CN218003546U - Testing device of PSE equipment - Google Patents

Abstract

The utility model discloses a testing arrangement of PSE equipment. The device comprises a network port, a network transformer, a rectifying unit, a PD protocol unit, a current measuring unit, an adjustable unit, a DC-DC unit, a voltage dividing unit, a processing unit and a display unit; the network port is connected with a network transformer, the network transformer is connected with a rectifying unit, and the rectifying unit is connected with a PD protocol unit; the PD protocol unit is connected with the current measuring unit, the PD protocol unit is connected with the first end of the voltage dividing unit, the current measuring unit is connected with the processing unit, and the second end of the voltage dividing unit is connected with the processing unit; the current measuring unit is connected with the adjustable unit, the current measuring unit is connected with the DC-DC unit, and the DC-DC unit is connected with the processing unit; the output end of the processing unit is connected with the display unit. The technical scheme of the utility model power that can dynamic adjustment PSE equipment load realizes the functional test of PSE equipment.

Description

Testing device of PSE equipment

Technical Field

The embodiment of the utility model provides a relate to equipment power supply test technical field, especially relate to a testing arrangement of PSE equipment.

Background

POE refers to a technology that can provide direct current power supply for some IP-based terminals (such as IP phones, wireless local area network access points AP, network cameras, etc.) while transmitting data to such devices without changing the existing ethernet wiring infrastructure. PSE is a device that uses POE technology to power such terminals. A complete POE system comprises two parts, namely a Power Sourcing Equipment (PSE) and a Power receiving Device (PD). The PSE is the power sourcing terminal, e.g., PSE switch, and the PD is the power receiving terminal. The PD power receiving end equipment is connected with the PSE switch through a network cable, and the PSE of the switch supplies power to the equipment. The POE power supply technology is characterized in that power is supplied while network signals are transmitted through a network transmission cable, a special power supply line is omitted through POE power supply, and the POE power supply technology is more convenient to use. And meanwhile, the voltage of the POE power supply circuit is lower, and compared with the traditional AC and DC power supply modes, the low-voltage power supply mode is safer.

In the application of network products such as 4G, 5G small base stations and wifi6, the power consumption of the equipment is gradually increased, and especially, the power consumption of the 4G +5g small base station product reaches more than 50 w. The newly introduced POE standard (802.3 bt) protocol already supports 25W boost from 802.3at to 72W. The PSE-supporting switch equipment needs to test functions of the PSE in design and production, and the functions and the performance of the PSE-supporting switch equipment are tested, for example, whether a port can supply power or not, what power can be achieved by maximum power supply, whether each port can be accessed into PD equipment at the same time or not, and the like. Therefore, a testing apparatus is needed to implement a network port power supply performance test for the PSE device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a testing arrangement of PSE equipment, the power of dynamic adjustment PSE equipment load can show real-time voltage, electric current and power, realizes the functional test to PSE equipment.

According to an aspect of the utility model provides a testing arrangement of PSE equipment, this testing arrangement includes: the system comprises a network port, a network transformer, a rectifying unit, a PD protocol unit, a current measuring unit, an adjustable unit, a DC-DC unit, a voltage dividing unit, a processing unit and a display unit;

the network port is connected with the network transformer, the network transformer is connected with the rectifying unit, and the rectifying unit is connected with the PD protocol unit;

a first output end of the PD protocol unit is connected to the current measuring unit, a second output end of the PD protocol unit is connected to a first end of the voltage dividing unit, a first output end of the current measuring unit is connected to a first input end of the processing unit, and a second end of the voltage dividing unit is connected to a second input end of the processing unit; a second output end of the current measuring unit is connected with the adjustable unit, a third output end of the current measuring unit is connected with the DC-DC unit, and the DC-DC unit is connected with a third input end of the processing unit;

the output end of the processing unit is connected with the display unit.

Optionally, the testing apparatus of the PSE device further includes a communication unit, a first end of the communication unit is connected to the processing unit, and a second end of the communication unit is connected to the network transformer.

Optionally, the communication unit includes a PHY chip.

Optionally, the PD protocol unit includes an MP8020 chip.

