current and voltage acquisition module 21. When the output of the sequential switch control circuit 24 is high, the first switch 33 is in the second switching state. At this time, the power supply terminal of the power protocol processing chip 32 is connected to the current and voltage acquisition module 21, and then connected to the load 34 through the current and voltage acquisition module 21.

[0027] In simple terms, the timing switch control circuit 24 is a circuit whose output level changes according to a specific timing sequence, and outputs the level of each port at a certain period. Within one cycle, the output level of each output port includes a period of high level, and the rest of the time is low level, and the ports do not output high level at the same time. That is, at any given moment, the output level of each output port of the timing switch control circuit 24 is either all low level, or one of the ports outputs a high level. In this embodiment, the timing switch control circuit 24 has a cycle of 10 seconds, and within this cycle, the duration of the output port being at a high level is 30~50ms.

[0028] The current and voltage acquisition module 21 is connected to the first visible light signal transmitter 22. The first visible light signal transmitter 22 is paired with and cooperates with the first visible light signal receiver 12 of the main control module 1 to form a data transmission electrical isolation device. The data transmission electrical isolation device realizes data transmission through a low-speed single-wire visible light communication method.

[0029] Specifically, the first visible light signal transmitter 22 is typically an LED light, which encodes the data signal into a flashing signal of the LED light. The first visible light signal receiver 12 is typically implemented by a photodiode or a reverse LED light, which receives the flashing signal of the LED light and decodes it into a data signal.

[0030] Specifically, in this embodiment, the first visible light signal transmitter 22 uses a commercially available TM1814 chip to drive the LED, and the first visible light signal receiver 12 uses a photodiode in conjunction with a decoding circuit. Signal modulation employs PWM modulation. The controller 11 is a von Neumann architecture computing unit composed of a microprocessor and memory. Thus, the current and voltage data acquired by the current and voltage acquisition module 21 are encoded into visible light signals via the first visible light signal transmitter 22 and transmitted using low-speed communication. The controller 11 receives the visible light signals transmitted by the first visible light signal transmitter 22 through the first visible light signal receiver 12, thereby receiving the current and voltage data acquired by the current and voltage acquisition module 21. After receiving the current and voltage data, the controller 11 stores the data and performs statistical analysis to determine whether the Ethernet power supply device connected to the network interface 31 of the power receiving simulation module 3 conforms to the Ethernet power supply standard.

[0031] Furthermore, the specific implementation of the data transmission electrical isolation device composed of the first visible light signal transmitter 22 and the first visible light signal receiver 12 is familiar to those skilled in the art, and will not be described in detail here.

[0032] Furthermore, in this embodiment, the power receiving simulation module 3 has multiple loads 34, and various types of loads. The power receiving simulation module 3 also includes a second switching switch 35. When the power supply terminal of the power receiving protocol processing chip 32 is connected to a load 34, the first switching switch 33 connects multiple loads 34 through the second switching switch 35. That is, the first switching switch 33 is located between the power supply terminal of the power receiving protocol processing chip 32 and the second switching switch 35; the second switching switch 35 is located between the first switching switch 33 and the multiple loads 34. The multiple loads 34 are connected in parallel.

[0033] In this embodiment, the load 34 is divided into the following four types: The first type of load, 34, is a cement resistor; The second type of load 34 is an external output mechanism consisting of a connected inverter and a transformer; The third type of load 34 is a power supply mechanism consisting of a connected inverter, transformer and AC to DC rectifier circuit; The fourth type of load, 34, is a DC output interface.

[0034] Corresponding to the aforementioned multiple loads and second switching switches 35, in this embodiment, the timing acquisition control isolation module 2 includes a second visible light signal receiver 23 paired with and corresponding to each of the second switching switches 35. The control terminal of each power receiving analog module 3's second switching switch 35 is connected to its corresponding second visible light signal receiver 23. Correspondingly, the controller 11 includes several second visible light signal transmitters 13, each corresponding to a second visible light signal receiver 23. The second visible light signal transmitters 13 are connected to the controller 11. Thus, through the cooperation of each second visible light signal transmitter 13 with its corresponding second visible light signal receiver 23, the controller 11 can send control signals to the second switching switches 35 via low-speed visible light communication between the second visible light signal receivers 13 and 23, thereby controlling the connection switching of the second switching switches 35 and achieving load 34 switching. The second visible light signal transmitters 13 and the second visible light signal receivers 23 constitute a data transmission electrical isolation device. The data transmission electrical isolation device composed of the second visible light signal transmitter 13 and the second visible light signal receiver 23 is substantially the same as the data transmission electrical isolation device composed of the first visible light signal transmitter 22 and the first visible light signal receiver 12, and will not be described again in this specification.

