POE & Cable Tester with BT Standard Test

Abstract

A new POE & cable tester with BT standard test, including an interface module, a network transformer, a rectifier module, a power management module, and at least one optocoupler detection module, in which the interface module is connected to a primary coil, a secondary coil output end of the network transformer is connected to a line testing module, a center tap of the network transformer is connected to the rectifier module, the power management module is connected to an output end of the rectifier module, the power management module is connected to at least one optocoupler detection module, and the optocoupler detection module is connected to a data end of a central control module. The present disclosure is introduced based on the market demand for testing IEEE 802.3bt standard POE switch, which allows testing IEEE 802.3bt standard POE switch standard, and allows screening of POE switch standard with RJ45/RJ11 connector.

Claims

1. A new POE & cable tester with BT standard test, comprising an interface module, a network transformer U1, a rectifier module, a power management module, and at least one optocoupler detection module, wherein the interface module is connected to a primary coil, a secondary coil output end of the network transformer U1 is connected to a line testing module, a center tap of the network transformer U1 is connected to the rectifier module, the power management module is connected to an output end of the rectifier module, the power management module is connected to at least one optocoupler detection module respectively, and the optocoupler detection module is connected to a data end of a central control module.

2. The new POE & cable tester with BT standard test according to claim 1, wherein the center tap of the network transformer U1 is connected with a filter module, the filter module adopts series-connected RC filters, each center tap is connected with a set of filter module, each set of filter modules comprises a resistor and a capacitor, an end of the resistor is connected to one center tap of the network transformer U1, an opposite end of the resistor is connected to an end of the capacitor, an opposite end of the capacitor is grounded, and the rectifier module is connected to a connection end between the resistor and the center tap of the network transformer U1.

3. The new POE & cable tester with BT standard test according to claim 1, wherein the rectifier module adopts a bridge rectifier D6 and a bridge rectifier D7, a positive output end of the bridge rectifier D6 is connected to a positive output end of the bridge rectifier D7, and a negative output end of the bridge rectifier D6 is connected to a negative output end of the bridge rectifier D7.

4. The new POE & cable tester with BT standard test according to claim 1, wherein an output end of the rectifier module is connected with an over-voltage protection module, and the over-voltage protection module adopts a TVS tube D8.

5. The new POE & cable tester with BT standard test according to claim 1, wherein the power management module adopts a PoE-PD interface controller U11, a VPN interface of the PoE-PD interface controller U11 is connected to a negative output end of the rectifier module, an ASC interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R28, a CLA interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R48, a CLB interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R49, a COSC interface of the PoE-PD interface controller U11 is connected to an end of a capacitor C16, the end of the capacitor C16 is connected to a DET interface of the PoE-PD interface controller U11 via a resistor R47, an opposite end of the capacitor C16 is connected to the negative output end of the rectifier module, an AUX interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R34, a capacitor C1 is connected in parallel to the resistor R34, an RTN interface and an EP interface of the PoE-PD interface controller U11 are grounded, a GBR interface of the PoE-PD interface controller U11 is connected to a positive output end of the rectifier module via a resistor R29, and a PGO interface, an NCL interface, an NCM interface, and an LCF interface of the PoE-PD interface controller U11 are each connected to one set of the optocoupler detection module.

6. The new POE & cable tester with BT standard test according to claim 1, wherein provided are four sets of the optocoupler detection module; a first set of the optocoupler detection module comprises a current limiting resistor R24, an MOS tube Q5, a resistor R74, an optocoupler U3, a resistor R75, a resistor R76, and a resistor R33, a PGO interface of the PoE-PD interface controller U11 is connected to a positive output end of the rectifier module via the resistor R24, a gate of the MOS tube Q5 is connected to the PGO interface of the PoE-PD interface controller U11, a source of the MOS tube Q5 is grounded, a drain of the MOS tube Q5 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U3, the resistor R76, and the resistor R75 sequentially connected in series, the drain of the MOS tube Q5 is connected to the positive output end of the rectifier module via the resistor R74, an emitter of a photosensitive triode of the optocoupler U3 is grounded, and a collector of the photosensitive triode of the optocoupler U3 is connected to a common I/O port of the central control module; a second set of the optocoupler detection module comprises an optocoupler U4, a resistor R18, a resistor R19, and a resistor R32, an NCL interface of the PoE-PD interface controller U11 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U4, the resistor R19, the resistor R18 sequentially connected in series, an emitter of a photosensitive triode of the optocoupler U4 is grounded, a collector of the photosensitive triode of the optocoupler U4 is connected to a 3.3V power supply via the resistor R32, and the collector of the photosensitive triode of the optocoupler U4 is connected to a common I/O port of the central control module; a third set of the optocoupler detection module comprises an optocoupler U7, a resistor R21, a resistor R20, and a resistor R35, an NCM interface of the PoE-PD interface controller U11 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U7, the resistor R21, and the resistor R20 sequentially connected in series, an emitter of a photosensitive triode of the optocoupler U7 is grounded, a collector of the photosensitive triode of the optocoupler U7 is connected to a 3.3V power supply via the resistor R35, and the collector of the photosensitive triode of the optocoupler U7 is connected to a common I/O port of the central control module; and a fourth set of optocoupler detection module comprises an optocoupler U8, a resistor R23, a resistor R22, and a resistor R38, an LCF interface of the PoE-PD interface controller U11 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U8, the resistor R23, and the resistor R22 sequentially connected in series, an emitter of a photosensitive triode of the optocoupler U8 is grounded, a collector of the photosensitive triode of the optocoupler U8 is connected to a 3.3V power supply via the resistor R38, and the collector of the photosensitive triode of the optocoupler U8 is connected to a common I/O port of the central control module.