Optionally, the adjustable unit includes a high-power adjustable resistor, and a resistance value of the high-power adjustable resistor is adjustable.

Optionally, the display unit comprises an LCD liquid crystal display.

Optionally, the DC-DC unit comprises an MP9928 chip.

Optionally, the processing unit includes a single chip microcomputer, an MCU or an FPGA.

Optionally, the current measuring unit comprises a current measuring resistor.

Optionally, the voltage dividing unit includes a voltage dividing resistor.

According to the technical scheme of the embodiment, the load is simulated through the adjustable unit, the power of the load of the PSE equipment is dynamically adjusted, and the function measurement of the PSE equipment is realized; the processing unit measures voltage and current in real time and calculates power; the display unit displays the voltage and the current measured by the processing unit and the calculated power in real time; the detection of a plurality of ports of the PSE equipment can be realized, a large amount of time is saved, the whole testing process is more efficient, and the use of a large amount of equipment with different powers is avoided; the problems that in the prior art, multi-port testing needs to continuously replace equipment with different powers, the testing process is complex and low in efficiency, testing parameters cannot be displayed in real time and the like are solved; the technical scheme of this embodiment test process is simple consuming time weak point, and the visual display in real time of test parameter realizes the functional test to PSE equipment.

It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.

Fig. 1 is a schematic structural diagram of a testing apparatus of a PSE device according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a network port, a network transformer and a rectifying unit provided according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a testing apparatus of a PSE device according to an embodiment of the present invention;

fig. 4 is a circuit diagram of a PD protocol unit provided according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a DC-DC unit provided according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The existing POE protocol test equipment is an instrument equipment, is usually used for research and development of functions such as test, test protocol, load and the like, has only one port, and is not suitable for detection application of a production line. When the production line is in production, a plurality of loads need to be accessed simultaneously to test all ports of the PSE switch simultaneously, so that the production efficiency is improved. Therefore, a new testing device for PSE equipment is urgently needed.

In order to solve the defect of the above-mentioned test, the embodiment of the utility model provides a testing arrangement of PSE equipment is provided, figure 1 is according to the utility model provides a testing arrangement's of PSE equipment structure schematic diagram, figure 2 is according to the utility model provides a net gape, network transformer, the circuit diagram of rectification unit, refer to figure 1 and figure 2, this testing arrangement includes: the network interface 10, the network transformer 20, the rectifying unit 30, the PD protocol unit 40, the current measuring unit 50, the adjustable unit 60, the DC-DC unit 70, the voltage dividing unit 80, the processing unit 90, and the display unit 100; the network port 10 is connected with a network transformer 20, the network transformer 20 is connected with a rectifying unit 30, and the rectifying unit 30 is connected with a PD protocol unit 40; a first output end of the PD protocol unit 40 is connected to the current measuring unit 50, a second output end of the PD protocol unit 40 is connected to a first end of the voltage dividing unit 80, a first output end of the current measuring unit 50 is connected to a first input end ADC1 of the processing unit 90, and a second end of the voltage dividing unit 80 is connected to a second input end ADC2 of the processing unit 90; a second output end of the current measuring unit 50 is connected with the adjustable unit 60, a third output end of the current measuring unit 50 is connected with the DC-DC unit 70, and the DC-DC unit 70 is connected with a third input end of the processing unit 90; an output of the processing unit 90 is connected to a display unit 100.

Specifically, PSE equipment has a plurality of interfaces, when every interface tests, can utilize the net twine to be connected interface and net gape 10, both can carry out data transmission and can supply power, and net gape 10 is connected with network transformer 20, and network transformer 20 mainly is used for signal transmission, impedance matching, waveform restoration, signal clutter suppression and high voltage isolation. The network transformer 20 may isolate different levels between different network devices connected by the network line to prevent different voltages from being transmitted through the network line to damage the devices. The network interface 10 comprises a first sub network interface J1 and a second sub network interface J2, the first sub network interface J1 and the second sub network interface J2 both comprise TX +, TX-, RX +, RX-, the first sub network interface is POE PD RJ45 network interface, and the second sub network interface is pure data RJ45 network interface. The first end of the network transformer 20 is connected with the first sub-network port J1, the second end of the transformer is connected with the second sub-network port J2, the network transformer 20 is further electrically connected with the rectifying unit 30, the rectifying unit 30 comprises rectifying diodes D2, D3, D4 and D5, and switching tubes Q4, Q5, Q6 and Q7, and outputs a direct current voltage of about 48-54V through rectification.