[0035] In this embodiment, under normal circumstances, the first type of load 34, the cement resistor, is used as the actual load during testing. If needed, a second, third, or fourth type of load 34 can be used as the actual load during testing. In the second type of load 34, the inverter converts the DC power output from the power protocol processing chip 32 into AC power, which is then output externally through a transformer. In the third type of load 34, the inverter converts the DC power output from the power protocol processing chip 32 into AC power, which is then transformed by a transformer and rectified by an AC-to-DC rectifier circuit to form DC power to power or charge the main control module 1.

[0036] In the second type of load 34 and the third type of load 34, the transformer serves as an isolation element.

[0037] The fourth type of load, 34, is a DC output interface used for connecting external DC loads.

[0038] The first type of load, 34 cement resistors, is provided in four configurations. These four cement resistors correspond to the Power over Ethernet (PoE) standards IEEE 802.3af, IEEE 802.3at, IEEE 802.3bt Type 3, and IEEE 802.3bt Type 4, respectively. The controller 11 selects the corresponding cement resistor based on the standard output by the power supply equipment specifications via switch 21.

[0039] In a preferred embodiment of this example, the four cement resistors are configured as follows: the first cement resistor corresponds to the Power over Ethernet (PoE) standard IEEE 802.3af; the second cement resistor and the first cement resistor in parallel correspond to the PoE standard IEEE 802.3at; the first, second, and third cement resistors in parallel correspond to the PoE standard IEEE 802.3bt Type 3; and the four cement resistors in parallel correspond to the PoE standard IEEE 802.3bt Type 4. Therefore, the resistance value of each cement resistor can be configured to be larger, thereby reducing the heat generated by each cement resistor and improving heat dissipation.

[0040] Considering the heat dissipation problem of cement resistors, this embodiment is also equipped with a fan for cooling the cement resistors.

[0041] In addition, in this embodiment, the main control module 1 also includes a communication module 14; the communication module 14 is connected to the controller 11. Specifically, the communication module 14 includes multiple communication interfaces such as a USB communication module, a UART communication module, and an Ethernet interface. Thus, the controller 11 can connect to the uplink computer through the communication module 14 to receive and process instructions issued by the uplink computer, or send detection data to the uplink computer.

[0042] In this embodiment, the controller 11 preferably uses a general-purpose processor combined with memory; that is, the main control module 1 is a Von Neumann-style computing device familiar to those skilled in the art. In this embodiment, the controller 11 is also connected to a display 4. Thus, the controller 11 can display the current, voltage, and power data of each port and each powered analog module 3 in real time through the display 4. The controller 11 implements the above functions by executing computer program instructions. How the controller 11 implements the above functions by executing computer program instructions is beyond the scope of this specification and will not be elaborated upon here.

[0043] Furthermore, in this embodiment, the main control module 1 and the power receiving simulation module 3 are respectively configured on different PCB circuit boards. Specifically, the main control module 1 and the timing acquisition and control isolation module 2 share a single PCB circuit board, while each power receiving simulation module 3 is mounted on its own independent PCB circuit board. The same PCB circuit board on which the main control module 1 and the timing acquisition and control isolation module 2 are mounted is divided into two insulated regions, and the main control module 1 and the timing acquisition and control isolation module 2 are respectively located within these two different regions. The electrical connection between the components of the timing acquisition and control isolation module 2 and the power receiving simulation module 3 is achieved through the insertion and connection of connectors and sockets. Those skilled in the art will understand that, in another optional embodiment, the main control module 1 and the timing acquisition and control isolation module 2 may also be mounted on different PCB circuit boards.