7. The new POE & cable tester with BT standard test according to claim 6, wherein a filter capacitor C22 is connected between the positive output end of the rectifier module and ground.

8. The new POE & cable tester with BT standard test according to claim 1, wherein a TVS tube D9 is connected between a gate of the MOS tube Q5 and ground.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a circuit block diagram of the present disclosure.

[0025] FIG. 2 is a circuit diagram of the power management module part of the present disclosure.

[0026] FIG. 3 is a circuit diagram of the optocoupler detection module part of the present disclosure.

[0027] FIG. 4 is a circuit diagram of the interface module part of the present disclosure.

[0028] FIG. 5 is a circuit diagram of the central control module part of the present disclosure.

[0029] FIG. 6 is a circuit diagram of the display interface part of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present embodiment is a preferred embodiment of the present disclosure, and any other principle and basic structure that is the same or similar to the present embodiment falls within the scope of protection of the present disclosure.

[0031] Referring to FIGS. 1-6, protected in the present disclosure is a new POE & cable tester with BT standard test, mainly including an interface module, a network transformer U1, a rectifier module, a power management module, and at least one optocoupler detection module, wherein the interface module is connected to a primary coil, a secondary coil output end of the network transformer U1 is connected to a line testing module, a center tap of the network transformer U1 is connected to the rectifier module, the power management module is connected to an output end of the rectifier module, the power management module is connected to at least one optocoupler detection module respectively, and the optocoupler detection module is connected to a data end of a central control module.

[0032] In the present embodiment, the line testing module may adopt end flashing, length measurement, voltage measurement or other modules for detecting cable functions. The focus of the present disclosure is to adopt the primary coil to complete the detection of BT, and the line testing module may adopt the conventional cable detection module in the prior art.

[0033] In the present embodiment, the central control module adopts the microcontroller chip U2 of model GD32F303VET6, and may be replaced by other models of microcontroller chips in specific implementations, which is only required to satisfy that the outputs of 4 optocoupler detection modules may be simultaneously detected to determine the standard of POE. The central control module requires at least four ordinary I/O ports to complete it, while other peripheral circuits are designed according to other line testing functions.

[0034] In the present embodiment, the interface module adopts an RJ-45 interface PI, which may also be replaced with other interfaces according to the actual situation in the specific implementation.

[0035] In the present embodiment, the network transformer U1 is a network transformer of model XWT-1108GS047, which may be replaced by other models of network transformers with the same function in specific implementations.

[0036] In the present embodiment, the center tap of the network transformer U1 is connected with a filter module, the filter module adopts series-connected RC filters. Since an RJ-45 interface is adopted in the present embodiment, the network transformer U1 has four center taps, and each center tap is connected with a set of filter module. Taking the first set as an example to illustrate the circuit structure, the other filter modules have the same circuit structure as the first group. The first set of filter module includes a resistor R6 and a capacitor C2, an end of the resistor R6 is connected to a first center tap of the network transformer U1, an opposite end of the resistor R6 is connected to an end of the capacitor C2, an opposite end of the capacitor C2 is grounded, and the rectifier module is connected to a connection end between the resistor R6 and the center tap of the network transformer U1.

[0037] In the present embodiment, the rectifier module adopts a bridge rectifier D6 and a bridge rectifier D7. The bridge rectifier D6 and the bridge rectifier D7 both adopt the bridge rectifier chip with the model number MB6S, and may be replaced by other models of network transformers with the same function in specific implementations. A positive output end of the bridge rectifier D6 is connected to a positive output end of the bridge rectifier D7, and a negative output end of the bridge rectifier D6 is connected to a negative output end of the bridge rectifier D7.

[0038] In the present embodiment, an output end of the rectifier module is connected with an over-voltage protection module. The over-voltage protection module adopts a TVS tube D8 of model SMAJ60CA60, and may be replaced by other models or other types of over-voltage protection modules in specific implementations.

[0039] In the present embodiment, the positive output end (i.e., the VPORTP end) of the rectifier module is connected to each optocoupler detection module.

[0040] In the present embodiment, the positive output end (i.e., the VPORTP end) of the rectifier module is connected to the GBR interface of the power management module.