The rectifying unit 30 is connected to the PD protocol unit 40, and the PD protocol unit 40 implements POE protocol negotiation to determine a class level. The PD protocol unit 40 outputs a dc voltage of about 48-54V dc. The output voltage varies from one PSE device to another, such as from one switch to another. Illustratively, the DC voltage is between 44 and 54V, with a typical value of 48V. Typical operating current is 10-350 mA, typical output power: 15.4W. The overload detection current is 350-500 mA. Under no-load conditions, the maximum required current is 5mA. The PD device is provided with four Class electric power requests of 3.84-12.95W. The highest working power required by the Class0 equipment is 0-12.95W; the highest working power required by Class1 equipment is 0-3.84W; the working power required by Class2 equipment is between 3.85W and 6.49W; the power range of a Class3 plant is 6.5-12.95W.

A first output terminal of the PD protocol unit 40 is connected to the current measuring unit 50, and the current measuring unit 50 may be a current measuring resistor, which selects a small-resistance high-power resistor, for example, a 1 ohm 10W resistor. The second output end of the current measuring unit 50 is connected to the adjustable unit 60, and the adjustable unit 60 can be flexibly adjusted to various powers by adopting an adjustable resistance manner. The adjustable element 60 may be a high power adjustable resistor, for example, a 600 ohm, 200w adjustable resistor. Then when the resistance is 600 ohms at maximum, P = U according to the formula ² (54 × 54)/600 =4.86w can be measured; when the resistance is adjusted to 40 ohms, P = U according to the formula ² (54 × 54)/40 =72.9w power can be measured. And simulating a load through an adjustable resistor to realize power calculation measurement of the PSE equipment.

The voltage dividing unit 80 includes an ADC analog-to-digital converting unit, a first input terminal ADC1 of the ADC analog-to-digital converting unit is used for measuring the real-time output voltage, and a second input terminal ADC2 of the ADC analog-to-digital converting unit is used for measuring the real-time output current. A second output end of the PD protocol unit 40 is connected to a first end of the voltage dividing unit 80, and a second end of the voltage dividing unit 80 is connected to a second input end ADC2 of the processing unit 90; the voltage divider 80 divides the voltage of about 54V, which is the direct current output by the PD protocol unit 40, into a direct current voltage of 5V or less, and the second input terminal ADC2 of the processing unit 90 can measure the partial voltage. If the adjustable unit 60 is configured with a high-power adjustable resistor, so that the output current is 1A, and the resistor of the current measuring unit 50 is 1 ohm, the voltage difference between the two ends of the current measuring unit 50 is 1V, and the difference between the voltages is measured through the first input terminal ADC1 of the processing unit 90 and is divided by the resistance of the current measuring unit 50, then the real-time current can be obtained.

The third output terminal of the current measuring unit 50 is connected to the DC-DC unit 70, the DC-DC unit 70 is connected to the third input terminal of the processing unit 90, and the DC-DC unit 70 is configured to convert the direct voltage of 54V into a direct voltage of 5V, so as to supply power to the processing unit 90 and the display unit 100. The output end of the processing unit 90 is connected to the display unit 100, the processing unit 90 is mainly used for measuring voltage and current and calculating power, the processing unit 90 sends a real-time measurement result to the display unit 100, and the display unit 100 is used for displaying the voltage and the current measured by the processing unit 90 and the calculated power in real time.