[0044] Furthermore, considering the potential time synchronization issues between the main control module 1 and the timing acquisition and control isolation module 2, which could lead to confusion regarding which powered analog module 3 the current and voltage data acquired by the current and voltage acquisition module 21 belongs to, in this embodiment, the timing acquisition and control isolation module 2 further includes a third visible light signal transmitter 25 connected to the timing switch control circuit 24, and the main control module 1 further includes a third visible light signal receiver 15 connected to the controller 11. The third visible light signal receiver 15 and the third visible light signal transmitter 25 are paired and cooperate to form a data transmission electrical isolation device. Thus, the timing switch control circuit 24 sends the output level information to the controller 11 through the third visible light signal transmitter 25 and the third visible light signal receiver 15, enabling the controller 11 to determine which powered analog module 3 the currently received current and voltage data acquired by the current and voltage acquisition module 21 belongs to.

[0045] The data transmission electrical isolation device composed of the third visible light signal transmitter 25 and the third visible light signal receiver 15 is substantially the same as the data transmission electrical isolation device composed of the first visible light signal transmitter 22 and the first visible light signal receiver 12, and will not be described again in this specification.

Claims

1. A Power over Ethernet (PoE) testing device, characterized in that, The system includes a main control module, a timing acquisition and control isolation module, and several power receiving simulation modules. The main control module includes a controller and a first visible light signal receiver. The timing acquisition and control isolation module includes a timing switch control circuit, a current and voltage acquisition module, and a first visible light signal transmitter. Each power receiving simulation module includes a network interface, a power receiving protocol processing chip, a first switching switch, and a load. The network interface is connected to the power receiving protocol processing chip. The power supply terminal of the power receiving protocol processing chip is connected to the load via the first switching switch. The current and voltage acquisition module is connected to the first switching switch. The control terminal of the first switching switch of each power receiving simulation module is respectively connected to an output terminal of the timing switch control circuit, such that the first switching switch of each power receiving simulation module is controlled by the timing switch control circuit. The current and voltage acquisition module is connected to the time-sequential switch, thereby enabling the current and voltage acquisition module to collect the current and voltage output from the power supply terminals of the power receiving protocol processing chips of each power receiving analog module in a time-division manner under the timing control of the timing switch control circuit. The current and voltage acquisition module is connected to the first visible light signal transmitter and encodes the acquired current and voltage data into visible light signals through the first visible light signal transmitter in a low-speed communication manner for transmission. The first visible light signal receiver cooperates with the first visible light signal transmitter. The controller is connected to the first visible light signal receiver and receives the visible light signals transmitted by the first visible light signal transmitter through the first visible light signal receiver, thereby receiving the current and voltage data collected by the current and voltage acquisition module.

2. The Ethernet power supply testing device according to claim 1, characterized in that, The power receiving simulation module further includes a second switching switch; there are multiple loads; the first switching switch connects to multiple loads through the second switching switch; the timing acquisition control isolation module includes several second visible light signal receivers corresponding to each of the second switching switches; the control terminal of the second switching switch of each power receiving simulation module is connected to its corresponding second visible light signal receiver; the main control module includes several second visible light signal transmitters corresponding to each of the second visible light signal receivers; the second visible light signal transmitters are connected to the controller; each second visible light signal transmitter cooperates with its corresponding second visible light signal receiver, enabling the controller to send control signals to the second switching switch through low-speed visible light communication between the second visible light signal transmitter and the second visible light signal receiver, thereby controlling the connection switching of the second switching switch and thus realizing load switching.

3. The Ethernet power supply test apparatus according to claim 2, characterized in that, The load includes a cement resistor.

4. The Ethernet power supply testing device according to claim 2, characterized in that, The load includes an external output mechanism consisting of a connected inverter and a transformer; the inverter converts the DC power output from the power receiving protocol processing chip into AC power, which is then output externally through the transformer.

5. The Ethernet power supply test apparatus according to claim 1, characterized in that, The main control module also includes a communication module; the communication module is connected to the controller.

6. The Ethernet Power Supply test apparatus according to any one of claims 1 to 5, characterized in that, The timing acquisition control isolation module further includes a third visible light transmitter; the main control module further includes a third visible light receiver; the third visible light transmitter is connected to the timing switch control circuit; the third visible light receiver is connected to the controller; the third visible light transmitter and the third visible light receiver cooperate to enable the timing switch control circuit to send the output level information to the controller through the third visible light signal transmitter and the third visible light signal receiver.

7. The Ethernet Power Supply test apparatus according to any one of claims 1 to 5, characterized in that, Each power receiving simulation module is mounted on its own independent circuit board.

8. The Ethernet power supply test apparatus according to claim 7, characterized in that, The main control module and the timing acquisition and control isolation module are located in two phase-insulated areas on the same circuit board.

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