[0041] In the present embodiment, the power management module adopts the PoE-PD interface controller U11 of model NCP1096, and may be replaced by other models of chips with the same function in specific implementations. A VPN interface of the PoE-PD interface controller U11 is connected to a negative output end of the rectifier module, an ASC interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R28, a CLA interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R48, a CLB interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R49, a COSC interface of the PoE-PD interface controller U11 is connected to an end of a capacitor C16, the end of the capacitor C16 is connected to a DET interface of the PoE-PD interface controller U11 via a resistor R47, an opposite end of the capacitor C16 is connected to the negative output end of the rectifier module, an AUX interface of the PoE-PD interface controller U11 is connected to the negative output end of the rectifier module via a resistor R34, a capacitor C1 is connected in parallel to the resistor R34, an RTN interface and an EP interface of the PoE-PD interface controller U11 are grounded, a GBR interface of the PoE-PD interface controller U11 is connected to a positive output end (i.e., the VPORTP end) of the rectifier module via a resistor R29, and a PGO interface, an NCL interface, an NCM interface, an LCF interface of the PoE-PD interface controller U11 are each connected to one set of the optocoupler detection module.

[0042] In the present embodiment, provided are four sets of the optocoupler detection module; a first set of the optocoupler detection module includes a current limiting resistor R24, an MOS tube Q5, a resistor R74, an optocoupler U3, a resistor R75, a resistor R76, and a resistor R33, a PGO interface of the PoE-PD interface controller U11 is connected to a positive output end of the rectifier module via the resistor R24, a gate of the MOS tube Q5 is connected to the PGO interface of the PoE-PD interface controller U11, a source of the MOS tube Q5 is grounded, a drain of the MOS tube Q5 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U3, the resistor R76, and the resistor R75 sequentially connected in series, the drain of the MOS tube Q5 is connected to the positive output end of the rectifier module via the resistor R74, an emitter of a photosensitive triode of the optocoupler U3 is grounded, and a collector of the photosensitive triode of the optocoupler U3 is connected to a common I/O port of the central control module.

[0043] In the present embodiment, a filter capacitor C22 is connected between the positive output end of the rectifier module and ground.

[0044] In the present embodiment, a TVS tube D9 is connected between a gate of the MOS tube Q5 and ground.

[0045] In the present embodiment, a second set of the optocoupler detection module includes an optocoupler U4, a resistor R18, a resistor R19, and a resistor R32, an NCL interface of the PoE-PD interface controller U11 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U4, the resistor R19, the resistor R18 sequentially connected in series, an emitter of a photosensitive triode of the optocoupler U4 is grounded, a collector of the photosensitive triode of the optocoupler U4 is connected to a 3.3V power supply via the resistor R32, and the collector of the photosensitive triode of the optocoupler U4 is connected to a common I/O port of the central control module.

[0046] In the present embodiment, a third set of the optocoupler detection module includes an optocoupler U7, a resistor R21, a resistor R20, and a resistor R35, an NCM interface of the PoE-PD interface controller U11 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U7, the resistor R21, and the resistor R20 sequentially connected in series, an emitter of a photosensitive triode of the optocoupler U7 is grounded, a collector of the photosensitive triode of the optocoupler U7 is connected to a 3.3V power supply via the resistor R35, and the collector of the photosensitive triode of the optocoupler U7 is connected to a common I/O port of the central control module.

[0047] In the present embodiment, a fourth set of optocoupler detection module includes an optocoupler U8, a resistor R23, a resistor R22, and a resistor R38, an LCF interface of the PoE-PD interface controller U11 is connected to the positive output end of the rectifier module via a light-emitting diode of the optocoupler U8, the resistor R23, and the resistor R22 sequentially connected in series, an emitter of a photosensitive triode of the optocoupler U8 is grounded, a collector of the photosensitive triode of the optocoupler U8 is connected to a 3.3V power supply via the resistor R38, and the collector of the photosensitive triode of the optocoupler U8 is connected to a common I/O port of the central control module.

[0048] The IEEE 802.3bt standard detection principle of the present disclosure is as follows: when the PSE device detects the PD device, it classifies the PD device, and responds to and completes the classification of all PSEs through the NCP1096 chip which has been set up with a power level. According to the power that the PSE device manages to provide to the PD, the NCP1096 labels the PSE and writes the result to the status output NCL NCM and LCF pins. The standard of the PSE device is judged by reading the electrical characteristics of the written status output NCL NCM and LCF pins.

[0049] When in use, the POE switch port is connected to the P1 port of the present disclosure via RJ45 terminal cable, and the NCP1096 chip is connected via rectifier, voltage regulator and filter, the NCP1096 chip performs the corresponding and marks the power that the switch manages to provide for the POE switch and writes the test results to the status output NCL NCM and LCF pins, which are isolated via optocoupler, and reads the electrical characteristics of the written status output NCL, NCM, and LCF pins to judge the standard of the PSE equipment.

[0050] The present disclosure is introduced based on the market demand for testing IEEE 802.3bt standard POE switch, which allows testing IEEE 802.3bt standard POE switch standard, and allows the screening of POE switch standard with RJ45/RJ11 connector.