According to the technical scheme of the embodiment, the load is simulated through the adjustable unit, the power of the load of the PSE equipment is dynamically adjusted, and the function measurement of the PSE equipment is realized; the processing unit measures voltage and current in real time and calculates power; the display unit displays the voltage and the current measured by the processing unit and the calculated power in real time; the detection of a plurality of ports of the PSE equipment can be realized, a large amount of time is saved, the whole testing process is more efficient, and the use of a large amount of equipment with different powers is avoided; the problems that in the prior art, multi-port testing needs to continuously replace equipment with different powers, the testing process is complex and low in efficiency, testing parameters cannot be displayed in real time and the like are solved; according to the technical scheme, the testing process is simple and short in time consumption, the testing parameters can be visually displayed in real time, and the function test of the PSE equipment is realized.

Fig. 3 is a schematic structural diagram of a testing apparatus of a PSE device according to an embodiment of the present invention, referring to fig. 2 and fig. 3, optionally, the testing apparatus of the PSE device further includes a communication unit 110, a first end of the communication unit 110 is connected to the processing unit 90, and a second end of the communication unit 110 is connected to the network transformer 20.

Specifically, the processing unit 90 is connected to the network transformer 20 through the communication unit 110, and further implements network communication through a second sub-network port J2 in the network port 10. In the automatic testing process, the processing unit 90 may send the real-time measurement result to the network through the network port 10, and then the automatic testing system may read the result in real time, and determine whether the test meets the requirement, whether the tested interface passes, whether the test is completed, and the like.

With continued reference to fig. 3, optionally, the communication unit 110 includes a PHY chip.

Specifically, when the network transformer 20 is connected to the network port 10 through a PHY chip in an ethernet device, one network transformer 20 is added in the middle. The network transformer 20, which is mainly used for data transmission, filters the differential signal from the PHY chip by differential mode coupling to enhance the signal, and couples the differential signal to the other end of the network cable with different levels by electromagnetic field conversion. By utilizing the PHY chip to carry out network communication, the detection result can be output in real time, and whether the interface of the PSE equipment works normally or not is further judged.

Fig. 4 is a circuit diagram of a PD protocol unit provided according to an embodiment of the present invention, with reference to fig. 2, fig. 3 and fig. 4, optionally, the PD protocol unit 40 includes an MP8020 chip.

Specifically, the PD protocol unit 40 implements POE protocol negotiation to determine the class level. And the protocol intercommunication with the PSE is realized through a POE protocol chip MP 8020. The 802.3bt protocol may be supported, satisfying all configurations of class0-class 8. The 802.3bt specification introduces four new high power PD classifications (classes) to bring the total number of single feature classes to 9. Classes 5-8 are new to the PoE standard and translate to PD power levels of 40.0W to 71W.

The output VDD, VSS of the rectifying unit 30 is used as the power input VDD, GND of the MP8020 chip. The MP8020 chip realizes protocol negotiation with a power receiving end of the PSE, and outputs a direct current voltage of 54V through an output end VOUT and GND. The MP8020 controls the on-off of the MOS tube Q1 to realize the switching value control of the output voltage.

With continued reference to fig. 3, the tunable element 60 may optionally include a high power tunable resistor having a tunable resistance.

Specifically, the function measurement of the PSE equipment is realized by simulating a load through an adjustable resistor. The adjustable resistor is used for realizing adjustable load power, so that the flexibility and the applicability of the testing device are ensured, a large amount of time is saved, and the whole testing process is more efficient.

With continued reference to fig. 3, the display unit 100 optionally includes an LCD-liquid crystal display.

Specifically, the display unit 100 may be an LCD liquid crystal display, an LCD liquid crystal display and the processing unit 90, and is configured to display the voltage, the current, and the calculated power measured by the processing unit 90 in real time, so that the visibility of the testing apparatus of the PSE device is better.

Fig. 5 is a circuit diagram of a DC-DC unit according to an embodiment of the present invention, and referring to fig. 3 and 5, optionally, the DC-DC unit 70 includes an MP9928 chip.

Specifically, the DC-DC unit 70 is used for converting a direct current 54V voltage into a direct current 5V voltage for supplying power to the processing unit 90 and the display unit 100. The DC-DC unit 70 may be an MP9928 chip, and the output VOUT and GND of the MP8020 chip output DC voltage 54V as the input VIN and GND of the MP9928 chip. The resistor R111 enables setting of the DC-DC switching frequency, and the resistance value is typically set to 37.4K Ω. The two outputs of TG and BG of the MP9928 chip respectively control the MOS transistors Q9 and Q8, and the control of direct-current switching value is realized. The inductor L1 realizes freewheeling and energy storage and is typically set to 4.7uh. Resistor R112 enables sensing of the output current and is typically set to 0.007 ohms. The resistor R113 and the resistor R114 implement configuration of the output voltage value.

With continued reference to fig. 3, optionally, the processing unit 90 includes a single chip microcomputer, MCU or FPGA.

In particular, the measurement of the voltage and current is carried out using the processing unit 90. The processing Unit 90 may be a single chip microcomputer or a Micro Controller Unit (MCU) or a Field Programmable Gate Array (FPGA). The processing unit 90 is electrically connected with the display unit 100, and transmits the voltage data, the current data and the power data to the display unit, so as to realize visualization of the power characteristics of the testing device of the PSE equipment.

With continued reference to fig. 3, the flow measurement unit 50 optionally includes a flow measurement resistor.

Specifically, the current measuring unit 50 may be a current measuring resistor, which selects a small resistance value and a large power resistor, such as a 1 ohm 10W resistor. The first output end of the current measurement unit 50 is connected to the first input end ADC1 of the processing unit 90, and a voltage exists at two ends of the current measurement resistor, for example, when the adjustable unit 60 is configured with a high-power adjustable resistor, so that the output current is 1A, and when the current measurement resistor is 1 ohm, the voltage difference value at two ends of the current measurement resistor is 1V, the voltage difference value is measured by the first input end ADC1 of the processing unit 90, and the real-time current can be obtained by dividing the voltage difference value by the resistance value of the current measurement resistor.

With continued reference to fig. 3, optionally, the voltage dividing unit 80 includes a voltage dividing resistor.

Specifically, the voltage dividing unit 80 may be a voltage dividing resistor, the voltage dividing resistor divides the voltage of about 54V dc output by the PD protocol unit 40 into a dc voltage of less than 5V, and the second input terminal ADC2 of the processing unit 90 may measure the voltage.

The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A test apparatus of a PSE device, comprising: the system comprises a network port, a network transformer, a rectifying unit, a PD protocol unit, a current measuring unit, an adjustable unit, a DC-DC unit, a voltage dividing unit, a processing unit and a display unit;

the network port is connected with the network transformer, the network transformer is connected with the rectifying unit, and the rectifying unit is connected with the PD protocol unit;

a first output end of the PD protocol unit is connected to the current measuring unit, a second output end of the PD protocol unit is connected to a first end of the voltage dividing unit, a first output end of the current measuring unit is connected to a first input end of the processing unit, and a second end of the voltage dividing unit is connected to a second input end of the processing unit; a second output end of the current measuring unit is connected with the adjustable unit, a third output end of the current measuring unit is connected with the DC-DC unit, and the DC-DC unit is connected with a third input end of the processing unit;

and the output end of the processing unit is connected with the display unit.

2. The device for testing the PSE equipment as in claim 1, further comprising a communication unit, wherein a first end of the communication unit is connected with the processing unit, and a second end of the communication unit is connected with the network transformer.

3. The testing apparatus of the PSE device as in claim 2, wherein the communication unit comprises a PHY chip.

4. The device for testing of PSE equipment as recited in claim 1, wherein the PD protocol unit comprises an MP8020 chip.

5. The PSE device test apparatus as in claim 1, wherein the adjustable unit comprises an adjustable resistor, and the adjustable resistor has an adjustable resistance.

6. The testing apparatus of the PSE device as in claim 1, wherein the display unit comprises an LCD liquid crystal display.

7. The testing apparatus of the PSE device as in claim 1, wherein the DC-DC unit comprises an MP9928 chip.

8. The testing apparatus of the PSE device as in claim 1, wherein the processing unit comprises a single chip, MCU or FPGA.

9. The device for testing a PSE device as defined in claim 1, wherein the current measurement unit comprises a current measurement resistor.

10. The device for testing a PSE device as defined in claim 1, wherein the voltage dividing unit comprises a voltage dividing resistor.

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